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Stock-Based Compensation - Restricted and Performance Unit Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Allocated share-based compensation expense $ 746 $ 22
Tax benefit from compensation expense $ 290 0
Retricted and performance unit activity    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding - beginning of period (in shares) 403,658  
Granted (in shares) 0  
Vested (in shares) (36,407)  
Forfeited (in shares) (3,372)  
Outstanding - end of period (in shares) 363,879  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Outstanding - beginning of period, Weighted-Average Grant Date Fair Value (in dollars per share) $ 16.17  
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) 0.00  
Vested, Weighted-Average Grant Date Fair Value (in dollars per share) 15.31  
Forfeited, Weighted-Average Grant Date Fair Value (in dollars per share) 14.75  
Outstanding - end of period, Weighted-Average Grant Date Fair Value (in dollars per share) $ 16.27  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Total compensation cost not yet recognized $ 4,600  
Total compensation cost not yet recognized, period for recognition 2 years 8 months 10 days  
Performance shares    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Equity instruments other than options, vested in period $ 735 $ 500
Employee Stock Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Total compensation cost not yet recognized $ 1,800  
Total compensation cost not yet recognized, period for recognition 3 years 2 months 10 days