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Non-controlling Interest Narrative (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Jun. 30, 2017
Noncontrolling Interest [Line Items]      
Tax distributions payable to non-controlling LLC Unit holders $ 361 $ 469  
Non-controlling LLC Unit holders ownership in Malibu Boats Holdings, LLC      
Noncontrolling Interest [Line Items]      
Tax distributions payable to non-controlling LLC Unit holders 361   $ 309
Tax distributions paid to non-controlling LLC Unit holders $ 602 $ 583  
Class A Common Stock [Member]      
Noncontrolling Interest [Line Items]      
Issuance LLC Units (in shares) 2,582,797    
Treasury Stock, Common [Member]      
Noncontrolling Interest [Line Items]      
Treasury stock, shares, retired (in shares) (11,381,000)