CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Net income	$ 188,908	$ 97,397	$ 365,098	$ 206,535
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of $0, $0, $0, $0, respectively	15,805	5,642	7,026	983
Available-for-sale marketable securities:
Unrealized gains on debt securities arising during period, net of tax of $1,084, $678, $1,271, $1,256, respectively	3,793	2,537	4,830	4,637
Less: Reclassification adjustment for gains included in net income, net of tax of $(277), $(6), $(421), $(26), respectively	(983)	(27)	(1,499)	(97)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	2,810	2,510	3,331	4,540
Defined benefit retirement plans:
Amortization of prior service credit, net of tax of $0, $(11), $(1), $(21), respectively	(2)	(37)	(3)	(74)
Other comprehensive income	18,613	8,115	10,354	5,449
Comprehensive income	$ 207,521	$ 105,512	$ 375,452	$ 211,984