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[Text Block] Q3 2023 Lexington Office Exit Q3 2023 Lexington Office Exit [Member] Q3 2023 Lexington Office Exit deferred tax liabilities Preferred stock investment deferred tax liabilities Preferred stock investment deferred tax liabilities Preferred stock investment Unrealized loss on investment, beginning balance Unrealized loss on investment, ending balance AOCI, Debt Securities, Available-for-sale, Adjustment, after Tax AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax Foreign Current Foreign Tax Expense (Benefit) Arrangement Duration Trading Arrangement Duration Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Components of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Restructuring charges Restructuring additions Restructuring Charges Business Combinations [Abstract] Business Combinations [Abstract] Tax credits / Section 199 Deduction Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Commissions Expense, Policy [Policy Text Block] Commissions Expense, Policy [Policy Text Block] Termination Date Trading Arrangement Termination Date Foreign currency translation adjustments, beginning balance Foreign currency translation adjustments, ending balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Common stock, shares authorized Common Stock, Shares Authorized Amortized capitalized software development costs Capitalized Computer Software, Amortization Number of Operating Industries Number of Operating Industries Number of Operating Industries Assets under Construction [Member] Asset under Construction [Member] Shorelight Holdings Llc [Member] Shorelight Holdings Llc [Member] Shorelight Holdings Llc [Member] Underlying Asset Class [Domain] Underlying Asset Class [Domain] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Measurement Input Type [Axis] Measurement Input Type [Axis] Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Award Timing Disclosures [Line Items] Schedule of Share-based Payment Arrangement, Performance-Based Option, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Arrangement, Performance-Based Option, Valuation Assumptions [Table Text Block] Share-based Payment Arrangement, Performance-Based Option, Valuation Assumptions Auditor [Table] Auditor [Table] Aggregate fair value of stock vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Convertible Debt Securities [Member] Convertible Debt Securities [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Income Taxes Income Tax, Policy [Policy Text Block] Prepaid Expense and Other Assets, Current Prepaid Expense and Other Assets, Current Finite-Lived Intangible Assets, Amortization Expense, Year Five Finite-Lived Intangible Asset, Expected Amortization, Year Three Insider Trading Arrangements [Line Items] Restricted stock granted as a percentage of purchased shares Share-Based Compensation Arrangement By Share-Based Payment Award, Restricted Stock Granted, As A Percentage Of Purchased Shares Share-Based Compensation Arrangement By Share-Based Payment Award, Restricted Stock Granted, As A Percentage Of Purchased Shares Related Party [Axis] Related Party, Type [Axis] Proceeds from Divestiture of Businesses, Net of Cash Divested Proceeds from Divestiture of Businesses, Net of Cash Divested Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] (Increase) decrease in other assets Increase (Decrease) in Other Operating Assets Foreign source income Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Finite-Lived Intangible Assets, Amortization Expense, Year Three Finite-Lived Intangible Asset, Expected Amortization, Year Two Adjustment to Compensation, Amount Adjustment to Compensation Amount Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Employee Severance [Member] Employee Severance [Member] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Auditor Name Auditor Name Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Axis] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Restricted stock awards, net of cancellations Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Actual consolidated leverage ratio Debt Instrument, Covenant, Actual Consolidated Leverage Ratio Debt Instrument, Covenant, Actual Consolidated Leverage Ratio Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Exercisable, weighted average exercise price (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Repayments of bank borrowings Repayments of Long-Term Debt Entity Central Index Key Entity Central Index Key Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs and Discounts Liabilities, Fair Value Disclosure [Abstract] Liabilities, Fair Value Disclosure [Abstract] Share-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Gross carrying amount Finite-Lived Intangible Assets, Gross Income Tax Authority [Domain] Income Tax Authority [Domain] Accrued payroll and related benefits Employee-related Liabilities, Current Stock options contractual term Share Based Compensation Arrangement By Share Based Payment Award Expiration Period One The contractual term of stock options, after which the stock options will expire. Other Restructuring [Member] Other Restructuring [Member] Name Trading Arrangement, Individual Name Other comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Contract Asset, Period Increase (Decrease) Contract Asset, Period Increase (Decrease) Amount of increase (decrease) in the right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than the passage of time. Legal Entity [Axis] Entity [Domain] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Amendment Flag Amendment Flag Intangible assets Finite-Lived Intangible Assets, Net [Abstract] Legal Entity [Axis] Legal Entity [Axis] Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Assets, Fair Value Disclosure [Abstract] Assets, Fair Value Disclosure [Abstract] Business Combinations Business Combinations Policy [Policy Text Block] Long-term debt Long-Term Debt, Excluding Current Maturities Leasehold Improvements [Member] Leasehold Improvements [Member] Performance-based stock options Performance-based stock options [Member] Performance-based stock options Diluted (shares) Weighted average common shares outstanding- diluted Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Deferred Tax Benefit Resulting from Gilti Tax - Carry Back 2018 Loss Effective Income Tax Rate Reconciliation, GILTI, Amount Capitalized Computer Software, Gross Capitalized Computer Software, Gross Interest expense, net of interest income Interest Income (Expense), Nonoperating, Net Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments And Contingencies [Table] Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Segment Reconciling Items [Member] Segment Reconciling Items [Member] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Vested, weighted average grant date fair value (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Deferred tax asset, operating lease liabilities Deferred tax asset, operating lease liabilities Deferred tax asset, operating lease liabilities Business Advisory [Member] Business Advisory [Member] Business Advisory [Member] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns Roll Forward [Table Text Block] Share Repurchase Program Share Repurchase Program [Member] Share Repurchase Program Net operating loss carry-forwards Deferred Tax Assets, Operating Loss Carryforwards Scenario [Axis] Scenario [Axis] Contract with Customer, Asset, after Allowance for Credit Loss Contract with Customer, Asset, after Allowance for Credit Loss Debt Instrument [Line Items] Debt Instrument [Line Items] Basic (shares) Weighted average common shares outstanding-basic Weighted Average Number of Shares Outstanding, Basic Optional increase In revolver Optional Increase In Revolver Optional increase in revolver. Deferred Tax Liabilities, Property, Plant and Equipment Deferred Tax Liabilities, Property, Plant and Equipment Property, Plant and Equipment, Other Types [Member] Property, Plant and Equipment, Other Types [Member] Revenues and reimbursable expenses: Revenues [Abstract] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement [Line Items] Fair Value Disclosures - Contingent Consideration Reconciliation [Abstract] Fair Value Disclosures - Contingent Consideration Reconciliation [Abstract] Fair Value Disclosures - Contingent Consideration Reconciliation [Abstract] Components of Segment Information Segment Reporting Information, Profit (Loss) [Abstract] Education [Member] Education [Member] Education [Member] Proceeds from bank borrowings Proceeds from Long-Term Lines of Credit Number of billing arrangements for revenue recognition Number Of Billing Arrangements For Revenue Recognition The number of billing arrangements the Company uses on client engagements. The nature of each arrangement will help determine the appropriate revenue recognition for that engagement.