Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 30, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 147,159	$ 166,219
Foreign currency translation adjustment and other (net of taxes (benefit) of $425 and $(183), respectively)	(20,546)	2,321
Unrealized loss on cash flow hedge (net of tax benefit of $6,350 for the three months ended March 31, 2020	(19,308)	0
Unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $(279) and $210, respectively)	(849)	637
Comprehensive income	106,456	169,177
Foreign currency translation adjustment and other, taxes (benefit)	425	(183)
Unrealized loss on cash flow hedge, taxes (benefit)	(6,350)
Change in net unrealized holding gain (loss) on available-for-sale investments, taxes (benefit)	$ (279)	$ 210