Note 14 - Federal and State Income Taxes - Reconciliation of the Expected Federal Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
INCOME TAXES
Computed "expected" tax expense	$ 23,845	$ 25,508	$ 15,391
Tax exempt income, net	(10,689)	(7,537)	(5,943)
Bank-owned life insurance	(432)	(386)	(308)
State income taxes, net of federal benefit, current year	4,482	5,089	3,622
Change in unrecognized tax benefits	498	578	546
Goodwill impairment			105
Intended liquidation of bank-owned life insurance	(1,181)
Tax credits	(1,362)	34
Tax Credits			(456)
Acquisition costs	276	95
Excess tax benefit on stock options exercised and restricted stock awards vested	(503)	(436)	(242)
Re-measurement of deferred tax asset to incorporate newly enacted tax rates			207
Other	(451)	(383)	(215)
Federal and state income tax expense	$ 14,483	$ 22,562	$ 12,707
Computed "expected" tax expense (in percentage)	21.00%	21.00%	21.00%
Tax exempt income, net (in percentage)	(9.40%)	(6.20%)	(8.10%)
Bank-owned life insurance (in percentage)	(0.40%)	(0.30%)	(0.40%)
State income taxes, net of federal benefit, current year (in percentage)	3.90%	4.20%	4.90%
Change in unrecognized tax benefits (in percentage)	0.40%	0.50%	0.70%
Goodwill impairment (in percentage)			0.10%
Intended liquidation of bank-owned life insurance (in percentage)	(1.00%)
Provision adjustment from accounting method change (in percentage)			(0.30%)
Tax credits (in percentage)	(1.20%)		(0.60%)
Acquisition costs (in percentage)	0.20%	0.10%
Excess tax benefit on stock options exercised and restricted stock awards vested (in percentage)	(0.40%)	(0.40%)	(0.30%)
Other (in percentage)	(0.40%)	(0.30%)	(0.30%)
Federal and state income tax expense (in percentage)	12.70%	18.60%	17.30%