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Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principles - Schedule of Restricted Cash and Restricted Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Restricted Cash and Cash Equivalents Items [Line Items]      
Total restricted cash and restricted investments $ 68,331 $ 30,632 $ 34,451
Current restricted cash 51,594 13,768  
Total current restricted cash and restricted investments 51,594 13,768  
Non-current restricted cash 16,737 16,864  
Total non-current restricted cash and restricted investments 16,737 16,864  
Collateral for letters of credit for facility leases      
Restricted Cash and Cash Equivalents Items [Line Items]      
Total restricted cash and restricted investments 2,219 2,132  
Collateral with financial institutions      
Restricted Cash and Cash Equivalents Items [Line Items]      
Total restricted cash and restricted investments 16,331 16,237  
Claims processing services      
Restricted Cash and Cash Equivalents Items [Line Items]      
Total restricted cash and restricted investments $ 49,781 $ 12,263