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, 2013	$ 836,541	$ 503	$ 585,753	$ 556,214	$ (276,748)	$ (29,181)
Beginning balance, shares at Dec. 31, 2013		50,335			6,880
Net income	24,594			24,594
Foreign currency translation, net of $1.7 million tax	(12,473)					(12,473)
Adjustment to pension and postretirement liability, net of $0.7 million tax	1,160					1,160
Net current period other comprehensive income (loss)	(11,313)
Exercise of stock options, net of tax withholding forfeitures	(3,615)		(5,336)		1,721
Exercise of stock options, net of tax withholding forfeitures, shares					92
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,826)		(2,949)		1,123
Conversion of restricted stock units into common stock, net of tax withholding forfeitures, shares					53
Share-based compensation	7,830		7,830
Dividends ($0.05 per share)	(2,209)			(2,209)
Ending balance at Mar. 30, 2014	$ 850,002	$ 503	$ 585,298	$ 578,599	$ (273,904)	$ (40,494)
Ending balance, shares at Mar. 30, 2014		50,335			6,735