Accelerated Share Repurchases [Line Items] Accelerated Share Repurchases [Line Items] Accelerated Share Repurchases [Table] Accelerated Share Repurchases [Table] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable, Current Accounts payable Accounts Receivable, Net, Current Receivables from clients, net The accrual for payments to acquire businesses including earn-out payments, which represents additional purchase price earned by selling shareholders subsequent to the business combination as certain financial performance targets and conditions are met, and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date. Accrued Consideration For Business Acquisitions Current Accrued consideration for business acquisitions Accrued Income Taxes, Current Income tax payable Accrued Liabilities, Current Accrued expenses Accrued Liabilities [Member] Accrued expenses [Member] Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Net Unrealized Gain on Investment, Ending balance Net Unrealized Gain on Investment, Beginning balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Net Unrealized Losses on Derivatives, Ending balance Net Unrealized Losses on Derivatives, Beginning balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Foreign Currency Translation Adjustments, Ending balance Foreign Currency Translation Adjustments, Beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Loss, Ending balance Accumulated Other Comprehensive Loss, Beginning balance Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Components of accumulated other comprehensive loss, net of tax Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Loss [Member] Principal amount of additional convertible debt instrument. Additional Long Term Investments Purchase of additional convertible notes Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Adjustments Related to Tax Withholding for Share-based Compensation Shares redeemed for employee tax withholdings Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Equity component of convertible senior notes, net of tax and issuance costs The amount of decrease in additional paid in capital (APIC) resulting from the purchase of convertible senior note hedges. Adjustments To Additional Paid In Capital Note Hedge Purchase of convertible senior note hedges, net of tax Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Income tax benefit on share-based compensation Adjustments to Additional Paid in Capital, Warrant Issued Issuance of warrants Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Other Segments [Member] All Other [Member] Amount of the current period expense and reduction of revenue charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables and unbilled services, to an amount that approximates their net realizable value (the amount expected to be collected). Allowances For Doubtful Accounts And Unbilled Services Allowances for doubtful accounts and unbilled services Amendment Flag Amendment Flag Amortization of Debt Discount (Premium) Amortization of debt discount Amortization of Financing Costs Amortization of debt issuance costs Amortization of Financing Costs and Discounts Amortization of debt discount and issuance costs Amortization of Intangible Assets Intangible assets amortization expense Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Total anti-dilutive securities Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Assets Total assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets, Fair Value Disclosure Assets, fair value Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Basis of Accounting [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Combination, Contingent Consideration, Liability Contingent consideration related to business acquisitions Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Intangible assets related to acquisition Capital Expenditures Incurred but Not yet Paid Property and equipment expenditures included in accounts payable and accrued expenses Carrying Amounts And Estimated Fair Values Of Financial Instruments [Line Items] Carrying Amounts And Estimated Fair Values Of Financial Instruments [Line Items] Carrying Amounts And Estimated Fair Values Of Financial Instruments [Line Items] Carrying Amounts And Estimated Fair Values Of Financial Instruments [Table] Carrying Amounts And Estimated Fair Values Of Financial Instruments [Table] Carrying Amounts And Estimated Fair Values Of Financial Instruments [Table] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of the period Cash and cash equivalents at beginning of the period Cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Chicago London New York And Washington Dc [Member]. Chicago London New York And Washington Dc [Member] Chicago London New York and Washington Dc [Member] Chicago New York And London Offices. Chicago New York And London Offices [Member] Chicago New York and London Offices [Member] Maximum amount of civil penalties per violation under the federal false claims act. Civil Penalties As Per Violation Under Party One Maximum amount of civil penalties per violation under the Federal False Claims Act Maximum amount of civil penalties per violation under the state false claims act. Civil Penalties As Per Violation Under Party Two Maximum amount of civil penalties per violation under the State False Claims Act