Deferred Compensation and Retirement Plans (Tables)

6 Months Ended

Oct. 31, 2020

Compensation And Retirement Disclosure [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,
	2020			2019			2020			2019
	(in thousands)
Service cost	$	8,197		$	6,474		$	15,480		$	11,930
Interest cost		1,047			1,422			2,080			2,815
Amortization of actuarial loss		996			745			1,993			1,490
Expected return on plan assets (1)		(351	)		(363	)		(702	)		(726	)
Net periodic service credit amortization		(102	)		(77	)		(203	)		(154	)
Net periodic benefit costs (2)	$	9,787		$	8,201		$	18,648		$	15,355

(1) The expected long-term rate of return on plan assets was 6.00% and 6.00% for October 31, 2020 and 2019, 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.