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Acquisitions (Narrative) (Details) (USD $) | 0 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 1 Months Ended |  | 12 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  |  |  |  |  |  |  |  |  | 12 Months Ended
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Dec. 28, 2010 | Jul. 31, 2011 | Nov. 30, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Nov. 23, 2010 Cameron Highway Oil Pipeline Company [Member] | Dec. 31, 2010 Cameron Highway Oil Pipeline Company [Member] Mi | Aug. 31, 2011 FMT Black Oil Barge Transportation Business [Member] | Dec. 31, 2011 FMT Black Oil Barge Transportation Business [Member] | Aug. 31, 2011 FMT Black Oil Barge Transportation Business Fuel Inventory And Other Cost [Member] | Nov. 30, 2011 Garco Refinery [Member] Mi | Nov. 30, 2011 Garco Refinery Petroleum Inventories [Member] | Dec. 31, 2011 FMT Lease [Member] FMT Black Oil Barge Transportation Business [Member] | Sep. 30, 2010 DG Marine [Member] | Dec. 31, 2010 DG Marine [Member] | Jul. 31, 2010 DG Marine [Member] | Dec. 31, 2011 Poseidon Oil Pipeline Company, L.L.C. [Member] Mi | Dec. 31, 2011 Odyssey Pipeline L.L.C. [Member] Mi | Dec. 31, 2011 Eugene Island Pipeline System [Member] Mi In | Dec. 31, 2010 Minimum [Member] Cameron Highway Oil Pipeline Company [Member] In | Nov. 30, 2011 Minimum [Member] Garco Refinery [Member] In | Dec. 31, 2011 Minimum [Member] Poseidon Oil Pipeline Company, L.L.C. [Member] In | Dec. 31, 2011 Minimum [Member] Odyssey Pipeline L.L.C. [Member] In | Dec. 31, 2010 Maximum [Member] Cameron Highway Oil Pipeline Company [Member] In | Nov. 30, 2011 Maximum [Member] Garco Refinery [Member] In | Dec. 31, 2011 Maximum [Member] Poseidon Oil Pipeline Company, L.L.C. [Member] In | Dec. 31, 2011 Maximum [Member] Odyssey Pipeline L.L.C. [Member] In | Jul. 31, 2010 TD Marine LLC [Member] DG Marine [Member] | Dec. 31, 2010 Enterprise Products Partners, L.P. [Member] Cameron Highway Oil Pipeline Company [Member] | Dec. 31, 2011 Barges [Member] DG Marine [Member] FMT Black Oil Barge Transportation Business [Member] | Dec. 31, 2011 Push/Tow Boats [Member] DG Marine [Member] FMT Black Oil Barge Transportation Business [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interest acquired |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective date of acquisition |  |  |  |  |  |  |  |  | August 2011 |  |  | November 2011 |  |  |  |  |  | July 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of acquired entity |  |  |  |  |  |  | $ 330,000,000 |  |  | $ 143,500,000 | $ 2,500,000 | $ 20,000,000 | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price adjustments |  |  |  |  |  |  | 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of units for cash, shares |  |  |  |  |  |  |  | 5,175,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of barges acquired |  |  |  |  |  |  |  |  |  | 30 |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of push boats acquired |  |  |  |  |  |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expanded fleet of barges |  |  |  |  |  |  |  |  |  | 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 | 8
Price per share of common units issued |  | $ 26.30 | $ 23.58 |  |  |  | $ 23.58 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of senior unsecured notes |  |  |  |  | 250,000,000 |  |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
General Partners' interest percentage | 2.00% |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common units and general partner contribution net of issuance costs |  |  |  |  |  |  |  | 119,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pipeline capacity, barrels per day |  |  |  |  | 500,000 |  |  |  |  |  |  | 3,500 |  |  |  |  |  | 400,000 | 300,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |
Barge capacity capable of transporting crude oil |  |  |  |  |  |  |  |  |  | 750,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  | 90.00% |  |  |  |  | 49.00% | 28.00% | 29.00% | 23.00% |  |  |  |  |  |  |  |  |  |  |  |
Pipeline length, in miles |  |  |  |  |  |  |  | 380 |  |  |  | 300 |  |  |  |  |  | 367 | 120 | 183 |  |  |  |  |  |  |  |  |  |  |  |
Pipeline diameter, in inches |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 | 24 | 3 | 16 | 12 | 30 | 6 | 24 | 20 |  |  |  |
Transaction costs related to business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pay off of outstanding principal balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification of the noncontrolling interest to partners capital account in business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  | 35,767,000 | 22,924,000 | 13,660,000 |  |  |  |  |  |  |  |  | 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in partners' capital due to acquisitions |  |  |  |  | 26,288,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contributions from partners' capital |  |  | 2,490,000 |  | 2,541,000 | 9,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in capital due to acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for acquisition |  |  |  |  |  |  |  | 330,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,500,000 |  |  |
Proceeds received from offering, net of costs |  | $ 184,969,000 | $ 118,837,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Monetary value of the issuance of new units of limited partnership interest in a public offering, net of offering costs. This is a parenthetical disclosure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187171-122770 + Details
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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow to pay off an obligation 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 either short term or long term maturity. + References Reference 1: 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=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The dollar amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section H + Details
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