Equity Investees (Schedule of Balance Sheet Information for Equity Investees) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Current assets	$ 1,091,545	$ 853,047
Fixed assets, net	4,322,632	4,096,573
Total assets	6,938,442	6,365,992
LIABILITIES AND CAPITAL
Current liabilities	1,023,713	709,107
Total liabilities and equity	6,938,442	6,365,992
Poseidon
Assets
Current assets	21,428	27,878
Fixed assets, net	143,258	147,505
Other assets	16,629	13,419
Total assets	181,315	188,802
LIABILITIES AND CAPITAL
Current liabilities	8,854	10,087
Other liabilities	240,553	236,813
Equity (Deficit)	(68,092)	(58,098)
Total liabilities and equity	$ 181,315	$ 188,802