Claim Against Breach Of Contract [Member] Claim Against Breach Of Contract [Member] Claim against breach of contract [Member] Claim Against Damage On Reputation [Member] Claim Against Damage On Reputation [Member] Claim against damage on reputation and defamation [Member] Class of Warrant or Right, Exercise Price of Warrants or Rights Common stock price per share Combined Receivables And Unbilled Service Balances [Member] Combined Receivables And Unbilled Service Balances [Member] Combined Receivables and Unbilled Services Balances [Member] Commitments and Contingencies Commitments and Contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and Contingencies, Policy [Policy Text Block] Contingencies Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments Contingencies and Guarantees [Text Block] Commitments, Contingencies and Guarantees Common Stock [Member] Common Stock [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued The number of shares of common stock underlying the convertible senior notes as well as the warrants and convertible note hedge transactions purchased concurrently with the issuance of the convertible senior notes. Common Stock Underlying Convertible Senior Note And Related Transactions Common stock purchased Common Stock, Value, Issued Common stock; $0.01 par value; 500,000,000 shares authorized; 25,033,760 and 25,246,565 shares issued at September 30, 2014 and December 31, 2013, respectively Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income: Comprehensive Income (Loss) Note [Text Block] Other Comprehensive Income (Loss) Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Percentage Customer percentage of consolidated receivables and unbilled services or consolidated net sales revenue Concentration Risk Type [Domain] Concentration Risk Type [Domain] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Contingent Acquisition Liability [Member] Contingent Acquisition Liability [Member] Contingent acquisition liability [Member] Convertible Debt Securities [Member] Convertible Debt Investment [Member] Convertible Debt [Table Text Block] Schedule of Notes Convertible Senior Notes [Line Items] Convertible Senior Notes [Line Items] Convertible Senior Notes [Line Items] Cost of Reimbursable Expense Reimbursable expenses Cost of Revenue Total direct costs and reimbursable expenses Cost of Services Direct costs Cost of Services, Depreciation and Amortization Amortization of intangible assets and software development costs The base amount of dividends which may be declared by the entity without restriction under the loan agreement. The total dividend restriction amount is equal to the base amount plus a percentage of cumulative consolidated net income and a percentage of the net cash proceeds from equity issuances. Credit Agreement Dividends Restriction Amount Credit Agreement, dividends restriction amount Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Customer Concentration Risk [Member] Customer Concentration Risk [Member] Customer Contracts [Member] Customer contracts [Member] Customer Relationships [Member] Customer relationships [Member] Debt Conversion, Original Debt, Due Date of Debt Debt instrument maturity date Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Financing Arrangements Debt Instrument, Convertible, Carrying Amount of Equity Component Carrying value of equity component Equity component Debt Instrument, Convertible, Conversion Price Conversion price of convertible notes Debt Instrument, Convertible, Conversion Ratio Number of common shares converted upon debt conversion for each $1000 principal amount The earliest date on which the debt instrument can be converted into equity if none of the other conversion conditions have been met. Debt Instrument Convertible Date Earliest conversion date Debt Instrument, Convertible, Remaining Discount Amortization Period Remaining life of notes Debt Instrument, Convertible, Threshold Consecutive Trading Days Number of least trading days required within 30 consecutive trading days Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Percentage of applicable conversion price Debt Instrument, Face Amount Aggregate principal amount Proceeds Debt Instrument, Interest Rate, Effective Percentage Effective interest rate of debt Debt Instrument, Interest Rate, Stated Percentage Debt instrument interest rate Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Maturity Date Debt instrument maturity date Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Unamortized Discount Less: debt discount, net of amortization Debt Issuance Cost Debt issuance costs Total debt issuance costs assigned to the liability component of the convertible senior notes based on the relative fair value of the liability component to the total value of the notes issued. Debt Issuance Costs Assigned To Liability Liability Issuance costs Debt, Policy [Policy Text Block] Debt Debt, Weighted Average Interest Rate Percentage of weighted average interest rate of borrowings The payment of deferred acquisition amounts, which represents additional purchase price earned by selling shareholders subsequent to the business combination as certain financial performance targets and conditions are met. Deferred Acquisition Payments Deferred acquisition payments Deferred Acquisition Payments [Member] Deferred