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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2019	Jul. 23, 2019
Document And Entity Information [Abstract]
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, par value $0.01 per share
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name	HURON CONSULTING GROUP INC.
Entity Address, Address Line One	550 West Van Buren Street
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60607
Trading Symbol	HURN
Entity Central Index Key	0001289848
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		22,924,170
Entity File Number	000-50976
City Area Code	(312)
Local Phone Number	583-8700
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Tax Identification Number	01-0666114
Entity Small Business	false
Entity Emerging Growth Company	false

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 9,177		$ 33,107
Receivables from clients, net	116,665		109,677
Costs in Excess of Billings, Current	91,751		69,613
Income tax receivable	846		6,612
Prepaid Expense and Other Assets, Current	14,766		13,922
Total current assets	233,205		232,931
Property and equipment, net	40,189		40,374
Deferred Tax Assets, Net, Noncurrent	1,094		2,153
Long-term investment	59,357		50,429
Operating Lease, Right-of-Use Asset	55,045	$ 56,463	0
Other non-current assets	41,482		30,525
Intangible assets, net	39,037		47,857
Goodwill	645,266		645,263
Total assets	1,114,675		1,049,532
Current liabilities:
Accounts payable	9,456		10,020
Accrued expenses and other current liabilities	20,663	14,650	17,207
Accrued payroll and related benefits	78,619		109,825
Business Combination, Contingent Consideration, Liability, Current	535		9,991
Long-term Debt, Current Maturities	248,034		243,132
Operating Lease, Liability, Current	10,536	10,537	0
Deferred revenues	27,575		28,130
Total current liabilities	395,418		418,305
Non-current liabilities:
Deferred compensation and other liabilities	27,367	20,339	20,875
Business Combination, Contingent Consideration, Liability, Noncurrent	95		1,450
Long-term debt, net of current portion	59,590		53,853
Operating Lease, Liability, Noncurrent	62,130	62,712	0
Operating lease liabilities, net of current portion	0	$ 0	13,693
Deferred income taxes, net	1,714		732
Total non-current liabilities	150,896		90,603
Commitments and contingencies
Stockholders’ equity
Common stock	247		244
Treasury stock	(127,133)		(124,794)
Additional paid-in capital	463,190		452,573
Retained earnings	209,882		196,106
Accumulated other comprehensive income	22,175		16,495
Total stockholders’ equity	568,361		540,624
Total liabilities and stockholders’ equity	$ 1,114,675		$ 1,049,532

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	500,000,000	500,000,000
Common stock, shares issued (shares)	25,316,458	25,114,739
Treasury stock, shares (shares)	2,399,279	2,568,288

Consolidated Statements of Earnings and Other Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues and reimbursable expenses:
Revenue from Contract with Customer, Including Assessed Tax	$ 220,754	$ 197,544	$ 425,199	$ 391,223
Reimbursable Revenues	23,534	20,733	42,151	38,352
Total revenues and reimbursable expenses	244,288	218,277	467,350	429,575
Direct costs and reimbursable expenses (exclusive of depreciation and amortization shown in operating expenses):
Cost of Goods and Services Sold	141,628	127,574	279,408	260,360
Cost, Depreciation and Amortization	1,171	968	2,288	2,186
Reimbursable Expense	23,657	20,915	42,326	38,464
Total direct costs and reimbursable expenses	166,456	149,457	324,022	301,010
Operating expenses and other gains, net
Selling, general and administrative expenses	52,537	45,488	103,286	92,566
Restructuring charges	754	1,984	2,029	2,696
Gain (Loss) Related To Litigation Settlement And Other Operating Gains	485	6,707	941	5,877
Depreciation and amortization	7,151	8,917	14,323	17,720
Total operating expenses and other gains, net	59,957	49,682	118,697	107,105
Operating income	17,875	19,138	24,631	21,460
Other income (expense), net:
Interest expense, net of interest income	(4,524)	(5,022)	(8,782)	(10,008)
Other income (expense), net	695	(5,693)	2,912	(5,838)
Total other expense, net	(3,829)	(10,715)	(5,870)	(15,846)
Income from continuing operations before taxes	14,046	8,423	18,761	5,614
Income tax expense	3,477	2,561	4,842	2,974
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	10,569	5,862	13,919	2,640
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(97)	(490)	(143)	(532)
Net income	$ 10,472	$ 5,372	$ 13,776	$ 2,108
Net earnings per basic share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.48	$ 0.27	$ 0.63	$ 0.12
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	(0.02)	0	(0.02)
Basic (USD per share)	0.48	0.25	0.63	0.10
Net earnings per diluted share:
Income (Loss) from Continuing Operations, Per Diluted Share	0.47	0.27	0.62	0.12
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0	(0.02)	0	(0.02)
Earnings Per Share, Diluted	$ 0.47	$ 0.25	$ 0.62	$ 0.10
Weighted average shares used in calculating earnings per share:
Weighted average common shares outstanding – basic	21,997	21,709	21,933	21,651
Weighted average common shares outstanding – diluted	22,400	21,918	22,356	21,866
Comprehensive income:
Net income	$ 10,472	$ 5,372	$ 13,776	$ 2,108
Foreign currency translation adjustments, net of tax	(359)	(954)	(43)	(920)
Unrealized gain on investment, net of tax	3,915	3,159	6,572	5,325
Unrealized gain (loss) on cash flow hedging instruments, net of tax	(612)	183	(849)	615
Other comprehensive income	2,944	2,388	5,680	5,020
Comprehensive income	$ 13,416	$ 7,760	$ 19,456	$ 7,128

Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance, shares at Dec. 31, 2017		(24,098,822)	(2,591,135)
Beginning Balance at Dec. 31, 2017	$ 503,316	$ 241	$ (121,994)	$ 434,256	$ 180,443	$ 10,370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	7,128				2,108	5,020
Issuance of common stock in connection with:
Restricted stock awards, net of cancellations, shares		206,480	34,095
Restricted stock awards, net of cancellations	0	$ 2	$ 1,499	(1,501)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		20,000
Stock Issued During Period, Value, Stock Options Exercised	469	$ 1		468
Share-based compensation	8,590			8,590
Shares redeemed for employee tax withholdings, shares			(76,715)
Shares redeemed for employee tax withholdings	(2,720)		$ 2,720
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification \| Accounting Standards Update 2014-09 [Member]	1,956				1,956
Ending Balance, shares at Jun. 30, 2018		(24,325,302)	(2,633,755)
Ending Balance at Jun. 30, 2018	518,739	$ 244	$ (123,215)	441,813	184,507	15,390
Beginning Balance, shares at Mar. 31, 2018		(24,307,368)	(2,632,790)
Beginning Balance at Mar. 31, 2018	507,470	$ 243	$ (123,235)	438,325	179,135	13,002
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	7,760				5,372	2,388
Issuance of common stock in connection with:
Restricted stock awards, net of cancellations, shares		7,934	(82)
Restricted stock awards, net of cancellations	0	$ 0	$ 56	(56)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		10,000
Stock Issued During Period, Value, Stock Options Exercised	235	$ 1		234
Share-based compensation	3,310			3,310
Shares redeemed for employee tax withholdings, shares			(883)
Shares redeemed for employee tax withholdings	(36)		$ 36
Ending Balance, shares at Jun. 30, 2018		(24,325,302)	(2,633,755)
Ending Balance at Jun. 30, 2018	518,739	$ 244	$ (123,215)	441,813	184,507	15,390
Beginning Balance, shares at Dec. 31, 2018		(24,418,252)	(2,671,962)
Beginning Balance at Dec. 31, 2018	540,624	$ 244	$ (124,794)	452,573	196,106	16,495
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	19,456				13,776	5,680
Issuance of common stock in connection with:
Restricted stock awards, net of cancellations, shares		272,941	25,174
Restricted stock awards, net of cancellations	0	$ 3	$ 2,121	(2,124)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		20,000
Stock Issued During Period, Value, Stock Options Exercised	468	$ 0		468
Share-based compensation	12,273			12,273
Shares redeemed for employee tax withholdings, shares			(96,038)
Shares redeemed for employee tax withholdings	(4,460)		$ 4,460
Ending Balance, shares at Jun. 30, 2019		(24,711,193)	(2,742,826)
Ending Balance at Jun. 30, 2019	568,361	$ 247	$ (127,133)	463,190	209,882	22,175
Beginning Balance, shares at Mar. 31, 2019		(24,682,802)	2,738,850
Beginning Balance at Mar. 31, 2019	549,653	$ 247	$ (126,983)	457,748	199,410	19,231
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	13,416				10,472	2,944
Issuance of common stock in connection with:
Restricted stock awards, net of cancellations, shares		18,391	(2,438)
Restricted stock awards, net of cancellations	0	$ 0	$ (75)	75
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		10,000
Stock Issued During Period, Value, Stock Options Exercised	234	$ 0		234
Share-based compensation	5,133			5,133
Shares redeemed for employee tax withholdings, shares			(1,538)
Shares redeemed for employee tax withholdings	(75)		$ 75
Ending Balance, shares at Jun. 30, 2019		(24,711,193)	(2,742,826)
Ending Balance at Jun. 30, 2019	$ 568,361	$ 247	$ (127,133)	$ 463,190	$ 209,882	$ 22,175

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 13,776	$ 2,108
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	21,682	20,394
Operating Lease, Impairment Loss	805	0
Share-based compensation	11,483	9,117
Amortization of debt discount and issuance costs	5,264	5,155
Allowances For Doubtful Accounts And Unbilled Services	170	390
Gain (Loss) on Disposition of Business	0	(5,831)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(876)	(3,350)
Changes in operating assets and liabilities, net of acquisitions and divestiture:
(Increase) decrease in receivables from clients, net	(6,984)	(5,384)
(Increase) decrease in unbilled services, net	(22,105)	(19,693)
(Increase) decrease in current income tax receivable / payable, net	6,486	600
(Increase) decrease in other assets	(4,743)	(4,140)
Increase (decrease) in accounts payable and other liabilities	(133)	(996)
Increase (decrease) in accrued payroll and related benefits	(30,462)	(4,736)
Increase (decrease) in deferred revenues	(570)	1,617
Net cash provided by (used in) operating activities	(6,207)	6,913
Cash flows from investing activities:
Purchases of property and equipment, net	(6,384)	(5,131)
Investment in life insurance policies	(4,087)	(1,689)
Purchases of businesses, net of cash acquired	0	(215)
Capitalization of internally developed software costs	(4,409)	(2,149)
Costs in Excess of Billings, Current	91,751
Proceeds from Sale and Collection of Notes Receivable	0	1,040
Proceeds from Divestiture of Businesses, Net of Cash Divested	0	(1,862)
Net cash used in investing activities	(14,880)	(10,006)
Cash flows from financing activities:
Proceeds from exercise of stock options	469	469
Shares redeemed for employee tax withholdings	(4,460)	(2,720)
Proceeds from borrowings under credit facility	87,500	139,300
Repayments of debt	(81,756)	(134,049)
Payments of Debt Issuance Costs	0	1,385
Payment of Contingent Consideration Liabilities	4,674	4,906
Net cash used in financing activities	(2,921)	(3,291)
Effect of exchange rate changes on cash	78	(73)
Net decrease in cash and cash equivalents	(23,930)	(6,457)
Cash and cash equivalents at beginning of the period	33,107	16,909
Cash and cash equivalents at end of the period	9,177	10,452
Non-cash investing and financing activities:
Property and equipment expenditures and capitalized software included in accounts payable and accrued expenses	3,842	1,483
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	3,611
Contingent consideration related to business acquisitions	$ 0	$ 212

Description of Business	6 Months Ended
Description of Business	Jun. 30, 2019
Accounting Policies [Abstract]
Description of Business	Description of Business Huron is a global consultancy that helps clients drive growth, enhance performance and sustain leadership in the markets they serve. We partner with clients to develop strategies and implement solutions that enable the transformative change our clients need to own their future.

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation and Significant Accounting Policies The accompanying unaudited consolidated financial statements reflect the financial position, results of operations, and cash flows as of and for the three and six months ended June 30, 2019 and 2018. These financial statements have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for Quarterly Reports on Form 10-Q. Accordingly, these financial statements do not include all of the information and note disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. In the opinion of management, these financial statements reflect all adjustments of a normal, recurring nature necessary for the fair statement of our financial position, results of operations, and cash flows for the interim periods presented in conformity with GAAP. These financial statements should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2018 included in our Annual Report on Form 10-K and our Quarterly Report on Form 10-Q for the period ended March 31, 2019. Our results for any interim period are not necessarily indicative of results for a full year or any other interim period. On January 1, 2019, we adopted Accounting Standard Update ("ASU") 2016-02, Leases. Below is an update to our lease accounting policy as a result of the adoption. Refer to Note 3 "New Accounting Pronouncements" for additional information on the adoption of ASU 2016-02. Leases We determine if an arrangement contains a lease and the classification of such lease at inception. As of June 30, 2019, all of our material leases are classified as operating leases; we have not entered into any material finance leases. For all operating leases with an initial term greater than 12 months, we recognize an operating lease right-of-use ("ROU") asset and operating lease liability. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. Operating lease ROU assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date and provided by the administrative agent for our senior secured credit facility, in determining the present value of lease payments. Operating lease ROU assets exclude lease incentives. Certain lease agreements contain variable lease payments that do not depend on an index or rate. These variable lease payments are not included in the calculation of the operating lease ROU asset and operating lease liability; instead, they are expensed as incurred. Certain lease agreements contain lease and nonlease components, which are accounted for separately. We separate the contract consideration between lease and nonlease components based on the relative standalone price of each component. Our leases may contain options to extend or terminate the lease, and we include these terms in our calculation of the operating lease ROU asset and operating lease liability when it is reasonably certain that we will exercise the option. Operating lease expense is recognized on a straight-line basis over the lease term and recorded within selling, general and administrative expenses on our consolidated statement of operations. In accordance with our accounting policy for impairment of long-lived assets, operating lease ROU assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset group to which the operating lease ROU asset is assigned may not be recoverable. We evaluate the recoverability of the asset group based on forecasted undiscounted cash flows. See Note 5 "Leases" for additional information on our leases, including the lease impairment charges recorded in the first six months of 2019.

New Accounting Pronouncements

6 Months Ended

Jun. 30, 2019

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Pronouncements

Recently Adopted

In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases, as a new Topic, ASC 842, which superseded ASC Topic 840, Leases, and sets forth the principles for the recognition, measurement, presentation, and disclosure of leases for both lessees and lessors. ASU 2016-02 requires lessees to classify leases as either finance or operating leases and to record on the balance

sheet a right-of-use asset and a lease liability, equal to the present value of the remaining lease payments, for all leases with a term greater than 12 months regardless of the lease classification. The lease classification will determine whether the lease expense is recognized using an effective interest rate method or on a straight-line basis over the term of the lease. In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements, which provides an optional transition method that allows entities to initially apply ASC 842 at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings on the adoption date. We adopted ASC 842 effective January 1, 2019 on a modified retrospective basis for existing leases using the transition method allowed by ASU 2018-11, which had no impact on our consolidated financial statements in the prior periods presented. The new lease standard had a material impact on our consolidated balance sheet upon adoption but did not impact our consolidated statement of operations. The most significant impact to our consolidated balance sheet is the recognition of ROU assets and lease liabilities for operating leases. The impact of the new lease standard on our consolidated balance sheet upon adoption follows:



	As of December 31, 2018		ASC 842 Adjustment			As of January 1, 2019
Assets
Operating lease right-of-use assets	$	—	$	56,463		$	56,463

Liabilities
Accrued expenses and other current liabilities	$	17,207	$	(2,557	)	$	14,650
Current maturities of operating lease liabilities	$	—	$	10,537		$	10,537
Deferred compensation and other liabilities	$	20,875	$	(536	)	$	20,339
Deferred lease incentives	$	13,693	$	(13,693	)	$	—
Operating lease liabilities, net of current portion	$	—	$	62,712		$	62,712

Not Yet Adopted

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement, which modifies certain disclosure requirements related to fair value measurements. ASU 2018-13 will be effective for us beginning January 1, 2020, with early adoption permitted. We do not expect this guidance to have an impact on the amounts reported on our consolidated financial statements, and we are currently evaluating the potential impact this guidance will have on our disclosures within the notes to our consolidated financial statements.

Goodwill and Intangible Assets

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

The table below sets forth the changes in the carrying amount of goodwill by reportable segment for the six months ended June 30, 2019.



	Healthcare			Business Advisory			Education		Total
Balance as of December 31, 2018:
Goodwill	$	636,810		$	301,700		$	102,829	$	1,041,339
Accumulated impairment losses	(208,081		)	(187,995		)	—		(396,076		)
Goodwill, net as of December 31, 2018	428,729			113,705			102,829		645,263
Foreign currency translation	—			3			—		3
Goodwill, net as of June 30, 2019	$	428,729		$	113,708		$	102,829	$	645,266

Intangible Assets

Intangible assets as of June 30, 2019 and December 31, 2018 consisted of the following:



		As of June 30, 2019				As of December 31, 2018
	Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	4 to 13	$	91,968	$	60,482	$	98,235	$	60,462
Trade names	5 to 6	28,930		24,537		28,930		23,181
Technology and software	3 to 5	5,694		3,581		5,694		2,842
Non-competition agreements	3 to 5	2,540		1,495		3,650		2,241
Favorable lease contract	3	—		—		720		646
Total		$	129,132	$	90,095	$	137,229	$	89,372

Identifiable intangible assets with finite lives are amortized over their estimated useful lives. Customer relationships, as well as certain trade names and technology and software, are amortized on an accelerated basis to correspond to the cash flows expected to be derived from the assets. All other intangible assets with finite lives are amortized on a straight-line basis.

Intangible asset amortization expense was $4.3 million and $6.0 million for the three months ended June 30, 2019 and 2018, respectively; and $8.8 million and $12.3 million for the six months ended June 30, 2019 and 2018, respectively. The table below sets forth the estimated annual amortization expense for the year ending December 31, 2019 and each of the five succeeding years for the intangible assets recorded as of June 30, 2019.



Year Ending December 31,	Estimated Amortization Expense
2019	$	17,206
2020	$	12,083
2021	$	8,064
2022	$	6,090
2023	$	3,512
2024	$	741

Actual future amortization expense could differ from these estimated amounts as a result of future acquisitions, dispositions, and other factors.

Leases Leases

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Leases of Lessee Disclosure [Text Block]

Leases

We lease office space, data centers and certain equipment under operating leases expiring on various dates through 2028, with various renewal options that can extend the lease terms by one to ten years. Our operating leases include fixed payments plus, in some cases, scheduled base rent increases over the term of the lease. Certain leases require variable payments of real estate taxes and insurance. We exclude these variable payments from the measurements of our lease liabilities and expense them as incurred. Additionally, certain leases require payments for operating expenses applicable to the property. We account for these nonlease components separately from the lease components. No lease agreements contain any residual value guarantees or material restrictive covenants. As of June 30, 2019, we have not entered into any material finance leases. We sublease certain office spaces to third parties resulting from restructuring activities in certain locations.

Operating lease right-of-use ("ROU") assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset group to which the operating lease ROU asset is assigned may not be recoverable. First, we test the asset group for recoverability by comparing the undiscounted cash flows of the asset group, which include expected future lease and nonlease payments under the lease agreement offset by expected sublease income, to the carrying amount of the asset group. If the first step of the long-lived asset impairment test concludes that the carrying amount of the asset group is not recoverable, we perform the second step of the long-lived asset impairment test by comparing the fair value of the asset group to its carrying amount and recognizing a lease impairment charge for the amount by which the carrying amount exceeds the fair value. To estimate the fair value of the asset group, we rely on a discounted cash flow approach using market participant assumptions of the expected cash flows and discount rate. During the first six

months of 2019, we recorded $0.8 million of lease impairment charges for office spaces vacated in the first six months of 2019, of which $0.6 million was allocated to the operating lease ROU assets and $0.2 million was allocated to the leasehold improvements based on their relative carrying amounts. The $0.8 million lease impairment charge was recognized in restructuring charges on our consolidated statement of operations. See Note 9 "Restructuring Charges" for additional information on our restructuring activities.

Additional information on our operating leases as of June 30, 2019 follows.



Balance Sheet	June 30, 2019
Operating lease right-of-use assets	$	55,045

Current maturities of operating lease liabilities	$	10,536
Operating lease liabilities, net of current portion	62,130
Total lease liabilities	$	72,666



Lease Cost	Three Months Ended June 30, 2019			Six Months Ended June 30, 2019
Operating lease cost	$	3,055		$	6,055
Short-term leases ⁽¹⁾	128			175
Variable lease costs	301			675
Sublease income	(618		)	(1,235		)
Net lease cost ^(2)(3)(4)	$	2,866		$	5,670


(1)	Includes variable lease costs related to short-term leases.


(2)	Net lease cost includes $0.2 million for both the three and six months ended June 30, 2019 recorded as restructuring charges as they relate to vacated office spaces. See Note 9 "Restructuring Charges" for additional information on our vacated office spaces.


(3)	Net lease cost includes $0.1 million for both the three and six months ended June 30, 2019 related to vacated office spaces directly related to discontinued operations.


(4)	Rent expense, including operating expenses, real estate taxes and insurance, recorded under ASC 840 for the three and six months ended June 30, 2018 was $3.7 million and $7.6 million, respectively.

The table below summarizes the remaining expected lease payments under our operating leases as of June 30, 2019 and December 31, 2018.



Future Lease Payments	June 30, 2019			December 31, 2018 ^{(1, 2)}
2019	$	6,851		$	13,701
2020	13,606			12,724
2021	12,536			11,590
2022	11,646			10,766
2023	11,622			10,707
Thereafter	28,747			27,033
Total operating lease payments	$	85,008		$	86,521
Less: imputed interest	(12,342		)	n/a
Present value of operating lease liabilities	$	72,666		n/a


(1)	The expected lease payments as of December 31, 2018 represent our future minimum rental commitments as defined by ASC 840.


(2)	As of December 31, 2018, the expected total future minimum sublease income to be received was $10.2 million.



Other Information	Six Months Ended June 30, 2019
Cash paid for operating lease liabilities	$	7,056
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	3,611

Weighted average remaining lease term - operating leases	6.7 years
Weighted average discount rate - operating leases	4.7		%

Revenues Revenue	6 Months Ended
Revenues Revenue	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenues For the three months ended June 30, 2019 and 2018, we recognized revenues of $220.8 million and $197.5 million, respectively. Of the $220.8 million recognized in the second quarter of 2019, we recognized revenues of $3.6 million from obligations satisfied, or partially satisfied, in prior periods, primarily due to the release of allowances on unbilled services due to securing contract amendments. During the second quarter of 2019, we recognized a $0.3 million decrease to revenues due to changes in the estimates of our variable consideration under performance-based billing arrangements. Of the $197.5 million recognized in the second quarter of 2018, we recognized revenues of $5.2 million from obligations satisfied, or partially satisfied, in prior periods, of which $2.9 million was primarily due to the release of allowances on unbilled services due to securing contract amendments and $2.3 million was due to changes in the estimates of our variable consideration under performance-based billing arrangements. For the six months ended June 30, 2019 and 2018, we recognized revenues of $425.2 million and $391.2 million, respectively. Of the $425.2 million recognized in the first six months of 2019, we recognized revenues of $2.1 million from obligations satisfied, or partially satisfied, in prior periods, primarily due to the release of allowances on unbilled services due to securing contract amendments. During the first six months of 2019, we recognized a $1.5 million decrease to revenues due to changes in the estimates of our variable consideration under performance-based billing arrangements. Of the $391.2 million recognized in the first six months of 2018, we recognized revenues of $8.1 million from obligations satisfied, or partially satisfied, in prior periods, of which $4.7 million was due to changes in the estimates of our variable consideration under performance-based billing arrangements and $3.4 million was primarily due to the release of allowances on unbilled services due to securing contract amendments. As of June 30, 2019, we had $65.1 million of remaining performance obligations under engagements with original expected durations greater than one year. These remaining performance obligations exclude obligations under contracts with an original expected duration of one year or less, variable consideration which has been excluded from the total transaction price due to the constraint, and performance obligations under time-and-expense engagements which are recognized in the amount invoiced. Of the $65.1 million of performance obligations, we expect to recognize approximately $37.5 million as revenue in 2019, $16.4 million in 2020, and the remaining $11.2 million thereafter. Actual revenue recognition could differ from these amounts as a result of changes in the estimated timing of work to be performed, adjustments to estimated variable consideration in performance-based arrangements, or other factors. Contract Assets and Liabilities The payment terms and conditions in our customer contracts vary. Differences between the timing of billings and the recognition of revenue are recognized as either unbilled services or deferred revenues in the consolidated balance sheets. Unbilled services include revenues recognized for services performed but not yet billed to clients. Services performed that we are not yet entitled to bill because certain events, such as the completion of the measurement period or client approval in performance-based engagements, must occur are recorded as contract assets and included within unbilled services, net. The contract asset balance as of June 30, 2019 and December 31, 2018 was $29.8 million and $9.1 million, respectively. The $20.7 million increase primarily reflects timing differences between the completion of our performance obligations and the amounts billed or billable to clients in accordance with their contractual billing terms. Client prepayments and retainers are classified as deferred revenues and recognized over future periods in accordance with the applicable engagement agreement and our revenue recognition policy. Our deferred revenues balance as of June 30, 2019 and December 31, 2018, was $27.6 million and $28.1 million, respectively. The $0.5 million decrease primarily reflects timing differences between client payments in accordance with their contract terms and the completion of our performance obligations. For the three and six months ended June 30, 2019, $10.7 million and $22.5 million, respectively, of revenues recognized were included in the deferred revenue balance as of December 31, 2018.

Earnings Per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Basic earnings per share excludes dilution and is computed by dividing net income by the weighted average number of common shares outstanding for the period, excluding unvested restricted common stock. Diluted earnings per share reflects the potential reduction in earnings per share that could occur if securities or other contracts to issue common stock were exercised or converted into common stock under the treasury stock method. Such securities or other contracts include unvested restricted stock awards, outstanding common stock options, convertible senior notes, and outstanding warrants, to the extent dilutive. Earnings (loss) per share under the basic and diluted computations are as follows:



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income from continuing operations	$	10,569		$	5,862		$	13,919		$	2,640
Loss from discontinued operations, net of tax	(97		)	(490		)	(143		)	(532		)
Net income	$	10,472		$	5,372		$	13,776		$	2,108

Weighted average common shares outstanding – basic	21,997			21,709			21,933			21,651
Weighted average common stock equivalents	403			209			423			215
Weighted average common shares outstanding – diluted	22,400			21,918			22,356			21,866

Net earnings per basic share:
Net income from continuing operations	$	0.48		$	0.27		$	0.63		$	0.12
Loss from discontinued operations, net of tax	—			(0.02		)	—			(0.02		)
Net income	$	0.48		$	0.25		$	0.63		$	0.10

Net earnings per diluted share:
Net income from continuing operations	$	0.47		$	0.27		$	0.62		$	0.12
Loss from discontinued operations, net of tax	—			(0.02		)	—			(0.02		)
Net income	$	0.47		$	0.25		$	0.62		$	0.10

The number of anti-dilutive securities excluded from the computation of the weighted average common stock equivalents presented above were as follows:



	As of June 30,
	2019	2018
Unvested restricted stock awards	—	63
Outstanding common stock options	—	37
Convertible senior notes	3,129	3,129
Warrants related to the issuance of convertible senior notes	3,129	3,129
Total anti-dilutive securities	6,258	6,358

See Note 8 “Financing Arrangements” for further information on the convertible senior notes and warrants related to the issuance of convertible notes.

We currently have a share repurchase program permitting us to repurchase up to $125 million of our common stock through October 31, 2019 (the “Share Repurchase Program”). The amount and timing of the repurchases will be determined by management and will depend on a variety of factors, including the trading price of our common stock, capacity under our credit facility, general market and business conditions, and applicable legal requirements. No shares were repurchased during the first six months of 2019 and 2018. As of June 30, 2019, $35.1 million remains available for share repurchases.

Financing Arrangements

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Financing Arrangements

A summary of the carrying amounts of our debt follows:



	June 30, 2019			December 31, 2018
1.25% convertible senior notes due 2019	$	247,512		$	242,617
Senior secured credit facility	56,000			50,000
Promissory note due 2024	4,112			4,368
Total long-term debt	$	307,624		$	296,985
Current maturities of long-term debt	(248,034		)	(243,132		)
Long-term debt, net of current portion	$	59,590		$	53,853

Below is a summary of the scheduled remaining principal payments of our debt as of June 30, 2019.



	Principal Payments of Long-Term Debt
2019	$	250,259
2020	$	529
2021	$	544
2022	$	559
2023	$	56,575
Thereafter	$	1,646

Convertible Notes

In September 2014, the Company issued $250 million principal amount of 1.25% convertible senior notes due 2019 (the “Convertible Notes”) in a private offering. The Convertible Notes are governed by the terms of an indenture between the Company and U.S. Bank National Association, as Trustee (the “Indenture”). The Convertible Notes are senior unsecured obligations of the Company and will pay interest semi-annually on April 1 and October 1 of each year at an annual rate of 1.25%. The Convertible Notes will mature on October 1, 2019, unless earlier repurchased by the Company or converted in accordance with their terms. We expect to refinance the principal amount of the outstanding Convertible Notes at maturity with the borrowing capacity available under our revolving credit facility.

Upon conversion, the Convertible Notes will be settled, at our election, in cash, shares of the Company’s common stock, or a combination of cash and shares of the Company’s common stock. Our current intent and policy is to settle conversions with a combination of cash and shares of common stock with the principal amount of the Convertible Notes paid in cash, in accordance with the settlement provisions of the Indenture.

