Investment Securities - Credit quality indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
AAA/AA/A
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	$ 230,974	$ 243,583
AAA/AA/A \| Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	192,308	192,156
AAA/AA/A \| Private label residential mortgage and asset backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	38,666	51,427
AAA/AA/A \| Corporate debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0	0
BBB
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	18,373	30,218
BBB \| Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0	0
BBB \| Private label residential mortgage and asset backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0	0
BBB \| Corporate debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	18,373	30,218
Unrated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	26,767	17,629
Unrated \| Obligations of states and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	0	0
Unrated \| Private label residential mortgage and asset backed securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	12,731	1,639
Unrated \| Corporate debt securities
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Total debt securities held-to-maturity	$ 14,036	$ 15,990