Condensed Consolidating Financial Information (Condensed Consolidating Statement Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Offshore Pipeline Transportation Services Revenues	$ 78,994		$ 1,258		$ 155,120	$ 2,048
Pipeline transportation services	16,250		18,933		34,401	38,001
Refinery services	41,324		46,324		83,860	92,448
Marine Transportation Revenues	52,609		62,594		104,645	119,965
Supply And Logistics Revenues	256,799		527,218		446,364	930,722
Total revenues	445,976		656,327		824,390	1,183,184
Supply and logistics costs	246,360		515,907		427,393	912,064
Marine Transportation Operating Costs	34,430		35,286		67,452	66,880
Refinery services operating costs	21,579		25,835		42,564	52,862
Offshore Pipeline Transportation Operating Costs	22,676		400		40,610	643
Onshore Pipeline Transportation Operating Costs	5,760		6,482		12,496	13,153
General and administrative	11,283		14,832		23,504	28,053
Depreciation and amortization	55,900		28,205		102,535	55,330
Total costs and expenses	397,988		626,947		716,554	1,128,985
OPERATING INCOME	47,988		29,380		107,836	54,199
Equity in earnings of subsidiaries	0		0		0	0
Equity in earnings of equity investees	12,157		18,661		22,874	34,180
Interest Income (Expense), Net	(35,535)		(17,905)		(69,922)	(37,120)
Other income/(expense), net	0	$ 0	(17,529)	$ (17,529)		(17,529)	$ 0	$ (17,529)
Income from continuing operations before income taxes	24,610		12,607		60,788	33,730
Income tax (expense) benefit	(1,009)		(942)		(2,010)	(1,850)
NET INCOME	23,601		11,665		58,778	31,880
Net loss attributable to noncontrolling interest	126		0		252	0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	23,727		11,665		59,030	31,880
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Offshore Pipeline Transportation Services Revenues	0		0		0	0
Pipeline transportation services	0		0		0	0
Refinery services	0		0		0	0
Marine Transportation Revenues	0		0		0	0
Supply And Logistics Revenues	0		0		0	0
Total revenues	0		0		0	0
Supply and logistics costs	0		0		0	0
Marine Transportation Operating Costs	0		0		0	0
Refinery services operating costs	0		0		0	0
Offshore Pipeline Transportation Operating Costs	0		0		0	0
Onshore Pipeline Transportation Operating Costs	0		0		0	0
General and administrative	0		0		0	0
Depreciation and amortization	0		0		0	0
Total costs and expenses	0		0		0	0
OPERATING INCOME	0		0		0	0
Equity in earnings of subsidiaries	60,205		48,777		128,863	88,184
Equity in earnings of equity investees	0		0		0	0
Interest Income (Expense), Net	(35,508)		(17,887)		(69,833)	(37,079)
Other income/(expense), net	0		(19,225)			(19,225)
Income from continuing operations before income taxes	24,697		11,665		59,030	31,880
Income tax (expense) benefit	0		0		0	0
NET INCOME	24,697		11,665		59,030	31,880
Net loss attributable to noncontrolling interest	0				0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	24,697				59,030
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Offshore Pipeline Transportation Services Revenues	0		0		0	0
Pipeline transportation services	0		0		0	0
Refinery services	0		0		0	0
Marine Transportation Revenues	0		0		0	0
Supply And Logistics Revenues	0		0		0	0
Total revenues	0		0		0	0
Supply and logistics costs	0		0		0	0
Marine Transportation Operating Costs	0		0		0	0
Refinery services operating costs	0		0		0	0
Offshore Pipeline Transportation Operating Costs	0		0		0	0
Onshore Pipeline Transportation Operating Costs	0		0		0	0
General and administrative	0		0		0	0
Depreciation and amortization	0		0		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 Income (Expense), Net	0		0		0	0
Other income/(expense), net	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
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	0				0
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Offshore Pipeline Transportation Services Revenues	78,994		1,258		155,120	2,048
Pipeline transportation services	11,264		13,120		23,870	25,744