The initial conversion rate for the Convertible Notes is 12.5170 shares of our common stock per $1,000 principal amount of the Convertible Notes, which is equal to an initial conversion price of approximately $79.89 per share of our common stock. The conversion rate will be subject to adjustment upon the occurrence of certain specified events but will not be adjusted for accrued and unpaid interest, except in certain limited circumstances described in the Indenture. Upon the occurrence of a “make-whole fundamental change” (as defined in the Indenture) the Company will, in certain circumstances, increase the conversion rate by a number of additional shares for a holder that elects to convert its Convertible Notes in connection with such make-whole fundamental change. Additionally, if the Company undergoes a “fundamental change” (as defined in the Indenture), a holder will have the option to require the Company to repurchase all or a portion of its Convertible Notes for cash at a price equal to 100% of the principal amount of the Convertible Notes being repurchased plus any accrued and unpaid interest. As discussed below, the convertible note hedge transactions and warrants, which were entered into in connection with the Convertible Notes, effectively raise the price at which economic dilution would occur from the initial conversion price of approximately $79.89 to approximately $97.12 per share.

Holders of the Convertible Notes had the option to convert the Convertible Notes any time prior to July 1, 2019, only under the following circumstances:

•

during any calendar quarter (and only during such calendar quarter) commencing after December 31, 2014 if, for each of at least 20 trading days (whether or not consecutive) during the 30 consecutive trading day period ending on, and including, the last trading day of the immediately preceding calendar quarter, the last reported sale price of the Company’s common stock for such trading day is equal to or greater than 130% of the applicable conversion price on such trading day;

•

during the five consecutive business day period immediately following any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which, for each trading day of the measurement period, the “trading price” (as defined in the Indenture) per $1,000 principal amount of the Convertible Notes for such trading day was less than 98% of the product of the last reported sale price of the Company’s common stock for such trading day and the applicable conversion rate on such trading day; or


•	upon the occurrence of specified corporate transactions described in the Indenture.

On or after July 1, 2019 until the close of business on the second scheduled trading day immediately preceding the maturity date, a holder may convert all or a portion of its Convertible Notes, regardless of the foregoing circumstances.

We have separated the Convertible Notes into liability and equity components. The carrying amount of the liability component was determined by measuring the fair value of a similar liability that does not have an associated convertible feature, assuming our non-convertible debt borrowing rate. The carrying value of the equity component representing the conversion option, which is recognized as a debt discount, was determined by deducting the fair value of the liability component from the proceeds of the Convertible Notes. The debt discount is amortized to interest expense using an effective interest rate of 4.751% over the term of the Convertible Notes. As of June 30, 2019, the remaining life of the Convertible Notes is three months. The equity component will not be remeasured as long as it continues to meet the conditions for equity classification.

The transaction costs related to the issuance of the Convertible Notes were separated into liability and equity components based on their relative values, as determined above. Transaction costs attributable to the liability component are recorded as a deduction to the carrying amount of the liability and amortized to interest expense over the term of the Convertible Notes; and transaction costs attributable to the equity component are netted with the equity component of the Convertible Notes in stockholders’ equity. Total debt issuance costs were approximately $7.3 million, of which $6.2 million was allocated to liability issuance costs and $1.1 million was allocated to equity issuance costs.

As of June 30, 2019, and December 31, 2018, the Convertible Notes consisted of the following:



	June 30, 2019			December 31, 2018
Liability component:
Proceeds	$	250,000		$	250,000
Less: debt discount, net of amortization	(2,171		)	(6,436		)
Less: debt issuance costs, net of amortization	(317		)	(947		)
Net carrying amount	$	247,512		$	242,617
Equity component ⁽¹⁾	$	39,287		$	39,287

(1)Included in additional paid-in capital on the consolidated balance sheet.

The following table presents the amount of interest expense recognized related to the Convertible Notes for the periods presented.



	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contractual interest coupon	$	781	$	781	$	1,563	$	1,563
Amortization of debt discount	2,145		2,047		4,265		4,068
Amortization of debt issuance costs	315		310		630		619
Total interest expense	$	3,241	$	3,138	$	6,458	$	6,250

In connection with the issuance of the Convertible Notes, we entered into convertible note hedge transactions and warrant transactions. The convertible note hedge transactions are intended to reduce the potential future economic dilution associated with the conversion of the Convertible Notes and, combined with the warrants, effectively raise the price at which economic dilution would occur from the initial conversion price of approximately $79.89 to approximately $97.12 per share. For purposes of the computation of diluted earnings per share in accordance with GAAP, dilution will occur when the average share price of our common stock for a given period exceeds the conversion price of the Convertible Notes, which initially is equal to approximately $79.89 per share. The convertible note hedge transactions and warrant transactions are discussed separately below.

•

Convertible Note Hedge Transactions. In connection with the issuance of the Convertible Notes, the Company entered into convertible note hedge transactions whereby the Company has call options to purchase a total of approximately 3.1 million shares of the Company’s common stock, which is the number of shares initially issuable upon conversion of the Convertible Notes in full, at a price of approximately $79.89, which corresponds to the initial conversion price of the Convertible Notes, subject to customary anti-dilution adjustments substantially similar to those in the Convertible Notes. The convertible note hedge transactions are exercisable upon conversion of the Convertible Notes and will expire in 2019 if not earlier exercised. We paid an aggregate amount of $42.1 million for the convertible note hedge transactions, which was recorded as additional paid-in capital on the consolidated balance sheet. The convertible note hedge transactions are separate transactions and are not part of the terms of the Convertible Notes.

•

Warrants. In connection with the issuance of the Convertible Notes, the Company sold warrants whereby the holders of the warrants have the option to purchase a total of approximately 3.1 million shares of the Company’s common stock at a strike price of approximately $97.12. The warrants will expire incrementally on 100 different dates from January 6, 2020 to May 28, 2020 and are exercisable at each such expiry date. If the average market value per share of our common stock for the reporting period exceeds the strike price of the warrants, the warrants will have a dilutive effect on our earnings per share. We received aggregate proceeds of $23.6 million from the sale of the warrants, which was recorded as additional paid-in capital on the consolidated balance sheet. The warrants are separate transactions and are not part of the terms of the Convertible Notes or the convertible note hedge transactions.

The Company recorded an initial deferred tax liability of $15.4 million in connection with the debt discount associated with the Convertible Notes and recorded an initial deferred tax asset of $16.5 million in connection with the convertible note hedge transactions. The deferred tax liability and deferred tax asset are included in deferred income taxes, net on the consolidated balance sheets.

Senior Secured Credit Facility

The Company has a $500 million senior secured revolving credit facility, subject to the terms of a Second Amended and Restated Credit Agreement dated as of March 31, 2015, as amended to date (as amended and modified the "Amended Credit Agreement"), that becomes due and payable in full upon maturity on March 23, 2023. The Amended Credit Agreement provides the option to increase the revolving credit facility or establish term loan facilities in an aggregate amount of up to $150 million, subject to customary conditions and the approval of any lender whose commitment would be increased, resulting in a maximum available principal amount under the Amended Credit Agreement of $650 million. The initial borrowings under the Amended Credit Agreement were used to refinance borrowings outstanding under a prior credit agreement, and future borrowings under the Amended Credit Agreement may be used for working capital, capital expenditures, acquisitions of businesses, share repurchases, and general corporate purposes.

Fees and interest on borrowings vary based on our Consolidated Leverage Ratio (as defined in the Amended Credit Agreement). At our option, borrowings under the Amended Credit Agreement will bear interest at one, two, three or six-month LIBOR or an alternate base rate, in each case plus the applicable margin. The applicable margin will fluctuate between 1.25% per annum and 2.00% per annum, in the case of

LIBOR borrowings, or between 0.25% per annum and 1.00% per annum, in the case of base rate loans, based upon our Consolidated Leverage Ratio at such time.

Amounts borrowed under the Amended Credit Agreement may be prepaid at any time without premium or penalty. We are required to prepay the amounts outstanding under the Amended Credit Agreement in certain circumstances, including a requirement to pay all amounts outstanding under the Amended Credit Agreement 90 days prior to the Convertible Indebtedness Maturity Date (as defined in the Amended Credit Agreement) unless (1) the Convertible Indebtedness Maturity Date is waived or extended to a later date, (2) the Company can demonstrate (a) Liquidity (as defined in the Amended Credit Agreement) in an amount at least equal to the principal amount due on the Convertible Indebtedness Maturity Date, and (b) financial covenant compliance after giving effect to such payments and any additional indebtedness incurred on a pro forma basis, or (3) this requirement is waived by the Required Lenders (as defined in the Amended Credit Agreement). In addition, we have the right to permanently reduce or terminate the unused portion of the commitments provided under the Amended Credit Agreement at any time.

The loans and obligations under the Amended Credit Agreement are secured pursuant to a Second Amended and Restated Security Agreement and a Second Amended and Restated Pledge Agreement (the “Pledge Agreement”) with Bank of America, N.A. as collateral agent, pursuant to which the Company and the subsidiary guarantors grant Bank of America, N.A., for the ratable benefit of the lenders under the Amended Credit Agreement, a first-priority lien, subject to permitted liens, on substantially all of the personal property assets of the Company and the subsidiary guarantors, and a pledge of 100% of the stock or other equity interests in all domestic subsidiaries and 65% of the stock or other equity interests in each “material first-tier foreign subsidiary” (as defined in the Pledge Agreement).

The Amended Credit Agreement contains usual and customary representations and warranties; affirmative and negative covenants, which include limitations on liens, investments, additional indebtedness, and restricted payments; and two quarterly financial covenants as follows: (i) a maximum Consolidated Leverage Ratio (defined as the ratio of debt to consolidated EBITDA) ranging from 3.50 to 1.00 to 4.00 to 1.00, depending on the measurement period, and (ii) a minimum Consolidated Interest Coverage Ratio (defined as the ratio of consolidated EBITDA to interest) of 3.50 to 1.00. Consolidated EBITDA for purposes of the financial covenants is calculated on a continuing operations basis and includes adjustments to add back non-cash goodwill impairment charges, share-based compensation costs, certain non-cash restructuring charges, pro forma historical EBITDA for businesses acquired, and other specified items in accordance with the Amended Credit Agreement. At June 30, 2019, we were in compliance with these financial covenants with a Consolidated Leverage Ratio of 2.63 to 1.00 and a Consolidated Interest Coverage Ratio of 13.82 to 1.00.

Borrowings outstanding under the Amended Credit Agreement at June 30, 2019 totaled $56.0 million. These borrowings carried a weighted average interest rate of 3.9%, including the effect of the interest rate swap described in Note 10 “Derivative Instrument and Hedging Activity." Borrowings outstanding under the Amended Credit Agreement at December 31, 2018 were $50.0 million and carried a weighted average interest rate of 3.7%, including the effect of the interest rate swap described in Note 10 “Derivative Instrument and Hedging Activity." The borrowing capacity under the revolving credit facility is reduced by any outstanding borrowings under the revolving credit facility and outstanding letters of credit. At June 30, 2019, we had outstanding letters of credit totaling $1.6 million, which are primarily used as security deposits for our office facilities. As of June 30, 2019, the unused borrowing capacity under the revolving credit facility was $442.4 million.

Promissory Note due 2024

On June 30, 2017, in conjunction with our purchase of an aircraft related to the acquisition of Innosight, we assumed, from the sellers of the aircraft, a promissory note with an outstanding principal balance of $5.1 million. The principal balance of the promissory note is subject to scheduled monthly principal payments until the maturity date of March 1, 2024, at which time a final payment of $1.5 million, plus any accrued and unpaid interest, will be due. Under the terms of the promissory note, we will pay interest on the outstanding principal amount at a rate of one month LIBOR plus 1.97% per annum. The obligations under the promissory note are secured pursuant to a Loan and Aircraft Security Agreement with Banc of America Leasing & Capital, LLC, which grants the lender a first priority security interest in the aircraft. At June 30, 2019, the outstanding principal amount of the promissory note was $4.1 million, and the aircraft had a carrying amount of $5.4 million. At December 31, 2018, the outstanding principal amount of the promissory note was $4.4 million, and the aircraft had a carrying amount of $5.8 million.

Restructuring Charges

6 Months Ended

Jun. 30, 2019

Restructuring and Related Activities [Abstract]

Restructuring Charges

Restructuring charges for the three and six months ended June 30, 2019 were $0.8 million and $2.0 million, respectively. During the second quarter of 2019, we exited the remaining portion of our Middleton, Wisconsin office and an office space in Houston, Texas, resulting in restructuring charges of $0.4 million and $0.1 million, respectively, which primarily consisted of accelerated depreciation on furniture and fixtures in those offices. Additionally, we recognized a $0.2 million restructuring charge in the second quarter of 2019 related to workforce

reductions as we continue to better align resources with market demand. During the first quarter of 2019, we exited a portion of our Lake Oswego, Oregon corporate office resulting in a $0.7 million lease impairment charge on the operating lease right-of-use asset and leasehold improvements and $0.2 million of accelerated depreciation on furniture and fixtures in that office. The lease impairment charge was recognized in accordance with ASC 842, Leases, which we adopted on a modified retrospective basis on January 1, 2019. See Note 2 "Basis of Presentation and Significant Accounting Policies" and Note 3 "New Accounting Pronouncements" for additional information on our adoption of ASC 842. See Note 5 "Leases" for additional information on the long-lived asset impairment test. Additionally, we recognized a $0.2 million restructuring charge in the first quarter of 2019 related to workforce reductions in our corporate operations.

Restructuring charges for the three and six months ended June 30, 2018 were $2.0 million and $2.7 million, respectively. Of the $2.0 million charge incurred in the second quarter of 2018, $1.0 million related to workforce reductions to better align resources with market demand; $0.7 million related to the accrual of remaining lease payments, net of estimated sublease income, and accelerated depreciation on leasehold improvements due to exiting a portion of our Middleton, Wisconsin office in the second quarter of 2018, which was accounted for in accordance with ASC 840, Leases; and $0.3 million related to the divestiture of our Middle East practice within the Business Advisory segment. During the first quarter of 2018, we recognized a $0.6 million restructuring charge related to updated lease assumptions for our San Francisco office vacated in the third quarter of 2017.

The table below sets forth the changes in the carrying amount of our restructuring charge liability by restructuring type for the six months ended June 30, 2019.



	Employee Costs			Office Space Reductions			Total
Balance as of December 31, 2018	$	443		$	2,468		$	2,911
Adoption of ASC 842 ⁽¹⁾	—			(1,119		)	(1,119		)
Balance as of January 1, 2019	443			1,349			1,792
Additions ⁽²⁾	429			65			494
Payments	(784		)	(442		)	(1,226		)
Adjustments⁽²⁾	(5		)	38			33
Balance as of June 30, 2019	$	83		$	1,010		$	1,093


(1)	Upon adoption of ASC 842 on January 1, 2019, we reclassified the restructuring charge liabilities, which represented the present value of remaining lease payments, net of estimated sublease income, for vacated office spaces from restructuring charge liabilities to operating lease right-of-use assets. See Note 3 "New Accounting Pronouncements" for additional information on the impact of adoption.


