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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Retained Earnings
Accumulated Other Comprehensive Income (Loss), Net of Taxes
Balance (in shares) at Dec. 31, 2014   5,939,482    
Balance at Dec. 31, 2014 $ 200,026 $ 82,436 $ 116,502 $ 1,088
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 18,441   18,441  
Other comprehensive income (loss) (895)     (895)
Stock options exercised (in shares)   37,071    
Stock options exercised 1,139 $ 1,139    
Excess tax benefit - stock-based compensation 212 $ 212    
Stock issued under employee stock purchase plan (in shares)   339    
Stock issued under employee stock purchase plan 17 $ 17    
Restricted stock granted (in shares)   15,970    
Restricted stock granted 0 $ 0    
Restricted stock forfeited/cancelled (in shares)   (450)    
Restricted stock forfeited/cancelled 0 $ 0    
Stock-based compensation - stock options 252 252    
Stock-based compensation - restricted stock 384 $ 384    
Cash dividends paid on common stock (5,390)   (5,390)  
Stock purchased by directors under director stock plan (in shares)   245    
Stock purchased by directors under director stock plan 12 $ 12    
Stock issued in payment of director fees (in shares)   5,295    
Stock issued in payment of director fees 275 $ 275    
Stock issued from exercise of warrants (in shares)   70,591    
Stock issued from exercise of warrants $ 0 $ 0    
Balance (in shares) at Dec. 31, 2015 6,068,543 6,068,543    
Balance at Dec. 31, 2015 $ 214,473 $ 84,727 129,553 193
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Net income 17,447   17,447  
Other comprehensive income (loss) 2,234     2,234
Stock options exercised (in shares)   32,117    
Stock options exercised 1,087 $ 1,087    
Excess tax benefit - stock-based compensation 119 $ 119    
Stock issued under employee stock purchase plan (in shares)   488    
Stock issued under employee stock purchase plan 23 $ 23    
Restricted stock granted (in shares)   16,910    
Restricted stock granted 0 $ 0    
Stock-based compensation - stock options 266 266    
Stock-based compensation - restricted stock 444 $ 444    
Cash dividends paid on common stock (4,573)   (4,573)  
Stock purchased by directors under director stock plan (in shares)   516    
Stock purchased by directors under director stock plan 26 $ 26    
Stock issued in payment of director fees (in shares)   4,607    
Stock issued in payment of director fees $ 234 $ 234    
Balance (in shares) at Sep. 30, 2016 6,123,181 6,123,181    
Balance at Sep. 30, 2016 $ 231,780 $ 86,926 $ 142,427 $ 2,427