Income Taxes - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2018	Sep. 26, 2018	Jun. 27, 2018	Mar. 28, 2018	Dec. 27, 2017	Sep. 27, 2017	Jun. 28, 2017	Mar. 29, 2017	Dec. 26, 2018	Dec. 27, 2017	Dec. 28, 2016
Current income taxes:
Federal									$ 0	$ 0	$ 0
State									220	250	224
Total current									220	250	224
Deferred income taxes:
Federal									(3,526)	1,495	9,660
State									98	192	2,730
Total deferred									(3,428)	1,687	12,390
Charge in lieu of tax (attributable to stock options)									0	0	169
Adjustment to deferred taxes for tax rate change									0	(1,440)	0
Tax provision for income taxes	$ (8,410)	$ 2,388	$ 865	$ 1,949	$ (4,757)	$ (2,457)	$ 4,244	$ 3,467	$ (3,208)	$ 497	$ 12,783