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Retirement Plans (Tables)
3 Months Ended
Jul. 31, 2023
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The components of net pension expense (income) for our defined benefit plans were as follows:
Three Months Ended
July 31,
20232022
Service cost$134 $200 
Interest cost6,947 6,189 
Expected return on plan assets(7,491)(8,384)
Amortization of prior service cost(23)(23)
Amortization of net actuarial loss2,026 1,524 
Net pension expense (income)$1,593 $(494)