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Mortgage Banking Activities (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Capitalized mortgage servicing rights    
Beginning balance $ 6,375 $ 6,400
Originations 1,167 1,036
Amortized to expense (1,282) (1,002)
Balance, end of period 6,220 6,464
Less valuation allowance (1,344) (58)
Net balance $ 4,916 $ 6,376