Business Segment Information (Reconciliation of Segment Margin to (Loss) Income from Continuing Operations) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting [Abstract]
Total Segment Margin	$ 156,097,000	$ 169,288,000
Corporate general and administrative expenses	(11,152,000)	(6,492,000)
Depreciation, depletion, amortization and accretion	(68,997,000)	(75,978,000)
Interest expense	(57,829,000)	(54,965,000)
Adjustment to exclude distributable cash generated by equity investees not included in income and include equity in investees net income (1)	(8,856,000)	(6,406,000)
Other non-cash items (2)	(18,444,000)	33,261,000
Distribution from unrestricted subsidiaries not included in income (3)	(17,500,000)	(2,238,000)
Loss on extinguishment of debt (4)	(1,627,000)	(23,480,000)
Differences in timing of cash receipts for certain contractual arrangements	(299,000)	(4,490,000)
Provision for leased items no longer in use	(604,000)	130,000
Redeemable noncontrolling interest redemption value adjustments	(4,791,000)	(4,086,000)
Income tax (expense) benefit	(222,000)	365,000
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(34,224,000)	24,909,000
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unrealized (loss) gain from valuation of embedded derivatives	(17,599,000)	31,118,000
Genesis NEJD Pipeline, LLC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Collections received from direct finance lease receivable	17,500,000	2,200,000
Embedded Derivative Financial Instruments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unrealized (loss) gain from valuation of embedded derivatives	$ (18,400,000)	$ 32,500,000