Stockholder's Equity (Details)	Feb. 11, 2020 Vote $ / shares shares	Apr. 03, 2019 $ / shares shares	Dec. 31, 2019 $ / shares shares	Sep. 30, 2019 $ / shares shares
Stockholders' Equity [Abstract]
Common stock, shares authorized (in shares)			1,000	1,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Common stock, shares issued (in shares)			1,000	1,000
Common stock, shares outstanding (in shares)			1,000	1,000
OneWater LLC [Member]
Stockholders' Equity [Abstract]
Number of shares issued (in shares)		1,000
Offering price of shares (in dollars per share) | $ / shares		$ 10.00
OneWater LLC [Member] | Subsequent Event [Member]
Stockholders' Equity [Abstract]
Common stock, shares outstanding (in shares)	8,500,000
Common stock, conversion basis	one-for-one
Preferred Stock [Member] | Subsequent Event [Member]
Stockholders' Equity [Abstract]
Preferred stock, shares authorized (in shares)	1,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01
Common Class A [Member] | Subsequent Event [Member]
Stockholders' Equity [Abstract]
Common stock, shares authorized (in shares)	40,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01
Voting rights issued for each share of common stock | Vote	1
Common Class B [Member] | Subsequent Event [Member]
Stockholders' Equity [Abstract]
Common stock, shares authorized (in shares)	10,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01
Common stock, shares outstanding (in shares)	8,500,000
Voting rights issued for each share of common stock | Vote	1