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Acquisition (Schedule of Pro Forma Information) (Details) (Hornbeck Acquisition [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2014
Hornbeck Acquisition [Member] |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Revenues | $ 1,101,676 | $ 3,216,680
Net Income | $ 24,294 | $ 81,780

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