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Acquisitions (Schedule Of Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Basic and diluted earnings per unit: |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership Unit, Basic, Net of Tax | $ 0.24 | $ 3.38 | $ 0.12 | $ 0.21 | $ 0.28 | $ 0.33 | $ 0.24 | $ 0.34 |  |  |
Business Acquisition Pro Forma Earnings Per Unit Basic And Diluted |  |  |  |  |  |  |  |  | $ 3.91 | $ 1.32 | $ 0.86
Enterprise Offshore Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Pro forma earnings data: |  |  |  |  |  |  |  |  |  |  |
Revenues from continuing operations |  |  |  |  |  |  |  |  | $ 2,421,989 | $ 4,135,964 | $ 4,372,827
Net income |  |  |  |  |  |  |  |  | $ 425,363 | 132,682 | 81,287
American Phoenix Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Pro forma earnings data: |  |  |  |  |  |  |  |  |  |  |
Revenues from continuing operations |  |  |  |  |  |  |  |  |  | 3,863,745 | 4,153,443
Net income |  |  |  |  |  |  |  |  |  | $ 111,132 | 90,829
Hornbeck Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |
Pro forma earnings data: |  |  |  |  |  |  |  |  |  |  |
Revenues from continuing operations |  |  |  |  |  |  |  |  |  |  | 4,177,715
Net income |  |  |  |  |  |  |  |  |  |  | $ 98,846

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