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Mortgage Servicing Rights (Tables)
9 Months Ended
Sep. 30, 2012
Mortgage Servicing Rights [Abstract]  
Data and key economic assumptions related to the Company's mortgage servicing rights
         

Unpaid principal balance

  $  223,584  
   

Weighted-average prepayment speed (CPR)

    7.86 % 

Estimated impact of a 10% increase

  $ (76 ) 

Estimated impact of a 20% increase

    (147 ) 
   

Discount rate

    11.53 % 

Estimated impact of a 10% increase

  $ (57 ) 

Estimated impact of a 20% increase

    (110 ) 
   

Weighted-average coupon interest rate

    3.39 % 

Weighted-average servicing fee (basis points)

    25.1  

Weighted-average remaining maturity (in months)

    265.9  
Changes in the Company's mortgage servicing rights
         

Carrying value at January 1, 2012

  $ 195  

Capitalization

    2,380  

Amortization

    (68 ) 
   

 

 

 

Carrying value at September 30, 2012

  $ 2,507