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Mortgage Loans Held For Sale (Details) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Loans Receivable Held-for-sale, Net [Abstract]    
Mortgage loans held for sale $ 16,355,000 $ 11,500,000
Mortgage loans held for sale, contractual balance 16,100,000 11,400,000
Gain expected upon sale of mortgage loans $ 291,000 $ 182,000