Supplemental Cash Flow Supplemental Cash Flow (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Elements [Line Items]
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 66,647	$ 75,506	$ 57,439
Income Taxes Paid, Net	(1,057)	9	(1,167)
Change in accounts payable related to capital expenditures	519	(28,676)	(68,246)
Increase (Decrease) in Asset Retirement Obligations	11,673	54,984	29,533
Operating Lease, Payments	7,603	9,246	5,301
Operating Cash Flow from Financing Leases	117	156	253
Finance Lease, Principal Payments	1,688	1,905	1,952
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	1,457	4,305	1,428
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 2,109	$ 703	$ 2,323
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued	0	1,009,015	0