Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Investment securities held to maturity, at fair value	$ 352,454	$ 348,505
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)	16,098,354	16,094,486
Common stock, outstanding (in shares)	15,890,011	15,886,143
Treasury stock (in shares)	208,343	208,343