Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 112,907	$ 97,829	$ 222,947	$ 186,537
Foreign currency translation adjustment and other (net of taxes (benefit) of $(2,464) and $(618) for the three and six months ended June 29, 2013; and $96 and $(635) for the three and six months ended June 30, 2012)	(8,997)	(8,961)	(18,205)	(993)
Unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $(658) and $(543) for the three and six months ended June 29, 2013; and $17 and $17 for the three and six months ended June 30, 2012)	(1,036)	28	(860)	28
Comprehensive income	$ 102,874	$ 88,896	$ 203,882	$ 185,572