Non-Controlling Interests in Consolidated Subsidiaries and Funds (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interest [Line Items]
Redeemable non-controlling interests in consolidated subsidiaries and funds	$ 391,275	$ 216,923
Nonredeemable Noncontrolling Interest	485,595	281,803
Net Income (Loss) Attributable to Noncontrolling Interest	31,239	37,060	$ 23,791
Operating Entities
Noncontrolling Interest [Line Items]
Nonredeemable Noncontrolling Interest	11,513	7,457
Net Income (Loss) Attributable to Noncontrolling Interest	(3,264)	3,177	2,353
Consolidated Funds
Noncontrolling Interest [Line Items]
Redeemable non-controlling interests in consolidated subsidiaries and funds	391,275	216,923
Nonredeemable Noncontrolling Interest	82,807	57,423
Net Income (Loss) Attributable to Noncontrolling Interest	$ 34,503	$ 33,883	$ 21,438