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Significant Accounting Policies - Estimated Life of Property and Equipment (Detail)	12 Months Ended
	Sep. 30, 2013
Minimum [Member] | Building and Building Improvements [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	5 years
Minimum [Member] | Machinery and Equipment [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	3 years
Minimum [Member] | Furniture and Fixtures [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	5 years
Minimum [Member] | Vehicles [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	3 years
Maximum [Member] | Building and Building Improvements [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	40 years
Maximum [Member] | Machinery and Equipment [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	10 years
Maximum [Member] | Furniture and Fixtures [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	10 years
Maximum [Member] | Vehicles [Member]
Depreciation Amortization Impairment [Line Items]
Property and equipment useful life	5 years

X

- Details

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Namespace Prefix:	hzo_
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X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration