<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2026"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="wsbc-20260702.xsd" xlink:type="simple"/>
    <context id="C_b7f9f222-2cde-49bf-9117-7738f2f04a38">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000203596</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:SeriesBPreferredStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-07-02</startDate>
            <endDate>2026-07-02</endDate>
        </period>
    </context>
    <context id="C_b98bc530-3637-489e-aeff-9d136e1903e5">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000203596</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-07-02</startDate>
            <endDate>2026-07-02</endDate>
        </period>
    </context>
    <context id="C_1201bd15-9355-464a-a8f8-c4bee9d99e44">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000203596</identifier>
        </entity>
        <period>
            <startDate>2026-07-02</startDate>
            <endDate>2026-07-02</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_4c5f502d-b175-4c07-bd62-1b3cfcfeee28">0000203596</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_e0680427-712b-4cc9-8293-8e8e29af13d7">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_456a06a7-70a0-4e32-a098-11405a3864cb">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_631ca086-0e66-4c48-8fe1-1d9d8841df52">2026-07-02</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_2a93428c-953d-4fc1-9114-dc858045fbf5">WESBANCO, INC.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_f91fc263-70c9-453b-866e-2c27532eb5cb">WV</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_9eee7392-04bd-4155-bbff-8b95d71c5617">001-39442</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_4a4b59d5-5ff6-496e-a129-e77e55b304fd">55-0571723</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_142e8f5e-8dd9-40d6-8650-f97338695729">1 Bank Plaza</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_b00f0ce0-8e26-4052-9e37-2fcdbc811f3d">Wheeling</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_7d8c619c-241f-4e27-a8b4-66032cefd47b">WV</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_7aef3f35-fc15-49fc-9818-84a9b5ea070f">26003</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_afc51032-4a9d-40b9-aee1-206249ccc66e">304</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_846fefc4-db08-4d61-a222-ab1dfcb4e067">234-9000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_47a4d934-f7d5-4469-aac5-25d5c0921bc8">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_92f239a4-690c-4fca-aabb-ba346abbc247">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_a3887606-c215-427b-ac44-e7a4c31d6efb">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_4d8f9e56-aad8-47ac-a894-46fbf2768cc6">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="C_b98bc530-3637-489e-aeff-9d136e1903e5"
      id="F_316b1746-d6b3-4e92-8ef3-f10fa1401e74">Common Stock $2.0833 Par Value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_b98bc530-3637-489e-aeff-9d136e1903e5"
      id="F_bf60273e-8ac4-4100-bb35-69c06c437330">WSBC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="C_b98bc530-3637-489e-aeff-9d136e1903e5"
      id="F_7c208917-70a9-413b-b64c-11d1604b2ef0">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="C_b7f9f222-2cde-49bf-9117-7738f2f04a38"
      id="F_ba707471-2d25-40e1-a379-dddeda8e8ba3">Depositary Shares (each representing 1/40th interest in a share of 7.375% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series B)</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="C_b7f9f222-2cde-49bf-9117-7738f2f04a38"
      id="F_c4322b87-5a77-4fc2-a81f-ea9b9f3149ac">WSBCO</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="C_b7f9f222-2cde-49bf-9117-7738f2f04a38"
      id="F_ea2481f9-c1b5-4ab9-8e1a-d31c002e8ce6">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="C_1201bd15-9355-464a-a8f8-c4bee9d99e44"
      id="F_2a8bb6d5-6226-4a79-8f78-3bba24d9c538">false</dei:EntityEmergingGrowthCompany>
</xbrl>
