Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 155,900	$ 131,288	$ 343,069	$ 255,276
Other comprehensive income (loss), net of tax effects:
Foreign currency translation adjustments	5,788	1,108	(4,136)	(8,510)
Changes in defined benefit plan liabilities	(543)	450	(231)	419
Total other comprehensive income (loss), net of tax effects	5,245	1,558	(4,367)	(8,091)
Comprehensive income	$ 161,145	$ 132,846	$ 338,702	$ 247,185