Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 9,694	$ 7,029	$ 3,447	$ 10,895
Other current assets	581,130	352,540
Total current assets	590,824	359,569
Fixed assets, at cost	5,522,292	4,763,396
Less: Accumulated depreciation	(681,900)	(548,532)
Net fixed assets	4,840,392	4,214,864
Mineral Leaseholds	622,756	0
Goodwill	325,046	325,046
Other assets, net	375,425	394,357
Advances to affiliates	0	0
Equity investees	383,191	408,756
Investments in subsidiaries	0	0
TOTAL ASSETS	7,137,634	5,702,592
Current liabilities	364,011	260,803
Senior secured credit facility	1,372,500	1,278,200
Senior unsecured notes	2,358,049	1,813,169
Deferred tax liabilities	26,399	25,889
Advances from affiliates	0	0
Other liabilities	256,462	204,481
Liabilities	4,377,421	3,582,542
Series A Convertible Preferred Units, 22,249,494 issued and outstanding at September 30, 2017	691,708	0
Common unitholders, 122,579,218 and 117,979,218 units issued and outstanding at September 30, 2017 and December 31, 2016, respectively	2,077,393	2,130,331
Noncontrolling interests	(8,888)	(10,281)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	7,137,634	5,702,592
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
Mineral Leaseholds	0	0
Goodwill	0	0
Other assets, net	0	0
Advances to affiliates	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
Advances from affiliates	0	0
Other liabilities	0	0
Liabilities	0	0
Series A Convertible Preferred Units, 22,249,494 issued and outstanding at September 30, 2017	0	0
Common unitholders, 122,579,218 and 117,979,218 units issued and outstanding at September 30, 2017 and December 31, 2016, respectively	0	0
Noncontrolling interests	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	0	0
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	75	50
Total current assets	81	56
Fixed assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Mineral Leaseholds	0	0
Goodwill	0	0
Other assets, net	15,229	10,696
Advances to affiliates	3,889,517	2,650,930
Equity investees	0	0
Investments in subsidiaries	2,666,281	2,594,882
TOTAL ASSETS	6,571,108	5,256,564
Current liabilities	34,731	34,864
Senior secured credit facility	1,372,500	1,278,200
Senior unsecured notes	2,358,049	1,813,169
Deferred tax liabilities	0	0
Advances from affiliates	0	0
Other liabilities	36,727	0
Liabilities	3,802,007	3,126,233
Series A Convertible Preferred Units, 22,249,494 issued and outstanding at September 30, 2017	691,708	0
Common unitholders, 122,579,218 and 117,979,218 units issued and outstanding at September 30, 2017 and December 31, 2016, respectively	2,077,393	2,130,331
Noncontrolling interests	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	6,571,108	5,256,564
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	8,960	6,360	2,126	8,288
Other current assets	569,457	340,555
Total current assets	578,417	346,915
Fixed assets, at cost	5,444,707	4,685,811
Less: Accumulated depreciation	(655,808)	(524,315)
Net fixed assets	4,788,899	4,161,496
Mineral Leaseholds	622,756	0
Goodwill	325,046	325,046
Other assets, net	382,916	390,214
Advances to affiliates	0	0
Equity investees	383,191	408,756
Investments in subsidiaries	81,135	80,735
TOTAL ASSETS	7,162,360	5,713,162
Current liabilities	321,339	211,591
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	26,399	25,889
Advances from affiliates	3,971,992	2,724,224
Other liabilities	183,552	165,266
Liabilities	4,503,282	3,126,970
Series A Convertible Preferred Units, 22,249,494 issued and outstanding at September 30, 2017	0	0
Common unitholders, 122,579,218 and 117,979,218 units issued and outstanding at September 30, 2017 and December 31, 2016, respectively	2,659,078	2,586,192
Noncontrolling interests	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	7,162,360	5,713,162
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	728	663	1,315	2,601
Other current assets	11,836	12,237
Total current assets	12,564	12,900
Fixed assets, at cost	77,585	77,585
Less: Accumulated depreciation	(26,092)	(24,217)
Net fixed assets	51,493	53,368
Mineral Leaseholds	0	0
Goodwill	0	0
Other assets, net	128,306	133,980
Advances to affiliates	82,479	73,295
Equity investees	0	0
Investments in subsidiaries	0	0
TOTAL ASSETS	274,842	273,543
Current liabilities	8,092	14,505
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Advances from affiliates	0	0
Other liabilities	187,057	179,592
Liabilities	195,149	194,097
Series A Convertible Preferred Units, 22,249,494 issued and outstanding at September 30, 2017	0	0
Common unitholders, 122,579,218 and 117,979,218 units issued and outstanding at September 30, 2017 and December 31, 2016, respectively	88,581	89,727
Noncontrolling interests	(8,888)	(10,281)
TOTAL LIABILITIES AND PARTNERS' CAPITAL	274,842	273,543
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Other current assets	(238)	(302)
Total current assets	(238)	(302)
Fixed assets, at cost	0	0
Less: Accumulated depreciation	0	0
Net fixed assets	0	0
Mineral Leaseholds	0	0
Goodwill	0	0
Other assets, net	(151,026)	(140,533)
Advances to affiliates	(3,971,996)	(2,724,225)
Equity investees	0	0
Investments in subsidiaries	(2,747,416)	(2,675,617)
TOTAL ASSETS	(6,870,676)	(5,540,677)
Current liabilities	(151)	(157)
Senior secured credit facility	0	0
Senior unsecured notes	0	0
Deferred tax liabilities	0	0
Advances from affiliates	(3,971,992)	(2,724,224)
Other liabilities	(150,874)	(140,377)
Liabilities	(4,123,017)	(2,864,758)
Series A Convertible Preferred Units, 22,249,494 issued and outstanding at September 30, 2017	0	0
Common unitholders, 122,579,218 and 117,979,218 units issued and outstanding at September 30, 2017 and December 31, 2016, respectively	(2,747,659)	(2,675,919)
Noncontrolling interests	0	0
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ (6,870,676)	$ (5,540,677)