Quarterly report pursuant to Section 13 or 15(d)

Deferred Compensation and Retirement Plans - Components of Net Periodic Benefits Costs (Detail)

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Deferred Compensation and Retirement Plans - Components of Net Periodic Benefits Costs (Detail) - Deferred Compensation Plan - USD ($)
$ in Thousands
 3 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 8,679 $ 7,283
Interest cost 1,019 1,033
Amortization of actuarial loss 543 997
Expected return on plan assets [1] (387) (351)
Net periodic service credit amortization (101) (101)
Net periodic benefit costs [2] $ 9,753 $ 8,861
[1] The expected long-term rate of return on plan assets was 6.00% and 6.00% for July 31, 2021 and 2020, 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 income, net, respectively, on the consolidated statements of operations.