Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

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Stockholders' Equity - Additional Information (Detail) (USD $)
 6 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Apr. 02, 2014
Maximum [Member]
Jun. 30, 2014
Common Stock [Member]
Jan. 28, 2013
Common Stock [Member]
Jun. 30, 2014
IPO [Member]
Jan. 28, 2013
IPO [Member]
Jun. 30, 2014
IPO [Member]
Dec. 31, 2013
IPO [Member]
Subsidiary, Sale of Stock [Line Items]                  
Initial public offering of shares of common stock             3,333,334    
Public offering price         $ 15.00        
Gross proceeds from initial public offering $ 56,700,000                
Underwriters exercised their option to purchase an additional shares               3,780,264  
Net proceeds after deducting offering expenses       51,300,000          
Invested in new property acquisition                 37,900,000
Expended or accrued for capital improvements                 1,700,000
Distributions paid 1,175,447 2,873,316       10,300,000      
Uninvested proceed from initial public offering               0  
Securities allowed for issuance     $ 300,000,000