Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Information
Cash and cash equivalents	$ 157,964		$ 142,698
Restricted cash (included in other assets)	10,375		8,787
Total	168,339	$ 230,712	$ 151,485	$ 123,652
Interest, net of amounts capitalized	119,000	120,300
Income taxes, net of refunds	7,600	4,600
Accrued construction related costs	$ 417,300	$ 322,500