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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]
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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 |  |

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