CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY (USD $) In Millions, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, At Cost [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2009	$ 0.4	$ 180.5	$ (28.5)	$ 210.9	$ 1.4
Balances (in shares) at Dec. 31, 2009	36,451,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		2.4
Issuance of restricted stock		(0.4)	1.2
Issuance of restricted stock (in shares)	106,000
Restricted stock withheld for employee taxes		(0.4)	(0.4)
Restricted stock withheld for employee taxes (in shares)	(36,000)
Exercise of stock options		(1.8)	2.8
Exercise of stock options (in shares)	234,000
Income tax benefit on stock-based compensation		1.2
Change in cumulative translation adjustment					(2.6)	(2.6)
Net income (loss)				42.6		42.6
Balances at Dec. 31, 2010	0.4	181.5	(24.9)	253.5	(1.2)
Balances (in shares) at Dec. 31, 2010	36,755,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		1.8
Issuance of restricted stock		(1.4)	1.5
Issuance of restricted stock (in shares)	126,000
Exercise of stock options		(0.5)	0.8
Exercise of stock options (in shares)	68,000
Return of common stock			(7.9)
Return of common stock (in shares)	(550,000)
Surrender of fully vested options		(1.1)
Income tax benefit on stock-based compensation		0.2
Change in cumulative translation adjustment					(2.8)	(2.8)
Net income (loss)				54.4		54.4
Balances at Dec. 31, 2011	0.4	180.5	(30.5)	307.9	(4.0)	454.3
Balances (in shares) at Dec. 31, 2011	36,399,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense		4.0
Issuance of restricted stock		(0.4)	0.6
Issuance of restricted stock (in shares)	47,000
Exercise of stock options		(1.0)	1.3
Exercise of stock options (in shares)	109,000
Surrender of fully vested options		(0.7)
Income tax benefit on stock-based compensation		0.6
Change in cumulative translation adjustment					5.0	5.0
Dividends paid				(9.1)
Net income (loss)				(8.3)		(8.3)
Balances at Dec. 31, 2012	$ 0.4	$ 183.0	$ (28.6)	$ 290.5	$ 1.0	$ 446.3
Balances (in shares) at Dec. 31, 2012	36,555,000