Leases - Schedule of Future Minimum Lease Payments for Non-Cancelable Operating Leases (Detail) - USD ($) $ in Thousands	Nov. 30, 2019	Jun. 01, 2019	May 31, 2019
Leases [Abstract]
Year 1	$ 12,436		$ 10,774
Year 2	10,312		8,398
Year 3	8,014		5,428
Year 4	5,256		4,054
Year 5	3,265		2,098
Thereafter	6,554		2,637
Total	45,837		$ 33,389
Less: imputed interest	(4,571)
Present value of lease liabilities	41,266	$ 43,400
Year 1	384
Year 2	376
Year 3	369
Year 4	53
Total	1,182
Less: imputed interest	(56)
Present value of lease liabilities	$ 1,126