Leases - Schedule of Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Feb. 29, 2020	Feb. 29, 2020
Leases [Abstract]
Operating lease expense	$ 3,067	$ 9,289
Amortization of leased assets	178	288
Interest on lease liabilities	9	28
Total financing lease expense	187	316
Short-term lease expense	893	1,889
Variable lease expense	147	451
Total lease expense	$ 4,294	$ 11,945