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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net sales to external customers	$ 165,793	$ 114,373	$ 289,276	$ 217,914
Income before provision for income taxes	19,117	44,974	34,715	51,130
Assets	438,943		438,943		$ 365,768
Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	82,721	68,081	151,951	128,941
Income before provision for income taxes	10,850	40,845	19,079	44,717
Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	45,846	39,367	94,106	76,285
Income before provision for income taxes	5,417	3,369	12,264	5,193
Pursuit
Segment Reporting Information [Line Items]
Net sales to external customers	29,927	0	29,927	0
Income before provision for income taxes	2,521	0	2,521	0
Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	7,299	6,925	13,292	12,688
Income before provision for income taxes	460	766	917	1,236
Operating Segments
Segment Reporting Information [Line Items]
Net sales to external customers	165,793	114,373	289,276	217,914
Operating Segments | Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	86,760	70,226	157,707	133,258
Assets	385,568		385,568		327,181
Operating Segments | Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	45,846	39,367	94,106	76,285
Assets	147,930		147,930		157,616
Operating Segments | Pursuit
Segment Reporting Information [Line Items]
Net sales to external customers	29,927	0	29,927	0
Assets	111,594		111,594		0
Operating Segments | Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	7,299	6,925	13,292	12,688
Assets	20,969		20,969		20,128
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales to external customers	(4,039)	(2,145)	(5,756)	(4,317)
Income before provision for income taxes	(131)	(6)	(66)	(16)
Assets	(227,118)		(227,118)		$ (139,157)
Intersegment Eliminations | Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	4,039	2,145	5,756	4,317
Intersegment Eliminations | Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	0	0		0
Intersegment Eliminations | Pursuit
Segment Reporting Information [Line Items]
Net sales to external customers		0		0
Intersegment Eliminations | Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers		$ 0		$ 0

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