Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 3,447	$ 10,895	$ 15,568	$ 9,462
Other current assets	308,329	295,421
Total current assets	311,776	306,316
Fixed Assets, at cost	4,707,685	4,310,226
Less: Accumulated depreciation	(509,419)	(378,247)
Net fixed assets	4,198,266	3,931,979
Goodwill	325,046	325,046
Other assets, net	403,182	421,866
Advances to Affiliate	0	0
Equity investees	417,214	474,392
Investments in subsidiaries	0	0
TOTAL ASSETS	5,655,484	5,459,599
Current liabilities	242,219	302,136
Senior secured credit facility	1,167,000	1,115,000
Senior unsecured notes	1,811,633	1,807,054
Deferred tax liabilities	24,644	22,586
Due to Affiliate	0	0
Other liabilities	227,879	192,072
Total liabilities	3,473,375	3,438,848
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,190,829	2,029,101
Partners' Capital Attributable to Noncontrolling Interest	(8,720)	(8,350)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	5,655,484	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	75	50
Total current assets	81	56
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	11,734	13,140
Advances to Affiliate	2,565,346	2,619,493
Equity investees	0	0
Investments in subsidiaries	2,620,102	2,353,804
TOTAL ASSETS	5,197,263	4,986,493
Current liabilities	27,801	35,338
Senior secured credit facility	1,167,000	1,115,000
Senior unsecured notes	1,811,633	1,807,054
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	0	0
Total liabilities	3,006,434	2,957,392
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,190,829	2,029,101
Partners' Capital Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	5,197,263	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
TOTAL LIABILITIES AND PARTNERS' CAPITAL	0	0
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	2,126	8,288	13,044	8,310
Other current assets	296,951	285,313
Total current assets	299,077	293,601
Fixed Assets, at cost	4,630,100	4,232,641
Less: Accumulated depreciation	(485,827)	(356,530)
Net fixed assets	4,144,273	3,876,111
Goodwill	325,046	325,046
Other assets, net	393,117	394,294
Advances to Affiliate	0	0
Equity investees	417,214	474,392
Investments in subsidiaries	90,214	90,741
TOTAL ASSETS	5,668,941	5,454,185
Current liabilities	214,404	267,294
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	24,644	22,586
Due to Affiliate	2,631,455	2,666,527
Other liabilities	185,481	150,877
Total liabilities	3,055,984	3,107,284
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,612,957	2,346,901
Partners' Capital Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	5,668,941	5,454,185
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,315	2,601	2,518	1,143
Other current assets	11,694	10,422
Total current assets	13,009	13,023
Fixed Assets, at cost	77,585	77,585
Less: Accumulated depreciation	(23,592)	(21,717)
Net fixed assets	53,993	55,868
Goodwill	0	0
Other assets, net	135,283	140,409
Advances to Affiliate	66,110	47,034
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	268,395	256,334
Current liabilities	150	0
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	179,191	167,006
Total liabilities	179,341	167,006
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	97,774	97,678
Partners' Capital Attributable to Noncontrolling Interest	(8,720)	(8,350)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	268,395	256,334
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Other current assets	(391)	(364)
Total current assets	(391)	(364)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(136,952)	(125,977)
Advances to Affiliate	(2,631,456)	(2,666,527)
Equity investees	0	0
Investments in subsidiaries	(2,710,316)	(2,444,545)
TOTAL ASSETS	(5,479,115)	(5,237,413)
Current liabilities	(136)	(496)
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	(2,631,455)	(2,666,527)
Other liabilities	(136,793)	(125,811)
Total liabilities	(2,768,384)	(2,792,834)
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	(2,710,731)	(2,444,579)
Partners' Capital Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (5,479,115)	$ (5,237,413)