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Subsequent Events - Additional Information (Detail)
Jul. 26, 2021
$ / shares
shares
Jun. 30, 2021
$ / shares
Dec. 31, 2020
$ / shares
Subsequent Event [Line Items]      
Common stock, par value | $ / shares   $ 0.01 $ 0.01
Subsequent Event | Merger Agreement      
Subsequent Event [Line Items]      
Common stock, par value | $ / shares $ 0.01    
Number of common share issued for each common unit tendered for redemption | shares 1    
Subsequent Event | Merger Agreement | Steadfast Apartment REIT, Inc.      
Subsequent Event [Line Items]      
Common stock, par value | $ / shares $ 0.01    
Shares received through Merger | shares 99,800,000    
Subsequent Event | Merger Agreement | Steadfast Apartment REIT, Inc. | Common Shares      
Subsequent Event [Line Items]      
Right to receive shares exchange ratio for each share 0.905    
Subsequent Event | Merger Agreement | Steadfast Apartment REIT Operating Partnership, L.P.      
Subsequent Event [Line Items]      
Shares received through Merger | shares 6,400,000    
Subsequent Event | Merger Agreement | Steadfast Apartment REIT Operating Partnership, L.P. | Common Units      
Subsequent Event [Line Items]      
Right to receive shares exchange ratio for each share 1