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SUBSEQUENT EVENTS (Details) - Subsequent Event - USD ($)
$ / shares in Units, $ in Millions
Jun. 15, 2020
May 01, 2020
Private Placement Notes    
Class of Stock [Line Items]    
Senior unsecured notes purchase commitment   $ 250
Stated percentage   3.68%
Series A Preferred Units | Forecast    
Class of Stock [Line Items]    
Preferred unit dividends declared (in dollars per share) $ 0.414063  
Series B Preferred Units | Forecast    
Class of Stock [Line Items]    
Preferred unit dividends declared (in dollars per share) $ 0.409375