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Subsidiary Issuer [Member] Operating lease costs Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Consolidated Funds and Partnerships: Variable Interest Entity, Consolidated, Nonoperating Income (Expense) [Abstract] Variable Interest Entity, Consolidated, Nonoperating Income (Expense) Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Warrant related asset Noncash Transaction, Warrants Related Asset Noncash Transaction, Warrants Related Asset Schedule of Equity Securities without Readily Determinable Fair Value Equity Securities without Readily Determinable Fair Value [Table Text Block] Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity Variable lease costs Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Non-controlling interests Equity, Attributable to Noncontrolling Interest 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Class, Including Two Class Method [Table Text Block] Name Trading Arrangement, Individual Name Total unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Fees receivable Increase (Decrease) In Fees Receivable Increase (Decrease) In Fees Receivable Secondary funds Secondary Funds [Member] Secondary Funds [Member] Compensation Related Costs [Abstract] Compensation Related Costs [Abstract] Company Selected Measure Amount Company Selected Measure Amount Proceeds received from Funds Proceeds from Equity Method Investment, Distribution Less: Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest [Abstract] Specialized funds Incentive Fee Revenue, Specialized Funds [Member] Incentive Fee Revenue, Specialized Funds [Member] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] 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