Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands	Dec. 31, 2020	Dec. 31, 2019
Loans, allowance for loan losses	$ 9,902,000	$ 7,243,000
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	22,500,000	22,500,000
Common stock, shares issued (in shares)	5,182,232	5,165,760
Common stock, shares oustanding (in shares)	5,182,232	5,165,760