(2)	Additions and adjustments exclude non-cash items related to vacated office spaces, such as lease impairment charges and accelerated depreciation on fixed assets, which are recorded as restructuring charges on our consolidated statements of operations.

As of June 30, 2019, our restructuring charge liability related to office space reductions of $1.0 million represented the present value of the remaining estimated operating expense payments for vacated office spaces, primarily in Chicago, Illinois; Washington, D.C.; and Middleton, Wisconsin. This restructuring charge liability is included as a component of accrued expenses and other current liabilities and deferred compensation and other liabilities. The $0.1 million restructuring charge liability related to employee costs at June 30, 2019 is expected to be paid in the next 12 months. The restructuring charge liability related to employee costs is included as a component of accrued payroll and related benefits.

Derivative Instruments and Hedging Activity

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activity

Derivative Instrument and Hedging Activity

On June 22, 2017, we entered into a forward interest rate swap agreement effective August 31, 2017 and ending August 31, 2022, with a notional amount of $50.0 million. We entered into this derivative instrument to hedge against the interest rate risks of our variable-rate borrowings. Under the terms of the interest rate swap agreement, we receive from the counterparty interest on the notional amount based on one month LIBOR and we pay to the counterparty a fixed rate of 1.900%.

We recognize all derivative instruments as either assets or liabilities at fair value on the balance sheet. We have designated this derivative instrument as a cash flow hedge. Therefore, changes in the fair value of the derivative instrument are recorded to other comprehensive income (“OCI”) and reclassified into interest expense upon settlement. As of June 30, 2019, it was anticipated that an immaterial amount of the losses, net of tax, currently recorded in accumulated other comprehensive income will be reclassified into earnings within the next 12 months.

The table below sets forth additional information relating to the interest rate swap designated as a cash flow hedging instrument as of June 30, 2019 and December 31, 2018.



	Fair Value (Derivative Asset and Liability)
Balance Sheet Location	June 30, 2019		December 31, 2018
Prepaid expenses and other current assets	$	—	$	302
Other non-current assets	$	—	$	451
Accrued expenses and other current liabilities	$	16	$	—
Deferred compensation and other liabilities	$	383	$	—

All of our derivative instruments are transacted under the International Swaps and Derivatives Association (ISDA) master agreements. These agreements permit the net settlement of amounts owed in the event of default and certain other termination events. Although netting is permitted, it is our policy to record all derivative assets and liabilities on a gross basis on our consolidated balance sheet.

We do not use derivative instruments for trading or other speculative purposes. Refer to Note 12 “Other Comprehensive Income (Loss)” for additional information on our derivative instrument.

Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Certain of our assets and liabilities are measured at fair value. Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. GAAP establishes a fair value hierarchy for inputs used in measuring fair value and requires companies to maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy consists of three levels based on the objectivity of the inputs as follows:



Level 1 Inputs		Quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

Level 2 Inputs		Quoted prices in active markets for similar assets or liabilities; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability; or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

Level 3 Inputs		Unobservable inputs for the asset or liability, and include situations in which there is little, if any, market activity for the asset or liability.

The table below sets forth our fair value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018.



	Level 1		Level 2		Level 3		Total
June 30, 2019
Assets:
Convertible debt investment	$	—	$	—	$	59,357	$	59,357
Deferred compensation assets	—		25,066		—		25,066
Total assets	$	—	$	25,066	$	59,357	$	84,423
Liabilities:
Contingent consideration for business acquisitions	$	—	$	—	$	630	$	630
Interest rate swap	—		399		—		399
Total liabilities	$	—	$	399	$	630	$	1,029
December 31, 2018
Assets:
Interest rate swap	$	—	$	753	$	—	$	753
Convertible debt investment	—		—		50,429		50,429
Deferred compensation assets	—		18,205		—		18,205
Total assets	$	—	$	18,958	$	50,429	$	69,387
Liabilities:
Contingent consideration for business acquisitions	$	—	$	—	$	11,441	$	11,441
Total liabilities	$	—	$	—	$	11,441	$	11,441

Interest rate swap: The fair value of our interest rate swap was derived using estimates to settle the interest rate swap agreement, which is based on the net present value of expected future cash flows on each leg of the swap utilizing market-based inputs and a discount rate reflecting the risks involved.

Convertible debt investment: In 2014 and 2015, we invested $27.9 million, in the form of zero coupon convertible debt, in Shorelight Holdings, LLC (“Shorelight”), the parent company of Shorelight Education, a U.S.-based company that partners with leading universities to increase access to and retention of international students, boost institutional growth, and enhance an institution’s global footprint. In the second quarter of 2019, we amended the convertible notes to extend the maturity date by one year. The notes will mature on July 1, 2021, unless converted earlier.

To determine the appropriate accounting treatment for our investment, we performed a variable interest entity (“VIE”) analysis and concluded that Shorelight does not meet the definition of a VIE. We also reviewed the characteristics of our investment to confirm that the convertible notes are not in-substance common stock that would warrant equity method accounting. After we reviewed all of the terms of the investment, we concluded the appropriate accounting treatment to be that of an available-for-sale debt security.

The convertible debt investment is carried at fair value with unrealized holding gains and losses excluded from earnings and reported in other comprehensive income. We estimate the fair value of our investment using a Monte Carlo simulation model, cash flow projections discounted at a risk-adjusted rate, and certain assumptions related to equity volatility and applicable holding period, all of which are Level 3 inputs. The use of alternative estimates and assumptions could increase or decrease the estimated fair value of the investment, which would result in different impacts to our consolidated balance sheet and comprehensive income. Actual results may differ from our estimates. The fair value of the convertible debt investment is recorded in long-term investment on our consolidated balance sheets.

The table below sets forth the changes in the balance of the convertible debt investment for the six months ended June 30, 2019.



	Convertible Debt Investment
Balance as of December 31, 2018	$	50,429
Change in fair value of convertible debt investment	8,928
Balance as of June 30, 2019	$	59,357

Deferred compensation assets: We have a non-qualified deferred compensation plan (the "Plan") for the members of our board of directors and a select group of our employees. The deferred compensation liability is funded by the Plan assets, which consist of life insurance policies

maintained within a trust. The cash surrender value of the life insurance policies approximates fair value and is based on third-party broker statements which provide the fair value of the life insurance policies' underlying investments, which are Level 2 inputs. The cash surrender value of the life insurance policies is invested primarily in mutual funds. The Plan assets are included in other non-current assets on our consolidated balance sheets. Realized and unrealized gains (losses) from the deferred compensation assets are recorded to other income (expense), net in our consolidated statements of operations.

Contingent consideration for business acquisitions: We estimate the fair value of acquisition-related contingent consideration using either a probability-weighted assessment of the specific financial performance targets being achieved or a Monte Carlo simulation model, as appropriate. These fair value measurements are based on significant inputs not observable in the market and thus represent Level 3 inputs. The significant unobservable inputs used in the fair value measurements of our contingent consideration are our measures of the estimated payouts based on internally generated financial projections on a probability-weighted basis and discount rates, which typically reflect a risk-free rate. The fair value of the contingent consideration is reassessed quarterly based on assumptions used in our latest projections and input provided by practice leaders and management. Any change in the fair value estimate is recorded in our consolidated statement of operations for that period. The use of alternative estimates and assumptions could increase or decrease the estimated fair value of our contingent consideration liability, which would result in different impacts to our consolidated balance sheets and consolidated statements of operations. Actual results may differ from our estimates. The table below sets forth the changes in the balance of the contingent consideration for business acquisitions for the six months ended June 30, 2019.



	Contingent Consideration for Business Acquisitions
Balance as of December 31, 2018	$	11,441
Payments	(10,041		)
Remeasurement of contingent consideration for business acquisitions	(876		)
Unrealized loss due to foreign currency translation	106
Balance as of June 30, 2019	$	630

Financial assets and liabilities not recorded at fair value are as follows:

Senior Secured Credit Facility

The carrying value of our borrowings outstanding under our senior secured credit facility is stated at cost. Our carrying value approximates fair value, using Level 2 inputs, as the senior secured credit facility bears interest at variable rates based on current market rates as set forth in the Amended Credit Agreement. Refer to Note 8 “Financing Arrangements” for additional information on our senior secured credit facility.

Promissory Note due 2024

The carrying value of our promissory note due 2024 is stated at cost. Our carrying value approximates fair value, using Level 2 inputs, as the promissory note bears interest at rates based on current market rates as set forth in the terms of the promissory note. Refer to Note 8 “Financing Arrangements” for additional information on our promissory note due 2024.

Convertible Notes

The carrying amount and estimated fair value of the Convertible Notes are as follows:



	June 30, 2019				December 31, 2018
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
1.25% convertible senior notes due 2019	$	247,512	$	247,683	$	242,617	$	242,940

The differences between the $250 million principal amount of the Convertible Notes and the carrying amounts shown above represent the unamortized debt discount and issuance costs. As of June 30, 2019, and December 31, 2018, the carrying value of the equity component of $39.3 million was unchanged from the date of issuance. Refer to Note 8 “Financing Arrangements” for additional information on our Convertible Notes. The estimated fair value of the Convertible Notes was determined based on the quoted bid price of the Convertible Notes in an over-the-counter market, which is a Level 2 input, on the last day of trading for the quarters ended June 30, 2019 and December 31, 2018.

Based on the closing price of our common stock of $50.38 on June 30, 2019, the if-converted value of the Convertible Notes was less than the principal amount.

Cash and cash equivalents are stated at cost, which approximates fair market value. The carrying values of all other financial instruments not described above reasonably approximate fair market value due to the nature of the financial instruments and the short-term maturity of these items.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Other Comprehensive Income (Loss)

The table below sets forth the components of other comprehensive income (loss), net of tax, for the three and six months ended June 30, 2019 and 2018.



	Three Months Ended June 30, 2019									Three Months Ended June 30, 2018
	Before Taxes			Tax (Expense) Benefit			Net of Taxes			Before Taxes			Tax (Expense) Benefit			Net of Taxes
Other comprehensive income (loss):
Foreign currency translation adjustments	$	(359	)	$	—		$	(359	)	$	(954	)	$	—		$	(954	)
Unrealized gain on investment	$	5,319		$	(1,404	)	$	3,915		$	4,268		$	(1,109	)	$	3,159
Unrealized gain (loss) on cash flow hedges:
Change in fair value	$	(759	)	$	201		$	(558	)	$	250		$	(66	)	$	184
Reclassification adjustments into earnings	(72		)	18			(54		)	(2		)	1			(1		)
Net unrealized gain (loss)	$	(831	)	$	219		$	(612	)	$	248		$	(65	)	$	183
Other comprehensive income	$	4,129		$	(1,185	)	$	2,944		$	3,562		$	(1,174	)	$	2,388



	Six Months Ended June 30, 2019									Six Months Ended June 30, 2018
	Before Taxes			Tax (Expense) Benefit			Net of Taxes			Before Taxes			Tax (Expense) Benefit			Net of Taxes
Other comprehensive income (loss):
Foreign currency translation adjustments	$	(43	)	$	—		$	(43	)	$	(920	)	$	—		$	(920	)
Unrealized gain (loss) on investment	$	8,928		$	(2,356	)	$	6,572		$	7,195		$	(1,870	)	$	5,325
Unrealized gain (loss) on cash flow hedges:
Change in fair value	$	(1,006	)	$	266		$	(740	)	$	795		$	(207	)	$	588
Reclassification adjustments into earnings	(146		)	37			(109		)	36			(9		)	27
Net unrealized gain (loss)	$	(1,152	)	$	303		$	(849	)	$	831		$	(216	)	$	615
Other comprehensive income	$	7,733		$	(2,053	)	$	5,680		$	7,106		$	(2,086	)	$	5,020

The before tax amounts reclassified from accumulated other comprehensive income related to our cash flow hedges are recorded to interest expense, net of interest income.

Accumulated other comprehensive income, net of tax, includes the following components:



	Foreign Currency Translation			Available-for-Sale Investment		Cash Flow Hedges			Total
Balance, December 31, 2018	$	(665	)	$	16,584	$	576		$	16,495
Current period change	(43		)	6,572		(849		)	5,680
Balance, June 30, 2019	$	(708	)	$	23,156	$	(273	)	$	22,175

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended June 30, 2019, our effective tax rate was 24.8% as we recognized income tax expense from continuing operations of $3.5 million on income from continuing operations of $14.0 million. The effective tax rate of 24.8% was more favorable than the statutory rate, inclusive of state income taxes, of 26.4% primarily due to non-taxable gains on our investments used to fund our deferred compensation liability and federal tax credits, partially offset by non-deductible business expenses. For the three months ended June 30, 2018, our effective tax rate was 30.4% as we recognized income tax expense from continuing operations of $2.6 million on income from continuing operations of $8.4 million. The effective tax rate of 30.4% was less favorable than the statutory rate, inclusive of state income taxes, of 26.0% primarily due to non-deductible business expenses. For the six months ended June 30, 2019, our effective tax rate was 25.8% as we recognized income tax expense from continuing operations of $4.8 million on income from continuing operations of $18.8 million. The effective tax rate of 25.8% was more favorable than the statutory rate, inclusive of state income taxes, of 26.4% primarily due to non-taxable gains on our investments used to fund our deferred compensation liability, federal tax credits and share-based compensation awards that vested during the year; partially offset by non-deductible business expenses. For the six months ended June 30, 2018, our effective tax rate was 53.0% as we recognized income tax expense from continuing operations of $3.0 million on income from continuing operations of $5.6 million. The effective tax rate of 53.0% was less favorable than the statutory rate, inclusive of state income taxes, of 26.0% primarily due to discrete tax expense for share-based compensation awards that vested during the first quarter of 2018, which had an unfavorable impact of 22.5% on the effective tax rate, and non-deductible business expenses. As of June 30, 2019, we had $0.8 million of unrecognized tax benefits which would affect the effective tax rate of continuing operations if recognized.

Commitments, Contingencies and Guarantees	6 Months Ended
Commitments, Contingencies and Guarantees	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Litigation During the second quarter of 2018, we reached a settlement agreement related to Huron's claim in a class action lawsuit, resulting in a gain of $2.5 million. We collected the $2.5 million cash settlement during the second quarter of 2018. From time to time, we are involved in legal proceedings and litigation arising in the ordinary course of business. As of the date of this Quarterly Report on Form 10-Q, we are not a party to any litigation or legal proceeding that, in the current opinion of management, could have a material adverse effect on our financial position or results of operations. However, due to the risks and uncertainties inherent in legal proceedings, actual results could differ from current expected results. Guarantees Guarantees in the form of letters of credit totaling $1.6 million were outstanding at both June 30, 2019 and December 31, 2018, primarily to support certain office lease obligations. In connection with certain business acquisitions, we may be required to pay post-closing consideration to the sellers if specific financial performance targets are met over a number of years as specified in the related purchase agreements. As of June 30, 2019 and December 31, 2018, the total estimated fair value of our contingent consideration liabilities was $0.6 million and $11.4 million, respectively. To the extent permitted by law, our bylaws and articles of incorporation require that we indemnify our officers and directors against judgments, fines and amounts paid in settlement, including attorneys’ fees, incurred in connection with civil or criminal action or proceedings, as it relates to their services to us if such person acted in good faith. Although there is no limit on the amount of indemnification, we may have recourse against our insurance carrier for certain payments made.

