Note 9 - Derivatives and Hedging Activities (Details Textual) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Noninterest Income, Total	$ 7,253,000	$ 15,568,000	$ 24,272,000	$ 43,587,000
Noninterest Expense, Total	26,756,000	$ 26,210,000	79,440,000	$ 77,519,000
Interest Rate Swap [Member]
Noninterest Income, Total			200,000
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral, Total	28,500,000		28,500,000		$ 4,900,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	28,000,000.0		28,000,000.0		3,600,000
Derivative, Notional Amount	$ 359,936,000		$ 359,936,000		279,419,000
Noninterest Expense, Total					$ 200,000