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Non-controlling Interest - Ownership (Details) - shares
Dec. 31, 2019
Jun. 30, 2019
Class of Stock [Line Items]    
Units (in shares) 21,413,601 21,682,792
Ownership percentage 100.00% 100.00%
Non-controlling LLC Unit holders ownership in Malibu Boats Holdings, LLC | Malibu Boat LLC    
Class of Stock [Line Items]    
Units (in shares) 830,152 830,152
Ownership percentage 3.90% 3.80%
Malibu Boats, Inc. ownership in Malibu Boats Holdings, LLC | Parent Company    
Class of Stock [Line Items]    
Units (in shares) 20,583,449 20,852,640
Ownership percentage 96.10% 96.20%