LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Leases [Abstract]
Operating lease expense	$ 8,722	$ 8,790
Finance lease expense:
Amortization of assets	3,239	2,165
Interest on lease liabilities	555	401
Total finance lease expense	3,794	2,566
Variable and short term-lease expense	4,962	3,933
Total lease expense	$ 17,478	$ 15,289