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Acquisitions - Pro forma (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Pursuit
Business Acquisition [Line Items]
Net sales	$ 200	$ 176	$ 531	$ 452
Net income	22	21	53	19
Net income attributable to Malibu Boats, Inc.	$ 21	$ 20	$ 50	$ 16
Basic earnings per share (in dollars per share)	$ 1.01	$ 0.97	$ 2.42	$ 0.80
Diluted earnings per share (in dollars per share)	$ 1.01	$ 0.96	$ 2.41	$ 0.80
Cobalt Boats, LLC
Business Acquisition [Line Items]
Net sales	$ 199,918	$ 140,429	$ 489,194	$ 358,343
Net income	22,203	16,796	49,216	17,626
Net income attributable to Malibu Boats, Inc.	$ 21,099	$ 15,672	$ 46,654	$ 15,174
Basic earnings per share (in dollars per share)	$ 1.01	$ 0.76	$ 2.24	$ 0.76
Diluted earnings per share (in dollars per share)	$ 1.01	$ 0.76	$ 2.23	$ 0.76

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