Note 7 - Loans and Related Allowance for Credit Losses - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Modified, Amortized cost	$ 22,894	$ 20,633
Total Financing Receivables, Percentage	1.50%	1.40%
Payment Deferral [Member]
Modified, Amortized cost	$ 0	$ 0
Extended Maturity [Member]
Modified, Amortized cost	10,455	18,126
Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	12,439	2,507
Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0	0
Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0	0
Construction and Other [Member]
Modified, Amortized cost		$ 3,202
Total Financing Receivables, Percentage		0.20%
Construction and Other [Member] | Payment Deferral [Member]
Modified, Amortized cost		$ 0
Construction and Other [Member] | Extended Maturity [Member]
Modified, Amortized cost		3,202
Construction and Other [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost		0
Construction and Other [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost		0
Construction and Other [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost		0
Multifamily Loan [Member]
Modified, Amortized cost	$ 695
Total Financing Receivables, Percentage	0.00%
Multifamily Loan [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0
Multifamily Loan [Member] | Extended Maturity [Member]
Modified, Amortized cost	695
Multifamily Loan [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	0
Multifamily Loan [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0
Multifamily Loan [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0
Commercial And Industrial [Member]
Modified, Amortized cost	$ 889
Total Financing Receivables, Percentage	0.10%
Commercial And Industrial [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0
Commercial And Industrial [Member] | Extended Maturity [Member]
Modified, Amortized cost	889
Commercial And Industrial [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	0
Commercial And Industrial [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0
Commercial And Industrial [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0
Home Equity Lines of Credit [Member]
Modified, Amortized cost	$ 84
Total Financing Receivables, Percentage	0.00%
Home Equity Lines of Credit [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0
Home Equity Lines of Credit [Member] | Extended Maturity [Member]
Modified, Amortized cost	84
Home Equity Lines of Credit [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	0
Home Equity Lines of Credit [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0
Home Equity Lines of Credit [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0
Commercial Portfolio Segment [Member] | Owner Occupied Loan [Member]
Modified, Amortized cost	$ 438
Total Financing Receivables, Percentage	0.00%
Commercial Portfolio Segment [Member] | Owner Occupied Loan [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0
Commercial Portfolio Segment [Member] | Owner Occupied Loan [Member] | Extended Maturity [Member]
Modified, Amortized cost	438
Commercial Portfolio Segment [Member] | Owner Occupied Loan [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	0
Commercial Portfolio Segment [Member] | Owner Occupied Loan [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0
Commercial Portfolio Segment [Member] | Owner Occupied Loan [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	0
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member]
Modified, Amortized cost	$ 20,788	$ 17,431
Total Financing Receivables, Percentage	1.30%	1.20%
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Payment Deferral [Member]
Modified, Amortized cost	$ 0	$ 0
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Extended Maturity [Member]
Modified, Amortized cost	8,349	14,924
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Payment Deferral and Extended Maturity [Member]
Modified, Amortized cost	12,439	2,507
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Interest Rate Reduction and Term Past Due [Member]
Modified, Amortized cost	0	0
Commercial Portfolio Segment [Member] | Non-owner occupied Loan [Member] | Interest Rate Reduction and Principal Forgiveness [Member]
Modified, Amortized cost	$ 0	$ 0