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SUBSEQUENT EVENTS (Redemption of Shares of Common Stock) (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 3 Months Ended
Aug. 12, 2020
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Subsequent Event [Line Items]          
Redemptions of common stock   $ 19,191 $ 19,514 $ 21,115 $ 21,724
Subsequent event          
Subsequent Event [Line Items]          
Redemption of common stock (shares) 1.3        
Redemptions of common stock $ 9,300        
Common stock, average redemption price per share (USD per share) $ 7.26        
Unfulfilled redemption requests (shares) 23.2