Supplemental Disclosures of Cash Flow Information Supplemental Cash Flow Elements (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental Cash Flow Elements [Line Items]
Interest, net of capitalized interest	$ 16,915	$ 12,602
Income taxes	(204)	0
Capital Expenditures Incurred but Not yet Paid	70,026	39,694
Increase (Decrease) in Asset Retirement Obligations	$ 42,126	2,794
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	1,009,015
Operating Lease, Payments	$ 2,131	1,441
Operating Cash Flow from Financing Leases	57	60
Finance Lease, Principal Payments	489	494
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	4,217	481
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 471	$ 624