Income Taxes - Income tax expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2021	Dec. 31, 2020	Dec. 26, 2019
Current:
Federal	$ 13	$ (32,626)	$ 1,187
State	129	526	2,041
Deferred:
Federal	(12,629)	(24,751)	9,228
State	(3,214)	(14,085)	(136)
Income tax expense (benefit)	$ (15,701)	$ (70,936)	$ 12,320