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Fair Value Measurement - Quantitative Information about Level 3 Fair Value Measurements (Detail) - Assets Measured at Fair Value on a Nonrecurring Basis [Member] - (Level 3) [Member] $ in Thousands | 12 Months Ended |
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Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($)
Impaired Loans [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Fair Value | $ 11 |
Impaired Loans [Member] | Measurement Input, Appraised Value [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 10 |
Impaired Loans [Member] | Measurement Input, Appraised Value [Member] | Weighted Average [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 10 |
Impaired Loans [Member] | Measurement Input Holding Period [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Impaired loans, Term | 24 months |
Impaired Loans [Member] | Measurement Input Holding Period [Member] | Weighted Average [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Impaired loans, Term | 24 months |
Mortgage Servicing Rights [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Fair Value | $ 2,642 | $ 2,689
Mortgage Servicing Rights [Member] | Measurement Input, Constant Prepayment Rate [Member] | Minimum [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 8 | 5
Mortgage Servicing Rights [Member] | Measurement Input, Constant Prepayment Rate [Member] | Maximum [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 35 | 20
Mortgage Servicing Rights [Member] | Measurement Input, Constant Prepayment Rate [Member] | Weighted Average [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 15 | 7
Mortgage Servicing Rights [Member] | Measurement Input, Discount Rate [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 12 | 12
Mortgage Servicing Rights [Member] | Measurement Input, Discount Rate [Member] | Weighted Average [Member] |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |
Unobservable Input | 12 | 12

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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