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Credit Quality - Schedule of Financial Effect of Loan and Lease Modifications (Detail) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Commercial Real Estate [Member] | Owner-Occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.50% | 0.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 2 years 4 months 24 days |
Weighted Average Term Extension (in years) | 9 months 18 days | 3 months 18 days
Commercial Real Estate [Member] | Nonowner-Occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.50% | 0.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 1 year 7 months 6 days |
Weighted Average Term Extension (in years) | 4 months 24 days | 6 months
Other Commercial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.00% | 1.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 0 years |
Weighted Average Term Extension (in years) | 3 months 18 days | 3 months 18 days
Residential Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.00% | 0.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 0 years |
Weighted Average Term Extension (in years) | 0 years | 4 years 10 months 24 days
Construction & Land Development [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.00% | 0.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 0 years |
Weighted Average Term Extension (in years) | 0 years | 4 years 6 months
Consumer [Member] | Bankcard [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.00% | 0.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 0 years |
Weighted Average Term Extension (in years) | 0 years | 0 years
Consumer [Member] | Other Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Weighted-Average Interest Rate Reduction | 0.00% | 0.00%
Weighted-Average Other-Than- Insignificant Payment Delay (in years) | 0 years |
Weighted Average Term Extension (in years) | 0 years | 0 years

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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/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 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -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 4: 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 5: 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 + Details
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