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Company Background and Basis of Presentation - Additional Information (Detail) | 12 Months Ended
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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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