Segment Information

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Segment Information

Segments are defined as components of a company that engage in business activities from which they may earn revenues and incur expenses, and for which separate financial information is available and is evaluated regularly by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. Our chief operating decision maker, who is our chief executive officer, manages the business under three operating segments, which are our reportable segments: Healthcare, Business Advisory, and Education.


•	Healthcare

Our Healthcare segment has a depth of expertise in care transformation, financial and operational excellence, technology and analytics, and leadership development. We serve national and regional hospitals and integrated health systems, academic medical centers, community hospitals, and medical groups. Our solutions help clients evolve and adapt to the rapidly changing healthcare environment and achieve growth, optimize performance, enhance profitability, improve quality and clinical outcomes, align leaders, improve organizational culture, and drive physician, patient, and employee engagement across the enterprise to deliver better consumer outcomes.

We help organizations transform and innovate their delivery model to focus on patient wellness by improving quality outcomes, minimizing care variation and fundamentally improving patient and population health. Our consultants partner with clients to help build and sustain today’s business to invest in the future by reducing complexity, improving operational efficiency and growing market share. We enable the healthcare of the future by identifying, integrating and optimizing technology investments to collect data that transforms care delivery and improves patient outcomes. We also develop future leaders capable of driving meaningful operational and organizational change and who transform the consumer experience.


•	Business Advisory

Our Business Advisory segment provides services to large and middle market organizations, not-for-profit organizations, lending institutions, law firms, investment banks and private equity firms. We assist clients in a broad range of industries and across the spectrum from healthy, well-capitalized companies to organizations in transition, as well as creditors, equity owners, and other key constituents. Our Business Advisory professionals resolve complex business issues and enhance client enterprise value through a suite of services including capital advisory, transaction advisory, operational improvement, restructuring and turnaround, valuation, and dispute advisory. Our Enterprise Solutions and Analytics professionals deliver technology and analytic solutions that enable organizations to manage and optimize their financial performance, operational efficiency, and client or stakeholder experience. Our Strategy and Innovation professionals collaborate with clients across a range of industries to identify new growth opportunities, build new ventures and capabilities, and accelerate organizational change. Our Life Sciences professionals provide strategic solutions to help pharmaceutical, medical device, and biotechnology companies deliver more value to patients, payers, and providers, and comply with regulations.


•	Education

Our Education segment provides consulting and technology solutions to higher education institutions and academic medical centers. We partner with clients to address challenges relating to business and technology strategy, financial management, operational and organizational effectiveness, research administration, and regulatory compliance. Our institutional strategy, market research, budgeting and financial management, business operations and student life cycle management solutions align missions with business priorities, improve quality and reduce costs institution-wide. Our student solutions improve attraction, retention and graduation rates, increase student satisfaction and help generate quality outcomes. Our technology strategy, enterprise applications, and analytic solutions transform and optimize operations, deliver time and cost savings, and enhance the student experience. Our research enterprise solutions assist clients in identifying and implementing institutional research strategy, optimizing clinical research operations, improving financial management and cost reimbursement, improving service to faculty, and mitigating risk compliance.

Segment operating income consists of the revenues generated by a segment, less the direct costs of revenue and selling, general and administrative expenses that are incurred directly by the segment. Unallocated corporate costs include costs related to administrative functions that are performed in a centralized manner that are not attributable to a particular segment. These administrative function costs include costs for corporate office support, certain office facility costs, costs relating to accounting and finance, human resources, legal, marketing, information technology, and company-wide business development functions, as well as costs related to overall corporate management.

The table below sets forth information about our operating segments for the three and six months ended June 30, 2019 and 2018, along with the items necessary to reconcile the segment information to the totals reported in the accompanying consolidated financial statements.



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Healthcare:
Revenues	$	101,939		$	91,500		$	195,621		$	181,395
Operating income	$	33,344		$	27,072		$	61,195		$	51,532
Segment operating income as a percentage of segment revenues	32.7		%	29.6		%	31.3		%	28.4		%
Business Advisory:
Revenues	$	62,277		$	57,720		$	121,083		$	113,615
Operating income	$	11,474		$	14,218		$	21,055		$	23,216
Segment operating income as a percentage of segment revenues	18.4		%	24.6		%	17.4		%	20.4		%
Education:
Revenues	$	56,538		$	48,324		$	108,495		$	96,213
Operating income	$	16,204		$	11,255		$	28,822		$	22,680
Segment operating income as a percentage of segment revenues	28.7		%	23.3		%	26.6		%	23.6		%
Total Company:
Revenues	$	220,754		$	197,544		$	425,199		$	391,223
Reimbursable expenses	23,534			20,733			42,151			38,352
Total revenues and reimbursable expenses	$	244,288		$	218,277		$	467,350		$	429,575

Segment operating income	$	61,022		$	52,545		$	111,072		$	97,428
Items not allocated at the segment level:
Other operating expenses	36,481			31,197			73,059			64,125
Litigation and other gains, net	(485		)	(6,707		)	(941		)	(5,877		)
Depreciation and amortization	7,151			8,917			14,323			17,720
Other expense, net	3,829			10,715			5,870			15,846
Income from continuing operations before taxes	$	14,046		$	8,423		$	18,761		$	5,614

The following table illustrates the disaggregation of revenues by billing arrangements, employee types, and timing of revenue recognition, including a reconciliation of the disaggregated revenues to revenues from our three operating segments for the three and six months ended June 30, 2019 and 2018.



	Three Months Ended June 30, 2019
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	59,681	$	26,688	$	13,125	$	99,494
Time and expense	14,275		33,804		39,076		87,155
Performance-based	22,021		532		—		22,553
Software support, maintenance and subscriptions	5,962		1,253		4,337		11,552
Total	$	101,939	$	62,277	$	56,538	$	220,754

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	69,548	$	60,054	$	49,403	$	179,005
Revenue generated by full-time equivalents	32,391		2,223		7,135		41,749
Total	$	101,939	$	62,277	$	56,538	$	220,754

Timing of Revenue Recognition
Revenue recognized over time	$	99,606	$	62,277	$	56,179	$	218,062
Revenue recognized at a point in time	2,333		—		359		2,692
Total	$	101,939	$	62,277	$	56,538	$	220,754



	Six Months Ended June 30, 2019
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	123,265	$	48,360	$	25,508	$	197,133
Time and expense	27,038		69,113		74,434		170,585
Performance-based	33,831		1,196		—		35,027
Software support, maintenance and subscriptions	11,487		2,414		8,553		22,454
Total	$	195,621	$	121,083	$	108,495	$	425,199

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	134,366	$	117,148	$	95,410	$	346,924
Revenue generated by full-time equivalents	61,255		3,935		13,085		78,275
Total	$	195,621	$	121,083	$	108,495	$	425,199

Timing of Revenue Recognition
Revenue recognized over time	$	191,248	$	121,083	$	107,890	$	420,221
Revenue recognized at a point in time	4,373		—		605		4,978
Total	$	195,621	$	121,083	$	108,495	$	425,199



	Three Months Ended June 30, 2018
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	61,760	$	23,554	$	8,134	$	93,448
Time and expense	14,243		30,823		36,923		81,989
Performance-based	9,213		2,268		—		11,481
Software support, maintenance and subscriptions	6,284		1,075		3,267		10,626
Total	$	91,500	$	57,720	$	48,324	$	197,544

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	62,138	$	54,769	$	41,905	$	158,812
Revenue generated by full-time equivalents	29,362		2,951		6,419		38,732
Total	$	91,500	$	57,720	$	48,324	$	197,544

Timing of Revenue Recognition
Revenue recognized over time	$	89,607	$	57,720	$	47,429	$	194,756
Revenue recognized at a point in time	1,893		—		895		2,788
Total	$	91,500	$	57,720	$	48,324	$	197,544



	Six Months Ended June 30, 2018
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	122,029	$	45,974	$	19,440	$	187,443
Time and expense	27,032		62,160		70,365		159,557
Performance-based	19,404		3,177		—		22,581
Software support, maintenance and subscriptions	12,930		2,304		6,408		21,642
Total	$	181,395	$	113,615	$	96,213	$	391,223

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	121,411	$	108,185	$	83,537	$	313,133
Revenue generated by full-time equivalents	59,984		5,430		12,676		78,090
Total	$	181,395	$	113,615	$	96,213	$	391,223

Timing of Revenue Recognition
Revenue recognized over time	$	177,948	$	113,615	$	94,014	$	385,577
Revenue recognized at a point in time	3,447		—		2,199		5,646
Total	$	181,395	$	113,615	$	96,213	$	391,223

(1)

Full-time billable consultants consist of our full-time professionals who provide consulting services to our clients and are billable to our clients based on the number of hours worked. Full-time equivalent professionals consist of leadership coaches and their support staff within our Healthcare Leadership solution, consultants who work variable schedules as needed by our clients, and full-time employees who provide software support and maintenance services to our clients.

At June 30, 2019, one client in our Healthcare segment had a total receivable and unbilled services balance that accounted for 11.1% of our combined balance of receivables from clients, net and unbilled services, net. The outstanding balance for this client is the result of services performed in advance of the contractual billing schedule. At December 31, 2018, no single client accounted for greater than 10% of our combined balance of receivables from clients, net and unbilled services, net. During the three and six months ended June 30, 2019 and 2018, no single client generated greater than 10% of our consolidated revenues.

Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

The accompanying unaudited consolidated financial statements reflect the financial position, results of operations, and cash flows as of and for the three and six months ended June 30, 2019 and 2018. These financial statements have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for Quarterly Reports on Form 10-Q. Accordingly, these financial statements do not include all of the information and note disclosures required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. In the opinion of management, these financial statements reflect all adjustments of a normal, recurring nature necessary for the fair statement of our financial position, results of operations, and cash flows for the interim periods presented in conformity with GAAP. These financial statements should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2018 included in our Annual Report on Form 10-K and our Quarterly Report on Form 10-Q for the period ended March 31, 2019. Our results for any interim period are not necessarily indicative of results for a full year or any other interim period.

Earnings Per Share, Policy

Convertible Senior Notes, Policy

Derivatives and Hedging, Policy

Fair Value of Financial Instruments, Policy

Fair value is defined as the price that would be received to sell an asset or the price that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. GAAP establishes a fair value hierarchy for inputs used in measuring fair value and requires companies to maximize the use of observable inputs and minimize the use of unobservable inputs. The fair value hierarchy consists of three levels based on the objectivity of the inputs as follows:



Level 1 Inputs		Quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

Level 2 Inputs		Quoted prices in active markets for similar assets or liabilities; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability; or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

Level 3 Inputs		Unobservable inputs for the asset or liability, and include situations in which there is little, if any, market activity for the asset or liability.

Segment Reporting, Policy

Lessee, Leases, Policy

We determine if an arrangement contains a lease and the classification of such lease at inception. As of June 30, 2019, all of our material leases are classified as operating leases; we have not entered into any material finance leases. For all operating leases with an initial term greater than 12 months, we recognize an operating lease right-of-use ("ROU") asset and operating lease liability. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term.

Operating lease ROU assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date and provided by the administrative agent for our senior secured credit facility, in determining the present value of lease payments. Operating lease ROU assets exclude lease incentives.

Certain lease agreements contain variable lease payments that do not depend on an index or rate. These variable lease payments are not included in the calculation of the operating lease ROU asset and operating lease liability; instead, they are expensed as incurred. Certain lease agreements contain lease and nonlease components, which are accounted for separately. We separate the contract consideration between lease and nonlease components based on the relative standalone price of each component. Our leases may contain options to extend or terminate the lease, and we include these terms in our calculation of the operating lease ROU asset and operating lease liability when it is reasonably certain that we will exercise the option.

Operating lease expense is recognized on a straight-line basis over the lease term and recorded within selling, general and administrative expenses on our consolidated statement of operations. In accordance with our accounting policy for impairment of long-lived assets, operating lease ROU assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset group to which the operating lease ROU asset is assigned may not be recoverable. We evaluate the recoverability of the asset group based on forecasted undiscounted cash flows.

New Accounting Pronouncements New Accounting Pronouncements (Tables)

6 Months Ended

Jun. 30, 2019

New Accounting Pronouncements [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The impact of the new lease standard on our consolidated balance sheet upon adoption follows:



	As of December 31, 2018		ASC 842 Adjustment			As of January 1, 2019
Assets
Operating lease right-of-use assets	$	—	$	56,463		$	56,463

Liabilities
Accrued expenses and other current liabilities	$	17,207	$	(2,557	)	$	14,650
Current maturities of operating lease liabilities	$	—	$	10,537		$	10,537
Deferred compensation and other liabilities	$	20,875	$	(536	)	$	20,339
Deferred lease incentives	$	13,693	$	(13,693	)	$	—
Operating lease liabilities, net of current portion	$	—	$	62,712		$	62,712

Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The table below sets forth the changes in the carrying amount of goodwill by reportable segment for the six months ended June 30, 2019.



	Healthcare			Business Advisory			Education		Total
Balance as of December 31, 2018:
Goodwill	$	636,810		$	301,700		$	102,829	$	1,041,339
Accumulated impairment losses	(208,081		)	(187,995		)	—		(396,076		)
Goodwill, net as of December 31, 2018	428,729			113,705			102,829		645,263
Foreign currency translation	—			3			—		3
Goodwill, net as of June 30, 2019	$	428,729		$	113,708		$	102,829	$	645,266

Intangible Assets

Intangible assets as of June 30, 2019 and December 31, 2018 consisted of the following:



		As of June 30, 2019				As of December 31, 2018
	Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	4 to 13	$	91,968	$	60,482	$	98,235	$	60,462
Trade names	5 to 6	28,930		24,537		28,930		23,181
Technology and software	3 to 5	5,694		3,581		5,694		2,842
Non-competition agreements	3 to 5	2,540		1,495		3,650		2,241
Favorable lease contract	3	—		—		720		646
Total		$	129,132	$	90,095	$	137,229	$	89,372

Schedule of Future Amortization Expense

The table below sets forth the estimated annual amortization expense for the year ending December 31, 2019 and each of the five succeeding years for the intangible assets recorded as of June 30, 2019.



Year Ending December 31,	Estimated Amortization Expense
2019	$	17,206
2020	$	12,083
2021	$	8,064
2022	$	6,090
2023	$	3,512
2024	$	741

Leases Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Schedule of Supplemental Balance Sheet Information for Operating Leases



Balance Sheet	June 30, 2019
Operating lease right-of-use assets	$	55,045

Current maturities of operating lease liabilities	$	10,536
Operating lease liabilities, net of current portion	62,130
Total lease liabilities	$	72,666

Lease, Cost



Lease Cost	Three Months Ended June 30, 2019			Six Months Ended June 30, 2019
Operating lease cost	$	3,055		$	6,055
Short-term leases ⁽¹⁾	128			175
Variable lease costs	301			675
Sublease income	(618		)	(1,235		)
Net lease cost ^(2)(3)(4)	$	2,866		$	5,670


(1)	Includes variable lease costs related to short-term leases.


