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Fair Value Measurements - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Apr. 30, 2021
8.00% Senior Secured Notes Due 2025 | Secured Debt            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Stated interest rate percentage 8.00% 8.00% 8.00% 8.00% 8.00%  
1.00% convertible notes due 2026 | Convertible Notes            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Stated interest rate percentage 1.00%   1.00%   1.00% 1.00%
1.00% convertible notes due 2026 | Convertible Notes | Level 2            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Favorable mark to market adjustments, derivative liability $ 5.9 $ 15.0 $ 18.4 $ 24.3    
Control Agreements For Interest And Fee Payments            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Restricted cash 44.4   44.4      
Standby Letters of Credit | Secured Debt            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Letters of credit, limit, amount 85.0   85.0      
Restricted cash 75.0   75.0      
Letter of credit facility, amount outstanding $ 42.3   $ 42.3