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Acquisitions (Narrative) (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 24, 2015 USD ($) platform | Jul. 23, 2015 USD ($) | Jul. 22, 2015 USD ($) $ / shares shares | Apr. 10, 2015 USD ($) $ / shares shares | Nov. 13, 2014 USD ($) | Sep. 26, 2014 USD ($) $ / shares shares | Sep. 16, 2013 USD ($) $ / shares shares | Dec. 31, 2015 USD ($) shares | Dec. 31, 2014 USD ($) shares | Dec. 31, 2013 USD ($) | Jul. 22, 2013 USD ($) Tug_Boats Barges
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common units, issued | shares |  |  | 10,350,000 | 4,600,000 |  | 4,600,000 | 5,750,000 | 109,979,218 | 95,029,218 |  |
Asset Retirement Obligation, Liabilities Incurred |  |  |  |  |  |  |  | $ 158,230 | $ 0 |  |
Asset Retirement Obligation |  |  |  |  |  |  |  | 188,662 | 14,790 | $ 14,332 |
Partners' Capital Account, Public Sale of Units Net of Offering Costs |  |  | $ 437,164 | $ 198,168 |  | $ 225,725 | $ 263,574 |  |  |  |
Price per share of common units issued | $ / shares |  |  | $ 43.77 | $ 44.42 |  | $ 50.71 | $ 47.51 |  |  |  |
Proceeds from issuance of senior unsecured notes, including premium |  |  |  |  |  |  |  | 1,139,718 | 350,000 | 350,000 |
Cash paid for acquisition |  |  |  |  |  |  |  | 1,520,299 | $ 157,000 | $ 230,880 |
Property, Plant and Equipment, Estimated Useful Lives |  |  |  |  |  |  |  |  | 25 |  |
Enterprise Offshore Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 19 years |  |  |  |  |  |  |  |  |  |
Business Acquisition, Effective Date of Acquisition | Jul. 24, 2015 |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  | $ 15,000 |  |  |
Transaction costs related to business acquisition | $ 1,500,000 |  |  |  |  |  |  |  |  |  |
Number of Hubs | platform | 6 |  |  |  |  |  |  |  |  |  |
American Phoenix Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Effective Date of Acquisition |  |  |  |  | Nov. 13, 2014 |  |  |  |  |  |
Transaction costs related to business acquisition |  |  |  |  | $ 157,000 |  |  |  |  |  |
Hornbeck Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of barges acquired | Barges |  |  |  |  |  |  |  |  |  |  | 9
Business Acquisition, Tug Boats Acquired | Tug_Boats |  |  |  |  |  |  |  |  |  |  | 9
Transaction costs related to business acquisition |  |  |  |  |  |  |  |  |  |  | $ 230,900
Poseidon Oil Pipeline Company [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  | 64.00% |  |  |
Poseidon Oil Pipeline Company [Member] | Enterprise Offshore Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage | 36.00% |  |  |  |  |  |  |  |  |  |
Odyssey Pipeline L.L.C. [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  | 29.00% |  |  |
SEKCO [Member] | Enterprise Offshore Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage | 50.00% |  |  |  |  |  |  |  |  |  |
Cameron Highway Oil Pipeline Company [Member] | Enterprise Offshore Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage | 50.00% |  |  |  |  |  |  |  |  |  |
Independence Hub, LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  | 20.00% |  |  |
Ownership percentage |  |  |  |  |  |  |  | 80.00% |  |  |
Six Point Seven Five Percentage Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 750,000 |  |  |  |  |  | $ 750,000 | $ 0 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 6.75% |  |  |
Proceeds from Debt, Net of Issuance Costs |  | $ 728,600 |  |  |  |  |  |  |  |  |

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