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Loans and Allowance for Loan Losses Narrative (Details) (Real estate [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Real estate [Member]
Loans Receivable [Line Items]
Loans pledged as collateral	$ 345,000	$ 337,000

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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