Note 5 - Loans and Leases - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Notes receivable, gross	$ 1,795,726	$ 1,687,137
Real Estate [Member]
Notes receivable, gross	4,231	3,214
Other Collateral [Member]
Notes receivable, gross	2,847	94
Collateral Pledged [Member]
Notes receivable, gross	7,078	3,308
Commercial Portfolio Segment [Member] | Commercial [Member]
Notes receivable, gross	168,633	152,640
Commercial Portfolio Segment [Member] | Commercial [Member] | Real Estate [Member]
Notes receivable, gross	0	0
Commercial Portfolio Segment [Member] | Commercial [Member] | Other Collateral [Member]
Notes receivable, gross	2,843	55
Commercial Portfolio Segment [Member] | Commercial [Member] | Collateral Pledged [Member]
Notes receivable, gross	2,843	55
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Notes receivable, gross	382,097	337,671
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Real Estate [Member]
Notes receivable, gross	426	252
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Other Collateral [Member]
Notes receivable, gross	0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Collateral Pledged [Member]
Notes receivable, gross	426	252
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Notes receivable, gross	296,201	278,293
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Real Estate [Member]
Notes receivable, gross	2,615	2,250
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Other Collateral [Member]
Notes receivable, gross	0	0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Collateral Pledged [Member]
Notes receivable, gross	2,615	2,250
Consumer Portfolio Segment [Member] | Home Equity Loan [Member]
Notes receivable, gross	54,618	56,640
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Real Estate [Member]
Notes receivable, gross	51	70
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Other Collateral [Member]
Notes receivable, gross	0	0
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] | Collateral Pledged [Member]
Notes receivable, gross	51	70
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Notes receivable, gross	57,387	52,348
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Real Estate [Member]
Notes receivable, gross	500	364
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Other Collateral [Member]
Notes receivable, gross	0	0
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] | Collateral Pledged [Member]
Notes receivable, gross	500	364
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member]
Notes receivable, gross	83,905	112,595
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Real Estate [Member] | Nonrecourse [Member]
Notes receivable, gross	0	0
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Other Collateral [Member] | Nonrecourse [Member]
Notes receivable, gross	4	39
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Collateral Pledged [Member] | Nonrecourse [Member]
Notes receivable, gross	4	39
Consumer Portfolio Segment [Member] | Other Loan [Member]
Notes receivable, gross	23,524	16,500
Consumer Portfolio Segment [Member] | Other Loan [Member] | Real Estate [Member]
Notes receivable, gross	20
Consumer Portfolio Segment [Member] | Other Loan [Member] | Other Collateral [Member]
Notes receivable, gross	0
Consumer Portfolio Segment [Member] | Other Loan [Member] | Collateral Pledged [Member]
Notes receivable, gross	20
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Notes receivable, gross	490,442	465,010
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Real Estate [Member]
Notes receivable, gross	619	278
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Other Collateral [Member]
Notes receivable, gross	0	0
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Collateral Pledged [Member]
Notes receivable, gross	$ 619	$ 278