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(Loss) Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 24, 2016
Jun. 26, 2015
Jun. 24, 2016
Jun. 26, 2015
Net income per share:        
Basic (in dollars per share) $ (0.33) $ 0.13 $ (0.29) $ 0.17
Diluted (in dollars per share) $ (0.33) $ 0.13 $ (0.29) $ 0.17
Weighted average common shares:        
Basic (in shares) 25,912,686 25,726,851 25,898,368 25,196,704
Diluted (in shares) 25,912,686 26,884,238 25,898,368 25,246,749
Numerator:        
Net income $ (8,455) $ 3,363 $ (7,462) $ 4,331
Add effect of dilutive securities        
Interest on convertible notes, net of tax   132    
Adjusted net income $ (8,455) $ 3,495 $ (7,462) $ 4,331
Denominator:        
Weighted average basic common shares outstanding (in shares) 25,912,686 25,726,851 25,898,368 25,196,704
Dilutive effect of unvested common shares (in shares)   42,390   50,045
Dilutive effect of convertible notes   1,114,997    
Weighted average diluted common shares outstanding (in shares) 25,912,686 26,884,238 25,898,368 25,246,749