Note 7 - Loans and the Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Loans	$ 4,992,785	$ 4,606,176
Total allowance, write off	6,429	2,821
Pass [Member]
Loans	4,921,631	4,523,041
Special Mention [Member]
Loans	40,629	48,976
Substandard [Member]
Loans	27,856	27,924
Doubtful [Member]
Loans	2,669	6,235
Loss [Member]
Loans	0
Commercial Real Estate Portfolio Segment [Member]
Loans	3,570,120	3,398,858
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans		3,332,445
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans		42,330
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans		20,560
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans		3,523
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member]
Total loan, current year	228,986
Write off, current year	0
Total loan, one year before	753,558
Write off, one year before	0
Total loan, two years before	433,864
Write off, two years before	357
Total loan, three years before	155,407
Write off, three years before	0
Total loan, four years before	156,806
Write off, four years before	1,447
Total loan, prior	389,121
Write off, prior	245
Total loan, Revolving	100,186
Revolving, write off	0
Total loan, Revolving Loans Converted to Term	0
Revolving Loans Converted to Term, write off	0
Loans	2,217,928	2,020,406
Total allowance, write off	2,049	51
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member] | Pass [Member]
Total loan, current year	228,902
Total loan, one year before	751,649
Total loan, two years before	427,269
Total loan, three years before	151,848
Total loan, four years before	149,946
Total loan, prior	379,503
Total loan, Revolving	99,723
Total loan, Revolving Loans Converted to Term	0
Loans	2,188,840	1,972,611
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member] | Special Mention [Member]
Total loan, current year	0
Total loan, one year before	1,909
Total loan, two years before	6,103
Total loan, three years before	3,551
Total loan, four years before	5,556
Total loan, prior	1,313
Total loan, Revolving	226
Total loan, Revolving Loans Converted to Term	0
Loans	18,658	35,054
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member] | Substandard [Member]
Total loan, current year	84
Total loan, one year before	0
Total loan, two years before	492
Total loan, three years before	8
Total loan, four years before	372
Total loan, prior	7,970
Total loan, Revolving	237
Total loan, Revolving Loans Converted to Term	0
Loans	9,163	10,478
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member] | Doubtful [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	932
Total loan, prior	335
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	1,267	2,263
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member] | Loss [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Total loan, current year	131,617
Write off, current year	0
Total loan, one year before	322,741
Write off, one year before	0
Total loan, two years before	89,268
Write off, two years before	0
Total loan, three years before	22,562
Write off, three years before	0
Total loan, four years before	21,077
Write off, four years before	1
Total loan, prior	21,526
Write off, prior	35
Total loan, Revolving	61,007
Revolving, write off	0
Total loan, Revolving Loans Converted to Term	0
Revolving Loans Converted to Term, write off	0
Loans	669,798	722,074
Total allowance, write off	36	16
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Total loan, current year	131,617
Total loan, one year before	322,032
Total loan, two years before	85,438
Total loan, three years before	22,515
Total loan, four years before	19,402
Total loan, prior	20,180
Total loan, Revolving	60,612
Total loan, Revolving Loans Converted to Term	0
Loans	661,796	716,071
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Total loan, current year	0
Total loan, one year before	647
Total loan, two years before	2,601
Total loan, three years before	31
Total loan, four years before	0
Total loan, prior	413
Total loan, Revolving	395
Total loan, Revolving Loans Converted to Term	0
Loans	4,087	3,496
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Total loan, current year	0
Total loan, one year before	62
Total loan, two years before	1,229
Total loan, three years before	16
Total loan, four years before	1,675
Total loan, prior	588
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	3,570	2,157
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	345
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	345	350
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Loss [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	0
Commercial Real Estate Portfolio Segment [Member] | Residential [Member]
Total loan, current year	76,662
Write off, current year	0
Total loan, one year before	171,086
Write off, one year before	0
Total loan, two years before	99,037
Write off, two years before	11
Total loan, three years before	69,244
Write off, three years before	1
Total loan, four years before	57,194
Write off, four years before	22
Total loan, prior	105,245
Write off, prior	7
Total loan, Revolving	103,906
Revolving, write off	1
Total loan, Revolving Loans Converted to Term	20
Revolving Loans Converted to Term, write off	0
Loans	682,394	656,378
Total allowance, write off	42	191
Commercial Real Estate Portfolio Segment [Member] | Residential [Member] | Pass [Member]
Total loan, current year	76,662
Total loan, one year before	170,229
