Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	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, 2021			45,400,000
Beginning balance at Dec. 31, 2021		$ (17.6)	$ 0.0	$ 0.0	$ (6.8)	$ (10.8)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock (in shares)			200,000
Repurchase of common stock (in shares)	(4,147,450)		(4,200,000)
Repurchase of common stock		(103.2)			(103.2)
Equity-based compensation		1.4		1.4
Foreign currency translation adjustment	$ (3.1)	(3.1)				(3.1)
Amortization related to derivatives securities, net of tax		2.2				2.2
Withholding tax related to stock option exercise and restricted stock vesting	(2.3)	(2.3)		(0.9)	(1.4)
Dividends		(0.8)			(0.8)
Net income		52.4			52.4
Ending balance (in shares) at Jun. 30, 2022			41,400,000
Ending balance at Jun. 30, 2022		(71.0)	$ 0.0	0.5	(59.8)	(11.7)
Beginning balance at Dec. 31, 2021							$ 0.0
Ending balance at Jun. 30, 2022							0.0
Beginning balance at Dec. 31, 2021	(17.6)
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Issuance of common stock	0.0
Repurchase of common stock	(103.2)
Equity-based compensation	1.4
Foreign currency translation adjustment	(3.1)
Amortization related to derivative securities, net of tax	2.2
Dividends ($0.02 per share)	(0.8)
Net income	52.4
Ending balance at Jun. 30, 2022	(71.0)
Beginning balance (in shares) at Mar. 31, 2022			41,400,000
Beginning balance at Mar. 31, 2022		(97.9)	$ 0.0	0.0	(88.0)	(9.9)
Increase (Decrease) in Stockholders' Equity
Equity-based compensation		0.5		0.5
Foreign currency translation adjustment	(2.4)	(2.4)				(2.4)
Amortization related to derivatives securities, net of tax	0.6	0.6				0.6
Dividends		(0.4)			(0.4)
Net income		28.6			28.6
Ending balance (in shares) at Jun. 30, 2022			41,400,000
Ending balance at Jun. 30, 2022		(71.0)	$ 0.0	0.5	(59.8)	(11.7)
Beginning balance at Mar. 31, 2022							0.0
Ending balance at Jun. 30, 2022							0.0
Beginning balance at Mar. 31, 2022	(97.9)
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Equity-based compensation	0.5
Foreign currency translation adjustment	(2.4)
Amortization related to derivative securities, net of tax	0.6
Dividends ($0.02 per share)	(0.4)
Net income	28.6
Ending balance at Jun. 30, 2022	(71.0)
Beginning balance (in shares) at Dec. 31, 2022			41,400,000
Beginning balance at Dec. 31, 2022		(21.6)	$ 0.0	1.5	(12.5)	(10.6)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock (in shares)			100,000
Equity-based compensation		0.7		0.7
Foreign currency translation adjustment	1.5	1.5				1.5
Amortization related to derivatives securities, net of tax		1.2				1.2
Withholding tax related to stock option exercise and restricted stock vesting	(0.7)	(0.7)		(0.7)
Dividends		(0.8)			(0.8)
Net income		23.4			23.4		0.1
Ending balance (in shares) at Jun. 30, 2023			41,500,000
Ending balance at Jun. 30, 2023		3.7	$ 0.0	1.5	10.1	(7.9)
Beginning balance at Dec. 31, 2022							0.0
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Capital contributions	(2.2)						(2.2)
Ending balance at Jun. 30, 2023							2.3
Beginning balance at Dec. 31, 2022	(21.6)
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Issuance of common stock	0.0
Capital contributions	(2.2)						(2.2)
Equity-based compensation	0.7
Foreign currency translation adjustment	1.5
Amortization related to derivative securities, net of tax	1.2
Dividends ($0.02 per share)	(0.8)
Net income	23.5
Ending balance at Jun. 30, 2023	6.0
Beginning balance (in shares) at Mar. 31, 2023			41,500,000
Beginning balance at Mar. 31, 2023		(8.7)	$ 0.0	1.4	(0.8)	(9.3)
Increase (Decrease) in Stockholders' Equity
Equity-based compensation		0.5		0.5
Foreign currency translation adjustment	0.8	0.8				0.8
Amortization related to derivatives securities, net of tax	0.6	0.6				0.6
Withholding tax related to stock option exercise and restricted stock vesting	(0.4)	(0.4)		(0.4)
Dividends		(0.5)			(0.5)
Net income		11.4			11.4		0.1
Ending balance (in shares) at Jun. 30, 2023			41,500,000
Ending balance at Jun. 30, 2023		$ 3.7	$ 0.0	$ 1.5	$ 10.1	$ (7.9)
Beginning balance at Mar. 31, 2023							0.4
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Capital contributions	(1.8)						(1.8)
Ending balance at Jun. 30, 2023							2.3
Beginning balance at Mar. 31, 2023	(8.3)
Increase (Decrease) in total equity and redeemable non-controlling interest in consolidated Funds
Capital contributions	(1.8)						$ (1.8)
Equity-based compensation	0.5
Foreign currency translation adjustment	0.8
Amortization related to derivative securities, net of tax	0.6
Dividends ($0.02 per share)	(0.5)
Net income	11.5
Ending balance at Jun. 30, 2023	$ 6.0