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Income Taxes (Unrecognized) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 25, 2018
Dec. 26, 2017
Reconciliation of the beginning and ending liability for unrecognized tax benefits:    
Balance at the beginning of the period $ 806 $ 511
Additions to tax positions related to prior years 36 36
Additions to tax positions related to current year 754 389
Reductions due to statute expiration (114) (2)
Reductions due to exam settlement   (128)
Balance at the end of the period $ 1,482 $ 806