{
 "instance": {
  "wsbc-10q_20190930.htm": {
   "axisCustom": 0,
   "axisStandard": 23,
   "contextCount": 482,
   "dts": {
    "calculationLink": {
     "local": [
      "wsbc-20190930_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "wsbc-20190930_def.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-eedm-def-2019-01-31.xml",
      "http://xbrl.fasb.org/srt/2019/elts/srt-eedm1-def-2019-01-31.xml"
     ]
    },
    "inline": {
     "local": [
      "wsbc-10q_20190930.htm"
     ]
    },
    "labelLink": {
     "local": [
      "wsbc-20190930_lab.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-doc-2019-01-31.xml",
      "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "wsbc-20190930_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-ref-2019-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "wsbc-20190930.xsd"
     ],
     "remote": [
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "https://xbrl.sec.gov/currency/2019/currency-2019-01-31.xsd",
      "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd",
      "https://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd",
      "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "https://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd",
      "https://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd",
      "http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd",
      "http://xbrl.fasb.org/srt/2019/elts/srt-roles-2019-01-31.xsd",
      "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2019/elts/us-parts-codification-2019-01-31.xsd",
      "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd"
     ]
    }
   },
   "elementCount": 641,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2019-01-31": 5,
    "http://www.wesbanco.com/20190930": 4,
    "http://xbrl.sec.gov/dei/2019-01-31": 10,
    "total": 19
   },
   "keyCustom": 79,
   "keyStandard": 405,
   "memberCustom": 35,
   "memberStandard": 50,
   "nsprefix": "wsbc",
   "nsuri": "http://www.wesbanco.com/20190930",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "100000 - Document - Document and Entity Information",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation",
     "shortName": "Document and Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100090 - Disclosure - Earnings Per Common Share",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShare",
     "shortName": "Earnings Per Common Share",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EarningsPerShareTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100100 - Disclosure - Securities",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecurities",
     "shortName": "Securities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100110 - Disclosure - Loans and the Allowance for Credit Losses",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLosses",
     "shortName": "Loans and the Allowance for Credit Losses",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100120 - Disclosure - Leases",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeases",
     "shortName": "Leases",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LesseeOperatingLeasesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100130 - Disclosure - Derivatives and Hedging Activities",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivities",
     "shortName": "Derivatives and Hedging Activities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100140 - Disclosure - Benefit Plans",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlans",
     "shortName": "Benefit Plans",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementInputsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100150 - Disclosure - Fair Value Measurement",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurement",
     "shortName": "Fair Value Measurement",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementInputsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:RevenueRecognitionDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100160 - Disclosure - Revenue Recognition",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognition",
     "shortName": "Revenue Recognition",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:RevenueRecognitionDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ComprehensiveIncomeNoteTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100170 - Disclosure - Comprehensive Income/(Loss)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLoss",
     "shortName": "Comprehensive Income/(Loss)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ComprehensiveIncomeNoteTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100180 - Disclosure - Commitments and Contingent Liabilities",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilities",
     "shortName": "Commitments and Contingent Liabilities",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100010 - Statement - Consolidated Balance Sheets",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets",
     "shortName": "Consolidated Balance Sheets",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:MarketableSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100190 - Disclosure - Business Segments",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegments",
     "shortName": "Business Segments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100200 - Disclosure - Summary of Significant Accounting Policies (Policies)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies",
     "shortName": "Summary of Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:SignificantAccountingPoliciesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BasisOfAccountingPolicyPolicyTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationSegmentAllocationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100210 - Disclosure - Mergers and Acquisitions (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables",
     "shortName": "Mergers and Acquisitions (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationSegmentAllocationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100220 - Disclosure - Earnings Per Common Share (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareTables",
     "shortName": "Earnings Per Common Share (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MarketableSecuritiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100230 - Disclosure - Securities (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesTables",
     "shortName": "Securities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MarketableSecuritiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100240 - Disclosure - Loans and the Allowance for Credit Losses (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables",
     "shortName": "Loans and the Allowance for Credit Losses (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100250 - Disclosure - Leases (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesTables",
     "shortName": "Leases (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100260 - Disclosure - Derivatives and Hedging Activities (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesTables",
     "shortName": "Derivatives and Hedging Activities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:ScheduleOfDefinedBenefitPlanDisclosureTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100270 - Disclosure - Benefit Plans (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansTables",
     "shortName": "Benefit Plans (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:ScheduleOfDefinedBenefitPlanDisclosureTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100280 - Disclosure - Fair Value Measurement (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementTables",
     "shortName": "Fair Value Measurement (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestBearingDepositsInBanks",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100020 - Statement - Consolidated Balance Sheets (Parenthetical)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical",
     "shortName": "Consolidated Balance Sheets (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestBearingDepositsInBanks",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:SummaryOfRevenueRecognitionByTypeAndPointOfRecognitionTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100290 - Disclosure - Revenue Recognition (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionTables",
     "shortName": "Revenue Recognition (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:SummaryOfRevenueRecognitionByTypeAndPointOfRecognitionTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100300 - Disclosure - Comprehensive Income/(Loss) (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossTables",
     "shortName": "Comprehensive Income/(Loss) (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:CommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100310 - Disclosure - Commitments and Contingent Liabilities (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesTables",
     "shortName": "Commitments and Contingent Liabilities (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:CommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100320 - Disclosure - Business Segments (Tables)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsTables",
     "shortName": "Business Segments (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:RegulatoryCapitalImpactPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100330 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail",
     "shortName": "Summary of Significant Accounting Policies - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:RegulatoryCapitalImpactPeriod",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100340 - Disclosure - Mergers and Acquisitions - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
     "shortName": "Mergers and Acquisitions - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20180820",
      "decimals": "-8",
      "lang": null,
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:BusinessCombinationSegmentAllocationTableTextBlock",
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20180820_20180820",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100350 - Disclosure - Mergers and Acquisitions - Summary of Final Purchase Price of Acquisition and Resulting Goodwill (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail",
     "shortName": "Mergers and Acquisitions - Summary of Final Purchase Price of Acquisition and Resulting Goodwill (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:BusinessCombinationSegmentAllocationTableTextBlock",
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20180820_20180820",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:BusinessCombinationSegmentAllocationTableTextBlock",
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20180820",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100360 - Disclosure - Mergers and Acquisitions - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
     "shortName": "Mergers and Acquisitions - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock",
       "us-gaap:BusinessCombinationDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapBusinessAcquisitionAxis_wsbcFarmersCapitalBankCorporationMember_20180820",
      "decimals": "-3",
      "lang": null,
      "name": "wsbc:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsAndGoodwill",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:NetIncomeLoss",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100370 - Disclosure - Earnings Per Common Share - Summary of Earnings Per Common Share (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
     "shortName": "Earnings Per Common Share - Summary of Earnings Per Common Share (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:IncrementalCommonSharesAttributableToCallOptionsAndWarrants",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlishares",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "0",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlishares",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100380 - Disclosure - Earnings Per Common Share - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail",
     "shortName": "Earnings Per Common Share - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:EarningsPerShareTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "0",
      "first": true,
      "lang": null,
      "name": "us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlishares",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestAndFeeIncomeLoansAndLeases",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100030 - Statement - Consolidated Statements of Comprehensive Income",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome",
     "shortName": "Consolidated Statements of Comprehensive Income",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestAndFeeIncomeLoansAndLeases",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:MarketableSecuritiesTextBlock",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100390 - Disclosure - Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
     "shortName": "Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:MarketableSecuritiesTextBlock",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "wsbc:MaximumPercentageOfEquityOfOneIssuer",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlipure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100400 - Disclosure - Securities - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail",
     "shortName": "Securities - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "wsbc:MaximumPercentageOfEquityOfOneIssuer",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlipure",
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100410 - Disclosure - Securities - Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail",
     "shortName": "Securities - Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtAndEquitySecuritiesGainLoss",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100420 - Disclosure - Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities as well as Result of the Adoption of the ASU 2016-01 (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail",
     "shortName": "Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities as well as Result of the Adoption of the ASU 2016-01 (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfRealizedGainLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapFinancialInstrumentAxis_us-gaapDebtSecuritiesMember_20190701_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:AvailableForSaleSecuritiesGrossRealizedGains",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "wsbc:SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100430 - Disclosure - Securities - Schedule of Unrealized Losses on Investment Securities (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail",
     "shortName": "Securities - Schedule of Unrealized Losses on Investment Securities (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "wsbc:SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20181231",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableDeferredIncome",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100440 - Disclosure - Loans and the Allowance for Credit Losses - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableDeferredIncome",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100450 - Disclosure - Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20181231",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableAllowance",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100460 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20171231",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableAllowance",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100470 - Disclosure - Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "wsbc:ThresholdForIndividuallyEvaluatingCommercialLoansForImpairment",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100480 - Disclosure - Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansParentheticalDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "-6",
      "first": true,
      "lang": null,
      "name": "wsbc:ThresholdForIndividuallyEvaluatingCommercialLoansForImpairment",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20171231",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100040 - Statement - Consolidated Statements of Changes in Shareholders' Equity",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity",
     "shortName": "Consolidated Statements of Changes in Shareholders' Equity",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapStatementEquityComponentsAxis_us-gaapCommonStockMember_20171231",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableNetReportedAmount",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100490 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapInternalCreditAssessmentAxis_us-gaapPassMember_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:LoansAndLeasesReceivableNetReportedAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20181231",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100500 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20181231",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableRecordedInvestmentCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100510 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableRecordedInvestmentCurrent",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:LoansPastDueAndAccruingInterestExcludingTDRS",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100520 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesParentheticalDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "wsbc:LoansPastDueAndAccruingInterestExcludingTDRS",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100530 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Impaired Loans (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Impaired Loans (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20181231",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100540 - Disclosure - Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "wsbc:NonaccrualLoansOutstandingGreaterThanOneMillionDollarsPerBorrowerNumberOfBorrowers",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcBorrower",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100550 - Disclosure - Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Parenthetical) (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsParentheticalDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans and TDRs (Parenthetical) (Detail)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "wsbc:NonaccrualLoansOutstandingGreaterThanOneMillionDollarsPerBorrowerNumberOfBorrowers",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcBorrower",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableModificationsNumberOfContracts2",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcContract",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100560 - Disclosure - Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableModificationsNumberOfContracts2",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcContract",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcDefault",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100570 - Disclosure - Loans and the Allowance for Credit Losses - TDRs Defaulted Later Restructured (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail",
     "shortName": "Loans and the Allowance for Credit Losses - TDRs Defaulted Later Restructured (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcDefault",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:RealEstateAcquiredThroughForeclosure",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100580 - Disclosure - Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail",
     "shortName": "Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:OtherForeclosedAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "us-gaap:CommonStockDividendsPerShareDeclared",
      "reportCount": 1,
      "unitRef": "U_iso4217USD_xbrlishares",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100050 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical",
     "shortName": "Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": null
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingLeaseWeightedAverageRemainingLeaseTerm1",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100590 - Disclosure - Leases - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
     "shortName": "Leases - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:OperatingLeaseExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100600 - Disclosure - Leases - Future Minimum Lease Payments Under Non-cancellable Leases (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail",
     "shortName": "Leases - Future Minimum Lease Payments Under Non-cancellable Leases (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock",
       "us-gaap:LesseeOperatingLeasesTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100620 - Disclosure - Derivatives and Hedging Activities - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail",
     "shortName": "Derivatives and Hedging Activities - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapDerivativeInstrumentRiskAxis_us-gaapInterestRateSwapMember_20181231",
      "decimals": "INF",
      "lang": null,
      "name": "us-gaap:NumberOfInterestRateDerivativesHeld",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcDerivative",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100630 - Disclosure - Derivatives and Hedging Activities - Summary of Fair Values of Derivative Instruments on Balance Sheets (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail",
     "shortName": "Derivatives and Hedging Activities - Summary of Fair Values of Derivative Instruments on Balance Sheets (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DerivativeAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DerivativeGainLossOnDerivativeNet",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100640 - Disclosure - Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
     "shortName": "Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapFinancialInstrumentAxis_us-gaapInterestRateSwapMember_us-gaapIncomeStatementLocationAxis_us-gaapOtherIncomeMember_20190701_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DerivativeGainLossOnDerivativeNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "wsbc:ScheduleOfDefinedBenefitPlanDisclosureTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanServiceCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100650 - Disclosure - Benefit Plans - Defined Benefit Pension Plan (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail",
     "shortName": "Benefit Plans - Defined Benefit Pension Plan (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "wsbc:ScheduleOfDefinedBenefitPlanDisclosureTableTextBlock",
       "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanServiceCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100660 - Disclosure - Benefit Plans - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansAdditionalInformationDetail",
     "shortName": "Benefit Plans - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-5",
      "first": true,
      "lang": null,
      "name": "us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:EquitySecuritiesFvNi",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100670 - Disclosure - Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
     "shortName": "Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsRecurringMember_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:EquitySecuritiesFvNi",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R68": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "wsbc:FairValueTransfersBetweenLevel",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100680 - Disclosure - Fair Value Measurement - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementAdditionalInformationDetail",
     "shortName": "Fair Value Measurement - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "wsbc:FairValueTransfersBetweenLevel",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R69": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:OtherRealEstateAndForeclosedAssets",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100690 - Disclosure - Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
     "shortName": "Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:NetCashProvidedByUsedInOperatingActivities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "100060 - Statement - Consolidated Statements of Cash Flows",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
     "shortName": "Consolidated Statements of Cash Flows",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:NetCashProvidedByUsedInOperatingActivities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R70": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100700 - Disclosure - Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
     "shortName": "Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel1Member_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R71": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:BrokerageCommissionsRevenue",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100710 - Disclosure - Revenue Recognition - Summary of Revenue Recognition (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
     "shortName": "Revenue Recognition - Summary of Revenue Recognition (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "wsbc:SummaryOfRevenueRecognitionByTypeAndPointOfRecognitionTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapFinancialInstrumentAxis_us-gaapDepositsMember_20190701_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R72": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190630",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100720 - Disclosure - Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
     "shortName": "Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapStatementEquityComponentsAxis_us-gaapAccumulatedDefinedBenefitPlansAdjustmentMember_20181231",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:StockholdersEquity",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R73": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "wsbc:IncomeTaxExpenseBenefitCombinedFederalAndStateIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlipure",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100730 - Disclosure - Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail) (Parenthetical) (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetailParentheticalDetail",
     "shortName": "Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Detail) (Parenthetical) (Detail)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock",
       "us-gaap:ComprehensiveIncomeNoteTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "2",
      "first": true,
      "lang": null,
      "name": "wsbc:IncomeTaxExpenseBenefitCombinedFederalAndStateIncomeTaxRate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_xbrlipure",
      "xsiNil": "false"
     }
    },
    "R74": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:DebtAndEquitySecuritiesGainLoss",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100740 - Disclosure - Comprehensive Income/(Loss) - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
     "shortName": "Comprehensive Income/(Loss) - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss) (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_us-gaapReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_us-gaapStatementEquityComponentsAxis_wsbcAccumulatedUnrealizedGainsLossesOnSecuritiesAvailableForSaleMember_20190701_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:DebtAndEquitySecuritiesGainLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R75": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "wsbc:AllowanceForLoanCommitments",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100750 - Disclosure - Commitments and Contingent Liabilities - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetail",
     "shortName": "Commitments and Contingent Liabilities - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-5",
      "lang": null,
      "name": "us-gaap:GuaranteeObligationsCurrentCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R76": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "wsbc:CommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "wsbc:LinesOfCredit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100760 - Disclosure - Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesCommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingDetail",
     "shortName": "Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "wsbc:CommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "wsbc:LinesOfCredit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R77": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:NumberOfOperatingSegments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcSegment",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100770 - Disclosure - Business Segments - Additional Information (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
     "shortName": "Business Segments - Additional Information (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "us-gaap:SegmentReportingDisclosureTextBlock",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": "INF",
      "first": true,
      "lang": null,
      "name": "us-gaap:NumberOfOperatingSegments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_wsbcSegment",
      "xsiNil": "false"
     }
    },
    "R78": {
     "firstAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190701_20190930",
      "decimals": "-3",
      "first": true,
      "lang": null,
      "name": "us-gaap:InterestAndDividendIncomeOperating",
      "reportCount": 1,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100780 - Disclosure - Business Segments - Financial Information by Business Segment (Detail)",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
     "shortName": "Business Segments - Financial Information by Business Segment (Detail)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "p",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_us-gaapStatementBusinessSegmentsAxis_wsbcCommunityBankingMember_20190701_20190930",
      "decimals": "-3",
      "lang": null,
      "name": "us-gaap:InterestAndDividendIncomeOperating",
      "reportCount": 1,
      "unique": true,
      "unitRef": "U_iso4217USD",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100070 - Disclosure - Summary of Significant Accounting Policies",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies",
     "shortName": "Summary of Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SignificantAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "100080 - Disclosure - Mergers and Acquisitions",
     "role": "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitions",
     "shortName": "Mergers and Acquisitions",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "body",
       "html"
      ],
      "baseRef": "wsbc-10q_20190930.htm",
      "contextRef": "C_0000203596_20190101_20190930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:BusinessCombinationDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 86,
   "tag": {
