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

 
Six Months Ended
 
Three Months Ended
 
 
July 31,
 
July 31,
 
 
2012
 
2011
   
2012
 
2011
 
Service cost
$112,070
 
$102,842
   
$56,035
 
$51,442
 
Interest cost
544,436
 
560,764
   
272,218
 
280,364
 
Expected return on plan assets
(609,644
)
(700,981
)
 
(304,822
)
(350,481
)
Recognized net actuarial loss
219,982
 
104,943
   
109,991
 
52,443
 
Net periodic benefit cost
$266,844
 
$67,568
   
$133,422
 
$33,768