Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 115,038	$ 129,033	$ 225,972	$ 248,559
Foreign currency translation adjustment and other (net of taxes (benefit) of $(863) and $(2,229) for the three and six months ended July 4, 2015; and $(48) and $319 for the three and six months ended June 28, 2014)	5,616	5,042	(12,894)	8,069
Unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $(132) and $113 for the three and six months ended July 4, 2015; and $(55) and $7 for the three and six months ended June 28, 2014)	(212)	(85)	174	12
Comprehensive income	$ 120,442	$ 133,990	$ 213,252	$ 256,640