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Acquisition - Pro-Forma Financial Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Business Combinations [Abstract]    
Net sales $ 497,002 $ 423,830
Net income 30,696 33,655
Net income attributable to Malibu Boats, Inc. $ 27,361 $ 30,439
Basic earnings per share (in dollars per share) $ 1.36 $ 1.53
Diluted earnings per share (in dollars per share) $ 1.35 $ 1.52