Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 15,983	$ 11,282	$ 14,324	$ 10,817
Other current assets	466,274	392,752
Total current assets	482,257	404,034
Fixed Assets, at cost	759,892	723,225
Less: Accumulated depreciation	(168,147)	(157,944)
Net fixed assets	591,745	565,281
Goodwill	325,046	325,046
Other assets, net	268,159	266,068
Equity investees	608,076	549,235
Investments in subsidiaries	0	0
TOTAL ASSETS	2,275,283	2,109,664
Current liabilities	373,379	312,651
Senior secured credit facility	271,000	500,000
SENIOR UNSECURED NOTES	700,865	350,895
Deferred tax liabilities	13,488	13,810
Other liabilities	16,600	15,813
Total liabilities	1,375,332	1,193,169
Partners' capital	899,951	916,495
TOTAL LIABILITIES AND PARTNERS' CAPITAL	2,275,283	2,109,664
Genesis Energy, L.P. (Parent And Co-Issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	5	10	3	3
Other current assets	857,903	745,589
Total current assets	857,908	745,599
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	24,842	17,737
Equity investees		0
Investments in subsidiaries	1,001,279	1,006,415
TOTAL ASSETS	1,884,029	1,769,751
Current liabilities	12,213	2,361
Senior secured credit facility	271,000	500,000
SENIOR UNSECURED NOTES	700,865	350,895
Deferred tax liabilities	0	0
Other liabilities	0	0
Total liabilities	984,078	853,256
Partners' capital	899,951	916,495
TOTAL LIABILITIES AND PARTNERS' CAPITAL	1,884,029	1,769,751
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
Partners' capital	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	0	0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	15,836	11,214	13,885	9,182
Other current assets	434,548	367,837
Total current assets	450,384	379,051
Fixed Assets, at cost	648,992	617,519
Less: Accumulated depreciation	(154,184)	(144,882)
Net fixed assets	494,808	472,637
Goodwill	325,046	325,046
Other assets, net	249,576	254,423
Equity investees	608,076	549,235
Investments in subsidiaries	105,378	102,707
TOTAL ASSETS	2,233,268	2,083,099
Current liabilities	1,204,308	1,048,937
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	13,488	13,810
Other liabilities	13,249	13,044
Total liabilities	1,231,045	1,075,791
Partners' capital	1,002,223	1,007,308
TOTAL LIABILITIES AND PARTNERS' CAPITAL	2,233,268	2,083,099
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	142	58	436	1,632
Other current assets	50,483	41,533
Total current assets	50,625	41,591
Fixed Assets, at cost	110,900	105,706
Less: Accumulated depreciation	(13,963)	(13,062)
Net fixed assets	96,937	92,644
Goodwill	0	0
Other assets, net	156,352	157,604
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	303,914	291,839
Current liabilities	33,681	23,567
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	165,780	166,282
Total liabilities	199,461	189,849
Partners' capital	104,453	101,990
TOTAL LIABILITIES AND PARTNERS' CAPITAL	303,914	291,839
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Other current assets	(876,660)	(762,207)
Total current assets	(876,660)	(762,207)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(162,611)	(163,696)
Equity investees	0	0
Investments in subsidiaries	(1,106,657)	(1,109,122)
TOTAL ASSETS	(2,145,928)	(2,035,025)
Current liabilities	(876,823)	(762,214)
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	(162,429)	(163,513)
Total liabilities	(1,039,252)	(925,727)
Partners' capital	(1,106,676)	(1,109,298)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (2,145,928)	$ (2,035,025)