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Stockholder's Equity (Details)
 12 Months Ended
Jun. 30, 2021
unit_holder
vote
$ / shares
shares
Jun. 30, 2020
USD ($)
unit_holder
$ / shares
shares
Jun. 30, 2019
unit_holder
shares
Aug. 27, 2020
USD ($)
Jun. 18, 2019
USD ($)
Class of Stock [Line Items]          
Capital stock, shares authorized (in shares) 150,000,000        
Preferred stock, shares authorized (in shares) 25,000,000 25,000,000      
Preferred stock, par value (in dollars per share) | $ / shares $ 0.01 $ 0.01      
Number of unit holders | unit_holder 9 4 5    
Stock repurchased during period | $   $ 13,833,000      
Number of votes | vote 1        
Common stock, conversion basis 1        
Number of LLC units outstanding (in shares) 21,447,938 21,326,621      
Ownership percentage 100.00% 100.00%      
Class A Common Stock          
Class of Stock [Line Items]          
Common stock, shares authorized (in shares) 100,000,000 100,000,000      
Common stock, shares, outstanding (in shares) 20,847,019 20,595,969      
Stock repurchase program, authorized amount | $       $ 50,000,000 $ 35,000,000
Stock repurchased during period (in shares) 0 483,679      
Stock repurchased during period | $   $ 13,800,000      
Class B Common Stock          
Class of Stock [Line Items]          
Common stock, shares authorized (in shares) 25,000,000 25,000,000      
Treasury stock, shares, retired (in shares) 5 0 2    
Common stock, shares, outstanding (in shares) 10 15 15    
Malibu Boats, Inc. ownership in Malibu Boats Holdings, LLC          
Class of Stock [Line Items]          
Number of LLC units outstanding (in shares) 20,847,019 20,595,969      
Ownership percentage 97.20% 96.60%      
Non-controlling Interest in LLC          
Class of Stock [Line Items]          
Number of LLC units outstanding (in shares) 600,919 730,652      
Ownership percentage 2.80% 3.40%