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Fair Value Information - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value on Non-Recurring Basis [Member] - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Description of assets |  |
Total assets | $ 34 |
Loans, Excluding PCI Loans [Member] |  |
Description of assets |  |
Total assets |  | $ 2,585
Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member] |  |
Description of assets |  |
Total assets | 8 | 11
Loans, Excluding PCI Loans [Member] | Construction [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Loans, Excluding PCI Loans [Member] | SBA |  |
Description of assets |  |
Total assets | 19 | 49
Loans, Excluding PCI Loans [Member] | SBA - PPP [Member] |  |
Description of assets |  |
Total assets |  | 0
Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] |  |
Description of assets |  |
Total assets | 6 | 220
Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] |  |
Description of assets |  |
Total assets | 1 | 9
Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member] |  |
Description of assets |  |
Total assets | 0 | 2,296
Level 1 [Member] |  |
Description of assets |  |
Total assets | 0 |
Level 1 [Member] | Loans, Excluding PCI Loans [Member] |  |
Description of assets |  |
Total assets |  | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | SBA |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | SBA - PPP [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 1 [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] |  |
Description of assets |  |
Total assets | 0 |
Level 2 [Member] | Loans, Excluding PCI Loans [Member] |  |
Description of assets |  |
Total assets |  | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | SBA |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | SBA - PPP [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 2 [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 3 [Member] |  |
Description of assets |  |
Total assets | 38,135 |
Level 3 [Member] | Loans, Excluding PCI Loans [Member] |  |
Description of assets |  |
Total assets |  | 44,693
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member] |  |
Description of assets |  |
Total assets | 32,575 | 28,728
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | SBA |  |
Description of assets |  |
Total assets | 1,079 | 1,532
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | SBA - PPP [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] |  |
Description of assets |  |
Total assets | 2,901 | 3,144
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] |  |
Description of assets |  |
Total assets | 1,085 | 860
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Level 3 [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member] |  |
Description of assets |  |
Total assets | 495 | 10,429
Carrying Value [Member] |  |
Description of assets |  |
Total assets | 38,135 |
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] |  |
Description of assets |  |
Total assets |  | 44,693
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial Real Estate [Member] |  |
Description of assets |  |
Total assets | 32,575 | 28,728
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Construction [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | SBA |  |
Description of assets |  |
Total assets | 1,079 | 1,532
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | SBA - PPP [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Commercial and Industrial [Member] |  |
Description of assets |  |
Total assets | 2,901 | 3,144
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Dairy & Livestock and Agribusiness [Member] |  |
Description of assets |  |
Total assets | 1,085 | 860
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Municipal Lease Finance Receivables [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | SFR Mortgage [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Consumer and Other Loans [Member] |  |
Description of assets |  |
Total assets | 0 | 0
Carrying Value [Member] | Loans, Excluding PCI Loans [Member] | Other Real Estate Owned [Member] |  |
Description of assets |  |
Total assets | $ 495 | $ 10,429

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