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Note 2 - Securities - Investments in an Unrealized Loss Position That Were Temporarily Impaired (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Less than 12 months, fair value, available for sale securities $ 61,012 $ 174,217
Less than 12 months, unrealized (loss), available for sale securities (5,458) (2,085)
12 months or more, fair value, available for sale securities 90,892 15,758
12 months or more, unrealized (loss), available for sale securities (18,560) (511)
Total, fair value, available for sale securities 151,904 189,975
Total, unrealized (loss), available for sale securities (24,018) (2,596)
Less than 12 months, fair value, held to maturity securities 88,617 6,410
Less than 12 months, fair value, held to maturity securities (8,466) (66)
12 months or more, fair value, held to maturity securities 53,181 0
12 months or more, unrealized (loss), available for sale securities (2,895) 0
Total, fair value, held to maturity securities 141,798 6,410
Total, unrealized (loss), held to maturity securities (11,361) (66)
Less than 12 months, fair value 149,629 180,627
Less than 12 months, fair value, (13,924) (2,151)
12 months or more, fair value 144,073 15,758
12 months or more, unrealized (loss) (21,455) (511)
Total, fair value 293,702 196,385
Total, unrealized (loss) (35,379) (2,662)
US Treasury Securities [Member]    
Less than 12 months, fair value, available for sale securities 9,041 29,656
Less than 12 months, unrealized (loss), available for sale securities (932) (250)
12 months or more, fair value, available for sale securities 2,188 0
12 months or more, unrealized (loss), available for sale securities (307) 0
Total, fair value, available for sale securities 11,229 29,656
Total, unrealized (loss), available for sale securities (1,239) (250)
Less than 12 months, fair value, held to maturity securities 19,302  
Less than 12 months, fair value, held to maturity securities (258)  
12 months or more, fair value, held to maturity securities 18,342  
12 months or more, unrealized (loss), available for sale securities (310)  
Total, fair value, held to maturity securities 37,644  
Total, unrealized (loss), held to maturity securities (568)  
US Agency and Mortgage-backed Securities [Member]    
Less than 12 months, fair value, available for sale securities 27,282 109,950
Less than 12 months, unrealized (loss), available for sale securities (1,945) (1,335)
12 months or more, fair value, available for sale securities 62,342 14,749
12 months or more, unrealized (loss), available for sale securities (11,204) (502)
Total, fair value, available for sale securities 89,624 124,699
Total, unrealized (loss), available for sale securities (13,149) (1,837)
Less than 12 months, fair value, held to maturity securities 58,019 5,411
Less than 12 months, fair value, held to maturity securities (6,848) (53)
12 months or more, fair value, held to maturity securities 32,167 0
12 months or more, unrealized (loss), available for sale securities (2,341) 0
Total, fair value, held to maturity securities 90,186 5,411
Total, unrealized (loss), held to maturity securities (9,189) (53)
US States and Political Subdivisions Debt Securities [Member]    
Less than 12 months, fair value, available for sale securities 24,689 34,611
Less than 12 months, unrealized (loss), available for sale securities (2,581) (500)
12 months or more, fair value, available for sale securities 26,362 1,009
12 months or more, unrealized (loss), available for sale securities (7,049) (9)
Total, fair value, available for sale securities 51,051 35,620
Total, unrealized (loss), available for sale securities (9,630) (509)
Less than 12 months, fair value, held to maturity securities 8,648 999
Less than 12 months, fair value, held to maturity securities (1,008) (13)
12 months or more, fair value, held to maturity securities 2,672 0
12 months or more, unrealized (loss), available for sale securities (244) 0
Total, fair value, held to maturity securities 11,320 999
Total, unrealized (loss), held to maturity securities (1,252) $ (13)
Corporate Debt Securities [Member]    
Less than 12 months, fair value, held to maturity securities 2,648  
Less than 12 months, fair value, held to maturity securities (352)  
12 months or more, fair value, held to maturity securities 0  
12 months or more, unrealized (loss), available for sale securities 0  
Total, fair value, held to maturity securities 2,648  
Total, unrealized (loss), held to maturity securities $ (352)