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Note 3 - Securities - Schedule of Expected Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Available for sale securities, amortized cost, within one year	$ 3,704
Available for sale securities, within one year	3,693
Available for sale securities, amortized cost, one to five years	52,132
Available for sale securities, one to five years	48,284
Available for sale securities, amortized cost, five to ten years	166,010
Available for sale securities, five to ten years	153,720
Available for sale securities, amortized cost, beyond ten years	490,310
Available for sale securities, beyond ten years	401,520
Available for sale securities, amortized cost, mortgage-backed, collateralized mortgage obligations and Small Business Administration securities	785,247
Available for sale securities, mortgage-backed, collateralized mortgage obligations and Small Business Administration securities	694,549
Available for sale securities, amortized cost	1,497,403	$ 1,510,681
Available for sale securities	$ 1,301,766	$ 1,266,553

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