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Business Segment Information (Schedule Of Total Assets By Reportable Segment) (Details) - USD ($) $ in Thousands | Mar. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets | $ 3,272,140 | $ 3,230,374 |
Pipeline Transportation [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets | 491,072 | 460,012 |
Offshore Pipeline Transportation [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets |  | 637,412 | $ 645,668
Refinery Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets | 401,164 | 403,703 |
Marine Transportation [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets |  | 744,797 | $ 745,128
Supply And Logistics [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets | 934,699 | 907,189 |
Other Assets [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total consolidated assets | $ 62,996 | $ 68,674 |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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