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Description Of Business And Summary Of Significant Accounting Policies (Detail Textuals) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	6 Months Ended		3 Months Ended
	Mar. 08, 2012	Jan. 31, 2013 Segment	Jan. 31, 2013 Interest Rate Swap Derivative	Jan. 31, 2013 Loss from Catastrophes
Description Of Business and Summary Of Significant Accounting Policies [Line Items]
Stock split	two-for-one
Tax benefits recognized provided percentage of likelihood of realization is more than		50.00%
Loss on expended additional costs due to contingency				$ 11.9
Negative after tax impact on diluted earnings per share				$ 0.06
Number of operating segments		2
Number of reportable segment		1
Number of interest rate derivatives held			2

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This element represents loss impact on diluted earning per share.

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Represents the tax benefits recognized provided percentage of likelihood of realization is more than during the period.

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Number of interest rate derivative instruments held by the entity at the reporting date.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Description of the stock split arrangement. Also provide the retroactive effect given by a stock split that occurs after the balance date but before the release of financial statements.

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section B

-Paragraph 2, 15, 16

-Chapter 7

-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.



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