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Condensed Consolidated Statements Of Changes In Stockholders' Equity (Parenthetical) (USD $)
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Common dividends declared, per share $ 0.36 $ 0.32
Preferred dividends declared, per share $ 45.00 $ 45.00
Preferred stock converted to common stock, shares 134,550 69,000
Common stock options exercised, shares 789 5,223
Restricted stock awards shares 29,652 5,300
Purchase of treasury shares 335,192  
Acquisition of Peoples Bank of Virginia, shares   2,157,005
Treasury stock shares acquired cost per share $ 15.52