CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Net income	$ 256,718	$ 222,718	$ 790,549	$ 587,815
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of $0, $0, $0, $0, respectively	(10,698)	17,104	(26,672)	24,131
Available-for-sale marketable securities:
Unrealized (losses) gains on marketable securities arising during period, net of tax of $(44), $139, $(516), and $1,410, respectively	(176)	335	(1,952)	5,165
Less: Reclassification adjustment for gains included in net income, net of tax of $(65), $(194), $(186), $(615), respectively	(229)	(689)	(670)	(2,188)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	(405)	(354)	(2,622)	2,977
Defined benefit post-retirement plan:
Amortization of prior service credit, net of tax of $0, $0, $(2), $(1), respectively	(2)	(2)	(5)	(6)
Other comprehensive (loss) income	(11,105)	16,748	(29,299)	27,102
Comprehensive income	$ 245,613	$ 239,466	$ 761,250	$ 614,917