Stockholders' Equity - Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Amounts Reclassified from AOCI
Operating expenses	$ (120,452)	$ (110,270)	$ (364,913)	$ (333,545)
Income before income taxes	3,062	21,866	3,277	38,031
Income tax expense (benefit)	(100)	1,685	(306)	28,481
Net income	3,162	20,181	3,583	9,550
Reclassifications From Accumulated Other Comprehensive Income (Loss)
Amounts Reclassified from AOCI
Income before income taxes	191	14	(350)	(417)
Income tax expense (benefit)	40	3	(73)	(88)
Net income	151	11	(277)	(329)
Reclassifications From Accumulated Other Comprehensive Income (Loss) | Gains on available-for-sales securities
Amounts Reclassified from AOCI
Interest income and other, net	253	188	475	188
Reclassifications From Accumulated Other Comprehensive Income (Loss) | Losses on cash flow hedges
Amounts Reclassified from AOCI
Operating expenses	$ (62)	$ (174)	$ (825)	$ (605)