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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
May 18, 2016
May 04, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of maximum shares available for issuance     1,375,000    
Stock-based compensation expense     $ 5.2 $ 3.2 $ 0.9
Income tax benefit related to stock-based compensation     $ 2.1 1.2 0.3
Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Forfeiture rate of restricted stock units     6.00%    
Number of shares vested (in shares) 53,853 101,210 115,271    
Number of shares of common stock distributed to the holder of restricted stock units (in shares)     81,864    
Number of shares of common stock withheld to cover taxes owed on vested units (in shares)     33,407    
Unrecognized compensation expense     $ 4.7    
Weighted average period     2 years 10 months 15 days    
Restricted Stock Units | General and Administrative Expense          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense     $ 2.3 2.2 0.5
Restricted Stock Units, Liability Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares vested (in shares)     82,257    
Number of shares of common stock distributed to the holder of restricted stock units (in shares)     71,072    
Number of shares of common stock withheld to cover taxes owed on vested units (in shares)     11,185    
Unrecognized compensation expense     $ 2.0    
Weighted average period     1 year 10 months 15 days    
Other current liabilities related to restricted stock     $ 1.5    
Restricted Stock Units, Liability Awards | Other Current Liabilities          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Other current liabilities related to restricted stock       0.7  
Restricted Stock Units, Liability Awards | General and Administrative Expense          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense     $ 3.0 $ 1.0 $ 0.3
Non-Employee Director | Restricted Stock Units, Liability Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period     1 year    
Officer, Employee, and Employee of Affiliates | Restricted Stock Units | Service Years, Group One          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period     3 years    
Officer, Employee, and Employee of Affiliates | Restricted Stock Units | Service Years, Group Two          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period     4 years