Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 11,138	$ 9,462	$ 11,676	$ 8,866
Other current assets	296,802	345,904
Total current assets	307,940	355,366
Fixed Assets, at cost	2,017,239	1,899,058
Less: Accumulated depreciation	(287,077)	(268,057)
Net fixed assets	1,730,162	1,631,001
Goodwill	325,046	325,046
Other assets, net	288,845	290,181
Equity investees	620,147	628,780
Investments in subsidiaries	0	0
TOTAL ASSETS	3,272,140	3,230,374
Current liabilities	342,571	363,145
Senior secured credit facility	648,400	550,400
SENIOR UNSECURED NOTES	1,050,604	1,050,639
Deferred tax liabilities	19,363	18,754
Other liabilities	18,326	18,233
Total liabilities	2,079,264	2,001,171
Limited Partners' Capital Account	1,192,876	1,229,203	1,080,059	1,097,737
Partners' capital	1,192,876	1,229,203
TOTAL LIABILITIES AND PARTNERS' CAPITAL	3,272,140	3,230,374
Genesis Energy, L.P. (Parent And Co-Issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	9	9	19	20
Other current assets	1,465,246	1,378,573
Total current assets	1,465,255	1,378,582
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	27,140	28,421
Equity investees	0	0
Investments in subsidiaries	1,417,120	1,434,255
TOTAL ASSETS	2,909,515	2,841,258
Current liabilities	17,635	11,016
Senior secured credit facility	648,400	550,400
SENIOR UNSECURED NOTES	1,050,604	1,050,639
Deferred tax liabilities	0	0
Other liabilities	0	0
Total liabilities	1,716,639	1,612,055
Limited Partners' Capital Account	1,192,876	1,229,203
TOTAL LIABILITIES AND PARTNERS' CAPITAL	2,909,515	2,841,258
Genesis Energy Finance Corporation (Co-Issuer) [Member]
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	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
Limited Partners' Capital Account	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	0	0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	8,789	8,352	10,874	8,061
Other current assets	284,622	327,819
Total current assets	293,411	336,171
Fixed Assets, at cost	1,899,218	1,781,158
Less: Accumulated depreciation	(263,259)	(245,548)
Net fixed assets	1,635,959	1,535,610
Goodwill	325,046	325,046
Other assets, net	269,385	269,252
Equity investees	620,147	628,780
Investments in subsidiaries	126,985	126,035
TOTAL ASSETS	3,270,933	3,220,894
Current liabilities	1,818,022	1,751,548
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	19,363	18,754
Other liabilities	15,130	15,082
Total liabilities	1,852,515	1,785,384
Limited Partners' Capital Account	1,418,418	1,435,510
TOTAL LIABILITIES AND PARTNERS' CAPITAL	3,270,933	3,220,894
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	2,340	1,101	783	785
Other current assets	48,182	51,781
Total current assets	50,522	52,882
Fixed Assets, at cost	118,021	117,900
Less: Accumulated depreciation	(23,818)	(22,509)
Net fixed assets	94,203	95,391
Goodwill	0	0
Other assets, net	145,184	146,700
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	289,909	294,973
Current liabilities	8,327	13,013
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	155,891	157,172
Total liabilities	164,218	170,185
Limited Partners' Capital Account	125,691	124,788
TOTAL LIABILITIES AND PARTNERS' CAPITAL	289,909	294,973
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Other current assets	(1,501,248)	(1,412,269)
Total current assets	(1,501,248)	(1,412,269)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(152,864)	(154,192)
Equity investees	0	0
Investments in subsidiaries	(1,544,105)	(1,560,290)
TOTAL ASSETS	(3,198,217)	(3,126,751)
Current liabilities	(1,501,413)	(1,412,432)
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	(152,695)	(154,021)
Total liabilities	(1,654,108)	(1,566,453)
Limited Partners' Capital Account	(1,544,109)	(1,560,298)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (3,198,217)	$ (3,126,751)