Note 3 - Loans and Allowance for Credit Losses on Loans - Aging of the Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Loans	$ 6,850,273	$ 6,520,402
Commercial Real Estate Portfolio Segment [Member]
Loans	3,000,674	2,838,788
Commercial and Industrial Portfolio Segment [Member]
Loans	1,491,143	1,438,654
Residential Real Estate Portfolio Segment [Member]
Loans	1,242,068	1,187,824
Construction and Development [Member]
Loans	671,011	623,005
Consumer Portfolio Segment [Member]
Loans	140,715	144,644
Finance Leases Portfolio Segment [Member]
Loans	14,563	15,514
Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,989,982	1,835,935
Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	390,784	382,744
Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,010,692	1,002,853
Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	851,284	805,080
Term, Excluding PPP [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	856,838	884,399
Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	634,305	554,255
Home Equity Line of Credit [Member]
Loans	263,826	247,433
Credit Card Receivable [Member]
Loans	26,273	24,540
Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Loans	26,273	24,540
Financial Asset, Not Past Due [Member]
Loans	6,813,413	6,487,947
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	2,989,314	2,832,486
Financial Asset, Not Past Due [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	1,488,735	1,432,252
Financial Asset, Not Past Due [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	1,222,538	1,170,463
Financial Asset, Not Past Due [Member] | Construction and Development [Member]
Loans	669,650	622,614
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	139,732	143,796
Financial Asset, Not Past Due [Member] | Finance Leases Portfolio Segment [Member]
Loans	14,563	15,514
Financial Asset, Not Past Due [Member] | Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,981,314	1,831,135
Financial Asset, Not Past Due [Member] | Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	388,400	381,177
Financial Asset, Not Past Due [Member] | Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,008,000	1,001,351
Financial Asset, Not Past Due [Member] | Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	834,138	789,286
Financial Asset, Not Past Due [Member] | Term, Excluding PPP [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	854,886	879,597
Financial Asset, Not Past Due [Member] | Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	633,849	552,655
Financial Asset, Not Past Due [Member] | Home Equity Line of Credit [Member]
Loans	262,962	246,700
Financial Asset, Not Past Due [Member] | Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Loans	25,919	24,122
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	12,674	10,848
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,764	816
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	733	162
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	9,252	8,365
Financial Asset, 30 to 59 Days Past Due [Member] | Construction and Development [Member]
Loans	0	391
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	456	470
Financial Asset, 30 to 59 Days Past Due [Member] | Finance Leases Portfolio Segment [Member]
Loans	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,274	168
Financial Asset, 30 to 59 Days Past Due [Member] | Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	472	628
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	490	648
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	8,780	7,737
Financial Asset, 30 to 59 Days Past Due [Member] | Term, Excluding PPP [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	297	103
Financial Asset, 30 to 59 Days Past Due [Member] | Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	436	59
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line of Credit [Member]
Loans	286	424
Financial Asset, 30 to 59 Days Past Due [Member] | Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Loans	183	220
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	8,698	12,909
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	3,350	5,125
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	518	4,262
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	4,055	3,232
Financial Asset, 60 to 89 Days Past Due [Member] | Construction and Development [Member]
Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	156	69
Financial Asset, 60 to 89 Days Past Due [Member] | Finance Leases Portfolio Segment [Member]
Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	3,128	4,410
Financial Asset, 60 to 89 Days Past Due [Member] | Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	208	56
Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	222	715
Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	3,847	3,176
Financial Asset, 60 to 89 Days Past Due [Member] | Term, Excluding PPP [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	518	2,740
Financial Asset, 60 to 89 Days Past Due [Member] | Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	0	1,522
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member]
Loans	578	194
Financial Asset, 60 to 89 Days Past Due [Member] | Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Loans	41	27
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	15,488	8,698
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	6,246	361
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	1,157	1,978
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	6,223	5,764
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction and Development [Member]
Loans	1,361	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	371	309
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Finance Leases Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	4,266	222
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	1,704	883
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	1,980	139
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	4,519	4,881
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Term, Excluding PPP [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	1,137	1,959
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	20	19
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Line of Credit [Member]
Loans	0	115
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Loans	130	171
Financial Asset, Past Due [Member]
Loans	36,860	32,455
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	11,360	6,302
Financial Asset, Past Due [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	2,408	6,402
Financial Asset, Past Due [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	19,530	17,361
Financial Asset, Past Due [Member] | Construction and Development [Member]
Loans	1,361	391
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member]
Loans	983	848
Financial Asset, Past Due [Member] | Finance Leases Portfolio Segment [Member]
Loans	0	0
Financial Asset, Past Due [Member] | Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	8,668	4,800
Financial Asset, Past Due [Member] | Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	2,384	1,567
Financial Asset, Past Due [Member] | Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	2,692	1,502
Financial Asset, Past Due [Member] | Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Loans	17,146	15,794
Financial Asset, Past Due [Member] | Term, Excluding PPP [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	1,952	4,802
Financial Asset, Past Due [Member] | Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Loans	456	1,600
Financial Asset, Past Due [Member] | Home Equity Line of Credit [Member]
Loans	864	733
Financial Asset, Past Due [Member] | Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Loans	$ 354	$ 418