v3.7.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended 5 Months Ended 6 Months Ended
Aug. 08, 2017
Aug. 10, 2017
Jan. 31, 2017
Feb. 29, 2016
Oct. 31, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Subsequent Event [Line Items]                    
Proceeds from issuance of common stock, net               $ 161,435 $ 121,236  
Number of shares issued             17,290,000 17,290,000   15,158,000
Cash distributions paid to stockholders               $ 21,091 16,757  
Rental property acquired               $ 192,853 $ 245,575  
Distribution declared per share     $ 0.410 $ 0.405   $ 0.410 $ 0.415      
Common stock, par value             $ 0.001 $ 0.001   $ 0.001
Scenario, Forecast                    
Subsequent Event [Line Items]                    
Monthly distribution approved per membership unit         $ 0.415          
Common stock, par value         $ 80.00          
Subsequent Event                    
Subsequent Event [Line Items]                    
Proceeds from issuance of common stock, net   $ 21,001                
Number of shares issued   263,000                
Cash distributions paid to stockholders   $ 7,635                
Rental property acquired   $ 42,942                
Distribution declared per share $ 0.415