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Summary of Significant Accounting Policies (Summary On Estimated Useful Life Of Property, Plant And Equipment) (Details) | 12 Months Ended
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Jul. 31, 2012
Software [Member] |
Estimated life in years | 3 years
Minimum [Member] | Land Improvements [Member] |
Estimated life in years | 10 years
Minimum [Member] | Buildings and Building Improvements [Member] |
Estimated life in years | 7 years
Minimum [Member] | Machinery and Equipment [Member] |
Estimated life in years | 2 years
Minimum [Member] | Furniture and Fixtures [Member] |
Estimated life in years | 3 years
Minimum [Member] | Vehicles [Member] |
Estimated life in years | 3 years
Maximum [Member] | Land Improvements [Member] |
Estimated life in years | 35 years
Maximum [Member] | Buildings and Building Improvements [Member] |
Estimated life in years | 30 years
Maximum [Member] | Machinery and Equipment [Member] |
Estimated life in years | 30 years
Maximum [Member] | Furniture and Fixtures [Member] |
Estimated life in years | 10 years
Maximum [Member] | Vehicles [Member] |
Estimated life in years | 4 years

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration