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Off-balance sheet financial instruments (Tables)
12 Months Ended
Dec. 31, 2013
Guarantees [Abstract]  
Summary of Contractual Amounts of Off-balance Sheet Commitments

The contractual amounts of off-balance sheet commitments at December 31, 2013 and 2012 are summarized as follows:

 

December 31

   2013      2012  

Commitments to extend credit

   $ 221,138       $ 128,540   

Unused portions of lines of credit

     52,257         46,377   

Standby letters of credit

     29,914         14,440   
  

 

 

    

 

 

 
   $ 303,309       $ 189,357