Condensed Consolidating Financial Information (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 228,397	$ 192,128
Payments to acquire fixed and intangible assets	(363,218)	(359,504)
Cash distributions received from equity investees - return of investment	16,652	19,360
Investments in equity investees	0	(2,900)
Payments to Acquire Businesses, Gross	25,394	1,517,428
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	12,208	0
Proceeds from asset sales	3,303	2,571
Other, net	185	(2,137)
Net cash used in investing activities	(356,264)	(1,860,038)
Borrowings on senior secured credit facility	883,600	1,168,850
Repayments on senior secured credit facility	(831,600)	(705,150)
Proceeds from issuance of senior unsecured notes	0	1,139,718
Repayment of senior unsecured notes	0	(350,000)
Debt issuance costs	1,578	28,361
Intercompany transfers	0	0
Issuance of common units for cash, net	298,051	633,759
Distributions to partners/owners	(227,454)	(186,026)
Payments of Distributions To Noncontrolling Interests	0	(560)
Other, net	(600)	1,786
Net cash provided by financing activities	120,419	1,674,016
Net increase in cash and cash equivalents	(7,448)	6,106
Cash and cash equivalents at beginning of period	10,895	9,462
Cash and cash equivalents at end of period	3,447	15,568
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	122,884	(53,478)
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	179,267
Investments in equity investees	(298,051)	(633,761)
Payments to Acquire Businesses, Gross	0	0
Increase (Decrease) in Due to Affiliates	54,148	(1,164,821)
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	(243,903)	(1,619,315)
Borrowings on senior secured credit facility	883,600	1,168,850
Repayments on senior secured credit facility	(831,600)	(705,150)
Proceeds from issuance of senior unsecured notes		1,139,718
Repayment of senior unsecured notes		(350,000)
Debt issuance costs	1,578	28,361
Intercompany transfers	0	0
Issuance of common units for cash, net	298,051	633,759
Distributions to partners/owners	(227,454)	(186,026)
Payments of Distributions To Noncontrolling Interests		0
Other, net	0	0
Net cash provided by financing activities	121,019	1,672,790
Net increase in cash and cash equivalents	0	(3)
Cash and cash equivalents at beginning of period	6	9
Cash and cash equivalents at end of period	6	6
Reportable Legal Entities | Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees	0	0
Payments to Acquire Businesses, Gross	0	0
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	0	0
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	0	0
Issuance of common units for cash, net	0	0
Distributions to partners/owners	0	0
Payments of Distributions To Noncontrolling Interests		0
Other, net	0	0
Net cash provided by financing activities	0	0
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Reportable Legal Entities | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	310,723	201,305
Payments to acquire fixed and intangible assets	(363,218)	(359,504)
Cash distributions received from equity investees - return of investment	16,652	19,360
Investments in equity investees	0	(2,900)
Payments to Acquire Businesses, Gross	25,394	1,517,428
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	4,526	(1,077)
Proceeds from Contribution in Aid of Construction	12,208
Proceeds from asset sales	3,303	2,571
Other, net	185	(2,137)
Net cash used in investing activities	(351,738)	(1,861,115)
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	(35,144)	1,215,585
Issuance of common units for cash, net	298,051	633,759
Distributions to partners/owners	(227,454)	(186,026)
Payments of Distributions To Noncontrolling Interests		(560)
Other, net	(600)	1,786
Net cash provided by financing activities	34,853	1,664,544
Net increase in cash and cash equivalents	(6,162)	4,734
Cash and cash equivalents at beginning of period	8,288	8,310
Cash and cash equivalents at end of period	2,126	13,044
Reportable Legal Entities | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	6,781	51,028
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees	0	0
Payments to Acquire Businesses, Gross	0	0
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	0	0
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	(19,004)	(50,764)
Issuance of common units for cash, net	0	0
Distributions to partners/owners	0	0
Payments of Distributions To Noncontrolling Interests		0
Other, net	10,937	1,111
Net cash provided by financing activities	(8,067)	(49,653)
Net increase in cash and cash equivalents	(1,286)	1,375
Cash and cash equivalents at beginning of period	2,601	1,143
Cash and cash equivalents at end of period	1,315	2,518
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(211,991)	(6,727)
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	(179,267)
Investments in equity investees	298,051	633,761
Payments to Acquire Businesses, Gross	0	0
Increase (Decrease) in Due to Affiliates	(54,148)	1,164,821
Repayments on loan to non-guarantor subsidiary	(4,526)	1,077
Proceeds from Contribution in Aid of Construction	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	239,377	1,620,392
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes		0
Repayment of senior unsecured notes		0
Debt issuance costs	0	0
Intercompany transfers	54,148	(1,164,821)
Issuance of common units for cash, net	(298,051)	(633,759)
Distributions to partners/owners	227,454	186,026
Payments of Distributions To Noncontrolling Interests		0
Other, net	(10,937)	(1,111)
Net cash provided by financing activities	(27,386)	(1,613,665)
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0