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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Floor Financing (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Floor Financing Accrual [Roll Forward] |  |  |
Balance at beginning of year | $ 1,429 | $ 1,134 | $ 187
Add: Flooring incentives | 13,811 | 17,590 | 13,926
Less: Flooring paid | (13,813) | (17,295) | (12,979)
Balance at end of year | $ 1,427 | $ 1,429 | $ 1,134

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

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- Definition Floor Financing Accrual [Roll Forward] + References No definition available. + Details
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Namespace Prefix: | mbuu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Floor Financing, Expense + References No definition available. + Details
Name: | mbuu_FloorFinancingExpense
Namespace Prefix: | mbuu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Floor Financing, Payments + References No definition available. + Details
Name: | mbuu_FloorFinancingPayments
Namespace Prefix: | mbuu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration