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Acquisition, Restructuring and Other Items, Net - Summary (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	$ 610	$ 1,565	$ 3,057	$ 4,486
Legal
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	967	637	2,947	1,989
Mergers and acquisitions
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	0	154	1	782
Transition service agreement
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	(323)	(386)	(1,032)	(1,720)
Divestiture
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	8	781	393	2,241
Restructuring
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	0	0	0	26
Other
Restructuring Cost and Reserve [Line Items]
Acquisition, restructuring and other items, net	$ (42)	$ 379	$ 748	$ 1,168

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