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The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Amount of potential cash payments that could result from the contingent consideration arrangement.

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Amount of cash paid to acquire the entity.

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Percentage of voting equity interests acquired in the business combination.

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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The amount of acquisition cost of a business combination allocated to capital lease obligations assumed from the acquired entity.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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The average useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Acquisition (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended		12 Months Ended				12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009	Sep. 16, 2010	Jul. 31, 2011 Towable Holdings, Inc. [Member]	Sep. 16, 2010 Towable Holdings, Inc. [Member]	Jul. 31, 2011 SJC Industries Corp. [Member]	Jul. 31, 2010 SJC Industries Corp. [Member]	Mar. 01, 2010 SJC Industries Corp. [Member]	Mar. 01, 2010 SJC Industries Corp. [Member] Trade Names [Member]	Jul. 31, 2011 SJC Industries Corp. [Member] Technology Assets [Member]	Jul. 31, 2011 SJC Industries Corp. [Member] Non-Compete Agreements [Member]	Mar. 01, 2010 SJC Industries Corp. [Member] Non-Compete Agreements [Member]	Mar. 01, 2010 SJC Industries Corp. [Member] Technology [Member]	Jul. 31, 2011 SJC Industries Corp. [Member] Dealer Networks [Member]	Mar. 01, 2010 SJC Industries Corp. [Member] Dealer Networks [Member]	Jul. 31, 2011 Heartland Recreational Vehicles, LLC [Member]	Sep. 16, 2010 Heartland Recreational Vehicles, LLC [Member]	Jul. 31, 2011 Heartland Recreational Vehicles, LLC [Member] Trademarks [Member]	Sep. 16, 2010 Heartland Recreational Vehicles, LLC [Member] Trademarks [Member]	Jul. 31, 2011 Heartland Recreational Vehicles, LLC [Member] Technology Assets [Member]	Sep. 16, 2010 Heartland Recreational Vehicles, LLC [Member] Technology Assets [Member]	Jul. 31, 2011 Heartland Recreational Vehicles, LLC [Member] Non-Compete Agreements [Member]	Sep. 16, 2010 Heartland Recreational Vehicles, LLC [Member] Non-Compete Agreements [Member]	Jul. 31, 2011 Heartland Recreational Vehicles, LLC [Member] Backlog [Member]	Sep. 16, 2010 Heartland Recreational Vehicles, LLC [Member] Backlog [Member]	Jul. 31, 2011 Heartland Recreational Vehicles, LLC [Member] Dealer Networks [Member]	Sep. 16, 2010 Heartland Recreational Vehicles, LLC [Member] Dealer Networks [Member]
Cash paid for acquisition						$ 99,562			$ 19,756
Shares issued of unregistered common stock					4,300,000
Value of shares issued of unregistered common stock						90,531
Business Combination Additional Consideration Accrued					170
Acquisition, transaction costs					1,826
Adjustments to provisional estimates reducing net taxes and goodwill				1,300
Capital lease obligations assumed																		429
Weighted average useful life on amortized intangible assets, years							13.4										14.9
Amortization period, Minimum years	20																				10
Amortizable intangible assets being amortized using straight line method over, maximum years	25																				15
Amortizable intangible assets using straight line method over											5	5			14				25				5		3		12
Goodwill acquired that remains deductible for tax purposes																		11,600
Net sales								13,218									365,389
Net income before tax	152,627	171,393	23,395														13,132
One-time costs related to the step-up of Finished goods inventory																	746
Amortizable intangible assets										2,100			120	270		5,230				25,200		21,300		4,130		690		67,000
Ongoing amortization costs related to heartland acquisition																	8,563
Acquired total voting interest through business acquisition									100.00%
Future cash obligations									325
Total purchase price agreement									$ 20,081