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Income Taxes - Components of Income Tax Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 25, 2016
Dec. 27, 2015
Dec. 28, 2014
Income Tax Disclosure [Abstract]      
Federal, Current $ 4,652 $ 2,450 $ 2,386
Federal, Deferred (1,386) 209 (467)
Federal, Total 3,266 2,659 1,919
State and Local, Current 1,426 1,047 622
State and Local, Deferred (273) (281) 178
State and Local, Total 1,153 766 800
Foreign, Current 24 41 29
Foreign, Total 24 41 29
Income tax expense $ 4,443 $ 3,466 $ 2,748