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Acquisition Pro forma (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Net sales	$ 140,429	$ 77,149	$ 358,343	$ 206,831
Net income	16,796	8,846	17,626	20,809
Net income attributable to Malibu Boats, Inc.	$ 15,672	$ 8,013	$ 15,174	$ 18,694
Basic (in dollars per share)	$ 0.76	$ 0.45	$ 0.76	$ 1.05
Diluted (in dollars per share)	$ 0.76	$ 0.45	$ 0.76	$ 1.05
Cobalt Boats, LLC | Pro Forma [Member]
Business Acquisition [Line Items]
Net sales	$ 140,429	$ 119,666	$ 358,343	$ 309,973
Net income	16,103	10,105	17,307	22,577
Net income attributable to Malibu Boats, Inc.	$ 15,027	$ 9,137	$ 14,879	$ 20,230
Basic (in dollars per share)	$ 0.73	$ 0.45	$ 0.74	$ 1.02
Diluted (in dollars per share)	$ 0.73	$ 0.45	$ 0.74	$ 1.02

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