Total loan, two years before	98,329
Total loan, three years before	68,281
Total loan, four years before	54,902
Total loan, prior	97,716
Total loan, Revolving	103,252
Total loan, Revolving Loans Converted to Term	20
Loans	669,391	643,763
Commercial Real Estate Portfolio Segment [Member] | Residential [Member] | Special Mention [Member]
Total loan, current year	0
Total loan, one year before	433
Total loan, two years before	0
Total loan, three years before	386
Total loan, four years before	1,112
Total loan, prior	1,230
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	3,161	3,780
Commercial Real Estate Portfolio Segment [Member] | Residential [Member] | Substandard [Member]
Total loan, current year	0
Total loan, one year before	410
Total loan, two years before	708
Total loan, three years before	520
Total loan, four years before	1,061
Total loan, prior	6,000
Total loan, Revolving	654
Total loan, Revolving Loans Converted to Term	0
Loans	9,353	7,925
Commercial Real Estate Portfolio Segment [Member] | Residential [Member] | Doubtful [Member]
Total loan, current year	0
Total loan, one year before	14
Total loan, two years before	0
Total loan, three years before	57
Total loan, four years before	119
Total loan, prior	299
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	489	910
Commercial Real Estate Portfolio Segment [Member] | Residential [Member] | Loss [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	0
Commercial Portfolio Segment [Member]
Total loan, current year	305,308
Write off, current year	0
Total loan, one year before	269,572
Write off, one year before	247
Total loan, two years before	142,718
Write off, two years before	25
Total loan, three years before	50,401
Write off, three years before	49
Total loan, four years before	22,592
Write off, four years before	1,632
Total loan, prior	65,601
Write off, prior	658
Total loan, Revolving	502,371
Revolving, write off	202
Total loan, Revolving Loans Converted to Term	275
Revolving Loans Converted to Term, write off	0
Loans	1,358,838	1,153,873
Total allowance, write off	2,813	2,139
Commercial Portfolio Segment [Member] | Pass [Member]
Total loan, current year	303,160
Total loan, one year before	267,678
Total loan, two years before	136,291
Total loan, three years before	48,990
Total loan, four years before	21,137
Total loan, prior	61,166
Total loan, Revolving	499,642
Total loan, Revolving Loans Converted to Term	275
Loans	1,338,339	1,137,555
Commercial Portfolio Segment [Member] | Special Mention [Member]
Total loan, current year	1,439
Total loan, one year before	698
Total loan, two years before	5,483
Total loan, three years before	448
Total loan, four years before	584
Total loan, prior	3,843
Total loan, Revolving	2,128
Total loan, Revolving Loans Converted to Term	0
Loans	14,623	6,646
Commercial Portfolio Segment [Member] | Substandard [Member]
Total loan, current year	709
Total loan, one year before	1,196
Total loan, two years before	928
Total loan, three years before	921
Total loan, four years before	640
Total loan, prior	341
Total loan, Revolving	573
Total loan, Revolving Loans Converted to Term	0
Loans	5,308	6,960
Commercial Portfolio Segment [Member] | Doubtful [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	16
Total loan, three years before	42
Total loan, four years before	231
Total loan, prior	251
Total loan, Revolving	28
Total loan, Revolving Loans Converted to Term	0
Loans	568	2,712
Commercial Portfolio Segment [Member] | Loss [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	0
Consumer Portfolio Segment [Member]
Total loan, current year	11,245
Write off, current year	8
Total loan, one year before	7,246
Write off, one year before	78
Total loan, two years before	3,427
Write off, two years before	29
Total loan, three years before	1,938
Write off, three years before	11
Total loan, four years before	2,399
Write off, four years before	18
Total loan, prior	18,372
Write off, prior	61
Total loan, Revolving	19,074
Revolving, write off	1,284
Total loan, Revolving Loans Converted to Term	126
Revolving Loans Converted to Term, write off	0
Loans	63,827	53,445
Total allowance, write off	1,489	424
Consumer Portfolio Segment [Member] | Pass [Member]
Total loan, current year	11,245
Total loan, one year before	7,219
Total loan, two years before	3,372
Total loan, three years before	1,850
Total loan, four years before	2,359
Total loan, prior	18,280
Total loan, Revolving	18,814
Total loan, Revolving Loans Converted to Term	126
Loans	63,265	53,041
Consumer Portfolio Segment [Member] | Special Mention [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	100
Total loan, Revolving Loans Converted to Term	0
Loans	100	0
Consumer Portfolio Segment [Member] | Substandard [Member]
Total loan, current year	0
Total loan, one year before	27
Total loan, two years before	55
Total loan, three years before	88
Total loan, four years before	40
Total loan, prior	92
Total loan, Revolving	160
Total loan, Revolving Loans Converted to Term	0
Loans	462	404
Consumer Portfolio Segment [Member] | Doubtful [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	0	$ 0
Consumer Portfolio Segment [Member] | Loss [Member]
Total loan, current year	0
Total loan, one year before	0
Total loan, two years before	0
Total loan, three years before	0
Total loan, four years before	0
Total loan, prior	0
Total loan, Revolving	0
Total loan, Revolving Loans Converted to Term	0
Loans	$ 0