Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Restricted Stock and Restricted Stock Units, during Period (Details)

v3.10.0.1
Stock-Based Compensation - Restricted Stock and Restricted Stock Units, during Period (Details) - $ / shares
9 Months Ended
Mar. 26, 2018
Sep. 30, 2018
Restricted Stock    
Restricted Stock and Restricted Stock Units    
Outstanding at beginning of period (shares)   105,666
Granted (shares)   156,653
Forfeited (shares)   (105,666)
Vested (shares)   0
Outstanding at end of period (shares)   156,653
Grant Date Fair Value    
Outstanding at beginning of period (USD per share)   $ 7.95
Granted (USD per share)   7.57
Forfeited (USD per share)   7.95
Vested (USD per share)   0.00
Outstanding at end of period (USD per share)   $ 7.57
Restricted Stock Units    
Restricted Stock and Restricted Stock Units    
Outstanding at beginning of period (shares)   713,939
Granted (shares)   523,350
Forfeited (shares)   (347,512)
Vested (shares)   (187,218)
Outstanding at end of period (shares)   702,559
Grant Date Fair Value    
Outstanding at beginning of period (USD per share)   $ 9.88
Granted (USD per share)   6.67
Forfeited (USD per share)   9.44
Vested (USD per share)   7.98
Outstanding at end of period (USD per share)   $ 8.21
Market Based Performance Restricted Stock Units    
Restricted Stock and Restricted Stock Units    
Outstanding at beginning of period (shares)   0
Granted (shares) 432,973 432,973
Forfeited (shares)   (46,649)
Vested (shares)   (98,318)
Outstanding at end of period (shares)   288,006
Grant Date Fair Value    
Outstanding at beginning of period (USD per share)   $ 0.00
Granted (USD per share) $ 8.99 8.99
Forfeited (USD per share)   8.99
Vested (USD per share)   8.99
Outstanding at end of period (USD per share)   $ 8.99
Cash-Settled Restricted Stock Units    
Restricted Stock and Restricted Stock Units    
Outstanding at beginning of period (shares)   0
Granted (shares)   98,743
Forfeited (shares)   0
Vested (shares)   (12,190)
Outstanding at end of period (shares)   86,553
Grant Date Fair Value    
Outstanding at beginning of period (USD per share)   $ 0.00
Granted (USD per share)   6.62
Forfeited (USD per share)   0.00
Vested (USD per share)   6.60
Outstanding at end of period (USD per share)   $ 6.63