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Contingencies and loan commitments (Tables)
 6 Months Ended
Jun. 30, 2012
Credit Exposure
Total credit exposure at June 30, 2012 related to these items is summarized below:

Loan Commitments:
  
Contract Amount
  
   
Approved loan commitments
   $ 416,000  
Unused portions of loans and credit lines
     15,881,000  
Total loan commitments
   $ 16,297,000