Condensed 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, 2017	$ 396.7	$ 0.0	$ 223.3	$ 223.2	$ (49.9)
Beginning balance (in shares) at Dec. 31, 2017		29.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock, net of withholdings	1.2		1.2
Net income	28.0			28.0
Dividends declared	(10.0)			(10.0)
Change in fair value of derivative financial instruments, net of tax	1.1				1.1
Minimum pension adjustment, net of tax	4.4				4.4
Foreign currency translation adjustment	(8.5)				(8.5)
Ending balance at Jun. 30, 2018	412.9	$ 0.0	224.5	241.2	(52.9)
Ending balance (in shares) at Jun. 30, 2018		29.1
Beginning balance at Mar. 31, 2018	413.0	$ 0.0	223.2	227.2	(37.4)
Beginning balance (in shares) at Mar. 31, 2018		29.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock, net of withholdings	1.3		1.3
Net income	19.0			19.0
Dividends declared	(5.0)			(5.0)
Change in fair value of derivative financial instruments, net of tax	0.7				0.7
Foreign currency translation adjustment	(16.2)				(16.2)
Ending balance at Jun. 30, 2018	412.9	$ 0.0	224.5	241.2	(52.9)
Ending balance (in shares) at Jun. 30, 2018		29.1
Beginning balance at Dec. 31, 2018	1,848.2	$ 0.1	1,687.1	232.6	(71.6)
Beginning balance (in shares) at Dec. 31, 2018		64.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock, net of withholdings	4.7		4.7
Stock-based compensation and vesting of restricted stock, net of withholdings, (in shares)		0.1
Net income	64.2			64.2
Dividends declared	(22.3)			(22.3)
Change in fair value of derivative financial instruments, net of tax	(2.5)				(2.5)
Minimum pension adjustment, net of tax	(0.3)				(0.3)
Foreign currency translation adjustment	(7.6)				(7.6)
Ending balance at Jun. 30, 2019	1,884.4	$ 0.1	1,691.8	274.5	(82.0)
Ending balance (in shares) at Jun. 30, 2019		64.3
Beginning balance at Mar. 31, 2019	1,872.4	$ 0.1	1,688.5	256.7	(72.9)
Beginning balance (in shares) at Mar. 31, 2019		64.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation and vesting of restricted stock, net of withholdings	3.3		3.3
Net income	29.0			29.0
Dividends declared	(11.2)			(11.2)
Change in fair value of derivative financial instruments, net of tax	(14.0)				(14.0)
Foreign currency translation adjustment	4.9				4.9
Ending balance at Jun. 30, 2019	$ 1,884.4	$ 0.1	$ 1,691.8	$ 274.5	$ (82.0)
Ending balance (in shares) at Jun. 30, 2019		64.3