Note 2 - Loans and Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Beginning balance January 1,	$ 39,632	$ 38,539
Provision for credit losses on loans	1,892
Charge-offs	(287)	(228)
Recoveries	105	192
Balance	33,778	39,330
Ending balance individually evaluated for impairment			$ 0
Ending balance collectively evaluated for impairment			39,632
Loans and Leases Receivable, Gross	2,637,483		2,495,938
Loans			665
Ending balance collectively evaluated for impairment			2,495,273
Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	(7,564)
Residential 1 to 4 Family [Member]
Provision		(200)
Multifamily Real Estate [Member]
Provision		549
Commercial Real Estate [Member]
Provision		496
Construction Loans [Member]
Provision		(83)
Farmland [Member]
Provision		(27)
Second Mortgages [Member]
Provision		92
Home Equity Line of Credit [Member]
Provision		827
Real Estate Portfolio Segment [Member] \| Residential 1 to 4 Family [Member]
Beginning balance January 1,	9,242	8,203
Provision for credit losses on loans	53
Charge-offs	0	0
Recoveries	8	38
Balance	5,910	8,041
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment			9,242
Loans and Leases Receivable, Gross	703,198		689,579
Loans			134
Ending balance collectively evaluated for impairment			689,445
Real Estate Portfolio Segment [Member] \| Residential 1 to 4 Family [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	(3,393)
Real Estate Portfolio Segment [Member] \| Commercial and Multifamily [Member]
Beginning balance January 1,	16,846	18,343
Provision for credit losses on loans	619
Charge-offs	0	0
Recoveries	0	0
Balance	14,032	18,892
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment			16,846
Loans and Leases Receivable, Gross	956,059		908,673
Loans			531
Ending balance collectively evaluated for impairment			908,142
Real Estate Portfolio Segment [Member] \| Commercial and Multifamily [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	(3,433)
Real Estate Portfolio Segment [Member] \| Construction, Land Development and Farmland [Member]
Beginning balance January 1,	9,757	8,090
Provision for credit losses on loans	902
Charge-offs	0	(1)
Recoveries	3	15
Balance	10,396	8,600
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment			9,757
Loans and Leases Receivable, Gross	678,516		612,659
Loans			0
Ending balance collectively evaluated for impairment			612,659
Real Estate Portfolio Segment [Member] \| Construction, Land Development and Farmland [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	(266)
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member]
Beginning balance January 1,	1,098	997
Provision for credit losses on loans	83
Charge-offs	0	0
Recoveries	0	0
Balance	857	970
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment			1,098
Loans and Leases Receivable, Gross	103,358		92,229
Loans			0
Ending balance collectively evaluated for impairment			92,229
Real Estate Portfolio Segment [Member] \| Home Equity Loan [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	(324)
Commercial, Industrial and Agricultural Portfolio [Member]
Beginning balance January 1,	1,329	1,391
Provision for credit losses on loans	33
Charge-offs	0	(3)
Recoveries	7	0
Balance	1,588	1,305
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment			1,329
Loans and Leases Receivable, Gross	118,006		118,155
Loans			0
Ending balance collectively evaluated for impairment			118,155
Commercial, Industrial and Agricultural Portfolio [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	219
Consumer Portfolio Segment [Member]
Beginning balance January 1,	1,360	1,515
Provision for credit losses on loans	202
Charge-offs	(287)	(224)
Recoveries	87	139
Balance	995	$ 1,522
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment			1,360
Loans and Leases Receivable, Gross	78,346		74,643
Loans			0
Ending balance collectively evaluated for impairment			$ 74,643
Consumer Portfolio Segment [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance January 1,	$ (367)

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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