CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 24,113	$ (4,404)
Other comprehensive loss, net of tax:
Change in net unrealized losses on available-for-sale marketable securities	(131)	(526)
Change in currency translation adjustments	(1,899)	(2,231)
Total other comprehensive loss, net of tax	(2,030)	(2,757)
Total comprehensive income (loss)	$ 22,083	$ (7,161)