Condensed Consolidated Stockholders Equity Statement (Unaudited) - 6 months ended Jun. 28, 2015 - USD ($) shares in Thousands, $ 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 income	1,955			1,955
Foreign currency translation	10,193					10,193
Adjustment to pension and postretirement liability, net of $1.1 million tax	1,691					1,691
Net current period other comprehensive income	11,884
Exercise of stock options, net of tax withholding forfeitures	(6,037)		(5,942)		$ (95)
Exercise of stock options, net of tax withholding forfeitures, shares					93
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(5,403)		(6,362)		$ 959
Conversion of restricted stock units into common stock, net of tax withholding forfeitures, shares					111
Share-based compensation	15,179		15,179
Dividends ($0.10 per share)	(4,258)			(4,258)
Ending balance at Jun. 28, 2015	$ 820,506	$ 503	$ 598,264	$ 619,593	$ (363,707)	$ (34,147)
Ending balance, shares at Jun. 28, 2015		50,335			7,667