Net Loss Per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share Reconciliation [Abstract]
Net loss attributable to Genesis Energy, L.P.	$ (5,250)	$ (34,224)
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(18,684)	(18,684)
NET LOSS ATTRIBUTABLE TO COMMON UNITHOLDERS-BASIC	(23,934)	(52,908)
NET LOSS ATTRIBUTABLE TO COMMON UNITHOLDERS-DILUTED	$ (23,934)	$ (52,908)
Basic Weighted Average Outstanding Units (in units)	122,579,000	122,579,000
Dilutive Weighted Average Outstanding Units (in units)	122,579,000	122,579,000
Basic Net Loss per Common Unit (in dollars per unit)	$ (0.20)	$ (0.43)
Dilutive Net Loss per common unit (in dollars per unit)	$ (0.20)	$ (0.43)
Class A Convertible Preferred Stock Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities not included in computation of dilutive earnings (in units)	25,336,778