XML 84 R72.htm IDEA: XBRL DOCUMENT v3.21.2
Fair Value Measurements - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Mortgages Payable | Fair Value    
Financial liabilities:    
Financial liabilities $ 1,739,548 $ 1,606,470
Mortgages Payable | Carrying Amount    
Financial liabilities:    
Financial liabilities 1,684,407 1,603,869
Unsecured term loans | Fair Value    
Financial liabilities:    
Financial liabilities 400,201 399,678
Unsecured term loans | Carrying Amount    
Financial liabilities:    
Financial liabilities $ 400,000 $ 400,000