Note 2 - Loans and Allowance for Credit Losses - Loan Portfolio by Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
2022	$ 782,457
2021	794,975
2020	400,961
2019	210,939
2018	118,630
Prior	299,539
Revolving loans	397,783
Loans, before allowance	2,991,325	$ 2,483,914
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	3,005,284	2,495,938
Pass [Member]
2022	782,364
2021	794,889
2020	399,817
2019	210,804
2018	118,500
Prior	295,930
Revolving loans	397,306
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	2,999,610	2,488,252
Special Mention [Member]
2022	19
2021	72
2020	1,093
2019	3
2018	116
Prior	2,161
Revolving loans	360
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	3,824	5,855
Substandard [Member]
2022	74
2021	14
2020	51
2019	132
2018	14
Prior	1,448
Revolving loans	117
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	1,850	1,831
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member]
2022	234,604
2021	259,368
2020	112,183
2019	63,741
2018	31,064
Prior	89,635
Revolving loans	21,838
Loans, before allowance	812,433
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	812,433	689,579
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Pass [Member]
2022	234,604
2021	259,368
2020	111,245
2019	63,610
2018	30,948
Prior	86,292
Revolving loans	21,489
Loans, before allowance	807,556
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		682,527
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Special Mention [Member]
2022	0
2021	0
2020	901
2019	0
2018	116
Prior	2,005
Revolving loans	349
Loans, before allowance	3,371
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		5,566
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Substandard [Member]
2022	0
2021	0
2020	37
2019	131
2018	0
Prior	1,338
Revolving loans	0
Loans, before allowance	1,506
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		1,486
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member]
2022	198,521
2021	228,852
2020	163,731
2019	109,657
2018	75,934
Prior	187,703
Revolving loans	29,249
Loans, before allowance	993,647
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	993,647	908,673
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Pass [Member]
2022	198,521
2021	228,852
2020	163,568
2019	109,657
2018	75,934
Prior	187,572
Revolving loans	29,249
Loans, before allowance	993,353
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		908,409
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Special Mention [Member]
2022	0
2021	0
2020	163
2019	0
2018	0
Prior	40
Revolving loans	0
Loans, before allowance	203
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Substandard [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	91
Revolving loans	0
Loans, before allowance	91
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		264
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member]
2022	300,954
2021	279,972
2020	88,983
2019	10,153
2018	5,551
Prior	10,153
Revolving loans	157,560
Loans, before allowance	853,326
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	853,326	612,659
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Pass [Member]
2022	300,954
2021	279,972
2020	88,983
2019	10,153
2018	5,551
Prior	10,074
Revolving loans	157,560
Loans, before allowance	853,247
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		612,537
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Special Mention [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	61
Revolving loans	0
Loans, before allowance	61
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		93
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Substandard [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	18
Revolving loans	0
Loans, before allowance	18
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		29
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving loans	142,043
Loans, before allowance	142,043
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	142,043	92,229
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Pass [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving loans	141,915
Loans, before allowance	141,915
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		92,208
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Special Mention [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving loans	11
Loans, before allowance	11
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		11
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Substandard [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving loans	117
Loans, before allowance	117
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		10
Commercial, Industrial and Agricultural Portfolio [Member]
2022	25,034
2021	13,353
2020	28,631
2019	20,980
2018	5,581
Prior	5,115
Revolving loans	25,421
Loans, before allowance	124,115
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	124,115	118,155
Commercial, Industrial and Agricultural Portfolio [Member] | Pass [Member]
2022	25,034
2021	13,332
2020	28,612
2019	20,980
2018	5,581
Prior	5,060
Revolving loans	25,421
Loans, before allowance	124,020
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		118,058
Commercial, Industrial and Agricultural Portfolio [Member] | Special Mention [Member]
2022	0
2021	21
2020	19
2019	0
2018	0
Prior	55
Revolving loans	0
Loans, before allowance	95
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		96
Commercial, Industrial and Agricultural Portfolio [Member] | Substandard [Member]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving loans	0
Loans, before allowance	0
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		1
Consumer Portfolio Segment [Member]
2022	23,344
2021	13,430
2020	7,433
2019	6,408
2018	500
Prior	6,933
Revolving loans	21,672
Loans, before allowance	79,720
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process	79,720	74,643
Consumer Portfolio Segment [Member] | Pass [Member]
2022	23,251
2021	13,365
2020	7,409
2019	6,404
2018	486
Prior	6,932
Revolving loans	21,672
Loans, before allowance	79,519
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		74,513
Consumer Portfolio Segment [Member] | Special Mention [Member]
2022	19
2021	51
2020	10
2019	3
2018	0
Prior	0
Revolving loans	0
Loans, before allowance	83
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		89
Consumer Portfolio Segment [Member] | Substandard [Member]
2022	74
2021	14
2020	14
2019	1
2018	14
Prior	1
Revolving loans	0
Loans, before allowance	$ 118
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process		$ 41