Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Available-for-sale, amortized cost	$ 936,998	$ 972,315
Common stock, par value (in dollars per share)	$ 2.00	$ 2.00
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	11,579,696	11,473,256
Common stock, shares outstanding (in shares)	11,579,696	11,473,256
Accumulated other comprehensive losses, taxes	$ 35,846	$ 39,073