CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Net income	$ 176,191	$ 109,138
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of $0, $0, respectively	(8,779)	(4,659)
Available-for-sale marketable securities:
Unrealized gains on debt securities arising during period, net of tax of $187, $577, respectively	1,037	2,100
Less: Reclassification adjustment for gains included in net income, net of tax of $(145), $(20), respectively	(515)	(70)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	522	2,030
Defined benefit pension and post-retirement plans:
Amortization of prior service benefit included in net periodic pension and post-retirement benefit, net of tax of $0, $(11), respectively	(2)	(37)
Other comprehensive loss	(8,259)	(2,666)
Comprehensive income	$ 167,932	$ 106,472