Fair Value Measurements - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Mortgages Payable | Fair Value
Financial liabilities:
Financial liabilities	$ 1,606,673	$ 1,814,780
Mortgages Payable | Carrying Amount
Financial liabilities:
Financial liabilities	1,621,127	1,788,259
Revolving Credit Facility | Fair Value
Financial liabilities:
Financial liabilities		300,363
Revolving Credit Facility | Carrying Amount
Financial liabilities:
Financial liabilities		300,000
Unsecured term loans | Fair Value
Financial liabilities:
Financial liabilities	400,263	400,519
Unsecured term loans | Carrying Amount
Financial liabilities:
Financial liabilities	$ 400,000	$ 400,000