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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $)
Total
Series A Preferred Stock [Member]
Series B Preferred Stock
Series C Preferred Stock [Member]
Common Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2009 $ 91,223,000 $ 6,819,000 $ 1,317,000 $ 0 $ 37,611,000 $ 46,931,000 $ (1,455,000)
Balance (shares) at Dec. 31, 2009   7,000 1,359 0 8,949,754    
Net income 3,279,000         3,279,000  
Net change in unrealized gain on available-for-sale investment securities 2,422,000           2,422,000
Conversion of preferred stock Series B, non-voting 0   (1,317,000)   1,317,000    
Conversion of preferred stock Series B, non-voting, shares     (1,359)   258,862    
Stock-based compensation expense 239,000       239,000    
Stock options exercised and related tax benefit 578,000       578,000    
Stock options exercised and related tax benefit, shares         159,400    
Preferred stock dividends and accretion (350,000) 45,000       (395,000)  
Balance at Dec. 31, 2010 97,391,000 6,864,000 0 0 39,745,000 49,815,000 967,000
Balance (shares) at Dec. 31, 2010   7,000 0 0 9,368,016    
Net income 6,477,000         6,477,000  
Net change in unrealized gain on available-for-sale investment securities 3,157,000           3,157,000
Issuance of preferred stock Series C 7,000,000     7,000,000      
Issuance of preferred stock Series C, shares       7,000      
Redemption of preferred stock Series A (7,000,000) (7,000,000)          
Redemption of preferred stock Series A, shares   (7,000)          
Repurchase and retirement of common stock warrants (185,000)       (185,000)    
Stock-based compensation expense 196,000       196,000    
Stock options exercised and related tax benefit 796,000       796,000    
Stock options exercised and related tax benefit, shares         179,800    
Preferred stock dividends and accretion (350,000) 136,000       (486,000)  
Balance at Dec. 31, 2011 107,482,000 0 0 7,000,000 40,552,000 55,806,000 4,124,000
Balance (shares) at Dec. 31, 2011   0 0 7,000 9,547,816    
Net income 7,520,000         7,520,000  
Net change in unrealized gain on available-for-sale investment securities 3,462,000           3,462,000
Stock-based compensation expense 108,000       108,000    
Cash dividend payment (480,000)         (480,000)  
Repurchase and retirement of common stock (488,000)       (488,000)    
Repurchase and retirement of common stock, shares (58,100)       (58,100)    
Stock options exercised and related tax benefit 411,000       411,000    
Stock options exercised and related tax benefit, shares 69,030       69,030    
Preferred stock dividends (350,000)         (350,000)  
Balance at Dec. 31, 2012 $ 117,665,000 $ 0 $ 0 $ 7,000,000 $ 40,583,000 $ 62,496,000 $ 7,586,000
Balance (shares) at Dec. 31, 2012   0 0 7,000 9,558,746