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Stock-Based Compensation (Stock Options Narrative) (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jun. 16, 2009
shares
Apr. 30, 2015
Option
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
Dec. 31, 2013
USD ($)
$ / shares
Dec. 31, 1998
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options granted | Option   1        
Options granted in period (in shares)     50,000      
Options granted in period, weighted average exercise price (in dollars per share) | $ / shares     $ 22.90      
Weighted average grant date fair value of options granted (in dollars per share) | $ / shares     $ 10.33 $ 16.56 $ 10.30  
Total intrinsic value of options exercised | $     $ 481 $ 48 $ 458  
Proceeds from exercise of stock options | $     776 59 829  
Unrecognized compensation cost related to stock options | $     722      
Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense | $     $ 601 $ 426 $ 198  
Unrecognized compensation cost related to stock options, weighted average period for recognition     3 years      
Stock Options | 1998 Stock Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     3 years      
Award expiration period     10 years      
Stock Options | Common Stock | 1998 Stock Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized 750,000         550,000
Additional shares authorized 200,000          
Number of shares available for grant     93,419      
Non-Executive Employees            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period   3 years        
Options granted in period (in shares)   50,000        
Options granted in period, weighted average exercise price (in dollars per share) | $ / shares   $ 22.90