Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	[1]
Loans held for investment, covered	$ 7,503	$ 9,680
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	24,383,915	24,319,076
Common stock, outstanding (in shares)	17,334,547	17,722,507
Undesignated Par Value [Member]
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Designated Par Value [Member]
Preferred stock, authorized (in shares)	25,000	25,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, outstanding (in shares)	0	0

[1] Derived from audited financial statements