Segment Reporting - Segment Breakout (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Segment Information
Total revenues		$ 410,592	$ 747,526
Depreciation and Amortization		7,185	4,354
Income tax expense (benefit)		11,889	54,428
Interest and Dividend Expense		46,524	57,641
Dividend expense		2,000	2,600
Dividend revenue		6,000	8,100
Consolidated Funds
Segment Information
Dividend revenue		0	2,600
Operating Segments
Segment Information
Non-Interest Revenue	[1]	370,251	696,217
Interest Revenue		40,339	51,307
Total revenues		410,592	747,526
Operating Segments | Consolidated Funds
Segment Information
Interest Revenue		2	2
OpCo | Operating Segments
Segment Information
Non-Interest Revenue		367,652	697,885
Interest Revenue		40,331	51,104
Total revenues		407,983	748,989
Interest Expense		43,300	53,803
Depreciation and Amortization		7,179	4,349
Income tax expense (benefit)		11,832	55,085
Asset Co | Operating Segments
Segment Information
Non-Interest Revenue		2,599	(1,668)
Interest Revenue		8	203
Total revenues		2,609	(1,463)
Interest Expense		1,236	1,275
Depreciation and Amortization		6	5
Income tax expense (benefit)		57	(657)
Asset Co | Operating Segments | Consolidated Funds
Segment Information
Interest Revenue		$ 2	$ 2

[1] Includes dividend revenue of $6.0 million and $8.1 million for the three months ended March 31, 2022 and 2021, respectively. In addition, includes dividend revenue, consolidated funds, of $0.0 million and $2.6 million for the three months ended March 31, 2022 and 2021, respectively.