Note 9 - Loans - Nonaccrual Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Loans with no related allowance, unpaid principal balance	$ 79,509	$ 74,673
Loans with no related allowance, recorded investment	56,028	54,140
Loans with related allowance, unpaid principal balance	14,296	16,539
Loans with related allowance, recorded investment	12,976	14,714
Allowance	5,664	3,941
Unpaid principal balance	93,805	91,212
Non-accrual loans	69,004	68,854
Commercial Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	17,132	27,341
Loans with no related allowance, recorded investment	4,598	12,949
Loans with related allowance, unpaid principal balance	14,296	14,643
Loans with related allowance, recorded investment	12,976	12,823
Allowance	5,664	3,734
Commercial Real Estate Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	49,759	37,697
Loans with no related allowance, recorded investment	39,558	32,205
Loans with related allowance, unpaid principal balance		1,896
Loans with related allowance, recorded investment		1,891
Allowance		207
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	12,618	9,626
Loans with no related allowance, recorded investment	$ 11,872	8,978
Installment and Other Loans [Member ]
Loans with no related allowance, unpaid principal balance		9
Loans with no related allowance, recorded investment		$ 8