Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 331,729	$ 307,564
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(109,598)	(152,868)
Cash distributions received from equity investees - return of investment	18,333	26,042
Investments in equity investees	0	(2,960)
Acquisitions		0
Intercompany transfers	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	890	36,859
Net cash used in investing activities	(90,375)	(92,927)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	597,500	759,800
Repayments on senior secured credit facility	(620,600)	(638,300)
Repayment of senior unsecured notes	0	(145,170)
Net proceeds from issuance of preferred units (Note 10)	49,400	0
Debt issuance costs	0	(242)
Intercompany transfers	0	0
Distributions to partners/owners	(202,256)	(191,224)
Distributions to preferred unitholders	(24,822)	0
Contributions from noncontrolling interest	3,605	1,980
Other, net	2,128	1,356
Net cash used in financing activities	(195,045)	(211,800)
Net increase in cash and cash equivalents	46,309	2,837
Cash and cash equivalents at beginning of period	10,300	9,041
Cash and cash equivalents at end of period	56,609	11,878
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	81,990	32,474
CASH FLOWS FROM INVESTING ACTIVITIES:
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
Acquisitions		0
Intercompany transfers	168,189	182,662
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	0	0
Net cash used in investing activities	168,189	182,662
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	597,500	759,800
Repayments on senior secured credit facility	(620,600)	(638,300)
Repayment of senior unsecured notes		(145,170)
Net proceeds from issuance of preferred units (Note 10)	0
Debt issuance costs		(242)
Intercompany transfers	0	0
Distributions to partners/owners	(202,257)	(191,224)
Distributions to preferred unitholders	(24,822)
Contributions from noncontrolling interest	0	0
Other, net	0	0
Net cash used in financing activities	(250,179)	(215,136)
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	6	6
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
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	0	0
Cash distributions received from equity investees - return of investment	0	0
Intercompany transfers	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	0	0
Net cash used in investing activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Repayment of senior unsecured notes		0
Debt issuance costs		0
Intercompany transfers	0	0
Distributions to partners/owners	0	0
Distributions to preferred unitholders	0
Contributions from noncontrolling interest	0	0
Other, net	0	0
Net cash used in 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	425,780	391,406
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(53,915)	(98,997)
Cash distributions received from equity investees - return of investment	18,333	26,042
Investments in equity investees		(2,960)
Acquisitions		0
Intercompany transfers	0	0
Repayments on loan to non-guarantor subsidiary	6,132	5,541
Proceeds from asset sales	890	36,859
Net cash used in investing activities	(28,560)	(33,515)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Repayment of senior unsecured notes		0
Net proceeds from issuance of preferred units (Note 10)	0
Debt issuance costs		0
Intercompany transfers	(158,690)	(170,245)
Distributions to partners/owners	(202,257)	(191,224)
Distributions to preferred unitholders	(24,822)
Contributions from noncontrolling interest	0	0
Other, net	2,128	1,356
Net cash used in financing activities	(383,641)	(360,113)
Net increase in cash and cash equivalents	13,579	(2,222)
Cash and cash equivalents at beginning of period	4,924	5,230
Cash and cash equivalents at end of period	18,503	3,008
Reportable Legal Entities \| Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	120,191	155,954
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(55,683)	(53,871)
Cash distributions received from equity investees - return of investment	0	0
Investments in equity investees		0
Acquisitions		0
Intercompany transfers	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	0	0
Net cash used in investing activities	(55,683)	(53,871)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Repayment of senior unsecured notes		0
Net proceeds from issuance of preferred units (Note 10)	49,400
Debt issuance costs		0
Intercompany transfers	(9,499)	(12,417)
Distributions to partners/owners	(84,601)	(96,500)
Distributions to preferred unitholders	0
Contributions from noncontrolling interest	3,605	1,980
Other, net	9,317	9,913
Net cash used in financing activities	(31,778)	(97,024)
Net increase in cash and cash equivalents	32,730	5,059
Cash and cash equivalents at beginning of period	5,370	3,805
Cash and cash equivalents at end of period	38,100	8,864
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(296,232)	(272,270)
CASH FLOWS FROM INVESTING ACTIVITIES:
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
Acquisitions		0
Intercompany transfers	(168,189)	(182,662)
Repayments on loan to non-guarantor subsidiary	(6,132)	(5,541)
Proceeds from asset sales	0	0
Net cash used in investing activities	(174,321)	(188,203)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	0	0
Repayments on senior secured credit facility	0	0
Repayment of senior unsecured notes		0
Net proceeds from issuance of preferred units (Note 10)	0
Debt issuance costs		0
Intercompany transfers	168,189	182,662
Distributions to partners/owners	286,859	287,724
Distributions to preferred unitholders	24,822
Contributions from noncontrolling interest	0	0
Other, net	(9,317)	(9,913)
Net cash used in financing activities	470,553	460,473
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
Issuer [Member] \| Reportable Legal Entities
CASH FLOWS FROM INVESTING ACTIVITIES:
Investments in equity investees		0
Acquisitions		$ 0
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of preferred units (Note 10)	$ 0

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