Fair Value Measurements - Items Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Secured And Mezzanine Loans Receivable
Assets:
Loans receivable	$ 178,568	$ 156,368
Recurring | Mortgage secured loans receivable
Assets:
Loans receivable	156,769	117,684
Recurring | Mezzanine loan receivable
Assets:
Loans receivable	21,799	38,684
Recurring | Level 1 | Secured And Mezzanine Loans Receivable
Assets:
Loans receivable	0	0
Recurring | Level 1 | Mortgage secured loans receivable
Assets:
Loans receivable	0	0
Recurring | Level 1 | Mezzanine loan receivable
Assets:
Loans receivable	0	0
Recurring | Level 2 | Secured And Mezzanine Loans Receivable
Assets:
Loans receivable	0	0
Recurring | Level 2 | Mortgage secured loans receivable
Assets:
Loans receivable	0	0
Recurring | Level 2 | Mezzanine loan receivable
Assets:
Loans receivable	0	0
Recurring | Level 3 | Secured And Mezzanine Loans Receivable
Assets:
Loans receivable	178,568	156,368
Recurring | Level 3 | Mortgage secured loans receivable
Assets:
Loans receivable	156,769	117,684
Recurring | Level 3 | Mezzanine loan receivable
Assets:
Loans receivable	$ 21,799	$ 38,684