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Consolidation and Nature of Operations (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Cash paid during the period for: |  |
Income taxes, net of refunds | $ (3,028) | $ 10,788
Interest, net of amounts capitalized | 107,417 | 114,717
Significant non-cash investing and financing activities: |  |
Accrued capital expenditures | 87,815 | 108,056
Right-of-use operating lease assets obtained in exchange for operating lease liabilities | 434,997 | 4,562
Dividends accrued but not yet paid | 88,066 | 82,824
APS |  |
Cash paid during the period for: |  |
Income taxes, net of refunds | 0 | 35,573
Interest, net of amounts capitalized | 100,991 | 107,169
Significant non-cash investing and financing activities: |  |
Accrued capital expenditures | 87,815 | 108,056
Right-of-use operating lease assets obtained in exchange for operating lease liabilities | 434,997 | 4,562
Dividends accrued but not yet paid | $ 88,000 | $ 82,800

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