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Defined Benefit Pension Plans (Tables)
3 Months Ended
Jul. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Pension Expenses

Pension expense consisted of the following (in thousands):

 

     Three months ended
July 31, 2015
     Three months ended
July 31, 2014
 

Service cost

   $ -0-       $ -0-   

Interest cost

     230         222   

Expected return on plan assets

     (344      (325

Recognition of net loss

     294         234   
  

 

 

    

 

 

 

Net periodic pension expense

   $ 180       $ 131