Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 23, 2020	Sep. 25, 2019	Sep. 23, 2020	Sep. 25, 2019
Statement of Other Comprehensive Income [Abstract]
Net income	$ 9,920	$ 6,402	$ 19,019	$ 21,402
Unrealized net (losses) gains arising during the period from interest rate swap	(36)	171	(1,791)	171
Reclassifications of losses (gains) into net income	114	(29)	156	(29)
Income tax (expense) benefit	(20)	(38)	441	(38)
Other comprehensive income (loss), net of taxes	58	104	(1,194)	104
Comprehensive income	$ 9,978	$ 6,506	$ 17,825	$ 21,506