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Income taxes
 12 Months Ended
Dec. 31, 2011
Income taxes [Abstract]  
Income taxes
14.  Income taxes:

The current and deferred amounts of the provision (benefit) for income taxes expense for each of the years in the three-year period ended December 31, 2011, are as follows:

Year Ended December 31
 
2011
  
2010
  
2009
 
Current
 $2,540  $1,625  $(591)
Deferred
  (183)  (188)  1,514 
   $2,357  $1,437  $923 

The components of the net deferred tax asset at December 31, 2011 and 2010 are as follows:

Year Ended December 31
 
2011
  
2010
 
Deferred tax asset:
      
Allowance for loan losses
 $1,464  $1,018 
Deferred loan fees
  2   2 
Deferred compensation
  344   345 
Other-than-temporary impairment on securities
  425   449 
Alternative minimum tax
  387   387 
Impairment charge on other real estate owned
      195 
Unrealized loss on investment securities available-for-sale
      430 
Other
  90   43 
Total
  2,712   2,869 
Deferred tax liabilities:
        
Depreciation
  447   399 
Interest on preferred equity securities
  16   16 
Prepaid expenses
  121   88 
Deferred loan costs
  274   265 
Unrealized gains on investment securities available-for-sale
  1,878     
Total
  2,736   768 
Net Deferred Tax Asset (Liability)
 $(24) $2,101 

Management believes that future taxable income will be sufficient to utilize deferred tax assets.  Core earnings of the Company have remained strong and will continue to support the recognition of the deferred tax asset based on future growth projections.

A reconciliation between the amount of the effective income tax expense and the income tax expense that would have been provided at the federal statutory rate of 34.0 percent for each of the years ended December 31, 2011, 2010 and 2009, is summarized as follows:

Year Ended December 31
 
2011
  
2010
  
2009
 
Federal income tax at statutory rate
 $3,459  $2,693  $2,030 
Tax exempt interest, net
  (975)  (1,001)  (957)
Officers' life insurance income
  (129)  (217)  (115)
Other, net
  2   (38)  (35)
Total
 $2,357  $1,437  $923