Deferred Compensation and Retirement Plans (Tables)

3 Months Ended

Jul. 31, 2019

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefits Costs

The components of net periodic benefit costs are as follows:

	Three Months Ended July 31,
	2019			2018
	(in thousands)
Service cost	$	5,456		$	3,646
Interest cost		1,393			1,296
Amortization of actuarial loss		745			446
Expected return on plan assets (1)		(363	)		(392	)
Net periodic service credit amortization		(77	)		(77	)
Net periodic benefit costs (2)	$	7,154		$	4,919

(1) The expected long-term rate of return on plan assets was 6.00% and 6.25% for July 31, 2019 and 2018, 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.