Business Segment Information (Reconciliation Of Segment Margin To (Loss) Income) (Details) - USD ($) $ in Thousands		3 Months Ended				12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013		Nov. 13, 2014
Segment Reporting Information [Line Items]
Capital Expenditures	[1]					$ 2,007,611	$ 644,548	$ 704,205
Segment margin	[2]					476,585	347,264	280,360
Corporate general and administrative expenses						(61,370)	(47,065)	(43,353)
Depreciation and amortization						150,140	90,908	64,784
Interest expense						(100,596)	(66,639)	(48,583)
Distributable cash from equity investees in excess of equity in earnings						(43,018)	(31,093)	(23,889)	[3]
Non-cash items not included in segment margin						4,227	3,017	(7,551)
Cash payments from direct financing leases in excess of earnings						(5,685)	(5,529)	(5,110)
Gain on basis step up on historical interest						332,380	0	0
Gains (Losses) on Extinguishment of Debt				$ (19,225)		(19,225)	0	0
Other, Net Items Included in Segment Margin						(6,643)	0	2,105
Income tax expense						(3,987)	(2,845)	(845)	[4]
Discontinued Operations for Segment Margin Reconciliation						0	0	(2,241)
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.		$ 27,434	$ 363,214	$ 11,665	$ 20,215	422,528	106,202	86,109
Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Capital Expenditures						235,069	46,611	130,787	[1]
Segment margin						58,919	61,231	$ 64,349	[2]
SEKCO [Member] | Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Capital Expenditures						$ 2,500	$ 36,100
American Phoenix Acquisition [Member]
Segment Reporting Information [Line Items]
Business Acquisition, Transaction Costs										$ 157,000

[1] Capital expenditures include maintenance and growth capital expenditures, such as fixed asset additions (including enhancements to existing facilities and construction of growth projects) as well as acquisitions of businesses and contributions to equity investees related to same. In addition to construction of growth projects, capital spending in our offshore pipeline transportation segment included $1.5 billion during the year ended December 31, 2015 to fund our Enterprise acquisition. Capital spending in this segment also included $2.5 million and $36.1 million during the years ended December 31, 2015 and December 31, 2014 representing capital contributions to our SEKCO pipeline to fund our share of the construction costs for its pipeline (as prior to our Enterprise acquisition in July 2015, we owned a 50% interest in the SEKCO pipeline with Enterprise owning the remaining 50%). During 2014, capital spending in our marine transportation segment included $157 million for our purchase of the M/T American Phoenix. During 2013, capital spending in our marine segment also included $230.9 million for the acquisition of our offshore marine transportation assets.

[2] A reconciliation of Segment Margin to net income attributable to Genesis Energy, L.P. for each year is presented below.

[3] (1) Includes distributions attributable to the quarter and received during or promptly following such quarter.

[4] (1)Our discontinued operations had no income tax benefit or expense in any period presented.