Net Earnings Per Share (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
Basic:
Net income attributable to Malibu Boats, Inc.	$ 15,672	$ 8,013	$ 15,174	$ 18,694
Basic weighted-average shares outstanding	20,544,488	17,877,152	20,050,958	17,799,221
Basic net income (loss) per share (in dollars per share)	$ 0.76	$ 0.45	$ 0.76	$ 1.05
Diluted:
Net income attributable to Malibu Boats, Inc.	$ 15,672	$ 8,013	$ 15,174	$ 18,694
Shares used in computing basic net income per share:	20,544,488	17,877,152	20,050,958	17,799,221
Weighted average shares outstanding used in computing net income per share, Diluted (in shares)	20,657,010	17,962,286	20,135,064	17,887,266
Diluted net income (loss) per share (in dollars per share)	$ 0.76	$ 0.45	$ 0.76	$ 1.05
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	1,238,727		1,233,227	1,293,447
Class A Common Stock
Basic:
Basic weighted-average shares outstanding	20,371,072	17,727,956	19,886,970	17,665,672
Diluted:
Shares used in computing basic net income per share:	20,371,072	17,727,956	19,886,970	17,665,672
Restricted Stock Units (RSUs)
Diluted:
Weighted-average restricted shares. adjustments	112,522	85,134	84,106	88,045
Fully Vested/Participating | Restricted Stock Units (RSUs)
Basic:
Basic weighted-average shares outstanding	173,416	149,196	163,988	133,549
Diluted:
Shares used in computing basic net income per share:	173,416	149,196	163,988	133,549