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "dei_CurrentFiscalYearEndDate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "End date of current fiscal year in the format --MM-DD.",
        "label": "Current Fiscal Year End Date",
        "terseLabel": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r386"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report",
        "terseLabel": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r387"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report",
        "terseLabel": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address Address Line1",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address City Or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address State Or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock Shares Outstanding",
        "terseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status",
        "terseLabel": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category",
        "terseLabel": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation State Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r389"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current",
        "terseLabel": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company",
        "terseLabel": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business",
        "terseLabel": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r388"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_Security12bTitle": {
     "auth_ref": [
      "r384"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Title of a 12(b) registered security.",
        "label": "Security12b Title",
        "terseLabel": "Title of 12(b) Security"
       }
      }
     },
     "localname": "Security12bTitle",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "securityTitleItemType"
    },
    "dei_SecurityExchangeName": {
     "auth_ref": [
      "r385"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the Exchange on which a security is registered.",
        "label": "Security Exchange Name",
        "terseLabel": "Security Exchange Name"
       }
      }
     },
     "localname": "SecurityExchangeName",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "edgarExchangeCodeItemType"
    },
    "dei_TradingSymbol": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trading symbol of an instrument as listed on an exchange.",
        "label": "Trading Symbol",
        "verboseLabel": "Trading Symbol"
       }
      }
     },
     "localname": "TradingSymbol",
     "nsuri": "http://xbrl.sec.gov/dei/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DocumentDocumentAndEntityInformation"
     ],
     "xbrltype": "tradingSymbolItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Maximum [Member]",
        "terseLabel": "Maximum [Member]"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Minimum [Member]",
        "terseLabel": "Minimum [Member]"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r101",
      "r204",
      "r205",
      "r378",
      "r379"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product Or Service [Axis]",
        "terseLabel": "Product and Service"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Products And Services [Domain]",
        "terseLabel": "Product and Service"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Range [Axis]",
        "terseLabel": "Statistical Measurement"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Range [Member]",
        "terseLabel": "Statistical Measurement"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_WeightedAverageMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Weighted Average [Member]",
        "terseLabel": "Weighted Average [Member]"
       }
      }
     },
     "localname": "WeightedAverageMember",
     "nsuri": "http://fasb.org/srt/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingPoliciesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Accounting Policies [Abstract]"
       }
      }
     },
     "localname": "AccountingPoliciesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccountingStandardsUpdate201712Member": {
     "auth_ref": [
      "r273"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accounting Standards Update 2017-12 Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.",
        "label": "Accounting Standards Update201712 [Member]",
        "terseLabel": "Accounting Standards Update 2017-12 [Member]"
       }
      }
     },
     "localname": "AccountingStandardsUpdate201712Member",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": {
     "auth_ref": [
      "r25",
      "r30",
      "r31",
      "r219",
      "r254"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.",
        "label": "Accumulated Defined Benefit Plans Adjustment [Member]",
        "terseLabel": "Accumulated Defined Benefit Plans Adjustment [Member]"
       }
      }
     },
     "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax": {
     "auth_ref": [
      "r29"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax",
        "terseLabel": "Net unrealized gains (losses) on available-for-sale securities included in AOCI"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Accumulated Other Comprehensive Income Loss [Line Items]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Line Items]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r28",
      "r29",
      "r30"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10080.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.",
        "label": "Accumulated Other Comprehensive Income Loss Net Of Tax",
        "terseLabel": "Accumulated other comprehensive income (loss)"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).",
        "label": "Accumulated Other Comprehensive Income Loss [Table]",
        "terseLabel": "Accumulated Other Comprehensive Income Loss [Table]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r27",
      "r30",
      "r31",
      "r254"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.",
        "label": "Accumulated Other Comprehensive Income [Member]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Member]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapitalCommonStock": {
     "auth_ref": [
      "r10"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10050.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.",
        "label": "Additional Paid In Capital Common Stock",
        "terseLabel": "Capital surplus"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.",
        "label": "Additional Paid In Capital [Member]",
        "terseLabel": "Capital Surplus [Member]"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": {
     "auth_ref": [
      "r81"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by new accounting pronouncement.",
        "label": "Adjustments For New Accounting Pronouncements [Axis]",
        "terseLabel": "Adjustments for New Accounting Pronouncements"
       }
      }
     },
     "localname": "AdjustmentsForNewAccountingPronouncementsAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": {
     "auth_ref": [
      "r229",
      "r230",
      "r233",
      "r234"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.",
        "label": "Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value",
        "terseLabel": "Stock compensation expense"
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdvancesFromFederalHomeLoanBanks": {
     "auth_ref": [
      "r362"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10140.0,
       "parentTag": "us-gaap_DebtAndCapitalLeaseObligations",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.",
        "label": "Advances From Federal Home Loan Banks",
        "terseLabel": "Federal Home Loan Bank borrowings"
       }
      }
     },
     "localname": "AdvancesFromFederalHomeLoanBanks",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock": {
     "auth_ref": [
      "r112",
      "r161"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of allowance for credit loss on financing receivable.",
        "label": "Allowance For Credit Losses On Financing Receivables Table [Text Block]",
        "terseLabel": "Summary of Changes in Allowance for Credit Losses"
       }
      }
     },
     "localname": "AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts": {
     "auth_ref": [
      "r109"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.",
        "label": "Allowance For Loan And Lease Loss Recovery Of Bad Debts",
        "terseLabel": "Recoveries"
       }
      }
     },
     "localname": "AllowanceForLoanAndLeaseLossRecoveryOfBadDebts",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs": {
     "auth_ref": [
      "r108",
      "r336"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.",
        "label": "Allowance For Loan And Lease Losses Write Offs",
        "negatedLabel": "Charge-offs"
       }
      }
     },
     "localname": "AllowanceForLoanAndLeaseLossesWriteOffs",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNet": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after recoveries, of loans and leases that have been written-off.",
        "label": "Allowance For Loan And Lease Losses Writeoffs Net",
        "negatedLabel": "Net charge-offs"
       }
      }
     },
     "localname": "AllowanceForLoanAndLeaseLossesWriteoffsNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AmortizationOfIntangibleAssets": {
     "auth_ref": [
      "r68",
      "r183",
      "r188"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10120.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.",
        "label": "Amortization Of Intangible Assets",
        "terseLabel": "Amortization of intangible assets"
       }
      }
     },
     "localname": "AmortizationOfIntangibleAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": {
     "auth_ref": [
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.",
        "label": "Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount",
        "terseLabel": "Securities excluded from computation of net income per diluted shares"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": {
     "auth_ref": [
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of antidilutive security.",
        "label": "Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]",
        "terseLabel": "Antidilutive Securities"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AntidilutiveSecuritiesNameDomain": {
     "auth_ref": [
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.",
        "label": "Antidilutive Securities Name [Domain]",
        "terseLabel": "Antidilutive Securities, Name"
       }
      }
     },
     "localname": "AntidilutiveSecuritiesNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ArrangementsAndNonarrangementTransactionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.",
        "label": "Arrangements And Nonarrangement Transactions [Member]",
        "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative"
       }
      }
     },
     "localname": "ArrangementsAndNonarrangementTransactionsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r98",
      "r322",
      "r367"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets",
        "terseLabel": "Total Assets",
        "totalLabel": "Total Assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets [Abstract]",
        "terseLabel": "ASSETS"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsFairValueAdjustment": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.",
        "label": "Assets Fair Value Adjustment",
        "terseLabel": "Fair market value adjustment of acquired loans"
       }
      }
     },
     "localname": "AssetsFairValueAdjustment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsFairValueDisclosure": {
     "auth_ref": [
      "r275"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets Fair Value Disclosure",
        "terseLabel": "Total assets recurring fair value measurements"
       }
      }
     },
     "localname": "AssetsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": {
     "auth_ref": [
      "r147"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10070.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax",
        "terseLabel": "Available-for-sale, Gross Unrealized Gains"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": {
     "auth_ref": [
      "r148"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10080.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax",
        "negatedLabel": "Available-for-sale, Gross Unrealized Losses"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": {
     "auth_ref": [
      "r145",
      "r174"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10110.0,
       "parentTag": "wsbc_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Available For Sale Debt Securities Amortized Cost Basis",
        "totalLabel": "Available-for-sale, Amortized Cost"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Available For Sale Securities [Abstract]",
        "terseLabel": "Available-for-sale debt securities:"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10170.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis",
        "terseLabel": "Total available-for-sale debt securities, Amortized Cost, Less than one year"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10070.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value",
        "terseLabel": "Total available-for-sale debt securities, Fair Value, Less than one year"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10200.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis",
        "terseLabel": "Total available-for-sale debt securities, Amortized Cost, Over 10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10100.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value",
        "terseLabel": "Total available-for-sale debt securities, Fair Value, Over 10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10190.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis",
        "terseLabel": "Total available-for-sale debt securities, Amortized Cost, 5-10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10090.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value",
        "terseLabel": "Total available-for-sale debt securities, Fair Value, 5-10 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10180.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis",
        "terseLabel": "Total available-for-sale debt securities, Amortized Cost, 1-5 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10080.0,
       "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value",
        "terseLabel": "Total available-for-sale debt securities, Fair Value, 1-5 years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecurities": {
     "auth_ref": [
      "r142",
      "r146",
      "r174"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_InvestmentsFairValueDisclosure",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10090.0,
       "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10340.0,
       "parentTag": "us-gaap_MarketableSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Available For Sale Securities Debt Securities",
        "positiveLabel": "Available-for-sale debt securities",
        "terseLabel": "Available-for-sale debt securities, at fair value",
        "totalLabel": "Total available-for-sale debt securities, Fair Value",
        "verboseLabel": "Available-for-sale, Estimated Fair Value"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesGrossRealizedGains": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": 10050.0,
       "parentTag": "us-gaap_GainLossOnSaleOfDebtInvestments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.",
        "label": "Available For Sale Securities Gross Realized Gains",
        "terseLabel": "Gross realized gains"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesGrossRealizedGains",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": 10060.0,
       "parentTag": "us-gaap_GainLossOnSaleOfDebtInvestments",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.",
        "label": "Available For Sale Securities Gross Realized Losses",
        "negatedLabel": "Gross realized losses"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesGrossRealizedLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BankOwnedLifeInsurance": {
     "auth_ref": [
      "r328"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10290.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.",
        "label": "Bank Owned Life Insurance",
        "terseLabel": "Bank-owned life insurance"
       }
      }
     },
     "localname": "BankOwnedLifeInsurance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BankOwnedLifeInsuranceIncome": {
     "auth_ref": [
      "r348"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10190.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.",
        "label": "Bank Owned Life Insurance Income",
        "terseLabel": "Bank-owned life insurance"
       }
      }
     },
     "localname": "BankOwnedLifeInsuranceIncome",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).",
        "label": "Basis Of Accounting Policy Policy [Text Block]",
        "terseLabel": "Basis of presentation"
       }
      }
     },
     "localname": "BasisOfAccountingPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BrokerageCommissionsRevenue": {
     "auth_ref": [
      "r317",
      "r347"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10180.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of commission revenue from buying and selling securities on behalf of customers.",
        "label": "Brokerage Commissions Revenue",
        "terseLabel": "Net securities brokerage revenue",
        "verboseLabel": "Total net securities brokerage revenue"
       }
      }
     },
     "localname": "BrokerageCommissionsRevenue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessAcquisitionAcquireeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.",
        "label": "Business Acquisition Acquiree [Domain]",
        "terseLabel": "Business Acquisition, Acquiree"
       }
      }
     },
     "localname": "BusinessAcquisitionAcquireeDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessAcquisitionAxis": {
     "auth_ref": [
      "r238",
      "r239"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business combination or series of individually immaterial business combinations.",
        "label": "Business Acquisition [Axis]",
        "terseLabel": "Business Acquisition"
       }
      }
     },
     "localname": "BusinessAcquisitionAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued": {
     "auth_ref": [
      "r250"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares of equity interests issued or issuable to acquire entity.",
        "label": "Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued",
        "terseLabel": "Number of shares issued for acquisition"
       }
      }
     },
     "localname": "BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_BusinessAcquisitionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Business Acquisition [Line Items]",
        "terseLabel": "Business Acquisition [Line Items]"
       }
      }
     },
     "localname": "BusinessAcquisitionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessAcquisitionSharePrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.",
        "label": "Business Acquisition Share Price",
        "terseLabel": "Business acquisition, price per share"
       }
      }
     },
     "localname": "BusinessAcquisitionSharePrice",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_BusinessCombinationAcquiredReceivablesFairValue": {
     "auth_ref": [
      "r241"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10060.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of acquired receivable from business combination, excluding certain loans and debt securities acquired in transfer.",
        "label": "Business Combination Acquired Receivables Fair Value",
        "terseLabel": "Loans",
        "verboseLabel": "Fair value of acquired loans"
       }
      }
     },
     "localname": "BusinessCombinationAcquiredReceivablesFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationAcquisitionRelatedCosts": {
     "auth_ref": [
      "r236"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.",
        "label": "Business Combination Acquisition Related Costs",
        "terseLabel": "Merger related expense"
       }
      }
     },
     "localname": "BusinessCombinationAcquisitionRelatedCosts",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferred1": {
     "auth_ref": [
      "r246",
      "r247",
      "r248"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.",
        "label": "Business Combination Consideration Transferred1",
        "terseLabel": "Value of acquisition",
        "totalLabel": "Total purchase price"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferred1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable": {
     "auth_ref": [
      "r246",
      "r247"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_BusinessCombinationConsiderationTransferred1",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.",
        "label": "Business Combination Consideration Transferred Equity Interests Issued And Issuable",
        "terseLabel": "Fair value of WesBanco shares issued"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombinationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combination Consideration Transferred Including Equity Interest In Acquiree Held Prior To Combination [Abstract]",
        "terseLabel": "Purchase price:"
       }
      }
     },
     "localname": "BusinessCombinationConsiderationTransferredIncludingEquityInterestInAcquireeHeldPriorToCombinationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationDisclosureTextBlock": {
     "auth_ref": [
      "r252"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).",
        "label": "Business Combination Disclosure [Text Block]",
        "terseLabel": "Mergers and Acquisitions"
       }
      }
     },
     "localname": "BusinessCombinationDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitions"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of assets acquired at the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets",
        "totalLabel": "Total assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents",
        "terseLabel": "Net cash received in the acquisition",
        "verboseLabel": "Cash and due from banks"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities",
        "terseLabel": "Securities"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of intangible assets, excluding goodwill, acquired at the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill",
        "terseLabel": "Purchase price allocation in core deposit intangible",
        "verboseLabel": "Core deposit and other intangible assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities assumed at the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities",
        "negatedLabel": "Liabilities assumed",
        "totalLabel": "Total liabilities assumed"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities [Abstract]",
        "terseLabel": "Liabilities assumed"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet": {
     "auth_ref": [
      "r240",
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net",
        "terseLabel": "Fair value of net assets acquired",
        "totalLabel": "Fair value of net assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net [Abstract]",
        "terseLabel": "Fair value of:"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other",
        "terseLabel": "Accrued expenses and other liabilities"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets": {
     "auth_ref": [
      "r242"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10080.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets",
        "terseLabel": "Accrued income and other assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment": {
     "auth_ref": [
      "r240",
      "r242"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of property, plant, and equipment recognized as of the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment",
        "terseLabel": "Premises and equipment"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet": {
     "auth_ref": [
      "r242"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.",
        "label": "Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net",
        "terseLabel": "Net assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BusinessCombinationSegmentAllocationTableTextBlock": {
     "auth_ref": [
      "r251"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of goodwill in a business combination.",
        "label": "Business Combination Segment Allocation Table [Text Block]",
        "terseLabel": "Summary of Final Purchase Price of Acquisition and Resulting Goodwill"
       }
      }
     },
     "localname": "BusinessCombinationSegmentAllocationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis": {
     "auth_ref": [
      "r237"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosures related to transactions that are recognized separately from the acquisition of assets and assumptions of liabilities in the business combination by type of transaction.",
        "label": "Business Combination Separately Recognized Transactions [Axis]",
        "terseLabel": "Business Combination, Separately Recognized Transactions"
       }
      }
     },
     "localname": "BusinessCombinationSeparatelyRecognizedTransactionsAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsDomain": {
     "auth_ref": [
      "r237"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Type of transaction that is recognized separately from the acquisition of assets and assumptions of liabilities in a business combination by transaction.",
        "label": "Business Combination Separately Recognized Transactions [Domain]",
        "terseLabel": "Business Combination, Separately Recognized Transactions"
       }
      }
     },
     "localname": "BusinessCombinationSeparatelyRecognizedTransactionsDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BusinessCombinationsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Business Combinations [Abstract]"
       }
      }
     },
     "localname": "BusinessCombinationsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CarryingReportedAmountFairValueDisclosureMember": {
     "auth_ref": [
      "r291",
      "r292"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measured as reported on the statement of financial position (balance sheet).",
        "label": "Carrying Reported Amount Fair Value Disclosure [Member]",
        "terseLabel": "Carrying Amount [Member]"
       }
      }
     },
     "localname": "CarryingReportedAmountFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r1",
      "r15",
      "r70"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10220.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash And Cash Equivalents At Carrying Value",
        "terseLabel": "Cash and due from banks, including interest bearing amounts of $34,727 and $44,536, respectively",
        "verboseLabel": "Cash and due from banks"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r63",
      "r70",
      "r77"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents",
        "periodEndLabel": "Cash and cash equivalents at end of the period",
        "periodStartLabel": "Cash and cash equivalents at beginning of the period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r63",
      "r293"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect",
        "totalLabel": "Net increase in cash and cash equivalents"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield": {
     "auth_ref": [
      "r134",
      "r136"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield",
        "periodEndLabel": "Balance at end of period",
        "periodStartLabel": "Balance at beginning of period"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion": {
     "auth_ref": [
      "r134",
      "r136"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion",
        "negatedLabel": "Accretion"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions": {
     "auth_ref": [
      "r134",
      "r136"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of additions to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions",
        "terseLabel": "Acquisitions"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans": {
     "auth_ref": [
      "r134",
      "r136"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of reduction, resulting from a sale or transfer of a loan, in the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans",
        "negatedLabel": "Transfers out"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference": {
     "auth_ref": [
      "r134",
      "r136"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase of reclassification from nonaccretable difference to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference",
        "terseLabel": "Reclass from non-accretable difference"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period [Abstract]"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue": {
     "auth_ref": [
      "r134",
      "r137"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value",
        "terseLabel": "Fair market value adjustment of acquired loans"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses": {
     "auth_ref": [
      "r134",
      "r139"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected.  This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses",
        "terseLabel": "Acquired impaired loans allowances for loan losses"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet": {
     "auth_ref": [
      "r134",
      "r135"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses).  This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net",
        "terseLabel": "Acquired with deteriorated credit quality",
        "verboseLabel": "Loans acquired with deteriorated credit quality"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesConsumerOutstandingBalance": {
     "auth_ref": [
      "r134",
      "r135"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor.  This relates to consumer loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Consumer Outstanding Balance",
        "terseLabel": "Loans acquired with deteriorated credit quality outstanding customer balance"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesConsumerOutstandingBalance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CollateralAlreadyPostedAggregateFairValue": {
     "auth_ref": [
      "r270"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.",
        "label": "Collateral Already Posted Aggregate Fair Value",
        "terseLabel": "Collateral posted with market value on liability positions with credit risk-related contingent features"
       }
      }
     },
     "localname": "CollateralAlreadyPostedAggregateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommercialMortgageBackedSecuritiesMember": {
     "auth_ref": [
      "r149",
      "r211"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities collateralized by commercial real estate mortgage loans.",
        "label": "Commercial Mortgage Backed Securities [Member]",
