CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Amortized cost	$ 635,247	$ 646,728
Common stock, par value (in usd per share)	$ 1	$ 1
Treasury stock (in shares)	352,161	352,161
Common stock, shares outstanding (in shares)	27,266,830	27,130,412