Acquisition Payments [Member] Deferred acquisition payment [Member] Aggregate carrying value, as of the balance sheet date, of the liabilities for all deferred compensation arrangements and all other non current obligations not separately disclosed in the balance sheet payable beyond one year (or the operating cycle, if longer). Deferred Compensation And Other Liabilities Deferred compensation and other liabilities Deferred Compensation And Other Liabilities [Member] Deferred Compensation And Other Liabilities [Member] Deferred compensation and other liabilities [Member] Deferred Income Taxes and Tax Credits Deferred income taxes Cash outflows to vendors under deferred payment arrangements that arose from purchases of property, plant and equipment or other productive assets. Deferred Payments to Acquire Property, Plant, and Equipment Deferred payments for purchase of property and equipment Deferred Rent Credit, Noncurrent Deferred lease incentives Deferred Revenue, Current Deferred revenues Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes, net Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred tax asset Deferred Tax Liabilities, Net, Noncurrent Deferred income taxes, net Deferred tax liability Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Depreciation and amortization expense Depreciation, Depletion and Amortization Depreciation and amortization Derivative Contract [Domain] Derivative Contract [Domain] Derivative, Inception Date Interest rate swap agreement, effective date Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments and Hedging Activity Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred Anticipated net losses, net of tax, currently recorded in accumulated other comprehensive loss reclassified into earnings Derivative [Line Items] Derivative [Line Items] Derivative, Maturity Date Interest rate swap agreement, end date Derivative, Notional Amount Interest rate swap agreement for a notional amount Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivatives, Policy [Policy Text Block] Derivatives and Hedging Derivative [Table] Derivative [Table] Direct Costs And Reimbursable Expenses Exclusive Of Depreciation And Amortization Shown In Operating Expenses [Abstract] Direct Costs And Reimbursable Expenses Exclusive Of Depreciation And Amortization Shown In Operating Expenses [Abstract] Direct costs and reimbursable expenses (exclusive of depreciation and amortization shown in operating expenses): Discontinued Operations, Policy [Policy Text Block] Discontinued Operations and Disclosures of Disposals of Components Document and entity information. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Reviewer Database [Member] Document Reviewer Database [Member] Document reviewer database [Member] Document Type Document Type The duration of LIBOR which is used to calculate the interest received from the counterparty. Duration Of Libor Duration of LIBOR Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic Net income Net income Earnings Per Share, Basic [Abstract] Net earnings per basic share: Earnings Per Share, Diluted Net income Net income Earnings Per Share, Diluted [Abstract] Net earnings per diluted share: Earnings Per Share Reconciliation [Abstract] Reconciliation of basic and diluted earnings per share Earnings Per Share [Text Block] Earnings Per Share Effective Income Tax Rate Reconciliation, Percent Effective tax rates Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash Eligible Item or Group for Fair Value Option [Axis] Eligible Item or Group for Fair Value Option [Axis] Employee-related Liabilities, Current Accrued payroll and related benefits Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Equity Method Investments And Cost Method Investments [Abstract] Equity Method Investments And Cost Method Investments [Abstract] Equity Method Investments And Cost Method Investments [Abstract] Expense related to the establishment of a valuation allowance and increased deferred tax liabilities as a result of the check-the-box election. Establishment Of Valuation Allowance And Increased Deferred Tax Liability Expense related to valuation allowance and deferred tax liability Excess Tax Benefit from Share-based Compensation, Financing Activities Tax benefit from share-based compensation Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Liability Class [Axis] Liability Class [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value of Financial Instruments Fair Value Inputs, Discount Rate Discount rate used to measure fair value Fair Value, Inputs, Level 1 [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 2 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements and Disclosures Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Net Asset (Liability) [Abstract] Fair Value, Asset/Liability Fair Value, Option, Eligible Item or Group [Domain] Fair Value, Option, Eligible Item or Group [Domain] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Financial Instruments, Owned, at Fair Value [Abstract] Fair Value of Financial Instruments [Abstract] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Finite-Lived Intangible Assets, Amortization Expense, after Year Five Estimated annual intangible assets amortization expense 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Estimated annual intangible