Redeemable Noncontrolling Interests in Subsidiaries - Changes in Redeemable Noncontrolling Interest in Subsidiaries (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	$ 25,845	$ 61,821	$ 63,202
Net Income (Loss)	116	5,801	(4,932)
Other Comprehensive Income (Loss), net of tax	(687)	585	(2,329)
Subscriptions—Redeemable Noncontrolling Interest Holders	69,144	72,823	55,171
Consolidation/(Deconsolidation)	(7,646)	(75,225)	(435)
Stock Award Activity			707
Distributions to Noncontrolling Interests in Subsidiaries	(31,258)	(39,960)	(25,979)
Acquisition of Remaining Equity of FHL			(37,805)
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests			14,221
Balance, end of period	55,514	25,845	61,821
Consolidated Investment Companies
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	14,341	50,317	24,659
Net Income (Loss)	(643)	5,311	(6,320)
Other Comprehensive Income (Loss), net of tax	(1,049)	(8)	0
Subscriptions—Redeemable Noncontrolling Interest Holders	68,513	72,463	53,040
Consolidation/(Deconsolidation)	(7,646)	(75,225)	(435)
Stock Award Activity			0
Distributions to Noncontrolling Interests in Subsidiaries	(28,431)	(38,517)	(20,627)
Acquisition of Remaining Equity of FHL			0
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests			0
Balance, end of period	45,085	14,341	50,317
FHL and other entities
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	11,504	11,504	38,543
Net Income (Loss)	759	490	1,388
Other Comprehensive Income (Loss), net of tax	362	593	(2,329)
Subscriptions—Redeemable Noncontrolling Interest Holders	631	360	2,131
Consolidation/(Deconsolidation)	0	0	0
Stock Award Activity			707
Distributions to Noncontrolling Interests in Subsidiaries	(2,827)	(1,443)	(5,352)
Acquisition of Remaining Equity of FHL			(37,805)
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests			14,221
Balance, end of period	$ 10,429	$ 11,504	$ 11,504