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Non-controlling Interest - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Non-controlling LLC Unit holders ownership in Malibu Boats Holdings, LLC      
Noncontrolling Interest [Line Items]      
Tax distributions payable to non-controlling LLC Unit holders $ 449   $ 104
Tax distributions paid to non-controlling LLC Unit holders $ 104 $ 568  
Class A Common Stock      
Noncontrolling Interest [Line Items]      
Issuance LLC Units (in shares) 37,408    
Treasury Stock, Common      
Noncontrolling Interest [Line Items]      
Treasury stock, shares, retired (in shares) 2,939