Fair Value Measurements (Financial Assets and Liabilities Not Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Carrying Amount
Assets:
Cash equivalents	$ 47,852	$ 427,601
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)	1,096,544	1,096,544
Level 1 | Fair Value
Assets:
Cash equivalents	47,852	427,601
Level 2 | Fair Value
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)	$ 1,061,221	$ 1,064,122