Employee Benefit Plans - Schedule of net periodic costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Pension Plans | Foreign Plan
Components of net periodic benefit (credit) cost:
Interest cost	$ 300	$ 300	$ 1,000	$ 800
Expected return on assets	(200)	(400)	(800)	(1,000)
Net amortization of prior service credit	0	0	0	0
Amortization of (gain) loss	400	200	1,000	400
Net periodic benefit (credit) cost	500	100	1,200	200
Post-Retirement Benefits
Components of net periodic benefit (credit) cost:
Interest cost	100	100	300	300
Expected return on assets	0	0	0	0
Net amortization of prior service credit	(300)	(300)	(700)	(700)
Amortization of (gain) loss	0	0	0	0
Net periodic benefit (credit) cost	$ (200)	$ (200)	$ (400)	$ (400)