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Note 6 - Goodwill and Intangibles - Estimated Amortization Expense of Core Deposit Intangible (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net book value $ 9,349 $ 11,381 $ 14,970  
Core Deposits [Member]        
2022 1,971      
2023 1,776      
2024 1,623      
2025 1,535      
2026 1,284      
Thereafter 1,160      
Net book value $ 9,349 $ 11,381 13,466 $ 15,595
Customer Lists [Member]        
Net book value     $ 1,504 $ 1,855