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Mortgage Servicing Rights (Tables)
9 Months Ended
Sep. 30, 2012
Mortgage Servicing Rights [Abstract]  
Fair value of mortgage servicing rights

The following tables summarize the activity in, and the main assumptions we used to determine the fair value of mortgage servicing rights for the periods indicated (in thousands):

 

                                 
    Three months ended September 30,     Nine months ended September 30,  
    2012     2011     2012     2011  

Mortgage servicing rights:

                               

Balance at beginning of period

  $ 4,757     $ 4,818     $ 4,603     $ 4,605  

Additions

    409       220       1,395       655  

Change in fair value

    (681     (800     (1,513     (1,022
   

 

 

   

 

 

   

 

 

   

 

 

 

Balance at end of period

  $ 4,485     $ 4,238     $ 4,485     $ 4,238  
   

 

 

   

 

 

   

 

 

   

 

 

 
         

Servicing, late and ancillary fees received

  $ 389     $ 375     $ 1,140     $ 1,106  

Balance of loans serviced at:

                               

Beginning of period

  $ 628,674     $ 584,113     $ 598,185     $ 573,300  

End of period

  $ 642,110     $ 582,011     $ 642,110     $ 582,011  

Weighted-average prepayment speed (CPR)

                    20.9     21.0

Discount rate

                    10.0     9.0