Commitments and Contingencies (Details) (USD $)	3 Months Ended	6 Months Ended
Feb. 28, 2013	Feb. 28, 2013	Sep. 04, 2012 E.C.M. Plastics Inc. [Member]
Commitments and Contingencies [Line Items]
Purchase consideration			$ 36,400,000
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	$ 1,800,000	$ 1,800,000

The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 21

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration