Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 26, 2019
Noncurrent deferred income tax (liabilities) assets:
Accrued employee benefits	$ 16,685	$ 15,145
Depreciation and amortization	(82,964)	(69,100)
Operating lease assets	(58,704)	(62,339)
Operating lease liabilities	64,055	62,750
Net operating loss and tax credit carryforwards	21,526
Other	5,973	5,282
Net deferred tax liability	$ (33,429)	$ (48,262)