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Retirement Plans
 3 Months Ended
Jul. 31, 2020
Retirement Plans [Abstract]  
Retirement Plans
Note 14 — Retirement Plans

The components of net pension income for the defined benefit plans were as follows:

  
Three Months Ended
July 31,
  
   
2020
    
2019
  
Service cost
  
$
333
    
$
224
  
Interest cost
    
4,521
      
5,834
  
Expected return on plan assets
    
(9,378
)
    
(10,059
)
Amortization of prior service cost
    
(25
)
    
(19
)
Amortization of net actuarial loss
    
1,987
      
1,600
  
Net pension income
  
$
(2,562
)
  
$
(2,420
)

The service cost component of net pension income is reflected in Operating and Administrative Expenses on our Unaudited Condensed Consolidated Statements of Income. The other components of net benefit costs are reported separately from the service cost component and below Operating Income. Such amounts are reflected in Interest and Other Income on our Unaudited Condensed Consolidated Statements of Income.

Employer defined benefit pension plan contributions were $5.1 million and $4.7 million for the three months ended July 31, 2020 and 2019, respectively.


Defined Contribution Savings Plans

The expense for employer defined contribution savings plans was $6.6 million and $4.3 million for the three months ended July 31, 2020 and 2019, respectively.