Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
REVENUES:
Total revenues	$ 634,785	$ 752,388	$ 1,254,794	$ 1,478,196
COSTS AND EXPENSES:
General and administrative	13,412	13,529	25,098	25,203
Depreciation, depletion and amortization	79,353	77,680	156,991	152,935
Total costs and expenses	547,837	691,488	1,105,817	1,358,215
OPERATING INCOME	86,948	60,900	148,977	119,981
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity investees	15,046	8,324	28,043	18,896
Interest (expense) income, net	(55,507)	(57,909)	(111,208)	(114,045)
Other expense	(4,692)	(188)	(7,668)	(5,432)
Income before income taxes	41,795	11,127	58,144	19,400
Income tax expense	(143)	(256)	(545)	(631)
NET INCOME	41,652	10,871	57,599	18,769
Net income attributable to noncontrolling interest	(1,532)	126	(1,525)	262
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	40,120	10,997	56,074	19,031
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(18,684)	(17,257)	(37,099)	(34,145)
Net Income (Loss) Available to Common Stockholders, Basic	21,436	(6,260)	18,975	(15,114)
Offshore pipeline transportation
REVENUES:
Total revenues	78,427	69,969	156,744	143,229
COSTS AND EXPENSES:
Cost of products and services sold	4,117	17,440	22,575	35,780
Sodium minerals and sulfur services
REVENUES:
Total revenues	274,606	298,881	550,092	584,791
COSTS AND EXPENSES:
Cost of products and services sold	219,894	232,517	438,602	456,015
Marine Transportation
REVENUES:
Total revenues	58,706	56,185	115,356	105,114
COSTS AND EXPENSES:
Cost of products and services sold	44,836	44,217	88,569	82,064
Onshore facilities and transportation
REVENUES:
Total revenues	223,046	327,353	432,602	645,062
COSTS AND EXPENSES:
Cost of products and services sold	186,225	306,105	373,982	606,218
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer)
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
General and administrative	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Total costs and expenses	0	0	0	0
OPERATING INCOME	0	0	0	0
Equity in earnings of subsidiaries	101,107	69,433	176,394	139,025
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	(56,295)	(58,248)	(112,652)	(114,562)
Other expense	(4,692)	(188)	(7,668)	(5,432)
Income before income taxes	40,120	10,997	56,074	19,031
Income tax expense	0	0	0	0
NET INCOME	40,120	10,997	56,074	19,031
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	40,120	10,997	56,074	19,031
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(18,684)	(17,257)	(37,099)	(34,145)
Net Income (Loss) Available to Common Stockholders, Basic	21,436	(6,260)	18,975	(15,114)
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer) \| Offshore pipeline transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
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
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer) \| Marine Transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
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
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer)
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
General and administrative	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Total costs and expenses	0	0	0	0
OPERATING INCOME	0	0	0	0
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	0	0	0	0
Other expense	0	0	0	0
Income before income taxes	0	0	0	0
Income tax expense	0	0	0	0
NET INCOME	0	0	0	0
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME 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 Stockholders, Basic	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Offshore pipeline transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Sodium minerals and sulfur services
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Marine Transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Genesis Energy Finance Corporation (Co-Issuer) \| Onshore facilities and transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Guarantor Subsidiaries
REVENUES:
Total revenues	629,651	746,552	1,244,601	1,466,712
COSTS AND EXPENSES:
General and administrative	13,412	13,529	25,098	25,203
Depreciation, depletion and amortization	78,728	77,055	155,741	151,685
Total costs and expenses	553,426	689,459	1,109,894	1,354,360
OPERATING INCOME	76,225	57,093	134,707	112,352
Equity in earnings of subsidiaries	6,094	897	6,511	1,529
