Quarterly report pursuant to Section 13 or 15(d)

Mortgage Notes Payable, Line of Credit and Term Loan Facility - Summary of Interest Rate Cap Agreement (Detail)

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Mortgage Notes Payable, Line of Credit and Term Loan Facility - Summary of Interest Rate Cap Agreement (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Debt Instrument [Line Items]      
Cost $ 257    
Carrying Value 516,186   $ 525,332
Proceeds from Notes Payable 56,005 $ 61,059  
Notional Amount 64,184   33,044
Fair Value $ 55   40
Interest Rate Cap Agreement November 2013 [Member]      
Debt Instrument [Line Items]      
Date of Issuance Nov. 30, 2013    
Maturity Date Dec. 01, 2016    
Cost $ 31    
Notional Amount 8,200   8,200
Fair Value $ 0   0
Interest Rate Cap Agreement November 2013 [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 3.00%    
Interest Rate Cap Agreement July 2015 [Member]      
Debt Instrument [Line Items]      
Date of Issuance Jul. 31, 2015    
Maturity Date Jul. 01, 2018    
Cost $ 68    
Notional Amount 20,709   21,204
Fair Value $ 0   14
Interest Rate Cap Agreement July 2015 [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 3.00%    
Interest Rate Cap Agreement December 2015 [Member]      
Debt Instrument [Line Items]      
Date of Issuance Dec. 31, 2015    
Maturity Date Dec. 01, 2020    
Cost $ 52    
Notional Amount 3,574   3,640
Fair Value $ 5   26
Interest Rate Cap Agreement December 2015 [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 3.00%    
Interest Rate Cap Agreement March 2016 [Member]      
Debt Instrument [Line Items]      
Date of Issuance Mar. 31, 2016    
Maturity Date Mar. 01, 2019    
Cost $ 33    
Notional Amount 18,260   0
Fair Value $ 2   0
Interest Rate Cap Agreement March 2016 [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 3.00%    
Interest Rate Cap Agreement April 2016      
Debt Instrument [Line Items]      
Cost $ 27    
Notional Amount 9,441   0
Fair Value $ 2   0
Interest Rate Cap Agreement April 2016 | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 2.50%    
Interest Rate Cap Six [Member]      
Debt Instrument [Line Items]      
Cost $ 46    
Notional Amount 4,000   0
Fair Value $ 46   0
Interest Rate Cap Six [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 2.50%    
Variable Rate Mortgages [Member]      
Debt Instrument [Line Items]      
Carrying Value $ 64,161   $ 33,044