        "terseLabel": "Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]"
       }
      }
     },
     "localname": "CommercialMortgageBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommercialPortfolioSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portfolio segment of the company's total financing receivables related to commercial receivables.",
        "label": "Commercial Portfolio Segment [Member]",
        "terseLabel": "Commercial Portfolio Segment [Member]"
       }
      }
     },
     "localname": "CommercialPortfolioSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommercialRealEstatePortfolioSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portfolio segment of the company's total financing receivables related to commercial real estate.",
        "label": "Commercial Real Estate Portfolio Segment [Member]",
        "terseLabel": "Commercial Real Estate [Member]"
       }
      }
     },
     "localname": "CommercialRealEstatePortfolioSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Commitments And Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": {
     "auth_ref": [
      "r195",
      "r196"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for commitments and contingencies.",
        "label": "Commitments And Contingencies Disclosure [Text Block]",
        "terseLabel": "Commitments and Contingent Liabilities"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilities"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommonStockDividendsPerShareDeclared": {
     "auth_ref": [
      "r200"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.",
        "label": "Common Stock Dividends Per Share Declared",
        "terseLabel": "DIVIDENDS DECLARED PER COMMON SHARE",
        "verboseLabel": "Common dividends declared, per share"
       }
      }
     },
     "localname": "CommonStockDividendsPerShareDeclared",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "terseLabel": "Common Stock [Member]"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r8"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common Stock Par Or Stated Value Per Share",
        "terseLabel": "Common stock, par value"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r8"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.",
        "label": "Common Stock Shares Authorized",
        "terseLabel": "Common stock, shares authorized"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r8"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.",
        "label": "Common Stock Shares Issued",
        "terseLabel": "Common stock, shares issued"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r8",
      "r199"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.",
        "label": "Common Stock Shares Outstanding",
        "terseLabel": "Common stock, shares outstanding"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r8"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10040.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Common Stock Value",
        "terseLabel": "Common stock, $2.0833 par value; 100,000,000 shares authorized in 2019 and 2018, respectively; 54,698,250 and 54,604,294 shares issued, respectively; 54,691,225 and 54,598,134 shares outstanding, respectively"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CompensationAndRetirementDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Compensation And Retirement Disclosure [Abstract]"
       }
      }
     },
     "localname": "CompensationAndRetirementDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r34",
      "r36",
      "r37"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income Net Of Tax",
        "terseLabel": "COMPREHENSIVE INCOME",
        "totalLabel": "Comprehensive income"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNoteTextBlock": {
     "auth_ref": [
      "r48"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.",
        "label": "Comprehensive Income Note [Text Block]",
        "terseLabel": "Comprehensive Income/(Loss)"
       }
      }
     },
     "localname": "ComprehensiveIncomeNoteTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLoss"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ConsumerPortfolioSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portfolio segment of the company's total financing receivables related to consumer receivables.",
        "label": "Consumer Portfolio Segment [Member]",
        "terseLabel": "Consumer [Member]"
       }
      }
     },
     "localname": "ConsumerPortfolioSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r211",
      "r227",
      "r380"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt securities issued by domestic or foreign corporate business, banks and other entities with a promise of repayment.",
        "label": "Corporate Debt Securities [Member]",
        "terseLabel": "Corporate Debt Securities [Member]"
       }
      }
     },
     "localname": "CorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CriticizedMember": {
     "auth_ref": [
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Credit rating classification which identifies weaknesses related to credit risk. Includes, but is not limited to, special mention, substandard and doubtful classifications. Excludes noncriticized classification.",
        "label": "Criticized [Member]",
        "terseLabel": "Criticized [Member]"
       }
      }
     },
     "localname": "CriticizedMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.",
        "label": "Cumulative Effect Of New Accounting Principle In Period Of Adoption",
        "terseLabel": "Adoption of Accounting Standard ASU 2016-01"
       }
      }
     },
     "localname": "CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CustomerRelatedIntangibleAssetsMember": {
     "auth_ref": [
      "r244"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Customer-related asset, including, but not limited to, customer lists, and noncontractual customer relationships.",
        "label": "Customer Related Intangible Assets [Member]",
        "terseLabel": "Customer-Related Intangible Assets [Member]"
       }
      }
     },
     "localname": "CustomerRelatedIntangibleAssetsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CustomerRelationshipsMember": {
     "auth_ref": [
      "r245"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Customer relationship that exists between an entity and its customer, for example, but not limited to, tenant relationships.",
        "label": "Customer Relationships [Member]",
        "terseLabel": "Customer Relationships [Member]"
       }
      }
     },
     "localname": "CustomerRelationshipsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtAndCapitalLeaseObligations": {
     "auth_ref": [
      "r330",
      "r372"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10110.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of short-term and long-term debt and lease obligation.",
        "label": "Debt And Capital Lease Obligations",
        "totalLabel": "Total borrowings"
       }
      }
     },
     "localname": "DebtAndCapitalLeaseObligations",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtAndEquitySecuritiesGainLoss": {
     "auth_ref": [
      "r44",
      "r45"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10210.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unrealized and realized gain (loss) on investment in debt and equity securities.",
        "label": "Debt And Equity Securities Gain Loss",
        "negatedLabel": "Net securities gains reclassified into earnings",
        "terseLabel": "Net securities gains",
        "totalLabel": "Net securities gains"
       }
      }
     },
     "localname": "DebtAndEquitySecuritiesGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesHeldToMaturityTransferAmount": {
     "auth_ref": [
      "r144"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security, measured at amortized cost, transferred to investment in debt security, measured at fair value, with change in fair value recognized in other comprehensive income (available-for-sale) and net income (trading).",
        "label": "Debt Securities Held To Maturity Transfer Amount",
        "terseLabel": "Transfer of held-to-maturity debt securities to available-for-sale debt securities"
       }
      }
     },
     "localname": "DebtSecuritiesHeldToMaturityTransferAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesMember": {
     "auth_ref": [
      "r156"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.",
        "label": "Debt Securities [Member]",
        "terseLabel": "Debt Securities [Member]"
       }
      }
     },
     "localname": "DebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain": {
     "auth_ref": [
      "r206",
      "r207"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferred compensation that is not equivalent to a defined benefit pension plan or a defined benefit other postretirement benefit plan. Includes, but is not limited to, employment contracts with one or more selected officers or key employees. Excludes equity-based compensation plans, defined benefit pension plans and defined benefit other postretirement benefit plans.",
        "label": "Deferred Bonus And Profit Sharing Arrangement Individual Contract Type Of Deferred Compensation [Domain]",
        "terseLabel": "Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation"
       }
      }
     },
     "localname": "DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis": {
     "auth_ref": [
      "r206",
      "r207"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of deferred compensation that is not equivalent to a defined benefit pension plan or a defined benefit other postretirement benefit plan. Includes, but is not limited to, employment contracts with one or more selected officers or key employees. Excludes equity-based compensation plans, defined benefit pension plans and defined benefit other postretirement benefit plans.",
        "label": "Deferred Compensation Arrangement With Individual Excluding Share Based Payments And Postretirement Benefits By Type Of Deferred Compensation [Axis]",
        "terseLabel": "Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation"
       }
      }
     },
     "localname": "DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DeferredCompensationShareBasedPaymentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferred compensation arrangements (such as stock or unit options and share or unit awards) that are equity-based payments with individual employees. The arrangements are generally based on employment contracts between the entity and one or more selected officers or key employees, and contain a promise by the employer to pay certain amounts or benefits at designated future dates, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Other \"sub-members\" can be added as necessary.",
        "label": "Deferred Compensation Share Based Payments [Member]",
        "terseLabel": "Deferred Benefits for Directors [Member]"
       }
      }
     },
     "localname": "DeferredCompensationShareBasedPaymentsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses": {
     "auth_ref": [
      "r217",
      "r224",
      "r227"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.",
        "label": "Defined Benefit Plan Amortization Of Gains Losses",
        "negatedLabel": "Amortization of net loss"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationOfGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit": {
     "auth_ref": [
      "r218",
      "r225",
      "r227"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.",
        "label": "Defined Benefit Plan Amortization Of Prior Service Cost Credit",
        "terseLabel": "Amortization of prior service cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationOfPriorServiceCostCredit",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanBenefitObligation": {
     "auth_ref": [
      "r208"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "label": "Defined Benefit Plan Benefit Obligation",
        "terseLabel": "Available credit balance"
       }
      }
     },
     "localname": "DefinedBenefitPlanBenefitObligation",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear": {
     "auth_ref": [
      "r226"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year.",
        "label": "Defined Benefit Plan Expected Future Employer Contributions Current Fiscal Year",
        "terseLabel": "Minimum required pension plan contribution"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": {
     "auth_ref": [
      "r216",
      "r223",
      "r227"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.",
        "label": "Defined Benefit Plan Expected Return On Plan Assets",
        "negatedLabel": "Expected return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanInterestCost": {
     "auth_ref": [
      "r210",
      "r215",
      "r222",
      "r227"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.",
        "label": "Defined Benefit Plan Interest Cost",
        "terseLabel": "Interest cost on projected benefit obligation"
       }
      }
     },
     "localname": "DefinedBenefitPlanInterestCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": {
     "auth_ref": [
      "r213",
      "r220",
      "r227"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.",
        "label": "Defined Benefit Plan Net Periodic Benefit Cost",
        "totalLabel": "Net periodic pension cost"
       }
      }
     },
     "localname": "DefinedBenefitPlanNetPeriodicBenefitCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Defined Benefit Plan Net Periodic Benefit Cost [Abstract]"
       }
      }
     },
     "localname": "DefinedBenefitPlanNetPeriodicBenefitCostAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanServiceCost": {
     "auth_ref": [
      "r209",
      "r214",
      "r221",
      "r227"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "label": "Defined Benefit Plan Service Cost",
        "terseLabel": "Service cost \u2013 benefits earned during year"
       }
      }
     },
     "localname": "DefinedBenefitPlanServiceCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansDefinedBenefitPensionPlanDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepositAccountMember": {
     "auth_ref": [
      "r205"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Bank account at depository institution allowing money to be withdrawn or deposited by account holder.",
        "label": "Deposit Account [Member]",
        "terseLabel": "Service Charges on Deposits [Member]"
       }
      }
     },
     "localname": "DepositAccountMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Deposits": {
     "auth_ref": [
      "r329"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10100.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.",
        "label": "Deposits",
        "terseLabel": "Deposits",
        "totalLabel": "Total deposits"
       }
      }
     },
     "localname": "Deposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepositsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Deposits [Abstract]",
        "terseLabel": "Deposits:"
       }
      }
     },
     "localname": "DepositsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DepositsMember": {
     "auth_ref": [
      "r358"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amounts held on account by the entity representing a liability to the depositor. Deposits may take various forms (for example, demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits) and may be categorized in multiple ways (such as, foreign and domestic, interest and noninterest bearing).",
        "label": "Deposits [Member]",
        "terseLabel": "Total Service Charges on Deposits [Member]"
       }
      }
     },
     "localname": "DepositsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DepositsMoneyMarketDeposits": {
     "auth_ref": [
      "r329"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10190.0,
       "parentTag": "us-gaap_Deposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts.",
        "label": "Deposits Money Market Deposits",
        "terseLabel": "Money market"
       }
      }
     },
     "localname": "DepositsMoneyMarketDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepositsNegotiableOrderOfWithdrawalNOW": {
     "auth_ref": [
      "r329"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10180.0,
       "parentTag": "us-gaap_Deposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written.",
        "label": "Deposits Negotiable Order Of Withdrawal N O W",
        "terseLabel": "Interest bearing demand"
       }
      }
     },
     "localname": "DepositsNegotiableOrderOfWithdrawalNOW",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepositsSavingsDeposits": {
     "auth_ref": [
      "r329"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10200.0,
       "parentTag": "us-gaap_Deposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).",
        "label": "Deposits Savings Deposits",
        "terseLabel": "Savings deposits"
       }
      }
     },
     "localname": "DepositsSavingsDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssets": {
     "auth_ref": [
      "r22",
      "r23",
      "r290"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.",
        "label": "Derivative Assets",
        "terseLabel": "Asset Derivatives"
       }
      }
     },
     "localname": "DerivativeAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeContractTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.",
        "label": "Derivative Contract Type [Domain]",
        "terseLabel": "Derivative Contract"
       }
      }
     },
     "localname": "DerivativeContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeGainLossOnDerivativeNet": {
     "auth_ref": [
      "r259"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.",
        "label": "Derivative Gain Loss On Derivative Net",
        "terseLabel": "Net gain (loss) on change in fair value",
        "verboseLabel": "Total gain (loss) on derivative financial instruments"
       }
      }
     },
     "localname": "DerivativeGainLossOnDerivativeNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeInstrumentDetailAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Derivative Instrument Detail [Abstract]"
       }
      }
     },
     "localname": "DerivativeInstrumentDetailAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentRiskAxis": {
     "auth_ref": [
      "r258",
      "r260",
      "r263",
      "r267"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of derivative contract.",
        "label": "Derivative Instrument Risk [Axis]",
        "terseLabel": "Derivative Instrument"
       }
      }
     },
     "localname": "DerivativeInstrumentRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Derivative Instruments And Hedging Activities Disclosure [Abstract]"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": {
     "auth_ref": [
      "r274"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.",
        "label": "Derivative Instruments And Hedging Activities Disclosure [Text Block]",
        "terseLabel": "Derivatives and Hedging Activities"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivities"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Derivative Instruments And Hedging Activities Disclosures [Line Items]",
        "terseLabel": "Derivative Instruments and Hedging Activities Disclosures [Line Items]"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about derivatives and hedging activities.",
        "label": "Derivative Instruments And Hedging Activities Disclosures [Table]",
        "terseLabel": "Derivative Instruments And Hedging Activities Disclosures [Table]"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet": {
     "auth_ref": [
      "r262",
      "r264"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.",
        "label": "Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net",
        "terseLabel": "Income (loss) on derivative instrument not designated hedges"
       }
      }
     },
     "localname": "DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeLiabilities": {
     "auth_ref": [
      "r22",
      "r23",
      "r290"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.",
        "label": "Derivative Liabilities",
        "terseLabel": "Liability Derivatives"
       }
      }
     },
     "localname": "DerivativeLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeNotionalAmount": {
     "auth_ref": [
      "r255",
      "r256"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payment on derivative.",
        "label": "Derivative Notional Amount",
        "terseLabel": "Aggregate notional amount",
        "verboseLabel": "Notional or Contractual Amount"
       }
      }
     },
     "localname": "DerivativeNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativesFairValueLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Derivatives Fair Value [Line Items]",
        "terseLabel": "Derivatives, Fair Value [Line Items]"
       }
      }
     },
     "localname": "DerivativesFairValueLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DividendsCommonStockCash": {
     "auth_ref": [
      "r200"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.",
        "label": "Dividends Common Stock Cash",
        "negatedLabel": "Common dividends declared"
       }
      }
     },
     "localname": "DividendsCommonStockCash",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DoubtfulMember": {
     "auth_ref": [
      "r120",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A category of financing receivables that have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.",
        "label": "Doubtful [Member]",
        "terseLabel": "Classified?doubtful [Member]"
       }
      }
     },
     "localname": "DoubtfulMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EarningsPerShareAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Earnings Per Share [Abstract]",
        "terseLabel": "EARNINGS PER COMMON SHARE"
       }
      }
     },
     "localname": "EarningsPerShareAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EarningsPerShareBasic": {
     "auth_ref": [
      "r43",
      "r82",
      "r85",
      "r88",
      "r89",
      "r90",
      "r93",
      "r341",
      "r374"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.",
        "label": "Earnings Per Share Basic",
        "terseLabel": "Basic",
        "verboseLabel": "Earnings per common share - basic"
       }
      }
     },
     "localname": "EarningsPerShareBasic",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareDiluted": {
     "auth_ref": [
      "r43",
      "r82",
      "r85",
      "r88",
      "r89",
      "r90",
      "r93",
      "r341",
      "r374"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.",
        "label": "Earnings Per Share Diluted",
        "terseLabel": "Diluted",
        "verboseLabel": "Earnings per common share - diluted"
       }
      }
     },
     "localname": "EarningsPerShareDiluted",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_EarningsPerShareTextBlock": {
     "auth_ref": [
      "r94"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for earnings per share.",
        "label": "Earnings Per Share [Text Block]",
        "terseLabel": "Earnings Per Common Share"
       }
      }
     },
     "localname": "EarningsPerShareTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShare"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EmployeeStockOptionMember": {
     "auth_ref": [
      "r232"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.",
        "label": "Employee Stock Option [Member]",
        "terseLabel": "Stock Option [Member]"
       }
      }
     },
     "localname": "EmployeeStockOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquipmentExpense": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10090.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item may also include furniture expenses.",
        "label": "Equipment Expense",
        "terseLabel": "Equipment"
       }
      }
     },
     "localname": "EquipmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Equity [Abstract]"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r199"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.",
        "label": "Equity Component [Domain]",
        "terseLabel": "Equity Component"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesFvNi": {
     "auth_ref": [
      "r288"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10330.0,
       "parentTag": "us-gaap_MarketableSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "label": "Equity Securities Fv Ni",
        "positiveLabel": "Equity securities",
        "positiveTerseLabel": "Equity securities",
        "terseLabel": "Equity securities, at fair value",
        "verboseLabel": "Equities securities"
       }
      }
     },
     "localname": "EquitySecuritiesFvNi",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquitySecuritiesMember": {
     "auth_ref": [
      "r2",
      "r6",
      "r156",
      "r325",
      "r365",
      "r382"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.",
        "label": "Equity Securities [Member]",
        "terseLabel": "Equity Securities [Member]"
       }
      }
     },
     "localname": "EquitySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EstimateOfFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r290"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measured as an estimate of fair value.",
        "label": "Estimate Of Fair Value Fair Value Disclosure [Member]",
        "terseLabel": "Fair Value Estimate [Member]"
       }
      }
     },
     "localname": "EstimateOfFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r275",
      "r276",
      "r277",
      "r284"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.",
        "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]",
        "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock": {
     "auth_ref": [
      "r275",
      "r276",
      "r277",
      "r283",
      "r284"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.",
        "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Table [Text Block]",
        "terseLabel": "Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": {
     "auth_ref": [
      "r278"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]",
        "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock": {
     "auth_ref": [
      "r278"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique used to measure similar asset in prior period by class of asset or liability on non-recurring basis.",
        "label": "Fair Value Assets Measured On Nonrecurring Basis Valuation Techniques [Text Block]",
        "terseLabel": "Schedule of Assets Measured at Fair Value on Nonrecurring Basis"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]",
        "terseLabel": "Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]"
       }
      }
     },
     "localname": "FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTable": {
     "auth_ref": [
      "r275",
      "r291",
      "r292"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.",
        "label": "Fair Value By Balance Sheet Grouping [Table]",
        "terseLabel": "Fair Value By Balance Sheet Grouping [Table]"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTextBlock": {
     "auth_ref": [
      "r275",
      "r291"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.",
        "label": "Fair Value By Balance Sheet Grouping [Text Block]",
        "terseLabel": "Estimates Fair Values of Financial Instruments"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r211",
      "r212",
      "r227",
      "r276",
      "r310"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value By Fair Value Hierarchy Level [Axis]",
        "terseLabel": "Significant Other Observable Inputs (Level 2) [Member]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementBasisAxis": {
     "auth_ref": [
      "r275",
      "r285"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by measurement basis.",
        "label": "Fair Value By Measurement Basis [Axis]",
        "terseLabel": "Measurement Basis"
       }
      }
     },
     "localname": "FairValueByMeasurementBasisAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementFrequencyAxis": {
     "auth_ref": [
      "r275",
      "r276",
      "r279",
      "r280",
      "r286"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by measurement frequency.",
        "label": "Fair Value By Measurement Frequency [Axis]",
        "terseLabel": "Measurement Frequency"
       }
      }
     },
     "localname": "FairValueByMeasurementFrequencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosureItemAmountsDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement basis, for example, but not limited to, reported value, fair value, portion at fair value, portion at other than fair value.",
        "label": "Fair Value Disclosure Item Amounts [Domain]",
        "terseLabel": "Fair Value Measurement"
       }
      }
     },
     "localname": "FairValueDisclosureItemAmountsDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r211",
      "r212",
      "r227",
      "r276",
      "r311"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.",
        "label": "Fair Value Inputs Level1 [Member]",
        "terseLabel": "Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r211",
      "r212",
      "r227",
      "r276",
      "r312"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.",
        "label": "Fair Value Inputs Level2 [Member]",
        "terseLabel": "Significant Other Observable Inputs (Level 2) [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r211",
      "r212",
      "r227",
      "r276",
      "r313"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value Inputs Level3 [Member]",
        "terseLabel": "Significant Unobservable Inputs (Level 3) [Member]"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementFrequencyDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement frequency.",
        "label": "Fair Value Measurement Frequency [Domain]",
        "terseLabel": "Measurement Frequency"
       }
      }
     },
     "localname": "FairValueMeasurementFrequencyDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementInputsDisclosureTextBlock": {
     "auth_ref": [
      "r287"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis.",
        "label": "Fair Value Measurement Inputs Disclosure [Text Block]",
        "terseLabel": "Fair Value Measurement"
       }
      }
     },
     "localname": "FairValueMeasurementInputsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurement"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Measurements Fair Value Hierarchy [Domain]",
        "terseLabel": "Fair Value Hierarchy and NAV"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsNonrecurringMember": {
     "auth_ref": [
      "r275",
      "r276",
      "r279",
      "r280",
      "r281",
      "r286"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Infrequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, not frequently measured at fair value.",
        "label": "Fair Value Measurements Nonrecurring [Member]",
        "terseLabel": "Nonrecurring Fair Value Measurements [Member]",
        "verboseLabel": "Fair Value, Measurements, Nonrecurring [Member]"
       }
      }
     },
     "localname": "FairValueMeasurementsNonrecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsRecurringMember": {
     "auth_ref": [
      "r282",
      "r286"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Frequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, frequently measured at fair value.",
        "label": "Fair Value Measurements Recurring [Member]",
        "terseLabel": "Recurring Fair Value Measurements [Member]"
       }
      }
     },
     "localname": "FairValueMeasurementsRecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable": {
     "auth_ref": [
      "r257",
      "r261",
      "r272"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule that discloses the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.",
        "label": "Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]",
        "terseLabel": "Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]"
       }
      }
     },
     "localname": "FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FederalHomeLoanBankStock": {
     "auth_ref": [
      "r360"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).",
        "label": "Federal Home Loan Bank Stock",
        "terseLabel": "Federal home loan bank stock, Total"
       }
      }
     },
     "localname": "FederalHomeLoanBankStock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FiduciaryAndTrustMember": {
     "auth_ref": [
      "r205"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Person or entity with legal duty to act in best interest of client or beneficiary of trust and fiduciary relationship in which one party gives another party right to hold title to asset for benefit of beneficiary.",
        "label": "Fiduciary And Trust [Member]",
        "terseLabel": "Total Trust Fees [Member]",
        "verboseLabel": "Total Trust Fees [Member]"
       }
      }
     },
     "localname": "FiduciaryAndTrustMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialInstrumentAxis": {
     "auth_ref": [
      "r158",
      "r161",
      "r162",
      "r165",
      "r167",
      "r175",
      "r176",
      "r177",
      "r178"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of financial instrument.",
        "label": "Financial Instrument [Axis]",
        "terseLabel": "Financial Instrument"
       }
      }
     },
     "localname": "FinancialInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancialInstrumentPerformanceStatusAxis": {
     "auth_ref": [
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by category of performance or non-performance status of financial instruments.",
        "label": "Financial Instrument Performance Status [Axis]",
        "terseLabel": "Financial Instrument Performance Status"
       }
      }
     },
     "localname": "FinancialInstrumentPerformanceStatusAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancialInstrumentPerformanceStatusDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Category of performance or non-performance status of financial instruments, including but not limited to, financing receivables, loans, debt, and investments.",
        "label": "Financial Instrument Performance Status [Domain]",
        "terseLabel": "Financial Instrument Performance Status"
       }
      }
     },
     "localname": "FinancialInstrumentPerformanceStatusDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Financial Instruments Financial Assets Balance Sheet Groupings [Abstract]",
        "terseLabel": "Financial Assets"
       }
      }
     },
     "localname": "FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Financial Instruments Financial Liabilities Balance Sheet Groupings [Abstract]",
        "terseLabel": "Financial Liabilities"
       }
      }
     },
     "localname": "FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLosses": {
     "auth_ref": [
      "r106",
      "r157",
      "r159",
      "r160",
      "r326"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.",
        "label": "Financing Receivable Allowance For Credit Losses",
        "periodEndLabel": "Total ending allowance for credit losses",
        "periodStartLabel": "Total beginning allowance for credit losses",
        "totalLabel": "Total allowance for credit losses"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment": {
     "auth_ref": [
      "r110"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_FinancingReceivableAllowanceForCreditLosses",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.",
        "label": "Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment",
        "terseLabel": "Allowance for loans collectively evaluated for impairment"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1": {
     "auth_ref": [
      "r110"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_FinancingReceivableAllowanceForCreditLosses",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.",
        "label": "Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1",
        "terseLabel": "Allowance for loans individually evaluated for impairment"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Financing Receivable Allowance For Credit Losses [Line Items]",
        "terseLabel": "Financing Receivable, Allowance for Credit Losses [Line Items]"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLossesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment": {
     "auth_ref": [
      "r111"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The balance of financing receivables that were collectively evaluated for impairment.",
        "label": "Financing Receivable Collectively Evaluated For Impairment",
        "terseLabel": "Collectively evaluated for impairment"
       }
      }
     },
     "localname": "FinancingReceivableCollectivelyEvaluatedForImpairment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock": {
     "auth_ref": [
      "r120",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.",
        "label": "Financing Receivable Credit Quality Indicators Table [Text Block]",
        "terseLabel": "Summary of Commercial Loans by Risk Grade"
       }
      }
     },
     "localname": "FinancingReceivableCreditQualityIndicatorsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FinancingReceivableImpairedLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Financing Receivable Impaired [Line Items]",
        "terseLabel": "Financing Receivable, Impaired [Line Items]"
       }
      }
     },
     "localname": "FinancingReceivableImpairedLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment": {
     "auth_ref": [
      "r111"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The balance of financing receivables that were individually evaluated for impairment.",
        "label": "Financing Receivable Individually Evaluated For Impairment",
        "terseLabel": "Individually evaluated for impairment"
       }
      }
     },
     "localname": "FinancingReceivableIndividuallyEvaluatedForImpairment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableModificationsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Financing Receivable Modifications [Line Items]",
        "terseLabel": "Financing Receivable, Modifications [Line Items]"
       }
      }
     },
     "localname": "FinancingReceivableModificationsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableModificationsNumberOfContracts2": {
     "auth_ref": [
      "r122"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of financing receivables that have been modified by troubled debt restructurings.",
        "label": "Financing Receivable Modifications Number Of Contracts2",
        "terseLabel": "Number of Modifications"
       }
      }
     },
     "localname": "FinancingReceivableModificationsNumberOfContracts2",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2": {
     "auth_ref": [
      "r122"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after troubled debt restructuring, of modified financing receivable.",
        "label": "Financing Receivable Modifications Post Modification Recorded Investment2",
        "terseLabel": "Post-Modification Outstanding Recorded Investment"
       }
      }
     },
     "localname": "FinancingReceivableModificationsPostModificationRecordedInvestment2",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2": {
     "auth_ref": [
      "r122"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before troubled debt restructuring, of financing receivable to be modified.",
        "label": "Financing Receivable Modifications Pre Modification Recorded Investment2",
        "terseLabel": "Pre-Modification Outstanding Recorded Investment"
       }
      }
     },
     "localname": "FinancingReceivableModificationsPreModificationRecordedInvestment2",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableModificationsRecordedInvestment": {
     "auth_ref": [
      "r122",
      "r141"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable modified as troubled debt restructuring.",
        "label": "Financing Receivable Modifications Recorded Investment",
        "terseLabel": "TDRs"
       }
      }
     },
     "localname": "FinancingReceivableModificationsRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1": {
     "auth_ref": [
      "r124"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.",
        "label": "Financing Receivable Modifications Subsequent Default Number Of Contracts1",
        "terseLabel": "Number of Defaults"
       }
      }
     },
     "localname": "FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1": {
     "auth_ref": [
      "r123"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.",
        "label": "Financing Receivable Modifications Subsequent Default Recorded Investment1",
        "terseLabel": "Recorded Investment"
       }
      }
     },
     "localname": "FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivablePortfolioSegmentAxis": {
     "auth_ref": [
      "r158",
      "r161",
      "r168"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses.",
        "label": "Financing Receivable Portfolio Segment [Axis]",
        "terseLabel": "Financing Receivable Portfolio Segment"
       }
      }
     },
     "localname": "FinancingReceivablePortfolioSegmentAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivablePortfolioSegmentDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses.",
        "label": "Financing Receivable Portfolio Segment [Domain]",
        "terseLabel": "Financing Receivable Portfolio Segment"
       }
      }
     },
     "localname": "FinancingReceivablePortfolioSegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing": {
     "auth_ref": [
      "r127",
      "r164",
      "r173"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable 90 days or more past due and still accruing.",
        "label": "Financing Receivable Recorded Investment90 Days Past Due And Still Accruing",
        "terseLabel": "90 Days or More Past Due and Accruing"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis": {
     "auth_ref": [
      "r121",
      "r128",
      "r129",
      "r162",
      "r165",
      "r167",
      "r169",
      "r170",
      "r172",
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by class of financing receivable determined on the basis of initial measurement attribute, risk characteristics and method of monitoring and assessing credit risk.",
        "label": "Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis]",
        "terseLabel": "Class of Financing Receivable"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financing receivables determined on the basis of initial measurement attribute, risk characteristics and method of monitoring and assessing credit risk.",
        "label": "Financing Receivable Recorded Investment Class Of Financing Receivable [Domain]",
        "terseLabel": "Class of Financing Receivable"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentCurrent": {
     "auth_ref": [
      "r162",
      "r173"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable not past due.",
        "label": "Financing Receivable Recorded Investment Current",
        "terseLabel": "Current"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentCurrent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Financing Receivable Recorded Investment [Line Items]",
        "terseLabel": "Financing Receivable, Recorded Investment [Line Items]"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus": {
     "auth_ref": [
      "r126",
      "r163"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable on nonaccrual status.",
        "label": "Financing Receivable Recorded Investment Nonaccrual Status",
        "terseLabel": "Non-accrual loans"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentNonaccrualStatus",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentPastDue": {
     "auth_ref": [
      "r129",
      "r162",
      "r173"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable past due.",
        "label": "Financing Receivable Recorded Investment Past Due",
        "terseLabel": "Total Past Due"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentPastDue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivables30To59DaysPastDueMember": {
     "auth_ref": [
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financial asset more than 29 days past due but fewer than 60 days past due.",
        "label": "Financing Receivables30 To59 Days Past Due [Member]",
        "terseLabel": "30-59 Days Past Due [Member]"
       }
      }
     },
     "localname": "FinancingReceivables30To59DaysPastDueMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivables60To89DaysPastDueMember": {
     "auth_ref": [
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financial asset more than 59 days past due but fewer than 90 days past due.",
        "label": "Financing Receivables60 To89 Days Past Due [Member]",
        "terseLabel": "60-89 Days Past Due [Member]"
       }
      }
     },
     "localname": "FinancingReceivables60To89DaysPastDueMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember": {
     "auth_ref": [
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financial asset equal to or greater than 90 days past due.",
        "label": "Financing Receivables Equal To Greater Than90 Days Past Due [Member]",
        "terseLabel": "90 Days or More Past Due [Member]"
       }
      }
     },
     "localname": "FinancingReceivablesEqualToGreaterThan90DaysPastDueMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivablesPeriodPastDueAxis": {
     "auth_ref": [
      "r162",
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by time period financial asset is past due.",
        "label": "Financing Receivables Period Past Due [Axis]",
        "terseLabel": "Financial Asset, Period Past Due"
       }
      }
     },
     "localname": "FinancingReceivablesPeriodPastDueAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivablesPeriodPastDueDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Period in which financial asset is past due. Element name and standard label in Financial Asset, [numeric lower end] to [numeric higher end] [date measure] Past Due [Member] or Financial Asset, Greater Than [low end numeric value] [date measure] Past Due [Member] or Financial Asset, Less Than [high end numeric value] [date measure] Past Due [Member] formats.",
        "label": "Financing Receivables Period Past Due [Domain]",
        "terseLabel": "Financial Asset, Period Past Due"
       }
      }
     },
     "localname": "FinancingReceivablesPeriodPastDueDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": {
     "auth_ref": [
      "r184",
      "r185",
      "r187",
      "r189",
      "r316"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by major type or class of finite-lived intangible assets.",
        "label": "Finite Lived Intangible Assets By Major Class [Axis]",
        "terseLabel": "Finite-Lived Intangible Assets by Major Class"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": {
     "auth_ref": [
      "r184",
      "r186"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.",
        "label": "Finite Lived Intangible Assets Major Class Name [Domain]",
        "terseLabel": "Finite-Lived Intangible Assets, Major Class Name"
       }
      }
     },
     "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GainLossOnSaleOfDebtInvestments": {
     "auth_ref": [
      "r68"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": 10010.0,
       "parentTag": "us-gaap_DebtAndEquitySecuritiesGainLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The difference between the carrying value and the sale price of debt securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale.",
        "label": "Gain Loss On Sale Of Debt Investments",
        "totalLabel": "Net gains (losses) on debt securities"
       }
      }
     },
     "localname": "GainLossOnSaleOfDebtInvestments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSaleOfEquityInvestments": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": 10020.0,
       "parentTag": "us-gaap_DebtAndEquitySecuritiesGainLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence.",
        "label": "Gain Loss On Sale Of Equity Investments",
        "totalLabel": "Net gains (losses) on equity securities"
       }
      }
     },
     "localname": "GainLossOnSaleOfEquityInvestments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Goodwill": {
     "auth_ref": [
      "r179",
      "r180"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill",
        "periodEndLabel": "Goodwill recognized",
        "periodStartLabel": "Goodwill"
       }
      }
     },
     "localname": "Goodwill",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillAcquiredDuringPeriod": {
     "auth_ref": [
      "r181"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.",
        "label": "Goodwill Acquired During Period",
        "terseLabel": "Goodwill acquired",
        "verboseLabel": "Goodwill recognized"
       }
      }
     },
     "localname": "GoodwillAcquiredDuringPeriod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GoodwillPeriodIncreaseDecrease": {
     "auth_ref": [
      "r182"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "label": "Goodwill Period Increase Decrease",
        "terseLabel": "Increase in goodwill recognized"
       }
      }
     },
     "localname": "GoodwillPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteeObligationsCurrentCarryingValue": {
     "auth_ref": [
      "r198"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.",
        "label": "Guarantee Obligations Current Carrying Value",
        "terseLabel": "Liability associated with letters of credit"
       }
      }
     },
     "localname": "GuaranteeObligationsCurrentCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecurities": {
     "auth_ref": [
      "r142",
      "r150"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10120.0,
       "parentTag": "wsbc_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10350.0,
       "parentTag": "us-gaap_MarketableSecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at amortized cost (held-to-maturity).",
        "label": "Held To Maturity Securities",
        "positiveLabel": "Held-to-maturity debt securities",
        "terseLabel": "Held-to-maturity debt securities (fair values of $877,809 and $1,020,743, respectively)",
        "totalLabel": "Held-to-maturity, Amortized Cost"
       }
      }
     },
     "localname": "HeldToMaturitySecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain": {
     "auth_ref": [
      "r152"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).",
        "label": "Held To Maturity Securities Accumulated Unrecognized Holding Gain",
        "terseLabel": "Held-to-maturity, Gross Unrealized Gains"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss": {
     "auth_ref": [
      "r153"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).",
        "label": "Held To Maturity Securities Accumulated Unrecognized Holding Loss",
        "negatedLabel": "Held-to-maturity, Gross Unrealized Losses"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesClassifiedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Held To Maturity Securities Classified [Abstract]",
        "terseLabel": "Held-to-maturity debt securities:"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesClassifiedAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_HeldToMaturitySecuritiesFairValue",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value",
        "terseLabel": "Total held-to-maturity debt securities, Fair Value, Less than one year"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10060.0,
       "parentTag": "us-gaap_HeldToMaturitySecuritiesFairValue",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing after tenth rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value",
        "terseLabel": "Total held-to-maturity debt securities, Fair Value, Over 10 years"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_HeldToMaturitySecuritiesFairValue",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in sixth through tenth rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value",
        "terseLabel": "Total held-to-maturity debt securities, Fair Value, 5-10 years"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_HeldToMaturitySecuritiesFairValue",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value",
        "terseLabel": "Total held-to-maturity debt securities, Fair Value, 1-5 years"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldToMaturitySecuritiesFairValue": {
     "auth_ref": [
      "r151"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_InvestmentsFairValueDisclosure",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10060.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at amortized cost (held-to-maturity).",
        "label": "Held To Maturity Securities Fair Value",
        "terseLabel": "Held-to-maturity securities, fair values",
        "totalLabel": "Total held-to-maturity debt securities, Fair Value",
        "verboseLabel": "Held-to-maturity securities, Fair value"
       }
      }
     },
     "localname": "HeldToMaturitySecuritiesFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10130.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost",
        "terseLabel": "Total held-to-maturity debt securities, Amortized Cost, Less than one year"
       }
      }
     },
     "localname": "HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10160.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing after rolling tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost",
        "terseLabel": "Total held-to-maturity debt securities, Amortized Cost, Over 10 years"
       }
      }
     },
     "localname": "HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10150.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in sixth through tenth rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost",
        "terseLabel": "Total held-to-maturity debt securities, Amortized Cost, 5-10 years"
       }
      }
     },
     "localname": "HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": 10140.0,
       "parentTag": "us-gaap_HeldToMaturitySecurities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.",
        "label": "Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost",
        "terseLabel": "Total held-to-maturity debt securities, Amortized Cost, 1-5 years"
       }
      }
     },
     "localname": "HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HomeEquityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Revolving, open-end loan extended under a line of credit and secured by the borrower's residential property.",
        "label": "Home Equity [Member]",
        "terseLabel": "Home Equity [Member]"
       }
      }
     },
     "localname": "HomeEquityMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment": {
     "auth_ref": [
      "r116",
      "r119"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.",
        "label": "Impaired Financing Receivable Average Recorded Investment",
        "terseLabel": "Total impaired loans, Average recorded investment"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableAverageRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod": {
     "auth_ref": [
      "r117"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.",
        "label": "Impaired Financing Receivable Interest Income Accrual Method",
        "terseLabel": "Total impaired loans, Interest income recognized"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableInterestIncomeAccrualMethod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableRecordedInvestment": {
     "auth_ref": [
      "r113"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.",
        "label": "Impaired Financing Receivable Recorded Investment",
        "terseLabel": "Total impaired loans, Recorded investment"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableRelatedAllowance": {
     "auth_ref": [
      "r114"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit losses related to recorded investment.",
        "label": "Impaired Financing Receivable Related Allowance",
        "terseLabel": "Total impaired loans, Related Allowance"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableRelatedAllowance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance": {
     "auth_ref": [
      "r115"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.",
        "label": "Impaired Financing Receivable Unpaid Principal Balance",
        "terseLabel": "Total impaired loans, Unpaid principal balance"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableUnpaidPrincipalBalance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment": {
     "auth_ref": [
      "r116",
      "r119"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.",
        "label": "Impaired Financing Receivable With No Related Allowance Average Recorded Investment",
        "terseLabel": "Average recorded investment, with no related specific allowance"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod": {
     "auth_ref": [
      "r117"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.",
        "label": "Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method",
        "terseLabel": "Interest income recognized, With no related specific allowance"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment": {
     "auth_ref": [
      "r113"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.",
        "label": "Impaired Financing Receivable With No Related Allowance Recorded Investment",
        "terseLabel": "Recorded Investment, With no specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance": {
     "auth_ref": [
      "r115"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.",
        "label": "Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance",
        "terseLabel": "Unpaid Principal Balance, With no specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment": {
     "auth_ref": [
      "r116",
      "r119"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.",
        "label": "Impaired Financing Receivable With Related Allowance Average Recorded Investment",
        "terseLabel": "Average recorded investment, With a specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod": {
     "auth_ref": [
      "r117"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.",
        "label": "Impaired Financing Receivable With Related Allowance Interest Income Accrual Method",
        "terseLabel": "Interest income recognized, With a specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment": {
     "auth_ref": [
      "r113"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.",
        "label": "Impaired Financing Receivable With Related Allowance Recorded Investment",
        "terseLabel": "Recorded Investment, With a specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance": {
     "auth_ref": [
      "r115"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.",
        "label": "Impaired Financing Receivable With Related Allowance Unpaid Principal Balance",
        "terseLabel": "Unpaid Principal Balance, With a specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ImpairedFinancingReceivablesTableTextBlock": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of impaired financing receivables.",
        "label": "Impaired Financing Receivables Table [Text Block]",
        "terseLabel": "Summary of Impaired Loans"
       }
      }
     },
     "localname": "ImpairedFinancingReceivablesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r41",
      "r82",
      "r318",
      "r339",
      "r376"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10010.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.",
        "label": "Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest",
        "terseLabel": "Income before provision for income taxes",
        "totalLabel": "Income before provision for income taxes"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r191"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by location in the income statement.",
        "label": "Income Statement Location [Axis]",
        "terseLabel": "Income Statement Location"
       }
      }
     },
     "localname": "IncomeStatementLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Location in the income statement.",
        "label": "Income Statement Location [Domain]",
        "terseLabel": "Income Statement Location"
       }
      }
     },
     "localname": "IncomeStatementLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r78",
      "r97",
      "r235"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10020.0,
       "parentTag": "us-gaap_NetIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Income Tax Expense Benefit",
        "terseLabel": "Provision for income taxes"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaid": {
     "auth_ref": [
      "r65",
      "r73"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.",
        "label": "Income Taxes Paid",
        "terseLabel": "Income taxes paid"
       }
      }
     },
     "localname": "IncomeTaxesPaid",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInDeposits": {
     "auth_ref": [
      "r71",
      "r357"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10040.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash inflow or outflow for the increase (decrease) in the beginning and end of period deposits balances.",
        "label": "Increase Decrease In Deposits",
        "terseLabel": "Decrease in deposits"
       }
      }
     },
     "localname": "IncreaseDecreaseInDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncreaseDecreaseInFederalFundsPurchased": {
     "auth_ref": [
      "r71",
      "r72"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10090.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash inflow or outflow from the fund borrowed from other financial institution arising from the insufficient reserve deposited at Federal Reserve Bank to meet legal requirement. This borrowing is usually contracted on an overnight basis at an agreed rate of interest.",
        "label": "Increase Decrease In Federal Funds Purchased",
        "negatedLabel": "Increase (decrease) in federal funds purchased"
       }
      }
     },
     "localname": "IncreaseDecreaseInFederalFundsPurchased",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants": {
     "auth_ref": [
      "r90"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.",
