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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Basic earnings per share                    
Net income available to common shareholders                 $ 4,814 $ 1,664
Weighted-Average Shares, Basic                 4,862 4,862
Basic $ 0.31 $ 0.27 $ 0.21 $ 0.20 $ 0.06 $ 0.12 $ 0.16    $ 0.99 $ 0.34
Effect of dilutive securities                    
Stock options & restricted stock, Income                      
Stock options & restricted stock, Weighted- Average Shares                      
Diluted earnings per share                    
Net income available to common shareholders and assumed conversions                 $ 4,814 $ 1,664
Weighted-Average Shares, Diluted                 4,862 4,862
Diluted $ 0.31 $ 0.27 $ 0.21 $ 0.20 $ 0.06 $ 0.12 $ 0.16    $ 0.99 $ 0.34