CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues
Revenues	$ 568,900	$ 404,207	$ 1,347,299	$ 947,901
Cost of sales (exclusive of depreciation and amortization shown separately below)
Cost of sales	384,961	277,255	919,853	679,727
Selling, general and administrative expenses	87,867	60,476	222,455	143,685
Depreciation and amortization	4,073	1,475	10,549	3,816
Transaction costs	1,337	65	5,158	633
Change in fair value of contingent consideration	3,118	0	11,022	377
Income from operations	87,544	64,936	178,262	119,663
Other expense (income)
Interest expense - floor plan	1,131	956	3,056	2,206
Interest expense - other	3,311	1,083	7,937	3,222
Other (income) expense, net	(166)	(158)	491	(247)
Total other expense, net	4,276	1,881	11,484	5,181
Income before income tax expense	83,268	63,055	166,778	114,482
Income tax expense	18,785	11,498	36,455	20,559
Net income	64,483	51,557	130,323	93,923
Less: Net income attributable to non-controlling interests	(959)	0	(1,970)	0
Less: Net income attributable to non-controlling interests of One Water Marine Holdings, LLC	(7,547)	(17,054)	(16,060)	(31,158)
Net income attributable to OneWater Marine Inc.	55,977	34,503	112,293	62,765
New Boat [Member]
Revenues
Revenues	376,886	288,222	903,104	679,704
Cost of sales (exclusive of depreciation and amortization shown separately below)
Cost of sales	274,544	211,141	659,046	520,820
Pre-Owned Boat [Member]
Revenues
Revenues	98,181	71,116	227,484	165,778
Cost of sales (exclusive of depreciation and amortization shown separately below)
Cost of sales	68,749	52,566	164,078	125,566
Finance & Insurance [Member]
Revenues
Revenues	18,979	15,238	43,234	32,990
Service, Parts & Other [Member]
Revenues
Revenues	74,854	29,631	173,477	69,429
Cost of sales (exclusive of depreciation and amortization shown separately below)
Cost of sales	$ 41,668	$ 13,548	$ 96,729	$ 33,341
Class A Common Stock [Member]
Other expense (income)
Earnings per share, Basic (in dollars per share)	$ 3.96	$ 3.14	$ 8.14	$ 5.77
Earnings per share, Diluted (in dollars per share)	$ 3.86	$ 3.04	$ 7.90	$ 5.63
Basic weighted-average shares outstanding (in shares)	14,133	10,976	13,791	10,884
Diluted weighted-average shares outstanding (in shares)	14,512	11,341	14,205	11,143