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Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
American Phoenix Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Schedule of Purchase Price Allocation | The allocation of the purchase price, as presented on our Consolidated Balance Sheet, is summarized as follows:
Property and equipment | $ | 125,000 |
Intangible assets | 32,000 |
Total purchase price | $ | 157,000 |
Selected Financial Information | The following table presents selected financial information included in our Consolidated Financial Statements for the periods presented:
| Year Ended December 31,
| 2014
Revenues | $ | 3,038 |
Net income | $ | 454 |
Schedule of Pro Forma Financial Information | The table below presents selected unaudited pro forma financial information for us incorporating the historical results of the acquired M/T American Phoenix. The pro forma financial information below has been prepared as if the acquisition had been completed on January 1, 2013 and is based upon assumptions deemed appropriate by us and may not be indicative of actual results. Depreciation expense for the fixed assets acquired is calculated on a straight-line basis over an estimated useful life of approximately 30 years.
| Year Ended December 31,
| 2014 |  | 2013
Pro forma earnings data: |  |  |
Revenues from continuing operations | $ | 3,863,745 |  |  | $ | 4,153,443 |
Net Income | $ | 111,132 |  |  | $ | 90,829 |
Hornbeck Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Selected Financial Information |  | The following table presents selected financial information included in our Consolidated Financial Statements for the periods presented:
| Year Ended December 31,
| 2013
Revenues | $ | 30,424 |
Net income | $ | 7,348 |
Schedule of Pro Forma Financial Information |  | The table below presents selected unaudited pro forma financial information for us incorporating the historical results of our offshore marine transportation business. The pro forma financial information below has been prepared as if the acquisition had been completed on January 1, 2012 and is based upon assumptions deemed appropriate by us and may not be indicative of actual results. Depreciation expense for the fixed assets acquired is calculated on a straight-line basis over an estimated useful life of approximately 25 years.
| Year Ended December 31,
| 2013 |  | 2012
Pro forma earnings data: |  |  |
Revenues from continuing operations | $ | 4,177,715 |  |  | $ | 3,416,790 |
Net Income | $ | 98,846 |  |  | $ | 98,665 |
Gulf Of Mexico Crude Oil Pipeline Systems [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Selected Financial Information |  |  | The following table presents selected financial information included in our Consolidated Financial Statements for the year ended December 31, 2012:
| Year Ended December 31,
| 2012
Revenues | $ | 5,508 |
Equity in earnings of equity investees | $ | 13,118 |
Net income | $ | 15,112 |

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