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Acquisitions - Pro forma (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Pursuit |  |  |
Business Acquisition [Line Items] |  |  |
Net sales | $ 725,658 | $ 620,908 |
Net income | 73,672 | 33,618 |
Net income attributable to Malibu Boats, Inc. | $ 69,830 | $ 29,871 |
Basic earnings per share (in dollars per share) | $ 3.35 | $ 1.48 |
Diluted earnings per share (in dollars per share) | $ 3.33 | $ 1.47 |
Cobalt |  |  |
Business Acquisition [Line Items] |  |  |
Net sales | $ 684,016 | $ 497,002 | $ 423,830
Net income | 69,701 | 30,696 | 33,655
Net income attributable to Malibu Boats, Inc. | $ 66,066 | $ 27,361 | $ 30,439
Basic earnings per share (in dollars per share) | $ 3.17 | $ 1.36 | $ 1.53
Diluted earnings per share (in dollars per share) | $ 3.15 | $ 1.35 | $ 1.52

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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