Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 745,278	$ 486,114	$ 2,223,474	$ 1,308,328
General and administrative	24,209	19,409	49,412	38,723
Depreciation, depletion and amortization	91,876	63,732	244,811	176,453
Gain on sale of assets	(3,363)	0	(3,363)	(26,684)
Total costs and expenses	699,130	443,014	2,057,345	1,151,184
OPERATING INCOME	46,148	43,100	166,129	157,144
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	9,492	13,044	28,388	34,805
Interest expense	(58,819)	(47,388)	(172,864)	(122,117)
Other expense	1,828	(2,276)	(3,604)	(2,276)
Income (loss) before income taxes	(1,351)	6,480	18,049	67,556
Income tax (expense) benefit	(283)	(320)	(914)	(878)
NET INCOME (LOSS)	(1,634)	6,160	17,135	66,678
Net loss attributable to noncontrolling interest	1,311	152	1,573	457
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(323)	6,312	18,708	67,135
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(17,635)	(5,469)	(51,780)	(5,469)
Net Income (Loss) Available to Common Unitholders	(17,958)	843	(33,072)	61,666
Offshore pipeline transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	70,115	80,671	213,344	243,437
Cost of products and services sold	17,753	18,690	53,533	54,682
Sodium minerals and sulfur services
Condensed Financial Statements, Captions [Line Items]
Total revenues	291,722	109,765	876,513	197,879
Cost of products and services sold	229,204	79,365	685,219	133,335
Marine transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	56,296	48,534	161,410	152,038
Cost of products and services sold	44,195	35,789	126,259	111,980
Onshore facilities and transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	327,145	247,144	972,207	714,974
Cost of products and services sold	295,256	226,029	901,474	662,695
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
General and administrative	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Gain on sale of assets	0	0	0	0
Total costs and expenses	0	0	0	0
OPERATING INCOME	0	0	0	0
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	0	0	0	0
Interest expense	0	0	0	0
Other expense	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Income tax (expense) benefit	0	0	0	0
NET INCOME (LOSS)	0	0	0	0
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	0	0	0	0
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Unitholders	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Offshore pipeline transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Sodium minerals and sulfur services
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Marine transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Onshore facilities and transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
General and administrative	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Gain on sale of assets	0	0	0	0
Total costs and expenses	0	0	0	0
OPERATING INCOME	0	0	0	0
Equity in earnings of equity investees	57,078	55,971	196,103	191,471
Interest (expense) income, net	0	0	0	0
Interest expense	(59,229)	(47,383)	(173,791)	(122,060)
Other expense	1,828	(2,276)	(3,604)	(2,276)
Income (loss) before income taxes	(323)	6,312	18,708	67,135
Income tax (expense) benefit	0	0	0	0
NET INCOME (LOSS)	(323)	6,312	18,708	67,135
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(323)	6,312	18,708	67,135
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(17,635)	(5,469)	(51,780)	(5,469)
Net Income (Loss) Available to Common Unitholders	(17,958)	843	(33,072)	61,666
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer) \| Offshore pipeline transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer) \| Sodium minerals and sulfur services
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer) \| Marine transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer) \| Onshore facilities and transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues	739,523	481,044	2,206,235	1,293,704
General and administrative	24,209	19,409	49,412	38,723
Depreciation, depletion and amortization	85,229	63,107	236,914	174,578
Gain on sale of assets	(3,363)	0	(3,363)	(26,684)
Total costs and expenses	691,177	440,818	2,045,537	1,145,443
OPERATING INCOME	48,346	40,226	160,698	148,261
Equity in earnings of equity investees	(4,047)	(388)	(2,518)	(1,033)
Interest (expense) income, net	9,492	13,044	28,388	34,805
Interest expense	3,683	3,450	10,887	10,436
Other expense	0	0	0	0
Income (loss) before income taxes	57,474	56,332	197,455	192,469
