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EQUITY STRUCTURE AND ACCOUNTS - Additional Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Oct. 30, 2014
2014 Share Repurchase Authorization Program          
Class of Stock [Line Items]          
Remaining amount available for repurchase $ 39,900,000        
Percentage of aggregate common stock outstanding under Repurchase Program 7.80%        
Closing price (in dollars per share) $ 4.74        
Series REIT LP Units          
Class of Stock [Line Items]          
Exchange of noncontrolling interest for common stock, units exchanged (in shares) 0 101,000      
Series TRS LP Units          
Class of Stock [Line Items]          
Exchange of noncontrolling interest for common stock, units exchanged (in shares) 0 101,000      
Class A Common Stock          
Class of Stock [Line Items]          
Exchange of noncontrolling interest for common stock (in shares)   101,000      
Class A Common Stock | 2014 Share Repurchase Authorization Program          
Class of Stock [Line Items]          
Additional authorizations         $ 50,000,000.0
Remaining amount available for repurchase $ 39,931,000 $ 41,769,000 $ 41,132,000 $ 41,769,000  
Class B Common Stock          
Class of Stock [Line Items]          
Exchange of noncontrolling interest for common stock (in shares)   (101,000)