Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Investment securities held to maturity, at fair value	$ 351,204	$ 357,521
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized (in shares)	40,000,000	40,000,000
Common stock, issued (in shares)	17,006,359	16,998,929
Common stock, outstanding (in shares)	16,565,637	16,573,707
Treasury stock (in shares)	440,722	425,222