Condensed Consolidating Financial Information (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 192,128	$ 208,119
Payments to acquire fixed and intangible assets	(359,504)	(336,061)
Cash distributions received from equity investees - return of investment	19,360	11,352
Investments in equity investees	(2,900)	(40,426)
Payments to Acquire Businesses, Gross	1,517,428		$ 0
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	2,571	178
Other, net	(2,137)	(4,706)
Net cash used in investing activities	(1,860,038)	(369,663)
Borrowings on senior secured credit facility	1,168,850	1,420,900
Repayments on senior secured credit facility	(705,150)	(1,668,700)
Proceeds from issuance of senior unsecured notes, including premium	1,139,718	350,000
Repayments of Unsecured Debt	(350,000)	0
Debt issuance costs	(28,361)	(11,857)
Increase (Decrease) Due from Affiliates	0	0
Proceeds from Issuance of Common Limited Partners Units	633,759	225,610
Distributions to partners/owners	(186,026)	(146,350)
Payments of Distributions To Noncontrolling Interests	(560)	0
Other, net	1,786	0
Net cash provided by financing activities	1,674,016	169,603
Net increase in cash and cash equivalents	6,106	8,059
Cash and cash equivalents at beginning of period	9,462	8,866
Cash and cash equivalents at end of period	15,568	16,925	8,866
Genesis Energy, L.P. (Parent And Co-Issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(53,478)	73,525
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	179,267	38,236
Investments in equity investees	(633,761)	(225,610)
Payments to Acquire Businesses, Gross	0
Increase (Decrease) in Due to Affiliates	(1,164,821)	(55,765)
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	(1,619,315)	(243,139)
Borrowings on senior secured credit facility	1,168,850	1,420,900
Repayments on senior secured credit facility	(705,150)	(1,668,700)
Proceeds from issuance of senior unsecured notes, including premium	1,139,718	350,000
Repayments of Unsecured Debt	(350,000)
Debt issuance costs	(28,361)	(11,857)
Increase (Decrease) Due from Affiliates	0	0
Proceeds from Issuance of Common Limited Partners Units	633,759	225,610
Distributions to partners/owners	(186,026)	(146,350)
Payments of Distributions To Noncontrolling Interests	0
Other, net	0	0
Net cash provided by financing activities	1,672,790	169,603
Net increase in cash and cash equivalents	(3)	(11)
Cash and cash equivalents at beginning of period	9	20
Cash and cash equivalents at end of period	6	9	20
Genesis Energy Finance Corporation (Co-Issuer) [Member]
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
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	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, including premium	0	0
Repayments of Unsecured Debt	0
Debt issuance costs	0	0
Increase (Decrease) Due from Affiliates	0	0
Proceeds from Issuance of Common Limited Partners Units	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	0
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	201,305	216,907
Payments to acquire fixed and intangible assets	(359,504)	(336,061)
Cash distributions received from equity investees - return of investment	19,360	11,352
Investments in equity investees	(2,900)	(40,426)
Payments to Acquire Businesses, Gross	1,517,428
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	(1,077)	3,697
Proceeds from asset sales	2,571	178
Other, net	(2,137)	(4,706)
Net cash used in investing activities	(1,861,115)	(365,966)
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes, including premium	0	0
Repayments of Unsecured Debt	0
Debt issuance costs	0	0
Increase (Decrease) Due from Affiliates	1,215,585	(78,031)
Proceeds from Issuance of Common Limited Partners Units	633,759	225,610
Distributions to partners/owners	(186,026)	(146,350)
Payments of Distributions To Noncontrolling Interests	(560)
Other, net	1,786	0
Net cash provided by financing activities	1,664,544	157,291
Net increase in cash and cash equivalents	4,734	8,232
Cash and cash equivalents at beginning of period	8,310	8,050
Cash and cash equivalents at end of period	13,044	16,282	8,050
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	51,028	25,769
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
Increase (Decrease) in Due to Affiliates	0	0
Repayments on loan to non-guarantor subsidiary	0	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, including premium	0	0
Repayments of Unsecured Debt	0
Debt issuance costs	0	0
Increase (Decrease) Due from Affiliates	(50,764)	22,266
Proceeds from Issuance of Common Limited Partners Units	0	0
Distributions to partners/owners	0	0
Payments of Distributions To Noncontrolling Interests	0
Other, net	1,111	(3,665)
Net cash provided by financing activities	(49,653)	(25,931)
Net increase in cash and cash equivalents	1,375	(162)
Cash and cash equivalents at beginning of period	1,143	796
Cash and cash equivalents at end of period	2,518	634	796
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(6,727)	(108,082)
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	(179,267)	(38,236)
Investments in equity investees	633,761	225,610
Payments to Acquire Businesses, Gross	0
Increase (Decrease) in Due to Affiliates	1,164,821	55,765
Repayments on loan to non-guarantor subsidiary	1,077	(3,697)
Proceeds from asset sales	0	0
Other, net	0	0
Net cash used in investing activities	1,620,392	239,442
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Proceeds from issuance of senior unsecured notes, including premium	0	0
Repayments of Unsecured Debt	0
Debt issuance costs	0	0
Increase (Decrease) Due from Affiliates	(1,164,821)	55,765
Proceeds from Issuance of Common Limited Partners Units	(633,759)	(225,610)
Distributions to partners/owners	186,026	146,350
Payments of Distributions To Noncontrolling Interests	0
Other, net	(1,111)	3,665
Net cash provided by financing activities	(1,613,665)	(131,360)
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	$ 0