Goodwill and Other Intangible Assets Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Aug. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 900	$ 1,300
Other Intangible Assets [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
Other Intangible Assets [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Carrying Amount	$ 42,391		$ 46,180
Finite-Lived Intangible Assets, Accumulated Amortization	(11,695)		(14,695)
Finite-Lived Intangible Assets, Net	30,696		31,485
Trademarks and other intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Carrying Amount	6,536		23,623
Finite-Lived Intangible Assets, Accumulated Amortization	(4,752)		(21,778)
Finite-Lived Intangible Assets, Net	1,784		1,845
Total intangible assets [Domain]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Carrying Amount	48,927		69,803
Finite-Lived Intangible Assets, Accumulated Amortization	(16,447)		(36,473)
Finite-Lived Intangible Assets, Net	$ 32,480		$ 33,330