Fair Value Measurements - Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Carrying Amount
Assets:
Cash equivalents	$ 356,391	$ 47,852
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)	1,096,544	1,096,544
Fair Value | Level 1
Assets:
Cash equivalents	356,391	47,852
Fair Value | Level 2
Liabilities:
Mortgages payable (excluding deferred debt issuance costs, net)	$ 1,064,832	$ 1,061,221