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Real Estate and Other Assets Acquired in Settlement of Loans (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Summary of activity in valuation allowance for other real estate owned in settlement of loans    
Balance, beginning of year $ 6,137 $ 6,977
Provision for other real estate owned 2,343 254
Charge-offs (136) (41)
Balance, end of year $ 8,344 $ 7,190