Other Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	$ 94,551	$ 47,351
Accumulated Amortization	(23,345)	(18,013)
Net	71,206	29,338
Customer lists
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	84,815	40,815
Accumulated Amortization	(17,609)	(13,082)
Net	67,206	27,733
Trademarks and other intangible assets
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	9,736	6,536
Accumulated Amortization	(5,736)	(4,931)
Net	$ 4,000	$ 1,605