Unpaid Claims - Schedule of Paid Claims (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Claims Development [Line Items]
Cumulative net paid claims	$ 3,708,697	$ 2,985,295	$ 2,002,287
2021 and prior
Claims Development [Line Items]
Cumulative net paid claims	1,936,643	2,092,800	2,002,287
2022
Claims Development [Line Items]
Cumulative net paid claims	906,124	892,495	0
2023
Claims Development [Line Items]
Cumulative net paid claims	$ 865,930	$ 0	$ 0