Quarterly report pursuant to Section 13 or 15(d)

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

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Mortgage Notes Payable and Credit Facility - Mortgages Notes Payable (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Debt Instrument [Line Items]    
Aggregate debt repaid $ 40,573 $ 51,977
Weighted average interest rate on debt repaid (as percent) 4.65%  
Fixed rate mortgage loans    
Debt Instrument [Line Items]    
Aggregate debt repaid $ 27,188  
Weighted average interest rate on debt repaid (as percent) 6.05%  
Variable rate mortgage loans    
Debt Instrument [Line Items]    
Aggregate debt repaid $ 8,163  
Variable rate mortgage loans | LIBOR    
Debt Instrument [Line Items]    
Basis spread (as percent) 2.15%  
Variable rate mortgage loans | LIBOR | Weighted average    
Debt Instrument [Line Items]    
Basis spread (as percent) 2.50%  
Aggregate Fixed Rate    
Debt Instrument [Line Items]    
Aggregate Fixed Rate Debt Issued or Assumed $ 11,179  
Weighted average interest rate on debt repaid (as percent) 3.55%  
Aggregate Variable Rate    
Debt Instrument [Line Items]    
Aggregate Variable Rate Debt Issued or Assumed $ 6,700  
Aggregate Variable Rate | LIBOR | Weighted average    
Debt Instrument [Line Items]    
Basis spread (as percent) 2.75%