Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 18,668	$ 11,282	$ 15,042	$ 10,817
Other current assets	467,332	392,752
Total current assets	486,000	404,034
Fixed Assets, at cost	833,151	723,225
Less: Accumulated depreciation	(177,112)	(157,944)
Net fixed assets	656,039	565,281
Goodwill	325,046	325,046
Other assets, net	261,587	266,068
Equity investees	604,380	549,235
Investments in subsidiaries	0	0
TOTAL ASSETS	2,333,052	2,109,664
Current liabilities	396,303	312,651
Senior secured credit facility	319,100	500,000
SENIOR UNSECURED NOTES	700,835	350,895
Deferred tax liabilities	13,275	13,810
Other liabilities	17,091	15,813
Total liabilities	1,446,604	1,193,169
Partners' capital	886,448	916,495
TOTAL LIABILITIES AND PARTNERS' CAPITAL	2,333,052	2,109,664
Genesis Energy, L.P. (Parent And Co-Issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	4	10	2	3
Other current assets	892,978	745,589
Total current assets	892,982	745,599
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	23,705	17,737
Equity investees	0	0
Investments in subsidiaries	1,000,004	1,006,415
TOTAL ASSETS	1,916,691	1,769,751
Current liabilities	10,308	2,361
Senior secured credit facility	319,100	500,000
SENIOR UNSECURED NOTES	700,835	350,895
Deferred tax liabilities	0	0
Other liabilities	0	0
Total liabilities	1,030,243	853,256
Partners' capital	886,448	916,495
TOTAL LIABILITIES AND PARTNERS' CAPITAL	1,916,691	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	18,233	11,214	14,653	9,182
Other current assets	444,424	367,837
Total current assets	462,657	379,051
Fixed Assets, at cost	718,382	617,519
Less: Accumulated depreciation	(162,270)	(144,882)
Net fixed assets	556,112	472,637
Goodwill	325,046	325,046
Other assets, net	244,309	254,423
Equity investees	604,380	549,235
Investments in subsidiaries	105,702	102,707
TOTAL ASSETS	2,298,206	2,083,099
Current liabilities	1,270,488	1,048,937
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	13,275	13,810
Other liabilities	13,453	13,044
Total liabilities	1,297,216	1,075,791
Partners' capital	1,000,990	1,007,308
TOTAL LIABILITIES AND PARTNERS' CAPITAL	2,298,206	2,083,099
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	431	58	387	1,632
Other current assets	44,647	41,533
Total current assets	45,078	41,591
Fixed Assets, at cost	114,769	105,706
Less: Accumulated depreciation	(14,842)	(13,062)
Net fixed assets	99,927	92,644
Goodwill	0	0
Other assets, net	155,070	157,604
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	300,075	291,839
Current liabilities	29,996	23,567
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	164,955	166,282
Total liabilities	194,951	189,849
Partners' capital	105,124	101,990
TOTAL LIABILITIES AND PARTNERS' CAPITAL	300,075	291,839
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Other current assets	(914,717)	(762,207)
Total current assets	(914,717)	(762,207)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(161,497)	(163,696)
Equity investees	0	0
Investments in subsidiaries	(1,105,706)	(1,109,122)
TOTAL ASSETS	(2,181,920)	(2,035,025)
Current liabilities	(914,489)	(762,214)
Senior secured credit facility	0	0
SENIOR UNSECURED NOTES	0	0
Deferred tax liabilities	0	0
Other liabilities	(161,317)	(163,513)
Total liabilities	(1,075,806)	(925,727)
Partners' capital	(1,106,114)	(1,109,298)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (2,181,920)	$ (2,035,025)