Condensed Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 29, 2015
Statement of Comprehensive Income [Abstract]
Net Income	$ 11,093	$ 36,417
Adjustment for previously unrecognized benefit plan gains and losses included in net income, net of taxes of $(37) and $(3) for the three months ended March 31, 2016 and March 29, 2015, respectively	(58)	(5)
Change in unrealized holding gain arising during the period, net of taxes of $(224) and $(605) for three months ended March 31, 2016 and March 29, 2015, respectively	(348)	(939)
Change in foreign currency translation adjustments, net of taxes of $66 and $(1,173) for the three months ended March 31, 2016 and March 29, 2015, respectively	4,043	(5,391)
Other Comprehensive Income (Loss), net of taxes	3,637	(6,335)
Comprehensive Income	$ 14,730	$ 30,082