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Net Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Basic:
Net income (loss) attributable to Malibu Boats, Inc.	$ 14,257	$ (6,383)	$ 25,555	$ (498)
Shares used in computing basic net income per share:
Basic weighted-average shares outstanding (in shares)	20,875,243	20,429,627	20,758,095	19,804,192
Basic net income per share (in dollars per share)	$ 0.68	$ (0.31)	$ 1.23	$ (0.03)
Diluted:
Net income (loss) attributable to Malibu Boats, Inc.	$ 14,257	$ (6,383)	$ 25,555	$ (498)
Shares used in computing diluted net income per share:
Basic weighted-average shares outstanding (in shares)	20,875,243	20,429,627	20,758,095	19,804,192
Diluted weighted-average shares outstanding (in shares)	20,990,313	20,429,627	20,883,868	19,804,192
Diluted net income per share (in dollars per share)	$ 0.68	$ (0.31)	$ 1.22	$ (0.03)
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	904,652	1,274,484	924,652	1,274,484
Class A Common Stock
Shares used in computing basic net income per share:
Basic weighted-average shares outstanding (in shares)	20,689,779	20,263,999	20,577,182	19,644,918
Shares used in computing diluted net income per share:
Basic weighted-average shares outstanding (in shares)	20,689,779	20,263,999	20,577,182	19,644,918
Restricted Stock
Shares used in computing diluted net income per share:
Restricted stock units granted to employees (in shares)	94,654	0	117,374	0
Employee Stock Option
Shares used in computing diluted net income per share:
Restricted stock units granted to employees (in shares)	20,416	0	8,399
Fully Vested/Participating | Restricted Stock
Shares used in computing basic net income per share:
Basic weighted-average shares outstanding (in shares)	185,464	165,628	180,913	159,274
Shares used in computing diluted net income per share:
Basic weighted-average shares outstanding (in shares)	185,464	165,628	180,913	159,274

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