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Fair value estimates (Tables)
6 Months Ended
Jun. 30, 2012
Fair value estimates [Abstract]  
Assets and liabilities at fair value or a recurring and nonrecurring basis
Assets and liabilities at fair value or a recurring and nonrecurring basis at June 30, 2012 and December 31, 2011, are summarized as follows:

   
Fair Value Measurement Using
June 30, 2012
 
Amount
  
Quoted Prices in Active Markets for Identical Assets
(Level 1)
  
Significant Other Observable Inputs
(Level 2)
  
Significant Unobservable Inputs
(Level 3)
Recurring fair value measurements
           
Investment securities available-for-sale
           
U.S. Government-sponsored enterprises
 $33,015     $33,015   
State and municipals:
             
Taxable
  18,482      18,482   
Tax-exempt
  35,497      35,497   
Corporate debt securities
  3,491      3,491   
Mortgage-backed securities:
             
U.S. Government agencies
  15,447      15,447   
U.S. Government-sponsored enterprises
  22,194      22,194   
Equity securities:
             
Preferred
             
Common
  470  $470       
Total investment securities available-for-sale
 $128,596  $470  $128,126   
Total recurring fair value measurements
 $128,596  $470  $128,126   
                
Nonrecurring fair value measurements
              
Impaired loans
 $6,491         
6,491
Total nonrecurring fair value measurements
 $6,491         
6,491
 
   
Fair Value Measurement Using
December 31, 2011
 
Amount
  
Quoted Prices in
Active Markets for Identical Assets
(Level 1)
  
Significant Other Observable Inputs
(Level 2)
  
Significant Unobservable
Inputs
(Level 3)
Recurring fair value measurements
           
Investment securities available-for-sale
           
U.S. Government-sponsored enterprises
 $32,776     $32,776   
State and municipals:
             
Taxable
  19,728      19,728   
Tax-exempt
  39,686      39,686   
Corporate debt securities
  3,850      3,850   
Mortgage-backed securities:
             
U.S. Government agencies
  16,912      16,912   
U.S. Government-sponsored enterprises
  26,263      26,263   
Equity securities:
             
Preferred
  117      117   
Common
  567  $567       
Total investment securities available-for-sale
 $139,899  $567  $139,332   
Total recurring fair value measurements
 $139,899  $567  $139,332   
                
Nonrecurring fair value measurements
              
Impaired loans
 $7,341         
7,341
Total nonrecurring fair value measurements
 $7,341         
7,341
Additional quantitative information about assets measured at fair value on a nonrecurring basis
The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value:

   
Quantitative Information about Level 3 Fair Value Measurements
June 30, 2012
 
Fair Value Estimate
 
Valuation
Techniques
Unobservable
Input
Range
(Weighted Average)
Impaired loans
 $6,491 
Appraisal of collateral (1)
Appraisal adjustments (2)
20.0% to 25.0% (24.6%)
       
Liquidation expenses (2)
6.0% to 10.0% (8.8%)
Carrying and fair values of the financial instruments
      
Fair Value Hierarchy
 
June 30, 2012
 
Carrying Value
  
Fair Value
  
Quoted Prices
in Active
Markets for Identical Assets
(Level 1)
  
Significant
Other
Observable
Inputs
(Level 2)
  
Significant Unobservable Inputs
(Level 3)
 
Financial assets:
               
Cash and cash equivalents
 $22,389  $22,389  $22,389       
Investment securities available-for-sale
  128,596   128,596   470  $128,126    
Loans held for sale
  2,242   2,287   2,287        
Net loans
  451,138   465,905          $465,905 
Accrued interest receivable
  2,903   2,903   2,903         
Restricted equity securities
 $2,507  $2,507  $2,507         
                      
Financial liabilities:
                    
Deposits
 $538,111  $542,024  $454,426      $87,598 
Short-term borrowings
  13,233   13,233   13,233         
Long-term debt
  18,533   18,781      $18,781     
Accrued interest payable
 $248  $248  $248         
                      
The carrying and fair value of the Company's financial instruments at December 31, 2011 are as follows:

December 31, 2011
 
Carrying Value
  
Fair Value
 
Financial assets:
      
Cash and cash equivalents
 $10,559  $10,559 
Investment securities available-for-sale
  139,899   139,899 
Loans held for sale
  569   569 
Net loans
  439,754   447,717 
Accrued interest receivable
  3,448   3,448 
Restricted equity securities
 $2,374  $2,374 
          
Financial liabilities:
        
Deposits
 $494,283  $497,680 
Short-term borrowings
  43,791   43,791 
Long-term debt
  18,927   19,300 
Accrued interest payable
 $284  $284