(2)	Net lease cost includes $0.2 million for both the three and six months ended June 30, 2019 recorded as restructuring charges as they relate to vacated office spaces. See Note 9 "Restructuring Charges" for additional information on our vacated office spaces.


(3)	Net lease cost includes $0.1 million for both the three and six months ended June 30, 2019 related to vacated office spaces directly related to discontinued operations.

(4)

Rent expense, including operating expenses, real estate taxes and insurance, recorded under ASC 840 for the three and six months ended June 30, 2018 was $3.7 million and $7.6 million, respectively.

Lessee, Operating Lease, Liability, Maturity

The table below summarizes the remaining expected lease payments under our operating leases as of June 30, 2019 and December 31, 2018.



Future Lease Payments	June 30, 2019			December 31, 2018 ^{(1, 2)}
2019	$	6,851		$	13,701
2020	13,606			12,724
2021	12,536			11,590
2022	11,646			10,766
2023	11,622			10,707
Thereafter	28,747			27,033
Total operating lease payments	$	85,008		$	86,521
Less: imputed interest	(12,342		)	n/a
Present value of operating lease liabilities	$	72,666		n/a


(1)	The expected lease payments as of December 31, 2018 represent our future minimum rental commitments as defined by ASC 840.

(2)

As of December 31, 2018, the expected total future minimum sublease income to be received was $10.2 million

Schedule of Supplemental Operating Lease Information



Other Information	Six Months Ended June 30, 2019
Cash paid for operating lease liabilities	$	7,056
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	3,611

Weighted average remaining lease term - operating leases	6.7 years
Weighted average discount rate - operating leases	4.7		%

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share

Earnings (loss) per share under the basic and diluted computations are as follows:



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income from continuing operations	$	10,569		$	5,862		$	13,919		$	2,640
Loss from discontinued operations, net of tax	(97		)	(490		)	(143		)	(532		)
Net income	$	10,472		$	5,372		$	13,776		$	2,108

Weighted average common shares outstanding – basic	21,997			21,709			21,933			21,651
Weighted average common stock equivalents	403			209			423			215
Weighted average common shares outstanding – diluted	22,400			21,918			22,356			21,866

Net earnings per basic share:
Net income from continuing operations	$	0.48		$	0.27		$	0.63		$	0.12
Loss from discontinued operations, net of tax	—			(0.02		)	—			(0.02		)
Net income	$	0.48		$	0.25		$	0.63		$	0.10

Net earnings per diluted share:
Net income from continuing operations	$	0.47		$	0.27		$	0.62		$	0.12
Loss from discontinued operations, net of tax	—			(0.02		)	—			(0.02		)
Net income	$	0.47		$	0.25		$	0.62		$	0.10

Summary of Anti-dilutive Securities Excluded from Computation of Weighted Average Common Stock Equivalents

The number of anti-dilutive securities excluded from the computation of the weighted average common stock equivalents presented above were as follows:



	As of June 30,
	2019	2018
Unvested restricted stock awards	—	63
Outstanding common stock options	—	37
Convertible senior notes	3,129	3,129
Warrants related to the issuance of convertible senior notes	3,129	3,129
Total anti-dilutive securities	6,258	6,358

Financing Arrangements (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Summary of Carrying Amounts of Debt

A summary of the carrying amounts of our debt follows:



	June 30, 2019			December 31, 2018
1.25% convertible senior notes due 2019	$	247,512		$	242,617
Senior secured credit facility	56,000			50,000
Promissory note due 2024	4,112			4,368
Total long-term debt	$	307,624		$	296,985
Current maturities of long-term debt	(248,034		)	(243,132		)
Long-term debt, net of current portion	$	59,590		$	53,853

Schedule of Maturities of Long-term Debt

Below is a summary of the scheduled remaining principal payments of our debt as of June 30, 2019.



	Principal Payments of Long-Term Debt
2019	$	250,259
2020	$	529
2021	$	544
2022	$	559
2023	$	56,575
Thereafter	$	1,646

Schedule of Convertible Notes

As of June 30, 2019, and December 31, 2018, the Convertible Notes consisted of the following:



	June 30, 2019			December 31, 2018
Liability component:
Proceeds	$	250,000		$	250,000
Less: debt discount, net of amortization	(2,171		)	(6,436		)
Less: debt issuance costs, net of amortization	(317		)	(947		)
Net carrying amount	$	247,512		$	242,617
Equity component ⁽¹⁾	$	39,287		$	39,287

(1)Included in additional paid-in capital on the consolidated balance sheet.

Summary of Interest Expense Recognized

The following table presents the amount of interest expense recognized related to the Convertible Notes for the periods presented.



	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contractual interest coupon	$	781	$	781	$	1,563	$	1,563
Amortization of debt discount	2,145		2,047		4,265		4,068
Amortization of debt issuance costs	315		310		630		619
Total interest expense	$	3,241	$	3,138	$	6,458	$	6,250

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details

Restructuring Charges Restructuring Liability Rollforward (Tables)

6 Months Ended

Jun. 30, 2019

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Reserve by Type of Cost

The table below sets forth the changes in the carrying amount of our restructuring charge liability by restructuring type for the six months ended June 30, 2019.



	Employee Costs			Office Space Reductions			Total
Balance as of December 31, 2018	$	443		$	2,468		$	2,911
Adoption of ASC 842 ⁽¹⁾	—			(1,119		)	(1,119		)
Balance as of January 1, 2019	443			1,349			1,792
Additions ⁽²⁾	429			65			494
Payments	(784		)	(442		)	(1,226		)
Adjustments⁽²⁾	(5		)	38			33
Balance as of June 30, 2019	$	83		$	1,010		$	1,093


(1)	Upon adoption of ASC 842 on January 1, 2019, we reclassified the restructuring charge liabilities, which represented the present value of remaining lease payments, net of estimated sublease income, for vacated office spaces from restructuring charge liabilities to operating lease right-of-use assets. See Note 3 "New Accounting Pronouncements" for additional information on the impact of adoption.


(2)	Additions and adjustments exclude non-cash items related to vacated office spaces, such as lease impairment charges and accelerated depreciation on fixed assets, which are recorded as restructuring charges on our consolidated statements of operations.

Derivative Instruments and Hedging Activity (Tables)

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value Interest Rate Swaps Designated as Cash Flow Hedging Instruments

The table below sets forth additional information relating to the interest rate swap designated as a cash flow hedging instrument as of June 30, 2019 and December 31, 2018.



	Fair Value (Derivative Asset and Liability)
Balance Sheet Location	June 30, 2019		December 31, 2018
Prepaid expenses and other current assets	$	—	$	302
Other non-current assets	$	—	$	451
Accrued expenses and other current liabilities	$	16	$	—
Deferred compensation and other liabilities	$	383	$	—

Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The table below sets forth our fair value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2019 and December 31, 2018.



	Level 1		Level 2		Level 3		Total
June 30, 2019
Assets:
Convertible debt investment	$	—	$	—	$	59,357	$	59,357
Deferred compensation assets	—		25,066		—		25,066
Total assets	$	—	$	25,066	$	59,357	$	84,423
Liabilities:
Contingent consideration for business acquisitions	$	—	$	—	$	630	$	630
Interest rate swap	—		399		—		399
Total liabilities	$	—	$	399	$	630	$	1,029
December 31, 2018
Assets:
Interest rate swap	$	—	$	753	$	—	$	753
Convertible debt investment	—		—		50,429		50,429
Deferred compensation assets	—		18,205		—		18,205
Total assets	$	—	$	18,958	$	50,429	$	69,387
Liabilities:
Contingent consideration for business acquisitions	$	—	$	—	$	11,441	$	11,441
Total liabilities	$	—	$	—	$	11,441	$	11,441

Summary of Carrying Amount and Estimated Fair Value of Convertible Senior Notes

The carrying amount and estimated fair value of the Convertible Notes are as follows:



	June 30, 2019				December 31, 2018
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
1.25% convertible senior notes due 2019	$	247,512	$	247,683	$	242,617	$	242,940

Contingent consideration for business acquisitions

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The table below sets forth the changes in the balance of the contingent consideration for business acquisitions for the six months ended June 30, 2019.



	Contingent Consideration for Business Acquisitions
Balance as of December 31, 2018	$	11,441
Payments	(10,041		)
Remeasurement of contingent consideration for business acquisitions	(876		)
Unrealized loss due to foreign currency translation	106
Balance as of June 30, 2019	$	630

Convertible senior notes

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The table below sets forth the changes in the balance of the convertible debt investment for the six months ended June 30, 2019.



	Convertible Debt Investment
Balance as of December 31, 2018	$	50,429
Change in fair value of convertible debt investment	8,928
Balance as of June 30, 2019	$	59,357

Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Components of Other Comprehensive Income (Loss), Net of Tax

The table below sets forth the components of other comprehensive income (loss), net of tax, for the three and six months ended June 30, 2019 and 2018.



	Three Months Ended June 30, 2019									Three Months Ended June 30, 2018
	Before Taxes			Tax (Expense) Benefit			Net of Taxes			Before Taxes			Tax (Expense) Benefit			Net of Taxes
Other comprehensive income (loss):
Foreign currency translation adjustments	$	(359	)	$	—		$	(359	)	$	(954	)	$	—		$	(954	)
Unrealized gain on investment	$	5,319		$	(1,404	)	$	3,915		$	4,268		$	(1,109	)	$	3,159
Unrealized gain (loss) on cash flow hedges:
Change in fair value	$	(759	)	$	201		$	(558	)	$	250		$	(66	)	$	184
Reclassification adjustments into earnings	(72		)	18			(54		)	(2		)	1			(1		)
Net unrealized gain (loss)	$	(831	)	$	219		$	(612	)	$	248		$	(65	)	$	183
Other comprehensive income	$	4,129		$	(1,185	)	$	2,944		$	3,562		$	(1,174	)	$	2,388



	Six Months Ended June 30, 2019									Six Months Ended June 30, 2018
	Before Taxes			Tax (Expense) Benefit			Net of Taxes			Before Taxes			Tax (Expense) Benefit			Net of Taxes
Other comprehensive income (loss):
Foreign currency translation adjustments	$	(43	)	$	—		$	(43	)	$	(920	)	$	—		$	(920	)
Unrealized gain (loss) on investment	$	8,928		$	(2,356	)	$	6,572		$	7,195		$	(1,870	)	$	5,325
Unrealized gain (loss) on cash flow hedges:
Change in fair value	$	(1,006	)	$	266		$	(740	)	$	795		$	(207	)	$	588
Reclassification adjustments into earnings	(146		)	37			(109		)	36			(9		)	27
Net unrealized gain (loss)	$	(1,152	)	$	303		$	(849	)	$	831		$	(216	)	$	615
Other comprehensive income	$	7,733		$	(2,053	)	$	5,680		$	7,106		$	(2,086	)	$	5,020

Components of Accumulated Other Comprehensive Income (Loss), Net of Tax

Accumulated other comprehensive income, net of tax, includes the following components:



	Foreign Currency Translation			Available-for-Sale Investment		Cash Flow Hedges			Total
Balance, December 31, 2018	$	(665	)	$	16,584	$	576		$	16,495
Current period change	(43		)	6,572		(849		)	5,680
Balance, June 30, 2019	$	(708	)	$	23,156	$	(273	)	$	22,175

Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Components of Segment Information



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Healthcare:
Revenues	$	101,939		$	91,500		$	195,621		$	181,395
Operating income	$	33,344		$	27,072		$	61,195		$	51,532
Segment operating income as a percentage of segment revenues	32.7		%	29.6		%	31.3		%	28.4		%
Business Advisory:
Revenues	$	62,277		$	57,720		$	121,083		$	113,615
Operating income	$	11,474		$	14,218		$	21,055		$	23,216
Segment operating income as a percentage of segment revenues	18.4		%	24.6		%	17.4		%	20.4		%
Education:
Revenues	$	56,538		$	48,324		$	108,495		$	96,213
Operating income	$	16,204		$	11,255		$	28,822		$	22,680
Segment operating income as a percentage of segment revenues	28.7		%	23.3		%	26.6		%	23.6		%
Total Company:
Revenues	$	220,754		$	197,544		$	425,199		$	391,223
Reimbursable expenses	23,534			20,733			42,151			38,352
Total revenues and reimbursable expenses	$	244,288		$	218,277		$	467,350		$	429,575

Segment operating income	$	61,022		$	52,545		$	111,072		$	97,428
Items not allocated at the segment level:
Other operating expenses	36,481			31,197			73,059			64,125
Litigation and other gains, net	(485		)	(6,707		)	(941		)	(5,877		)
Depreciation and amortization	7,151			8,917			14,323			17,720
Other expense, net	3,829			10,715			5,870			15,846
Income from continuing operations before taxes	$	14,046		$	8,423		$	18,761		$	5,614

Disaggregation of Revenue



	Three Months Ended June 30, 2019
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	59,681	$	26,688	$	13,125	$	99,494
Time and expense	14,275		33,804		39,076		87,155
Performance-based	22,021		532		—		22,553
Software support, maintenance and subscriptions	5,962		1,253		4,337		11,552
Total	$	101,939	$	62,277	$	56,538	$	220,754

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	69,548	$	60,054	$	49,403	$	179,005
Revenue generated by full-time equivalents	32,391		2,223		7,135		41,749
Total	$	101,939	$	62,277	$	56,538	$	220,754

Timing of Revenue Recognition
Revenue recognized over time	$	99,606	$	62,277	$	56,179	$	218,062
Revenue recognized at a point in time	2,333		—		359		2,692
Total	$	101,939	$	62,277	$	56,538	$	220,754



	Six Months Ended June 30, 2019
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	123,265	$	48,360	$	25,508	$	197,133
Time and expense	27,038		69,113		74,434		170,585
Performance-based	33,831		1,196		—		35,027
Software support, maintenance and subscriptions	11,487		2,414		8,553		22,454
Total	$	195,621	$	121,083	$	108,495	$	425,199

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	134,366	$	117,148	$	95,410	$	346,924
Revenue generated by full-time equivalents	61,255		3,935		13,085		78,275
Total	$	195,621	$	121,083	$	108,495	$	425,199

Timing of Revenue Recognition
Revenue recognized over time	$	191,248	$	121,083	$	107,890	$	420,221
Revenue recognized at a point in time	4,373		—		605		4,978
Total	$	195,621	$	121,083	$	108,495	$	425,199



	Three Months Ended June 30, 2018
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	61,760	$	23,554	$	8,134	$	93,448
Time and expense	14,243		30,823		36,923		81,989
Performance-based	9,213		2,268		—		11,481
Software support, maintenance and subscriptions	6,284		1,075		3,267		10,626
Total	$	91,500	$	57,720	$	48,324	$	197,544

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	62,138	$	54,769	$	41,905	$	158,812
Revenue generated by full-time equivalents	29,362		2,951		6,419		38,732
Total	$	91,500	$	57,720	$	48,324	$	197,544

