Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Available-for-sale securities:
Total available-for-sale securities	$ 1,090,235	$ 1,063,292
Equity securities, at fair value	4,518	4,439
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	152,759	191,358
Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	272,508	267,740
Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	629,806	539,742
Other Securities
Available-for-sale securities:
Total available-for-sale securities	35,162	64,452
Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	1,090,235	1,063,292
Equity securities, at fair value	4,518	4,439
Loans held for sale, fair value	5,543	6,614
Derivative assets: interest rate swaps	1,879	2,949
Total assets	1,102,175	1,077,294
Derivative liabilities: interest rate swaps	1,394	2,006
Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	152,759	191,358
Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	272,508	267,740
Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	629,806	539,742
Fair Value, Recurring \| Other Securities
Available-for-sale securities:
Total available-for-sale securities	35,162	64,452
Quoted Prices in Active Markets for Identical Assets (Level 1)
Available-for-sale securities:
Total available-for-sale securities	0	0
Equity securities, at fair value	4,518	4,439
Loans held for sale, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	0	0
Equity securities, at fair value	4,518	4,439
Loans held for sale, fair value	0	0
Derivative assets: interest rate swaps	0	0
Total assets	4,518	4,439
Derivative liabilities: interest rate swaps	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring \| Other Securities
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Other Observable Inputs (Level 2)
Available-for-sale securities:
Total available-for-sale securities	1,087,476	1,057,533
Equity securities, at fair value	0	0
Loans held for sale, fair value	5,543	6,614
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	1,087,476	1,057,533
Equity securities, at fair value	0	0
Loans held for sale, fair value	5,543	6,614
Derivative assets: interest rate swaps	1,879	2,949
Total assets	1,094,898	1,067,096
Derivative liabilities: interest rate swaps	1,394	2,006
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	152,759	191,358
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	272,508	267,740
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	629,806	539,742
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring \| Other Securities
Available-for-sale securities:
Total available-for-sale securities	32,403	58,693
Significant Unobservable Inputs (Level 3)
Available-for-sale securities:
Total available-for-sale securities	2,759	5,759
Equity securities, at fair value	0	0
Loans held for sale, fair value	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring
Available-for-sale securities:
Total available-for-sale securities	2,759	5,759
Equity securities, at fair value	0	0
Loans held for sale, fair value	0	0
Derivative assets: interest rate swaps	0	0
Total assets	2,759	5,759
Derivative liabilities: interest rate swaps	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Obligations of States and Political Subdivisions
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Mortgage-backed Securities
Available-for-sale securities:
Total available-for-sale securities	0	0
Significant Unobservable Inputs (Level 3) \| Fair Value, Recurring \| Other Securities
Available-for-sale securities:
Total available-for-sale securities	$ 2,759	$ 5,759

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

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