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Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Quarterly Financial Information [Table Text Block] Quarterly Financial Information [Table Text Block] Accelerated compensation cost Share-based Payment Arrangement, Accelerated Cost Property and equipment, net of accumulated depreciation and amortization Property and equipment, net of accumulated depreciation and amortization Property, Plant and Equipment, Net Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] Cover page. Cover [Abstract] Exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Document Type Document Type Early contract terminations Other Restructuring Costs Payments of debt Repayments of Long-term Debt Scenario, Unspecified [Domain] Scenario [Domain] DPM consideration holdback (see Note 13) Business Combination, Contingent Consideration, Liability Current liabilities: Liabilities, Current [Abstract] Other current assets Prepaid Expense and Other Assets, Current [Abstract] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Leased office facilities LeasedOfficeFacilitiesMember Forfeited or cancelled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Effect of exchange rate changes on cash Effect of Exchange 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An entity may also provide subtotals of geographic information about groups of countries. 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