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Goodwill And Other Intangible Assets (Change In Carrying Value In Goodwill And Indefinite-Lived Trademarks) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended	12 Months Ended		12 Months Ended					12 Months Ended
	Apr. 30, 2009	Apr. 30, 2011	Jul. 31, 2011	Jul. 31, 2009	Jul. 31, 2011 Heartland [Member]	Jul. 31, 2011 Heartland [Member] Towables [Member]	Jul. 31, 2011 Towables [Member]	Jul. 31, 2010 Towables [Member]	Jul. 31, 2009 Towables [Member]	Jul. 31, 2011 Motorized [Member]	Jul. 31, 2011 Buses [Member]	Jul. 31, 2009 Buses [Member]
Goodwill, Balance at July 31, 2010		$ 150,901	$ 150,901	$ 148,411			$ 237,346	$ 143,795	$ 143,795		$ 7,106	$ 4,616
Goodwill, impairment	9,717	0
Goodwill, Amounts resulting from Heartland acquisition in towables reportable segment					93,551	93,551
Goodwill, Balance at July 31, 2011			244,452	148,411			237,346	143,795	143,795		7,106	4,616
Trademarks, Balance at July 31, 2010		14,936	14,936				33,950	9,737		2,036	3,163
Trademark, Impairment		0								(2,036)	(1,430)
Trademarks, Amounts resulting from Heartland acquisition in towables reportable segment
Trademarks, Reclassification from indefinite lived intangible assets to definite lived assets			(11,470)
Trademarks, Balance at July 31, 2011			$ 35,661				$ 33,950	$ 9,737			$ 1,711

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Reclassification from indefinite lived intangible assets to definite lived assets, trademarks.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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Carrying amount of intangible assets, excluding goodwill, which have a projected indefinite period of benefit (hence are not amortized), allocated to the reportable segment. These assets, acquired either individually or as part of a group of assets, in either an asset acquisition or business combination, are assessed at least annually for impairment. Examples may include trade secrets, contractual rights, trade names, and licensing agreements.

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