XML 73 R56.htm IDEA: XBRL DOCUMENT v3.20.4
Mortgage Loans Payable and Unsecured Credit Facilities (Narrative) (Details) - USD ($)
12 Months Ended
Aug. 04, 2020
Sep. 08, 2017
Dec. 31, 2020
Feb. 11, 2021
Dec. 31, 2019
Line Of Credit Facility [Line Items]          
Credit facilities     $ 175,000,000   $ 106,000,000
Approximate amount of accumulated other comprehensive loss to be reclassified into earnings     6,900,000    
Interest Rate Swap [Member]          
Line Of Credit Facility [Line Items]          
Interest rate swaps liability     18,900,000    
Derivative, notional amount     $ 425,000,000.0   $ 425,000,000.0
Unsecured Credit Facility [Member]          
Line Of Credit Facility [Line Items]          
Credit facility borrowing capacity $ 300,000,000 $ 300,000,000      
Aggregate borrowing capacity including increase under accordion feature $ 750,000,000        
Revolving Credit Facility [Member]          
Line Of Credit Facility [Line Items]          
Credit facility expiration date     Feb. 28, 2021    
Line of credit facility extension allowed period   1 year 1 year    
Basis spread on borrowings variable rate     1.65%    
Credit facilities     $ 75,000,000.0    
Revolving Credit Facility [Member] | Subsequent Event [Member]          
Line Of Credit Facility [Line Items]          
Credit facility borrowing capacity       $ 56,700,000  
Credit facilities       $ 175,000,000.0  
Revolving Credit Facility [Member] | Minimum [Member]          
Line Of Credit Facility [Line Items]          
Basis spread on borrowings variable rate 1.35%        
Revolving Credit Facility [Member] | Maximum [Member]          
Line Of Credit Facility [Line Items]          
Basis spread on borrowings variable rate 1.95%        
Revolving Credit Facility [Member] | Unsecured Credit Facility [Member]          
Line Of Credit Facility [Line Items]          
Credit facility borrowing capacity   $ 250,000,000      
Credit facility expiration date   Sep. 08, 2021      
Term loan facility [Member]          
Line Of Credit Facility [Line Items]          
Basis spread on borrowings variable rate     1.60%    
Term loan facility [Member] | Minimum [Member]          
Line Of Credit Facility [Line Items]          
Basis spread on borrowings variable rate 1.30%        
Term loan facility [Member] | Maximum [Member]          
Line Of Credit Facility [Line Items]          
Basis spread on borrowings variable rate 1.90%        
Term loan facility [Member] | Unsecured Credit Facility [Member]          
Line Of Credit Facility [Line Items]          
Credit facility borrowing capacity   $ 50,000,000      
Credit facility expiration date   Sep. 08, 2022