Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Net income	$ 27,925	$ 33,633	$ 60,141	$ 56,202
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(1,201)	(30,344)	(14,704)	(16,578)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(41)	(13)	(30)	22
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	299	299	598	598
Other Comprehensive Income (Loss), Net of Tax	(943)	(30,058)	(14,136)	(15,958)
Comprehensive Income, Net of Tax, Attributable to Parent	$ 26,982	$ 3,575	$ 46,005	$ 40,244