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Condensed Consolidating Financial Information (Condensed Consolidating Statement Of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | $ 64,605 | $ 41,106 |  |
Payments to acquire fixed and intangible assets | (61,292) | (118,252) |  |
Cash distributions received from equity investees - return of investment | 5,518 | 5,788 |  |
Investments in equity investees | 0 | (1,135) |  |
Payments to Acquire Businesses, Gross | 0 | (25,394) |  |
Increase (Decrease) in Due to Affiliates | 0 | 0 |  |
Repayments on loan to non-guarantor subsidiary | 0 | 0 |  |
Proceeds from Contribution in Aid of Construction | 124 | 4,088 |  |
Proceeds from asset sales | 1,234 | 224 |  |
Other, net | 0 | 130 |  |
Net cash used in investing activities | (54,416) | (134,551) |  |
Borrowings on senior secured credit facility | 216,700 | 319,400 |  |
Repayments on senior secured credit facility | (284,900) | (154,400) |  |
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 | 140,968 | 0 |  |
Distributions to partners/owners | (83,765) | (72,087) |  |
Payments of Distributions To Noncontrolling Interests |  | 0 |  | $ 0
Other, net | 4,552 | 1,948 |  |
Net cash provided by financing activities | (6,445) | 94,861 |  |
Net increase in cash and cash equivalents | 3,744 | 1,416 |  |
Cash and cash equivalents at beginning of period | 7,029 | 10,895 | $ 10,895 |
Cash and cash equivalents at end of period | 10,773 | 12,311 | 7,029 | 10,895
Reportable Legal Entities | Genesis Energy, L.P. (Parent and Co-Issuer) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | 42,623 | 33,558 |  |
Payments to acquire fixed and intangible assets | 0 | 0 |  |
Cash distributions received from equity investees - return of investment | 0 | 0 |  |
Investments in equity investees | (140,968) | 0 |  |
Payments to Acquire Businesses, Gross | 0 | 0 |  |
Increase (Decrease) in Due to Affiliates | 109,342 | (126,471) |  |
Repayments on loan to non-guarantor subsidiary | 0 | 0 |  |
Proceeds from Contribution in Aid of Construction | 0 | 0 |  |
Proceeds from asset sales | 0 | 0 |  |
Other, net | 0 | 0 |  |
Net cash used in investing activities | (31,626) | (126,471) |  |
Borrowings on senior secured credit facility | 216,700 | 319,400 |  |
Repayments on senior secured credit facility | (284,900) | (154,400) |  |
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 | 140,968 | 0 |  |
Distributions to partners/owners | (83,765) | (72,087) |  |
Payments of Distributions To Noncontrolling Interests |  | 0 | 0 |
Other, net | 0 | 0 |  |
Net cash provided by financing activities | (10,997) | 92,913 |  |
Net increase in cash and cash equivalents | 0 | 0 |  |
Cash and cash equivalents at beginning of period | 6 | 6 | 6 |
Cash and cash equivalents at end of period | 6 | 6 | 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 | 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 | 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 | 0 |
Cash and cash equivalents at end of period | 0 | 0 | 0 | 0
Reportable Legal Entities | Guarantor Subsidiaries |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | 98,588 | 70,795 |  |
Payments to acquire fixed and intangible assets | (61,292) | (118,252) |  |
Cash distributions received from equity investees - return of investment | 5,518 | 5,788 |  |
Investments in equity investees | 0 | (1,135) |  |
Payments to Acquire Businesses, Gross | 0 | (25,394) |  |
Increase (Decrease) in Due to Affiliates | 0 | 0 |  |
Repayments on loan to non-guarantor subsidiary | 1,627 | 1,471 |  |
Proceeds from Contribution in Aid of Construction | 124 | 4,088 |  |
Proceeds from asset sales | 1,234 | 224 |  |
Other, net | 0 | 130 |  |
Net cash used in investing activities | (52,789) | (133,080) |  |
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 | (104,276) | 133,203 |  |
Issuance of common units for cash, net | 140,968 | 0 |  |
Distributions to partners/owners | (83,765) | (72,087) |  |
Payments of Distributions To Noncontrolling Interests |  | 0 | 0 |
Other, net | 4,552 | 1,948 |  |
Net cash provided by financing activities | (42,521) | 63,064 |  |
Net increase in cash and cash equivalents | 3,278 | 779 |  |
Cash and cash equivalents at beginning of period | 6,360 | 8,288 | 8,288 |
Cash and cash equivalents at end of period | 9,638 | 9,067 | 6,360 | 8,288
Reportable Legal Entities | Non-Guarantor Subsidiaries |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | 2,007 | 3,661 |  |
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 | 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 | (5,066) | (6,733) |  |
Issuance of common units for cash, net | 0 | 0 |  |
Distributions to partners/owners | 0 | 0 |  |
Payments of Distributions To Noncontrolling Interests |  | 0 | 0 |
Other, net | 3,525 | 3,709 |  |
Net cash provided by financing activities | (1,541) | (3,024) |  |
Net increase in cash and cash equivalents | 466 | 637 |  |
Cash and cash equivalents at beginning of period | 663 | 2,601 | 2,601 |
Cash and cash equivalents at end of period | 1,129 | 3,238 | 663 | 2,601
Eliminations |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Net cash provided by operating activities | (78,613) | (66,908) |  |
Payments to acquire fixed and intangible assets | 0 | 0 |  |
Cash distributions received from equity investees - return of investment | 0 | 0 |  |
Investments in equity investees | 140,968 | 0 |  |
Payments to Acquire Businesses, Gross | 0 | 0 |  |
Increase (Decrease) in Due to Affiliates | (109,342) | 126,471 |  |
Repayments on loan to non-guarantor subsidiary | (1,627) | (1,471) |  |
Proceeds from Contribution in Aid of Construction | 0 | 0 |  |
Proceeds from asset sales | 0 | 0 |  |
Other, net | 0 | 0 |  |
Net cash used in investing activities | 29,999 | 125,000 |  |
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 | 109,342 | (126,470) |  |
Issuance of common units for cash, net | (140,968) | 0 |  |
Distributions to partners/owners | 83,765 | 72,087 |  |
Payments of Distributions To Noncontrolling Interests |  | 0 | 0 |
Other, net | (3,525) | (3,709) |  |
Net cash provided by financing activities | 48,614 | (58,092) |  |
Net increase in cash and cash equivalents | 0 | 0 |  |
Cash and cash equivalents at beginning of period | 0 | 0 | 0 |
Cash and cash equivalents at end of period | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3098-108585 + Details
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- Definition 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. + References No definition available. + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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