Condensed Consolidating Financial Information (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Offshore pipeline transportation services	$ 80,671	$ 89,717	$ 243,437	$ 244,837
Sodium minerals and sulfur services	109,765	45,725	197,879	129,585
Marine transportation	48,534	55,285	152,038	159,930
Onshore facilities and transportation	247,144	269,323	714,974	750,088
Total revenues	486,114	460,050	1,308,328	1,284,440
Onshore facilities and transportation costs	226,029	252,705	662,695	692,594
Marine transportation costs	35,789	38,490	111,980	105,942
Sodium minerals and sulfur services operating costs	79,365	25,077	133,335	67,641
Offshore pipeline transportation operating costs	18,690	23,122	54,682	63,732
General and administrative	19,409	11,212	38,723	34,716
Depreciation and amortization	63,732	54,265	176,453	156,800
Gain on sale of assets	0	0	(26,684)	0
Total costs and expenses	443,014	404,871	1,151,184	1,121,425
OPERATING INCOME	43,100	55,179	157,144	163,015
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity investees	13,044	12,488	34,805	35,362
Interest (expense) income, net	(47,388)	(34,735)	(122,117)	(104,657)
Other expense	(2,276)	0	(2,276)	0
Income from continuing operations before income taxes	6,480	32,932	67,556	93,720
Income tax (expense) benefit	(320)	(949)	(878)	(2,959)
NET INCOME	6,160	31,983	66,678	90,761
Net loss attributable to noncontrolling interest	152	118	457	370
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	6,312	32,101	67,135	91,131
Less: Accumulated distributions attributable to Series A Convertible Preferred Units	(5,469)	0	(5,469)	0
Net Income Available to Common Unitholders	843	32,101	61,666	91,131
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Offshore pipeline transportation services	0	0	0	0
Sodium minerals and sulfur services	0	0	0	0
Marine transportation	0	0	0	0
Onshore facilities and transportation	0	0	0	0
Total revenues	0	0	0	0
Onshore facilities and transportation costs	0	0	0	0
Marine transportation costs	0	0	0	0
Sodium minerals and sulfur services operating costs	0	0	0	0
Offshore pipeline transportation operating costs	0	0	0	0
General and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
Gain on sale of assets	0		0
Total costs and expenses	0	0	0	0
OPERATING INCOME	0	0	0	0
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	0	0	0	0
Other expense	0	0	0	0
Income from continuing operations before income taxes	0	0	0	0
Income tax (expense) benefit	0	0	0	0
NET INCOME	0	0	0	0
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	0	0	0	0
Less: Accumulated distributions attributable to Series A Convertible Preferred Units	0	0	0	0
Net Income Available to Common Unitholders	0	0	0	0
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Offshore pipeline transportation services	0	0	0	0
Sodium minerals and sulfur services	0	0	0	0
Marine transportation	0	0	0	0
Onshore facilities and transportation	0	0	0	0
Total revenues	0	0	0	0
Onshore facilities and transportation costs	0	0	0	0
Marine transportation costs	0	0	0	0
Sodium minerals and sulfur services operating costs	0	0	0	0
Offshore pipeline transportation operating costs	0	0	0	0
General and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
Gain on sale of assets	0		0
Total costs and expenses	0	0	0	0
OPERATING INCOME	0	0	0	0
Equity in earnings of subsidiaries	55,971	66,811	191,471	195,674
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	(47,383)	(34,710)	(122,060)	(104,543)
Other expense	(2,276)	0	(2,276)	0
Income from continuing operations before income taxes	6,312	32,101	67,135	91,131
Income tax (expense) benefit	0	0	0	0
NET INCOME	6,312	32,101	67,135	91,131
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	6,312	32,101	67,135	91,131
Less: Accumulated distributions attributable to Series A Convertible Preferred Units	(5,469)	0	(5,469)	0
Net Income Available to Common Unitholders	843	32,101	61,666	91,131
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Offshore pipeline transportation services	80,671	89,717	243,437	244,837
Sodium minerals and sulfur services	109,292	45,262	197,321	129,671
