v3.20.4
CONSOLIDATED BALANCE SHEETS (parenthetical) - shares
Dec. 31, 2020
Dec. 31, 2019
Series D preferred units outstanding 23,246,650 23,246,650
Limited partners common units outstanding 109,468,127 108,527,806
Series A Preferred Limited Partner [Member]    
Preferred units outstanding 9,060,000 9,060,000
Series B Preferred Limited Partner [Member]    
Preferred units outstanding 15,400,000 15,400,000
Series C Preferred Limited Partner [Member]    
Preferred units outstanding 6,900,000 6,900,000