Goodwill and Intangibles Goodwill by Segment (Details) - USD ($) $ in Thousands	9 Months Ended
	May. 31, 2015	Aug. 31, 2014
Goodwill [Line Items]
Goodwill	$ 156,450	$ 158,696
Goodwill, Acquired During Period	1,213
Goodwill, Translation Adjustments	(3,459)
Energy [Member]
Goodwill [Line Items]
Goodwill	552	552
Goodwill, Acquired During Period	0
Goodwill, Translation Adjustments	0
Ag [Member]
Goodwill [Line Items]
Goodwill	149,000	151,246
Goodwill, Acquired During Period	1,213
Goodwill, Translation Adjustments	(3,459)
Corporate and Other
Goodwill [Line Items]
Goodwill	6,898	$ 6,898
Goodwill, Acquired During Period	0
Goodwill, Translation Adjustments	$ 0