assets amortization expense 2014 Finite-Lived Intangible Assets, Amortization Expense, Year Five Estimated annual intangible assets amortization expense 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Four Estimated annual intangible assets amortization expense 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Three Estimated annual intangible assets amortization expense 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Two Estimated annual intangible assets amortization expense 2015 Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Gross Gross Carrying Amount Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Net [Abstract] Intangible assets Finite-Lived Intangible Asset, Useful Life Useful Life in Years The actual fixed charge coverage ratio achieved by the entity for the period presented. Fixed Charge Coverage Ratio Actual fixed charge coverage ratio Foreign Currency Transactions and Translations Policy [Policy Text Block] Cumulative Translation Adjustment Frankel Group Associates Llc [Member] Frankel Group Associates Llc [Member] Frankel Group Associates LLC [Member] Gain (Loss) Related to Litigation Settlement Litigation settlement gain (loss) Amount of gain (loss) recognized in settlement of litigation and insurance claims and other operating activities. Excludes claims within an insurance entity's normal claims settlement process. Gain Loss Related To Litigation Settlement And Other Operating Gains Litigation and other gains Disclosure of accounting policy for consideration of the company's ability to continue as a going concern. Going Concern [Policy Text Block] Going Concern Goodwill Goodwill, net ending balance Goodwill, net beginning balance Goodwill Goodwill, Acquired During Period Goodwill recorded in connection with business combinations Goodwill related to acquisition Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Goodwill, Gross Goodwill Goodwill, Impaired, Accumulated Impairment Loss Accumulated impairment Goodwill [Line Items] Goodwill [Line Items] Goodwill, Transfers Goodwill reallocation Reassigned goodwill Goodwill, Translation Adjustments Foreign currency translation Huron Business Advisory [Member] Huron Business Advisory [Member] Huron Business Advisory [Member] Huron Education And Life Sciences [Member] Huron Education And Life Sciences [Member] Huron Education and Life Sciences [Member] Huron Healthcare [Member] Huron Healthcare [Member] Huron Healthcare [Member] Huron Legal [Member] Huron Legal [Member] Huron Legal [Member] Impact of Cash Flow Classification Error [Abstract] Impact of Cash Flow Classification Error [Abstract] Impact of Cash Flow Classification Error [Abstract] Impact of prior period cash flow error on cash flows from financing activities resulting from the inclusion of property and equipment purchased on account in investing activities. Impact Of Cash Flow Error On Financing Activities Impact of cash flow classification error on financing activities Impact of prior period cash flow error on cash flows from investing activities resulting from the inclusion of property and equipment purchased on account in investing activities. Impact Of Cash Flow Error On Investing Activities Impact of cash flow classification error on investing activities Impact of prior period cash flow error on cash flows from operating activities resulting from the inclusion of property and equipment purchased on account in investing activities. Impact Of Cash Flow Error On Operating Activities Impact of cash flow classification error on operating activities Income (Loss) from Continuing Operations Attributable to Parent Net income from continuing operations Net income from continuing operations Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income from continuing operations before income tax expense Income (Loss) from Continuing Operations, Per Basic Share Income from continuing operations Net income from continuing operations Income (Loss) from Continuing Operations, Per Diluted Share Income from continuing operations Net income from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Income (loss) from discontinued operations, net of tax Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income Taxes Receivable, Current Income tax receivable Income Tax Expense (Benefit) Income tax expense Income Tax, Policy [Policy Text Block] Income Taxes Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (decrease) in accounts payable and accrued liabilities Increase (Decrease) in Accounts Receivable (Increase) decrease in receivables from clients Increase (Decrease) in Deferred Revenue Increase (decrease) in deferred revenues Increase (Decrease) in Employee Related Liabilities Increase (decrease) in accrued payroll and related benefits Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable (Increase) decrease in current income tax receivable / payable, net Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Other Operating Assets (Increase) decrease in other assets Increase (Decrease) in Unbilled Receivables (Increase) decrease in unbilled services Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Interest Expense, Debt Total interest expense recognized Interest Expense, Debt, Excluding Amortization Contractual interest coupon Tabular disclosure of components of interest expense recognized during the