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 Interest
Beginning balance (deficit) at Dec. 31, 2019	$ 373.9	$ 0.0	$ 262.6	$ (2.7)	$ 169.5	$ (55.3)	$ (0.2)
Beginning balance (deficit) (in shares) at Dec. 31, 2019		22,950,360
Net income (loss)	(45.6)				(46.1)		0.5
Foreign currency translation	(0.2)			(0.2)
Change in fair value of interest rate collars	(2.8)			(2.8)
Issuance of performance stock units	0.0
Issuance of performance stock units (in shares)		46,701
Non-cash stock-based compensation	(2.9)		(2.9)
Treasury stock	(15.3)					(15.3)
Distributions to noncontrolling interest	(0.5)						(0.5)
Ending balance (deficit) at Mar. 31, 2020	306.6		259.7	(5.7)	123.4	(70.6)	(0.2)
Ending balance (deficit) (in shares) at Mar. 31, 2020		22,997,061
Beginning balance (deficit) at Dec. 31, 2020	$ 181.4		261.4	(4.4)	(3.3)	(70.6)	(1.7)
Beginning balance (deficit) (in shares) at Dec. 31, 2020	23,088,386	23,088,386
Net income (loss)	$ 3.9				2.3		1.6
Change in fair value of interest rate collars	0.4			0.4
Issuance of restricted stock units	0.0
Issuance of restricted stock units (in shares)		35,902
Issuance of performance stock units	0.0
Issuance of performance stock units (in shares)		81,136
Non-cash stock-based compensation	0.9		0.9
Distributions to noncontrolling interest	(0.4)						(0.4)
Ending balance (deficit) at Mar. 31, 2021	$ 186.2		$ 262.3	$ (4.0)	$ (1.0)	$ (70.6)	$ (0.5)
Ending balance (deficit) (in shares) at Mar. 31, 2021	23,205,424	23,205,424