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Nature Of Operations And Accounting Policies (Policy)	3 Months Ended
	Oct. 31, 2011
Nature Of Operations And Accounting Policies [Abstract]
Nature Of Operations	Nature of Operations - Thor Industries, Inc. was founded in 1980 and, together with its subsidiaries (the "Company"), manufactures a wide range of recreation vehicles and small and mid-size buses at various manufacturing facilities across the United States. These products are sold to independent dealers and municipalities primarily throughout the United States and Canada. Unless the context otherwise requires or indicates, all references to "Thor", the "Company", "we", "our", and "us" refer to Thor Industries, Inc. and its subsidiaries. The Company's core business activities are comprised of three distinct operations, which include the design, manufacture and sale of towable recreation vehicles, motorized recreation vehicles and buses. Accordingly, the Company has presented segment financial information for these three segments in Note 6 to the Condensed Consolidated Financial Statements.

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- Definition

The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings).

+ References

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

-Name Statement of Position (SOP)

-Publisher AICPA

-Number 94-6

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6003-108592

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