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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net sales to external customers	$ 123,483	$ 103,541
Income before provision for income taxes	15,598	6,156
Assets	384,667		$ 365,768
Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	69,230	60,860
Income before provision for income taxes	8,229	3,870
Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	48,260	36,918
Income before provision for income taxes	6,847	1,827
Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	5,993	5,763
Income before provision for income taxes	458	469
Operating Segments
Segment Reporting Information [Line Items]
Net sales to external customers	123,483	103,541
Operating Segments | Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	70,948	63,032
Assets	337,884		327,181
Operating Segments | Cobalt
Segment Reporting Information [Line Items]
Net sales to external customers	48,260	36,918
Assets	165,316		157,616
Operating Segments | Malibu Australia
Segment Reporting Information [Line Items]
Net sales to external customers	5,993	5,763
Assets	22,307		20,128
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales to external customers	(1,718)	(2,172)
Income before provision for income taxes	64	(10)
Assets	(140,840)		$ (139,157)
Intersegment Eliminations | Malibu US
Segment Reporting Information [Line Items]
Net sales to external customers	1,718	2,172
Intersegment Eliminations | Cobalt
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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