CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Amortized cost	$ 631,294	$ 646,728
Common stock, par value (in usd per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	51,500,000	51,500,000
Common stock, shares issued (in shares)	27,722,388	27,482,573
Common stock, shares outstanding (in shares)	27,370,227	27,130,412
Subsidiary, Sale of Stock [Line Items]
Treasury stock, common shares (in shares)	352,161	352,161
Subsidiary
Subsidiary, Sale of Stock [Line Items]
Treasury stock, common shares (in shares)	145,820	145,820