Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Loans held for investment, covered	[1]		$ 9,680
Common stock, par value (in dollars per share)		$ 1	$ 1	[1]
Common stock, authorized (in shares)		50,000,000	50,000,000	[1]
Common stock, issued (in shares)		24,134,311	24,319,076	[1]
Common stock, outstanding (in shares)		17,071,052	17,722,507	[1]
Undesignated Par Value [Member]
Preferred stock, no par value (in dollars per share)		$ 0	$ 0	[1]
Preferred stock, authorized (in shares)		1,000,000	1,000,000	[1]
Designated Par Value [Member]
Preferred stock, authorized (in shares)		25,000	25,000	[1]
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01	[1]
Preferred stock, outstanding (in shares)		0	0	[1]

[1] Derived from audited financial statements