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Company Background and Basis of Presentation - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2013 Store Location	Sep. 30, 2012	Sep. 30, 2011
Product Information [Line Items]
Number of retail locations	54
Number of states wherein retail locations are established	18
Economic conditions in Florida, Revenue	51.00%	49.00%	50.00%
Azimut Yachts [Member]
Product Information [Line Items]
Revenue percentage from sale of boats	13.00%
Brunswick Boats [Member] | Sales [Member]
Product Information [Line Items]
Revenue percentage from sale of boats	38.00%
Brunswick [Member] | Brunswick Sea Ray Boat [Member] | Sales [Member]
Product Information [Line Items]
Revenue percentage from sale of boats	49.00%

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- Definition

Economic conditions geographic revenue percentage.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

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The number of states the entity operates in as of the balance sheet date.

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Represents the number of stores.

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