        "label": "Incremental Common Shares Attributable To Call Options And Warrants",
        "terseLabel": "Effect of dilutive stock options and other stock compensation"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToCallOptionsAndWarrants",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares": {
     "auth_ref": [
      "r86",
      "r87",
      "r92"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares.  Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.",
        "label": "Incremental Common Shares Attributable To Contingently Issuable Shares",
        "terseLabel": "Shares contingently issuable under shareholder return plan"
       }
      }
     },
     "localname": "IncrementalCommonSharesAttributableToContingentlyIssuableShares",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_IntangibleAssetsNetIncludingGoodwill": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10280.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.",
        "label": "Intangible Assets Net Including Goodwill",
        "terseLabel": "Goodwill and other intangible assets, net"
       }
      }
     },
     "localname": "IntangibleAssetsNetIncludingGoodwill",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestAndDividendIncomeOperating": {
     "auth_ref": [
      "r343"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10260.0,
       "parentTag": "us-gaap_InterestIncomeExpenseNet",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.",
        "label": "Interest And Dividend Income Operating",
        "terseLabel": "Interest and dividend income",
        "totalLabel": "Total interest and dividend income"
       }
      }
     },
     "localname": "InterestAndDividendIncomeOperating",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestAndDividendIncomeOperatingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Interest And Dividend Income Operating [Abstract]",
        "terseLabel": "INTEREST AND DIVIDEND INCOME"
       }
      }
     },
     "localname": "InterestAndDividendIncomeOperatingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InterestAndDividendIncomeSecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10370.0,
       "parentTag": "us-gaap_InterestAndDividendIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating dividend and interest income, including amortization and accretion of premiums and discounts, on securities.",
        "label": "Interest And Dividend Income Securities",
        "negatedLabel": "Interest and dividends on securities (Interest and dividend income)",
        "totalLabel": "Total interest and dividends on securities"
       }
      }
     },
     "localname": "InterestAndDividendIncomeSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Interest And Dividend Income Securities By Taxable Status [Abstract]",
        "terseLabel": "Interest and dividends on securities:"
       }
      }
     },
     "localname": "InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InterestAndFeeIncomeLoansAndLeases": {
     "auth_ref": [
      "r342"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10360.0,
       "parentTag": "us-gaap_InterestAndDividendIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.",
        "label": "Interest And Fee Income Loans And Leases",
        "terseLabel": "Loans, including fees"
       }
      }
     },
     "localname": "InterestAndFeeIncomeLoansAndLeases",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestBearingDepositsInBanks": {
     "auth_ref": [
      "r320",
      "r333"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.",
        "label": "Interest Bearing Deposits In Banks",
        "terseLabel": "Interest bearing deposits, banks"
       }
      }
     },
     "localname": "InterestBearingDepositsInBanks",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpense": {
     "auth_ref": [
      "r40",
      "r96",
      "r294",
      "r295",
      "r356"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10270.0,
       "parentTag": "us-gaap_InterestIncomeExpenseNet",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.",
        "label": "Interest Expense",
        "terseLabel": "Interest expense",
        "totalLabel": "Total interest expense"
       }
      }
     },
     "localname": "InterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Interest Expense [Abstract]",
        "terseLabel": "INTEREST EXPENSE"
       }
      }
     },
     "localname": "InterestExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InterestExpenseDemandDepositAccounts": {
     "auth_ref": [
      "r353"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10320.0,
       "parentTag": "us-gaap_InterestExpenseDeposits",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest expense incurred on demand deposit accounts that represent borrowings rather than outstanding drafts.",
        "label": "Interest Expense Demand Deposit Accounts",
        "terseLabel": "Interest bearing demand deposits"
       }
      }
     },
     "localname": "InterestExpenseDemandDepositAccounts",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseDeposits": {
     "auth_ref": [
      "r353"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10280.0,
       "parentTag": "us-gaap_InterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate amount of interest expense on all deposits.",
        "label": "Interest Expense Deposits",
        "totalLabel": "Total interest expense on deposits"
       }
      }
     },
     "localname": "InterestExpenseDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10290.0,
       "parentTag": "us-gaap_InterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest expense incurred during the reporting period on long-term borrowings associated with Federal Home Loan Bank and Federal Reserve Bank advances.",
        "label": "Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term",
        "terseLabel": "Federal Home Loan Bank borrowings"
       }
      }
     },
     "localname": "InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseJuniorSubordinatedDebentures": {
     "auth_ref": [
      "r355"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10310.0,
       "parentTag": "us-gaap_InterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest expense incurred during the reporting period on junior subordinated debentures. Includes amortization of expenses incurred in the issuance of subordinated notes and debentures.",
        "label": "Interest Expense Junior Subordinated Debentures",
        "terseLabel": "Subordinated debt and junior subordinated debt"
       }
      }
     },
     "localname": "InterestExpenseJuniorSubordinatedDebentures",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseMoneyMarketDeposits": {
     "auth_ref": [
      "r353"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10330.0,
       "parentTag": "us-gaap_InterestExpenseDeposits",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest expense incurred on all money market deposits.",
        "label": "Interest Expense Money Market Deposits",
        "terseLabel": "Money market deposits"
       }
      }
     },
     "localname": "InterestExpenseMoneyMarketDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseSavingsDeposits": {
     "auth_ref": [
      "r353"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10340.0,
       "parentTag": "us-gaap_InterestExpenseDeposits",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest expense incurred on all savings account deposits.",
        "label": "Interest Expense Savings Deposits",
        "terseLabel": "Savings deposits"
       }
      }
     },
     "localname": "InterestExpenseSavingsDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseShortTermBorrowings": {
     "auth_ref": [
      "r354"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10300.0,
       "parentTag": "us-gaap_InterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate interest expense incurred on short-term borrowings including commercial paper and Federal funds purchased and securities sold under agreements to repurchase.",
        "label": "Interest Expense Short Term Borrowings",
        "terseLabel": "Other short-term borrowings"
       }
      }
     },
     "localname": "InterestExpenseShortTermBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestExpenseTimeDeposits": {
     "auth_ref": [
      "r353"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10350.0,
       "parentTag": "us-gaap_InterestExpenseDeposits",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate interest expense incurred on time deposits, including certificates of deposits, in domestic offices.",
        "label": "Interest Expense Time Deposits",
        "terseLabel": "Certificates of deposit"
       }
      }
     },
     "localname": "InterestExpenseTimeDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss": {
     "auth_ref": [
      "r346"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10030.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses.",
        "label": "Interest Income Expense After Provision For Loan Loss",
        "terseLabel": "Net interest income after provision for credit losses",
        "totalLabel": "Net interest income after provision for credit losses"
       }
      }
     },
     "localname": "InterestIncomeExpenseAfterProvisionForLoanLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeExpenseNet": {
     "auth_ref": [
      "r344"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10240.0,
       "parentTag": "us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net amount of operating interest income (expense).",
        "label": "Interest Income Expense Net",
        "terseLabel": "Net interest income",
        "totalLabel": "NET INTEREST INCOME"
       }
      }
     },
     "localname": "InterestIncomeExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeSecuritiesTaxExempt": {
     "auth_ref": [
      "r351"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10400.0,
       "parentTag": "us-gaap_InterestAndDividendIncomeSecurities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities exempt from state, federal and other income tax.",
        "label": "Interest Income Securities Tax Exempt",
        "terseLabel": "Tax-exempt"
       }
      }
     },
     "localname": "InterestIncomeSecuritiesTaxExempt",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestIncomeSecuritiesTaxable": {
     "auth_ref": [
      "r351"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10390.0,
       "parentTag": "us-gaap_InterestAndDividendIncomeSecurities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities subject to state, federal and other income tax.",
        "label": "Interest Income Securities Taxable",
        "terseLabel": "Taxable"
       }
      }
     },
     "localname": "InterestIncomeSecuritiesTaxable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r61",
      "r64",
      "r73"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.",
        "label": "Interest Paid Net",
        "terseLabel": "Interest paid on deposits and other borrowings"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPayableCurrentAndNoncurrent": {
     "auth_ref": [
      "r331",
      "r371"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10120.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest payable on debt, including, but not limited to, trade payables.",
        "label": "Interest Payable Current And Noncurrent",
        "terseLabel": "Accrued interest payable"
       }
      }
     },
     "localname": "InterestPayableCurrentAndNoncurrent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestRateDerivativeAssetsAtFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.",
        "label": "Interest Rate Derivative Assets At Fair Value",
        "terseLabel": "Other assets - interest rate derivatives",
        "verboseLabel": "Other assets - interest rate derivatives agreements"
       }
      }
     },
     "localname": "InterestRateDerivativeAssetsAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestRateDerivativeLiabilitiesAtFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.",
        "label": "Interest Rate Derivative Liabilities At Fair Value",
        "terseLabel": "Other liabilities - interest rate derivatives",
        "verboseLabel": "Other liabilities - interest rate derivatives agreements"
       }
      }
     },
     "localname": "InterestRateDerivativeLiabilitiesAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestRateSwapMember": {
     "auth_ref": [
      "r265"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.",
        "label": "Interest Rate Swap [Member]",
        "terseLabel": "Interest Rate Swaps [Member]"
       }
      }
     },
     "localname": "InterestRateSwapMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestReceivable": {
     "auth_ref": [
      "r21"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10270.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.",
        "label": "Interest Receivable",
        "terseLabel": "Accrued interest receivable"
       }
      }
     },
     "localname": "InterestReceivable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InternalCreditAssessmentAxis": {
     "auth_ref": [
      "r120",
      "r167",
      "r171",
      "r172",
      "r197",
      "r271"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by entity-defined rating.",
        "label": "Internal Credit Assessment [Axis]",
        "terseLabel": "Internal Credit Assessment"
       }
      }
     },
     "localname": "InternalCreditAssessmentAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InternalCreditAssessmentDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Entity defined credit risk rating.",
        "label": "Internal Credit Assessment [Domain]",
        "terseLabel": "Internal Credit Assessment"
       }
      }
     },
     "localname": "InternalCreditAssessmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation": {
     "auth_ref": [
      "r381"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10010.0,
       "parentTag": "wsbc_SecuritiesAmortizedCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the excess of the cost (face amount, notional amount) of an investment (security, contract) over its fair value which deficiency has not been recognized in earnings of the entity.",
        "label": "Investment Owned Unrecognized Unrealized Appreciation",
        "terseLabel": "Total securities, Gross Unrealized Gains"
       }
      }
     },
     "localname": "InvestmentOwnedUnrecognizedUnrealizedAppreciation",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation": {
     "auth_ref": [
      "r381"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10020.0,
       "parentTag": "wsbc_SecuritiesAmortizedCost",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the excess of the cost (face amount, notional amount) of an investment (security, contract) over its fair value which deficiency has not been recognized in earnings of the entity.",
        "label": "Investment Owned Unrecognized Unrealized Depreciation",
        "negatedLabel": "Total securities, Gross Unrealized Losses"
       }
      }
     },
     "localname": "InvestmentOwnedUnrecognizedUnrealizedDepreciation",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.",
        "label": "Investments Classified By Contractual Maturity Date Table [Text Block]",
        "terseLabel": "Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity"
       }
      }
     },
     "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Investments Debt And Equity Securities [Abstract]"
       }
      }
     },
     "localname": "InvestmentsDebtAndEquitySecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsFairValueDisclosure": {
     "auth_ref": [
      "r275"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": 10030.0,
       "parentTag": "wsbc_SecuritiesAmortizedCost",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.",
        "label": "Investments Fair Value Disclosure",
        "terseLabel": "Total securities, Estimated Fair Value",
        "totalLabel": "Total debt securities, Fair Value"
       }
      }
     },
     "localname": "InvestmentsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r156",
      "r319",
      "r359",
      "r383"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for  investments in certain debt and equity securities.",
        "label": "Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block]",
        "terseLabel": "Securities"
       }
      }
     },
     "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecurities"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LeasesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Leases [Abstract]"
       }
      }
     },
     "localname": "LeasesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail2": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease.",
        "label": "Lessee Operating Lease Liability Payments Due",
        "totalLabel": "Total lease payments",
        "verboseLabel": "Total lease payments"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail": {
       "order": 10050.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.",
        "label": "Lessee Operating Lease Liability Payments Due After Year Five",
        "terseLabel": "2024 and thereafter"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next fiscal year following latest fiscal year.",
        "label": "Lessee Operating Lease Liability Payments Due Next Twelve Months",
        "terseLabel": "2020"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail": {
       "order": 10040.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.",
        "label": "Lessee Operating Lease Liability Payments Due Year Four",
        "terseLabel": "2023"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.",
        "label": "Lessee Operating Lease Liability Payments Due Year Three",
        "terseLabel": "2022"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.",
        "label": "Lessee Operating Lease Liability Payments Due Year Two",
        "terseLabel": "2021"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": {
     "auth_ref": [
      "r306"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail2": {
       "order": 10010.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.",
        "label": "Lessee Operating Lease Liability Undiscounted Excess Amount",
        "negatedLabel": "Less: Interest"
       }
      }
     },
     "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LesseeOperatingLeaseRenewalTerm": {
     "auth_ref": [
      "r302"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Lessee Operating Lease Renewal Term",
        "terseLabel": "Operating lease term extensions"
       }
      }
     },
     "localname": "LesseeOperatingLeaseRenewalTerm",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_LesseeOperatingLeasesTextBlock": {
     "auth_ref": [
      "r308"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.",
        "label": "Lessee Operating Leases [Text Block]",
        "terseLabel": "Leases"
       }
      }
     },
     "localname": "LesseeOperatingLeasesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeases"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LessorOperatingLeaseTermOfContract": {
     "auth_ref": [
      "r309"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Lessor Operating Lease Term Of Contract",
        "terseLabel": "Operating lease terms"
       }
      }
     },
     "localname": "LessorOperatingLeaseTermOfContract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_LettersOfCreditOutstandingAmount": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.",
        "label": "Letters Of Credit Outstanding Amount",
        "terseLabel": "Letters of credit"
       }
      }
     },
     "localname": "LettersOfCreditOutstandingAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesCommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r17"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10010.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
        "label": "Liabilities",
        "totalLabel": "Total Liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities [Abstract]",
        "terseLabel": "LIABILITIES"
       }
      }
     },
     "localname": "LiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r14",
      "r323",
      "r369"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.",
        "label": "Liabilities And Stockholders Equity",
        "totalLabel": "Total Liabilities and Shareholders' Equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesFairValueDisclosure": {
     "auth_ref": [
      "r275"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial and nonfinancial obligations.",
        "label": "Liabilities Fair Value Disclosure",
        "terseLabel": "Total liabilities recurring fair value measurements"
       }
      }
     },
     "localname": "LiabilitiesFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansAndLeasesReceivableAllowance": {
     "auth_ref": [
      "r106",
      "r110",
      "r131",
      "r138",
      "r336"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10320.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetReportedAmount",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.",
        "label": "Loans And Leases Receivable Allowance",
        "negatedLabel": "Allowance for loan losses",
        "periodEndLabel": "Allowance for loan losses, ending balance",
        "periodStartLabel": "Allowance for loan losses, beginning balance"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableAllowance",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansAndLeasesReceivableDeferredIncome": {
     "auth_ref": [
      "r125",
      "r133",
      "r298",
      "r337"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.",
        "label": "Loans And Leases Receivable Deferred Income",
        "terseLabel": "Net Deferred loan (costs) and fees"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableDeferredIncome",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansAndLeasesReceivableGrossCarryingAmount": {
     "auth_ref": [
      "r103"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.",
        "label": "Loans And Leases Receivable Gross Carrying Amount",
        "terseLabel": "Portfolio loans, net of unearned income"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableGrossCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend": {
     "auth_ref": [
      "r140"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.",
        "label": "Loans And Leases Receivable Impaired Commitment To Lend",
        "terseLabel": "Unfunded commitments to debtors for impaired loans"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableImpairedCommitmentToLend",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome": {
     "auth_ref": [
      "r103",
      "r125"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_NotesReceivableNet",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10310.0,
       "parentTag": "us-gaap_LoansAndLeasesReceivableNetReportedAmount",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.",
        "label": "Loans And Leases Receivable Net Of Deferred Income",
        "terseLabel": "Portfolio loans, net of unearned income",
        "totalLabel": "Total loans",
        "verboseLabel": "Total portfolio loans"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableNetOfDeferredIncome",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansAndLeasesReceivableNetReportedAmount": {
     "auth_ref": [
      "r103",
      "r337"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10250.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.",
        "label": "Loans And Leases Receivable Net Reported Amount",
        "terseLabel": "Commercial loans",
        "totalLabel": "Net portfolio loans",
        "verboseLabel": "Net loans"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableNetReportedAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansHeldForSaleFairValueDisclosure": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_NotesReceivableNet",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10240.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.",
        "label": "Loans Held For Sale Fair Value Disclosure",
        "terseLabel": "Loans held for sale"
       }
      }
     },
     "localname": "LoansHeldForSaleFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock": {
     "auth_ref": [
      "r132"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.",
        "label": "Loans Notes Trade And Other Receivables Disclosure [Text Block]",
        "terseLabel": "Loans and the Allowance for Credit Losses"
       }
      }
     },
     "localname": "LoansNotesTradeAndOtherReceivablesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLosses"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LoansReceivableHeldForSaleAmount": {
     "auth_ref": [
      "r103"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The face amount of loans that will be sold to other entities.",
        "label": "Loans Receivable Held For Sale Amount",
        "terseLabel": "Loans held for sale, current"
       }
      }
     },
     "localname": "LoansReceivableHeldForSaleAmount",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MarketableSecurities": {
     "auth_ref": [
      "r334"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10230.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in marketable security.",
        "label": "Marketable Securities",
        "totalLabel": "Total securities"
       }
      }
     },
     "localname": "MarketableSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MarketableSecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Marketable Securities [Abstract]",
        "terseLabel": "Securities:"
       }
      }
     },
     "localname": "MarketableSecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MarketableSecuritiesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.",
        "label": "Marketable Securities [Text Block]",
        "terseLabel": "Schedule of Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities"
       }
      }
     },
     "localname": "MarketableSecuritiesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_MarketingExpense": {
     "auth_ref": [
      "r46"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10100.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services. Costs of public relations and corporate promotions are typically considered to be marketing costs.",
        "label": "Marketing Expense",
        "terseLabel": "Marketing"
       }
      }
     },
     "localname": "MarketingExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember": {
     "auth_ref": [
      "r211"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt securities collateralized by real estate mortgage loans (mortgages), issued by US Government Sponsored Enterprises, such as Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac).",
        "label": "Mortgage Backed Securities Issued By U S Government Sponsored Enterprises [Member]",
        "terseLabel": "Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]"
       }
      }
     },
     "localname": "MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r63"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10030.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "Net Cash Provided By Used In Financing Activities",
        "totalLabel": "Net cash (used in) provided by financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided By Used In Financing Activities [Abstract]",
        "terseLabel": "FINANCING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r63"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10020.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.",
        "label": "Net Cash Provided By Used In Investing Activities",
        "totalLabel": "Net cash provided by (used in) investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided By Used In Investing Activities [Abstract]",
        "terseLabel": "INVESTING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r63",
      "r66",
      "r69"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10010.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "Net Cash Provided By Used In Operating Activities",
        "terseLabel": "NET CASH PROVIDED BY OPERATING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided By Used In Operating Activities [Abstract]",
        "terseLabel": "OPERATING ACTIVITIES"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetIncomeLoss": {
     "auth_ref": [
      "r32",
      "r35",
      "r42",
      "r69",
      "r92",
      "r340",
      "r373"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity": {
       "order": 10010.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.",
        "label": "Net Income Loss",
        "terseLabel": "Net income",
        "totalLabel": "NET INCOME"
       }
      }
     },
     "localname": "NetIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Income Loss [Abstract]",
        "terseLabel": "Numerator for both basic and diluted earnings per common share:"
       }
      }
     },
     "localname": "NetIncomeLossAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.",
        "label": "New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification",
        "terseLabel": "Adoption of accounting standard ASU 2016-01"
       }
      }
     },
     "localname": "NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.",
        "label": "New Accounting Pronouncements Policy Policy [Text Block]",
        "terseLabel": "Recent accounting pronouncements"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoninterestBearingDepositLiabilities": {
     "auth_ref": [
      "r329"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10170.0,
       "parentTag": "us-gaap_Deposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.",
        "label": "Noninterest Bearing Deposit Liabilities",
        "terseLabel": "Non-interest bearing demand"
       }
      }
     },
     "localname": "NoninterestBearingDepositLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoninterestExpense": {
     "auth_ref": [
      "r350"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10050.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total aggregate amount of all noninterest expense.",
        "label": "Noninterest Expense",
        "terseLabel": "Non-interest expense",
        "totalLabel": "Total non-interest expense"
       }
      }
     },
     "localname": "NoninterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoninterestExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Noninterest Expense [Abstract]",
        "terseLabel": "NON-INTEREST EXPENSE"
       }
      }
     },
     "localname": "NoninterestExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NoninterestIncome": {
     "auth_ref": [
      "r348"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10040.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.",
        "label": "Noninterest Income",
        "terseLabel": "Non-interest income",
        "totalLabel": "Total non-interest income"
       }
      }
     },
     "localname": "NoninterestIncome",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NoninterestIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Noninterest Income [Abstract]",
        "terseLabel": "NON-INTEREST INCOME"
       }
