Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012	Aug. 31, 2011
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 11,623	$ 10,552
Plant and equipment	346,087	330,273
Construction in progress	7,679	6,375
Total	365,389	347,200
Accumulated depreciation	(252,198)	(239,828)
Net property and equipment	$ 113,191	$ 107,372

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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