Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Statement Of Comprehensive Income [Abstract]
Net unrealized loss on hedging derivatives, net of income taxes	$ (1,000)	$ (1,300)
Reclassification adjustment for loss on settlement of hedging derivatives included in net income, net of income taxes	1,700	100
Foreign currency translation gain (loss), tax effect	$ 0	$ 0