Summary of Purchase Price Allocation (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2010
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Sand and chemical inventory	$ 6,848
Supplies	312
Property and equipment	154,359
Deferred tax asset	8,514
Goodwill	67,575
Below-market pricing agreements	(23,200)
Total purchase price	241,308
Non-compete Agreement
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Customer relationships	1,400
Customer Relationships
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
Customer relationships	$ 25,500

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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.

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- Definition

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of acquisition cost of a business combination allocated to merchandise inventory.

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The amount of acquisition cost of a business combination allocated to raw materials inventory.

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The amount of acquisition cost of a business combination allocated to deferred revenue of the acquired entity.

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Amount of acquisition cost of a business combination allocated to noncurrent deferred tax assets net of valuation allowance and noncurrent deferred tax liabilities.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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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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