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Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Inventory [Line Items]
Inventories, net	$ 273,875	$ 244,151
New Boats, Motors, and Trailers [Member]
Inventory [Line Items]
Inventories, net	230,359	200,318
Used Boats, Motors, and Trailers [Member]
Inventory [Line Items]
Inventories, net	36,992	37,191
Parts, Accessories, and Other [Member]
Inventory [Line Items]
Inventories, net	$ 6,524	$ 6,642

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



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-Paragraph 1



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Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



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Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



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