Condensed Consolidating Financial Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 195,610	$ 150,816
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(68,666)	(110,970)
Cash distributions received from equity investees - return of investment	10,811	17,828
Payments to Acquire Equity Method Investments	0	395
Acquisitions		0
Intercompany transfers	0	0
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	861	1,192
Net cash used in investing activities	(56,994)	(92,345)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	387,000	543,100
Repayments on senior secured credit facility	(390,100)	(336,000)
Repayment of senior unsecured notes	0	(145,170)
Debt issuance costs	0	(224)
Intercompany transfers	0	0
Distributions to common unitholders	(134,838)	(126,257)
Distributions to preferred unitholders	(6,138)	0
Contributions from noncontrolling interest	1,230	1,320
Other, net	3,509	3,565
Net cash used in financing activities	(139,337)	(59,666)
Net decrease in cash and cash equivalents	(721)	(1,195)
Cash and cash equivalents at beginning of period	10,300	9,041
Cash and cash equivalents at end of period	9,579	7,846
Reportable Legal Entities \| Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	33,704	9,724
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
Payments to Acquire Equity Method Investments		0
Acquisitions		0
Intercompany transfers	110,372	54,827
Repayments on loan to non-guarantor subsidiary	0	0
Proceeds from asset sales	0	0
Net cash used in investing activities	110,372	54,827
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	387,000	543,100
Repayments on senior secured credit facility	(390,100)	(336,000)
Repayment of senior unsecured notes		(145,170)
Debt issuance costs		(224)
Intercompany transfers	0	0
Distributions to common unitholders	(134,838)	(126,257)
Distributions to preferred unitholders	(6,138)
Contributions from noncontrolling interest	0	0
Other, net	0	0
Net cash used in financing activities	(144,076)	(64,551)
Net decrease 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 common unitholders	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 decrease 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	292,202	255,552
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(68,666)	(110,970)
Cash distributions received from equity investees - return of investment	10,811	17,828
Payments to Acquire Equity Method Investments		395
Acquisitions		0
Intercompany transfers	0	0
Repayments on loan to non-guarantor subsidiary	4,036	3,647
Proceeds from asset sales	861	1,192
Net cash used in investing activities	(52,958)	(88,698)
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	(103,355)	(46,605)
Distributions to common unitholders	(134,838)	(126,257)
Distributions to preferred unitholders	(6,138)
Contributions from noncontrolling interest	0	0
Other, net	3,509	3,565
Net cash used in financing activities	(240,822)	(169,297)
Net decrease in cash and cash equivalents	(1,578)	(2,443)
Cash and cash equivalents at beginning of period	8,968	8,340
Cash and cash equivalents at end of period	7,390	5,897
Reportable Legal Entities \| Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	380	1,494
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
Payments to Acquire Equity Method Investments		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	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	(7,017)	(8,222)
Distributions to common unitholders	0	0
Distributions to preferred unitholders	0
Contributions from noncontrolling interest	1,230	1,320
Other, net	6,264	6,656
Net cash used in financing activities	477	(246)
Net decrease in cash and cash equivalents	857	1,248
Cash and cash equivalents at beginning of period	1,326	695
Cash and cash equivalents at end of period	2,183	1,943
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(130,676)	(115,954)
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
Payments to Acquire Equity Method Investments		0
Acquisitions		0
Intercompany transfers	(110,372)	(54,827)
Repayments on loan to non-guarantor subsidiary	(4,036)	(3,647)
Proceeds from asset sales	0	0
Net cash used in investing activities	(114,408)	(58,474)
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	110,372	54,827
Distributions to common unitholders	134,838	126,257
Distributions to preferred unitholders	6,138
Contributions from noncontrolling interest	0	0
Other, net	(6,264)	(6,656)
Net cash used in financing activities	245,084	174,428
Net decrease 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:
Payments to Acquire Equity Method Investments		0
Acquisitions		$ 0

Cash distributions from joint ventures during the period that constitute a return of investment.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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