Note 5 - Loans - Nonaccrual Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Loans with no related allowance, unpaid principal balance	$ 79,899	$ 116,221
Loans with no related allowance, recorded investment	70,425	86,127
Loans with related allowance, unpaid principal balance	20,632	31,325
Loans with related allowance, recorded investment	16,853	26,236
Allowance	1,193	12,341
Unpaid principal balance	100,531	147,546
Recorded investment	87,278	112,363
Commercial Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	4,851	25,154
Loans with no related allowance, recorded investment	4,764	14,899
Loans with related allowance, unpaid principal balance	5,042	6,887
Loans with related allowance, recorded investment	2,424	6,599
Allowance	1,125	3,409
Commercial Real Estate Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	55,125	58,213
Loans with no related allowance, recorded investment	46,483	39,874
Loans with related allowance, unpaid principal balance	841	24,438
Loans with related allowance, recorded investment	763	19,637
Allowance	9	8,932
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	19,923	32,854
Loans with no related allowance, recorded investment	19,178	$ 31,354
Loans with related allowance, unpaid principal balance	14,749
Loans with related allowance, recorded investment	13,666
Allowance	$ 59