Timing of Revenue Recognition
Revenue recognized over time	$	89,607	$	57,720	$	47,429	$	194,756
Revenue recognized at a point in time	1,893		—		895		2,788
Total	$	91,500	$	57,720	$	48,324	$	197,544



	Six Months Ended June 30, 2018
	Healthcare		Business Advisory		Education		Total
Billing Arrangements
Fixed-fee	$	122,029	$	45,974	$	19,440	$	187,443
Time and expense	27,032		62,160		70,365		159,557
Performance-based	19,404		3,177		—		22,581
Software support, maintenance and subscriptions	12,930		2,304		6,408		21,642
Total	$	181,395	$	113,615	$	96,213	$	391,223

Employee Type ⁽¹⁾
Revenue generated by full-time billable consultants	$	121,411	$	108,185	$	83,537	$	313,133
Revenue generated by full-time equivalents	59,984		5,430		12,676		78,090
Total	$	181,395	$	113,615	$	96,213	$	391,223

Timing of Revenue Recognition
Revenue recognized over time	$	177,948	$	113,615	$	94,014	$	385,577
Revenue recognized at a point in time	3,447		—		2,199		5,646
Total	$	181,395	$	113,615	$	96,213	$	391,223

(1)

New Accounting Pronouncements Impact of Adoption - Balance Sheet (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset	$ 56,463	$ 55,045	$ 0
Operating Lease, Liability, Current	10,537	10,536	0
Deferred compensation and other liabilities	20,339	27,367	20,875
Operating lease liabilities, net of current portion	0	0	13,693
Operating Lease, Liability, Noncurrent	62,712	$ 62,130	$ 0
Operating lease right-of-use asset [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	56,463
Accrued Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(2,557)
Current maturities of operating lease liabilities [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	10,537
Other Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(536)
Deferred lease incentives [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(13,693)
Operating lease liabilities, net of current [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 62,712

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill		$ 1,041,339
Accumulated impairment losses		(396,076)
Goodwill [Roll Forward]
Goodwill, net beginning balance	$ 645,263
Goodwill, Foreign Currency Translation Gain (Loss)	3
Goodwill, net ending balance	645,266
Healthcare
Goodwill [Line Items]
Goodwill		636,810
Accumulated impairment losses		(208,081)
Goodwill [Roll Forward]
Goodwill, net beginning balance	428,729
Goodwill, Foreign Currency Translation Gain (Loss)	0
Goodwill, net ending balance	428,729
Education [Member]
Goodwill [Line Items]
Goodwill		102,829
Accumulated impairment losses		0
Goodwill [Roll Forward]
Goodwill, net beginning balance	102,829
Goodwill, Foreign Currency Translation Gain (Loss)	0
Goodwill, net ending balance	102,829
Business Advisory
Goodwill [Line Items]
Goodwill		301,700
Accumulated impairment losses		$ (187,995)
Goodwill [Roll Forward]
Goodwill, net beginning balance	113,705
Goodwill, Foreign Currency Translation Gain (Loss)	3
Goodwill, net ending balance	$ 113,708

Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Intangible assets
Gross Carrying Amount	$ 129,132	$ 137,229
Accumulated Amortization	90,095	89,372
Customer Relationships [Member]
Intangible assets
Gross Carrying Amount	91,968	98,235
Accumulated Amortization	$ 60,482	60,462
Customer Relationships [Member] \| Minimum
Intangible assets
Useful Life (in years)	4 years
Customer Relationships [Member] \| Maximum
Intangible assets
Useful Life (in years)	13 years
Trade Names [Member]
Intangible assets
Gross Carrying Amount	$ 28,930	28,930
Accumulated Amortization	$ 24,537	23,181
Trade Names [Member] \| Minimum
Intangible assets
Useful Life (in years)	5 years
Trade Names [Member] \| Maximum
Intangible assets
Useful Life (in years)	6 years
Technology And Software [Member]
Intangible assets
Gross Carrying Amount	$ 5,694	5,694
Accumulated Amortization	$ 3,581	2,842
Technology And Software [Member] \| Minimum
Intangible assets
Useful Life (in years)	3 years
Technology And Software [Member] \| Maximum
Intangible assets
Useful Life (in years)	5 years
Noncompete Agreements [Member]
Intangible assets
Gross Carrying Amount	$ 2,540	3,650
Accumulated Amortization	$ 1,495	2,241
Noncompete Agreements [Member] \| Minimum
Intangible assets
Useful Life (in years)	3 years
Noncompete Agreements [Member] \| Maximum
Intangible assets
Useful Life (in years)	5 years
Off-Market Favorable Lease [Member]
Intangible assets
Useful Life (in years)	3 years
Gross Carrying Amount	$ 0	720
Accumulated Amortization	$ 0	$ 646

Goodwill and Intangible Assets - Amortization Expense (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 17,206
Estimated annual intangible assets amortization expense, Year Two	12,083
Estimated annual intangible assets amortization expense, Year Three	8,064
Estimated annual intangible assets amortization expense, Year Four	6,090
Estimated annual intangible assets amortization expense, Year Five	3,512
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 741

Goodwill and Intangible Assets Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 4.3	$ 6.0	$ 8.8	$ 12.3

Leases Schedule of Operating Lease Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 55,045	$ 56,463	$ 0
Operating Lease, Liability, Current	10,536	10,537	0
Operating Lease, Liability, Noncurrent	62,130	$ 62,712	$ 0
Operating Lease, Liability	$ 72,666

Leases Schedule of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Leases [Abstract]
Restructuring Charges	$ 754	$ 1,984	$ 2,029	$ 2,696
Operating Lease, Cost	3,055		6,055
Short-term Lease, Cost	128		175
Variable Lease, Cost	301		675
Sublease Income	(618)		(1,235)
Lease, Cost	$ 2,866		$ 5,670

Leases Schedule of Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 6,851
Lessee, Operating Lease, Liability, Payments, Due Year Two	13,606
Lessee, Operating Lease, Liability, Payments, Due Year Three	12,536
Lessee, Operating Lease, Liability, Payments, Due Year Four	11,646
Lessee, Operating Lease, Liability, Payments, Due Year Five	11,622
Lessee, Operating Lease, Liability, Payments, Due after Year Five	28,747
Lessee, Operating Lease, Liability, Payments, Due	85,008
Imputed interest of lease liabilities	(12,342)
Operating Lease, Liability	$ 72,666
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ 13,701
Operating Leases, Future Minimum Payments, Due in Two Years		12,724
Operating Leases, Future Minimum Payments, Due in Three Years		11,590
Operating Leases, Future Minimum Payments, Due in Four Years		10,766
Operating Leases, Future Minimum Payments, Due in Five Years		10,707
Operating Leases, Future Minimum Payments, Due Thereafter		27,033
Operating Leases, Future Minimum Payments Due		$ 86,521

Leases Schedule of Operating Lease Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ 7,056
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 3,611
Operating Lease, Weighted Average Remaining Lease Term	6 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	4.70%

Leases Leases Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 2,866			$ 5,670
Operating Leases, Future Minimum Payments Receivable						$ 10,200
Operating Leases, Rent Expense, Net			$ 3,700		$ 7,600
Operating Lease, Impairment Loss		$ 700		$ 805	$ 0
Operating lease right-of-use asset [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Impairment Loss		600
Leasehold Improvements [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Impairment Loss		$ 200
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	1 year			1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	10 years			10 years
Restructuring Charges [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 200			$ 200
Discontinued Operations [Member] \| Huron Legal [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 100			$ 100

Revenues Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 220,754	$ 197,544	$ 425,199	$ 391,223
Total revenues and reimbursable expenses	244,288	218,277	467,350	429,575
Contract with Customer, Performance Obligation Satisfied in Previous Period		5,200		8,100
Revenue, Remaining Performance Obligation, Amount	65,100		65,100
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	29,800		29,800		$ 9,100
Contract Asset, Period Increase (Decrease)			20,700
Deferred revenues	27,575		27,575		$ 28,130
Increase (decrease) in deferred revenues			500
Deferred Revenue, Revenue Recognized	10,700		22,500
Change in Estimated Variable Consideration [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	300	2,300	1,500	4,700
Release of Allowance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 3,600	$ 2,900	$ 2,100	$ 3,400

Revenues Performance Obligations Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period		$ 5.2		$ 8.1
Revenue, Remaining Performance Obligation, Amount	$ 65.1		$ 65.1
Release of Allowance [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	3.6	2.9	2.1	3.4
Change in Estimated Variable Consideration [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Performance Obligation Satisfied in Previous Period	0.3	$ 2.3	1.5	$ 4.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 37.5		$ 37.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 months		6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 16.4		$ 16.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 11.2		$ 11.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 years		5 years

Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 10,569	$ 5,862	$ 13,919	$ 2,640
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(97)	(490)	(143)	(532)
Net income	$ 10,472	$ 5,372	$ 13,776	$ 2,108
Weighted average common shares outstanding – basic	21,997	21,709	21,933	21,651
Weighted average common stock equivalents	403	209	423	215
Weighted average common shares outstanding – diluted	22,400	21,918	22,356	21,866
Net earnings per basic share:
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.48	$ 0.27	$ 0.63	$ 0.12
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	0	(0.02)	0	(0.02)
Basic (USD per share)	0.48	0.25	0.63	0.10
Net earnings per diluted share:
Income (Loss) from Continuing Operations, Per Diluted Share	0.47	0.27	0.62	0.12
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0	(0.02)	0	(0.02)
Diluted (USD per share)	$ 0.47	$ 0.25	$ 0.62	$ 0.10

Earnings Per Share - Summary of Anti-dilutive Securities Excluded from Computation of Weighted Average Common Stock Equivalents (Detail) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities	6,258	6,358
Unvested restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities	0	63
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities	0	37
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities	3,129	3,129
Warrants related to the issuance of convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities	3,129	3,129

Earnings Per Share - Additional Information (Detail) - Share Repurchase Program [Member]	Jun. 30, 2019 USD ($)
Accelerated Share Repurchases [Line Items]
Share repurchase authorized amount	$ 125,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 35,100,000

Financing Arrangements - Summary of Carrying Amounts of Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2017
Debt Instrument [Line Items]
Net carrying amount	$ 307,624	$ 296,985
Long-term Debt, Current Maturities	(248,034)	(243,132)
Long-term debt, net of current portion	59,590	53,853
1.25% convertible senior notes due 2019
Debt Instrument [Line Items]
Net carrying amount	247,512	242,617
Senior secured credit facility
Debt Instrument [Line Items]
Net carrying amount	56,000	50,000
Promissory Note due 2024 [Member]
Debt Instrument [Line Items]
Net carrying amount	$ 4,112	$ 4,368	$ 5,100

Financing Arrangements Schedule of Maturities of Long-Term Debt (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Debt Disclosure [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 250,259
Long-term Debt, Maturities, Repayments of Principal in Year Two	529
Long-term Debt, Maturities, Repayments of Principal in Year Three	544
Long-term Debt, Maturities, Repayments of Principal in Year Four	559
Long-term Debt, Maturities, Repayments of Principal in Year Five	56,575
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 1,646

Financing Arrangements - Schedule of Convertible Notes (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2014
Convertible Senior Notes [Line Items]
Net carrying amount	$ 307,624,000	$ 296,985,000
1.25% convertible senior notes due 2019
Convertible Senior Notes [Line Items]
Proceeds	250,000,000	250,000,000	$ 250,000,000
Less: debt discount, net of amortization	(2,171,000)	(6,436,000)
Debt Issuance Costs, Net	(317,000)	(947,000)
Net carrying amount	247,512,000	242,617,000
Equity component	$ 39,287,000	$ 39,287,000

Financing Arrangements - Summary of Interest Expense Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest Expense Recognized [Line Items]
Interest Expense, Debt, Excluding Amortization	$ 781	$ 781	$ 1,563	$ 1,563
Amortization of Debt Discount (Premium)	2,145	2,047	4,265	4,068
Amortization of Debt Issuance Costs	315	310	630	619
1.25% convertible senior notes due 2019
Interest Expense Recognized [Line Items]
Interest Expense, Debt	$ 3,241	$ 3,138	$ 6,458	$ 6,250

Financing Arrangements - Additional Information (Detail) $ / shares in Units, shares in Millions					3 Months Ended	6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 22, 2017	Mar. 31, 2015 USD ($)	Sep. 30, 2014 USD ($) $ / shares shares	Mar. 31, 2015 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Payments of Debt Issuance Costs						$ 0	$ 1,385,000
Deferred tax liability						1,714,000		$ 732,000
Net carrying amount						307,624,000		296,985,000
Duration of LIBOR		1 month
Property and equipment, net						40,189,000		40,374,000
Note Hedge
Debt Instrument [Line Items]
Common stock purchased \| shares				3.1
Aggregate amount for convertible hedge				$ 42,100,000
Deferred tax asset				$ 16,500,000
Warrants related to the issuance of convertible senior notes
Debt Instrument [Line Items]
Common stock purchased \| shares				3.1
Common stock price per share \| $ / shares				$ 97.12
Aggregate proceeds from the sale of warrants				$ 23,600,000
1.25% convertible senior notes due 2019
Debt Instrument [Line Items]
Aggregate principal amount				$ 250,000,000		$ 250,000,000		250,000,000
Debt Instrument, Interest Rate, Stated Percentage				1.25%
Debt instrument maturity date				Oct. 01, 2019
Number of common shares converted upon debt conversion for each $1000 principal amount				12.5170
Principal amount of notes per conversion				$ 1,000
Optional right of debt instrument holders to convert debt instrument into cash, portion of principal amount				100.00%
Earliest conversion date				Jul. 01, 2019
Concentration risk percentage				98.00%
Effective interest rate of debt						4.751%
Debt Instrument, Convertible, Remaining Discount Amortization Period						3 months
Payments of Debt Issuance Costs				$ 7,300,000
Liability issuance costs				6,200,000
Equity issuance costs				1,100,000
Deferred tax liability				$ 15,400,000
Net carrying amount						$ 247,512,000		242,617,000
1.25% convertible senior notes due 2019 \| Minimum
Debt Instrument [Line Items]
Conversion price of convertible notes \| $ / shares				$ 79.89
Number of least trading days required within consecutive trading days				5
Number of consecutive trading days				20 days
Percentage of applicable conversion price				130.00%
Number of consecutive business days following consecutive trading days				5 days
1.25% convertible senior notes due 2019 \| Maximum
Debt Instrument [Line Items]
Conversion price of convertible notes \| $ / shares				$ 97.12
Number of least trading days required within consecutive trading days				30
Senior secured credit facility
Debt Instrument [Line Items]
Revolving Credit facility			$ 500,000,000		$ 500,000,000
Credit agreement expiration date			Mar. 23, 2023
Option to increase revolving credit facility			$ 150,000,000
Maximum principle amount			$ 650,000,000		$ 650,000,000
Convertible debt maturity term			90 days
Percentage of other equity interests in domestic subsidiaries			100.00%
Percentage of other equity interests in foreign subsidiaries			65.00%
Debt Instrument, Covenant, Consolidated Leverage Ratio, Minimum					3.50
Maximum consolidated leverage ratio					4.00
Minimum consolidated interest coverage ratio			3.50		3.50
Actual consolidated leverage ratio						2.63
Actual interest coverage ratio						13.82
Net carrying amount						$ 56,000,000		$ 50,000,000
Percentage of weighted average interest rate of borrowings						3.90%		3.70%
Outstanding letters of credit						$ 1,600,000		$ 1,600,000
Unused borrowing capacity under Credit Agreement						442,400,000
Senior secured credit facility \| Minimum \| LIBOR
Debt Instrument [Line Items]
Interest rate on borrowings			1.25%
Senior secured credit facility \| Minimum \| Base Rate [Member]
Debt Instrument [Line Items]
Interest rate on borrowings			0.25%
Senior secured credit facility \| Maximum \| LIBOR
Debt Instrument [Line Items]
Interest rate on borrowings			2.00%
Senior secured credit facility \| Maximum \| Base Rate [Member]
Debt Instrument [Line Items]
Interest rate on borrowings			1.00%
Promissory Note due 2024 [Member]
Debt Instrument [Line Items]
Interest rate on borrowings	1.97%
Net carrying amount	$ 5,100,000					4,112,000		4,368,000
Debt Instrument, Maturity Date	Mar. 01, 2024
Repayment of Principal at Maturity Date	$ 1,500,000
Duration of LIBOR	1 month
Aircraft [Domain]
Debt Instrument [Line Items]
Property and equipment, net						$ 5,400,000		$ 5,800,000

