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Acquisition Intangible Assets Acquired (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	9 Months Ended
	Oct. 23, 2014	Mar. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Preliminary Estimates of Fair Value	$ 4,558us-gaap_FinitelivedIntangibleAssetsAcquired1
Franchise Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Preliminary Estimates of Fair Value	1,579us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_FranchiseRightsMember
Finite-Lived Intangible Asset, Useful Life	5 years	5 years
Dealer Relationship [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Preliminary Estimates of Fair Value	2,808us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = mbuu_DealerRelationshipMember
Finite-Lived Intangible Asset, Useful Life	15 years
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Preliminary Estimates of Fair Value	61us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Finite-Lived Intangible Asset, Useful Life	10 years	10 years
Order or Production Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Preliminary Estimates of Fair Value	$ 110us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OrderOrProductionBacklogMember
Finite-Lived Intangible Asset, Useful Life	3 months 22 days	3 months 22 days

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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