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Deferred Compensation and Retirement Plans (Tables)
 6 Months Ended
Oct. 31, 2022
Retirement Benefits [Abstract]  
Components of Net Periodic Benefits Costs
The components of net periodic benefit costs are as follows:
Three Months Ended
October 31, 		Six Months Ended
October 31,
2022202120222021
(in thousands)
Service cost$10,484 $9,749 $19,627 $18,428 
Interest cost2,437 1,038 4,824 2,057 
Amortization of actuarial loss218 542 436 1,085 
Expected return on plan assets (1)(289)(386)(578)(773)
Net periodic service credit amortization(102)(102)(203)(203)
Net periodic benefit costs (2)$12,748 $10,841 $24,106 $20,594 
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(1)
The expected long-term rate of return on plan assets was 5.50% and 6.00% for October 31, 2022 and 2021, respectively.
(2)The service cost, interest cost and the other components of net periodic benefit costs are included in compensation and benefits expense, interest expense, net and other (loss) income, net, respectively, on the consolidated statements of income.