Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Income Tax [Line Items]
Foreign capital loss carryforwards	$ 23,500,000
Total Valuation Allowances	30,033,000	$ 30,509,000
Unrecognized tax benefits that would impact effective tax rate, if recognized	2,900,000	5,600,000	$ 7,000,000.0
Accrued interest and penalties related to unrecognized tax benefits	2,200,000	3,200,000	$ 2,900,000
Unremitted foreign earnings	204,600,000
Deferred income tax liability	990,000	$ 3,002,000
Remaining unremitted foreign earnings	1,200,000,000
Provision for deferred income taxes	0
State
Income Tax [Line Items]
Net operating loss carryforwards	$ 3,200,000
Net operating loss carryforwards beginning expiration year	2024
Foreign
Income Tax [Line Items]
Tax credit carryforwards	$ 31,800,000
Tax credit carryforwards expiration year	2032
Foreign Net Operating Loss Carryforwards
Income Tax [Line Items]
Net operating loss carryforwards	$ 148,200,000
Net operating loss carryforwards beginning expiration year	2024
Net operating loss carryforwards subject to expiration	$ 37,500,000
Net operating loss carryforwards indefinite carry forward period	$ 110,700,000