Condensed Consolidating Financial Information (Condensed Consolidating Statements Of Cash Flow) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 291,054	$ 138,386	$ 189,304
Payments to acquire fixed and intangible assets	(443,482)	(343,119)	(146,456)
Cash distributions received from equity investees - return of investment	18,363	12,432	14,909
Investments in equity investees	(40,926)	(94,551)	(63,749)
Acquisitions	(157,000)	(230,880)	(205,576)
Repayments on loan to non-guarantor subsidiary	0us-gaap_RepaymentsOfDebt	0us-gaap_RepaymentsOfDebt	0us-gaap_RepaymentsOfDebt
Proceeds from Sales of Assets, Investing Activities	272	1,910	773
Payments for (Proceeds from) Other Investing Activities	1,214	1,622	1,508
Net cash used in investing activities	(623,987)	(655,830)	(401,607)
Borrowings on senior secured credit facility	1,839,900	1,593,300	1,674,400
Repayments on senior secured credit facility	(1,872,300)	(1,510,500)	(1,583,700)
Proceeds from issuance of senior unsecured notes, including premium	350,000	350,000	101,000
Credit facility and senior unsecured notes issuance fees	(11,896)us-gaap_PaymentsOfDebtIssuanceCosts	(8,157)us-gaap_PaymentsOfDebtIssuanceCosts	(7,105)us-gaap_PaymentsOfDebtIssuanceCosts
Payments of Distributions To Common Unitholders	200,461	168,441	142,383
Issuance of common units for cash, net	225,725	263,574	169,421
Other, net	(2,561)	4,748	(1,135)
Net cash provided by financing activities	333,529	515,028	212,768
Net increase in cash and cash equivalents	596	(2,416)	465
Cash and cash equivalents at beginning of period	8,866	11,282	10,817
Cash and cash equivalents at end of period	9,462	8,866	11,282
Genesis Energy, L.P. (Parent and Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(148,008)	(280,155)	(70,083)
Payments to acquire fixed and intangible assets	0	0	0
Cash distributions received from equity investees - return of investment	42,755	23,963	27,878
Investments in equity investees	(225,725)	(263,574)	(169,421)
Acquisitions	0	0	0
Repayments on loan to non-guarantor subsidiary	0	0	0
Proceeds from Sales of Assets, Investing Activities	0	0	0
Payments for (Proceeds from) Other Investing Activities	0	0	0
Net cash used in investing activities	(182,970)	(239,611)	(141,543)
Borrowings on senior secured credit facility	1,839,900	1,593,300	1,674,400
Repayments on senior secured credit facility	(1,872,300)	(1,510,500)	(1,583,700)
Proceeds from issuance of senior unsecured notes, including premium	350,000	350,000	101,000
Credit facility and senior unsecured notes issuance fees	(11,896)	(8,157)	(7,105)
Payments of Distributions To Common Unitholders	200,461	168,441	142,383
Issuance of common units for cash, net	225,725	263,574	169,421
Other, net	1	0	0
Net cash provided by financing activities	330,967	519,776	211,633
Net increase in cash and cash equivalents	(11)	10	7
Cash and cash equivalents at beginning of period	20	10	3
Cash and cash equivalents at end of period	9	20	10
Genesis Energy Finance Corporation (Co-Issuer)
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	0	0	0
Payments to acquire fixed and intangible assets	0	0	0
Cash distributions received from equity investees - return of investment	0	0	0
Investments in equity investees	0	0	0
Acquisitions	0	0	0
Repayments on loan to non-guarantor subsidiary	0	0	0
Proceeds from Sales of Assets, Investing Activities	0	0	0
Payments for (Proceeds from) Other Investing Activities	0	0	0
Net cash used in investing activities	0	0	0
Borrowings on senior secured credit facility	0	0	0
Repayments on senior secured credit facility	0	0	0
Proceeds from issuance of senior unsecured notes, including premium	0	0	0
Credit facility and senior unsecured notes issuance fees	0	0	0
Payments of Distributions To Common Unitholders	0	0	0
Issuance of common units for cash, net	0	0	0
Other, net	0	0	0
Net cash provided by financing activities	0	0	0
Net increase in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	0	0	0
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	589,643	547,333	362,855
Payments to acquire fixed and intangible assets	(442,173)	(332,024)	(137,362)
Cash distributions received from equity investees - return of investment	18,363	12,432	14,909
Investments in equity investees	(40,926)	(94,551)	(63,749)
Acquisitions	(157,000)	(230,880)	(205,576)
