Business Segment Information (Reconciliation of Segment Margin to (Loss) Income from Continuing Operations) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting [Abstract]
Total Segment Margin	$ 153,862,000	$ 161,857,000	$ 462,095,000	$ 470,470,000
Corporate general and administrative expenses	(14,878,000)	(10,801,000)	(38,389,000)	(42,160,000)
Depreciation, depletion, amortization and accretion	(69,665,000)	(70,203,000)	(208,346,000)	(228,761,000)
Interest expense	(59,940,000)	(51,312,000)	(176,938,000)	(157,895,000)
Adjustment to exclude distributable cash generated by equity investees not included in income and include equity in investees net income	(7,142,000)	(2,318,000)	(23,690,000)	(14,500,000)
Other non-cash items	2,526,000	7,712,000	(30,601,000)	16,489,000
Distribution from unrestricted subsidiaries not included in income	(17,500,000)	(44,088,000)	(52,500,000)	(48,620,000)
Cancelation of debt income	0	809,000	0	20,534,000
Loss on extinguishment of debt	0	0	(1,627,000)	(23,480,000)
Differences in timing of cash receipts for certain contractual arrangements	(657,000)	(13,052,000)	(7,402,000)	(29,180,000)
Impairment expense	0	(3,331,000)	0	(280,826,000)
Provision for leased items no longer in use	0	(696,000)	(598,000)	(624,000)
Redeemable noncontrolling interest redemption value adjustments	(7,082,000)	(4,149,000)	(17,639,000)	(12,394,000)
Income tax expense	(423,000)	(145,000)	(1,170,000)	(575,000)
NET LOSS ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(20,899,000)	(29,717,000)	(96,805,000)	(331,522,000)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unrealized (losses) gains from valuation of embedded derivatives			(30,729,000)	19,582,000
Distribution from unrestricted subsidiaries not included in income	17,500,000	44,088,000	52,500,000	48,620,000
Genesis NEJD Pipeline, LLC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cash receipts not included in income associated with principal payments of previously owned pipeline	17,500,000		52,500,000
Embedded Derivative Financial Instruments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unrealized (losses) gains from valuation of embedded derivatives	$ 1,700,000	$ 6,700,000	$ (31,000,000)	$ 17,400,000