Leases - Schedule of Future Minimum Lease Payments for Non-Cancelable Operating Leases (Detail) - USD ($) $ in Thousands	Feb. 29, 2020	Jun. 01, 2019	May 31, 2019
Leases [Abstract]
Year 1	$ 11,961		$ 10,774
Year 2	9,850		8,398
Year 3	7,595		5,428
Year 4	4,543		4,054
Year 5	3,043		2,098
Thereafter	5,856		2,637
Total	42,848		$ 33,389
Less: imputed interest	(4,250)
Present value of lease liabilities	38,598	$ 43,400
Year 1	384
Year 2	373
Year 3	329
Total	1,086
Less: imputed interest	(48)
Present value of lease liabilities	$ 1,038