Segment Reporting - Segment Breakout (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Information
Total revenues		$ 1,537,723	$ 2,112,799	$ 1,755,926
Depreciation and Amortization		27,725	19,004	22,677
Income tax expense (benefit)		10,786	102,039	90,373
Interest and Dividend Expense		259,126	211,387	187,725
Dividend expense		73,000	6,800	8,100
Dividend revenue		158,700	26,000	17,300
Consolidated Funds
Segment Information
Interest and Dividend Expense		0	0	2,064
Dividend expense		0	0	700
Dividend revenue		0	0	2,500
Operating Segments
Segment Information
Non-Interest Revenue	[1]	1,384,266	1,919,569	1,583,106
Interest Revenue		153,457	193,221	170,128
Total revenues		1,537,723	2,112,799	1,755,926
Operating Segments | Consolidated Funds
Segment Information
Interest Revenue		0	9	2,692
OpCo | Operating Segments
Segment Information
Non-Interest Revenue		1,442,022	1,917,406	1,564,710
Interest Revenue		153,050	192,756	169,358
Total revenues		1,595,072	2,110,162	1,736,751
Interest Expense		180,983	199,570	173,537
Depreciation and Amortization		27,700	18,982	22,655
Income tax expense (benefit)		21,635	103,149	90,373
OpCo | Operating Segments | Consolidated Funds
Segment Information
Interest Revenue		0	0	2,683
Interest Expense		0	0	1,376
Asset Co | Operating Segments
Segment Information
Non-Interest Revenue		(57,756)	2,163	18,396
Interest Revenue		407	465	770
Total revenues		(57,349)	2,637	19,175
Interest Expense		5,100	5,035	6,120
Depreciation and Amortization		25	22	22
Income tax expense (benefit)		(10,849)	(1,110)	0
Asset Co | Operating Segments | Consolidated Funds
Segment Information
Interest Revenue		0	9	9
Interest Expense		$ 0	$ 0	$ 0

[1] Includes dividend revenue of $158.7 million, $26.0 million and $17.3 million for the year ended December 31, 2022, 2021 and 2020, respectively. Dividend revenue, consolidated funds, was $0.0 million, $0.0 million and $2.5 million for the year ended December 31, 2022, 2021 and 2020, respectively.