Business Segment Information (Reconciliation of Segment Margin To Net Income) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting [Abstract]
Total Segment Margin	[1]									$ 569,571	$ 476,585	$ 347,264
Corporate general and administrative expenses										(40,905)	(61,370)	(47,065)
Depreciation, amortization and accretion										(230,563)	(155,081)	(91,397)
Interest expense										(139,947)	(100,596)	(66,639)
Adjustment to exclude distributable cash generated by equity investees not included in income and include equity in investees net income	[2]									(39,276)	(43,018)	(31,093)
Non-cash items not included in Segment Margin										(3,221)	2,809	3,506
Cash payments from direct financing leases in excess of earnings										(6,277)	(5,685)	(5,529)
Gain on basis step up on historical interest										0	332,380	0
Loss on debt extinguishment										0	(19,225)	0
Differences in timing of cash receipts for certain contractual arrangements (2)	[3]									13,253	6,359	0
Non-cash valuation allowance related to collectibility										(6,044)	0	0
Other, net										0	(6,643)	0
Income tax expense										(3,342)	(3,987)	(2,845)
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.		$ 22,118	$ 32,101	$ 23,727	$ 35,303	$ 27,434	$ 363,214	$ 11,665	$ 20,215	$ 113,249	$ 422,528	$ 106,202

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

[2] Includes distributions attributable to the quarter and received during or promptly following such quarter.

[3] Certain cash payments received from customers under certain of our minimum payment obligation contracts are not recognized as revenue under GAAP in the period in which such payments are received.