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Share-Based Compensation - Textual (Details)
3 Months Ended
Mar. 31, 2017
USD ($)
plan
$ / shares
shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of plans | plan 3  
Share-based compensation expense $ 203,000 $ 52,000
Options exercised during period | shares 54,915  
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 18,000  
Weighted average period to recognize unrecognized share-based compensation cost 6 months  
Other than options vested $ 0 $ 0
Granted (in shares) | shares 0 0
Nonvested and expected to vest (in shares) | shares 82,146  
2005 Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting period 5 years  
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Tax benefit of stock option compensation expense $ 92,000 $ 12,000
Restricted Common Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to non-vested share-based compensation arrangements $ 896,000  
Granted (in shares) | shares 0 8,850
Granted (in dollars per share) | $ / shares $ 0.00 $ 11.30
Weighted average remaining period 3 years 6 months 2 days  
Intrinsic value $ 1,684,000  
Restricted Common Stock [Member] | Annual Vesting [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting percent 20.00%