Acquisition, Restructuring and Other Items, net - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	$ 9,042	$ 20,232	$ 6,014
Legal
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	$ 7,625	6,161	2,666
Legal | Biolitec, Inc.
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net			$ 500
Settlement Expense
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net		$ 1,000