Consolidation and Nature of Operations (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid (received) during the period for:
Income taxes, net of refunds	$ (763)	$ (3,028)
Interest, net of amounts capitalized	166,257	155,623
Significant non-cash investing and financing activities:
Accrued capital expenditures	129,503	84,022
APS
Cash paid (received) during the period for:
Income taxes, net of refunds	17,612	0
Interest, net of amounts capitalized	160,467	148,713
Significant non-cash investing and financing activities:
Accrued capital expenditures	$ 129,503	$ 84,022