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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
|  | Six Months Ended June 30, |
|  | 2015 |  |  | 2014 |
|  | (in thousands) |
Net cash provided from operating activities included: |  |  |  |  |  |  |  |
Income taxes paid to taxing authorities |  | $ | — |  |  | $ | 39 |
Interest paid |  |  | 73,189 |  |  |  | 89,381 |
Non-cash investing and financing activities included: |  |  |  |  |  |  |  |
Increase in asset retirement costs capitalized |  |  | 18,684 |  |  |  | 5,516 |
(Decrease) increase in accrued capital expenditures |  |  | (156,897 | ) |  |  | 15,211 |

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- References No definition available. + Details
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