Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 8,719	$ 9,462	$ 14,326	$ 8,866
Other current assets	351,051	345,904
Total current assets	359,770	355,366
Fixed Assets, at cost	2,120,646	1,899,058
Less: Accumulated depreciation	(304,876)	(268,057)
Net fixed assets	1,815,770	1,631,001
Goodwill	325,046	325,046
Other assets, net	289,286	290,181
Equity investees	614,409	628,780
Investments in subsidiaries	0	0
TOTAL ASSETS	3,404,281	3,230,374
Current liabilities	342,118	363,145
Senior secured credit facility	585,200	550,400
Senior unsecured notes	1,100,000	1,050,639
Deferred tax liabilities	20,005	18,754
Other liabilities	15,469	18,233
Total liabilities	2,062,792	2,001,171
Limited Partners' Capital Account	1,341,489	1,229,203	1,052,424	1,097,737
TOTAL LIABILITIES AND PARTNERS' CAPITAL	3,404,281	3,230,374
Genesis Energy, L.P. (Parent And Co-Issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6	9	10	20
Other current assets	1,406,653	1,378,573
Total current assets	1,406,659	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	29,677	28,421
Equity investees	0	0
Investments in subsidiaries	1,602,824	1,434,255
TOTAL ASSETS	3,039,160	2,841,258
Current liabilities	12,471	11,016
Senior secured credit facility	585,200	550,400
Senior unsecured notes	1,100,000	1,050,639
Deferred tax liabilities	0	0
Other liabilities	0	0
Total liabilities	1,697,671	1,612,055
Limited Partners' Capital Account	1,341,489	1,229,203
TOTAL LIABILITIES AND PARTNERS' CAPITAL	3,039,160	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	8,006	8,310	13,261	8,050
Other current assets	338,521	333,385
Total current assets	346,527	341,695
Fixed Assets, at cost	2,045,180	1,823,556
Less: Accumulated depreciation	(286,734)	(251,171)
Net fixed assets	1,758,446	1,572,385
Goodwill	325,046	325,046
Other assets, net	267,482	269,252
Equity investees	614,409	628,780
Investments in subsidiaries	100,279	97,195
TOTAL ASSETS	3,412,189	3,234,353
Current liabilities	1,772,548	1,761,856
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	20,005	18,754
Other liabilities	15,470	18,233
Total liabilities	1,808,023	1,798,843
Limited Partners' Capital Account	1,604,166	1,435,510
TOTAL LIABILITIES AND PARTNERS' CAPITAL	3,412,189	3,234,353
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	707	1,143	1,055	796
Other current assets	50,763	46,215
Total current assets	51,470	47,358
Fixed Assets, at cost	75,466	75,502
Less: Accumulated depreciation	(18,142)	(16,886)
Net fixed assets	57,324	58,616
Goodwill	0	0
Other assets, net	143,627	146,700
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	252,421	252,674
Current liabilities	2,113	2,705
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Other liabilities	151,331	154,021
Total liabilities	153,444	156,726
Limited Partners' Capital Account	98,977	95,948
TOTAL LIABILITIES AND PARTNERS' CAPITAL	252,421	252,674
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Other current assets	(1,444,886)	(1,412,269)
Total current assets	(1,444,886)	(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	(151,500)	(154,192)
Equity investees	0	0
Investments in subsidiaries	(1,703,103)	(1,531,450)
TOTAL ASSETS	(3,299,489)	(3,097,911)
Current liabilities	(1,445,014)	(1,412,432)
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Other liabilities	(151,332)	(154,021)
Total liabilities	(1,596,346)	(1,566,453)
Limited Partners' Capital Account	(1,703,143)	(1,531,458)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (3,299,489)	$ (3,097,911)