Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Information
Cash and cash equivalents	$ 131,406		$ 141,773
Restricted cash (included in other assets)	$ 10,224		$ 8,923
Restricted Cash, Statement of Financial Position [Extensible Enumeration]	Other Assets		Other Assets
Total	$ 141,630	$ 168,339	$ 150,696	$ 151,485
Interest, net of amounts capitalized	140,400	119,000
Income taxes, net of refunds	6,500	7,600
Accrued construction related costs	$ 451,000	$ 417,300