Leases (Supplemental Cash Flow Information) (Details) $ in Thousands	3 Months Ended
	Nov. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 26,864
Operating cash flows from finance leases	1,189
Financing activities from finance leases	1,120
Non-cash right-of-use assets obtained in exchange for new lease liabilities:
Operating leases	17,901
Finance leases	$ 111,591