period related to the convertible senior notes. Components of interest expense include the contractual interest coupon, the amortization of debt issuance costs, and the amortization of the debt discount. Interest Expense Disclosure [Table Text Block] Summary of Interest Expense Recognized The cost of borrowed funds accounted for as interest that was charged against earnings during the period, net of immaterial amounts of interest income recognized during the period associated with banking, investing or other activities. Interest Expense Net Of Interest Income Interest expense, net of interest income Interest Rate Cash Flow Hedge Derivative at Fair Value, Net Fair Value (Derivative Asset and Liability) Interest Rate Cash Flow Hedge Derivative at Fair Value, Net [Abstract] Fair Value interest rate swaps designated as cash flow hedging instruments The fixed interest rate we pay to the counterparty of the interest rate swap. Interest Rate Swap Fixed Interest Rate Percentage of fixed rate Interest Rate Swap [Member] Interest rate swap [Member] Investment, Policy [Policy Text Block] Debt and Equity Securities Total issuance costs assigned to the equity component of the convertible senior notes based on the relative fair value of the equity component to the total value of the notes issued. Issuance Costs Assigned To Equity Equity Issuance costs Issuance Of Common Stock In Connection With [Abstract] Issuance Of Common Stock In Connection With [Abstract] Issuance of common stock in connection with: Letters of Credit Outstanding, Amount Guarantees in the form of letters of credit Outstanding letters of credit The actual leverage ratio achieved by the entity for the period presented. Leverage Ratio Actual leverage ratio Liabilities and Equity Total liabilities and stockholders' equity Liabilities and Equity [Abstract] Liabilities and stockholders' equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Financial and Nonfinancial Liabilities, Fair Value Disclosure Liabilities, fair value Liabilities, Fair Value Disclosure [Abstract] Liabilities: Liabilities, Noncurrent Total non-current liabilities Liabilities, Noncurrent [Abstract] Non-current liabilities: License [Member] License [Member] License [Member] Long-term Line of Credit Borrowings outstanding under credit facility The spread over the Eurodollar rate in order to calculate the base rate. Line Of Credit Basis Of Spread On Eurodollar Rate Percentage of Eurodollar Rate The spread over the federal funds rate in order to calculate the base rate. Line Of Credit Basis Of Spread On Federal Fund Rate Percentage of Federal Funds Rate Line of Credit Facility, Expiration Date Maturity date Line Of Credit Facility Final Payment Line Of Credit Facility Final Payment Final payment Amount of the required periodic payments of principal to begin June 2015. Line Of Credit Facility Future Periodic Payment Principal Increase quarterly principal payment Line of Credit Facility, Maximum Borrowing Capacity Aggregate principal amount Aggregate amount of the option available to increase the revolving credit facility, subject to certain requirements. Line Of Credit Facility Maximum Borrowing Capacity Increase Available Aggregate amount of option available to increase the revolving credit facility Line of Credit Facility, Periodic Payment, Principal Quarterly principal payment Line of Credit Facility, Remaining Borrowing Capacity Unused borrowing capacity under Credit Agreement Line of Credit Facility [Table] Line of Credit Facility [Table] London Office [Member] London Office [Member] London Office [Member] Long-term Debt Carrying amount Net carrying amount Long-term Debt, Current Maturities Current maturities of long term debt Current maturities of debt Long-term Debt, Fair Value Estimated Fair Value Long-term Debt, Excluding Current Maturities Long term debt, net of current portion Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Long-term Investments Investments in notes Long term investment Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Damages Sought, Value Loss contingency damages sought value Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Segment Reconciling Items [Member] Segment Reconciling Items [Member] The maximum leverage ratio required under the terms of the loan agreement. Maximum Leverage Ratio Maximum leverage ratio Maximum [Member] Maximum [Member] The minimum fixed charge coverage ratio required under the terms of the loan agreement. Minimum Fixed Charge Coverage Ratio Minimum fixed charge coverage ratio Minimum [Member] Minimum [Member] The minimum net worth amount required under the terms of the loan agreement. Minimum Net Worth Amount Minimum net worth amount The minimum trading price as a percentage of the product of the last reported share price and the conversion rate of the notes. Minimum Trading Price Percentage Concentration risk percentage Nature of Operations [Text Block] Description of Business Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Income (Loss) Attributable to Parent Net income Net income The recognized net tax benefit from the one-time "check-the-box" election to treat a wholly owned foreign subsidiary as a disregarded entity. Net Income Tax Benefit Recognized from Intercompany Receivable Write Off Net tax benefit recognized from check-the-box election New