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Business Segment Information (Schedule Of Segment Information) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) segment | Jun. 30, 2016 USD ($)
Segment Reporting [Abstract] |  |  |  |
Number of Reportable Segments | segment |  |  | 4 |
Segment Reporting Information [Line Items] |  |  |  |
Segment margin | $ 134,000 | $ 142,486 | $ 272,645 | $ 287,367
Total revenues | 406,723 | 445,976 | 822,214 | 824,390
Offshore pipeline transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 77,638 | 78,994 | 162,766 | 155,120
Refinery services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 43,068 | 41,324 | 88,114 | 83,860
Marine transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 53,202 | 52,609 | 103,504 | 104,645
Onshore facilities and transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 232,815 | 273,049 | 467,830 | 480,765
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment margin | 134,000 | 142,486 | 272,645 | 287,367
Capital Expenditures | 57,850 | 115,521 | 116,837 | 241,679
External customers | 406,723 | 445,976 | 822,214 | 824,390
Operating Segments | Offshore pipeline transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment margin | 78,211 | 84,282 | 165,300 | 162,900
Capital Expenditures | 3,903 | 2,373 | 6,142 | 31,198
External customers | 78,577 | 76,829 | 163,982 | 152,955
Operating Segments | Refinery services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment margin | 16,337 | 19,861 | 33,833 | 41,060
Capital Expenditures | 432 | 832 | 945 | 1,157
External customers | 45,210 | 43,618 | 92,481 | 88,368
Operating Segments | Marine transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment margin | 14,156 | 18,082 | 27,119 | 36,998
Capital Expenditures | 11,132 | 27,562 | 20,665 | 35,991
External customers | 49,311 | 50,964 | 97,515 | 101,624
Operating Segments | Onshore facilities and transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment margin | 25,296 | 20,261 | 46,393 | 46,409
Capital Expenditures | 42,383 | 84,754 | 89,085 | 173,333
External customers | 233,625 | 274,565 | 468,236 | 481,443
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Intersegment | 0 | 0 | 0 | 0
Intersegment Eliminations | Offshore pipeline transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Intersegment | (939) | 2,165 | (1,216) | 2,165
Intersegment Eliminations | Refinery services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Intersegment | (2,142) | (2,294) | (4,367) | (4,508)
Intersegment Eliminations | Marine transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Intersegment | 3,891 | 1,645 | 5,989 | 3,021
Intersegment Eliminations | Onshore facilities and transportation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Intersegment | $ (810) | $ (1,516) | $ (406) | $ (678)

X
- Definition Capital expenditures include both maintenance and growth capital expenditures, such as fixed asset additions (including enhancements to existing facilities and construction of internal growth projects) as well as acquisitions of businesses and interests in equity investees. + References No definition available. + Details
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- Definition Revenues less product costs, operating expenses (excluding non-cash charges such as depreciation and amortization), and segment general and administrative expenses, plus our equity in distributable cash generated by our equity investees. Also excludes the non-cash effects of our stock appreciation rights compensation plan and includes the non-income portion of payments received under direct financing leases. + References No definition available. + Details
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