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Summary of Significant Accounting Policies (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items] |  |  |
Impairment of intangible assets | $ 0 | $ 0 | $ 0
Impairment of goodwill | $ 0 | $ 0 | $ 0
Minimum [Member] | Crude oil pipelines and natural gas pipelines and related assets |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 5 years |  |
Minimum [Member] | Marine Vessels [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 20 years |  |
Minimum [Member] | Machinery and equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 10 years |  |
Minimum [Member] | Transportation equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 3 years |  |
Minimum [Member] | Building And Improvements [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 3 years |  |
Maximum [Member] | Crude oil pipelines and natural gas pipelines and related assets |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 40 years |  |
Maximum [Member] | Marine Vessels [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 30 years |  |
Maximum [Member] | Machinery and equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 20 years |  |
Maximum [Member] | Transportation equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 7 years |  |
Maximum [Member] | Building And Improvements [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 10 years |  |
Poseidon Oil Pipeline Company [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity investment, ownership percentage | 64.00% |  |
Neptune Pipeline Company LLC [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity investment, ownership percentage | 25.70% |  |
Odyssey Pipeline L.L.C. [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity investment, ownership percentage | 29.00% |  |

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- Definition Summary Of Significant Accounting Policies [Line Items] + References No definition available. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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