Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Held-to-maturity, fair value	$ 348,505	$ 330,626
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized (in shares)	20,000,000	20,000,000
Common stock, issued (in shares)	16,094,486	16,056,282
Common stock, outstanding (in shares)	15,886,143	15,957,830
Treasury stock (in shares)	208,343	98,452