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Loan Servicing (Tables)
12 Months Ended
Dec. 31, 2012
Loan Servicing [Abstract]  
Originated mortgage servicing rights
                         
    December 31
2012
    December 31
2011
    December 31
2010
 

Mortgage servicing rights

                       

Balances, January 1

  $ 5,049     $ 4,175     $ 3,010  

Servicing rights capitalized

    2,439       1,866       2,000  

Amortization of servicing rights

    (1,319     (992     (835
   

 

 

   

 

 

   

 

 

 

Balances, December 31

    6,169       5,049       4,175  
   

 

 

   

 

 

   

 

 

 

Impairment allowance

                       

Balances, January 1

    (856     (803     (139

Additions

    (762     (792     (776

Reductions

    594       739       112  
   

 

 

   

 

 

   

 

 

 

Balances, December 31

    (1,024     (856     (803
   

 

 

   

 

 

   

 

 

 

Mortgage servicing rights, net

  $ 5,145     $ 4,193     $ 3,372