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