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Income Taxes - Reconciliation of Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Expected income tax expense at statutory rate $ 8,594 $ 5,546 $ 4,943
Permanent differences 92 64 53
State tax expense, net of federal benefit 395 544 15
Foreign tax expense 132 236 168
Foreign tax credits (132) (236) (168)
Increase in unrecognized tax benefit 185 104 28
Valuation allowance 0 (317) 306
Other (147) (202) (33)
Income tax expense $ 9,119 $ 5,739 $ 5,312
Maximum      
Income Taxes [Line Items]      
Federal statutory tax rate   35.00%  
Domestic Tax Authority | Minimum      
Income Taxes [Line Items]      
Federal statutory tax rate     34.00%
Domestic Tax Authority | Maximum      
Income Taxes [Line Items]      
Federal statutory tax rate 35.00%