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Employee Benefit Plans - Fair Values of the Wesbanco's Pension Plan Assets (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Compensation Related Costs [Abstract] |  |
Net assets available for benefits | $ 166.9 | $ 204.8

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition Defined Benefit Plan Net Assets Available For Benefits. + References No definition available. + Details
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Namespace Prefix: | wsbc_
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Balance Type: | debit
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