Acquisitions (Acquired Loans At Acquisition) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2013 Virginia Savings Bank [Member]	Dec. 31, 2012 Virginia Savings Bank [Member]	May 31, 2012 Virginia Savings Bank [Member]	Mar. 31, 2013 Community Bank [Member]	Jan. 10, 2013 Community Bank [Member]
Business Acquisition [Line Items]
Contractually required principal and interest	$ 83,154	$ 8,789	$ 10,759	$ 11,567	$ 74,365	$ 77,770
Contractual cash flows not expected to be collected (non-accretable difference)	27,001	1,502		(3,973)	25,499	(25,499)
Expected cash flows	56,153	7,287		7,594	48,866	52,271
Interest component of expected cash flows (accretable difference)				(954)		(6,721)
Estimated fair value of purchased credit impaired loans acquired				6,640		45,550
Estimated fair value of loans acquired	$ 442,534			$ 73,463		$ 369,071

The price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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The investor's estimate, at acquisition, of the amount and timing of undiscounted principal, interest, and other cash flows expected to be collected. This would be the investor's best estimate of cash flows, including the effect of prepayments if considered, that is used in determining the acquisition price, and, in a business combination, the investor's estimate of fair value for purposes of acquisition price allocation. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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- Definition

The total undiscounted amount of all uncollected contractual principal and contractual interest payments both past due and scheduled for the future, adjusted for the timing of prepayments, if considered, less any reduction by the investor at the acquisition date. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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