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v3.20.2

Commitment and Contingencies (Details) $ in Thousands | Nov. 27, 2019 actions | Aug. 22, 2019 actions | Jul. 27, 2019 actions | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Repurchase obligations |  |  |  | $ 101,476 | $ 161,356
Financing receivables |  |  |  | $ 44 | $ 375
Number of actions | actions | 2 | 2 | 2 |  |

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- Definition Financing Receivables + References No definition available. + Details
Name: | mbuu_FinancingReceivables
Namespace Prefix: | mbuu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Floor Financing, Repurchase Obligations + References No definition available. + Details
Name: | mbuu_FloorFinancingRepurchaseObligations
Namespace Prefix: | mbuu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Loss Contingency Number Of Actions + References No definition available. + Details
Name: | mbuu_LossContingencyNumberOfActions
Namespace Prefix: | mbuu_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration