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Revenue Recognition - Summary of Percentage on Timing of Revenue Recognition (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Retail Operations [Member]
Disaggregation Of Revenue [Line Items]
Revenue	100.00%	100.00%	100.00%	100.00%
Product Manufacturing [Member]
Disaggregation Of Revenue [Line Items]
Revenue	100.00%	100.00%	100.00%	100.00%
Goods and Services Transferred at a Point in Time [Member] | Retail Operations [Member]
Disaggregation Of Revenue [Line Items]
Revenue	91.20%	92.40%	90.50%	92.20%
Goods and Services Transferred at a Point in Time [Member] | Product Manufacturing [Member]
Disaggregation Of Revenue [Line Items]
Revenue	100.00%	100.00%	100.00%	100.00%
Goods and Services Transferred Over Time [Member] | Retail Operations [Member]
Disaggregation Of Revenue [Line Items]
Revenue	8.80%	7.60%	9.50%	7.80%

X

- Definition

Revenue from contract with customer, percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	hzo_
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Balance Type:	na
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TimingOfTransferOfGoodOrServiceAxis=us-gaap_TransferredAtPointInTimeMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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