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Stock-Based Compensation - Restricted and Performance Unit Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Allocated share-based compensation expense $ 22 $ 235
Tax benefit from compensation expense $ 9 100
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) 107,049  
Granted (in shares) 0  
Vested (in shares) (34,086)  
Forfeited (in shares) (2,163)  
Outstanding - end of period (in shares) 70,800  
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) $ 13.72  
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) 0.00  
Vested, Weighted-Average Grant Date Fair Value (in dollars per share) 11.12  
Forfeited, Weighted-Average Grant Date Fair Value (in dollars per share) 10.42  
Outstanding - end of period, Weighted-Average Grant Date Fair Value (in dollars per share) $ 15.07  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Total compensation cost not yet recognized $ 900  
Total compensation cost not yet recognized, period for recognition 3 years 24 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 $ 492 $ 600
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 $ 300  
Total compensation cost not yet recognized, period for recognition 3 years 23 days