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Deferred Compensation and Retirement Plans (Tables) (Deferred Compensation Plan)
3 Months Ended
Jul. 31, 2013
Deferred Compensation Plan
 
Components Of Net Periodic Benefit Costs

The components of net periodic benefit costs are as follows:

 

     Three Months Ended
July  31,
 
     2013      2012  
     (in thousands)  

Amortization of actuarial loss

   $ 780       $ 594   

Interest cost

     676         756   
  

 

 

    

 

 

 

Net periodic benefit costs

   $ 1,456       $ 1,350