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Retirement Plans
6 Months Ended
Oct. 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
October 31,
   
Six Months Ended
October 31,
 
   
2020
   
2019
   
2020
   
2019
 
Service cost
 
$
347
   
$
1,093
   
$
680
   
$
1,317
 
Interest cost
   
4,610
     
6,350
     
9,131
     
12,184
 
Expected return on plan assets
   
(9,649
)
   
(9,886
)
   
(19,027
)
   
(19,945
)
Amortization of prior service cost
   
(24
)
   
(19
)
   
(49
)
   
(38
)
Amortization of net actuarial loss
   
2,033
     
1,581
     
4,020
     
3,181
 
Net pension income
 
$
(2,683
)
 
$
(881
)
 
$
(5,245
)
 
$
(3,301
)

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 $3.8 million and $8.9 million for the three and six months ended October 31, 2020, respectively, and $3.3 million and $8.0 million for the three and six months ended October 31, 2019, respectively.

Defined Contribution Savings Plans

The expense for employer defined contribution savings plans was approximately $5.2 million and $11.8 million for the three and six months ended October 31, 2020, respectively, and $3.1 million and $7.4 million for the three and six months ended October 31, 2019, respectively.