Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment securities:
Held-to-maturity, at fair value	$ 2,979	$ 2,954
Available-for-sale, amotized cost	$ 1,406,923	$ 1,432,372
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 4	$ 4
Common stock, authorized (in shares)	30,000,000	30,000,000
Common stock, issued (in shares)	21,158,977	21,091,466
Common stock, outstanding (in shares)	20,519,717	20,452,376
Treasury stock (in shares)	639,260	639,090