Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions		Total	Common Stock Issued	Additional Paid-in Capital	Treasury Stock	Retained Earnings	AOCI Attributable to Parent
Beginning Balance, Shares, Issued (in shares) at Dec. 31, 2013	[1]		51.2		5.2
Beginning Balance, Stockholders' Equity at Dec. 31, 2013	[1]	$ 434.0	$ 0.5	$ 254.3	$ (44.6)	$ 229.5	$ (5.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	[1]	42.7				42.7
Other comprehensive (loss) income, net of tax	[1]	(5.9)					(5.9)
Dividends declared	[1]	(10.8)				(10.8)
Stock-based compensation expense	[1]	6.1		6.1
Cash proceeds from exercise of common stock options (in shares)	[1]		0.2
Cash proceeds from exercise of common stock options, value	[1]	2.1		2.1
Excess tax deductions associated with stock-based compensation	[1]	2.8		2.8
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares)	[1]		0.2
Issuance of stock based instruments, net of shares withheld for employee taxes, value	[1]	(1.7)		(1.7)
Repurchase of common stock (in shares)	[1]				(0.4)
Repurchase of common stock, value	[1]	(8.0)			$ (8.0)
Ending Balance, Shares, Issued (in shares) at Dec. 31, 2014	[1]		51.6		5.6
Ending Balance, Stockholders' Equity at Dec. 31, 2014	[1]	461.3	$ 0.5	263.6	$ (52.6)	261.4	(11.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	[1]	51.5				51.5
Other comprehensive (loss) income, net of tax	[1]	(4.7)					(4.7)
Dividends declared	[1]	(12.9)				(12.9)
Stock-based compensation expense	[1]	8.7		8.7
Cash proceeds from exercise of common stock options (in shares)	[1]		0.2
Cash proceeds from exercise of common stock options, value	[1]	0.4		0.4
Excess tax deductions associated with stock-based compensation	[1]	2.2		2.2
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares)	[1]		0.2
Issuance of stock based instruments, net of shares withheld for employee taxes, value	[1]	(3.3)		(3.3)
Repurchase of common stock (in shares)	[1]				(0.2)
Repurchase of common stock, value	[1]	(9.2)			$ (9.2)
Ending Balance, Shares, Issued (in shares) at Dec. 31, 2015	[1]		52.0		5.8
Ending Balance, Stockholders' Equity at Dec. 31, 2015	[1]	494.0	$ 0.5	271.6	$ (61.8)	300.0	(16.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	[1]	54.2				54.2
Other comprehensive (loss) income, net of tax	[1]	2.1					2.1
Dividends declared	[1]	(15.5)				(15.5)
Stock-based compensation expense	[1]	6.1		6.1
Cash proceeds from exercise of common stock options (in shares)	[1]		0.1
Cash proceeds from exercise of common stock options, value	[1]	0.3		0.3
Excess tax deductions associated with stock-based compensation	[1]	2.9		2.9
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares)	[1]		0.1
Issuance of stock based instruments, net of shares withheld for employee taxes, value	[1]	(5.4)		(5.4)
Repurchase of common stock (in shares)	[1]				(0.2)
Repurchase of common stock, value	[1]	(8.9)			$ (8.9)
Ending Balance, Shares, Issued (in shares) at Dec. 31, 2016	[1]		52.2		6.0
Ending Balance, Stockholders' Equity at Dec. 31, 2016	[1]	$ 529.8	$ 0.5	$ 275.5	$ (70.7)	$ 338.7	$ (14.2)

[1] Amounts have been rounded for presentation purposes and might differ from unrounded results.