Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Mortgage Notes Payable and Credit Facility - Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 02, 2019
USD ($)
Oct. 27, 2017
USD ($)
Oct. 31, 2015
USD ($)
Jun. 30, 2019
USD ($)
mortgage
property
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
mortgage
property
Jun. 30, 2018
USD ($)
Jul. 01, 2019
USD ($)
Dec. 31, 2018
USD ($)
Aug. 26, 2017
USD ($)
Oct. 05, 2015
USD ($)
Debt Instrument [Line Items]                      
Number of properties collateralized in mortgage notes payable | property       104   104          
Payments of deferred financing costs           $ 713,000 $ 253,000        
Fair value of mortgage notes payable       $ 464,200,000   464,200,000          
Extension fee on initial maturity (as percent)   0.25%                  
Line of credit outstanding       $ 50,585,000   $ 50,585,000     $ 50,084,000    
Weighted average interest rate on debt outstanding (as percent)       4.63%   4.63%          
Term loan facility                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity   $ 75,000,000.0               $ 25,000,000.0  
Extension fee on initial maturity (as percent)     0.05%                
Line of credit                      
Debt Instrument [Line Items]                      
Line of credit outstanding       $ 126,000,000   $ 126,000,000          
Weighted average interest rate (as percent)       4.12%   4.12%          
Letters of credit, outstanding       $ 7,400,000   $ 7,400,000          
Maximum additional amount that can be drawn under Line of Credit       $ 23,000,000   $ 23,000,000          
Line of credit | Term loan facility                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity     $ 25,000,000.0                
Term of debt     5 years                
Line of credit | Revolving credit facility                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity     $ 85,000,000.0               $ 85,000,000.0
Letter of credit                      
Debt Instrument [Line Items]                      
Weighted average interest rate on debt outstanding (as percent)       1.75%   1.75%          
Variable rate mortgage loans                      
Debt Instrument [Line Items]                      
Number of properties collateralized in mortgage notes payable | property       18   18          
Carrying value       $ 59,510,000   $ 59,510,000     60,659,000    
Mortgage notes payable                      
Debt Instrument [Line Items]                      
Number of mortgage notes payable | mortgage       49   49          
Number of properties collateralized in mortgage notes payable | property       69   69          
Net book value of collateralized mortgage properties       $ 658,800,000   $ 658,800,000          
Recourse amount of mortgage notes payable       10,100,000   $ 10,100,000          
Percentage of debt recourse (as percent)           2.20%          
Carrying value       $ 455,900,000   $ 455,900,000          
Weighted average interest rate on debt outstanding (as percent)       4.52%   4.52%          
Issued and assumed mortgage notes payable                      
Debt Instrument [Line Items]                      
Number of mortgage notes payable | mortgage       3   3          
Number of properties collateralized in mortgage notes payable | property       3   3          
Fixed rate mortgage loans                      
Debt Instrument [Line Items]                      
Number of properties collateralized in mortgage notes payable | property       51   51          
Number of long-term mortgages repaid | mortgage           1          
Number of properties repaid to collateralized mortgages notes payable | property           3          
Stated interest rate (as percent)       4.18%   4.18%          
Payments of deferred financing costs       $ 400,000 $ 30,000 $ 700,000 $ 200,000        
Carrying value       $ 396,382,000   $ 396,382,000     $ 385,051,000    
LIBOR | Term loan facility                      
Debt Instrument [Line Items]                      
Spread on LIBOR (as percent)   2.75%                  
Minimum | Fixed rate mortgage loans                      
Debt Instrument [Line Items]                      
Stated interest rate (as percent)       3.42%   3.42%          
Minimum | LIBOR | Variable rate mortgage loans                      
Debt Instrument [Line Items]                      
Spread on LIBOR (as percent)           2.25%          
Maximum | Fixed rate mortgage loans                      
Debt Instrument [Line Items]                      
Stated interest rate (as percent)       6.63%   6.63%          
Maximum | LIBOR | Variable rate mortgage loans                      
Debt Instrument [Line Items]                      
Spread on LIBOR (as percent)           2.75%          
Subsequent event | Term loan facility                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity $ 160,000,000.0             $ 75,000,000.0      
Subsequent event | Revolving credit facility                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity $ 100,000,000.0             $ 85,000,000.0      
Subsequent event | Line of credit                      
Debt Instrument [Line Items]                      
Extension fee on initial maturity (as percent) 0.10%                    
Subsequent event | Line of credit | Term loan facility                      
Debt Instrument [Line Items]                      
Term of debt 5 years                    
Subsequent event | Line of credit | Revolving credit facility                      
Debt Instrument [Line Items]                      
Term of debt 4 years                    
Debt instrument fees incurred $ 1,300,000                    
Subsequent event | Minimum | LIBOR | Term loan facility                      
Debt Instrument [Line Items]                      
Spread on LIBOR (as percent) 2.50%                    
Subsequent event | Maximum | LIBOR | Term loan facility                      
Debt Instrument [Line Items]                      
Spread on LIBOR (as percent) 2.75%