      }
     },
     "localname": "NoninterestIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NoninterestIncomeOtherOperatingIncome": {
     "auth_ref": [
      "r39",
      "r338",
      "r375"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10230.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of revenue earned, classified as other, excluding interest income.",
        "label": "Noninterest Income Other Operating Income",
        "terseLabel": "Other income"
       }
      }
     },
     "localname": "NoninterestIncomeOtherOperatingIncome",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NotesReceivableNet": {
     "auth_ref": [
      "r9",
      "r103",
      "r166"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.",
        "label": "Notes Receivable Net",
        "terseLabel": "Total loans",
        "totalLabel": "Total loans"
       }
      }
     },
     "localname": "NotesReceivableNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NumberOfInterestRateDerivativesHeld": {
     "auth_ref": [
      "r255",
      "r256"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of interest rate derivative instruments held by the entity at the reporting date.",
        "label": "Number Of Interest Rate Derivatives Held",
        "terseLabel": "Number of interest rate swaps"
       }
      }
     },
     "localname": "NumberOfInterestRateDerivativesHeld",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_NumberOfOperatingSegments": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.",
        "label": "Number Of Operating Segments",
        "terseLabel": "Operating segments"
       }
      }
     },
     "localname": "NumberOfOperatingSegments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_OccupancyNet": {
     "auth_ref": [
      "r47",
      "r297",
      "r349"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10080.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense.",
        "label": "Occupancy Net",
        "terseLabel": "Net occupancy"
       }
      }
     },
     "localname": "OccupancyNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseExpense": {
     "auth_ref": [
      "r301"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating lease expense. Excludes sublease income.",
        "label": "Operating Lease Expense",
        "terseLabel": "Operating lease, expense"
       }
      }
     },
     "localname": "OperatingLeaseExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLiability": {
     "auth_ref": [
      "r300"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail2": {
       "order": 10020.0,
       "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.",
        "label": "Operating Lease Liability",
        "terseLabel": "Operating lease ROU liabilities",
        "verboseLabel": "Present value of lease liabilities"
       }
      }
     },
     "localname": "OperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsUnderNonCancellableLeasesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseRightOfUseAsset": {
     "auth_ref": [
      "r299"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of lessee's right to use underlying asset under operating lease.",
        "label": "Operating Lease Right Of Use Asset",
        "terseLabel": "Operating lease ROU assets"
       }
      }
     },
     "localname": "OperatingLeaseRightOfUseAsset",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": {
     "auth_ref": [
      "r305",
      "r307"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average discount rate for operating lease calculated at point in time.",
        "label": "Operating Lease Weighted Average Discount Rate Percent",
        "terseLabel": "Weighted average discount rate"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageDiscountRatePercent",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": {
     "auth_ref": [
      "r304",
      "r307"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.",
        "label": "Operating Lease Weighted Average Remaining Lease Term1",
        "terseLabel": "Weighted-average lease term"
       }
      }
     },
     "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_OtherAssets": {
     "auth_ref": [
      "r5",
      "r321",
      "r366"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10300.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of assets classified as other.",
        "label": "Other Assets",
        "terseLabel": "Other assets"
       }
      }
     },
     "localname": "OtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": {
     "auth_ref": [
      "r30",
      "r38"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax, before reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income Loss Before Reclassifications Net Of Tax",
        "terseLabel": "Other comprehensive income/(loss) before reclassifications"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r33",
      "r36",
      "r38",
      "r199"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      },
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity": {
       "order": 10020.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income Loss Net Of Tax",
        "terseLabel": "Other Comprehensive Income (Loss)",
        "totalLabel": "Total other comprehensive (loss) gain"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax": {
     "auth_ref": [
      "r26",
      "r28"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax",
        "terseLabel": "Acquired FFKT Medical benefit plan"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherContractMember": {
     "auth_ref": [
      "r211",
      "r266"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument whose primary underlying risk is classified as other.",
        "label": "Other Contract [Member]",
        "terseLabel": "Other Contract [Member]"
       }
      }
     },
     "localname": "OtherContractMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherForeclosedAssets": {
     "auth_ref": [
      "r104",
      "r105"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_OtherRealEstateAndForeclosedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of assets other than real property that were received in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance.",
        "label": "Other Foreclosed Assets",
        "terseLabel": "Repossessed assets"
       }
      }
     },
     "localname": "OtherForeclosedAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherIncomeMember": {
     "auth_ref": [
      "r269"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing other revenue.",
        "label": "Other Income [Member]",
        "terseLabel": "Other Income [Member]"
       }
      }
     },
     "localname": "OtherIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherInterestAndDividendIncome": {
     "auth_ref": [
      "r352"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10380.0,
       "parentTag": "us-gaap_InterestAndDividendIncomeOperating",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after discount, accretion and premium amortization, of interest income and dividend income classified as other.",
        "label": "Other Interest And Dividend Income",
        "terseLabel": "Other interest income"
       }
      }
     },
     "localname": "OtherInterestAndDividendIncome",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilities": {
     "auth_ref": [
      "r332"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10130.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities classified as other.",
        "label": "Other Liabilities",
        "terseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherNoninterestExpense": {
     "auth_ref": [
      "r350"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10140.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of noninterest expense classified as other.",
        "label": "Other Noninterest Expense",
        "terseLabel": "Other operating expenses"
       }
      }
     },
     "localname": "OtherNoninterestExpense",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherRealEstateAndForeclosedAssets": {
     "auth_ref": [
      "r327"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.",
        "label": "Other Real Estate And Foreclosed Assets",
        "terseLabel": "Other real estate owned and repossessed assets",
        "totalLabel": "Total other real estate owned and repossessed assets"
       }
      }
     },
     "localname": "OtherRealEstateAndForeclosedAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherShortTermBorrowings": {
     "auth_ref": [
      "r16"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10150.0,
       "parentTag": "us-gaap_DebtAndCapitalLeaseObligations",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of borrowings classified as other, maturing within one year or the normal operating cycle, if longer.",
        "label": "Other Short Term Borrowings",
        "terseLabel": "Other short-term borrowings",
        "verboseLabel": "Other borrowings"
       }
      }
     },
     "localname": "OtherShortTermBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PassMember": {
     "auth_ref": [
      "r120",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A category of financing receivables not considered to be special mention, substandard, doubtful, and loss receivables.",
        "label": "Pass [Member]",
        "terseLabel": "Pass [Member]"
       }
      }
     },
     "localname": "PassMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PastDueFinancingReceivablesTableTextBlock": {
     "auth_ref": [
      "r128",
      "r129",
      "r162",
      "r173"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of aging analysis for financing receivable.",
        "label": "Past Due Financing Receivables Table [Text Block]",
        "terseLabel": "Summary of Age Analysis of Loan Categories"
       }
      }
     },
     "localname": "PastDueFinancingReceivablesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PaymentsForProceedsFromLoansAndLeases": {
     "auth_ref": [
      "r79"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10140.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash outflow or inflow for the increase (decrease) in the beginning and end of period of loan and lease balances which are not originated or purchased specifically for resale. Includes cash payments and proceeds associated with (a) loans held-for-investment, (b) leases held-for-investment, and (c) both.",
        "label": "Payments For Proceeds From Loans And Leases",
        "negatedLabel": "Net (increase) decrease in loans held for investment"
       }
      }
     },
     "localname": "PaymentsForProceedsFromLoansAndLeases",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDividendsCommonStock": {
     "auth_ref": [
      "r59"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10110.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.",
        "label": "Payments Of Dividends Common Stock",
        "negatedLabel": "Dividends paid to common shareholders"
       }
      }
     },
     "localname": "PaymentsOfDividendsCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireAvailableForSaleSecurities": {
     "auth_ref": [
      "r54",
      "r143"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10170.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.",
        "label": "Payments To Acquire Available For Sale Securities",
        "negatedLabel": "Purchases of securities"
       }
      }
     },
     "localname": "PaymentsToAcquireAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireBusinessesGross": {
     "auth_ref": [
      "r55",
      "r249"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": 10060.0,
       "parentTag": "us-gaap_BusinessCombinationConsiderationTransferred1",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.",
        "label": "Payments To Acquire Businesses Gross",
        "terseLabel": "Cash consideration for outstanding FFKT shares"
       }
      }
     },
     "localname": "PaymentsToAcquireBusinessesGross",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired": {
     "auth_ref": [
      "r55"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10230.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.",
        "label": "Payments To Acquire Businesses Net Of Cash Acquired",
        "negatedLabel": "Net cash received from acquisitions"
       }
      }
     },
     "localname": "PaymentsToAcquireBusinessesNetOfCashAcquired",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireHeldToMaturitySecurities": {
     "auth_ref": [
      "r53",
      "r143"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10190.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow through purchase of long-term held-to-maturity securities.",
        "label": "Payments To Acquire Held To Maturity Securities",
        "negatedLabel": "Purchases of securities"
       }
      }
     },
     "localname": "PaymentsToAcquireHeldToMaturitySecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": {
     "auth_ref": [
      "r56"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10220.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.",
        "label": "Payments To Acquire Property Plant And Equipment",
        "negatedLabel": "Purchases of premises and equipment \u2013 net"
       }
      }
     },
     "localname": "PaymentsToAcquirePropertyPlantAndEquipment",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": {
     "auth_ref": [
      "r228"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for pension and other postretirement benefits.",
        "label": "Pension And Other Postretirement Benefits Disclosure [Text Block]",
        "terseLabel": "Benefit Plans"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlans"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PledgedAssetsNotSeparatelyReportedOtherFinancialInstruments": {
     "auth_ref": [
      "r314"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying amount, as of the date of the latest financial statement presented, of other assets which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.",
        "label": "Pledged Assets Not Separately Reported Other Financial Instruments",
        "terseLabel": "Securities with aggregate fair values"
       }
      }
     },
     "localname": "PledgedAssetsNotSeparatelyReportedOtherFinancialInstruments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PortionAtFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r289"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measured at fair value for financial reporting purposes.",
        "label": "Portion At Fair Value Fair Value Disclosure [Member]",
        "terseLabel": "Fair Value Disclosure Item Amounts [Default]"
       }
      }
     },
     "localname": "PortionAtFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PreferredStockNoParValue": {
     "auth_ref": [
      "r7"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.",
        "label": "Preferred Stock No Par Value",
        "terseLabel": "Preferred stock, no par value"
       }
      }
     },
     "localname": "PreferredStockNoParValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_PreferredStockSharesAuthorized": {
     "auth_ref": [
      "r7"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.",
        "label": "Preferred Stock Shares Authorized",
        "terseLabel": "Preferred stock, shares authorized"
       }
      }
     },
     "localname": "PreferredStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockSharesOutstanding": {
     "auth_ref": [
      "r7"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.",
        "label": "Preferred Stock Shares Outstanding",
        "terseLabel": "Preferred stock, shares outstanding"
       }
      }
     },
     "localname": "PreferredStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_PreferredStockValue": {
     "auth_ref": [
      "r7"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10030.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Preferred Stock Value",
        "terseLabel": "Preferred stock, no par value; 1,000,000 shares authorized; none outstanding"
       }
      }
     },
     "localname": "PreferredStockValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromFederalHomeLoanBankBorrowings": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10050.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from Federal Home Loan Bank (FHLBank) borrowing, classified as financing activity.",
        "label": "Proceeds From Federal Home Loan Bank Borrowings",
        "terseLabel": "Proceeds from Federal Home Loan Bank borrowings"
       }
      }
     },
     "localname": "ProceedsFromFederalHomeLoanBankBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfCommonStock": {
     "auth_ref": [
      "r57"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10120.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from the additional capital contribution to the entity.",
        "label": "Proceeds From Issuance Of Common Stock",
        "terseLabel": "Issuance of common stock"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfCommonStock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLifeInsurancePolicies": {
     "auth_ref": [
      "r52",
      "r62"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10210.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy.",
        "label": "Proceeds From Life Insurance Policies",
        "terseLabel": "Proceeds from bank-owned life insurance"
       }
      }
     },
     "localname": "ProceedsFromLifeInsurancePolicies",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities": {
     "auth_ref": [
      "r49",
      "r50",
      "r143"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10160.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities",
        "terseLabel": "Proceeds from maturities, prepayments and calls"
       }
      }
     },
     "localname": "ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities": {
     "auth_ref": [
      "r50",
      "r143"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10180.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity.",
        "label": "Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities",
        "terseLabel": "Proceeds from maturities, prepayments and calls"
       }
      }
     },
     "localname": "ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromOtherShortTermDebt": {
     "auth_ref": [
      "r58"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10070.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from short-term debt classified as other.",
        "label": "Proceeds From Other Short Term Debt",
        "terseLabel": "Increase in other short-term borrowings"
       }
      }
     },
     "localname": "ProceedsFromOtherShortTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities": {
     "auth_ref": [
      "r51",
      "r143"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10150.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.",
        "label": "Proceeds From Sale Of Available For Sale Securities",
        "terseLabel": "Proceeds from sales",
        "verboseLabel": "Proceeds from sale of available-for-sale securities"
       }
      }
     },
     "localname": "ProceedsFromSaleOfAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProductAndServiceOtherMember": {
     "auth_ref": [
      "r205"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Article or substance produced by nature, labor or machinery and act of providing assistance, classified as other.",
        "label": "Product And Service Other [Member]",
        "terseLabel": "Other Real Estate Owned and Other Assets [Member]"
       }
      }
     },
     "localname": "ProductAndServiceOtherMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PropertyPlantAndEquipmentNet": {
     "auth_ref": [
      "r3",
      "r4",
      "r190",
      "r370"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10260.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.",
        "label": "Property Plant And Equipment Net",
        "terseLabel": "Premises and equipment, net"
       }
      }
     },
     "localname": "PropertyPlantAndEquipmentNet",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProvisionForLoanAndLeaseLosses": {
     "auth_ref": [
      "r67",
      "r107",
      "r345"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense related to estimated loss from loan and lease transactions.",
        "label": "Provision For Loan And Lease Losses",
        "terseLabel": "Provision for loan losses"
       }
      }
     },
     "localname": "ProvisionForLoanAndLeaseLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProvisionForLoanLeaseAndOtherLosses": {
     "auth_ref": [
      "r67",
      "r107",
      "r345"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10250.0,
       "parentTag": "us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.",
        "label": "Provision For Loan Lease And Other Losses",
        "terseLabel": "Provision for credit losses",
        "verboseLabel": "Total provision for credit losses"
       }
      }
     },
     "localname": "ProvisionForLoanLeaseAndOtherLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateAcquiredThroughForeclosure": {
     "auth_ref": [
      "r104",
      "r105"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_OtherRealEstateAndForeclosedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.",
        "label": "Real Estate Acquired Through Foreclosure",
        "terseLabel": "Other real estate owned"
       }
      }
     },
     "localname": "RealEstateAcquiredThroughForeclosure",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfOtherRealEstateOwnedAndRepossessedAssetsDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateLoanMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Loan to finance the purchase of real estate, including but not limited to, land or building.",
        "label": "Real Estate Loan [Member]",
        "terseLabel": "Commercial Real Estate - Improved Property [Member]"
       }
      }
     },
     "localname": "RealEstateLoanMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RealizedInvestmentGainsLosses": {
     "auth_ref": [
      "r377"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": 10040.0,
       "parentTag": "us-gaap_GainLossOnSaleOfEquityInvestments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.",
        "label": "Realized Investment Gains Losses",
        "terseLabel": "Net realized gains (losses) recognized on securities sold"
       }
      }
     },
     "localname": "RealizedInvestmentGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReceivablesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Receivables [Abstract]"
       }
      }
     },
     "localname": "ReceivablesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]",
        "terseLabel": "Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]"
       }
      }
     },
     "localname": "ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax": {
     "auth_ref": [
      "r30",
      "r31",
      "r38"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail": {
       "order": 10030.0,
       "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss).",
        "label": "Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax",
        "terseLabel": "Amounts reclassified from accumulated other comprehensive income/(loss)",
        "verboseLabel": "Net effect on accumulated other comprehensive income/(loss) for the period"
       }
      }
     },
     "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by item reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification Out Of Accumulated Other Comprehensive Income [Axis]",
        "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Item reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification Out Of Accumulated Other Comprehensive Income [Domain]",
        "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identifies item reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification Out Of Accumulated Other Comprehensive Income [Member]",
        "terseLabel": "Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member]"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about items reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification Out Of Accumulated Other Comprehensive Income [Table]",
        "terseLabel": "Reclassification Out Of Accumulated Other Comprehensive Income [Table]"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification Out Of Accumulated Other Comprehensive Income Table [Text Block]",
        "terseLabel": "Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income/(Loss)"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10080.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow for short-term and long-term debt and lease obligation.",
        "label": "Repayments Of Debt And Capital Lease Obligations",
        "negatedLabel": "Principal repayments of finance lease obligations"
       }
      }
     },
     "localname": "RepaymentsOfDebtAndCapitalLeaseObligations",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings": {
     "auth_ref": [
      "r60"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10060.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow for repayment of Federal Home Loan Bank (FHLBank) borrowing, classified as financing activity.",
        "label": "Repayments Of Federal Home Loan Bank Borrowings",
        "negatedLabel": "Repayment of Federal Home Loan Bank borrowings"
       }
      }
     },
     "localname": "RepaymentsOfFederalHomeLoanBankBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfSubordinatedDebt": {
     "auth_ref": [
      "r60"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10100.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral.",
        "label": "Repayments Of Subordinated Debt",
        "negatedLabel": "Repayment of junior subordinated debt"
       }
      }
     },
     "localname": "RepaymentsOfSubordinatedDebt",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ResidentialPortfolioSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portfolio segment of the company's total financing receivables related to residential financing receivables.",
        "label": "Residential Portfolio Segment [Member]",
        "terseLabel": "Residential Real Estate [Member]"
       }
      }
     },
     "localname": "ResidentialPortfolioSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RestrictedStockMember": {
     "auth_ref": [
      "r91"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met.",
        "label": "Restricted Stock [Member]",
        "terseLabel": "Restricted Stock [Member]"
       }
      }
     },
     "localname": "RestrictedStockMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r11",
      "r200",
      "r368"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10060.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings Accumulated Deficit",
        "terseLabel": "Retained earnings"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Retained Earnings [Member]"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r203",
      "r204"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.",
        "label": "Revenue From Contract With Customer Excluding Assessed Tax",
        "terseLabel": "Annual sales of borrowers"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax": {
     "auth_ref": [
      "r203",
      "r204"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10150.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.",
        "label": "Revenue From Contract With Customer Including Assessed Tax",
        "terseLabel": "NON-INTEREST INCOME",
        "verboseLabel": "Total trust fees/Total service charges on deposits"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerIncludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenueRecognitionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revenue Recognition [Abstract]"
       }
      }
     },
     "localname": "RevenueRecognitionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": {
     "auth_ref": [
      "r303",
      "r307"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase in right-of-use asset obtained in exchange for operating lease liability.",
        "label": "Right Of Use Asset Obtained In Exchange For Operating Lease Liability",
        "terseLabel": "Right of use assets obtained in exchange for lease obligations"
       }
      }
     },
     "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock": {
     "auth_ref": [
      "r20"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.",
        "label": "Schedule Of Accounts Notes Loans And Financing Receivable [Text Block]",
        "terseLabel": "Schedule of Recorded Investment in Loans by Category"
       }
      }
     },
     "localname": "ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable": {
     "auth_ref": [
      "r238",
      "r239"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule reflecting each material business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.",
        "label": "Schedule Of Business Acquisitions By Acquisition [Table]",
        "terseLabel": "Schedule Of Business Acquisitions By Acquisition [Table]"
       }
      }
     },
     "localname": "ScheduleOfBusinessAcquisitionsByAcquisitionTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock": {
     "auth_ref": [
      "r24"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions  designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans.",
        "label": "Schedule Of Comprehensive Income Loss Table [Text Block]",
        "terseLabel": "Components of Accumulated Other Comprehensive Income"
       }
      }
     },
     "localname": "ScheduleOfComprehensiveIncomeLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock": {
     "auth_ref": [
      "r258",
      "r263",
      "r268"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.",
        "label": "Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]",
        "terseLabel": "Summary of Effect of Derivative Instruments on Income Statement"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock": {
     "auth_ref": [
      "r261"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.",
        "label": "Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]",
        "terseLabel": "Summary of Fair Values of Derivative Instruments on Balance Sheets"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": {
     "auth_ref": [
      "r92"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.",
        "label": "Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]",
        "terseLabel": "Summary of Earnings Per Common Share"
       }
      }
     },
     "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable": {
     "auth_ref": [
      "r161"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about allowance for credit loss on financing receivable.",
        "label": "Schedule Of Financing Receivable Allowance For Credit Losses [Table]",
        "terseLabel": "Schedule Of Financing Receivable Allowance For Credit Losses [Table]"
       }
      }
     },
     "localname": "ScheduleOfFinancingReceivableAllowanceForCreditLossesTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable": {
     "auth_ref": [
      "r167",
      "r172"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about credit quality indicator for financing receivable.",
