CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 152,611	$ 116,413	$ 48,508
Other comprehensive loss:
Foreign currency translation adjustment	(8)	0	0
Comprehensive income	152,603	116,413	48,508
Less: Net income attributable to non-controlling interests	(2,998)	0	(350)
Less: Net income attributable to non-controlling interests of One Water Marine Holdings, LLC	(18,669)	(37,354)	(30,733)
Foreign currency translation adjustment attributable to non-controlling interest of One Water Marine Holdings, LLC	1	0	0
Comprehensive income attributable to One Water Marine Holdings, Inc.	$ 130,937	$ 79,059	$ 17,425