Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Mortgage Notes Payable and Credit Facility - Additional Information (Detail)
 3 Months Ended
Oct. 05, 2015
USD ($)
Mar. 31, 2017
USD ($)
mortgage
lender
property
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Aug. 31, 2013
USD ($)
Debt Instrument [Line Items]          
Number of properties collateralized in mortgage notes payable | property   91      
Number of long-term mortgages repaid | mortgage   3      
Number of properties repaid to collateralized mortgages notes payable | mortgage   7      
Payments of deferred financing costs   $ 17,000 $ 380,000    
Fair value of mortgage notes payable   $ 412,200,000      
Maximum borrowing capacity $ 150,000,000.0       $ 100,000,000.0
Expiration date 2019-08        
Term of extended period 1 year        
Optional extension period 1 year        
Extension fee on initial maturity (as percent)   0.25%      
Number of lenders added to agreement | lender   3      
Line of credit outstanding   $ 63,797,000   $ 39,225,000  
Weighted average interest rate on debt outstanding (as percent)   4.66%      
Term Loan Facility          
Debt Instrument [Line Items]          
Expiration date 2020-10        
Extension fee on initial maturity (as percent)   0.05%      
Line of credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 85,000,000.0        
Line of credit outstanding   $ 89,200,000      
Weighted average interest rate (as percent)   3.22%      
Letters of credit, outstanding   $ 1,000,000      
Maximum additional amount that can be drawn under Line of Credit   $ 19,800,000      
Line of credit | Term Loan Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 25,000,000.0        
Letter of credit          
Debt Instrument [Line Items]          
Weighted average interest rate on debt outstanding (as percent)   2.25%      
Mortgage notes payable          
Debt Instrument [Line Items]          
Number of mortgage notes payable | mortgage   42      
Number of properties collateralized in mortgage notes payable | property   63      
Net book value of collateralized mortgage properties   $ 610,000,000      
Recourse amount of mortgage notes payable   $ 8,900,000      
Percentage of debt recourse (as percent)   2.20%      
Carrying value   $ 412,121,000      
Weighted average interest rate on debt outstanding (as percent)   4.40%      
Fixed rate mortgage loans          
Debt Instrument [Line Items]          
Number of properties collateralized in mortgage notes payable | property   46      
Payments of deferred financing costs   $ 0 $ 400,000    
Carrying value   $ 348,983,000   $ 378,477,000  
Weighted average interest rate on debt outstanding (as percent)   6.05%