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Schedule of Changes In Product Warranty Reserves (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Product Warranty
Beginning balance	$ 73,280	$ 66,054	$ 51,467
Provision	93,374	74,491	61,922
Payments	(78,513)	(67,265)	(57,514)
Heartland acquisition			10,179
Discontinued operations reclassification	(3,891)
Ending balance	$ 84,250	$ 73,280	$ 66,054

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Standard Product Warranty Accrual, Discontinued Operations Reclassification

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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-Publisher FASB

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Liability for a standard product warranty acquired in a business acquisition. Does not include any liability for an extended warranty acquired in a business acquisition.

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Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties.

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Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties.

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