Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Available-for-sale, amortized cost	$ 576,178	$ 649,217
Equity securities, cost	$ 5,695	$ 12,091
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	3,861,940	3,796,948
Common stock, shares outstanding (in shares)	3,653,254	3,588,262
Treasury stock, shares (in shares)	208,686	208,686