Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Income Taxes [Abstract]
Income taxes at federal statutory rate	$ 34,373	$ 18,615	$ 17,249
State income taxes, net of federal income tax benefit	7,261	1,333	639
Nondeductible employee-related expenses	2,223	1,974	768
2017 tax reform			657
Other	905	(1,261)	85
Provision for income taxes	$ 44,762	$ 20,661	$ 19,398
Effective tax rate	27.30%	23.30%	23.60%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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