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Capital Accounts, Redeemable Preferred Limited Partner Interests (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2021
Jun. 30, 2021
Temporary Equity [Line Items]    
Preferred units outstanding, beginning balance (in units) 50,138 50,138
Series A cumulative convertible preferred units, paid-in kind distribution (in units) 274  
Preferred units outstanding, ending balance (in units) 50,412 50,412
Total distributions paid to convertible preferred unitholders   $ 1.8
Cash distributions paid to convertible preferred unitholders   $ 1.5