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PROPERTY, PLANT AND EQUIPMENT (Details Textuals) (USD $) In Thousands	12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Depreciation expense for the property, plant and equipment	$ 84,461	$ 81,861	$ 79,420

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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