v3.20.2
PARTNERS' EQUITY Table 1 - Cash Distributions - Preferred Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Series A Preferred Limited Partner [Member]        
Distribution Made to Preferred Limited Partner [Line Items]        
Preferred units distribution percentage     8.50%  
Preferred unit distribution $ 0.53125      
Fixed distribution per quarter $ 4,813      
Series B Preferred Limited Partner [Member]        
Distribution Made to Preferred Limited Partner [Line Items]        
Preferred units distribution percentage     7.625%  
Preferred unit distribution $ 0.47657      
Fixed distribution per quarter $ 7,339      
Series C Preferred Limited Partner [Member]        
Distribution Made to Preferred Limited Partner [Line Items]        
Preferred units distribution percentage     9.00%  
Preferred unit distribution $ 0.56250      
Fixed distribution per quarter $ 3,881      
Preferred Limited Partner [Member]        
Distribution Made to Preferred Limited Partner [Line Items]        
Fixed distribution per quarter $ 16,034 $ 16,034 $ 48,100 $ 48,100