CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Common Stock	Treasury Stock at Cost	Additional Paid-in Capital	Accumulated Income	Total
Balances at beginning of period at Dec. 31, 2021	$ 1.0	$ (89.2)	$ 348.5	$ 310.5	$ 570.8
Balances at beginning of period (in shares) at Dec. 31, 2021	87,392,088
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation			5.6		5.6
Issuance of restricted stock, net (in shares)	704,864
Purchase of shares		(5.3)			(5.3)
Purchase of shares (in shares)	(298,386)
Net Income (Loss)				5.7	5.7
Balances at end of period at Mar. 31, 2022	$ 1.0	(94.5)	354.1	316.2	576.8
Balances at end of period (in shares) at Mar. 31, 2022	87,798,566
Balances at beginning of period at Dec. 31, 2021	$ 1.0	$ (89.2)	348.5	310.5	570.8
Balances at beginning of period (in shares) at Dec. 31, 2021	87,392,088
Increase (Decrease) in Stockholders' Deficit
Purchase of shares (in shares)		389,817
Net Income (Loss)					10.2
Balances at end of period at Sep. 30, 2022	$ 1.0	$ (96.2)	367.5	320.7	593.0
Balances at end of period (in shares) at Sep. 30, 2022	87,670,327
Balances at beginning of period at Mar. 31, 2022	$ 1.0	(94.5)	354.1	316.2	576.8
Balances at beginning of period (in shares) at Mar. 31, 2022	87,798,566
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation			6.3		6.3
Issuance of restricted stock, net (in shares)	(31,332)
Purchase of shares		(0.7)			(0.7)
Purchase of shares (in shares)	(35,149)
Net Income (Loss)				4.0	4.0
Balances at end of period at Jun. 30, 2022	$ 1.0	(95.2)	360.4	320.2	586.4
Balances at end of period (in shares) at Jun. 30, 2022	87,732,085
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation			7.1		7.1
Issuance of restricted stock, net (in shares)	(5,476)
Purchase of shares		$ (1.0)			(1.0)
Purchase of shares (in shares)	(56,282)	56,282
Net Income (Loss)				0.5	0.5
Balances at end of period at Sep. 30, 2022	$ 1.0	$ (96.2)	367.5	320.7	593.0
Balances at end of period (in shares) at Sep. 30, 2022	87,670,327
Balances at beginning of period at Dec. 31, 2022	$ 1.0	(108.6)	374.7	308.0	$ 575.1
Balances at beginning of period (in shares) at Dec. 31, 2022	86,417,733				86,417,733
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation			5.6		$ 5.6
Issuance of restricted stock, net (in shares)	1,783,965
Purchase of shares		(28.4)			(28.4)
Purchase of shares (in shares)	(2,642,178)
Net Income (Loss)				(38.0)	(38.0)
Balances at end of period at Mar. 31, 2023	$ 1.0	(137.0)	380.3	270.0	514.3
Balances at end of period (in shares) at Mar. 31, 2023	85,559,520
Balances at beginning of period at Dec. 31, 2022	$ 1.0	$ (108.6)	374.7	308.0	$ 575.1
Balances at beginning of period (in shares) at Dec. 31, 2022	86,417,733				86,417,733
Increase (Decrease) in Stockholders' Deficit
Purchase of shares (in shares)		4,543,871
Net Income (Loss)					$ (244.2)
Balances at end of period at Sep. 30, 2023	$ 1.0	$ (154.7)	388.9	63.8	$ 299.0
Balances at end of period (in shares) at Sep. 30, 2023	83,632,263				83,632,263
Balances at beginning of period at Mar. 31, 2023	$ 1.0	(137.0)	380.3	270.0	$ 514.3
Balances at beginning of period (in shares) at Mar. 31, 2023	85,559,520
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation			5.1		5.1
Issuance of restricted stock, net (in shares)	(8,493)
Purchase of shares		(17.5)			(17.5)
Purchase of shares (in shares)	(1,866,046)
Net Income (Loss)				(101.7)	(101.7)
Balances at end of period at Jun. 30, 2023	$ 1.0	(154.5)	385.4	168.3	400.2
Balances at end of period (in shares) at Jun. 30, 2023	83,684,981
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation			3.5		3.5
Issuance of restricted stock, net (in shares)	(17,071)
Purchase of shares		$ (0.2)			(0.2)
Purchase of shares (in shares)	(35,647)	35,647
Net Income (Loss)				(104.5)	(104.5)
Balances at end of period at Sep. 30, 2023	$ 1.0	$ (154.7)	$ 388.9	$ 63.8	$ 299.0
Balances at end of period (in shares) at Sep. 30, 2023	83,632,263				83,632,263