Fair Value (Assets and Liabilities Not Measured at Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Assets:
Cash and Restricted cash	$ 889,172	$ 1,098,937	$ 1,053,520	$ 1,216,637
Liabilities:
Allowance for accounts receivable	9,200	8,900
Level 1 | Carrying Amount
Assets:
Cash and Restricted cash	889,172	1,098,937
Level 1 | Estimated Fair Value
Assets:
Cash and Restricted cash	889,172	1,098,937
Level 3 | Carrying Amount
Assets:
Accounts receivable, net	105,683	103,437
Notes receivable, net	1,434	3,339
Level 3 | Estimated Fair Value
Assets:
Accounts receivable, net	105,683	103,437
Notes receivable, net	1,434	3,339
Level 2 | Carrying Amount
Liabilities:
Fixed-rate debt	3,607,734	3,610,618
Variable-rate debt	1,223,310	1,191,570
Level 2 | Estimated Fair Value
Liabilities:
Fixed-rate debt	3,306,222	3,298,859
Variable-rate debt	$ 1,223,310	$ 1,191,570