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Debt - Narrative (Details) - USD ($)
6 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
FHLB of Indianapolis      
Debt Instrument [Line Items]      
Debt issuance costs $ 24,832,000 $ 25,061,000  
Senior Unsecured Notes | FHLB of Indianapolis      
Debt Instrument [Line Items]      
Debt issuance costs 16,385,000 16,208,000  
Senior Unsecured Notes | 9.75% Public Senior Unsecured Notes (New Public Notes)      
Debt Instrument [Line Items]      
Face amount of debt $ 17,900,000   $ 17,900,000
Maturity date Sep. 30, 2028    
Interest rate 9.75%   9.75%
Interest rate, payment terms interest rate of 9.75% per annum, payable quarterly at the end of March, June, September and December    
Debt issuance costs $ 1,500,000    
Senior Unsecured Notes | 6.75% Public Senior Unsecured notes (Old Public Notes)      
Debt Instrument [Line Items]      
Interest rate 6.75%    
Senior Secured Notes      
Debt Instrument [Line Items]      
Call premium $ 1,800,000    
Outstanding debt 9,300,000    
Senior Secured Notes | FHLB of Indianapolis      
Debt Instrument [Line Items]      
Debt issuance costs 8,447,000 8,853,000  
Senior Secured Notes | Privately Placed 12.5% Senior Secured Notes      
Debt Instrument [Line Items]      
Face amount of debt $ 9,300,000    
Maturity date     Sep. 30, 2028
Interest rate 12.50%   12.50%
Quarterly payment of principal $ 250,000    
Call premium percentage 22.00%    
Concession made to the lender $ 0    
Debt issuance costs   $ 803,000  
Restructuring costs incurred $ 173,000