Statement of Consolidated Stockholders' Equity - USD ($) $ in Millions		Total	Common Stock	Additional Paid In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Before Cumulative Adjustment	Before Cumulative Adjustment Common Stock	Before Cumulative Adjustment Additional Paid In Capital	Before Cumulative Adjustment Retained Earnings	Before Cumulative Adjustment Treasury Stock	Before Cumulative Adjustment Accumulated Other Comprehensive Loss	Cumulative-effect adjustment	Cumulative-effect adjustment Common Stock	Cumulative-effect adjustment Additional Paid In Capital	Cumulative-effect adjustment Retained Earnings	Cumulative-effect adjustment Treasury Stock	Cumulative-effect adjustment Accumulated Other Comprehensive Loss
Beginning balance, shares at Dec. 31, 2016															17,651,461
Beginning balance at Dec. 31, 2016														$ 804.7	$ 0.2	$ 1,047.4	$ 75.2	$ (281.4)	$ (36.7)
Stockholders' Equity [Roll Forward]
Net income		$ 45.4			$ 45.4
Common shares issued (including impacts from Long-Term Incentive programs) (shares)			117,751
Common shares issued (including impacts from Long-Term Incentive programs)		0.2		$ 0.2
Cancellation of employee non-vested shares, shares			(451)
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares, shares			(56,495)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares		(4.5)		(4.5)
Repurchase of common stock, shares	[1]		(938,680)
Repurchase of common stock	[1]	(77.8)				$ (77.8)
Cancellation of treasury stock		0.0		(0.2)	0.4	0.6
Cash dividends on common stock	[2]	(35.0)			(35.0)
Amortization of unearned equity compensation		13.0		13.0
Ending balance, shares at Dec. 31, 2017									16,773,586
Ending balance at Dec. 31, 2017							$ (36.7)	$ 746.3	$ 0.2	$ 1,055.9	$ 85.5	$ (358.6)	$ (36.7)
Stockholders' Equity [Roll Forward]
Net income		91.7			91.7
Other comprehensive income (loss), net of tax		(11.7)					(11.7)
Common shares issued (including impacts from Long-Term Incentive programs) (shares)			146,363
Common shares issued (including impacts from Long-Term Incentive programs)				0.2
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares, shares			(68,195)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares		(6.9)		(6.9)
Repurchase of common stock, shares	[1]		(617,151)
Repurchase of common stock	[1]	(61.9)				(61.9)
Cash dividends on common stock	[2]	(37.7)			(37.7)
Amortization of unearned equity compensation		$ 10.1		10.1
Ending balance, shares at Dec. 31, 2018		16,234,603	16,234,603
Ending balance at Dec. 31, 2018		$ 740.4	$ 0.2	1,059.3	150.2	(420.5)	(48.8)
Stockholders' Equity [Roll Forward]
Net income		62.0			62.0
Other comprehensive income (loss), net of tax		10.2					10.2
Common shares issued (including impacts from Long-Term Incentive programs) (shares)			137,905
Common shares issued (including impacts from Long-Term Incentive programs)		0.3		0.3
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares, shares			(58,783)
Cancellation of shares to cover employees' tax withholdings upon vesting of non-vested shares		(6.2)		(6.2)
Repurchase of common stock, shares	[1]		(445,421)
Repurchase of common stock	[1]	(42.9)				(42.9)
Cash dividends on common stock	[2]	(39.4)			(39.4)
Amortization of unearned equity compensation		$ 9.5		9.5
Ending balance, shares at Dec. 31, 2019		15,868,304	15,868,304
Ending balance at Dec. 31, 2019		$ 733.9	$ 0.2	$ 1,062.9	$ 172.8	$ (463.4)	$ (38.6)

[1] Weighted-average repurchase price (dollars per share) for the years ended December 31, 2019, December 31, 2018 and December 31, 2017 was $96.18, $100.28 and $82.97, respectively. At December 31, 2019, $105.6 million remained available to repurchase our common shares pursuant to the stock repurchase program.

[2] Dividends declared per common share were $2.40, $2.20 and $2.00 during 2019, 2018 and 2017, respectively.