Receivables Schedule of Deferred Purchase Price (Details) - USD ($) $ in Thousands	9 Months Ended
	May 31, 2018	Aug. 31, 2017	May 31, 2017
Receivables [Abstract]
Availability under Securitization Facility	$ 592,000
Deferred purchase price receivable	464,516	$ 548,602	$ 0
Monthly settlements, net	(89,160)
Cash collections	(9,612)
Fair value adjustment	$ 14,686