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Summary of Significant Accounting Policies, New Accounting Standards (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jan. 27, 2023 | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2024 | Mar. 31, 2024
Tax Investments [Abstract] |  |  |  |  |
Retained earnings |  | $ 517,814 | $ 484,400 | $ 517,814 |
Accounting Standards Update 2023-02 [Member] |  |  |  |  |
Tax Investments [Abstract] |  |  |  |  |
Amortization expenses recognized |  | $ 800 |  | $ 2,400 |
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] |  | Income taxes |  | Income taxes |
Income tax credits and other tax benefits recognized |  | $ 1,100 |  | $ 3,200 |
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization, Statement of Cash Flows [Extensible Enumeration] |  | Income taxes |  | Income taxes |
Tax investments |  | $ 16,800 |  | $ 16,800 |
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] |  | Other assets |  | Other assets |
Impairment recognized resulting from the forfeiture or ineligibility of income tax credits or other circumstances |  | $ 0 |  | $ 0 |
Unfunded commitment |  | 5,000 |  | 5,000 |
Accounting Standards Update 2023-02 [Member] | Pre-Tax Income [Member] |  |  |  |  |
Tax Investments [Abstract] |  |  |  |  |
Investment income or loss |  | 0 |  |  |
Accounting Standards Update 2023-02 [Member] | Unfunded Commitments [Member] |  |  |  |  |
Unfunded Commitments [Abstract] |  |  |  |  |
2024 |  | 1,835 |  | 1,835 |
2025 |  | 2,000 |  | 2,000 |
2026 |  | 315 |  | 315 |
2027 |  | 146 |  | 146 |
2028 |  | 146 |  | 146 |
After |  | $ 508 |  | $ 508 |
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2023-02 [Member] |  |  |  |  |
Tax Investments [Abstract] |  |  |  |  |
Retained earnings |  |  |  |  | $ (2,000)
Amortization expenses recognized |  |  | $ 700 |  |
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] |  |  | Other Noninterest Expense |  |
3-Month CME Term SOFR [Member] |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |
Term of variable rate | 3 months |  |  |  |
Basis spread on variable rate | 0.26161% |  |  |  |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:SecuredOvernightFinancingRateSofrMember |  |  |  |
6-Month CME Term SOFR [Member] |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |
Term of variable rate | 6 months |  |  |  |
Basis spread on variable rate | 0.42826% |  |  |  |
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