Fair Value Measurements (Details 2) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair value measurements
Investment securities available-for-sale	$ 1,495,117	$ 1,536,299
Assets:
Mortgages held for sale	7,110	2,569
U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	699,857	757,749
U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	105,680	82,632
Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	689,078	695,918
Corporate debt securities
Fair value measurements
Investment securities available-for-sale	502
Total
Fair value measurements
Investment securities available-for-sale	1,495,117	1,536,299
Assets:
Mortgages held for sale	7,110	2,569
Level 1
Fair value measurements
Investment securities available-for-sale	406,996	446,021
Assets:
Mortgages held for sale	0	0
Level 2
Fair value measurements
Investment securities available-for-sale	1,087,145	1,089,246
Assets:
Mortgages held for sale	7,110	2,569
Level 3
Fair value measurements
Investment securities available-for-sale	976	1,032
Assets:
Mortgages held for sale	0	0
Recurring basis \| Total
Fair value measurements
Investment securities available-for-sale	1,495,117	1,536,299
Assets:
Mortgages held for sale	7,110	2,569
Accrued income and other assets	18,141	16,424
Total	1,520,368	1,555,292
Liabilities:
Accrued expenses and other liabilities	18,478	16,727
Total	18,478	16,727
Recurring basis \| Total \| U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	699,857	757,749
Recurring basis \| Total \| U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	105,680	82,632
Recurring basis \| Total \| Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	689,078	695,918
Recurring basis \| Total \| Corporate debt securities
Fair value measurements
Investment securities available-for-sale	502
Recurring basis \| Level 1
Fair value measurements
Investment securities available-for-sale	406,996	446,021
Assets:
Mortgages held for sale	0	0
Accrued income and other assets	0	0
Total	406,996	446,021
Liabilities:
Accrued expenses and other liabilities	0	0
Total	0	0
Recurring basis \| Level 1 \| U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	406,996	446,021
Recurring basis \| Level 1 \| U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	0	0
Recurring basis \| Level 1 \| Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	0	0
Recurring basis \| Level 1 \| Corporate debt securities
Fair value measurements
Investment securities available-for-sale	0
Recurring basis \| Level 2
Fair value measurements
Investment securities available-for-sale	1,087,145	1,089,246
Assets:
Mortgages held for sale	7,110	2,569
Accrued income and other assets	18,141	16,424
Total	1,112,396	1,108,239
Liabilities:
Accrued expenses and other liabilities	18,478	16,727
Total	18,478	16,727
Recurring basis \| Level 2 \| U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	292,861	311,728
Recurring basis \| Level 2 \| U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	104,704	81,600
Recurring basis \| Level 2 \| Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	689,078	695,918
Recurring basis \| Level 2 \| Corporate debt securities
Fair value measurements
Investment securities available-for-sale	502
Recurring basis \| Level 3
Fair value measurements
Investment securities available-for-sale	976	1,032
Assets:
Mortgages held for sale	0	0
Accrued income and other assets	0	0
Total	976	1,032
Liabilities:
Accrued expenses and other liabilities	0	0
Total	0	0
Recurring basis \| Level 3 \| U.S. Treasury and Federal agencies securities
Fair value measurements
Investment securities available-for-sale	0	0
Recurring basis \| Level 3 \| U.S. States and political subdivisions securities
Fair value measurements
Investment securities available-for-sale	976	1,032
Recurring basis \| Level 3 \| Mortgage-backed securities - Federal agencies
Fair value measurements
Investment securities available-for-sale	0	$ 0
Recurring basis \| Level 3 \| Corporate debt securities
Fair value measurements
Investment securities available-for-sale	$ 0

Fair value portion of asset recognized for present right to economic benefit.

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