Quarterly report pursuant to Section 13 or 15(d)

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

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Mortgage Notes Payable and Line of Credit - Summary of Interest Rate Cap Agreement (Detail) - Interest Rate Cap [Member] - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Date of Issuance Nov. 26, 2013  
Notional Amount $ 8,200,000  
LIBOR Cap 3.00%  
Maturity Date Dec. 01, 2016  
Cost $ 31,000 $ 31,000
Fair Value   $ 4,000