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v3.23.1

Loans and Allowance for Credit Losses - Troubled Debt Restructurings Identified During Period (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) Contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract |  | 2
Total Pre-Modification Outstanding Recorded Investment |  | $ 69
Post- Modification Outstanding Recorded Investment | $ 25 | 69
Troubled Debt Restructuring [Policy Text Block] |  | $ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract |  | 1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | 0 | $ 17
Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract |  | 2
Total Pre-Modification Outstanding Recorded Investment |  | $ 69
Post- Modification Outstanding Recorded Investment | 25 | 69
Troubled Debt Restructuring [Policy Text Block] |  | $ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract |  | 1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | $ 17
Senior Lien | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract |  | 2
Total Pre-Modification Outstanding Recorded Investment |  | $ 69
Post- Modification Outstanding Recorded Investment | 25 | 69
Troubled Debt Restructuring [Policy Text Block] |  | $ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | Contract |  | 1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | $ 17
Extended Maturity [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 0
Post- Modification Outstanding Recorded Investment | 0 |
Extended Maturity [Member] | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 0
Post- Modification Outstanding Recorded Investment | 0 |
Extended Maturity [Member] | Senior Lien | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 0
Post- Modification Outstanding Recorded Investment | 0 |
Contractual Interest Rate Reduction [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 10
Post- Modification Outstanding Recorded Investment | 25 |
Contractual Interest Rate Reduction [Member] | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 10
Post- Modification Outstanding Recorded Investment | 25 |
Contractual Interest Rate Reduction [Member] | Senior Lien | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 10
Post- Modification Outstanding Recorded Investment | $ 25 |
Contractual Payment Modification [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 59
Contractual Payment Modification [Member] | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | 59
Contractual Payment Modification [Member] | Senior Lien | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment |  | $ 59

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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-34 + Details
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