LEASES - Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	May 31, 2021	Aug. 31, 2020
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Year 1	$ 32,255
Year 2	26,992
Year 3	21,553
Year 4	16,576
Year 5	12,303
Thereafter	32,922
Total lease payments	142,601
Less imputed interest	19,739
Present value of lease liabilities	122,862	$ 123,414
Finance Lease, Liability, Payment, Due [Abstract]
Year 1	17,495
Year 2	15,228
Year 3	12,637
Year 4	8,229
Year 5	2,238
Thereafter	758
Total lease payments	56,585
Less imputed interest	4,215
Present value of lease liabilities	$ 52,370	$ 50,224