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Stock-Based Compensation - Summary of Outstanding and Unvested Restricted Stock Activity (Details)
6 Months Ended
Jun. 18, 2019
$ / shares
shares
Shares  
Nonvested Shares, Beginning balance (in shares) | shares 1,234,531
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares 113,853
Vested (in shares) | shares (69,749)
Nonvested Shares, Ending balance (in shares) | shares 1,278,635
Weighted-Average Grant Date Fair Value  
Weighted-Average Grant Date Fair Value, Beginning balance (in dollars per share) | $ / shares $ 12.87
Weighted-Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares 10.56
Weighted-Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares 11.62
Weighted-Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares $ 12.73