Condensed Consolidated Statements Of Shareholders' Equity - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive (Loss) [Member]	Total
Balance at Dec. 31, 2014	$ 0.6	$ 1,134.4	$ 271.0	$ (261.4)	$ (495.5)	$ 649.1
Balance at Dec. 31, 2014	55,126,153
Balance at Dec. 31, 2014				5,057,382
Stock issuance	146,971
Share-based employee compensation		5.4				5.4
Net (loss) earnings			46.6			46.6
Other comprehensive income (loss)					(3.9)	(3.9)
Balance at Mar. 31, 2015	$ 0.6	1,139.8	317.6	$ (261.4)	(499.4)	697.2
Balance at Mar. 31, 2015	55,273,124
Balance at Mar. 31, 2015				5,057,382
Balance at Dec. 31, 2015	$ 0.6	1,151.8	365.2	$ (261.4)	(487.4)	$ 768.8
Balance at Dec. 31, 2015	55,359,064					55,359,064
Balance at Dec. 31, 2015				5,057,382		5,057,382
Stock issuance	118,493
Share-based employee compensation		0.6				$ 0.6
Net (loss) earnings			(9.9)			(9.9)
Other comprehensive income (loss)					10.8	10.8
Balance at Mar. 31, 2016	$ 0.6	$ 1,152.4	$ 355.3	$ (261.4)	$ (476.6)	$ 770.3
Balance at Mar. 31, 2016	55,477,557					55,477,557
Balance at Mar. 31, 2016				5,057,382		5,057,382