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Income Taxes (Components of Income Tax Expense (Benefit) from Continuing Operations) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 27, 2019
Dec. 28, 2018
Dec. 29, 2017
Current tax expense      
Federal $ 5,451 $ 3,068 $ 3,231
State 1,032 721 445
Foreign 262 1,565 669
Current Income Tax Expense (Benefit), Total 6,745 5,354 4,345
Deferred tax expense (benefit)      
Federal 425 220 (2,915)
State 670 365 209
Foreign (96) (362) 925
Deferred Income Tax Expense (Benefit) 999 223 (1,781)
Income tax expense from continuing operations $ 7,744 $ 5,577 $ 2,564