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SUBSEQUENT EVENTS (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Aug. 25, 2017
USD ($)
item
Aug. 24, 2017
USD ($)
Aug. 22, 2017
USD ($)
property
Aug. 21, 2017
USD ($)
property
Aug. 08, 2017
USD ($)
Jul. 31, 2017
USD ($)
property
Apr. 30, 2014
property
Sep. 06, 2017
USD ($)
$ / shares
Apr. 30, 2017
USD ($)
Subsequent Event [Line Items]                  
Earnest money deposit                 $ 23,659
Common Shares and Limited Partnership Units [Member]                  
Subsequent Event [Line Items]                  
Dividends Payable, Date Declared           Sep. 06, 2017      
Record Date           Sep. 15, 2017      
Payment Date           Oct. 02, 2017      
Series B Preferred Stock [Member]                  
Subsequent Event [Line Items]                  
Dividends Payable, Date Declared           Sep. 06, 2017      
Record Date           Sep. 15, 2017      
Payment Date           Oct. 02, 2017      
Senior Housing properties [Member]                  
Subsequent Event [Line Items]                  
Number of real estate properties classified as held for sale | property           2      
Sales price of pending disposition           $ 36,900      
Number of real estate properties sold | property             2    
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               $ 0.07  
Subsequent Event [Member] | Series B Preferred Stock [Member]                  
Subsequent Event [Line Items]                  
Quarterly amount per share or unit (in dollars per share) | $ / shares               $ 0.496875  
Subsequent Event [Member] | Senior Housing properties [Member]                  
Subsequent Event [Line Items]                  
Number of properties | property       2          
Total acquisition costs       $ 36,900          
Cash consideration       7,900          
Contract for deed       $ 29,000          
Subsequent Event [Member] | Unimproved Land [Member]                  
Subsequent Event [Line Items]                  
Sale price         $ 3,200        
Subsequent Event [Member] | Industrial [Member]                  
Subsequent Event [Line Items]                  
Sale price     $ 9,000            
Subsequent Event [Member] | Multi-Family Residential [Member]                  
Subsequent Event [Line Items]                  
Number of real estate properties sold | property     13            
Sale price     $ 12,300            
Number of apartment units | item 500                
Purchase price of pending acquisition $ 92,300                
Earnest money deposit               $ 7,000  
Subsequent Event [Member] | Commercial Healthcare [Member]                  
Subsequent Event [Line Items]                  
Sale price   $ 2,100