Consolidated Statements of Comprehensive Income Statement (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Earnings	$ 129,033	$ 112,907	$ 248,559	$ 222,947
Foreign currency translation adjustment and other (net of taxes (benefit) of $(48) and $319 for the three and six months ended June 28, 2014; and $(2,464) and $(618) for the three and six months ended June 29, 2013)	5,042	(8,997)	8,069	(18,205)
Unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $(55) and $7 for the three and six months ended June 28, 2014; and $(658) and $(543) for the three and six months ended June 29, 2013)	(85)	(1,036)	12	(860)
Comprehensive Income	$ 133,990	$ 102,874	$ 256,640	$ 203,882