Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2019	$ 1,922.3	$ 0.1	$ 1,696.7	$ 315.4	$ (89.9)
Beginning balance (in shares) at Dec. 31, 2019		64.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock	9.3		9.3
Stock-based compensation and vesting of restricted stock (in shares)		0.5
Net income/(loss)	(25.5)			(25.5)
Dividends declared	(20.4)			(20.4)
Total comprehensive loss, net of tax	111.0				111.0
Ending balance at Dec. 31, 2020	1,996.7	$ 0.1	1,706.0	269.5	21.1
Ending balance (in shares) at Dec. 31, 2020		64.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock	10.2		10.2
Stock-based compensation and vesting of restricted stock (in shares)		0.1
Issuance of common stock upon exercise of options	2.2		2.2
Issuance of common stock upon exercise of options (in shares)		0.1
Net income/(loss)	27.7			27.7
Dividends declared	(19.6)			(19.6)
Total comprehensive loss, net of tax	(32.1)				(32.1)
Ending balance at Dec. 31, 2021	1,985.1	$ 0.1	1,718.4	277.6	(11.0)
Ending balance (in shares) at Dec. 31, 2021		64.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock	9.2		9.2
Stock-based compensation and vesting of restricted stock (in shares)		0.4
Net income/(loss)	127.0			127.0
Dividends declared	(22.9)			(22.9)
Total comprehensive loss, net of tax	(96.0)				(96.0)
Ending balance at Dec. 31, 2022	$ 2,002.4	$ 0.1	$ 1,727.6	$ 381.7	$ (107.0)
Ending balance (in shares) at Dec. 31, 2022		65.3