Other Assets - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Other Assets [Abstract]
Loaned securities	$ 141,614	$ 203,693
Company-owned life insurance	109,980	106,417
Prepaid reinsurance premiums	78,845	100,443
Other	54,227	49,252
Total other assets	$ 384,666	$ 459,805