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SUBSEQUENT EVENTS (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 19, 2017
USD ($)
May 26, 2017
USD ($)
item
May 15, 2017
USD ($)
Apr. 30, 2017
Jun. 05, 2017
$ / shares
Common Shares and Limited Partnership Units [Member]          
Subsequent Event [Line Items]          
Record Date       Jun. 22, 2017  
Payment Date       Jul. 03, 2017  
Series B Preferred Stock [Member]          
Subsequent Event [Line Items]          
Record Date       Jun. 22, 2017  
Payment Date       Jun. 30, 2017  
Subsequent Event [Member] | Common Shares and Limited Partnership Units [Member]          
Subsequent Event [Line Items]          
Quarterly amount per share or unit (in dollars per share) | $ / shares         $ 0.0700
Subsequent Event [Member] | Series B Preferred Stock [Member]          
Subsequent Event [Line Items]          
Quarterly amount per share or unit (in dollars per share) | $ / shares         $ 0.4968
Subsequent Event [Member] | Multi-Family Residential [Member]          
Subsequent Event [Line Items]          
Number of apartment units | item   191      
Total acquisition costs   $ 61.5      
Subsequent Event [Member] | Retail [Member] | Discontinued Operations, Disposed of by Sale [Member]          
Subsequent Event [Line Items]          
Sale price     $ 3.4    
Subsequent Event [Member] | Commercial Healthcare [Member] | Discontinued Operations, Disposed of by Sale [Member]          
Subsequent Event [Line Items]          
Sales price of pending disposition $ 2.1