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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, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Losses from Fair Value Adjustments Assets and Liabilities | $ 4,708 | $ (1,554) | $ (2,514) | $ (2,071) |
Individually evaluated loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 5,619 |  | 5,619 |  | $ 5,719
Fair Value Nonrecurring Basis |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 5,794 |  | 5,794 |  | 6,030
Fair Value Nonrecurring Basis | Individually evaluated loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 5,619 |  | 5,619 |  | 5,719
Losses from Fair Value Adjustments Assets and Liabilities | 4,749 |  | (2,281) |  |
Fair Value Nonrecurring Basis | Foreclosed assets |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 175 |  | 175 |  | 311
Losses from Fair Value Adjustments Assets and Liabilities | (41) |  | (233) |  |
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 |  | 0 |  | 0
Fair Value Nonrecurring Basis | Level 1 | Individually evaluated loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 0 |  | 0 |  | 0
Losses from Fair Value Adjustments Assets and Liabilities |  | (1,567) |  | (2,182) |
Fair Value Nonrecurring Basis | Level 1 | Foreclosed assets |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 0 |  | 0 |  | 0
Losses from Fair Value Adjustments Assets and Liabilities |  | $ 13 |  | $ 111 |
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 |  | 0 |  | 0
Fair Value Nonrecurring Basis | Level 2 | Individually evaluated 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 | Foreclosed assets |  |  |  |  |
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 3 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 5,794 |  | 5,794 |  | 6,030
Fair Value Nonrecurring Basis | Level 3 | Individually evaluated loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | 5,619 |  | 5,619 |  | 5,719
Fair Value Nonrecurring Basis | Level 3 | Foreclosed assets |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Total assets measured at fair value | $ 175 |  | $ 175 |  | $ 311

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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