Equity Investees (Schedule of Balance Sheet Information for Equity Investees) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets
Current assets	$ 965,694	$ 853,047
Fixed assets, net	4,183,702	4,096,573
Total assets	6,669,459	6,365,992
LIABILITIES AND CAPITAL
Current liabilities	857,980	709,107
Total liabilities and equity	6,669,459	6,365,992
Poseidon
Assets
Current assets	23,888	27,878
Fixed assets, net	145,726	147,505
Other assets	16,394	13,419
Total assets	186,008	188,802
LIABILITIES AND CAPITAL
Current liabilities	11,800	10,087
Other liabilities	238,917	236,813
Equity (Deficit)	(64,709)	(58,098)
Total liabilities and equity	$ 186,008	$ 188,802