Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 78,900	$ 87,506	$ 226,346	$ 106,841
Available-for-sale investments:
Net unrealized gain (loss) on available-for-sale investments, net of tax	(521)	(2,308)	(2,617)	6,282
Reclassification of credit loss (recovery) on investments into current operations	0	0	0	75
Reclassification of net realized (gain) loss on the sale of available-for-sale investments into current operations	(19)	(786)	(87)	(3,591)
Net change related to available-for-sale investments	(540)	(3,094)	(2,704)	2,766
Foreign currency translation adjustments:
Foreign currency translation adjustments	(2,136)	2,098	(5,243)	(3,364)
Other comprehensive income (loss), net of tax	(2,676)	(996)	(7,947)	(598)
Total comprehensive income	$ 76,224	$ 86,510	$ 218,399	$ 106,243