Repayments on loan to non-guarantor subsidiary	4,993	4,512	4,078
Proceeds from Sales of Assets, Investing Activities	272	1,910	773
Payments for (Proceeds from) Other Investing Activities	1,214	1,622	1,557
Net cash used in investing activities	(617,685)	(640,223)	(388,484)
Borrowings on senior secured credit facility	0	0	0
Repayments on senior secured credit facility	0	0	0
Proceeds from issuance of senior unsecured notes, including premium	0	0	0
Credit facility and senior unsecured notes issuance fees	0	0	0
Payments of Distributions To Common Unitholders	200,462	168,441	142,383
Issuance of common units for cash, net	225,725	263,574	169,421
Other, net	(3,070)	5,396	(623)
Net cash provided by financing activities	28,333	89,737	27,661
Net increase in cash and cash equivalents	291	(3,153)	2,032
Cash and cash equivalents at beginning of period	8,061	11,214	9,182
Cash and cash equivalents at end of period	8,352	8,061	11,214
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	8,336	6,246	25,186
Payments to acquire fixed and intangible assets	(1,309)	(11,095)	(9,094)
Cash distributions received from equity investees - return of investment	0	0	0
Investments in equity investees	0	0	0
Acquisitions	0	0	0
Repayments on loan to non-guarantor subsidiary	0	0	0
Proceeds from Sales of Assets, Investing Activities	0	0	0
Payments for (Proceeds from) Other Investing Activities	0	0	(49)
Net cash used in investing activities	(1,309)	(11,095)	(9,045)
Borrowings on senior secured credit facility	0	0	0
Repayments on senior secured credit facility	0	0	0
Proceeds from issuance of senior unsecured notes, including premium	0	0	0
Credit facility and senior unsecured notes issuance fees	0	0	0
Payments of Distributions To Common Unitholders	1,252	(9,401)	14,183
Issuance of common units for cash, net	0	0	0
Other, net	5,459	3,825	3,532
Net cash provided by financing activities	(6,711)	5,576	(17,715)
Net increase in cash and cash equivalents	316	727	(1,574)
Cash and cash equivalents at beginning of period	785	58	1,632
Cash and cash equivalents at end of period	1,101	785	58
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(158,917)	(135,038)	(128,654)
Payments to acquire fixed and intangible assets	0	0	0
Cash distributions received from equity investees - return of investment	(42,755)	(23,963)	(27,878)
Investments in equity investees	225,725	263,574	169,421
Acquisitions	0	0	0
Repayments on loan to non-guarantor subsidiary	(4,993)	(4,512)	(4,078)
Proceeds from Sales of Assets, Investing Activities	0	0	0
Payments for (Proceeds from) Other Investing Activities	0	0	0
Net cash used in investing activities	177,977	235,099	137,465
Borrowings on senior secured credit facility	0	0	0
Repayments on senior secured credit facility	0	0	0
Proceeds from issuance of senior unsecured notes, including premium	0	0	0
Credit facility and senior unsecured notes issuance fees	0	0	0
Payments of Distributions To Common Unitholders	(201,714)	(159,040)	(156,566)
Issuance of common units for cash, net	(225,725)	(263,574)	(169,421)
Other, net	(4,951)	(4,473)	(4,044)
Net cash provided by financing activities	(19,060)	(100,061)	(8,811)
Net increase in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$ 0	$ 0	$ 0

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

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Cash outflow for distributions to limited partner units.

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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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Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the 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. Includes effect from exchange rate changes.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash outflow associated with the acquisition of a controlling interest in another entity or an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The cash inflow from the issuance of common limited partners units during the period.

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The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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No definition available.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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