Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 166,454	$ 115,038	$ 316,814	$ 225,972
Foreign currency translation adjustment and other (net of taxes (benefit) of $33 and $2,155 for the three and six months ended July 2, 2016; and $(863) and $(2,229) for the three and six months ended July 4, 2015)	(14,762)	5,616	(6,472)	(12,894)
Unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $56 and $289 for the three and six months ended July 2, 2016; and $(132) and $113 for the three and six months ended July 4, 2015)	92	(212)	472	174
Comprehensive income	$ 151,784	$ 120,442	$ 310,814	$ 213,252