Accounting Pronouncements and Changes in Accounting Principles [Text Block] New Accounting Pronouncements The face value of the promissory note received for the sale of discontinued operations. Non Cash Consideration For Sale Of Discontinued Operation Promissory note received for sale of Accounting Advisory Non Cash Financing Activities [Abstract] Non Cash Financing Activities [Abstract] Non-cash investing and financing activities: Noncompete Agreements [Member] Non-competition agreements [Member] Nonoperating Income (Expense) Total other expense, net Other expense, net Nonoperating Income (Expense) [Abstract] Other income (expense), net: Note Hedge [Member] Note Hedge [Member] Note Hedge [Member] Number of consecutive trading days during the last month of the preceding quarter in which the closing price on 20 such days must meet the stock price threshold defined in the indenture. Number Of Consecutive Period Of Trading Number of consecutive trading days Number Of Customers Number Of Customers Number of clients with a balance greater than 10% of consolidated receivables and unbilled services Number of Operating Segments Number of operating segments One Point Two Five Percent Convertible Senior Notes Due Two Thousand And Nineteen [Member] One Point Two Five Percent Convertible Senior Notes Due Two Thousand And Nineteen [Member] 1.25% Convertible Senior Notes Due 2019 [Member] Operating Expenses [Abstract] Operating expenses and other operating gains: The aggregate costs generally recurring and associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services, net of any operating gains recognized in the period. Operating Expenses Net of Gains Total operating expenses and other operating gains Operating Income (Loss) Operating income (loss) Operating income Segment operating income (loss) as percent of segment revenues. Operating Income Loss As Percent Of Revenues Segment operating income as a percentage of segment revenues Operating Segments [Member] Operating Segments [Member] Other Assets, Noncurrent Other non-current assets Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent Net unrealized gain (loss), before taxes Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Portion Attributable to Parent Net unrealized gain (loss), tax (expense) benefit Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Unrealized gain on investment, before taxes Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized gain on investment, net of taxes Net Unrealized Gain on Investment, Current period change Unrealized gain on investment, net of tax Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Unrealized gain on investment, tax (expense) benefit Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Other comprehensive income (loss), before taxes Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Net Unrealized Losses on Derivatives, Current period change Net unrealized gain (loss), net of taxes Unrealized gain (loss) on cash flow hedging instruments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Foreign currency translation adjustment, before taxes Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation gain (loss), net of tax Foreign currency translation adjustment, net of taxes Foreign Currency Translation Adjustments, Current period change Amount of tax expense (benefit) related to, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Tax Foreign currency translation adjustment, tax (expense) benefit Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Accumulated Other Comprehensive Loss, Current period change Other comprehensive income (loss) Other comprehensive income (loss), net of taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Reclassification adjustments into earnings, before taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Reclassification adjustments into earnings, net of taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Reclassification adjustments into earnings, tax (expense) benefit Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Other comprehensive income (loss), tax (expense) benefit Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Change in fair value, before taxes Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Change in fair value, net of taxes Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Change in fair value, tax (expense) benefit Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on investments - debt and equity securities Other Noncurrent Assets [Member] Other non-current assets [Member] Other Nonoperating Income (Expense) Other income (expense), net Other Restructuring Costs Lease payments, net of estimated sublease income charges Other Selling, General and Administrative Expense Other operating expenses and gains Other Significant Noncash Transaction, Value of Consideration Given Contingent consideration related to business acquisitions The cash outflow associated with the amount paid for convertible senior note hedges. Payments For Note Hedges Aggregate amount for convertible hedge Payments for convertible senior note hedges Payments for (Proceeds from) Life Insurance Policies Net investment in life insurance policies Payments of Debt Issuance Costs Payments for debt issuance costs Payments Related to Tax Withholding for Share-based Compensation Shares redeemed for employee tax