Note 6 - Loans and Allowance for Credit Losses on Loans - Impaired Financing Receivables (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Loans Individually Evaluated		$ 32,187		$ 27,523
Financing Receivable, Loans Collectively Evaluated	[1]	3,042,940		2,733,868
Financing Receivable, Total		3,075,127		2,761,391
Allowance for Credit Losses, Loans Individually Evaluated		1,415		2,096
Allowance for Credit Losses, Loans Collectively Evaluated		35,335		30,202
Allowance for Credit Losses, Total		36,750	$ 35,063	32,298	$ 32,406	$ 33,885	$ 32,246
Commercial Loans [Member]
Financing Receivable, Loans Individually Evaluated		123		177
Financing Receivable, Loans Collectively Evaluated	[1]	512,648		365,124
Financing Receivable, Total		512,771		365,301
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		5,118		3,218
Allowance for Credit Losses, Total		5,118	4,545	3,218	2,759	2,709	2,304
Commercial Real Estate Owner Occupied Professional, Medical [Member]
Financing Receivable, Loans Individually Evaluated		1,998		2,073
Financing Receivable, Loans Collectively Evaluated	[1]	118,482		148,686
Financing Receivable, Total		120,480		150,759
Allowance for Credit Losses, Loans Individually Evaluated		222		199
Allowance for Credit Losses, Loans Collectively Evaluated		727		893
Allowance for Credit Losses, Total		949	1,180	1,092	1,011	986	954
Commercial Real Estate Owner Occupied, Retail [Member]
Financing Receivable, Loans Individually Evaluated		5,227		5,559
Financing Receivable, Loans Collectively Evaluated	[1]	184,969		184,745
Financing Receivable, Total		190,196		190,304
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		1,571		1,362
Allowance for Credit Losses, Total		1,571	1,597	1,362	1,728	3,519	3,173
Commercial Real Estate Owner Occupied, Other [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	162,622		143,645
Financing Receivable, Total		162,622		143,645
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		453		575
Allowance for Credit Losses, Total		453	457	575	602	556	610
Commercial Real Estate Nonowner Occupied Hotels and Motels [Member]
Financing Receivable, Loans Individually Evaluated		2,962		3,085
Financing Receivable, Loans Collectively Evaluated	[1]	142,777		125,365
Financing Receivable, Total		145,739		128,450
Allowance for Credit Losses, Loans Individually Evaluated		0		669
Allowance for Credit Losses, Loans Collectively Evaluated		1,252		1,863
Allowance for Credit Losses, Total		1,252		2,532
Commercial Real Estate Nonowner Occupied Mini Storage [Member]
Financing Receivable, Loans Individually Evaluated		0		1,058
Financing Receivable, Loans Collectively Evaluated	[1]	51,508		57,987
Financing Receivable, Total		51,508		59,045
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		86		133
Allowance for Credit Losses, Total		86	97	133	176	157	337
Multifamily [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	271,015		233,157
Financing Receivable, Total		271,015		233,157
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		2,212		1,821
Allowance for Credit Losses, Total		2,212	2,330	1,821	1,865	1,637	1,547
Commercial Real Estate Nonowner Occupied, Retail [Member]
Financing Receivable, Loans Individually Evaluated		9,978		2,693
Financing Receivable, Loans Collectively Evaluated	[1]	181,698		160,065
Financing Receivable, Total		191,676		162,758
Allowance for Credit Losses, Loans Individually Evaluated		97		0
Allowance for Credit Losses, Loans Collectively Evaluated		1,286		1,074
Allowance for Credit Losses, Total		1,383	1,891	1,074	1,578	1,471	981
Commercial Real Estate Nonowner Occupied, Other [Member]
Financing Receivable, Loans Individually Evaluated		5,526		5,726
Financing Receivable, Loans Collectively Evaluated	[1]	295,163		276,895
Financing Receivable, Total		300,689		282,621
Allowance for Credit Losses, Loans Individually Evaluated		292		69
Allowance for Credit Losses, Loans Collectively Evaluated		1,889		1,751
Allowance for Credit Losses, Total		2,181	2,103	1,820	1,755	1,425	1,104
Land and Land Improvements [Member]
Financing Receivable, Loans Individually Evaluated		1,428		2,004
Financing Receivable, Loans Collectively Evaluated	[1]	103,009		98,801
Financing Receivable, Total		104,437		100,805
Allowance for Credit Losses, Loans Individually Evaluated		520		723
Allowance for Credit Losses, Loans Collectively Evaluated		2,987		2,745
Allowance for Credit Losses, Total		3,507	3,600	3,468	3,541	3,705	4,084
Construction Loans [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	248,564		146,038
Financing Receivable, Total		248,564		146,038
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		9,852		6,346
Allowance for Credit Losses, Total		9,852	8,208	6,346	5,976	6,217	4,648
Residential 1-4 Family Real Estate, Personal Residence [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	258,590		262,805
Financing Receivable, Total		258,590		262,805
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		2,665		2,765
Allowance for Credit Losses, Total		2,665	2,669	2,765	2,851	3,050	3,559
Residential 1-4 Family Real Estate, Rental Small Loan [Member]
Financing Receivable, Loans Individually Evaluated		1,412		1,463
Financing Receivable, Loans Collectively Evaluated	[1]	122,200		120,526
Financing Receivable, Total		123,612		121,989
Allowance for Credit Losses, Loans Individually Evaluated		284		436
Allowance for Credit Losses, Loans Collectively Evaluated		1,697		2,398
Allowance for Credit Losses, Total		1,981	2,097	2,834	2,757	2,546	2,736
Residential 1-4 Family Real Estate, Rental Large Loan [Member]
Financing Receivable, Loans Individually Evaluated		3,061		3,162
Financing Receivable, Loans Collectively Evaluated	[1]	84,388		75,946
Financing Receivable, Total		87,449		79,108
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		2,623		2,374
Allowance for Credit Losses, Total		2,623	2,181	2,374	2,287	2,431	3,007
Home Equity Loan [Member]
Financing Receivable, Loans Individually Evaluated		472		523
Financing Receivable, Loans Collectively Evaluated	[1]	72,284		71,589
Financing Receivable, Total		72,756		72,112
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		427		497
Allowance for Credit Losses, Total		427		497
Mortgage Warehouse Lines [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	194,740		227,869
Financing Receivable, Total		194,740		227,869
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		0		0
Allowance for Credit Losses, Total		0	0	0	0	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	35,116		31,923
Financing Receivable, Total		35,116		31,923
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		176		163
Allowance for Credit Losses, Total		176	254	163	169	172	216
Credit Card Receivable [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	2,032		1,891
Financing Receivable, Total		2,032		1,891
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		17		17
Allowance for Credit Losses, Total		17	17	17	17	16	17
Bank Overdrafts [Member]
Financing Receivable, Loans Individually Evaluated		0		0
Financing Receivable, Loans Collectively Evaluated	[1]	1,135		811
Financing Receivable, Total		1,135		811
Allowance for Credit Losses, Loans Individually Evaluated		0		0
Allowance for Credit Losses, Loans Collectively Evaluated		297		207
Allowance for Credit Losses, Total		$ 297	$ 279	$ 207	$ 197	$ 168	$ 121

[1] Included in the loans collectively evaluated are $9.7 million in fully guaranteed or cash secured loans, which are excluded from the pools collectively evaluated and carry no allowance.