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Debt Obligations - Non-Operating Corporate 8.50% Senior Secured Notes due 2026 Narrative (Details) - Secured Debt - Non-Operating Corporate - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2021
8.50% Senior Secured Notes              
Debt Instrument [Line Items]              
Interest rate   8.50%   8.50%     8.50%
Face amount             $ 330,000,000
Debt issued, percentage of par value             100.00%
Debt conversion, amount exchanged $ 328,100,000            
Outstanding debt   $ 1,900,000   $ 1,900,000   $ 330,000,000.0  
Interest rate, effective percentage             9.30%
Debt issuance costs             $ 10,800,000
Deferred financing fees $ 1,300,000 5,000   5,000   2,800,000  
Amortization of discount on investments, net   $ 2,600,000 $ 7,600,000 $ 17,900,000 $ 22,800,000    
10.50% Senior Secured Notes              
Debt Instrument [Line Items]              
Interest rate 10.50% 10.50%   10.50%      
Face amount $ 360,400,000            
Debt issued, percentage of par value 100.00%            
Outstanding debt   $ 360,400,000   $ 360,400,000   $ 0  
Interest rate, effective percentage   14.40%   14.40%      
Deferred financing fees   $ 1,200,000   $ 1,200,000