Marine transportation	48,534	55,285	152,038	159,930
Onshore facilities and transportation	242,547	264,326	700,908	734,560
Total revenues	481,044	454,590	1,293,704	1,268,998
Onshore facilities and transportation costs	225,716	252,450	661,842	691,763
Marine transportation costs	35,789	38,490	111,980	105,942
Sodium minerals and sulfur services operating costs	78,869	24,577	132,608	67,190
Offshore pipeline transportation operating costs	17,928	22,533	52,396	61,882
General and administrative	19,409	11,212	38,723	34,716
Depreciation and amortization	63,107	53,640	174,578	154,925
Gain on sale of assets	0		(26,684)
Total costs and expenses	440,818	402,902	1,145,443	1,116,418
OPERATING INCOME	40,226	51,688	148,261	152,580
Equity in earnings of subsidiaries	(388)	28	(1,033)	(50)
Equity in earnings of equity investees	13,044	12,488	34,805	35,362
Interest (expense) income, net	3,450	3,595	10,436	10,861
Other expense	0	0	0	0
Income from continuing operations before income taxes	56,332	67,799	192,469	198,753
Income tax (expense) benefit	(322)	(949)	(880)	(2,956)
NET INCOME	56,010	66,850	191,589	195,797
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	56,010	66,850	191,589	195,797
Less: Accumulated distributions attributable to Series A Convertible Preferred Units	0	0	0	0
Net Income Available to Common Unitholders	56,010	66,850	191,589	195,797
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Offshore pipeline transportation services	0		0
Sodium minerals and sulfur services	2,069	2,981	5,968	5,499
Marine transportation	0	0	0	0
Onshore facilities and transportation	4,597	4,997	14,066	15,528
Total revenues	6,666	7,978	20,034	21,027
Onshore facilities and transportation costs	313	255	853	831
Marine transportation costs	0	0	0	0
Sodium minerals and sulfur services operating costs	2,092	3,018	6,137	6,036
Offshore pipeline transportation operating costs	762	589	2,286	1,850
General and administrative	0	0	0	0
Depreciation and amortization	625	625	1,875	1,875
Gain on sale of assets	0		0
Total costs and expenses	3,792	4,487	11,151	10,592
OPERATING INCOME	2,874	3,491	8,883	10,435
Equity in earnings of subsidiaries	0	0	0	0
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	(3,455)	(3,620)	(10,493)	(10,975)
Other expense	0	0	0	0
Income from continuing operations before income taxes	(581)	(129)	(1,610)	(540)
Income tax (expense) benefit	2	0	2	(3)
NET INCOME	(579)	(129)	(1,608)	(543)
Net loss attributable to noncontrolling interest	152	118	457	370
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(427)	(11)	(1,151)	(173)
Less: Accumulated distributions attributable to Series A Convertible Preferred Units	0	0	0	0
Net Income Available to Common Unitholders	(427)	(11)	(1,151)	(173)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Offshore pipeline transportation services	0	0	0	0
Sodium minerals and sulfur services	(1,596)	(2,518)	(5,410)	(5,585)
Marine transportation	0	0	0	0
Onshore facilities and transportation	0	0	0	0
Total revenues	(1,596)	(2,518)	(5,410)	(5,585)
Onshore facilities and transportation costs	0	0	0	0
Marine transportation costs	0	0	0	0
Sodium minerals and sulfur services operating costs	(1,596)	(2,518)	(5,410)	(5,585)
Offshore pipeline transportation operating costs	0	0	0	0
General and administrative	0	0	0	0
Depreciation and amortization	0	0	0	0
Gain on sale of assets	0		0
Total costs and expenses	(1,596)	(2,518)	(5,410)	(5,585)
OPERATING INCOME	0	0	0	0
Equity in earnings of subsidiaries	(55,583)	(66,839)	(190,438)	(195,624)
Equity in earnings of equity investees	0	0	0	0
Interest (expense) income, net	0	0	0	0
Other expense	0	0	0	0
Income from continuing operations before income taxes	(55,583)	(66,839)	(190,438)	(195,624)
Income tax (expense) benefit	0	0	0	0
NET INCOME	(55,583)	(66,839)	(190,438)	(195,624)
Net loss attributable to noncontrolling interest	0	0	0	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(55,583)	(66,839)	(190,438)	(195,624)
Less: Accumulated distributions attributable to Series A Convertible Preferred Units	0	0	0	0
Net Income Available to Common Unitholders	$ (55,583)	$ (66,839)	$ (190,438)	$ (195,624)