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Investment Securities - Non-Marketable Securities Included in Other Assets Narrative (Details) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 13, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Feb. 20, 2025 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Federal home loan bank stock, par value (in dollars per share) |  | $ 100 |  |  |
Investments in low income housing tax credit funds |  | $ 1,600,000 | $ 2,000,000.0 |  |
Low income housing tax credits and other tax benefits |  | 525,000 |  |  |
Low income housing amortization expense |  | 438,000 |  |  |
Unfunded commitments for low income housing tax credit funds |  | 338,000 |  |  |
Impairment losses |  | $ 0 | $ 0 |  |
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] |  |  | Payment for Acquisition, Real Estate, Held-for-Investment |  |
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Payment for Acquisition, Real Estate, Held-for-Investment |  |  |
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] |  | Payment for Acquisition, Real Estate, Held-for-Investment |  |  |
Subsequent event |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Federal home loan bank, dividend rate percentage |  |  |  | 8.75% |
Visa Inc. Class B common stock |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity securities, FV-NI gain | $ 2,800,000 |  |  |  |
Visa Inc. Class B common stock |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of shares of securities carried at cost (in shares) |  |  |  |  | 10,439
Carrying value of securities carried at cost |  | $ 0 |  |  |
Other assets |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Federal home loan bank stock |  | $ 16,700,000 | $ 16,700,000 |  |

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- Definition Amount of investment that generates income tax credit and other income tax benefit under tax credit program elected to be accounted for using proportional amortization method. Includes, but is not limited to, investment under program not meeting condition for accounting under proportional amortization method. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478156/740-323-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 323 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478156/740-323-50-1A + Details
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