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Retirement Plans
 9 Months Ended
Jan. 31, 2021
Retirement Plans [Abstract]  
Retirement Plans
Note 14 — Retirement Plans

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

  
Three Months Ended
January 31,
    
Nine Months Ended
January 31,
  
   
2021
    
2020
    
2021
    
2020
  
Service cost
  
$
356
    
$
283
    
$
1,036
    
$
1,600
  
Interest cost
    
4,564
      
5,919
      
13,695
      
18,103
  
Expected return on plan assets
    
(9,853
)
    
(10,217
)
    
(28,880
)
    
(30,162
)
Amortization of prior service cost
    
(23
)
    
(18
)
    
(72
)
    
(56
)
Amortization of net actuarial loss
    
1,944
      
1,623
      
5,964
      
4,804
  
Net pension income
  
$
(3,012
)
  
$
(2,410
)
  
$
(8,257
)
  
$
(5,711
)

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 pension income are reported separately from the service cost component and below Operating Income. Such amounts are reflected in Other Income on our Unaudited Condensed Consolidated Statements of Income.

Employer defined benefit pension plan contributions were $3.6 million and $12.5 million for the three and nine months ended January 31, 2021, respectively, and $3.8 million and $11.8 million for the three and nine months ended January 31, 2020, respectively.

Defined Contribution Savings Plans

The expense for employer defined contribution savings plans was approximately $5.6 million and $17.4 million for the three and nine months ended January 31, 2021, respectively, and $3.2 million and $10.6 million for the three and nine months ended January 31, 2020, respectively.