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Note 9 - Derivatives and Hedging Activities (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Noninterest Income, Total $ 7,741,000 $ 14,556,000 $ 17,018,000 $ 28,019,000  
Noninterest Expense, Total 26,942,000 $ 26,192,000 52,684,000 $ 51,309,000  
Interest Rate Swap [Member]          
Noninterest Income, Total     100,000    
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral, Total 17,200,000   17,200,000   $ 4,900,000
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset 18,000,000.0   18,000,000.0    
Derivative, Notional Amount $ 340,692,000   $ 340,692,000   279,419,000
Noninterest Expense, Total         200,000
Derivative, Collateral, Right to Reclaim Cash         $ 3,600,000