Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 69,848	$ 20,477
Available-for-sale investments:
Net unrealized gain (loss) on available-for-sale investments, net of tax	(1,958)	(3,861)
Reclassification of credit loss (recovery) on investments into current operations	0	160
Reclassification of net realized (gain) loss on the sale of available-for-sale investments into current operations		(1,850)
Net change related to available-for-sale investments	(1,958)	(5,551)
Foreign currency translation adjustments:
Foreign currency translation adjustments	(2,770)	(7,365)
Other comprehensive income (loss), net of tax	(4,728)	(12,916)
Total comprehensive income	$ 65,120	$ 7,561