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EMPLOYEE BENEFIT PLANS (Tables)
9 Months Ended
Oct. 31, 2012
EMPLOYEE BENEFIT PLANS [Abstract]  
Components of periodic pension (income) cost
The following table provides the components of net periodic pension (income) cost:

   
Nine Months Ended       
  
Three Months Ended       
   
October 31,              
  
October 31,              
   
2012   
  
2011   
  
2012   
  2011   
Service cost
 $168,105  $154,284  $56,035  $51,442 
Interest cost
  816,654   841,128   272,218   280,364 
Expected return on plan assets
  (914,466 )  (1,051,462 )  (304,822 )  (350,481 )
Recognized net actuarial loss
  329,973   157,386   109,991   52,443 
Net periodic benefit cost
 $400,266  $101,336  $133,422  $33,768