Income Taxes and Other Receivables Income taxes and other receivables Income taxes and other receivables. (Gain) loss on Cash Surrender Value of Life Insurance Policies Gain on cash surrender value of life insurance policies Gain on cash surrender value of life insurance policies (Gain) loss on cash surrender value of life insurance policies. Consolidated Balance Sheets [Abstract] Assets [Abstract] ASSETS Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents at beginning of period Cash and cash equivalents Marketable Securities, Current Marketable Securities, Current, Total Marketable securities Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred Tax Assets, Net, Current, Total Deferred income taxes Assets, Current Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property and equipment, net Deferred Tax Assets, Net, Noncurrent Deferred Tax Assets, Net, Noncurrent, Total Deferred income taxes Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill Intangible Assets, Net (Excluding Goodwill) Intangible Assets, Net (Excluding Goodwill), Total Intangible assets, net Assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Stockholders' Equity [Abstract] Accounts Payable, Current Accounts Payable, Current, Total Accounts payable Other Accrued Liabilities, Current Other accrued liabilities Other accrued liabilities Liabilities, Current Liabilities, Current, Total Total current liabilities Other Liabilities, Noncurrent Other liabilities Liabilities Total liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common stock: $0.01 par value, 150,000 shares authorized, 58,548 and 57,614 shares issued and 46,388 and 45,979 shares outstanding, respectively Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income, net Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total stockholders' equity Total stockholders' equity Liabilities and Stockholders' Equity Total liabilities and stockholders' equity Total liabilities and stockholders' equity Consolidated Statements of Operations [Abstract] Sales Revenue, Services, Net Total revenue Fee revenue General and Administrative Expense General and Administrative Expense, Total General and administrative expenses Restructuring Charges Restructuring charges, net Restructuring (reductions) charges, net Operating Expenses Total operating expenses Total operating expenses Operating Income (Loss) Operating Income (Loss), Total Operating income (loss) Interest Expense Interest expense, net Interest expense, net Interest expense, net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest, Total Income (loss) before provision (benefit) for income taxes and equity in earnings of unconsolidated subsidiaries Income Tax Expense (Benefit) Income Tax Expense (Benefit), Total Income tax provision (benefit) Income (Loss) from Equity Method Investments Equity in earnings of unconsolidated subsidiaries, net Net Income (Loss) Attributable to Parent Net income (loss) Net income (loss) Basic and Diluted Earnings (Loss) Per Share [Abstract] Earnings (loss) per common share: Earnings Per Share, Basic Basic Earnings Per Share, Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic Basic Weighted Average Number of Shares Outstanding, Diluted Diluted Consolidated Statements of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash used in operating activities: Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization, Total Depreciation and amortization Share-based Compensation Share-based Compensation, Total Stock-based compensation expense Gain (Loss) on Disposition of Assets Loss on disposition of property and equipment Gain (Loss) on Disposition of Assets, Total Loss on disposition of property and equipment Provision for Doubtful Accounts Provision for doubtful accounts Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit), Total Deferred income taxes Increase (Decrease) in Operating Capital [Abstract] Change in other assets and liabilities: Increase (Decrease) in Deferred Compensation Deferred compensation Increase (Decrease) in Receivables Receivables Increase (Decrease) in Receivables, Total Receivables Increase (Decrease) in Prepaid Expense Prepaid expenses Prepaid expenses Increase (Decrease) in Accrued Income Taxes Payable Income taxes payable Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Accounts payable and accrued liabilities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Payments for (Proceeds from) Investments (Purchase of) proceeds from marketable securities, net Payments for (Proceeds from) Investments, Total Payments to Acquire Businesses, Net of Cash Acquired Cash paid for acquisitions, net of cash acquired and contingent consideration Payments to Acquire Businesses, Net of Cash Acquired, Total Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Payments for Repurchase of Common Stock Purchase of common stock Excess Tax Benefit from Share-based Compensation, Financing Activities Tax expense from exercise of stock options Net Cash Provided by (Used in) Financing Activities Net cash (used in) provided by financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net decrease in cash and cash equivalents Organization and Summary of Significant Accounting Policies [Abstract] Organization and Summary of Significant Accounting Policies [Abstract] Organization and Summary of Significant Accounting Policies. Business Segments [Abstract] Business Segments [Abstract] Business Segments. Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document And Entity Information. Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Common stock, shares issued Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Par or Stated Value Per Share Common stock, par value Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Significant Accounting Policies [Text Block] Organization and Summary of Significant Accounting Policies Comprehensive Income Comprehensive Income Note [Text Block] Employee Stock Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Marketable Securities [Text Block] Marketable Securities Restructuring and Related Activities Disclosure [Text Block] Restructuring Liability Segment Reporting Disclosure [Text Block] Business Segments Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Comprehensive Income [Abstract] Employee Stock Plans [Abstract] Marketable Securities [Abstract] Prepaid Expenses and Other Current Assets Prepaid expenses and other assets Prepaid expenses and other current assets. Investments and Other Non Current Assets Investments and other assets Investments and other non current assets. Less: notes receivable from stockholders Receivable from Shareholders or Affiliates for Issuance of Capital Stock Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent, Total Deferred compensation and other retirement plans Employee-related Liabilities, Current Employee-related Liabilities, Current, Total Compensation and benefits payable Accrued Income Taxes, Current Income taxes payable Cash Surrender Value of Life Insurance Cash surrender value of company owned life insurance policies, net of loans Accounts Receivable, Net, Current Accounts Receivable, Net, Current, Total Receivables due from clients, net of allowance for doubtful accounts of $8,106 and $5,983, respectively Sales Revenue, Services, Other Fee revenue Reimbursement Revenue Reimbursed out-of-pocket engagement expenses Labor and Related Expense Labor and Related Expense, Total Compensation and benefits Cost of Reimbursable Expense Out-of-pocket engagement expenses Nonoperating Income (Expense) Nonoperating Income (Expense), Total Other income, net Increase (Decrease) in Investment in Unconsolidated Subsidiaries Investment in unconsolidated subsidiaries Investment in unconsolidated subsidiaries Increase (decrease) in Investment in unconsolidated subsidiaries. Trading Securities, Unrealized Holding Gain Gain on marketable securities classified as trading Loss (gain) on marketable securities classified as trading Increase (Decrease) in Other Operating Assets and Liabilities, Net Other Other Payments to Acquire Life Insurance Policies Premiums on life insurance policies Proceeds from Dividends Received Dividends received from unconsolidated subsidiaries Proceeds from Issuance of Secured Debt Borrowings under life insurance policies Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Total Proceeds from issuance of common stock upon exercise of employee stock options and in connection with an employee stock purchase plan Basic and Diluted Earnings (Loss) Per Share Earnings Per Share [Text Block] Deferred Compensation and Retirement Plans Schedule of Defined Benefit Plans Disclosures [Text Block] Long-Term Debt Schedule of Line of Credit Facilities [Text Block] Restructuring Liability [Abstract] Deferred Compensation and Retirement Plans [Abstract] Long-Term Debt [Abstract] Stockholders' Equity Before Notes Receivable From Stockholders Stockholders' equity Stockholders' equity before notes receivable from stockholders. Payment Of Earnouts From Acquisitions Payment of contingent consideration from acquisitions Payment of earn-outs from acquisitions Payment of earn-outs from acquisitions. Proceeds from Issuance of Warrants Proceeds from exercise of warrants Marketable Securities Long Term Marketable securities, non-current Total debt and equity financial instruments including: (1) securities available-for-sale that will be held for the long term and (2) trading securities. Change In Fair Value of Acquisition-Related Contingent Consideration Change in fair value of acquisition-related contingent consideration Change in fair value of acquisition-related contingent consideration Change in fair value of acquisition-related contingent consideration. Payments to Acquire Intangible Assets Purchase of intangible assets