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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 6 Months Ended
Oct. 23, 2014
Dec. 31, 2014
Jun. 30, 2014
Goodwill [Line Items]      
Gross Carrying Amount   $ 57,583us-gaap_FiniteLivedIntangibleAssetsGross $ 53,345us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated Amortization   (42,299)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (40,987)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible Assets, Gross (Excluding Goodwill)   15,284us-gaap_IntangibleAssetsGrossExcludingGoodwill 12,358us-gaap_IntangibleAssetsGrossExcludingGoodwill
Franchise Rights [Member]      
Goodwill [Line Items]      
Gross Carrying Amount   1,469us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember
0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_FranchiseRightsMember
Estimated Useful Life (in years) 5 years 5 years  
Weighted Average Remaining Useful Life (in years)   4 years 9 months 23 days  
Dealer Relationship [Member]      
Goodwill [Line Items]      
Gross Carrying Amount   30,002us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= mbuu_DealerRelationshipMember
27,392us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= mbuu_DealerRelationshipMember
Estimated Useful Life (in years) 15 years    
Weighted Average Remaining Useful Life (in years)   14 years 9 months 23 days  
Patents [Member]      
Goodwill [Line Items]      
Gross Carrying Amount   1,386us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
1,386us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember
Estimated Useful Life (in years)   12 years  
Weighted Average Remaining Useful Life (in years)   3 years 6 months 29 days  
Trade Names [Member]      
Goodwill [Line Items]      
Gross Carrying Amount   24,567us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
24,567us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Estimated Useful Life (in years)   15 years  
Weighted Average Remaining Useful Life (in years)   6 years 6 months 29 days  
Noncompete Agreements [Member]      
Goodwill [Line Items]      
Gross Carrying Amount   57us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Estimated Useful Life (in years) 10 years 10 years  
Weighted Average Remaining Useful Life (in years)   9 years 9 months 23 days  
Order or Production Backlog [Member]      
Goodwill [Line Items]      
Gross Carrying Amount   $ 102us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
$ 0us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
Estimated Useful Life (in years) 3 months 22 days 3 months 22 days  
Weighted Average Remaining Useful Life (in years)   0 years 1 month 15 days  
Minimum [Member] | Dealer Relationship [Member]      
Goodwill [Line Items]      
Estimated Useful Life (in years)   8 years  
Maximum [Member] | Dealer Relationship [Member]      
Goodwill [Line Items]      
Estimated Useful Life (in years)   15 years