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Loans (Composition Of Loans Acquired At Acquisition) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2013
Virginia Savings Bank [Member]
Dec. 31, 2012
Virginia Savings Bank [Member]
May 31, 2012
Virginia Savings Bank [Member]
Sep. 30, 2013
Community Bank [Member]
Jan. 10, 2013
Community Bank [Member]
Dec. 31, 2012
Community Bank [Member]
Sep. 30, 2013
Virginia Savings Bank And Community Financial [Member]
Jan. 10, 2013
Virginia Savings Bank And Community Financial [Member]
Dec. 31, 2012
Virginia Savings Bank And Community Financial [Member]
Financing Receivable, Impaired [Line Items]                      
Outstanding loan balance $ 2,558,456 $ 2,146,369 $ 52,640 $ 65,219 $ 82,000 $ 288,117 $ 410,000 $ 0 $ 340,757   $ 65,219
Credit-impaired loans:                      
Carrying value     4,248 7,018   24,958   0 29,206   7,018
Contractual principal and interest     $ 5,253 $ 10,759 $ 11,567 $ 40,896 $ 58,014 $ 0 $ 46,149 $ 69,581 $ 10,759