Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt securities, available-for-sale, amortized cost	$ 270,975	$ 434,119
Debt securities, available-for-sale, allowance for expected credit losses	0
Equity securities, available for sale, cost	21,142	$ 30,058
Reinsurance recoverable, allowance for credit loss	$ 200
Common stock, par value	$ 1.00	$ 1.00
Common stock, authorized shares	3,333,333	3,333,333
Common stock, issued shares	2,087,283	2,087,283
Treasury stock, shares	268,801	268,801
Senior unsecured notes due 2029 [Member]
Unamortized debt issuance cost	$ 574	$ 648
Subordinated Debt [Member]
Unamortized debt issuance cost	$ 653	$ 691