Pension Plans (Tables)

6 Months Ended

Nov. 30, 2020

Retirement Benefits [Abstract]

Components of Net Periodic Benefit Cost

The components of net periodic pension benefit are summarized as follows:

	Three Months Ended				Six Months Ended
(In thousands)	November 30, 2020		November 30, 2019		November 30, 2020		November 30, 2019
Interest cost	$	513	$	721	$	1,025	$	1,441
Expected return on assets	(731)		(741)		(1,462)		(1,481)
Amortization of net loss	55		—		111		—
Net periodic pension benefit	$	(163)	$	(20)	$	(326)	$	(40)