Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
REVENUES:
Total revenues	$ 620,009	$ 725,808
COSTS AND EXPENSES:
General and administrative	11,686	11,674
Depreciation, depletion and amortization	77,638	75,255
Total costs and expenses	557,980	666,727
OPERATING INCOME	62,029	59,081
Equity in earnings of subsidiaries	0	0
Equity in earnings of equity investees	12,997	10,572
Interest (expense) income, net	(55,701)	(56,136)
Other expense	(2,976)	(5,244)
Income before income taxes	16,349	8,273
Income tax expense	(402)	(375)
NET INCOME	15,947	7,898
Net loss attributable to noncontrolling interest	7	136
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	15,954	8,034
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(18,415)	(16,888)
Net Loss Available to Common Unitholders	(2,461)	(8,854)
Offshore pipeline transportation
REVENUES:
Total revenues	78,317	73,260
COSTS AND EXPENSES:
Cost of products and services sold	18,458	18,340
Sodium minerals and sulfur services
REVENUES:
Total revenues	275,486	285,910
COSTS AND EXPENSES:
Cost of products and services sold	218,708	223,498
Marine Transportation
REVENUES:
Total revenues	56,650	48,929
COSTS AND EXPENSES:
Cost of products and services sold	43,733	37,847
Onshore facilities and transportation
REVENUES:
Total revenues	209,556	317,709
COSTS AND EXPENSES:
Cost of products and services sold	187,757	300,113
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
General and administrative	0	0
Depreciation, depletion and amortization	0	0
Total costs and expenses	0	0
OPERATING INCOME	0	0
Equity in earnings of subsidiaries	75,287	69,592
Equity in earnings of equity investees	0	0
Interest (expense) income, net	(56,357)	(56,314)
Other expense	(2,976)	(5,244)
Income before income taxes	15,954	8,034
Income tax expense	0	0
NET INCOME	15,954	8,034
Net loss attributable to noncontrolling interest	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	15,954	8,034
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	(18,415)	(16,888)
Net Loss Available to Common Unitholders	(2,461)	(8,854)
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer) | Offshore pipeline transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer) | Sodium minerals and sulfur services
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer) | Marine Transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer) | Onshore facilities and transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer)
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
General and administrative	0	0
Depreciation, depletion and amortization	0	0
Total costs and expenses	0	0
OPERATING INCOME	0	0
Equity in earnings of subsidiaries	0	0
Equity in earnings of equity investees	0	0
Interest (expense) income, net	0	0
Other expense	0	0
Income before income taxes	0	0
Income tax expense	0	0
NET INCOME	0	0
Net loss attributable to noncontrolling interest	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	0	0
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0
Net Loss Available to Common Unitholders	0	0
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer) | Offshore pipeline transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer) | Sodium minerals and sulfur services
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer) | Marine Transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer) | Onshore facilities and transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Guarantor Subsidiaries
REVENUES:
Total revenues	614,950	720,160
COSTS AND EXPENSES:
General and administrative	11,686	11,674
Depreciation, depletion and amortization	77,013	74,630
Total costs and expenses	556,468	664,901
OPERATING INCOME	58,482	55,259
Equity in earnings of subsidiaries	417	632
Equity in earnings of equity investees	12,997	10,572
Interest (expense) income, net	3,831	3,544
Other expense	0	0
Income before income taxes	75,727	70,007
Income tax expense	(402)	(377)
NET INCOME	75,325	69,630
Net loss attributable to noncontrolling interest	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	75,325	69,630
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0
Net Loss Available to Common Unitholders	75,325	69,630
Reportable Legal Entities | Guarantor Subsidiaries | Offshore pipeline transportation
REVENUES:
Total revenues	78,317	73,260
COSTS AND EXPENSES:
Cost of products and services sold	18,421	17,662
Reportable Legal Entities | Guarantor Subsidiaries | Sodium minerals and sulfur services
REVENUES:
Total revenues	275,177	285,097
COSTS AND EXPENSES:
Cost of products and services sold	218,218	223,247
Reportable Legal Entities | Guarantor Subsidiaries | Marine Transportation
REVENUES:
Total revenues	56,650	48,929
COSTS AND EXPENSES:
Cost of products and services sold	43,733	37,847
Reportable Legal Entities | Guarantor Subsidiaries | Onshore facilities and transportation
REVENUES:
Total revenues	204,806	312,874
COSTS AND EXPENSES:
Cost of products and services sold	187,397	299,841
Reportable Legal Entities | Non-Guarantor Subsidiaries
REVENUES:
Total revenues	6,859	7,901
COSTS AND EXPENSES:
General and administrative	0	0
Depreciation, depletion and amortization	625	625
Total costs and expenses	3,312	4,079
OPERATING INCOME	3,547	3,822
Equity in earnings of subsidiaries	0	0
Equity in earnings of equity investees	0	0
Interest (expense) income, net	(3,175)	(3,366)
Other expense	0	0
Income before income taxes	372	456
Income tax expense	0	2
NET INCOME	372	458
Net loss attributable to noncontrolling interest	7	136
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	379	594
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0
Net Loss Available to Common Unitholders	379	594
Reportable Legal Entities | Non-Guarantor Subsidiaries | Offshore pipeline transportation
REVENUES:
Total revenues	0
COSTS AND EXPENSES:
Cost of products and services sold	37	678
Reportable Legal Entities | Non-Guarantor Subsidiaries | Sodium minerals and sulfur services
REVENUES:
Total revenues	2,109	3,066
COSTS AND EXPENSES:
Cost of products and services sold	2,290	2,504
Reportable Legal Entities | Non-Guarantor Subsidiaries | Marine Transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Reportable Legal Entities | Non-Guarantor Subsidiaries | Onshore facilities and transportation
REVENUES:
Total revenues	4,750	4,835
COSTS AND EXPENSES:
Cost of products and services sold	360	272
Eliminations
REVENUES:
Total revenues	(1,800)	(2,253)
COSTS AND EXPENSES:
General and administrative	0	0
Depreciation, depletion and amortization	0	0
Total costs and expenses	(1,800)	(2,253)
OPERATING INCOME	0	0
Equity in earnings of subsidiaries	(75,704)	(70,224)
Equity in earnings of equity investees	0	0
Interest (expense) income, net	0	0
Other expense	0	0
Income before income taxes	(75,704)	(70,224)
Income tax expense	0	0
NET INCOME	(75,704)	(70,224)
Net loss attributable to noncontrolling interest	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(75,704)	(70,224)
Less: Accumulated distributions attributable to Class A Convertible Preferred Units	0	0
Net Loss Available to Common Unitholders	(75,704)	(70,224)
Eliminations | Offshore pipeline transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Eliminations | Sodium minerals and sulfur services
REVENUES:
Total revenues	(1,800)	(2,253)
COSTS AND EXPENSES:
Cost of products and services sold	(1,800)	(2,253)
Eliminations | Marine Transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	0	0
Eliminations | Onshore facilities and transportation
REVENUES:
Total revenues	0	0
COSTS AND EXPENSES:
Cost of products and services sold	$ 0	$ 0