Refinery services	42,115		45,272		84,409	90,591
Marine Transportation Revenues	52,609		62,594		104,645	119,965
Supply And Logistics Revenues	256,799		529,073		446,364	930,722
Total revenues	441,781		651,317		814,408	1,169,070
Supply and logistics costs	246,360		517,230		427,393	912,064
Marine Transportation Operating Costs	34,430		35,286		67,452	66,880
Refinery services operating costs	22,167		25,081		42,613	51,300
Offshore Pipeline Transportation Operating Costs	22,044		400		39,349	643
Onshore Pipeline Transportation Operating Costs	5,480		6,574		11,920	12,812
General and administrative	11,283		14,861		23,504	28,053
Depreciation and amortization	55,275		28,249		101,285	54,045
Total costs and expenses	397,039		627,681		713,516	1,125,797
OPERATING INCOME	44,742		23,636		100,892	43,273
Equity in earnings of subsidiaries	(156)		2,099		(78)	3,486
Equity in earnings of equity investees	12,157		18,661		22,874	34,180
Interest Income (Expense), Net	3,632		3,787		7,266	7,601
Other income/(expense), net	0		1,696			1,696
Income from continuing operations before income taxes	60,375		49,879		130,954	90,236
Income tax (expense) benefit	(1,097)		(1,023)		(2,007)	(1,934)
NET INCOME	59,278		48,856		128,947	88,302
Net loss attributable to noncontrolling interest	0				0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	59,278				128,947
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Offshore Pipeline Transportation Services Revenues	0		0		0	0
Pipeline transportation services	4,986		5,813		10,531	12,257
Refinery services	1,715		5,859		2,518	7,971
Marine Transportation Revenues	0		0		0	0
Supply And Logistics Revenues	0		(3,966)		0	0
Total revenues	6,701		7,706		13,049	20,228
Supply and logistics costs	0		(3,433)		0	0
Marine Transportation Operating Costs	0		0		0	0
Refinery services operating costs	1,918		5,526		3,018	7,645
Offshore Pipeline Transportation Operating Costs	632		0		1,261	0
Onshore Pipeline Transportation Operating Costs	280		(92)		576	341
General and administrative	0		(29)		0	0
Depreciation and amortization	625		(44)		1,250	1,285
Total costs and expenses	3,455		1,928		6,105	9,271
OPERATING INCOME	3,246		5,778		6,944	10,957
Equity in earnings of subsidiaries	0		0		0	0
Equity in earnings of equity investees	0		0		0	0
Interest Income (Expense), Net	(3,659)		(3,805)		(7,355)	(7,642)
Other income/(expense), net	0		0			0
Income from continuing operations before income taxes	(413)		1,973		(411)	3,315
Income tax (expense) benefit	88		81		(3)	84
NET INCOME	(325)		2,054		(414)	3,399
Net loss attributable to noncontrolling interest	126				252
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	(199)				(162)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Offshore Pipeline Transportation Services Revenues	0		0		0	0
Pipeline transportation services	0		0		0	0
Refinery services	(2,506)		(4,807)		(3,067)	(6,114)
Marine Transportation Revenues	0		0		0	0
Supply And Logistics Revenues	0		2,111		0	0
Total revenues	(2,506)		(2,696)		(3,067)	(6,114)
Supply and logistics costs	0		2,110		0	0
Marine Transportation Operating Costs	0		0		0	0
Refinery services operating costs	(2,506)		(4,772)		(3,067)	(6,083)
Offshore Pipeline Transportation Operating Costs	0		0		0	0
Onshore Pipeline Transportation Operating Costs	0		0		0	0
General and administrative	0		0		0	0
Depreciation and amortization	0		0		0	0
Total costs and expenses	(2,506)		(2,662)		(3,067)	(6,083)
OPERATING INCOME	0		(34)		0	(31)
Equity in earnings of subsidiaries	(60,049)		(50,876)		(128,785)	(91,670)
Equity in earnings of equity investees	0		0		0	0
Interest Income (Expense), Net	0		0		0	0
Other income/(expense), net	0		0			0
Income from continuing operations before income taxes	(60,049)		(50,910)		(128,785)	(91,701)
Income tax (expense) benefit	0		0		0	0
NET INCOME	(60,049)		$ (50,910)		(128,785)	$ (91,701)
Net loss attributable to noncontrolling interest	0				0
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	$ (60,049)				$ (128,785)