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Long-Term Debt - Schedule of Accrued Interest Payable on Long Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Sep. 30, 2021
Sep. 30, 2019
Jun. 30, 2018
Debt Instrument [Line Items]            
Total Accrued Interest Payable on Long-Term Debt $ 10,248 $ 11,966        
Non-Recourse BPL Financing            
Debt Instrument [Line Items]            
Total Accrued Interest Payable on Long-Term Debt $ 5,502 $ 3,364        
Convertible notes | 5.625% exchangeable senior notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate (as a percent) 5.625% 5.625%   5.625%   5.625%
Total Accrued Interest Payable on Long-Term Debt $ 0 $ 3,896        
Convertible notes | 5.75% exchangeable senior notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate (as a percent) 5.75% 5.75%     5.75%  
Total Accrued Interest Payable on Long-Term Debt $ 2,251 $ 2,332        
Convertible notes | 7.75% convertible senior notes            
Debt Instrument [Line Items]            
Debt instrument, interest rate (as a percent)   7.75% 7.75%      
Total Accrued Interest Payable on Long-Term Debt 566 $ 741        
Trust preferred securities            
Debt Instrument [Line Items]            
Total Accrued Interest Payable on Long-Term Debt $ 1,929 $ 1,633