Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 98,887	$ 78,835	$ 285,424	$ 215,435
Foreign currency translation adjustment and other (net of taxes (benefit) of $(843) and $(1,478) for the three and nine months ended September 29, 2012; and $2,245 and $1,407 for the three and nine months ended October 1, 2011)	6,240	(23,358)	5,247	(7,465)
Change in net unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $321 and $338 for the three and nine months ended September 29, 2012)	518	0	546	0
Comprehensive income	$ 105,645	$ 55,477	$ 291,217	$ 207,970