Other Assets Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Goodwill [Line Items]
Goodwill	$ 160,414	$ 150,115	$ 158,696
Goodwill, Acquired During Period	9,774	423
Goodwill, Acquired During Period, Net of Purchase Accounting Adjustments		(3,283)
Goodwill, Translation Adjustments	1,220	(5,298)
Goodwill, Written off Related to Sale of Business Unit	(695)
Energy [Member]
Goodwill [Line Items]
Goodwill	552	552	552
Goodwill, Acquired During Period	0
Goodwill, Acquired During Period, Net of Purchase Accounting Adjustments		0
Goodwill, Translation Adjustments	0	0
Goodwill, Written off Related to Sale of Business Unit	0
Ag [Member]
Goodwill [Line Items]
Goodwill	148,916	142,665	151,246
Goodwill, Acquired During Period	5,726
Goodwill, Acquired During Period, Net of Purchase Accounting Adjustments		(3,283)
Goodwill, Translation Adjustments	1,220	(5,298)
Goodwill, Written off Related to Sale of Business Unit	(695)
Corporate and Other [Member]
Goodwill [Line Items]
Goodwill	10,946	6,898	$ 6,898
Goodwill, Acquired During Period	4,048
Goodwill, Acquired During Period, Net of Purchase Accounting Adjustments		0
Goodwill, Translation Adjustments	0	$ 0
Goodwill, Written off Related to Sale of Business Unit	$ 0

Goodwill, Acquired During Period, Net of Purchase Accounting Adjustments

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

+ Details

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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