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Non-controlling Interest Ownership (Details) - shares
Sep. 30, 2017
Jun. 30, 2017
Class of Stock [Line Items]    
Units (in shares) 21,536,155 19,198,314
Ownership % 100.00% 100.00%
Non-controlling LLC Unit holders ownership in Malibu Boats Holdings, LLC | Malibu Boat LLC [Member]    
Class of Stock [Line Items]    
Units (in shares) 1,251,148 1,260,627
Ownership % 5.80% 6.60%
Malibu Boats, Inc. ownership in Malibu Boats Holdings, LLC | Parent Company [Member]    
Class of Stock [Line Items]    
Units (in shares) 20,285,007 17,937,687
Ownership % 94.20% 93.40%