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Consolidation and Nature of Operations (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019
Cash paid during the period for: |  |
Income taxes, net of refunds | $ (3,028) | $ 12,488
Interest, net of amounts capitalized | 155,623 | 166,907
Significant non-cash investing and financing activities: |  |
Accrued capital expenditures | 84,022 | 85,099
APS |  |
Cash paid during the period for: |  |
Income taxes, net of refunds | 0 | 35,573
Interest, net of amounts capitalized | 148,713 | 157,593
Significant non-cash investing and financing activities: |  |
Accrued capital expenditures | $ 84,022 | $ 85,099

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