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Real Estate Acquired in Settlement of Loans (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Jun. 30, 2012
Summary of activity in valuation allowance for other real estate owned in settlement of loans          
Balance, beginning of period   $ 6,537 $ 6,977 $ 6,158 $ 7,474
Provision for other real estate owned 1,081 220 1,821 661  
Charge-offs (1,075) (127) (1,318) (189)  
Balance, end of period $ 7,480 $ 6,630 $ 7,480 $ 6,630 $ 7,474