Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 81,935	$ 169,381	$ 375,123	$ 498,739
Foreign currency translation adjustment and other (net of taxes (benefit) of $(409) and $(413) for the three and nine months ended September 28, 2019; and $(13) and $572 for the three and nine months ended September 29, 2018, respectively)	(11,679)	(8,907)	(9,458)	(27,924)
Unrealized loss on cash flow hedge (net of tax benefit of $1,327 and $5,396 for the three and nine months ended September 28, 2019, respectively)	(4,037)	0	(16,407)	0
Unrealized holding gain on available-for-sale investments (net of taxes of $5 and $286 for the three and nine months ended September 28, 2019; and $181 and $97 for the three and nine months ended September 29, 2018, respectively)	14	553	867	297
Comprehensive income	$ 66,233	$ 161,027	$ 350,125	$ 471,112