Note 9 - Derivatives and Hedging Activities (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Noninterest Expense	$ 27,829,000	$ 26,942,000	$ 56,429,000	$ 52,684,000
Noninterest Income, Total	7,645,000	$ 7,741,000	14,597,000	$ 17,018,000
Interest Rate Swap [Member]
Noninterest Expense			100,000
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral	27,200,000		27,200,000		$ 25,900,000
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	25,800,000		25,800,000		25,300,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	27,000,000.0		27,000,000.0		25,200,000
Derivative Asset, Subject to Master Netting Arrangement, before Offset	1,200,000		1,200,000		100,000
Derivative Liability, Subject to Master Netting Arrangement, after Offset	1,400,000		1,400,000		400,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	1,200,000		1,200,000		400,000
Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction	200,000		200,000		0
Derivative, Notional Amount	$ 548,000,000		$ 548,000,000		402,000,000
Noninterest Income, Total					$ 100,000