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Earnings Per Share - Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Diluted Earnings Per share        
Net income available to common shareholders $ 3,078 $ 2,693 $ 5,544 $ 5,309
Weighted average shares outstanding (in shares) 10,924,437 10,918,065 10,924,015 10,917,010
Effect of dilutive stock options (in shares) 85,479 81,598 82,036 79,562
Weighted average shares of common stock and common stock equivalents (in shares) 11,009,916 10,999,663 11,006,051 10,996,572
Diluted earnings per share (in dollars per share) $ 0.28 $ 0.24 $ 0.50 $ 0.48
Anti-dilutive options and warrants (in shares) 113,735   145,523 122,640