Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 10,773	$ 7,029	$ 12,311	$ 10,895
Other current assets	341,795	352,540
Total current assets	352,568	359,569
Fixed Assets, at cost	4,814,044	4,763,396
Less: Accumulated depreciation	(591,275)	(548,532)
Net fixed assets	4,222,769	4,214,864
Goodwill	325,046	325,046
Other assets, net	386,342	394,357
Advances to Affiliate	0	0
Equity investees	399,466	408,756
Investments in subsidiaries	0	0
TOTAL ASSETS	5,686,191	5,702,592
Current liabilities	231,454	260,803
Senior secured credit facility	1,210,000	1,278,200
Senior unsecured notes	1,814,712	1,813,169
Deferred tax liabilities	26,094	25,889
Due to Affiliate	0	0
Other liabilities	200,171	204,481
Total liabilities	3,482,431	3,582,542
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,214,193	2,130,331
Partners' Capital Attributable to Noncontrolling Interest	(10,433)	(10,281)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	5,686,191	5,702,592
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	6	6	6	6
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	9,656	10,696
Advances to Affiliate	2,541,588	2,650,930
Equity investees	0	0
Investments in subsidiaries	2,715,463	2,594,882
TOTAL ASSETS	5,266,738	5,256,564
Current liabilities	27,833	34,864
Senior secured credit facility	1,210,000	1,278,200
Senior unsecured notes	1,814,712	1,813,169
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	0	0
Total liabilities	3,052,545	3,126,233
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,214,193	2,130,331
Partners' Capital Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	5,266,738	5,256,564
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	9,638	6,360	9,067	8,288
Other current assets	330,749	340,555
Total current assets	340,387	346,915
Fixed Assets, at cost	4,736,459	4,685,811
Less: Accumulated depreciation	(566,433)	(524,315)
Net fixed assets	4,170,026	4,161,496
Goodwill	325,046	325,046
Other assets, net	388,579	390,214
Advances to Affiliate	0	0
Equity investees	399,466	408,756
Investments in subsidiaries	80,587	80,735
TOTAL ASSETS	5,704,091	5,713,162
Current liabilities	187,499	211,591
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	26,094	25,889
Due to Affiliate	2,620,077	2,724,224
Other liabilities	163,761	165,266
Total liabilities	2,997,431	3,126,970
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	2,706,660	2,586,192
Partners' Capital Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	5,704,091	5,713,162
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	1,129	663	3,238	2,601
Other current assets	11,072	12,237
Total current assets	12,201	12,900
Fixed Assets, at cost	77,585	77,585
Less: Accumulated depreciation	(24,842)	(24,217)
Net fixed assets	52,743	53,368
Goodwill	0	0
Other assets, net	132,179	133,980
Advances to Affiliate	78,489	73,295
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	275,612	273,543
Current liabilities	16,277	14,505
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	0	0
Other liabilities	180,328	179,592
Total liabilities	196,605	194,097
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	89,440	89,727
Partners' Capital Attributable to Noncontrolling Interest	(10,433)	(10,281)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	275,612	273,543
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Other current assets	(51)	(302)
Total current assets	(51)	(302)
Fixed Assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Goodwill	0	0
Other assets, net	(144,072)	(140,533)
Advances to Affiliate	(2,620,077)	(2,724,225)
Equity investees	0	0
Investments in subsidiaries	(2,796,050)	(2,675,617)
TOTAL ASSETS	(5,560,250)	(5,540,677)
Current liabilities	(155)	(157)
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Due to Affiliate	(2,620,077)	(2,724,224)
Other liabilities	(143,918)	(140,377)
Total liabilities	(2,764,150)	(2,864,758)
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	(2,796,100)	(2,675,919)
Partners' Capital Attributable to Noncontrolling Interest	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (5,560,250)	$ (5,540,677)