Condensed Consolidated Stockholders Equity Statement (Unaudited) (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2014	$ 807,186	$ 503	$ 595,389	$ 621,896	$ (364,571)	$ (46,031)
Beginning balance, shares at Dec. 31, 2014		50,335			(7,871)
Net loss	(19,636)			(19,636)
Foreign currency translation	13,065					13,065
Adjustment to pension and postretirement liability, net of $0.5 million tax	848					848
Net current period other comprehensive income	13,913
Exercise of stock options, net of tax withholding forfeitures	(5,826)		(5,702)		(124)
Exercise of stock options, net of tax withholding forfeitures, shares					86
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(5,016)		(5,546)		530
Conversion of restricted stock units into common stock, net of tax withholding forfeitures, shares					91
Share-based compensation	8,696		8,696
Dividends ($0.05 per share)	(2,102)			(2,102)
Ending balance at Mar. 29, 2015	$ 797,215	$ 503	$ 592,837	$ 600,158	$ (364,165)	$ (32,118)
Ending balance, shares at Mar. 29, 2015		50,335			(7,694)