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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Net Sales	$ 140,429	$ 77,149	$ 358,343	$ 206,831
Income before provision for income taxes	23,041	12,651	74,171	30,706
Malibu U.S.
Segment Reporting Information [Line Items]
Net Sales	85,681	71,658	214,622	189,673
Income before provision for income taxes	16,245	12,193	60,963	29,470
Cobalt Boats, LLC
Segment Reporting Information [Line Items]
Net Sales	49,922		126,207
Malibu Australia
Segment Reporting Information [Line Items]
Net Sales	4,826	5,491	17,514	17,158
Income before provision for income taxes	203	556	1,439	1,394
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	140,429	77,149	358,343	206,831
Operating Segments [Member] | Malibu U.S.
Segment Reporting Information [Line Items]
Net Sales	88,160	73,844	221,418	196,285
Operating Segments [Member] | Cobalt Boats, LLC
Segment Reporting Information [Line Items]
Net Sales	49,922	0	126,207	0
Income before provision for income taxes	6,720	0	11,912	0
Operating Segments [Member] | Malibu Australia
Segment Reporting Information [Line Items]
Net Sales	4,826	5,491	17,514	17,158
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(2,479)	(2,186)	(6,796)	(6,612)
Income before provision for income taxes	(127)	(98)	(143)	(158)
Intersegment Eliminations | Malibu U.S.
Segment Reporting Information [Line Items]
Net Sales	2,479	$ 2,186	6,796	$ 6,612
Intersegment Eliminations | Cobalt Boats, LLC
Segment Reporting Information [Line Items]
Net Sales	$ 0		$ 0

X

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
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-Section S99
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