Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 8,550	$ 10,895	$ 8,719	$ 9,462
Other current assets	363,976	295,421
Total current assets	372,526	306,316
Fixed Assets, at cost	4,589,038	4,310,226
Less: Accumulated depreciation	(463,244)	(378,247)
Net fixed assets	4,125,794	3,931,979
Goodwill	325,046	325,046
Other assets, net	414,887	421,866
Advances to Affiliate	0	0
Equity investees	427,558	474,392
Investments in subsidiaries	0	0
TOTAL ASSETS	5,665,811	5,459,599
Current liabilities	267,614	302,136
Senior secured credit facility	1,405,800	1,115,000
Senior unsecured notes	1,810,101	1,807,054
Deferred tax liabilities	23,995	22,586
Due to Affiliate	0	0
Other liabilities	224,820	192,072
Total liabilities	3,732,330	3,438,848
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	1,942,083	2,029,101
Partners' Capital Attributable to Noncontrolling Interest	(8,602)	(8,350)
Liabilities and Equity	5,665,811	5,459,599
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6	6	6	9
Other current assets	100	50
Total current assets	106	56
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	12,734	13,140
Advances to Affiliate	2,843,031	2,619,493
Equity investees	0	0
Investments in subsidiaries	2,336,668	2,353,804
TOTAL ASSETS	5,192,539	4,986,493
Current liabilities	34,555	35,338
Senior secured credit facility	1,405,800	1,115,000
Senior unsecured notes	1,810,101	1,807,054
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	0	0
Total liabilities	3,250,456	2,957,392
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	1,942,083	2,029,101
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	5,192,539	4,986,493
Reportable Legal Entities | 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
Advances to Affiliate	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
Due to Affiliate	0	0
Other liabilities	0	0
Total liabilities	0	0
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	0	0
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	0	0
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6,933	8,288	7,999	8,310
Other current assets	353,548	285,313
Total current assets	360,481	293,601
Fixed Assets, at cost	4,511,453	4,232,641
Less: Accumulated depreciation	(440,277)	(356,530)
Net fixed assets	4,071,176	3,876,111
Goodwill	325,046	325,046
Other assets, net	398,460	394,294
Advances to Affiliate	0	0
Equity investees	427,558	474,392
Investments in subsidiaries	90,100	90,741
TOTAL ASSETS	5,672,821	5,454,185
Current liabilities	233,286	267,294
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	23,995	22,586
Due to Affiliate	2,903,302	2,666,527
Other liabilities	182,661	150,877
Total liabilities	3,343,244	3,107,284
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,329,577	2,346,901
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	5,672,821	5,454,185
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,611	2,601	714	1,143
Other current assets	10,868	10,422
Total current assets	12,479	13,023
Fixed Assets, at cost	77,585	77,585
Less: Accumulated depreciation	(22,967)	(21,717)
Net fixed assets	54,618	55,868
Goodwill	0	0
Other assets, net	137,028	140,409
Advances to Affiliate	60,272	47,034
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	264,397	256,334
Current liabilities	0	0
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	175,332	167,006
Total liabilities	175,332	167,006
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	97,667	97,678
Partners' Capital Attributable to Noncontrolling Interest	(8,602)	(8,350)
Liabilities and Equity	264,397	256,334
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Other current assets	(540)	(364)
Total current assets	(540)	(364)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(133,335)	(125,977)
Advances to Affiliate	(2,903,303)	(2,666,527)
Equity investees	0	0
Investments in subsidiaries	(2,426,768)	(2,444,545)
TOTAL ASSETS	(5,463,946)	(5,237,413)
Current liabilities	(227)	(496)
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	(2,903,302)	(2,666,527)
Other liabilities	(133,173)	(125,811)
Total liabilities	(3,036,702)	(2,792,834)
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	(2,427,244)	(2,444,579)
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	$ (5,463,946)	$ (5,237,413)