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Defined Benefit Pension Plans (Tables)
6 Months Ended
Oct. 31, 2013
Compensation And Retirement Disclosure [Abstract]  
Pension Expenses

Pension expense consisted of the following (in thousands):

 

     Three months ended
October 31, 2013
    Three months ended
October 31, 2012
 

Service cost

   $ -0-      $ -0-   

Interest cost

     217        226   

Expected return on plan assets

     (324     (305

Recognition of net loss

     288        276   
  

 

 

   

 

 

 

Net periodic pension expense

   $ 181      $ 197   
  

 

 

   

 

 

 

 

     Six months ended
October 31, 2013
    Six months ended
October 31, 2012
 

Service cost

   $ -0-      $ -0-   

Interest cost

     429        453   

Expected return on plan assets

     (641     (607

Recognition of net loss

     571        551   
  

 

 

   

 

 

 

Net periodic pension expense

   $ 359      $ 397