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Employee Retirement Benefits
9 Months Ended
Oct. 31, 2012
Employee Retirement Benefits [Abstract]  
Employee Retirement Benefits
EMPLOYEE RETIREMENT BENEFITS

The Company provides postretirement medical and other benefits to senior executive officers and senior managers. There are no plan assets for the plans and any obligations are covered through operating cash and investments. The components of net periodic benefit cost for postretirement benefits are as follows:
 
Three Months Ended
 
Nine Months Ended
 
October 31,
2012
 
October 31,
2011
 
October 31,
2012
 
October 31,
2011
Service cost
$
46

 
$
30

 
$
140

 
$
90

Interest cost
84

 
83

 
252

 
251

Amortization of actuarial losses
59

 
32

 
175

 
95

Net periodic benefit cost
$
189

 
$
145

 
$
567

 
$
436