Acquisitions (Allocation Of Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2012
Acquisitions [Abstract]
Inventories	$ 2,947
Property and equipment	20,415
Total assets	23,362
Accrued expenses	282
Total liabilities	282
Net tangible assets acquired	23,080
Goodwill	16,364
Total consideration paid	$ 39,444

Business Acquisition, Purchase Price Allocation, Goodwill And Other Intangible Assets

No definition available.

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- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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The amount of acquisition cost of a business combination allocated to assets acquired.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

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- Definition

The amount of acquisition cost of a business combination allocated to inventory, including finished goods, work-in-process, and raw materials.

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-Name Statement of Financial Accounting Standard (FAS)

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The amount of acquisition cost of a business combination allocated to accrued expenses of the acquired entity.

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 98-1

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The amount of acquisition cost of a business combination allocated to net tangible assets.

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- Definition

The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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