Equity Investees (Schedule of Balance Sheet Information for Equity Investees) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets
Current assets	$ 952,795	$ 853,047
Fixed assets, net	4,116,942	4,096,573
Total assets	6,586,460	6,365,992
LIABILITIES AND CAPITAL
Current liabilities	805,246	709,107
Total liabilities and equity	6,586,460	6,365,992
Poseidon
Assets
Current assets	22,904	27,878
Fixed assets, net	147,223	147,505
Other assets	13,760	13,419
Total assets	183,887	188,802
LIABILITIES AND CAPITAL
Current liabilities	217,582	10,087
Other liabilities	27,727	236,813
Equity (Deficit)	(61,422)	(58,098)
Total liabilities and equity	$ 183,887	$ 188,802