Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 9,462	$ 8,866	$ 11,282	$ 10,817
Other current assets	345,904	526,357
Total current assets	355,366	535,223
FIXED ASSETS, at cost	1,899,058	1,327,974
Less: Accumulated depreciation	(268,057)	(199,230)
Net fixed assets	1,631,001	1,128,744
GOODWILL	325,046	325,046
Other assets, net	290,181	252,942
Equity investees and other investments	628,780	620,247
Investments in subsidiaries	0	0
TOTAL ASSETS	3,230,374	2,862,202	2,109,664
Current liabilities	363,145	446,553
Senior secured credit facility	550,400	582,800
SENIOR UNSECURED NOTES	1,050,639	700,772
Deferred tax liabilities	18,754	15,944
Other liabilities	18,233	18,396
Total liabilities	2,001,171	1,764,465
Partners' capital	1,229,203	1,097,737	916,495	792,638
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	3,230,374	2,862,202
Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	9	20	10	3
Other current assets	1,378,573	1,133,695
Total current assets	1,378,582	1,133,715
FIXED ASSETS, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
GOODWILL	0	0
Other assets, net	28,421	21,432
Equity investees and other investments	0	0
Investments in subsidiaries	1,434,255	1,236,164
TOTAL ASSETS	2,841,258	2,391,311
Current liabilities	11,016	10,002
Senior secured credit facility	550,400	582,800
SENIOR UNSECURED NOTES	1,050,639	700,772
Deferred tax liabilities	0	0
Other liabilities	0	0
Total liabilities	1,612,055	1,293,574
Partners' capital	1,229,203	1,097,737
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	2,841,258	2,391,311
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
GOODWILL	0	0
Other assets, net	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 facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	0	0
Total liabilities	0	0
Partners' capital	0	0
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	0	0
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	8,352	8,061	11,214	9,182
Other current assets	327,819	498,230
Total current assets	336,171	506,291
FIXED ASSETS, at cost	1,781,158	1,211,356
Less: Accumulated depreciation	(245,548)	(181,905)
Net fixed assets	1,535,610	1,029,451
GOODWILL	325,046	325,046
Other assets, net	269,252	238,282
Equity investees and other investments	628,780	620,247
Investments in subsidiaries	126,035	124,718
TOTAL ASSETS	3,220,894	2,844,035
Current liabilities	1,751,548	1,576,186
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	18,754	15,944
Other liabilities	15,082	14,664
Total liabilities	1,785,384	1,606,794
Partners' capital	1,435,510	1,237,241
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	3,220,894	2,844,035
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,101	785	58	1,632
Other current assets	51,781	54,199
Total current assets	52,882	54,984
FIXED ASSETS, at cost	117,900	116,618
Less: Accumulated depreciation	(22,509)	(17,325)
Net fixed assets	95,391	99,293
GOODWILL	0	0
Other assets, net	146,700	152,413
Equity investees and other investments	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	294,973	306,690
Current liabilities	13,013	19,660
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	157,172	162,739
Total liabilities	170,185	182,399
Partners' capital	124,788	124,291
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	294,973	306,690
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Other current assets	(1,412,269)	(1,159,767)
Total current assets	(1,412,269)	(1,159,767)
FIXED ASSETS, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
GOODWILL	0	0
Other assets, net	(154,192)	(159,185)
Equity investees and other investments	0	0
Investments in subsidiaries	(1,560,290)	(1,360,882)
TOTAL ASSETS	(3,126,751)	(2,679,834)
Current liabilities	(1,412,432)	(1,159,295)
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	(154,021)	(159,007)
Total liabilities	(1,566,453)	(1,318,302)
Partners' capital	(1,560,298)	(1,361,532)
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	$ (3,126,751)	$ (2,679,834)