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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net sales to external customers	$ 199,918	$ 140,429	$ 489,194	$ 358,343
Income before provision for income taxes	29,524	23,041	64,239	74,171
Assets	456,432		456,432		$ 365,768
Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	101,600	85,681	253,551	214,622
Income before provision for income taxes	19,776	16,245	38,855	60,963
Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	56,041	49,922	150,147	126,207
Income before provision for income taxes	7,202	6,720	19,466	11,912
Pursuit
Segment Reporting Information [Line Items]
Net sales to external customers	36,458	0	66,385	0
Income before provision for income taxes	2,568	0	5,089	0
Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	5,819	4,826	19,111	17,514
Income before provision for income taxes	305	203	1,222	1,439
Operating Segments
Segment Reporting Information [Line Items]
Net sales to external customers	199,918	140,429	489,194	358,343
Operating Segments | Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	106,803	88,160	264,510	221,418
Assets	377,034		377,034		327,181
Operating Segments | Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	56,041	49,922	150,147	126,207
Assets	153,413		153,413		157,616
Operating Segments | Pursuit
Segment Reporting Information [Line Items]
Net sales to external customers	36,458	0	66,385	0
Assets	112,228		112,228		0
Operating Segments | Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	5,819	4,826	19,111	17,514
Assets	24,072		24,072		20,128
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales to external customers	(5,203)	(2,479)	(10,959)	(6,796)
Income before provision for income taxes	(327)	(127)	(393)	(143)
Assets	(210,315)		(210,315)		$ (139,157)
Intersegment Eliminations | Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	5,203	2,479	10,959	6,796
Intersegment Eliminations | Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	0	0	0	0
Intersegment Eliminations | Pursuit
Segment Reporting Information [Line Items]
Net sales to external customers	0	0	0	0
Intersegment Eliminations | Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	$ 0	$ 0	$ 0	$ 0

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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