Restructuring Charges - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Restructuring Charges [Abstract]
Restructuring charges	$ 754		$ 1,984		$ 2,029	$ 2,696
Operating Lease, Impairment Loss		$ 700			805	$ 0
Restructuring and Related Cost, Accelerated Depreciation		200
Restructuring reserve	1,093				1,093		$ 1,792	$ 2,911
Employee Severance [Member]
Restructuring Charges [Abstract]
Restructuring charges	200		1,000
Restructuring reserve	83				83		443	443
Office Space Reductions [Member]
Restructuring Charges [Abstract]
Restructuring reserve	1,010				1,010		$ 1,349	$ 2,468
Corporate, Non-Segment [Member] \| Employee Severance [Member]
Restructuring Charges [Abstract]
Restructuring charges		$ 200
Business Advisory \| Other Restructuring [Member]
Restructuring Charges [Abstract]
Restructuring charges			300
Huron Legal [Member] \| Discontinued Operations [Member]
Restructuring Charges [Abstract]
Restructuring charges					$ 200
Middleton, Wisconsin [Member] \| Office Space Reductions [Member]
Restructuring Charges [Abstract]
Restructuring charges	400		$ 700
Houston, Texas [Member] \| Office Space Reductions [Member]
Restructuring Charges [Abstract]
Restructuring charges	$ 100
San Francisco, CA [Member] \| Office Space Reductions [Member]
Restructuring Charges [Abstract]
Restructuring charges				$ 600

Restructuring Charges Restructuring Liability Rollforward (Details) - USD ($) $ in Thousands		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1,792	$ 1,093	$ 2,911
Restructuring and Related Cost, Incurred Cost		494
Payments for Restructuring		(1,226)
Restructuring Reserve, Accrual Adjustment		33
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	443	83	443
Restructuring and Related Cost, Incurred Cost		429
Payments for Restructuring		(784)
Restructuring Reserve, Accrual Adjustment		(5)
Office Space Reductions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	1,349	1,010	$ 2,468
Restructuring and Related Cost, Incurred Cost		65
Payments for Restructuring		(442)
Restructuring Reserve, Accrual Adjustment		$ 38
Accounting Standards Update 2016-02 [Member]
Restructuring Cost and Reserve [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(1,119)
Accounting Standards Update 2016-02 [Member] \| Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0
Accounting Standards Update 2016-02 [Member] \| Office Space Reductions [Member]
Restructuring Cost and Reserve [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (1,119)

Derivative Instruments and Hedging Activity - Additional Information (Detail) - USD ($)		6 Months Ended
	Jun. 22, 2017	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest rate swap agreement, effective date	Aug. 31, 2017
Interest rate swap agreement, end date	Aug. 31, 2022
Interest rate swap agreement for a notional amount	$ 50,000,000.0
Duration of LIBOR	1 month
Percentage of fixed rate	1.90%
Gain (loss) reclassification from accumulated OCI to income, estimate of time to transfer		12 months

Derivative Instruments and Hedging Activity - Fair Value Interest Rate Swaps Designated as Cash Flow Hedging Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Prepaid Expenses and Other Current Assets [Member]
Fair Value interest rate swaps designated as cash flow hedging instruments
Fair Value (Derivative Asset and Liability)	$ 0	$ 302
Other Noncurrent Assets [Member]
Fair Value interest rate swaps designated as cash flow hedging instruments
Fair Value (Derivative Asset and Liability)	0	451
Accrued Liabilities [Member]
Fair Value interest rate swaps designated as cash flow hedging instruments
Fair Value (Derivative Asset and Liability)	16	0
Other Noncurrent Liabilities [Member]
Fair Value interest rate swaps designated as cash flow hedging instruments
Fair Value (Derivative Asset and Liability)	$ 383	$ 0

Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Asset/Liability
Assets, fair value	$ 84,423	$ 69,387
Financial and Nonfinancial Liabilities, Fair Value Disclosure	1,029	11,441
Contingent consideration for business acquisitions
Fair Value, Asset/Liability
Financial and Nonfinancial Liabilities, Fair Value Disclosure	630	11,441
Interest Rate Swap [Member]
Fair Value, Asset/Liability
Assets, fair value		753
Financial and Nonfinancial Liabilities, Fair Value Disclosure	399
Convertible debt investment
Fair Value, Asset/Liability
Assets, fair value	59,357	50,429
Level 2
Fair Value, Asset/Liability
Assets, fair value	25,066	18,958
Financial and Nonfinancial Liabilities, Fair Value Disclosure	399	0
Level 2 \| Interest Rate Swap [Member]
Fair Value, Asset/Liability
Assets, fair value		753
Financial and Nonfinancial Liabilities, Fair Value Disclosure	399
Level 3
Fair Value, Asset/Liability
Assets, fair value	59,357	50,429
Financial and Nonfinancial Liabilities, Fair Value Disclosure	630	11,441
Level 3 \| Contingent consideration for business acquisitions
Fair Value, Asset/Liability
Financial and Nonfinancial Liabilities, Fair Value Disclosure	630	11,441
Level 3 \| Convertible debt investment
Fair Value, Asset/Liability
Assets, fair value	59,357	50,429
Deferred Compensation Plan Assets [Member]
Fair Value, Asset/Liability
Assets, fair value	25,066	18,205
Deferred Compensation Plan Assets [Member] \| Level 2
Fair Value, Asset/Liability
Assets, fair value	$ 25,066	$ 18,205

Fair Value of Financial Instruments - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2014
Fair Value of Financial Instruments [Abstract]
Investments in notes	$ 59,357,000	$ 50,429,000
Closing price of common stock	$ 50.38
1.25% convertible senior notes due 2019
Fair Value of Financial Instruments [Abstract]
Aggregate principal amount	$ 250,000,000	$ 250,000,000	$ 250,000,000
Convertible debt investment \| Shorelight Holdings LLC
Fair Value of Financial Instruments [Abstract]
Investments in notes	$ 27,900,000
Debt Instrument, Maturity Date	Jul. 01, 2021

Fair Value of Financial Instruments - Summary of Carrying Amount and Estimated Fair Value of Convertible Notes (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Carrying Amounts And Estimated Fair Values Of Financial Instruments [Line Items]
Net carrying amount	$ 307,624	$ 296,985
1.25% convertible senior notes due 2019
Carrying Amounts And Estimated Fair Values Of Financial Instruments [Line Items]
Net carrying amount	247,512	242,617
Estimated Fair Value	$ 247,683	$ 242,940

Fair Value of Financial Instruments Fair Value of Financial Instruments - Contingent Consideration Reconciliation (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 1,029	$ 11,441
Contingent consideration for business acquisitions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(10,041)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	(876)
Contingent consideration for business acquisitions \| Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	630	$ 11,441
Foreign Currency Gain (Loss) [Member] \| Contingent consideration for business acquisitions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	$ 106

Fair Value of Financial Instruments Fair Value of Financial Instruments - Convertible Debt Investment Reconciliation (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 84,423	$ 69,387
Convertible senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	8,928
Convertible senior notes \| Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 59,357	$ 50,429

Other Comprehensive Income (Loss )- Components of Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Foreign currency translation adjustment, before taxes	$ (359)	$ (954)	$ (43)	$ (920)
Foreign currency translation adjustment, taxes	0	0	0	0
Foreign currency translation adjustment, net of taxes	(359)	(954)	(43)	(920)
Unrealized gain on investment, before taxes	5,319	4,268	8,928	7,195
Unrealized gain on investment, tax (expense) benefit	(1,404)	(1,109)	(2,356)	(1,870)
Unrealized gain on investment, net of taxes	3,915	3,159	6,572	5,325
Change in fair value, before taxes	(759)	250	(1,006)	795
Change in fair value, tax (expense) benefit	201	(66)	266	(207)
Change in fair value, net of taxes	(558)	184	(740)	588
Reclassification adjustments into earnings, before taxes	(72)	(2)	(146)	36
Reclassification adjustments into earnings, tax (expense) benefit	18	1	37	(9)
Reclassification adjustments into earnings, net of taxes	(54)	(1)	(109)	27
Net unrealized gain (loss), before taxes	(831)	248	(1,152)	831
Net unrealized gain (loss), tax (expense) benefit	219	(65)	303	(216)
Net unrealized gain (loss), net of taxes	(612)	183	(849)	615
Other comprehensive income (loss), before taxes	4,129	3,562	7,733	7,106
Other comprehensive income (loss), tax (expense) benefit	(1,185)	(1,174)	(2,053)	(2,086)
Accumulated Other Comprehensive (Income) Loss, Current period change	$ 2,944	$ 2,388	$ 5,680	$ 5,020

Other Comprehensive Income (Loss )- Components of Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Foreign Currency Translation Adjustments, Beginning balance			$ (665)
Foreign currency translation adjustments, net of tax	$ (359)	$ (954)	(43)	$ (920)
Foreign Currency Translation Adjustments, Ending balance	(708)		(708)
Net Unrealized Gain (Loss) on Investment, Beginning balance			16,584
Unrealized gain on investment, net of tax	3,915	3,159	6,572	5,325
Net Unrealized Gain (Loss) on Investment, Ending balance	23,156		23,156
Net Unrealized Losses on Derivatives, Beginning balance			576
Unrealized gain (loss) on cash flow hedging instruments, net of tax	(612)	183	(849)	615
Net Unrealized Losses on Derivatives, Ending balance	(273)		(273)
Accumulated Other Comprehensive Income (Loss), Beginning balance			16,495
Accumulated Other Comprehensive (Income) Loss, Current period change	2,944	$ 2,388	5,680	$ 5,020
Accumulated Other Comprehensive Income (Loss), Ending balance	$ 22,175		$ 22,175

- Definition

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

+ References + Details

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Line Items]
Effective Income Tax Rate Reconciliation, Percent	24.80%	30.40%	25.80%	53.00%
Income tax expense	$ 3,477	$ 2,561	$ 4,842	$ 2,974
Income from continuing operations before taxes	$ 14,046	$ 8,423	$ 18,761	$ 5,614
Effective Income Tax Rate Reconciliation, at Statutory Rate, Inclusive of State Income Tax, Percent	26.40%	26.00%	26.40%	26.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Percent				22.50%
Unrecognized Tax Benefits	$ 800		$ 800

Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Commitments And Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement	$ 2.5
Senior secured credit facility
Commitments And Contingencies [Line Items]
Guarantees in the form of letters of credit		$ 1.6	$ 1.6

Segment Information - Additional Information (Detail)	6 Months Ended
Segment Information - Additional Information (Detail)	Jun. 30, 2019 Segment
Segment Reporting [Abstract]
Receivables from Major Customer Percentage	11.10%
Number of Operating Segments	3

Segment Information - Components of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Components of Segment Information
Operating income (loss)	$ 17,875	$ 19,138	$ 24,631	$ 21,460
Revenue from Contract with Customer, Including Assessed Tax	220,754	197,544	425,199	391,223
Reimbursable Revenues	23,534	20,733	42,151	38,352
Total revenues and reimbursable expenses	244,288	218,277	467,350	429,575
Gain (Loss) Related To Litigation Settlement And Other Operating Gains	485	6,707	941	5,877
Depreciation and amortization	7,151	8,917	14,323	17,720
Other expense, net	(3,829)	(10,715)	(5,870)	(15,846)
Income from continuing operations before income tax expense	14,046	8,423	18,761	5,614
Healthcare
Components of Segment Information
Revenue from Contract with Customer, Including Assessed Tax	101,939	91,500	195,621	181,395
Business Advisory
Components of Segment Information
Revenue from Contract with Customer, Including Assessed Tax	62,277	57,720	121,083	113,615
Education [Member]
Components of Segment Information
Revenue from Contract with Customer, Including Assessed Tax	56,538	48,324	108,495	96,213
Operating Segments
Components of Segment Information
Operating income (loss)	61,022	52,545	111,072	97,428
Revenue from Contract with Customer, Including Assessed Tax	220,754	197,544	425,199	391,223
Reimbursable Revenues	23,534	20,733		38,352
Total revenues and reimbursable expenses	244,288	218,277	467,350	429,575
Operating Segments \| Healthcare
Components of Segment Information
Operating income (loss)	$ 33,344	$ 27,072	$ 61,195	$ 51,532
Segment operating income as a percentage of segment revenues	32.70%	29.60%	31.30%	28.40%
Revenue from Contract with Customer, Including Assessed Tax	$ 101,939	$ 91,500	$ 195,621	$ 181,395
Operating Segments \| Business Advisory
Components of Segment Information
Operating income (loss)	$ 11,474	$ 14,218	$ 21,055	$ 23,216
Segment operating income as a percentage of segment revenues	18.40%	24.60%	17.40%	20.40%
Revenue from Contract with Customer, Including Assessed Tax	$ 62,277	$ 57,720	$ 121,083	$ 113,615
Operating Segments \| Education [Member]
Components of Segment Information
Operating income (loss)	$ 16,204	$ 11,255	$ 28,822	$ 22,680
Segment operating income as a percentage of segment revenues	28.70%	23.30%	26.60%	23.60%
Revenue from Contract with Customer, Including Assessed Tax	$ 56,538	$ 48,324	$ 108,495	$ 96,213
Segment Reconciling Items
Components of Segment Information
Other operating expenses	36,481	31,197	73,059	64,125
Gain (Loss) Related To Litigation Settlement And Other Operating Gains	(485)	(6,707)	(941)	(5,877)
Depreciation and amortization	7,151	8,917	14,323	17,720
Other expense, net	$ 3,829	$ 10,715	$ 5,870	$ 15,846