Non-Controlling Interests in Consolidated Subsidiaries and Funds (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Nonredeemable Noncontrolling Interest	$ 133,115		$ 199,624
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries and investment funds	4,562	$ (62,188)
Operating Entities
Noncontrolling Interest [Line Items]
Nonredeemable Noncontrolling Interest	92,629		83,818
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries and investment funds	7,661	127
Consolidated Funds
Noncontrolling Interest [Line Items]
Nonredeemable Noncontrolling Interest	40,486		$ 115,806
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries and investment funds	$ (3,099)	$ (62,315)