LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Leases [Abstract]
Operating lease expense	$ 8,651	$ 8,815	$ 17,373	$ 17,605
Finance lease expense:
Amortization of assets	3,219	2,720	6,458	4,885
Interest on lease liabilities	563	465	1,118	866
Total finance lease expense	3,782	3,185	7,576	5,751
Variable and short-term lease expense	4,324	4,381	9,286	8,314
Total lease expense	$ 16,757	$ 16,381	$ 34,235	$ 31,670