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Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 25, 2019
Sep. 26, 2018
Sep. 25, 2019
Sep. 26, 2018
Dec. 26, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Common stock, options outstanding (shares) 2,302,225   2,302,225   2,102,404
Common stock, options vested (shares)     1,746,164    
Common stock, options unvested (shares) 556,061   556,061    
Number of options granted at fair market value (shares)     320,536    
Stock options exercised (shares)     (6,709)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price $ 7.91   $ 7.91   $ 7.68
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price     11.47    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price     $ 11.94    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period     (114,006)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price     $ 13.35    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 2,289,725   2,289,725    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price $ 7.90   $ 7.90    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 1,746,164   1,746,164    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 6.81   $ 6.81    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     28.70% 28.40%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     2.30% 2.90%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term     6 years 3 months 6 years 3 months  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate     0.00% 0.00%  
Unvested restricted shares outstanding (shares) 579,953   579,953   490,700
Shares granted (shares)     285,996    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 11.17   $ 11.17   $ 10.91
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 11.47    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period     (142,861)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value     $ 10.61    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited And Expirations In Period     (53,882)    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures And Expired Weighted Average Grant Date Fair Value     $ 11.81    
Stock-based compensation $ 700 $ 400 $ 1,797 $ 1,547  
Premium Options          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Common stock, options outstanding (shares) 1,381,010   1,381,010    
Employee Stock Option          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unrecognized compensation expense $ 1,900   $ 1,900    
Unrecognized compensation expense, period for recognition     3 years 2 months 2 days    
Restricted Stock          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unrecognized compensation expense, period for recognition     3 years    
Unvested restricted shares outstanding (shares) 455,230   455,230    
Unrecognized compensation expense $ 4,800   $ 4,800    
Performance Shares          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unrecognized compensation expense, period for recognition     3 years 7 months 13 days    
Unvested restricted shares outstanding (shares) 36,058   36,058    
Unrecognized compensation expense $ 100   $ 100    
Restricted Stock Units (RSUs)          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unrecognized compensation expense, period for recognition     2 years 9 months 5 days    
Unvested restricted shares outstanding (shares) 88,665   88,665    
Unrecognized compensation expense $ 900   $ 900