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Consolidation and Nature of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash paid during the period for: |  |
Income taxes, net of refunds | $ (827) | $ (3,002)
Interest, net of amounts capitalized | 53,885 | 53,723
Significant non-cash investing and financing activities: |  |
Accrued capital expenditures | 79,597 | 100,868
Right-of-use operating lease assets obtained in exchange for operating lease liabilities | 785 | 2,311
APS |  |
Cash paid during the period for: |  |
Income taxes, net of refunds | 0 | 0
Interest, net of amounts capitalized | 53,153 | 52,034
Significant non-cash investing and financing activities: |  |
Accrued capital expenditures | 79,597 | 100,868
Right-of-use operating lease assets obtained in exchange for operating lease liabilities | $ 785 | $ 2,311

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