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Commitments and contingencies (Tables)
12 Months Ended
Dec. 31, 2013
Commitments and contingencies [Abstract]  
Summary of outstanding off-balance sheet financial instruments

At December 31, 2013 and 2012, the Company had outstanding the following approximate off-balance-sheet financial instruments whose contract amounts represent credit risk:

 

  Contract  Contract 
  Amount  Amount 
  2013  2012 
       
Undisbursed credit lines $37,474,000  $35,780,000 
Commitments to extend or originate credit  10,581,000   25,016,000 
Standby letter of credit  2,192,000   3,314,000 
         
Total commitments to extend credit $50,247,000  $64,110,000