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Consolidated Statements of Shareholders' Equity (USD $)
In Thousands, except Share data
Preferred Stock
Preferred Stock Discount
Common Stock
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Total
Beginning balance at Dec. 31, 2008       $ 96,072 $ 131,952 $ (8,156) $ 219,868
Beginning balance, shares at Dec. 31, 2008     16,574      
Net income       60,259   60,259
Common stock warrants issued     4,592     4,592
Common stock issued under stock option plans     393     393
Common stock issued under stock option plans, shares     42      
Common stock issued into dividend reinvestment plan     1,112     1,112
Common stock issued into dividend reinvestment plan, shares     77      
Cash dividends declared       (5,331)   (5,331)
Preferred dividends       (3,169)   (3,169)
Accretion of preferred stock discount   803   (803)   803
Tax benefit realized from exercise of nonqualified stock options     73     73
Stock-based compensation     449     449
Stock-based compensation, shares     29      
Other comprehensive income         3,729 3,729
Ending balance at Dec. 31, 2009 65,000 (3,789) 102,691 182,908 (4,427) 342,383
Ending balance, shares at Dec. 31, 2009     16,722      
Preferred stock issued at Dec. 31, 2009 65,000 (4,592)       60,408
Net income       9,982   9,982
Common stock issued under stock option plans     171     171
Common stock issued under stock option plans, shares     17      
Common stock issued into dividend reinvestment plan     669     669
Common stock issued into dividend reinvestment plan, shares     46      
Cash dividends declared       (5,370)   (5,370)
Preferred dividends       (3,250)   (3,250)
Accretion of preferred stock discount   857   (857)   857
Tax benefit realized from exercise of nonqualified stock options     36     36
Stock-based compensation     640     640
Stock-based compensation, shares     16      
Other comprehensive income         (658) (658)
Ending balance at Dec. 31, 2010 65,000 (2,932) 104,207 183,413 (5,085) 344,603
Ending balance, shares at Dec. 31, 2010     16,801     16,801,426
Net income       13,642   13,642
Preferred stock redeemed (65,000)         (65,000)
Common stock issued under stock option plans     30     30
Common stock issued under stock option plans, shares     2      
Common stock issued into dividend reinvestment plan     851     851
Common stock issued into dividend reinvestment plan, shares     71      
Repurchases of common stock     (228)     (228)
Repurchases of common stock, shares     (20)      
Repurchase of outstanding common stock warrants     (924)     (924)
Cash dividends declared       (5,398)   (5,398)
Preferred dividends       (3,234)   (3,234)
Accretion of preferred stock discount   2,932   (2,932)   2,932
Stock-based compensation     905     905
Stock-based compensation, shares     56      
Other comprehensive income         (3,597) (3,597)
Ending balance at Dec. 31, 2011 $ 63,500    $ 104,841 $ 185,491 $ (8,682) $ 345,150
Ending balance, shares at Dec. 31, 2011     16,910     16,909,820
Preferred stock issued at Dec. 31, 2011 63,500         63,500