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 | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Net Occupancy [Member] | ||||
| Segment Reporting [Line Items] | ||||
| Depreciation and amortization expense | $ 2.1 | $ 2.2 | $ 4.2 | $ 4.1 |
| Equipment and Software [Member] | ||||
| Segment Reporting [Line Items] | ||||
| Depreciation and amortization expense | $ 2.9 | $ 3.2 | $ 5.8 | $ 5.6 |
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|