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Retirement Plans (Tables)
6 Months Ended
Oct. 31, 2022
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The components of net pension income for our defined benefit plans were as follows:
Three Months Ended
October 31,
Six Months Ended
October 31,
2022202120222021
Service cost$192 $300 $392 $607 
Interest cost5,994 5,178 12,183 10,401 
Expected return on plan assets(8,038)(10,142)(16,422)(20,401)
Amortization of prior service cost(24)(22)(47)(44)
Amortization of net actuarial loss1,467 1,877 2,991 3,774 
Net pension income$(409)$(2,809)$(903)$(5,663)