        "label": "Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]",
        "terseLabel": "Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]"
       }
      }
     },
     "localname": "ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable": {
     "auth_ref": [
      "r122",
      "r124"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about financing receivable modified as troubled debt restructuring.",
        "label": "Schedule Of Financing Receivable Troubled Debt Restructurings [Table]",
        "terseLabel": "Schedule Of Financing Receivable Troubled Debt Restructurings [Table]"
       }
      }
     },
     "localname": "ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock": {
     "auth_ref": [
      "r296"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date.",
        "label": "Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block]",
        "terseLabel": "Future Minimum Lease Payments Under Non-cancellable Leases"
       }
      }
     },
     "localname": "ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfImpairedFinancingReceivableTable": {
     "auth_ref": [
      "r118"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of the recorded investment, unpaid principal balance, associated allowance, average recorded investment, accounting policies, and interest income recognized on the accrual and cash basis for impaired financing receivables by class of financing receivable.",
        "label": "Schedule Of Impaired Financing Receivable [Table]",
        "terseLabel": "Schedule Of Impaired Financing Receivable [Table]"
       }
      }
     },
     "localname": "ScheduleOfImpairedFinancingReceivableTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfRealizedGainLossTableTextBlock": {
     "auth_ref": [
      "r155"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.",
        "label": "Schedule Of Realized Gain Loss Table [Text Block]",
        "terseLabel": "Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities"
       }
      }
     },
     "localname": "ScheduleOfRealizedGainLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock": {
     "auth_ref": [
      "r243"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.",
        "label": "Schedule Of Recognized Identified Assets Acquired And Liabilities Assumed Table [Text Block]",
        "terseLabel": "Allocation of Purchase Price of Assets Acquired and Liabilities Assumed"
       }
      }
     },
     "localname": "ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable": {
     "auth_ref": [
      "r95",
      "r98",
      "r99",
      "r100",
      "r182"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A table disclosing the profit or loss and total assets for each reportable segment of the entity. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule Of Segment Reporting Information By Segment [Table]",
        "terseLabel": "Schedule Of Segment Reporting Information By Segment [Table]"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": {
     "auth_ref": [
      "r95",
      "r98",
      "r99",
      "r100",
      "r182"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule Of Segment Reporting Information By Segment [Text Block]",
        "terseLabel": "Financial Information by Business Segment"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Schedule Of Trading Securities And Other Trading Assets [Line Items]",
        "terseLabel": "Schedule of Trading Securities and Other Trading Assets [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI).",
        "label": "Schedule Of Trading Securities And Other Trading Assets [Table]",
        "terseLabel": "Schedule Of Trading Securities And Other Trading Assets [Table]"
       }
      }
     },
     "localname": "ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock": {
     "auth_ref": [
      "r154"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).",
        "label": "Schedule Of Unrealized Loss On Investments Table [Text Block]",
        "terseLabel": "Schedule of Unrealized Losses on Investment Securities"
       }
      }
     },
     "localname": "ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Segment [Domain]",
        "terseLabel": "Segments"
       }
      }
     },
     "localname": "SegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SegmentReportingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Segment Reporting [Abstract]"
       }
      }
     },
     "localname": "SegmentReportingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentReportingDisclosureTextBlock": {
     "auth_ref": [
      "r102"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.",
        "label": "Segment Reporting Disclosure [Text Block]",
        "terseLabel": "Business Segments"
       }
      }
     },
     "localname": "SegmentReportingDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegments"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentReportingInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Segment Reporting Information [Line Items]",
        "terseLabel": "Segment Reporting Information [Line Items]"
       }
      }
     },
     "localname": "SegmentReportingInformationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SharePrice": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Price of a single share of a number of saleable stocks of a company.",
        "label": "Share Price",
        "terseLabel": "Closing stock price"
       }
      }
     },
     "localname": "SharePrice",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_SharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares issued which are neither cancelled nor held in the treasury.",
        "label": "Shares Outstanding",
        "periodEndLabel": "Ending Balance, shares",
        "periodStartLabel": "Beginning Balance, shares"
       }
      }
     },
     "localname": "SharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_SignificantAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r80"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.",
        "label": "Significant Accounting Policies [Text Block]",
        "terseLabel": "Summary of Significant Accounting Policies"
       }
      }
     },
     "localname": "SignificantAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_StatementBusinessSegmentsAxis": {
     "auth_ref": [
      "r0",
      "r98",
      "r182",
      "r192",
      "r193",
      "r194",
      "r378"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business segments.",
        "label": "Statement Business Segments [Axis]",
        "terseLabel": "Segments"
       }
      }
     },
     "localname": "StatementBusinessSegmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r19",
      "r199"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Statement Equity Components [Axis]",
        "terseLabel": "Equity Components"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "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.",
        "label": "Statement [Line Items]",
        "terseLabel": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement Of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement Of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement Of Income And Comprehensive Income [Abstract]"
       }
      }
     },
     "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement Of Stockholders Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]",
        "terseLabel": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLeasesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesAcquisitions": {
     "auth_ref": [
      "r7",
      "r8",
      "r200"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares of stock issued during the period pursuant to acquisitions.",
        "label": "Stock Issued During Period Shares Acquisitions",
        "terseLabel": "Shares issued for acquisition, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesAcquisitions",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross": {
     "auth_ref": [
      "r199",
      "r200"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.",
        "label": "Stock Issued During Period Shares Restricted Stock Award Gross",
        "terseLabel": "Restricted stock granted, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesRestrictedStockAwardGross",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": {
     "auth_ref": [
      "r7",
      "r8",
      "r199",
      "r200",
      "r231"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of share options (or share units) exercised during the current period.",
        "label": "Stock Issued During Period Shares Stock Options Exercised",
        "terseLabel": "Stock options exercised, shares"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueAcquisitions": {
     "auth_ref": [
      "r19",
      "r199",
      "r200"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of stock issued pursuant to acquisitions during the period.",
        "label": "Stock Issued During Period Value Acquisitions",
        "terseLabel": "Shares issued for acquisition"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueAcquisitions",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross": {
     "auth_ref": [
      "r7",
      "r8",
      "r199",
      "r200"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate value of stock related to Restricted Stock Awards issued during the period.",
        "label": "Stock Issued During Period Value Restricted Stock Award Gross",
        "terseLabel": "Restricted stock granted"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueRestrictedStockAwardGross",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised": {
     "auth_ref": [
      "r19",
      "r199",
      "r200"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of stock issued as a result of the exercise of stock options.",
        "label": "Stock Issued During Period Value Stock Options Exercised",
        "terseLabel": "Stock options exercised"
       }
      }
     },
     "localname": "StockIssuedDuringPeriodValueStockOptionsExercised",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r8",
      "r12",
      "r13",
      "r130"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10020.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "Stockholders Equity",
        "periodEndLabel": "Ending Balance",
        "periodStartLabel": "Beginning Balance",
        "terseLabel": "Total shareholders' equity",
        "totalLabel": "Total Shareholders' Equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Stockholders Equity [Abstract]",
        "terseLabel": "SHAREHOLDERS' EQUITY"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SubstandardMember": {
     "auth_ref": [
      "r120",
      "r167"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A category of financing receivables that are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the creditor will sustain some loss if the deficiencies are not corrected.",
        "label": "Substandard [Member]",
        "terseLabel": "Classified - substandard [Member]"
       }
      }
     },
     "localname": "SubstandardMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Supplemental Cash Flow Information [Abstract]",
        "terseLabel": "SUPPLEMENTAL DISCLOSURES"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets": {
     "auth_ref": [
      "r363",
      "r364"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tier 1 capital divided by risk weighted assets as defined by regulations.",
        "label": "Tier One Risk Based Capital To Risk Weighted Assets",
        "terseLabel": "Tier 1 risk-based capital ratio reduction"
       }
      }
     },
     "localname": "TierOneRiskBasedCapitalToRiskWeightedAssets",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_TimeDeposits": {
     "auth_ref": [
      "r329",
      "r361"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10210.0,
       "parentTag": "us-gaap_Deposits",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of time deposit liabilities, including certificates of deposit.",
        "label": "Time Deposits",
        "terseLabel": "Certificates of deposit"
       }
      }
     },
     "localname": "TimeDeposits",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1": {
     "auth_ref": [
      "r74",
      "r75",
      "r76"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.",
        "label": "Transfer Of Portfolio Loans And Leases To Held For Sale1",
        "terseLabel": "Transfers of loans to held for sale"
       }
      }
     },
     "localname": "TransferOfPortfolioLoansAndLeasesToHeldForSale1",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TransferToOtherRealEstate": {
     "auth_ref": [
      "r74",
      "r75",
      "r76"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.",
        "label": "Transfer To Other Real Estate",
        "terseLabel": "Transfers of loans to other real estate owned"
       }
      }
     },
     "localname": "TransferToOtherRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": {
     "auth_ref": [
      "r315"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.",
        "label": "Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]",
        "terseLabel": "Financial Instruments"
       }
      }
     },
     "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockMember": {
     "auth_ref": [
      "r18",
      "r201"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.",
        "label": "Treasury Stock [Member]",
        "terseLabel": "Treasury Stock [Member]"
       }
      }
     },
     "localname": "TreasuryStockMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TreasuryStockShares": {
     "auth_ref": [
      "r18",
      "r201"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.",
        "label": "Treasury Stock Shares",
        "terseLabel": "Treasury stock, shares"
       }
      }
     },
     "localname": "TreasuryStockShares",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_TreasuryStockSharesAcquired": {
     "auth_ref": [
      "r8",
      "r199",
      "r200"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares that have been repurchased during the period and are being held in treasury.",
        "label": "Treasury Stock Shares Acquired",
        "negatedLabel": "Treasury shares acquired, shares"
       }
      }
     },
     "localname": "TreasuryStockSharesAcquired",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_TreasuryStockValue": {
     "auth_ref": [
      "r18",
      "r201",
      "r202"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10070.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.",
        "label": "Treasury Stock Value",
        "negatedLabel": "Treasury stock (7,025 and 6,160 shares - at cost, respectively)"
       }
      }
     },
     "localname": "TreasuryStockValue",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock": {
     "auth_ref": [
      "r122",
      "r124"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financing receivable modified as troubled debt restructuring.",
        "label": "Troubled Debt Restructurings On Financing Receivables Table [Text Block]",
        "terseLabel": "Loans Identified as TDRs"
       }
      }
     },
     "localname": "TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_TypeOfAdoptionMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Adoption and early adoption of sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues Accounting Standards Updates to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.",
        "label": "Type Of Adoption [Member]",
        "terseLabel": "Type of Adoption"
       }
      }
     },
     "localname": "TypeOfAdoptionMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TypeOfArrangementAxis": {
     "auth_ref": [
      "r253"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.",
        "label": "Type Of Arrangement [Axis]",
        "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative"
       }
      }
     },
     "localname": "TypeOfArrangementAxis",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember": {
     "auth_ref": [
      "r335"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This category includes information about debt issued by US Government Corporations and Agencies. Investments in such US Government Corporations may include debt securities issued by the Government National Mortgage Association (Ginnie Mae) and by the Federal National Mortgage Association (Fannie Mae) and the Federal Home Loan Mortgage Corporation (Freddie Mac).",
        "label": "U S Government Corporations And Agencies Securities [Member]",
        "terseLabel": "U.S. Government Sponsored Entities and Agencies [Member]"
       }
      }
     },
     "localname": "USGovernmentCorporationsAndAgenciesSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USStatesAndPoliticalSubdivisionsMember": {
     "auth_ref": [
      "r211",
      "r380"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments.",
        "label": "U S States And Political Subdivisions [Member]",
        "terseLabel": "Obligations of State and Political Subdivisions [Member]"
       }
      }
     },
     "localname": "USStatesAndPoliticalSubdivisionsMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USTreasurySecuritiesMember": {
     "auth_ref": [
      "r211",
      "r227",
      "r324"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This category includes information about debt securities issued by the United States Department of the Treasury and backed by the United States government. Such securities primarily consist of treasury bills (short-term maturities - one year or less), treasury notes (intermediate term maturities - two to ten years), and treasury bonds (long-term maturities - ten to thirty years).",
        "label": "U S Treasury Securities [Member]",
        "terseLabel": "US Treasury Securities [Member]"
       }
      }
     },
     "localname": "USTreasurySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UnrealizedGainLossOnInvestments": {
     "auth_ref": [
      "r68"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail": {
       "order": 10030.0,
       "parentTag": "us-gaap_GainLossOnSaleOfEquityInvestments",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.",
        "label": "Unrealized Gain Loss On Investments",
        "terseLabel": "Net unrealized gains (losses) recognized on securities still held"
       }
      }
     },
     "localname": "UnrealizedGainLossOnInvestments",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": {
     "auth_ref": [
      "r84",
      "r90"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.",
        "label": "Weighted Average Number Of Diluted Shares Outstanding",
        "terseLabel": "Diluted",
        "totalLabel": "Total diluted average common shares outstanding"
       }
      }
     },
     "localname": "WeightedAverageNumberOfDilutedSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Weighted Average Number Of Shares Outstanding [Abstract]",
        "terseLabel": "AVERAGE COMMON SHARES OUTSTANDING",
        "verboseLabel": "Denominator:"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": {
     "auth_ref": [
      "r83",
      "r90"
     ],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.",
        "label": "Weighted Average Number Of Shares Outstanding Basic",
        "terseLabel": "Basic",
        "verboseLabel": "Total average basic common shares outstanding"
       }
      }
     },
     "localname": "WeightedAverageNumberOfSharesOutstandingBasic",
     "nsuri": "http://fasb.org/us-gaap/2019-01-31",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareSummaryOfEarningsPerCommonShareDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "sharesItemType"
    },
    "wsbc_AccruingTdrsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accruing TDRS.",
        "label": "Accruing Tdrs [Member]",
        "terseLabel": "Accruing TDRs [Member]"
       }
      }
     },
     "localname": "AccruingTdrsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_AccumulatedUnrealizedGainsLossesOnSecuritiesAvailableForSaleMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated unrealized gains (losses) on securities available for sale.",
        "label": "Accumulated Unrealized Gains Losses On Securities Available For Sale [Member]",
        "terseLabel": "Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]"
       }
      }
     },
     "localname": "AccumulatedUnrealizedGainsLossesOnSecuritiesAvailableForSaleMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_AccumulatedUnrealizedGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated unrealized gains on securities transferred from available for sale to held to maturity.",
        "label": "Accumulated Unrealized Gains On Securities Transferred From Available For Sale To Held To Maturity [Member]",
        "terseLabel": "Accumulated Unrealized Gains on Debt Securities Transferred from Available For Sale to Held to Maturity [Member]"
       }
      }
     },
     "localname": "AccumulatedUnrealizedGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturityMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_AllowanceForCreditLossesAndRecordedInvestmentsInLoansTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Allowance for credit losses and recorded investments in loans.",
        "label": "Allowance For Credit Losses And Recorded Investments In Loans Table [Text Block]",
        "terseLabel": "Allowance for Credit Losses and Recorded Investments in Loans"
       }
      }
     },
     "localname": "AllowanceForCreditLossesAndRecordedInvestmentsInLoansTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_AllowanceForLoanCommitments": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail": {
       "order": 10060.0,
       "parentTag": "us-gaap_FinancingReceivableAllowanceForCreditLosses",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance to cover probable credit losses on loan commitments.",
        "label": "Allowance For Loan Commitments",
        "periodEndLabel": "Allowance for loan commitments, ending balance",
        "periodStartLabel": "Allowance for loan commitments, beginning balance",
        "terseLabel": "Allowance for loan commitments",
        "verboseLabel": "Allowance for credit losses associated with loan commitments"
       }
      }
     },
     "localname": "AllowanceForLoanCommitments",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_AmortizedCostAndFairValueDebtSecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost and fair value debt securities.",
        "label": "Amortized Cost And Fair Value Debt Securities [Abstract]"
       }
      }
     },
     "localname": "AmortizedCostAndFairValueDebtSecuritiesAbstract",
     "nsuri": "http://www.wesbanco.com/20190930",
     "xbrltype": "stringItemType"
    },
    "wsbc_AnnuityCommissionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Annuity commissions.",
        "label": "Annuity Commissions [Member]",
        "terseLabel": "Annuity Commissions [Member]"
       }
      }
     },
     "localname": "AnnuityCommissionsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_AssetsManaged": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Market value of cash and securities managed.",
        "label": "Assets Managed",
        "terseLabel": "Market value of assets managed or held in custody by trust and investment services segment"
       }
      }
     },
     "localname": "AssetsManaged",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_AvailableforSaleSecuritiesGrossUnrealizedGainLossLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Available-for-sale securities, gross unrealized gain (loss).",
        "label": "Availablefor Sale Securities Gross Unrealized Gain Loss [Line Items]",
        "terseLabel": "Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]"
       }
      }
     },
     "localname": "AvailableforSaleSecuritiesGrossUnrealizedGainLossLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfGrossRealizedGainsAndLossesOnSalesAndCallsOfSecuritiesAsWellAsGainsAndLossesOnEquitySecuritiesAsWellAsResultOfAdoptionOfASU201601Detail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBorrowings": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10020.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business combination recognized identifiable assets acquired and liabilities assumed borrowings.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Borrowings",
        "terseLabel": "Borrowings"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBorrowings",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business combination recognized identifiable assets acquired and liabilities assumed deposits.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits",
        "terseLabel": "Deposits"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsAndGoodwill": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail": {
       "order": 10070.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Business combination recognized identifiable assets acquired and liabilities assumed intangible assets and goodwill.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets And Goodwill",
        "terseLabel": "Goodwill and other intangible assets"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsAndGoodwill",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "It represents of business combination other real estate owned.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Real Estate Owned",
        "terseLabel": "Other real estate owned"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail": {
       "order": 10010.0,
       "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of tangible assets recognized as of the acquisition date.",
        "label": "Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Tangible Assets",
        "terseLabel": "Tangible assets acquired"
       }
      }
     },
     "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CapitalizedRightOfUseAssetAndLeaseLiabilitiesToBeRegcognizeUponAdoptionOfASU": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Capitalized right of use asset and lease liabilities to be regcognize upon adoption of ASU.",
        "label": "Capitalized Right Of Use Asset And Lease Liabilities To Be Regcognize Upon Adoption Of A S U",
        "terseLabel": "Capitalized right of use asset and lease liabilities to be regcognize upon adoption of ASU"
       }
      }
     },
     "localname": "CapitalizedRightOfUseAssetAndLeaseLiabilitiesToBeRegcognizeUponAdoptionOfASU",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoansSold": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Certain loans acquired in transfer not accounted for as debt securities accretable yield disposals of loans sold.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans Sold",
        "terseLabel": "Acquired loans, sold"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoansSold",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReductions": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Certain loans acquired in transfer not accounted for as debt securities, accretable yield, reductions.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reductions",
        "negatedLabel": "Reduction due to change in projected cash flows"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReductions",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAccretableYieldForLoansAcquiredWithDeterioratedCreditQualityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Certain loans acquired in transfer not accounted for as debt securities fair value.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Fair Value",
        "terseLabel": "Loans acquired with deteriorated credit quality, fair value"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesFairValue",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CertainLoansAcquiredInTransferNotAccountedForDebtSecuritiesAccretableYieldDisposalsOfLoans": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Certain loans acquired in transfer not accounted for debt securities, accretable yield, disposals of loans.",
        "label": "Certain Loans Acquired In Transfer Not Accounted For Debt Securities Accretable Yield Disposals Of Loans",
        "terseLabel": "Acquired loans, sold book value"
       }
      }
     },
     "localname": "CertainLoansAcquiredInTransferNotAccountedForDebtSecuritiesAccretableYieldDisposalsOfLoans",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CommercialAndIndustrialMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commercial and industrial.",
        "label": "Commercial And Industrial [Member]",
        "terseLabel": "Commercial and Industrial [Member]"
       }
      }
     },
     "localname": "CommercialAndIndustrialMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_CommercialBankingFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commercial banking fees.",
        "label": "Commercial Banking Fees [Member]",
        "terseLabel": "Commercial Banking Fees [Member]"
       }
      }
     },
     "localname": "CommercialBankingFeesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_CommercialRealEstateLandAndConstructionMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commercial real estate land and construction.",
        "label": "Commercial Real Estate Land And Construction [Member]",
        "terseLabel": "Commercial Real Estate - Land and Construction [Member]"
       }
      }
     },
     "localname": "CommercialRealEstateLandAndConstructionMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesLoansIdentifiedAsTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesScheduleOfRecordedInvestmentInLoansByCategoryDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTdrsDefaultedLaterRestructuredDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_CommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commitments to extend credit guarantees and various letters of credit outstanding.",
        "label": "Commitments To Extend Credit Guarantees And Various Letters Of Credit Outstanding Table [Text Block]",
        "terseLabel": "Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding"
       }
      }
     },
     "localname": "CommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_CommunityBankingMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Community banking.",
        "label": "Community Banking [Member]",
        "terseLabel": "Community Banking [Member]"
       }
      }
     },
     "localname": "CommunityBankingMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_ContingentObligationsToPurchaseLoansFundedByOtherEntities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contingent obligations to purchase loans funded by other entities.",
        "label": "Contingent Obligations To Purchase Loans Funded By Other Entities",
        "terseLabel": "Contingent obligations and other guarantees"
       }
      }
     },
     "localname": "ContingentObligationsToPurchaseLoansFundedByOtherEntities",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesCommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_CostRecoveryMethodMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cost recovery method.",
        "label": "Cost Recovery Method [Member]",
        "terseLabel": "Cost Recovery Method [Member]"
       }
      }
     },
     "localname": "CostRecoveryMethodMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt securities available for sale and held to maturity amortized cost.",
