Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Other Assets [Abstract]
Loaned securities	$ 149,541	$ 112,139
Company-owned life insurance	107,489	105,331
Prepaid reinsurance premiums	106,178	141,402
Right-of-use assets	17,320	21,099
Other	39,955	47,053
Total other assets	$ 420,483	$ 427,024