Annual report pursuant to Section 13 and 15(d)

Mortgage Notes Payable and Credit Facility - Mortgage Notes Payable (Detail)

v3.20.4
Mortgage Notes Payable and Credit Facility - Mortgage Notes Payable (Detail)
$ in Thousands
12 Months Ended
Dec. 21, 2020
USD ($)
Dec. 18, 2020
USD ($)
Mar. 09, 2020
USD ($)
Jan. 27, 2020
USD ($)
property
Oct. 27, 2017
Dec. 31, 2020
USD ($)
property
mortgage
Dec. 31, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]                
Debt repaid           $ 50,662 $ 57,438 $ 27,850
Weighted Average Interest Rate on Fixed Rate Debt Extended           3.45%    
Number of properties acquired | property           9 18  
Fixed rate mortgage loans                
Debt Instrument [Line Items]                
Debt repaid           $ 18,109    
Stated interest rate (as a percent)           5.19%    
Variable rate mortgage loans                
Debt Instrument [Line Items]                
Debt repaid           $ 19,284    
New fixed rate mortgage notes payable                
Debt Instrument [Line Items]                
Aggregate Fixed Rate Debt Issued           $ 52,578    
Weighted Average Interest Rate on Fixed Rate Debt Extended           3.18%    
Mortgage notes payable                
Debt Instrument [Line Items]                
Number of mortgages repaid | mortgage           7    
Number of properties collateralized | property           8    
Number of long-term mortgages issued | mortgage           6    
Number of properties to issue collateralized mortgage notes payable | property           6    
Weighted Average Interest Rate on Fixed Rate Debt Extended           4.24%    
LIBOR                
Debt Instrument [Line Items]                
Weighted Average Interest Rate on Variable Rate Debt Repaid         2.75%      
LIBOR | Variable rate mortgage loans | Weighted Average                
Debt Instrument [Line Items]                
Weighted Average Interest Rate on Variable Rate Debt Repaid           2.20%    
Property Maturing February 1, 2030 | New fixed rate mortgage notes payable                
Debt Instrument [Line Items]                
Aggregate Fixed Rate Debt Issued       $ 18,300        
Weighted Average Interest Rate on Fixed Rate Debt Extended       3.625%        
Number of properties acquired | property       3        
Property Maturing March 9, 2030 | New fixed rate mortgage notes payable                
Debt Instrument [Line Items]                
Aggregate Fixed Rate Debt Issued     $ 17,500          
Weighted Average Interest Rate on Fixed Rate Debt Extended     2.80%          
Property Maturing January 1, 2028 | New fixed rate mortgage notes payable                
Debt Instrument [Line Items]                
Aggregate Fixed Rate Debt Issued   $ 10,300            
Weighted Average Interest Rate on Fixed Rate Debt Extended   3.00%            
Property Maturing December 23, 2030 | New fixed rate mortgage notes payable                
Debt Instrument [Line Items]                
Aggregate Fixed Rate Debt Issued $ 6,400              
Weighted Average Interest Rate on Fixed Rate Debt Extended 3.25%