Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Thousands	3 Months Ended	9 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, 2010 SJC [Member]	Jul. 31, 2010 Buses [Member] SJC [Member]	Jul. 31, 2011 Towables [Member]	Jul. 31, 2010 Towables [Member]	Jul. 31, 2009 Towables [Member]	Jul. 31, 2011 Motorized [Member]	Jul. 31, 2010 Motorized [Member]	Jul. 31, 2009 Motorized [Member]	Jul. 31, 2011 Buses [Member]	Jul. 31, 2010 Buses [Member]	Jul. 31, 2009 Buses [Member]
Goodwill		$ 168,153	$ 261,704	$ 165,663					$ 237,346	$ 143,795	$ 143,795	$ 17,252	$ 17,252	$ 17,252	$ 7,106	$ 7,106	$ 4,616
Accumulated impairment charges		(17,252)	(17,252)	(17,252)								(17,252)	(17,252)	(17,252)
Goodwill, Balance at July 31, 2010		150,901	244,452	148,411					237,346	143,795	143,795				7,106	7,106	4,616
Goodwill acquired					93,551	93,551	2,490	2,490
Goodwill, impairment	9,717	0
Goodwill			261,704	165,663					237,346	143,795	143,795	17,252	17,252	17,252	7,106	7,106	4,616
Accumulated impairment charges			(17,252)	(17,252)								(17,252)	(17,252)	(17,252)
Goodwill, Balance at July 31, 2011			$ 244,452	$ 148,411					$ 237,346	$ 143,795	$ 143,795				$ 7,106	$ 7,106	$ 4,616

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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-Name Statement of Financial Accounting Standard (FAS)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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+ Details

- Definition

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.

+ References+ Details

- Definition

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.

+ References

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+ Details