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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Dealer Rebates (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Dealer Rebate Accrual [Roll Forward] |  |  |
Balance at beginning of year | $ 27,482 | $ 13,715 | $ 15,852
Add: Dealer rebate incentives | 3,873 | 28,385 | 32,953
Less: Dealer rebates paid | (25,725) | (14,618) | (35,090)
Balance at end of year | $ 5,630 | $ 27,482 | $ 13,715

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- Definition Accrued Dealer Rebates, Current + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Change In Accrual For Dealer Rebates [Table Text Block] + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Dealer Rebate Accrual [Roll Forward] + References No definition available. + Details
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Namespace Prefix: | mbuu_
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Balance Type: | na
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- Definition Payments Of Dealer Rebates + References No definition available. + Details
Name: | mbuu_PaymentsOfDealerRebates
Namespace Prefix: | mbuu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration