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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
| Year Ended December 31, |
| 2017 |  |  | 2016 |  |  | 2015 |
| (in thousands) |
Net cash provided from operating activities included: |  |  |  |  |  |  |  |  |  |  |
Income taxes (refunded from) paid to taxing authorities | $ | (1,024 | ) |  | $ | (102 | ) |  | $ | 100 |
Interest paid |  | 179,431 |  |  |  | 159,875 |  |  |  | 168,826 |
Non-cash investing and financing activities included (a): |  |  |  |  |  |  |  |  |  |  |
Asset retirement costs capitalized, net | $ | 20,245 |  |  | $ | (24,064 | ) |  | $ | 22,184 |
Increase (decrease) in accrued capital expenditures |  | 71,739 |  |  |  | 61,419 |  |  |  | (225,455 | )
| (a) | For additional information on non-cash investing activities associated with the MRD Merger, see Note 3.

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