CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Net income	$ 97,397	$ 101,037	$ 206,535	$ 188,010
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of $0	5,642	(29,323)	983	(18,781)
Available-for-sale marketable securities:
Unrealized gains (losses) on marketable securities arising during period, net of tax of $678, $(25), $1,256, $(744), respectively	2,537	198	4,637	(2,489)
Less: Reclassification adjustment for (gains) losses included in net income, net of tax of $(6), $(68), $(26), $11, respectively	(27)	(199)	(97)	1,469
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	2,510	(1)	4,540	(1,020)
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 $(11), $(18), $(21), $(35), respectively	(37)	(61)	(74)	(123)
Other comprehensive income (loss)	8,115	(29,385)	5,449	(19,924)
Comprehensive income	$ 105,512	$ 71,652	$ 211,984	$ 168,086

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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