Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 25, 2020
Statements of Other Comprehensive Income [Abstract]
Net income	$ 3,964	$ 3,600
Unrealized net gains arising during the period from interest rate swap	78	1,459
Reclassifications of losses into net income	115	39
Income tax expense	(52)	(403)
Other comprehensive income (loss), net of taxes	141	(1,095)
Comprehensive income	$ 4,105	$ 2,505