Leases (Supplemental Cash Flow Information) (Details) $ in Thousands	6 Months Ended
	Feb. 29, 2020 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 55,592
Operating cash flows for finance leases	2,443
Financing activities for finance leases	2,808
Non-cash right-of-use assets obtained in exchange for new lease liabilities:
Operating leases	34,213
Finance leases	$ 111,591