Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 9,041		$ 7,029	$ 10,895	$ 9,462
Other current assets	626,992		352,540
Total current assets	636,033		359,569
Fixed assets, at cost	5,601,015		4,763,396
Less: Accumulated depreciation	(734,986)		(548,532)
Net fixed assets	4,866,029		4,214,864
MINERALS LEASEHOLDS, net of accumulated depletion	564,506		0
Goodwill	325,046		325,046
Other assets, net	364,317		394,357
Advances to affiliates	0		0
Equity investees and other investments	381,550		408,756
Investments in subsidiaries	0		0
TOTAL ASSETS	7,137,481		5,702,592	5,459,599
Current liabilities	456,264		260,803
Senior secured credit facilities	1,099,200		1,278,200
Senior unsecured notes	2,598,918		1,813,169
Deferred tax liabilities	11,913		15,971
Deferred tax liabilities	20,134		25,889
Advances from affiliates	0		0
Other liabilities	256,571		204,481
Total liabilities	4,422,866		3,582,542
Class A Convertible Preferred Units	697,151		0
Partners’ capital, common units	2,026,147		2,130,331
Accumulated other comprehensive loss	(604)	[1]	0
Noncontrolling interests	(8,079)		(10,281)
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	7,137,481		5,702,592
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0		0	0	0
Other current assets	0		0
Total current assets	0		0
Fixed assets, at cost	0		0
Less: Accumulated depreciation	0		0
Net fixed assets	0		0
MINERALS LEASEHOLDS, net of accumulated depletion	0		0
Goodwill	0		0
Other assets, net	0		0
Advances to affiliates	0		0
Equity investees and other investments	0		0
Investments in subsidiaries	0		0
TOTAL ASSETS	0		0
Current liabilities	0		0
Senior secured credit facilities	0		0
Senior unsecured notes	0		0
Deferred tax liabilities	0
Deferred tax liabilities			0
Advances from affiliates	0		0
Other liabilities	0		0
Total liabilities	0		0
Class A Convertible Preferred Units	0		0
Partners’ capital, common units	0		0
Accumulated other comprehensive loss	0	[1]	0
Noncontrolling interests	0		0
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	0		0
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6		6	6	9
Other current assets	50		50
Total current assets	56		56
Fixed assets, at cost	0		0
Less: Accumulated depreciation	0		0
Net fixed assets	0		0
MINERALS LEASEHOLDS, net of accumulated depletion	0		0
Goodwill	0		0
Other assets, net	14,083		10,696
Advances to affiliates	3,808,712		2,650,930
Equity investees and other investments	0		0
Investments in subsidiaries	2,689,861		2,594,882
TOTAL ASSETS	6,512,712		5,256,564
Current liabilities	46,086		34,864
Senior secured credit facilities	1,099,200		1,278,200
Senior unsecured notes	2,598,918		1,813,169
Deferred tax liabilities	0
Deferred tax liabilities			0
Advances from affiliates	0		0
Other liabilities	45,210		0
Total liabilities	3,789,414		3,126,233
Class A Convertible Preferred Units	697,151		0
Partners’ capital, common units	2,026,147		2,130,331
Accumulated other comprehensive loss	0	[1]	0
Noncontrolling interests	0		0
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	6,512,712		5,256,564
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	8,340		6,360	8,288	8,310
Other current assets	614,682		340,555
Total current assets	623,022		346,915
Fixed assets, at cost	5,523,431		4,685,811
Less: Accumulated depreciation	(708,269)		(524,315)
Net fixed assets	4,815,162		4,161,496
MINERALS LEASEHOLDS, net of accumulated depletion	564,506		0
Goodwill	325,046		325,046
Other assets, net	378,371		390,214
Advances to affiliates	0		0
Equity investees and other investments	381,550		408,756
Investments in subsidiaries	82,616		80,735
TOTAL ASSETS	7,170,273		5,713,162
Current liabilities	399,017		211,591
Senior secured credit facilities	0		0
Senior unsecured notes	0		0
Deferred tax liabilities	11,913
Deferred tax liabilities			25,889
Advances from affiliates	3,894,027		2,724,224
Other liabilities	182,414		165,266
Total liabilities	4,487,371		3,126,970
Class A Convertible Preferred Units	0		0
Partners’ capital, common units	2,683,506		2,586,192
Accumulated other comprehensive loss	(604)	[1]	0
Noncontrolling interests	0		0
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	7,170,273		5,713,162
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	695		663	2,601	1,143
Other current assets	12,316		12,237
Total current assets	13,011		12,900
Fixed assets, at cost	77,584		77,585
Less: Accumulated depreciation	(26,717)		(24,217)
Net fixed assets	50,867		53,368
MINERALS LEASEHOLDS, net of accumulated depletion	0		0
Goodwill	0		0
Other assets, net	126,300		133,980
Advances to affiliates	85,423		73,295
Equity investees and other investments	0		0
Investments in subsidiaries	0		0
TOTAL ASSETS	275,601		273,543
Current liabilities	11,417		14,505
Senior secured credit facilities	0		0
Senior unsecured notes	0		0
Deferred tax liabilities	0
Deferred tax liabilities			0
Advances from affiliates	0		0
Other liabilities	183,237		179,592
Total liabilities	194,654		194,097
Class A Convertible Preferred Units	0		0
Partners’ capital, common units	89,026		89,727
Accumulated other comprehensive loss	0	[1]	0
Noncontrolling interests	(8,079)		(10,281)
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	275,601		273,543
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0		0	$ 0	$ 0
Other current assets	(56)		(302)
Total current assets	(56)		(302)
Fixed assets, at cost	0		0
Less: Accumulated depreciation	0		0
Net fixed assets	0		0
MINERALS LEASEHOLDS, net of accumulated depletion	0		0
Goodwill	0		0
Other assets, net	(154,437)		(140,533)
Advances to affiliates	(3,894,135)		(2,724,225)
Equity investees and other investments	0		0
Investments in subsidiaries	(2,772,477)		(2,675,617)
TOTAL ASSETS	(6,821,105)		(5,540,677)
Current liabilities	(256)		(157)
Senior secured credit facilities	0		0
Senior unsecured notes	0		0
Deferred tax liabilities	0
Deferred tax liabilities			0
Advances from affiliates	(3,894,027)		(2,724,224)
Other liabilities	(154,290)		(140,377)
Total liabilities	(4,048,573)		(2,864,758)
Class A Convertible Preferred Units	0		0
Partners’ capital, common units	(2,772,532)		(2,675,919)
Accumulated other comprehensive loss	0	[1]	0
Noncontrolling interests	0		0
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	$ (6,821,105)		$ (5,540,677)

[1] The entire balance and activity within Accumulated Other Comprehensive Income is related to our pension held within our Guarantor Subsidiaries.