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Accounting Policies (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Basic earnings per share        
Net Income $ 4,850 $ 3,417 $ 14,373 $ 9,275
Less: Preferred stock dividends and accretion of discount 63 710 325 1,263
Net Income Available to Common Shareholders 4,787 2,707 14,048 8,012
Weighted average common shares outstanding 8,503,475 7,414,043 7,758,537 7,402,300
Basic Earnings Per Share $ 0.56 $ 0.37 $ 1.81 $ 1.08
Diluted earnings per share        
Net income available to common shareholders $ 4,787 $ 2,707 $ 14,048 $ 8,012
Weighted average common shares outstanding 8,503,475 7,414,043 7,758,537 7,402,300
Effect of dilutive securities:        
Warrants 269,432 163,325 231,038 167,668
Weighted average shares outstanding total 8,838,659 7,596,569 8,034,996 7,598,950
Diluted Earnings Per Share $ 0.54 $ 0.36 $ 1.75 $ 1.05
Restricted Stock [Member]
        
Effect of dilutive securities:        
Effect of dilutive securities 30,971 4,399 19,317 13,676
Stock Options [Member]
        
Effect of dilutive securities:        
Effect of dilutive securities 34,782 14,803 26,105 15,307