Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 30, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 120,555	$ 72,885
Other comprehensive income (loss), net of tax effects:
Foreign currency translation adjustments	1,223	12,058
Changes in defined benefit plan liabilities	(2,518)	150
Total other comprehensive income (loss), net of tax effects	(1,295)	12,208
Comprehensive income	$ 119,260	$ 85,093

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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