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v3.20.4

Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
| Year Ended December 31, |
| 2020 |  |  | 2019 |  |  | 2018 |
| (in thousands) |
Net cash provided from operating activities included: |  |  |  |  |  |  |  |  |  |  |
Income taxes refunded from taxing authorities | $ | 343 |  |  | $ | — |  |  | $ | 7,521 |
Interest paid |  | (168,471 | ) |  |  | (189,443 | ) |  |  | (207,433 | )
Non-cash investing and financing activities included: |  |  |  |  |  |  |  |  |  |  |
Asset retirement costs capitalized, net | $ | 2,610 |  |  | $ | 11,193 |  |  | $ | 28,826 |
Decrease in accrued capital expenditures |  | (23,625 | ) |  |  | (20,104 | ) |  |  | (119,021 | )

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