CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Revenues
Total revenues	$ 442,127	$ 329,611	$ 778,399	$ 543,694
Cost of sales (exclusive of depreciation and amortization shown separately below)
Total cost of sales	299,585	240,825	534,892	402,472
Selling, general and administrative expenses	75,492	48,348	134,588	83,208
Depreciation and amortization	4,727	1,378	6,476	2,341
Transaction costs	776	368	3,821	568
Change in fair value of contingent consideration	2,158	0	7,904	377
Income from operations	59,389	38,692	90,718	54,728
Other expense (income)
Interest expense - floor plan	1,048	330	1,925	1,250
Interest expense - other	3,097	1,215	4,626	2,139
Other expense (income), net	109	5	657	(89)
Total other expense, net	4,254	1,550	7,208	3,300
Income before income tax expense	55,135	37,142	83,510	51,428
Income tax expense	12,781	6,550	17,670	9,061
Net income	42,354	30,592	65,840	42,367
Less: Net income attributable to non-controlling interests	1,011	0	1,011	0
Less: Net income loss attributable to noncontrolling interest of OneWater Marine Holdings LLC	5,046	10,117	8,513	14,104
Net income attributable to OneWater Marine Inc	36,297	20,475	56,316	28,263
New Boat [Member]
Revenues
Total revenues	290,020	239,654	526,218	391,482
Cost of sales (exclusive of depreciation and amortization shown separately below)
Total cost of sales	208,606	187,147	384,502	309,679
Pre-Owned Boat [Member]
Revenues
Total revenues	75,854	56,082	129,303	94,662
Cost of sales (exclusive of depreciation and amortization shown separately below)
Total cost of sales	55,959	42,548	95,329	73,000
Finance & Insurance [Member]
Revenues
Total revenues	14,948	11,789	24,255	17,752
Service, Parts & Other [Member]
Revenues
Total revenues	61,305	22,086	98,623	39,798
Cost of sales (exclusive of depreciation and amortization shown separately below)
Total cost of sales	$ 35,020	$ 11,130	$ 55,061	$ 19,793
Class A Common Stock [Member]
Other expense (income)
Earnings per share, Basic (in dollars per share)	$ 2.62	$ 1.88	$ 4.14	$ 2.61
Earnings per share, Diluted (in dollars per share)	$ 2.54	$ 1.83	$ 4.02	$ 2.55
Basic weighted-average shares outstanding (in shares)	13,864	10,901	13,619	10,838
Diluted weighted-average shares outstanding (in shares)	14,272	11,171	14,017	11,083