Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021	Jan. 03, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 101,202	$ 82,552	$ 82,460
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net of tax of $0, $0, and $0, respectively	14	65	145
Reclassification adjustment for currency translation adjustments on planned disposal of a subsidiary, net of tax of $0, included in miscellaneous income, net on the consolidated statement of income			601
Unrealized gain/(loss) arising during the period on investments, net of tax of $2, $79 and $(114), respectively	(65)	(237)	347
Comprehensive income	$ 101,151	$ 82,380	$ 83,553