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Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Voting and Nonvoting Common Stock
Accumulated Other Comprehensive Loss
Retained Earnings
Balance at Dec. 31, 2012 $ 61,350 $ 41,508 $ 1,818 $ 18,024
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 4,593      
Other comprehensive income (loss) (4,190)   (4,190)  
Cash dividends declared (715)     (715)
Recognition of the fair value of share-based compensation 514 514    
Issuance of common stock warrants 255 255    
Net cash proceeds from common stock issuance 29,101 29,101    
Balance at Dec. 31, 2013 90,908 71,378 (2,372) 21,902
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 4,324      
Other comprehensive income (loss) 2,237   2,237  
Cash dividends declared (1,080)     (1,080)
Recognition of the fair value of share-based compensation 507 507    
Common stock redeemed for the net settlement of share-based awards (71) (71)    
Other (40) (40)    
Balance at Dec. 31, 2014 96,785 71,774 (135) 25,146
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 8,929      
Other comprehensive income (loss) (1,074)   (1,074)  
Cash dividends declared (1,095)     (1,095)
Recognition of the fair value of share-based compensation 762 762    
Deferred stock rights and restricted stock units issued in lieu of cash dividends payable on outstanding deferred stock rights and restricted stock units 25 25    
Excess tax benefit on share-based compensation 36 36    
Common stock redeemed for the net settlement of share-based awards (38) (38)    
Balance at Dec. 31, 2015 $ 104,330 $ 72,559 $ (1,209) $ 32,980