Business Segments - Schedule of Financial Information to Wesbanco's Business Segment (Parenthetical) (Detail) - Community Banking [Member] - Operating Segments [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Net Occupancy [Member] | ||||
| Segment Reporting [Line Items] | ||||
| Depreciation and amortization expense | $ 2.2 | $ 2.2 | $ 6.4 | $ 6.3 |
| Equipment and Software [Member] | ||||
| Segment Reporting [Line Items] | ||||
| Depreciation and amortization expense | $ 2.9 | $ 3.0 | $ 8.7 | $ 8.6 |
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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