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Fair Value - Summary of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | $ 307,427 | $ 321,081 | [1]
Total securities available for sale | 307,427 | 321,081 |
U.S. Treasury and Agencies [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 68,895 | 68,871 |
State and Municipal [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 43,003 | 43,325 |
Corporate Bonds [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 32,416 | 31,915 |
Level 2 [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 306,677 | 320,331 |
Level 3 [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 750 | 750 |
Fair Value, Recurring [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Total securities available for sale | 307,427 | 321,081 |
Mortgage servicing rights assets | 29,862 | 27,114 |
Rabbi trust assets | 575 | 531 |
Mortgage derivative asset | 295 | 335 |
Interest rate swap asset | 103 | 71 |
Mortgage derivative liability |  | 140 |
Interest rate swap liability | 103 | 71 |
Fair Value, Recurring [Member] | Mortgage Backed Securities [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 163,113 | 176,970 |
Fair Value, Recurring [Member] | U.S. Treasury and Agencies [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 68,895 | 68,871 |
Fair Value, Recurring [Member] | State and Municipal [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 43,003 | 43,325 |
Fair Value, Recurring [Member] | Corporate Bonds [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 32,416 | 31,915 |
Fair Value, Recurring [Member] | Level 1 [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Rabbi trust assets | 575 | 531 |
Fair Value, Recurring [Member] | Level 2 [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Total securities available for sale | 306,677 | 320,331 |
Mortgage derivative asset | 295 | 335 |
Interest rate swap asset | 103 | 71 |
Mortgage derivative liability |  | 140 |
Interest rate swap liability | 103 | 71 |
Fair Value, Recurring [Member] | Level 2 [Member] | Mortgage Backed Securities [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 163,113 | 176,970 |
Fair Value, Recurring [Member] | Level 2 [Member] | U.S. Treasury and Agencies [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 68,895 | 68,871 |
Fair Value, Recurring [Member] | Level 2 [Member] | State and Municipal [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 43,003 | 43,325 |
Fair Value, Recurring [Member] | Level 2 [Member] | Corporate Bonds [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | 31,666 | 31,165 |
Fair Value, Recurring [Member] | Level 3 [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Total securities available for sale | 750 | 750 |
Mortgage servicing rights assets | 29,862 | 27,114 |
Fair Value, Recurring [Member] | Level 3 [Member] | Corporate Bonds [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Securities available for sale | $ 750 | $ 750 |
[1] | Derived from audited December 31, 2023 Consolidated Financial Statements.

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