Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 17,834	$ 5,983	$ 40,794	$ 1,810
Other comprehensive income (loss), before tax:
Change in unrealized gains and losses on derivatives	87	(418)	134	(15)
Other comprehensive income (loss), before tax	87	(418)	134	(15)
Tax benefit (provision) related to derivatives	(11)	54	(17)	1
Other comprehensive income (loss), net of tax	76	(364)	117	(14)
Comprehensive income	$ 17,910	$ 5,619	$ 40,911	$ 1,796