Equity in earnings of equity investees	15,046	8,324	28,043	18,896
Interest (expense) income, net	3,911	3,660	7,742	7,204
Other expense	0	0	0	0
Income before income taxes	101,276	69,974	177,003	139,981
Income tax expense	(135)	(478)	(537)	(855)
NET INCOME	101,141	69,496	176,466	139,126
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	101,141	69,496	176,466	139,126
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Stockholders, Basic	101,141	69,496	176,466	139,126
Reportable Legal Entities \| Guarantor Subsidiaries \| Offshore pipeline transportation
REVENUES:
Total revenues	78,427	69,969	156,744	143,229
COSTS AND EXPENSES:
Cost of products and services sold	11,780	16,809	30,201	34,471
Reportable Legal Entities \| Guarantor Subsidiaries \| Sodium minerals and sulfur services
REVENUES:
Total revenues	273,833	297,929	549,010	583,026
COSTS AND EXPENSES:
Cost of products and services sold	218,761	232,021	436,979	455,268
Reportable Legal Entities \| Guarantor Subsidiaries \| Marine Transportation
REVENUES:
Total revenues	58,706	56,185	115,356	105,114
COSTS AND EXPENSES:
Cost of products and services sold	44,836	44,217	88,569	82,064
Reportable Legal Entities \| Guarantor Subsidiaries \| Onshore facilities and transportation
REVENUES:
Total revenues	218,685	322,469	423,491	635,343
COSTS AND EXPENSES:
Cost of products and services sold	185,909	305,828	373,306	605,669
Reportable Legal Entities \| Non-Guarantor Subsidiaries
REVENUES:
Total revenues	6,462	7,952	13,321	15,853
COSTS AND EXPENSES:
General and administrative	0	0	0	0
Depreciation, depletion and amortization	625	625	1,250	1,250
Total costs and expenses	(4,261)	4,145	(949)	8,224
OPERATING INCOME	10,723	3,807	14,270	7,629
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	(3,123)	(3,321)	(6,298)	(6,687)
Other expense	0	0	0	0
Income before income taxes	7,600	486	7,972	942
Income tax expense	(8)	222	(8)	224
NET INCOME	7,592	708	7,964	1,166
Net income attributable to noncontrolling interest	(1,532)	126	(1,525)	262
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	6,060	834	6,439	1,428
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Stockholders, Basic	6,060	834	6,439	1,428
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Offshore pipeline transportation
REVENUES:
Total revenues	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	(7,663)	631	(7,626)	1,309
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Sodium minerals and sulfur services
REVENUES:
Total revenues	2,101	3,068	4,210	6,134
COSTS AND EXPENSES:
Cost of products and services sold	2,461	2,612	4,751	5,116
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Marine Transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Reportable Legal Entities \| Non-Guarantor Subsidiaries \| Onshore facilities and transportation
REVENUES:
Total revenues	4,361	4,884	9,111	9,719
COSTS AND EXPENSES:
Cost of products and services sold	316	277	676	549
Eliminations
REVENUES:
Total revenues	(1,328)	(2,116)	(3,128)	(4,369)
COSTS AND EXPENSES:
General and administrative	0	0	0	0
Depreciation, depletion and amortization	0	0	0	0
Total costs and expenses	(1,328)	(2,116)	(3,128)	(4,369)
OPERATING INCOME	0	0	0	0
Equity in earnings of subsidiaries	(107,201)	(70,330)	(182,905)	(140,554)
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	0	0	0	0
Other expense	0	0	0	0
Income before income taxes	(107,201)	(70,330)	(182,905)	(140,554)
Income tax expense	0	0	0	0
NET INCOME	(107,201)	(70,330)	(182,905)	(140,554)
Net income attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(107,201)	(70,330)	(182,905)	(140,554)
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0	0	0
Net Income (Loss) Available to Common Stockholders, Basic	(107,201)	(70,330)	(182,905)	(140,554)
Eliminations \| Offshore pipeline transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Eliminations \| Sodium minerals and sulfur services
REVENUES:
Total revenues	(1,328)	(2,116)	(3,128)	(4,369)
COSTS AND EXPENSES:
Cost of products and services sold	(1,328)	(2,116)	(3,128)	(4,369)
Eliminations \| Marine Transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0	0	0
Eliminations \| Onshore facilities and transportation
REVENUES:
Total revenues	0	0	0	0
COSTS AND EXPENSES:
Cost of products and services sold	$ 0	$ 0	$ 0	$ 0

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