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Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Collateral dependent loans | $ 442 | $ 4,051 | $ 7,943 | $ 4,358 |
Collateral dependent loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 3,751 |  | 3,751 |  | $ 8,770
Fair value nonrecurring basis |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 9,479
Fair value nonrecurring basis | Collateral dependent loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 3,751 |  | 3,751 |  | 8,770
Collateral dependent loans | 442 | 4,051 | 7,940 | 4,358 |
Fair value nonrecurring basis | Real estate owned |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 709
Fair value nonrecurring basis | Foreclosed assets |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Collateral dependent loans | 0 | $ 0 | 3 | $ 0 |
Fair value nonrecurring basis | Level 1 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 0
Fair value nonrecurring basis | Level 1 | Collateral dependent loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 0 |  | 0 |  | 0
Fair value nonrecurring basis | Level 1 | Real estate owned |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 0
Fair value nonrecurring basis | Level 2 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 0
Fair value nonrecurring basis | Level 2 | Collateral dependent loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 0 |  | 0 |  | 0
Fair value nonrecurring basis | Level 2 | Real estate owned |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 0
Fair value nonrecurring basis | Level 3 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | 9,479
Fair value nonrecurring basis | Level 3 | Collateral dependent loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | $ 3,751 |  | $ 3,751 |  | 8,770
Fair value nonrecurring basis | Level 3 | Real estate owned |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value |  |  |  |  | $ 709

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