Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Consolidated Entity Excluding Consolidated Funds Total stockholders’ equity	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		0.9		0.9
Foreign currency translation adjustment	$ (0.7)	(0.7)				(0.7)
Amortization related to derivatives securities, net of tax		1.6				1.6
Withholding tax related to stock option exercise and restricted stock vesting	(2.3)	(2.3)		(0.9)	(1.4)
Dividends		(0.4)			(0.4)
Net income		23.8			23.8
Ending balance (in shares) at Mar. 31, 2022			41,400,000
Ending balance at Mar. 31, 2022		(97.9)	$ 0.0	0.0	(88.0)	(9.9)
Beginning balance at Dec. 31, 2021							$ 0.0
Ending balance at Mar. 31, 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	0.9
Foreign currency translation adjustment	(0.7)
Amortization related to derivative securities, net of tax	1.6
Dividends ($0.01 per share)	(0.4)
Net income	23.8
Ending balance at Mar. 31, 2022	$ (97.9)
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
Repurchase of common stock (in shares)	0
Equity-based compensation		0.2		0.2
Foreign currency translation adjustment	$ 0.7	0.7				0.7
Amortization related to derivatives securities, net of tax		0.6				0.6
Withholding tax related to stock option exercise and restricted stock vesting	(0.3)	(0.3)		(0.3)
Dividends		(0.3)			(0.3)
Net income		12.0			12.0
Ending balance (in shares) at Mar. 31, 2023			41,500,000
Ending balance at Mar. 31, 2023		$ (8.7)	$ 0.0	$ 1.4	$ (0.8)	$ (9.3)
Beginning balance at Dec. 31, 2022							0.0
Increase (Decrease) in redeemable non-controlling interest in consolidated Funds
Net capital contributions	0.4						0.4
Ending balance at Mar. 31, 2023							0.4
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
Net capital contributions	0.4						$ 0.4
Equity-based compensation	0.2
Foreign currency translation adjustment	0.7
Amortization related to derivative securities, net of tax	0.6
Dividends ($0.01 per share)	(0.3)
Net income	12.0
Ending balance at Mar. 31, 2023	$ (8.3)