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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Series A Preferred Units        
Units outstanding (units) 71,090,468 71,090,468 71,090,468 71,090,468
Series B Preferred Units        
Units outstanding (units) 800,000 800,000 800,000 800,000
Common Units        
Units outstanding (units) 722,055,847 722,380,416 728,053,007 728,028,576