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Fire At Bus Production Facility (Details) (USD $) In Thousands	3 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Fire At Bus Production Facility [Abstract]
Amount deductible per the policy	$ 5,000
Business interruption portion of insurance proceeds		2,323
Insurance proceeds received for losses incurred		5,384
Insurance proceeds recognized in current year, previously deferred		70
Gain on business interruption insurance recovery		4,802
Clean-up and other costs		652
Related costs or additional insurance proceeds	$ 0

X

- Definition

Amount deductible per the policy.

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- Definition

Amount of related costs or additional insurance proceeds.

+ Details

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- Definition

Business interruption portion of insurance proceeds.

+ Details

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- Definition

Clean-up and other costs.

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- Definition

Fire At Bus Production Facility [Abstract]

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- Definition

Insurance proceeds received for losses incurred.

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- Definition

Insurance proceeds recognized in current year, previously deferred

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- Definition

The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire.

+ References

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

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 01-13

-Paragraph 7

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 225

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6365675&loc=d3e16285-107787

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