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Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Net cash provided from operating activities included: |  |  |
Income taxes refunded from taxing authorities | $ 2,661 | $ 343 |
Interest paid | (175,195) | (145,319) |
Non-cash investing and financing activities included: |  |  |
Increase in asset retirement costs capitalized | 2,879 | 4,587 | $ 2,610
Increase (decrease) in accrued capital expenditures | $ 11,373 | $ (38,942) |

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