Quarterly report pursuant to Section 13 or 15(d)

Mortgage Notes Payable, Line of Credit and Term Loan Facility - Summary of Long-Term Mortgages Additional Information (Detail)

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Mortgage Notes Payable, Line of Credit and Term Loan Facility - Summary of Long-Term Mortgages Additional Information (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
May 26, 2016
Dec. 31, 2015
Debt Instrument [Line Items]      
Carrying Value $ 516,186   $ 525,332
Great Southern Bank [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 2.50%    
Prudential [Member]      
Debt Instrument [Line Items]      
Carrying Value   $ 9,900  
Mortgage Notes Payable [Member]      
Debt Instrument [Line Items]      
Carrying Value $ 444,522   $ 455,863
Mortgage Notes Payable [Member] | First Niagara Bank [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR Cap 3.00%    
Mortgage Notes Payable [Member] | First Niagara Bank [Member] | Interest Rate Cap [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Maturity Date Mar. 01, 2019