Deferred Compensation and Retirement Plans (Tables)

6 Months Ended

Oct. 31, 2018

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,
	2018			2017			2018			2017
	(in thousands)
Service cost	$	4,532		$	3,079		$	8,178		$	5,144
Interest cost		1,330			1,045			2,626			2,065
Amortization of actuarial loss		446			577			892			1,154
Expected return on plan assets (1)		(392	)		(398	)		(784	)		(797	)
Net periodic service credit amortization		(77	)		-			(154	)		-
Net periodic benefit costs (2)	$	5,839		$	4,303		$	10,758		$	7,566

(1) The expected long-term rate of return on plan assets is 6.25% and 6.50% for October 31, 2018 and 2017, 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.