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Defined Benefit Plan
9 Months Ended
Sep. 30, 2012
Defined Benefit Plan [Abstract]  
Defined Benefit Plan
Note 7: Defined Benefit Plan
 
Components of Net Periodic Benefit Cost

   
Pension Benefits
 
   
Nine Months Ended September 30,
 
   
2012
  
2011
 
Service cost
 $351  $327 
Interest cost
  555   528 
Expected return on plan assets
  (807)  (609)
Amortization of prior service cost
  (75)  (75)
Recognized net actuarial loss
  381   219 
Net Periodic Benefit Cost
 $405  $390 

2012 Plan Year Employer Contribution

Without considering the prefunding balance, NBI's minimum required contribution to the National Bankshares, Inc. Retirement Income Plan (the "Plan") is $733. Considering the prefunding balance, the 2012 minimum required contribution is $0. The Company elected to contribute $549 to the Plan during the nine months ended September 30, 2012.