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Segment Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
Segment Information (Details) $ in Thousands	Jun. 30, 2019 USD ($) segment	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Net sales		$ 182,310	$ 199,918	$ 534,502	$ 489,194
Income before provision for income taxes		30,853	29,524	75,018	64,239
Assets	$ 451,314	598,664		$ 598,664
Malibu U.S., Malibu Australia, Cobalt and Pursuit
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	4
Malibu U.S. And Malibu Australia
Segment Reporting Information [Line Items]
Number of reportable segments \| segment				1
Malibu, Cobalt And Pursuit
Segment Reporting Information [Line Items]
Number of reportable segments \| segment				3
Malibu
Segment Reporting Information [Line Items]
Net sales		102,604	107,419	$ 285,811	272,662
Cobalt
Segment Reporting Information [Line Items]
Net sales		46,028	56,041	145,173	150,147
Pursuit
Segment Reporting Information [Line Items]
Net sales		33,678	36,458	103,518	66,385
Operating Segments \| Malibu
Segment Reporting Information [Line Items]
Net sales		102,604	107,419	285,811	272,662
Income before provision for income taxes		21,669	19,754	48,331	39,684
Assets	$ 185,154	311,541		311,541
Operating Segments \| Cobalt
Segment Reporting Information [Line Items]
Net sales		46,028	56,041	145,173	150,147
Income before provision for income taxes		6,178	7,202	16,937	19,466
Assets	151,481	157,988		157,988
Operating Segments \| Pursuit
Segment Reporting Information [Line Items]
Net sales		33,678	36,458	103,518	66,385
Income before provision for income taxes		3,006	$ 2,568	9,750	$ 5,089
Assets	$ 114,679	$ 129,135		$ 129,135