Leases - Other Information Related to Operating Leases (Detail) $ in Thousands	12 Months Ended
	May 31, 2020 USD ($)
Leases [Abstract]
Operating cash flows	$ 11,531
ROU assets obtained in exchange for lease liabilities	$ 4,954
Weighted-average remaining lease term (in years)	5 years 2 months 26 days
Weighted-average discount rate	2.89%
Operating cash flows	$ 61
Financing cash flows	361
ROU assets obtained in exchange for lease liabilities	$ 15,217
Weighted-average remaining lease term (in years)	31 years 4 months 17 days
Weighted-average discount rate	3.68%