Other Assets and Liabilities - Schedule of Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Other Assets and Liabilities [Abstract]
Amount payable under securities lending agreements	$ 125,723	$ 149,364
Reinsurance funds withheld	121,983	130,564
Accrued compensation	55,971	47,771
Lease liability	37,442	44,693
Current federal income taxes	23,290	20,761
Deferred ceding commissions	14,437	19,962
Other	52,710	60,648
Total other liabilities	$ 431,556	$ 473,763