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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2015
Nov. 30, 2014
Nov. 30, 2013
May. 31, 2011
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Approved and authorized maximum number of shares to be issued       3,000,000      
Compensation expense related to stock based awards outstanding         $ 2,300 $ 1,600 $ 2,100
Granted (in shares)         143,862 233,828 35,081
Proceeds received upon exercise of stock options         $ 28 $ 869 $ 858
Exercise of stock options, shares         3,970 143,282 155,731
Total share-based compensation cost not yet recognized         $ 2,300    
Share-based compensation cost not yet recognized, period for recognition         2 years    
Total intrinsic value of options exercised         $ 17 $ 494 $ 804
Total fair value of shares vested         $ 1,226 $ 923 $ 1,457
Stock options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options, expiration period       10 years      
Forfeiture rate applied to options         5.50%    
Stock options | Director              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Grants awarded during period   6,167 6,206        
Weighted average grant-date fair value of options granted     $ 11.29        
Stock options | Officers and Executives              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options, vesting period   3 years       3 years  
Grants awarded during period   84,891          
Weighted average grant-date fair value of options granted   $ 11.35       $ 11.35  
Granted (in shares)         0 233,828 0
Stock options | Directors, Officers and Executives              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Grants awarded during period         0    
Stock options | Chief Operating Officer              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Grants awarded during period 38,660            
Weighted average grant-date fair value of options granted $ 5.82            
Granted (in shares) 143,862            
Stock options | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options, vesting period       3 years      
Stock options | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options, vesting period       5 years