Leases, Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Leases [Abstract]
Operating Lease, Cost	$ 32,752	$ 35,611
Finance lease expense:
Amortization of assets	13,050	11,445
Interest on lease liabilities	2,213	1,792
Total finance lease expense	15,263	13,237
Variable and short-term lease expense	20,096	17,020
Total lease expense	$ 68,111	$ 65,868