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Acquisitions (Acquired Loans At Acquisition) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Virginia Savings Bank [Member]
Dec. 31, 2012
Virginia Savings Bank [Member]
May 31, 2012
Virginia Savings Bank [Member]
Jan. 10, 2013
Community Bank [Member]
Dec. 31, 2013
Virginia Savings Bank and Community Bank as of acquisition date [Member]
Dec. 31, 2013
Virginia Savings Bank and Community Bank [Member]
Dec. 31, 2012
Virginia Savings Bank and Community Bank [Member]
Business Acquisition [Line Items]              
Contractually required principal and interest $ 3,932 $ 10,759 $ 11,567 $ 55,983 $ 67,550 $ 42,498 $ 10,759
Contractual cash flows not expected to be collected (non-accretable difference)     (3,973) (19,758) (23,731)    
Expected cash flows     7,594 36,225 43,819    
Interest component of expected cash flows (accretable difference)     (954) (5,469) (6,423)    
Estimated fair value of purchased credit impaired loans acquired     6,640 30,756 37,396    
Carry Value of Loans at Acquisition Date     72,476 356,822 429,298    
Fair Value Adjustment for NonCredit Impaired Loans     (5,653) (15,409) (21,062)    
Fair Value of NonCredit Impaired Loans     $ 66,823 $ 341,413 $ 408,236