Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 97,829	$ 72,044	$ 186,537	$ 136,600
Foreign currency translation adjustment and other (net of tax of $96 and $(635) for the three and six months ended June 30, 2012; and $60 and $(838) for the three and six months ended July 2, 2011)	(8,961)	4,202	(993)	15,893
Change in net unrealized holding gain (loss) on available-for-sale investments (net of tax of $17 and $17 for the three and six months ended June 30, 2012)	28	0	28	0
Comprehensive income	$ 88,896	$ 76,246	$ 185,572	$ 152,493