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Related Party Transactions and Investments in Non-Consolidated Entities - Allowance for credit losses (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning allowance for credit losses   $ (4,237,000) $ (4,237,000)    
Additional increases to the allowance for credit losses       $ (1,140,000) $ 4,200,000
Reductions to the allowance for credit losses $ 0 $ 4,200,000 $ 4,237,000    
Ending allowance for credit losses       $ 1,140,000 $ 4,237,000