Leases - Other Information Related to Operating Leases (Detail) $ in Thousands	9 Months Ended
	Feb. 29, 2020 USD ($)
Leases [Abstract]
Operating cash flows	$ 8,448
ROU assets obtained in exchange for lease liabilities	$ 3,924
Weighted-average remaining lease term (in years)	5 years 4 months 9 days
Weighted-average discount rate	3.46%
Operating cash flows	$ 28
Financing cash flows	260
ROU assets obtained in exchange for lease liabilities	$ 11,968
Weighted-average remaining lease term (in years)	2 years 10 months 13 days
Weighted-average discount rate	3.23%