Income tax (expense) benefit	(383)	(322)	(1,238)	(880)
NET INCOME (LOSS)	57,091	56,010	196,217	191,589
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	57,091	56,010	196,217	191,589
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Unitholders	57,091	56,010	196,217	191,589
Reportable Legal Entities \| Guarantor Subsidiaries \| Offshore pipeline transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	70,115	80,671	213,344	243,437
Cost of products and services sold	17,217	17,928	51,688	52,396
Reportable Legal Entities \| Guarantor Subsidiaries \| Sodium minerals and sulfur services
Condensed Financial Statements, Captions [Line Items]
Total revenues	290,837	109,292	873,863	197,321
Cost of products and services sold	228,721	78,869	683,989	132,608
Reportable Legal Entities \| Guarantor Subsidiaries \| Marine transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	56,296	48,534	161,410	152,038
Cost of products and services sold	44,195	35,789	126,259	111,980
Reportable Legal Entities \| Guarantor Subsidiaries \| Onshore facilities and transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	322,275	242,547	957,618	700,908
Cost of products and services sold	294,969	225,716	900,638	661,842
Reportable Legal Entities \| Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues	7,792	6,666	23,645	20,034
General and administrative	0	0	0	0
Depreciation, depletion and amortization	6,647	625	7,897	1,875
Gain on sale of assets	0	0	0	0
Total costs and expenses	9,990	3,792	18,214	11,151
OPERATING INCOME	(2,198)	2,874	5,431	8,883
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	0	0	0	0
Interest expense	(3,273)	(3,455)	(9,960)	(10,493)
Other expense	0	0	0	0
Income (loss) before income taxes	(5,471)	(581)	(4,529)	(1,610)
Income tax (expense) benefit	100	2	324	2
NET INCOME (LOSS)	(5,371)	(579)	(4,205)	(1,608)
Net loss attributable to noncontrolling interest	1,311	152	1,573	457
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(4,060)	(427)	(2,632)	(1,151)
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Unitholders	(4,060)	(427)	(2,632)	(1,151)
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Offshore pipeline transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0		0
Cost of products and services sold	536	762	1,845	2,286
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Sodium minerals and sulfur services
Condensed Financial Statements, Captions [Line Items]
Total revenues	2,922	2,069	9,056	5,968
Cost of products and services sold	2,520	2,092	7,636	6,137
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Marine transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Onshore facilities and transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	4,870	4,597	14,589	14,066
Cost of products and services sold	287	313	836	853
Eliminations
Condensed Financial Statements, Captions [Line Items]
Total revenues	(2,037)	(1,596)	(6,406)	(5,410)
General and administrative	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Gain on sale of assets	0	0	0	0
Total costs and expenses	(2,037)	(1,596)	(6,406)	(5,410)
OPERATING INCOME	0	0	0	0
Equity in earnings of equity investees	(53,031)	(55,583)	(193,585)	(190,438)
Interest (expense) income, net	0	0	0	0
Interest expense	0	0	0	0
Other expense	0	0	0	0
Income (loss) before income taxes	(53,031)	(55,583)	(193,585)	(190,438)
Income tax (expense) benefit	0	0	0	0
NET INCOME (LOSS)	(53,031)	(55,583)	(193,585)	(190,438)
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(53,031)	(55,583)	(193,585)	(190,438)
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Unitholders	(53,031)	(55,583)	(193,585)	(190,438)
Eliminations \| Offshore pipeline transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Eliminations \| Sodium minerals and sulfur services
Condensed Financial Statements, Captions [Line Items]
Total revenues	(2,037)	(1,596)	(6,406)	(5,410)
Cost of products and services sold	(2,037)	(1,596)	(6,406)	(5,410)
Eliminations \| Marine transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	0	0	0	0
Eliminations \| Onshore facilities and transportation
Condensed Financial Statements, Captions [Line Items]
Total revenues	0	0	0	0
Cost of products and services sold	$ 0	$ 0	$ 0	$ 0

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Earnings of wholly-owned subsidiaries that are eliminated in consolidation.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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