Net Income (Loss) Per Common Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share Reconciliation [Abstract]
Net income (loss) attributable to Genesis Energy L.P.	$ (165,067)	$ (416,678)	$ 95,999
Net income (loss) available to common unitholders	(74,736)	(74,736)	(74,467)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON UNITHOLDERS-BASIC	(239,803)	(491,414)	21,532
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON UNITHOLDERS-DILUTED	$ (239,803)	$ (491,414)	$ 21,532
Basic Weighted Average Outstanding Units (in units)	122,579	122,579	122,579
Dilutive Weighted Average Outstanding Units (in units)	122,579	122,579	122,579
Basic Net Income (Loss) per Common Unit (in dollars per unit)	$ (1.96)	$ (4.01)	$ 0.18
Dilutive Net Income (Loss) per Common Unit (in dollars per unit)	$ (1.96)	$ (4.01)	$ 0.18