Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 107,235	$ 75,149	$ 227,790	$ 148,034
Other comprehensive loss, net of tax effects:
Foreign currency translation adjustments	(1,815)	(19,110)	(592)	(7,052)
Changes in defined benefit plan liabilities	(107)	(2)	(2,625)	148
Total other comprehensive loss, net of tax effects	(1,922)	(19,112)	(3,217)	(6,904)
Comprehensive income	$ 105,313	$ 56,037	$ 224,573	$ 141,130

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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