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TSRE Merger - Additional Information (Detail)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 17, 2015
USD ($)
Property
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Business Acquisition [Line Items]        
Increase in fair value of net assets acquired   $ 592    
Gains (losses) on TSRE merger and property acquisitions $ 64,604   $ 64,604 $ 2,882
Indebtedness   359,495 359,495  
Trade Street Residential, Inc.        
Business Acquisition [Line Items]        
Fair value of equity consideration transferred 123,855      
Indebtedness 359,495 121,885 $ 121,885  
Paid indebtedness 237,610      
Acquisition expenses 12,906      
Expenses associated with extinguishing financing arrangement 23,219      
Increase in acquisition expenses   $ 376    
Expenses associated with employee separation $ 4,289      
Number of properties acquired | Property 19      
Trade Street Residential, Inc. | TSRE Properties        
Business Acquisition [Line Items]        
Gains (losses) on TSRE merger and property acquisitions $ 31,000      
Common Shares | Trade Street Residential, Inc.        
Business Acquisition [Line Items]        
Fair value of equity consideration transferred 109,857      
Gains (losses) on TSRE merger and property acquisitions 34,000      
Limited Partner | Trade Street Residential, Inc.        
Business Acquisition [Line Items]        
Fair value of equity consideration transferred $ 13,998