Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale, Amortized Cost	$ 990,792	$ 985,599
Financing receivable, allowance for credit losses	$ 41,830	$ 38,178
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	72,010	72,010
Preferred stock, Liquidation Preference	$ 1,000	$ 1,000
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	25,319,520	25,110,313
Common stock, shares outstanding (in shares)	25,319,520	25,110,313