XML 80 R66.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Employee 401(k) Profit Sharing Plans - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Compensation and Retirement Disclosure [Abstract] |  |  |
Duration of profit sharing plan | 90 days |  |
Introductory period of profit sharing | April 1 or October 1 |  |
Employees eligibility age for participating in profit sharing plan | 21 years |  |
Total participants contributions in Profit sharing plan | 25.00% |  |
Maximum of each participants compensation | 5.00% |  |
Contribution under the Profit sharing plan | $ 463,000 | $ 440,000 | $ 298,000

X
- Definition Duration of profit sharing plan. + References No definition available. + Details
Name: | hzo_DurationOfProfitSharingPlan
Namespace Prefix: | hzo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Employees eligibility age for participating in profit sharing plan. + References No definition available. + Details
Name: | hzo_EmployeesEligibilityAgeForParticipatingInProfitSharingPlan
Namespace Prefix: | hzo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Introductory period of profit sharing plan. + References No definition available. + Details
Name: | hzo_IntroductoryPeriodOfProfitSharingPlan
Namespace Prefix: | hzo_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration