Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Accumulated other comprehensive income (loss)	Consolidated Entity Excluding Consolidated Funds Total stockholders’ equity (deficit)	Consolidated Entity Excluding Consolidated Funds Common Stock	Consolidated Entity Excluding Consolidated Funds Additional paid-in capital	Consolidated Entity Excluding Consolidated Funds Retained earnings (deficit)	Consolidated Entity Excluding Consolidated Funds Accumulated other comprehensive income (loss)	Consolidated Funds
Beginning balance (in shares) at Dec. 31, 2023				41.4
Beginning balance at Dec. 31, 2023		$ (6.7)	$ 40.2	$ 0.0	$ 0.0	$ 46.9	$ (6.7)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock (in shares)				0.1
Repurchases of common stock including excise taxes (in shares)				(3.5)
Repurchase of common stock including excise taxes			(75.0)		(0.2)	(74.8)
Equity-based compensation			0.2		0.2
Foreign currency translation adjustment, net of tax	$ (0.2)		(0.2)				(0.2)
Amortization related to derivatives securities, net of tax			0.7				0.7
Withholding tax related to restricted stock vesting	(1.8)		(1.8)			(1.8)
Dividends			(0.4)			(0.4)
Net income			14.6			14.6		$ 1.1
Ending balance (in shares) at Mar. 31, 2024				38.0
Ending balance at Mar. 31, 2024		(6.2)	(21.7)	$ 0.0	0.0	(15.5)	(6.2)
Beginning balance at Dec. 31, 2023								9.3
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Capital contributions	1.1							1.1
Ending balance at Mar. 31, 2024								11.5
Beginning balance at Dec. 31, 2023	49.5
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Repurchase of common stock including excise taxes	(75.0)
Capital contributions	1.1							1.1
Equity-based compensation	0.2
Foreign currency translation adjustment, net of tax	(0.2)
Amortization related to derivative securities, net of tax	0.7
Withholding tax related to restricted stock vesting	(1.8)		(1.8)			(1.8)
Dividends	(0.4)
Net income	15.7
Ending balance at Mar. 31, 2024	(10.2)
Beginning balance (in shares) at Dec. 31, 2024				37.5
Beginning balance at Dec. 31, 2024		(4.4)	20.0	$ 0.0	0.0	24.4	(4.4)
Increase (Decrease) in Stockholders' Equity
Repurchases of common stock including excise taxes (in shares)				(0.8)
Repurchase of common stock including excise taxes			(19.6)		(0.4)	(19.2)
Equity-based compensation			0.6		0.6
Foreign currency translation adjustment, net of tax	0.5		0.5				0.5
Amortization related to derivatives securities, net of tax			0.7				0.7
Withholding tax related to restricted stock vesting	(0.2)		(0.2)		(0.2)
Dividends			(0.4)			(0.4)
Net income			20.1			20.1		3.7
Ending balance (in shares) at Mar. 31, 2025				36.7
Ending balance at Mar. 31, 2025		$ (3.2)	21.7	$ 0.0	0.0	$ 24.9	$ (3.2)
Beginning balance at Dec. 31, 2024								67.1
Ending balance at Mar. 31, 2025								$ 70.8
Beginning balance at Dec. 31, 2024	87.1
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Repurchase of common stock including excise taxes	(19.6)
Equity-based compensation	0.6
Foreign currency translation adjustment, net of tax	0.5
Amortization related to derivative securities, net of tax	0.7
Withholding tax related to restricted stock vesting	(0.2)		$ (0.2)		$ (0.2)
Dividends	(0.4)
Net income	23.8
Ending balance at Mar. 31, 2025	$ 92.5