Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings (Accumulated Deficit)	Treasury Stock	Noncontrolling Interests
Beginning balance (deficit) at Dec. 31, 2022	$ 225.7		$ 274.2	$ (1.8)	$ 73.6	$ (120.0)	$ (0.3)
Beginning balance (deficit) (in shares) at Dec. 31, 2022		23,276,329
Net income	9.3				8.4		0.9
Foreign currency translation	0.2			0.2
Issuance of restricted stock units	(0.4)		(0.4)
Issuance of restricted stock units (in shares)		148,806
Non-cash stock-based compensation	2.2		2.2
Noncontrolling interests buyout	(0.7)		(0.7)
Repurchases of common stock	(10.5)					(10.5)
Distributions to noncontrolling interests	(0.5)						(0.5)
Ending balance (deficit) at Mar. 31, 2023	225.3		275.3	(1.6)	82.0	(130.5)	0.1
Ending balance (deficit) (in shares) at Mar. 31, 2023		23,425,135
Beginning balance (deficit) at Dec. 31, 2023	$ 250.7		277.9	(1.3)	104.7	(130.5)	(0.1)
Beginning balance (deficit) (in shares) at Dec. 31, 2023	19,798,884	23,593,626
Net income	$ 8.5				7.6		0.9
Foreign currency translation	(0.2)			(0.2)
Non-cash stock-based compensation	2.3		2.3
Noncontrolling interests buyout	(0.1)		(0.1)
Other	0.1					0.1
Distributions to noncontrolling interests	(0.7)						(0.7)
Ending balance (deficit) at Mar. 31, 2024	$ 260.6		$ 280.1	$ (1.5)	$ 112.3	$ (130.4)	$ 0.1
Ending balance (deficit) (in shares) at Mar. 31, 2024	19,798,884	23,593,626