withholdings Payments to Acquire Available-for-sale Securities, Debt Purchase of convertible debt investment Payments to Acquire Businesses, Gross Fair value of purchase consideration Payments to Acquire Businesses, Net of Cash Acquired Purchases of businesses Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment, net Payments to Develop Software Capitalization of internally developed software Alleged amount of outlier payments received. Payments Under Medicare And Medicaid Programs In Violation Alleged amount of outlier payments received Percentage of cumulative consolidated net income added to the base amount for the calculation of the total restriction on dividends under the loan agreement. Percentage Of Cumulative Consolidated Net Income For Calculation Of Restriction On Dividends Percentage of cumulative consolidated net income Percentage of net cash proceeds from equity issuances added to the base amount for the calculation of the total restriction on dividends under the loan agreement. Percentage Of Net Cash Proceeds From Equity Issuances For Calculation Of Restriction On Dividends Percentage of net cash proceeds from equity issuances The percentage of pledged voting stock or other equity instruments in the domestic subsidiaries to secure the revolver and term loan. Percentage Of Pledged Voting Stock In Domestic Subsidiaries Percentage of other equity interests in domestic subsidiaries The percentage of pledged voting stock or other equity instruments in the foreign subsidiaries to secure the revolver and term loan. Percentage Of Pledged Voting Stock In Foreign Subsidiaries Percentage of other equity interests in foreign subsidiaries Percentage of principal amount required to be paid upon a debt holder's exercise of the put option following a fundamental change as defined in the indenture. Percentage Of Principal Paid Upon Exercise Of Put Optional right of debt instrument holders to convert debt instrument into cash, portion of principal amount Period of time between issuance and maturity of the revolving credit facility. Period Of Revolving Credit Facility Period of revolving credit facility Period of time between issuance and maturity of the term loan facility. Period Of Term Loan Facility Period of term loan facility Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer. Also includes the aggregate carrying amount, as of the balance sheet date, of current assets not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). Prepaid Expenses And Other Current Assets Prepaid expenses and other current assets The principal, or par, value of each note issued. Principal Amount Per Note Principal amount of notes per conversion Proceeds from Convertible Debt Proceeds from convertible senior notes issuance Proceeds from Issuance of Warrants Aggregate proceeds from the sale of warrants Proceeds from sale of warrants Proceeds from Long-term Lines of Credit Proceeds from borrowings under credit facility Proceeds from (Repurchase of) Equity Share repurchases Stock repurchase program settled amount Proceeds from Sale and Collection of Notes Receivable Proceeds from note receivable Proceeds from Stock Options Exercised Proceeds from exercise of stock options Promissory note. Promissory Note [Member] Promissory note [Member] The period over which payments are made to reduce the outstanding balance of the promissory note. Promissory Note Payable Period Promissory note payable period Property, Plant and Equipment, Net Property and equipment, net Range [Axis] Range [Axis] Range [Domain] Range [Domain] The realizable tax benefit expected from the one-time "check-the-box" election to treat a whole owned foreign subsidiary as a disregarded entity. Realizable Tax Benefit from Intercompany Receivable Write Off Realizable income tax benefit from check-the-box election Reconciliation of Assets from Segment to Consolidated [Table Text Block] Segment Assets Reimbursement Revenue Reimbursable expenses Related Party [Domain] Related Party [Domain] Related Party [Axis] Related Party [Axis] Repayments of Long-term Capital Lease Obligations Payments for capital lease obligations Repayments of Long-term Debt Repayments on credit facility Restricted Stock Awards [Member] Restricted Stock Awards [Member] Restricted Stock Awards [Member] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Restructuring and Related Activities Disclosure [Text Block] Restructuring Charges Restructuring Charges Restructuring charges Pretax restructuring charge incurred Restructuring Charges [Abstract] Restructuring Charges [Abstract] Restructuring Cost and Reserve [Line Items] Restructuring Charges [Line Items] Restructuring Reserve Restructuring charge liability Restructuring and Related Cost, Accelerated Depreciation Restructuring reserve related to accelerated depreciation Retained Earnings (Accumulated Deficit) Retained earnings Retained Earnings [Member] Retained Earnings [Member] Revenue Recognition, Policy [Policy Text Block] Revenue from Contracts with Customers Revenues Total revenues and reimbursable expenses Total revenues and reimbursable expenses Revenues [Abstract] Revenues and reimbursable expenses: Revolving Credit Facility [Member] Revolving Credit Facility [Member] Sales Revenue, Net [Member] Sales Revenue, Net [Member] Sales Revenue, Services, Net