Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 12,311	$ 10,895	$ 11,138	$ 9,462
Other current assets	314,060	295,421
Total current assets	326,371	306,316
Fixed Assets, at cost	4,476,649	4,310,226
Less: Accumulated depreciation	(416,425)	(378,247)
Net fixed assets	4,060,224	3,931,979
Goodwill	325,046	325,046
Other assets, net	419,033	421,866
Advances to Affiliate	0	0
Equity investees	438,700	474,392
Investments in subsidiaries	0	0
TOTAL ASSETS	5,569,374	5,459,599
Current liabilities	257,374	302,136
Senior secured credit facility	1,280,000	1,115,000
Senior unsecured notes	1,808,575	1,807,054
Deferred tax liabilities	23,286	22,586
Due to Affiliate	0	0
Other liabilities	216,298	192,072
Total liabilities	3,585,533	3,438,848
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	1,992,317	2,029,101
Partners' Capital Attributable to Noncontrolling Interest	(8,476)	(8,350)
Liabilities and Equity	5,569,374	5,459,599
Genesis Energy, L.P. (Parent And Co-Issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6	6	9	9
Other current assets	25	50
Total current assets	31	56
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	12,221	13,140
Advances to Affiliate	2,745,965	2,619,493
Equity investees	0	0
Investments in subsidiaries	2,350,451	2,353,804
TOTAL ASSETS	5,108,668	4,986,493
Current liabilities	28,719	35,338
Senior secured credit facility	1,280,000	1,115,000
Senior unsecured notes	1,808,575	1,807,054
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	0	0
Total liabilities	3,117,294	2,957,392
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	1,991,374	2,029,101
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	5,108,668	4,986,493
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
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
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	9,067	8,288	8,774	8,352
Other current assets	304,833	285,313
Total current assets	313,900	293,601
Fixed Assets, at cost	4,399,064	4,232,641
Less: Accumulated depreciation	(394,083)	(356,530)
Net fixed assets	4,004,981	3,876,111
Goodwill	325,046	325,046
Other assets, net	397,746	394,294
Advances to Affiliate	0	0
Equity investees	438,700	474,392
Investments in subsidiaries	90,700	90,741
TOTAL ASSETS	5,571,073	5,454,185
Current liabilities	229,053	267,294
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	23,286	22,586
Due to Affiliate	2,799,729	2,666,527
Other liabilities	174,620	150,877
Total liabilities	3,226,688	3,107,284
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,344,385	2,346,901
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	5,571,073	5,454,185
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	3,238	2,601	2,355	1,101
Other current assets	9,468	10,422
Total current assets	12,706	13,023
Fixed Assets, at cost	77,585	77,585
Less: Accumulated depreciation	(22,342)	(21,717)
Net fixed assets	55,243	55,868
Goodwill	0	0
Other assets, net	138,739	140,409
Advances to Affiliate	53,764	47,034
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	260,452	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	171,189	167,006
Total liabilities	171,189	167,006
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	97,739	97,678
Partners' Capital Attributable to Noncontrolling Interest	(8,476)	(8,350)
Liabilities and Equity	260,452	256,334
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Other current assets	(266)	(364)
Total current assets	(266)	(364)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(129,673)	(125,977)
Advances to Affiliate	(2,799,729)	(2,666,527)
Equity investees	0	0
Investments in subsidiaries	(2,441,151)	(2,444,545)
TOTAL ASSETS	(5,370,819)	(5,237,413)
Current liabilities	(398)	(496)
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	(2,799,729)	(2,666,527)
Other liabilities	(129,511)	(125,811)
Total liabilities	(2,929,638)	(2,792,834)
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	(2,441,181)	(2,444,579)
Partners' Capital Attributable to Noncontrolling Interest	0	0
Liabilities and Equity	$ (5,370,819)	$ (5,237,413)