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Fair Value Measurement - Quantitative Information about Recurring Fair Value Measurements (Detail) - Mortgage servicing rights $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
--- | --- | --- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 6,712 | $ 5,874 | $ 5,092 | $ 6,200
Minimum | Constant prepayment rate |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Constant prepayment rate | 1.16 | 1.87 |  |
Minimum | Discount rate |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Constant prepayment rate | 0.10 | 0.10 |  |
Maximum | Constant prepayment rate |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Constant prepayment rate | 2.26 | 2.64 |  |
Maximum | Discount rate |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Constant prepayment rate | 0.14 | 0.14 |  |
Weighted Average | Constant prepayment rate |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Constant prepayment rate | 1.27 | 2.08 |  |
Weighted Average | Discount rate |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Constant prepayment rate | 0.12 | 0.12 |  |

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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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