Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 05, 2014	Jun. 29, 2013	Jul. 05, 2014	Jun. 29, 2013
Statement Of Comprehensive Income [Abstract]
Net unrealized income (loss) on hedging derivatives, tax effect	$ 100	$ 0	$ (1,000)	$ 0
Reclassification adjustment for (income) loss on settlement of hedging derivatives included in net earnings, tax effect	(100)	0	100	0
Foreign currency translation gain (loss), tax effect	$ 0	$ (200)	$ (400)	$ (200)