Fair Value (Assets and Liabilities Not Measured at Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Assets:
Cash and Restricted cash	$ 843,152	$ 1,098,937	$ 922,624	$ 1,216,637
Liabilities:
Allowance for accounts receivable	10,300	8,900
Level 1 | Carrying Amount
Assets:
Cash and Restricted cash	843,152	1,098,937
Level 1 | Estimated Fair Value
Assets:
Cash and Restricted cash	843,152	1,098,937
Level 3 | Carrying Amount
Assets:
Accounts receivable, net	104,394	103,437
Notes receivable, net	1,084	3,339
Level 3 | Estimated Fair Value
Assets:
Accounts receivable, net	104,394	103,437
Notes receivable, net	1,084	3,339
Level 2 | Carrying Amount
Liabilities:
Fixed-rate debt	3,604,118	3,610,618
Variable-rate debt	1,392,080	1,191,570
Level 2 | Estimated Fair Value
Liabilities:
Fixed-rate debt	3,269,252	3,298,859
Variable-rate debt	$ 1,392,080	$ 1,191,570