Revenues Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Components of Accumulated Other Comprehensive Loss, Net of Tax Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Intangible Assets Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of Anti-dilutive Securities Excluded From Computation of Weighted Average Common Stock Equivalents Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Summary of Carrying Amount and Estimated Fair Value of Convertible Senior Notes Comprehensive Income (Loss) [Table Text Block] Components of Other Comprehensive Income (Loss), Net of Tax Schedule of Long-term Debt Instruments [Table Text Block] Summary of Carrying Amounts of Debt Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Fair Value Interest Rate Swaps Designated as Cash Flow Hedging Instruments Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Basic and Diluted Earnings Per Share Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Schedule of Goodwill [Table Text Block] Changes in Carrying Amount of Goodwill Schedule Of Interest Expense On Convertible Senior Notes [Abstract] Schedule Of Interest Expense On Convertible Senior Notes [Abstract] Schedule Of Interest Expense On Convertible Senior Notes [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table Text Block] Components of Segment Information Secured Debt [Member] Term Loan Facility [Member] Segments [Domain] Segments [Domain] Geographical [Domain] Geographical [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Segment Reporting Information, Additional Elements for Bank Presentation [Abstract] Segment Assets: Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Segment Reporting Information, Profit (Loss) [Abstract] Components of Segment Information Segment Reporting, Policy [Policy Text Block] Segment Reporting Selling, General and Administrative Expense Selling, general and administrative expenses Senior Notes [Member] Convertible Notes [Member] Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Share-based Compensation Share-based compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Share Based Compensation Share Price Closing price of common stock Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Share Repurchase Program [Member] Share Repurchase Program [Member] February 2014 Share Repurchase Program [Member] Shares, Issued Ending Balance, shares Beginning Balance, shares Shares Paid for Tax Withholding for Share Based Compensation Shares redeemed for employee tax withholdings, shares Shorelight Holdings Llc [Member] Shorelight Holdings Llc [Member] Shorelight Holdings LLC [Member] Segments [Axis] Segments [Axis] Equity Components [Axis] Equity Components [Axis] Geographical [Axis] Geographical [Axis] Statement [Line Items] Statement [Line Items] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Stockholders' Equity Attributable to Parent Ending Balance Beginning Balance Total stockholders' equity Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock awards, net of cancellations, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options, shares Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Restricted stock awards, net of cancellations Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Equity Option [Member] Equity Option [Member] Stock Repurchased and Retired During Period, Shares Shares repurchased Share repurchases, shares Stock Repurchased and Retired During Period, Value Share repurchases Stock Repurchase Program, Authorized Amount Share repurchase authorized amount Subsequent Events [Abstract] Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information: Technology And Software [Member] Technology And Software [Member] Technology and software [Member] Trade Names [Member] Trade names [Member] Trading Symbol Trading Symbol Treasury Stock [Member] Treasury Stock [Member] Treasury Stock, Shares Treasury stock, shares Treasury Stock, Value Treasury stock, at cost, 2,077,798 and 1,993,769 shares at September 30, 2014 and December 31, 2013, respectively Revenues recognized in excess of billings, which are expected to be collected within one year of the balance sheet date, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Unbilled Services Net Current Unbilled services, net The unrealized tax benefit from our one-time "check-the-box" election to treat a wholly owned foreign subsidiary as a disregarded entity. Unrecognized Tax Benefit from Intercompany Receivable Write Off Unrecognized tax benefit from check-the-box election The percentage of variable-rate borrowings that are hedged by interest rate swaps. Variable Rate Borrowings Hedged Percentage Percentage of debt effectively fixed by interest rate swaps Vonlay Llc [Member] Vonlay Llc [Member] Vonlay LLC [Member] Warrant [Member] Warrant [Member] Washington DC [Member] Washington, D.C [Member] Washington, D.C [Member] Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average common stock equivalents Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted average common shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average shares used in calculating earnings per share: Weighted Average Number of Shares Outstanding, Basic Basic Weighted average common shares outstanding - basic Zero Coupon Convertible Senior Notes [Member] Zero Coupon Convertible Senior Notes [Member] Zero Coupon Convertible Notes [Member]