Business Segment Information (Reconciliation of Segment Margin to (Loss) Income from Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting [Abstract]
Total Segment Margin	$ 146,514	$ 141,340	$ 419,159	$ 428,707
Corporate general and administrative expenses	(18,230)	(10,420)	(33,694)	(32,269)
Depreciation, depletion, amortization and accretion	(66,436)	(57,103)	(184,213)	(168,491)
Interest expense	(47,388)	(34,735)	(122,117)	(104,657)
Adjustment to exclude distributable cash generated by equity investees not included in income and include equity in investees net income (1)	(7,136)	(9,063)	(25,566)	(30,818)
Non-cash items not included in Segment Margin	(4,788)	993	(6,218)	(3,366)
Cash payments from direct financing leases in excess of earnings	(1,751)	(1,586)	(5,127)	(4,645)
Differences in timing of cash receipts for certain contractual arrangements	5,847	3,624	11,694	9,629
Gain on sale of assets	0	0	26,684	0
Non-cash provision for leased items no longer in use	0	0	(12,589)	0
Income tax expense	(320)	(949)	(878)	(2,959)
NET INCOME ATTRIBUTABLE TO GENESIS ENERGY, L.P.	$ 6,312	$ 32,101	$ 67,135	$ 91,131