Earnings Per Share - Computation of Basic and Diluted Net Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 30, 2020	Dec. 25, 2019	Dec. 26, 2018
Numerator:
Net income (loss)	$ 24,474	$ 24,900	$ (8,994)
Denominator:
Weighted-average shares outstanding-Basic (shares)	35,193,325	36,739,209	38,574,553
Weighted-average shares outstanding-Diluted (shares)	35,796,406	37,441,503	38,574,553
Net income (loss) per share-Basic (usd per share)	$ 0.70	$ 0.68	$ (0.23)
Net income (loss) per share-Diluted (usd per share)	$ 0.68	$ 0.67	$ (0.23)
Anti-dilutive securities not considered in diluted EPS calculation (shares)	81,041	526,295	2,593,104