Segment Reporting (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) Segment	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments										3	3	4
Net sales	$ 118,661	$ 182,310	$ 180,112	$ 172,080	$ 194,822	$ 199,918	$ 165,793	$ 123,483	$ 653,163			$ 684,016	$ 497,002
Depreciation and amortization									18,380			15,960	12,854
Net income before provision for income taxes									83,732			91,797	89,387
Capital expenditures									41,291			17,938	10,449
Long-lived assets	285,475				263,221				285,475	$ 285,475	$ 285,475	263,221	167,296
Total assets	477,346				451,314				477,346	477,346	$ 477,346	451,314	365,768
Malibu U.S., and Malibu Australia
Segment Reporting Information [Line Items]
Number of reportable segments | segment											1
Malibu
Segment Reporting Information [Line Items]
Net sales									354,769			374,611
Cobalt
Segment Reporting Information [Line Items]
Net sales									174,768			206,598
Pursuit
Segment Reporting Information [Line Items]
Net sales									123,626			102,807
Operating Segments | Malibu
Segment Reporting Information [Line Items]
Net sales									354,769			374,611	316,687
Depreciation and amortization									8,809			7,674	7,468
Net income before provision for income taxes									55,567			54,160	69,670
Capital expenditures									10,260			9,153	9,279
Long-lived assets	49,771				49,207				49,771	49,771	$ 49,771	49,207	48,784
Total assets	194,502				185,154				194,502	194,502	194,502	185,154	208,152
Operating Segments | Cobalt
Segment Reporting Information [Line Items]
Net sales									174,768			206,598	180,315
Depreciation and amortization									5,258			5,252	5,386
Net income before provision for income taxes									17,275			28,691	19,717
Capital expenditures									8,850			4,404	1,170
Long-lived assets	121,508				117,702				121,508	121,508	121,508	117,702	118,512
Total assets	153,820				151,481				153,820	153,820	153,820	151,481	157,616
Operating Segments | Pursuit
Segment Reporting Information [Line Items]
Net sales									123,626			102,807	0
Depreciation and amortization									4,313			3,034	0
Net income before provision for income taxes									10,890			8,946	0
Capital expenditures									22,181			4,381	0
Long-lived assets	114,196				96,312				114,196	114,196	114,196	96,312	0
Total assets	$ 129,024				$ 114,679				$ 129,024	$ 129,024	$ 129,024	$ 114,679	$ 0