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Stockholder's Equity (Details) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 14, 2017 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) unit_holder vote $ / shares shares | Jun. 30, 2018 USD ($) unit_holder $ / shares shares | Jun. 30, 2017 USD ($) unit_holder shares | Jun. 18, 2019 USD ($) | Jul. 06, 2017 shares
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 |  |  |
Proceeds from issuance of common stock | $ | $ 58,075,000 |  |  |  |  |
Proceeds from issuance of common stock net of discounts and commissions | $ | 55,317,000 | $ 0 | $ 55,317,000 | $ 0 |  |
Underwriting discounts and commissions | $ | 2,758,000 |  |  |  |  |
Amount of debt prepayment | $ | $ 50,000,000 | $ 35,000,000 | $ 50,000,000 | $ 72,000,000 |  |
Number of unit holders | unit_holder |  | 5 | 11 | 4 |  |
Number of votes | vote |  | 1 |  |  |  |
Common stock, conversion basis |  | 1 |  |  |  |
Number of LLC units outstanding (in shares) |  | 21,682,792.000 | 21,598,534.000 |  |  |
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 issued (in shares) | 2,300,000 | 20,852,640 | 20,555,348 |  |  | 39,262,000
Share price (in dollars per share) | $ / shares | $ 24.05 |  |  |  |  |
Number of shares issued and sold | 300,000 |  |  |  |  |
Common stock, shares, outstanding (in shares) |  | 20,852,640 | 20,555,348 |  |  |
Stock repurchase program, authorized amount | $ |  |  |  |  | $ 35,000,000 |
Class B Common Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Common stock, shares authorized (in shares) |  | 25,000,000 | 25,000,000 |  |  |
Common stock, shares issued (in shares) |  | 15 | 17 |  |  |
Treasury stock, shares, retired (in shares) |  | 2 | 1 | 1 |  |
Common stock, shares, outstanding (in shares) |  | 15 | 17 | 19 |  |
Malibu Boats, Inc. ownership in Malibu Boats Holdings, LLC |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Number of LLC units outstanding (in shares) |  | 20,852,640 | 20,555,348 |  |  |
Ownership percentage |  | 96.20% | 95.20% |  |  |
Non-controlling Interest in LLC |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Number of LLC units outstanding (in shares) |  | 830,152 | 1,043,186 |  |  |
Ownership percentage |  | 3.80% | 4.80% |  |  |

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