CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock, At Cost	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balances (in shares) at Dec. 31, 2015		36,873
Balances at Dec. 31, 2015	$ 253.9	$ 0.4	$ 184.4	$ (24.5)	$ 109.4	$ (15.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1.7		1.7
Issuance of restricted stock (in shares)		51
Issuance of restricted stock	0.0		(0.6)	0.6
Dividends	(3.7)				(3.7)
Change in cumulative translation adjustment	(4.9)					(4.9)
Net income (loss)	(32.6)				(32.6)
Balances (in shares) at Dec. 31, 2016		36,924
Balances at Dec. 31, 2016	214.4	$ 0.4	185.5	(23.9)	73.1	(20.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1.6		1.6
Issuance of restricted stock (in shares)		68
Issuance of restricted stock	0.0		(0.8)	0.8
Stock withheld for employee taxes (in shares)		(48)
Stock withheld for employee taxes	(0.8)		(0.3)	(0.5)
Cancellation of restricted shares (in shares)		(8)
Cancellation of restricted shares	(0.1)		0.0	(0.1)
Proceeds from issuance of common stock (in shares)		158
Proceeds from issuance of common stock	2.4		0.5	1.9
Dividends	(68.7)				(68.7)
Discontinued European entities cumulative translation adjustment	14.4					14.4
Change in cumulative translation adjustment	8.2					8.2
Net income (loss)	40.4				40.4
Balances (in shares) at Dec. 31, 2017		37,094
Balances at Dec. 31, 2017	211.8	$ 0.4	186.5	(21.8)	44.8	1.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	2.8		2.8
Issuance of restricted stock (in shares)		117
Issuance of restricted stock	0.0		(1.7)	1.7
Stock withheld for employee taxes (in shares)		(62)
Stock withheld for employee taxes	(1.9)		0.0	(1.9)
Proceeds from issuance of common stock (in shares)		419
Proceeds from issuance of common stock	5.4		(0.6)	6.0
Dividends	(297.1)				(297.1)
Repurchase of treasury shares (in shares)		(233)
Repurchase of treasury shares	(9.1)			(9.1)
Discontinued France operations cumulative translation adjustment	4.1					4.1
Change in cumulative translation adjustment	(3.0)					(3.0)
Net income (loss)	224.7				224.7
Balances (in shares) at Dec. 31, 2018		37,335
Balances at Dec. 31, 2018	$ 137.7	$ 0.4	$ 187.0	$ (25.1)	$ (27.6)	$ 3.0