Note 12 - Condensed Financial Statements of Parent Company - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income
Realized securities gains, net	$ 566	$ 17	$ 14
Other income	1,643	1,005	1,148
Expenses
Income before income tax benefit and equity in undistributed net income of subsidiaries	20,677	18,711	20,385
Applicable income tax benefit	3,211	2,560	6,293
Net income	17,466	16,151	14,092
Parent Company [Member]
Income
Dividends from subsidiaries	28,556	9,419	8,141
Interest on securities – taxable
Realized securities gains, net			4
Other income	18	10	1,018
Total income	28,574	9,429	9,163
Expenses
Other expenses	1,025	1,244	1,986
Income before income tax benefit and equity in undistributed net income of subsidiaries	27,549	8,185	7,177
Applicable income tax benefit	266	308	383
Income before equity in undistributed net income of subsidiaries	27,815	8,493	7,560
Equity (deficit) in undistributed net income of subsidiaries	(10,349)	7,658	6,532
Net income	$ 17,466	$ 16,151	$ 14,092