Employee Benefit Plans - Schedule of net periodic costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Pension Plans | Foreign Plan
Components of net periodic benefit (credit) cost:
Interest cost	$ 400	$ 300	$ 1,000	$ 1,000
Expected return on assets	(300)	(200)	(800)	(800)
Net amortization of prior service credit	0	0	0	0
Amortization of (gain) loss	400	400	1,100	1,000
Net periodic benefit (credit) cost	500	500	1,300	1,200
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	(100)	(0)	(100)	(0)
Net periodic benefit (credit) cost	$ (300)	$ (200)	$ (500)	$ (400)