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 (in shares)				(4.4)
Repurchase of common stock			(95.7)		(0.4)	(95.3)
Equity-based compensation			0.4		0.4
Foreign currency translation adjustment, net of tax	$ 0.0
Amortization related to derivatives securities, net of tax			1.3				1.3
Withholding tax related to restricted stock vesting	(1.8)		(1.8)			(1.8)
Dividends			(0.8)			(0.8)
Net income			25.6			25.6		$ 1.6
Ending balance (in shares) at Jun. 30, 2024				37.1
Ending balance at Jun. 30, 2024		(5.4)	(30.8)	$ 0.0	0.0	(25.4)	(5.4)
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 Jun. 30, 2024								12.0
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	(95.7)
Capital contributions	1.1							1.1
Equity-based compensation	0.4
Amortization related to derivative securities, net of tax	1.3
Withholding tax related to restricted stock vesting	(1.8)		(1.8)			(1.8)
Dividends	(0.8)
Net income	27.2
Ending balance at Jun. 30, 2024	(18.8)
Beginning balance (in shares) at Mar. 31, 2024				38.0
Beginning balance at Mar. 31, 2024		(6.2)	(21.7)	$ 0.0	0.0	(15.5)	(6.2)
Increase (Decrease) in Stockholders' Equity
Repurchases of common stock (in shares)				(0.9)
Repurchase of common stock			(20.7)		(0.2)	(20.5)
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			0.6				0.6
Dividends			(0.4)			(0.4)
Net income			11.0			11.0		0.5
Ending balance (in shares) at Jun. 30, 2024				37.1
Ending balance at Jun. 30, 2024		(5.4)	(30.8)	$ 0.0	0.0	(25.4)	(5.4)
Beginning balance at Mar. 31, 2024								11.5
Ending balance at Jun. 30, 2024								12.0
Beginning balance at Mar. 31, 2024	(10.2)
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Repurchase of common stock	(20.7)
Equity-based compensation	0.2
Foreign currency translation adjustment, net of tax	0.2
Amortization related to derivative securities, net of tax	0.6
Dividends	(0.4)
Net income	11.5
Ending balance at Jun. 30, 2024	(18.8)
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 (in shares)				(1.7)
Repurchase of common stock			(43.4)		(0.9)	(42.5)
Equity-based compensation			1.1		1.1
Foreign currency translation adjustment, net of tax	0.9		0.9				0.9
Amortization related to derivatives securities, net of tax			1.4				1.4
Withholding tax related to restricted stock vesting	(0.2)		(0.2)		(0.2)
Dividends			(0.8)			(0.8)
Net income			30.2			30.2		12.7
Ending balance (in shares) at Jun. 30, 2025				35.8
Ending balance at Jun. 30, 2025		(2.1)	9.2	$ 0.0	0.0	11.3	(2.1)
Beginning balance at Dec. 31, 2024								67.1
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Capital contributions	(2.1)							(2.1)
Ending balance at Jun. 30, 2025								77.7
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	(43.4)
Capital contributions	(2.1)							(2.1)
Equity-based compensation	1.1
Foreign currency translation adjustment, net of tax	0.9
Amortization related to derivative securities, net of tax	1.4
Withholding tax related to restricted stock vesting	(0.2)		(0.2)		(0.2)
Dividends	(0.8)
Net income	42.9
Ending balance at Jun. 30, 2025	86.9
Beginning balance (in shares) at Mar. 31, 2025				36.7
Beginning balance at Mar. 31, 2025		(3.2)	21.7	$ 0.0	0.0	24.9	(3.2)
Increase (Decrease) in Stockholders' Equity
Repurchases of common stock (in shares)				(0.9)
Repurchase of common stock			(23.8)		(0.5)	(23.3)
Equity-based compensation			0.5		0.5
Foreign currency translation adjustment, net of tax	0.4		0.4				0.4
Amortization related to derivatives securities, net of tax			0.7				0.7
Dividends			(0.4)			(0.4)
Net income			10.1			10.1		9.0
Ending balance (in shares) at Jun. 30, 2025				35.8
Ending balance at Jun. 30, 2025		$ (2.1)	$ 9.2	$ 0.0	$ 0.0	$ 11.3	$ (2.1)
Beginning balance at Mar. 31, 2025								70.8
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Capital contributions	(2.1)							(2.1)
Ending balance at Jun. 30, 2025								77.7
Beginning balance at Mar. 31, 2025	92.5
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Repurchase of common stock	(23.8)
Capital contributions	(2.1)							$ (2.1)
Equity-based compensation	0.5
Foreign currency translation adjustment, net of tax	0.4
Amortization related to derivative securities, net of tax	0.7
Dividends	(0.4)
Net income	19.1
Ending balance at Jun. 30, 2025	$ 86.9