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Loans (Composition Of Loans Acquired At Acquisition) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Virginia Savings Bank And Community Financial [Member]
Dec. 31, 2012
Virginia Savings Bank And Community Financial [Member]
Mar. 31, 2013
Community Bank [Member]
Jan. 10, 2013
Community Bank [Member]
Mar. 31, 2013
Virginia Savings Bank [Member]
Dec. 31, 2012
Virginia Savings Bank [Member]
May 31, 2012
Virginia Savings Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Gross loans $ 2,497,023 $ 2,146,369 $ 408,342 $ 65,219 $ 347,330   $ 61,012 $ 65,219  
Credit-impaired loans, Carrying value     48,086 7,018 42,200   5,886 7,018  
Credit-impaired loans, Contractual principal and interest $ 83,154   $ 83,154 $ 10,759 $ 74,365 $ 77,770 $ 8,789 $ 10,759 $ 11,567