        "label": "Debt Securities Available For Sale And Held To Maturity Amortized Cost",
        "totalLabel": "Total debt securities, Amortized Cost"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCost",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfAmortizedCostAndFairValueOfAvailableForSaleAndHeldToMaturitySecuritiesByContractualMaturityDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_DeferredBenefitsForDirectors": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10090.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferred benefits for directors net. Dividend reinvestment from RABBI Trust comprised entirely of company stock.",
        "label": "Deferred Benefits For Directors",
        "negatedLabel": "Deferred benefits for directors"
       }
      }
     },
     "localname": "DeferredBenefitsForDirectors",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_DeferredBenefitsForDirectorsNet": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferred benefits for directors net. Dividend reinvestment from RABBI Trust comprised entirely of company stock.",
        "label": "Deferred Benefits For Directors Net",
        "negatedLabel": "Deferred benefits for directors- net"
       }
      }
     },
     "localname": "DeferredBenefitsForDirectorsNet",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_DefinedBenefitPlanVoluntaryFutureEmployerContributionsCurrentFiscalYear": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of voluntary contributions received and expected to be received by defined benefit plan from employer in current fiscal year.",
        "label": "Defined Benefit Plan Voluntary Future Employer Contributions Current Fiscal Year",
        "terseLabel": "Expected voluntary contribution for the year 2019"
       }
      }
     },
     "localname": "DefinedBenefitPlanVoluntaryFutureEmployerContributionsCurrentFiscalYear",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_DefinitiveAgreementAndPlanOfMergerMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Definitive Agreement and Plan of Merger.",
        "label": "Definitive Agreement And Plan Of Merger [Member]",
        "terseLabel": "Definitive Agreement and Plan of Merger [Member]"
       }
      }
     },
     "localname": "DefinitiveAgreementAndPlanOfMergerMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_DepositOverdraftsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deposit overdrafts.",
        "label": "Deposit Overdrafts [Member]",
        "terseLabel": "Deposit Overdrafts [Member]"
       }
      }
     },
     "localname": "DepositOverdraftsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_DisclosureThresholdForRestructuredContracts": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure threshold for restructured contracts.",
        "label": "Disclosure Threshold For Restructured Contracts",
        "terseLabel": "Threshold for TDR"
       }
      }
     },
     "localname": "DisclosureThresholdForRestructuredContracts",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ElectronicBankingFees": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10170.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reflects revenue received from electronic banking services such as point-of-sale and ATM transaction fees.",
        "label": "Electronic Banking Fees",
        "terseLabel": "Electronic banking fees"
       }
      }
     },
     "localname": "ElectronicBankingFees",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ElectronicBankingFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Electronic banking fees.",
        "label": "Electronic Banking Fees [Member]",
        "terseLabel": "Electronic Banking Fees [Member]"
       }
      }
     },
     "localname": "ElectronicBankingFeesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_EmployeeBenefits": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10070.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Costs and payments related to employee benefits such as health insurance, pension expense and contributions and other postretirement benefits expense.",
        "label": "Employee Benefits",
        "terseLabel": "Employee benefits",
        "verboseLabel": "Employee benefits (Non-interest expense)"
       }
      }
     },
     "localname": "EmployeeBenefits",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossScheduleOfAmountsReclassifiedFromAccumulatedOtherComprehensiveIncomeLossDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_EquityAndDebtSecurityTradesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Equity and debt security trades.",
        "label": "Equity And Debt Security Trades [Member]",
        "terseLabel": "Equity And Debt Security Trades [Member]"
       }
      }
     },
     "localname": "EquityAndDebtSecurityTradesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_EquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Equity securities.",
        "label": "Equity Securities [Abstract]",
        "terseLabel": "Equity securities:"
       }
      }
     },
     "localname": "EquitySecuritiesAbstract",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_EstimatedPercentageIncreaseInAllowanceForCreditLossesForLoanPortfolio": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Estimated percentage increase in allowance for credit losses for loan portfolio.",
        "label": "Estimated Percentage Increase In Allowance For Credit Losses For Loan Portfolio",
        "terseLabel": "Estimated percentage increase in allowance for credit losses for loan portfolio"
       }
      }
     },
     "localname": "EstimatedPercentageIncreaseInAllowanceForCreditLossesForLoanPortfolio",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "wsbc_ExtensionsOfMaturityCombinedWithInterestOnlyForPeriodOfLessThanYear": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Extensions of maturity combined with interest only for period of less than year.",
        "label": "Extensions Of Maturity Combined With Interest Only For Period Of Less Than Year",
        "terseLabel": "Accruing and non accrual TDR permitted interest-only payment period"
       }
      }
     },
     "localname": "ExtensionsOfMaturityCombinedWithInterestOnlyForPeriodOfLessThanYear",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "wsbc_FairValueTransfersBetweenLevel": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of the transfers between levels of the fair value hierarchy.",
        "label": "Fair Value Transfers Between Level",
        "terseLabel": "Fair value transfer amount"
       }
      }
     },
     "localname": "FairValueTransfersBetweenLevel",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_FairValuesInputsAssetsQuantitativeInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value inputs assets quantitative information line items.",
        "label": "Fair Values Inputs Assets Quantitative Information [Line Items]",
        "terseLabel": "Fair Value Inputs Asset Quantitative Information [Line Items]"
       }
      }
     },
     "localname": "FairValuesInputsAssetsQuantitativeInformationLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_FarmersCapitalBankCorporationMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Farmers Capital Bank Corporation.",
        "label": "Farmers Capital Bank Corporation [Member]",
        "terseLabel": "Farmers Capital Bank Corporation [Member]"
       }
      }
     },
     "localname": "FarmersCapitalBankCorporationMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsSummaryOfFinalPurchasePriceOfAcquisitionAndResultingGoodwillDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_FederalDepositInsuranceCorporationPremiumExpenseIncome": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10110.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Federal deposit insurance corporation premium expense income.",
        "label": "Federal Deposit Insurance Corporation Premium Expense Income",
        "terseLabel": "FDIC insurance"
       }
      }
     },
     "localname": "FederalDepositInsuranceCorporationPremiumExpenseIncome",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_FinancingReceivableAllowanceForCreditCommitmentsProvisionRecovery": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense/income related to estimated loss/income from credit commitments provision/recovery.",
        "label": "Financing Receivable Allowance For Credit Commitments Provision Recovery",
        "terseLabel": "Provision for loan commitments"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditCommitmentsProvisionRecovery",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfChangesInAllowanceForCreditLossesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_FirstSentryBancsharesIncMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "First sentry bancshares inc.",
        "label": "First Sentry Bancshares Inc [Member]",
        "terseLabel": "First Sentry Bancshares, Inc. [Member]"
       }
      }
     },
     "localname": "FirstSentryBancsharesIncMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_ForwardTBAContractsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Forward TBA contracts.",
        "label": "Forward T B A Contracts [Member]",
        "terseLabel": "Forward TBA Contracts [Member]"
       }
      }
     },
     "localname": "ForwardTBAContractsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_GrantorTrustsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Grantor trusts.",
        "label": "Grantor Trusts [Member]",
        "terseLabel": "Grantor Trusts [Member]"
       }
      }
     },
     "localname": "GrantorTrustsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_ImpairedFinancingReceivableWithNoRelatedAllowance": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit losses not related to recorded investment.",
        "label": "Impaired Financing Receivable With No Related Allowance",
        "terseLabel": "Related Allowance, With no specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithNoRelatedAllowance",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ImpairedFinancingReceivableWithSpecificAllowance": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit losses with specific allowance related to recorded investment.",
        "label": "Impaired Financing Receivable With Specific Allowance",
        "terseLabel": "Related Allowance, With a specific allowance recorded"
       }
      }
     },
     "localname": "ImpairedFinancingReceivableWithSpecificAllowance",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfImpairedLoansDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ImpairedLoansAppraisalAdjustments": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Impaired loans appraisal adjustments.",
        "label": "Impaired Loans Appraisal Adjustments",
        "terseLabel": "Impaired loans, Appraisal adjustments"
       }
      }
     },
     "localname": "ImpairedLoansAppraisalAdjustments",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "wsbc_ImpairedLoansFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Impaired loans fair value disclosure.",
        "label": "Impaired Loans Fair Value Disclosure",
        "terseLabel": "Impaired Loans"
       }
      }
     },
     "localname": "ImpairedLoansFairValueDisclosure",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfFairValueOfAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ImpairedLoansLiquidationExpenses": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Impaired loans liquidation expenses.",
        "label": "Impaired Loans Liquidation Expenses",
        "terseLabel": "Impaired Loans Liquidation Expenses"
       }
      }
     },
     "localname": "ImpairedLoansLiquidationExpenses",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnNonrecurringBasisDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "wsbc_ImpairedLoansNetMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Impaired loans net.",
        "label": "Impaired Loans Net [Member]",
        "terseLabel": "Total Impaired [Member]"
       }
      }
     },
     "localname": "ImpairedLoansNetMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_IncomeTaxExpenseBenefitCombinedFederalAndStateIncomeTaxRate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Income tax expense benefit combined federal and state income tax rate.",
        "label": "Income Tax Expense Benefit Combined Federal And State Income Tax Rate",
        "terseLabel": "Percentage of Federal and State income tax rate"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefitCombinedFederalAndStateIncomeTaxRate",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeDetailParentheticalDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "wsbc_InterestRateLoanCommitmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest rate loan commitments.",
        "label": "Interest Rate Loan Commitments [Member]",
        "terseLabel": "Interest Rate Loan Commitments [Member]"
       }
      }
     },
     "localname": "InterestRateLoanCommitmentsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_InvestmentSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investment securities in unrealized loss positions qualitative disclosure number of positions.",
        "label": "Investment Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions",
        "terseLabel": "Number of Securities Total"
       }
      }
     },
     "localname": "InvestmentSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_LargeAmountOfNonaccrualLoansOutstandingMinimumLoanAmountPerBorrower": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Large amount of nonaccrual loans, outstanding, minimum loan amount per borrower.",
        "label": "Large Amount Of Nonaccrual Loans Outstanding Minimum Loan Amount Per Borrower",
        "terseLabel": "Borrowers with large amount of loans outstanding, minimum amount of loans per borrower"
       }
      }
     },
     "localname": "LargeAmountOfNonaccrualLoansOutstandingMinimumLoanAmountPerBorrower",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsParentheticalDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_LargeAmountOfNonaccrualLoansOutstandingNetLoanAmountOfAllBorrowers": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Large amount of nonaccrual loans, outstanding, net loan amount of all borrowers.",
        "label": "Large Amount Of Nonaccrual Loans Outstanding Net Loan Amount Of All Borrowers",
        "terseLabel": "Borrowers with large amount of loans outstanding, net"
       }
      }
     },
     "localname": "LargeAmountOfNonaccrualLoansOutstandingNetLoanAmountOfAllBorrowers",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsParentheticalDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_LinesOfCredit": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unused portions of various lines of credit products.",
        "label": "Lines Of Credit",
        "terseLabel": "Lines of credit"
       }
      }
     },
     "localname": "LinesOfCredit",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesCommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_LoanSwapsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Loan swaps.",
        "label": "Loan Swaps [Member]",
        "terseLabel": "Loan Swaps [Member]"
       }
      }
     },
     "localname": "LoanSwapsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfFairValuesOfDerivativeInstrumentsOnBalanceSheetsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_LoansApprovedButNotClosed": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Credit offerings by the bank to customer in which the customer has either not completed the closing or accepted the offer.",
        "label": "Loans Approved But Not Closed",
        "terseLabel": "Loans approved but not closed"
       }
      }
     },
     "localname": "LoansApprovedButNotClosed",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesCommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_LoansPastDueAndAccruingInterestExcludingTDRS": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Loans past due and accruing interest excluding TDRS.",
        "label": "Loans Past Due And Accruing Interest Excluding T D R S",
        "terseLabel": "Past due loans excluded TDRs past due and accruing"
       }
      }
     },
     "localname": "LoansPastDueAndAccruingInterestExcludingTDRS",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesParentheticalDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "wsbc_LoansReceivableNetCurrent": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Loans receivable net current.",
        "label": "Loans Receivable Net Current",
        "terseLabel": "Total loans, current"
       }
      }
     },
     "localname": "LoansReceivableNetCurrent",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ManagedMoneyMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Managed money.",
        "label": "Managed Money [Member]",
        "terseLabel": "Managed Money [Member]"
       }
      }
     },
     "localname": "ManagedMoneyMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_MaximumPercentageOfEquityOfOneIssuer": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The maximum percentage of shareholders' equity of any one issuer other than the U.S. government and its agencies.",
        "label": "Maximum Percentage Of Equity Of One Issuer",
        "terseLabel": "Maximum percentage of equity of one issuer"
       }
      }
     },
     "localname": "MaximumPercentageOfEquityOfOneIssuer",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "percentItemType"
    },
    "wsbc_MortgageBankingIncomeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage banking income.",
        "label": "Mortgage Banking Income [Member]",
        "terseLabel": "Mortgage Banking Income [Member]"
       }
      }
     },
     "localname": "MortgageBankingIncomeMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureDerivativesAndHedgingActivitiesSummaryOfEffectOfDerivativeInstrumentsOnIncomeStatementDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_MortgageMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage.",
        "label": "Mortgage [Member]",
        "terseLabel": "Mortgage [Member]"
       }
      }
     },
     "localname": "MortgageMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_MunicipalDebtSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Municipal debt securities.",
        "label": "Municipal Debt Securities [Member]",
        "terseLabel": "Municipal Debt Securities [Member]"
       }
      }
     },
     "localname": "MunicipalDebtSecuritiesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_NetGainLossOnOtherRealEstateOwnedAndOtherAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10220.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net gain (loss) resulting from sales and other disposals of other real estate owned and other assets, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned and other assets after acquisition or physical possession.",
        "label": "Net Gain Loss On Other Real Estate Owned And Other Assets",
        "terseLabel": "Net gain on other real estate owned and other assets",
        "verboseLabel": "Net gain on other real estate owned and other assets"
       }
      }
     },
     "localname": "NetGainLossOnOtherRealEstateOwnedAndOtherAssets",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_NetNonFiduciaryAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net non fiduciary assets.",
        "label": "Net Non Fiduciary Assets",
        "terseLabel": "Total non-fiduciary assets of the trust and investment services segment"
       }
      }
     },
     "localname": "NetNonFiduciaryAssets",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_NetUnrealizedGainsAndLossesOnInvestmentsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net unrealized gains and losses on investments.",
        "label": "Net Unrealized Gains And Losses On Investments [Line Items]",
        "terseLabel": "Net Unrealized Gains And Losses On Investments [Line Items]"
       }
      }
     },
     "localname": "NetUnrealizedGainsAndLossesOnInvestmentsLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_NonAccrualLoansMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nonaccrual loans.",
        "label": "Non Accrual Loans [Member]",
        "terseLabel": "Non-Accrual Loans [Member]"
       }
      }
     },
     "localname": "NonAccrualLoansMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_NonAccrualTdrsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Non accrual TDRS.",
        "label": "Non Accrual Tdrs [Member]",
        "terseLabel": "Non-Accrual TDRs [Member]"
       }
      }
     },
     "localname": "NonAccrualTdrsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_NonCashTransactionRelatedToAcquisition": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Non cash transaction related to acquisition.",
        "label": "Non Cash Transaction Related To Acquisition",
        "terseLabel": "Non-cash transactions related to acquisition"
       }
      }
     },
     "localname": "NonCashTransactionRelatedToAcquisition",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_NonInterestIncomeDerivedFromMortgageBankingActivities": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10200.0,
       "parentTag": "us-gaap_NoninterestIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The non interest income derived from mortgage banking.Includes fees earned from loans sold in the secondary market, gains and losses on the sale of mortgage loans to investors, and gains and losses resulting from mortgage-related derivative financial instruments.",
        "label": "Non Interest Income Derived From Mortgage Banking Activities",
        "terseLabel": "Mortgage banking income"
       }
      }
     },
     "localname": "NonInterestIncomeDerivedFromMortgageBankingActivities",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_NonaccrualLoansOutstandingGreaterThanOneMillionDollarsPerBorrowerNumberOfBorrowers": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of borrowers with nonaccrual Loan advances outstanding greater than one million U.S. dollars.",
        "label": "Nonaccrual Loans Outstanding Greater Than One Million Dollars Per Borrower Number Of Borrowers",
        "terseLabel": "Number of borrowers with loans greater than one million"
       }
      }
     },
     "localname": "NonaccrualLoansOutstandingGreaterThanOneMillionDollarsPerBorrowerNumberOfBorrowers",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesRecordedInvestmentInNonAccrualLoansAndTdrsParentheticalDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_NumberOfBranchesAcquired": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of branches acquired.",
        "label": "Number Of Branches Acquired",
        "terseLabel": "Number of branches acquired"
       }
      }
     },
     "localname": "NumberOfBranchesAcquired",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_NumberOfHoldingsGreaterThanSpecifiedPercentageOfEquity": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of holdings greater than specified percentage of equity.",
        "label": "Number Of Holdings Greater Than Specified Percentage Of Equity",
        "terseLabel": "Number of holdings greater than specified percentage of equity"
       }
      }
     },
     "localname": "NumberOfHoldingsGreaterThanSpecifiedPercentageOfEquity",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_NumberOfRestructuredContractsGreaterThanOneMillion": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of restructured contracts greater than one million.",
        "label": "Number Of Restructured Contracts Greater Than One Million",
        "terseLabel": "Number of restructured contracts greater than $0 million"
       }
      }
     },
     "localname": "NumberOfRestructuredContractsGreaterThanOneMillion",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_OldLineBancsharesIncMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Old Line Bancshares, Inc.",
        "label": "Old Line Bancshares Inc [Member]",
        "terseLabel": "Old Line [Member]"
       }
      }
     },
     "localname": "OldLineBancsharesIncMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_OtherRealEstateOwnedAndRepossessedAssetsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other real estate owned and repossessed assets.",
        "label": "Other Real Estate Owned And Repossessed Assets Table [Text Block]",
        "terseLabel": "Summary of Other Real Estate Owned and Repossessed Assets"
       }
      }
     },
     "localname": "OtherRealEstateOwnedAndRepossessedAssetsTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_OverdraftLimits": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unused portion of available funds under overdraft programs on deposit programs.",
        "label": "Overdraft Limits",
        "terseLabel": "Overdraft limits"
       }
      }
     },
     "localname": "OverdraftLimits",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesCommitmentsToExtendCreditGuaranteesAndVariousLettersOfCreditOutstandingDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_PaymentProcessingFees": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Payment processing fees.",
        "label": "Payment Processing Fees",
        "terseLabel": "Payment Processing Fees"
       }
      }
     },
     "localname": "PaymentProcessingFees",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_PaymentProcessingFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Payment processing fees.",
        "label": "Payment Processing Fees [Member]",
        "terseLabel": "Payment Processing Fees [Member]"
       }
      }
     },
     "localname": "PaymentProcessingFeesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_PersonalServiceChargesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Personal service charges.",
        "label": "Personal Service Charges [Member]",
        "terseLabel": "Personal Service Charges [Member]"
       }
      }
     },
     "localname": "PersonalServiceChargesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_ProceedsFromRepurchaseOfTreasuryStock": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10130.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Proceeds from (repurchase of) treasury stock.",
        "label": "Proceeds From Repurchase Of Treasury Stock",
        "terseLabel": "Treasury shares sold - net"
       }
      }
     },
     "localname": "ProceedsFromRepurchaseOfTreasuryStock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ProceedsFromSaleOfEquitySecurities": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10200.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Proceeds from sale of equity securities.",
        "label": "Proceeds From Sale Of Equity Securities",
        "terseLabel": "Proceeds from sales"
       }
      }
     },
     "localname": "ProceedsFromSaleOfEquitySecurities",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ProceedsFromSaleOfPortfolioLoans": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": {
       "order": 10240.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Proceeds from sale of portfolio loans.",
        "label": "Proceeds From Sale Of Portfolio Loans",
        "terseLabel": "Sale of portfolio loans- net"
       }
      }
     },
     "localname": "ProceedsFromSaleOfPortfolioLoans",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfCashFlows"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_PurchasePriceAllocationAdjustmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Purchase price allocation adjustment.",
        "label": "Purchase Price Allocation Adjustment [Member]",
        "terseLabel": "Purchase Price Allocation Adjustment [Member]"
       }
      }
     },
     "localname": "PurchasePriceAllocationAdjustmentMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAllocationOfPurchasePriceOfAssetsAcquiredAndLiabilitiesAssumedDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_RealEstateAcquiredThroughForeclosureAndDevelopmentInProcess": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Real estate acquired through foreclosure and development in process.",
        "label": "Real Estate Acquired Through Foreclosure And Development In Process",
        "terseLabel": "Foreclosure proceedings in process on residential real estate loans"
       }
      }
     },
     "localname": "RealEstateAcquiredThroughForeclosureAndDevelopmentInProcess",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ReclassificationOfCallableHeldToMaturitySecurities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reclassification of callable held -to- maturity securities.",
        "label": "Reclassification Of Callable Held To Maturity Securities",
        "terseLabel": "Reclassification of callable held-to-maturity securities"
       }
      }
     },
     "localname": "ReclassificationOfCallableHeldToMaturitySecurities",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_RecordedInvestmentInNonAccrualLoansAndTdrsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Recorded investment in non accrual loans and troubled debt restructurings.",
        "label": "Recorded Investment In Non Accrual Loans And Tdrs Table [Text Block]",
        "terseLabel": "Recorded Investment in Non-Accrual Loans and TDRs"
       }
      }
     },
     "localname": "RecordedInvestmentInNonAccrualLoansAndTdrsTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_RegulatoryCapitalImpactPeriod": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Regulatory capital impact period.",
        "label": "Regulatory Capital Impact Period",
        "terseLabel": "Regulatory capital impact period"
       }
      }
     },
     "localname": "RegulatoryCapitalImpactPeriod",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "durationItemType"
    },
    "wsbc_ResidentialRealEstateHomeEquityAndConsumerLoansClassifiedAsSubstandard": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Residential real estate home equity and consumer loans classified as substandard.",
        "label": "Residential Real Estate Home Equity And Consumer Loans Classified As Substandard",
        "terseLabel": "Aggregate amount of residential real estate, home equity and consumer loans classified as substandard"
       }
      }
     },
     "localname": "ResidentialRealEstateHomeEquityAndConsumerLoansClassifiedAsSubstandard",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ResidentialRealEstateHomeEquityAndConsumerLoansClassifiedAsSubstandardAndAccruing": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Residential real estate home equity and consumer loans classified as substandard and accruing.",
        "label": "Residential Real Estate Home Equity And Consumer Loans Classified As Substandard And Accruing",
        "terseLabel": "Internally assigned loan grades to residential real estate, home equity and consumer loans"
       }
      }
     },
     "localname": "ResidentialRealEstateHomeEquityAndConsumerLoansClassifiedAsSubstandardAndAccruing",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_RestructuringAndMergerRelatedCharges": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10130.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations. Amount of expenses associated with business combination merger activities. Excludes expenses related to an asset retirement obligation.",
        "label": "Restructuring And Merger Related Charges",
        "terseLabel": "Restructuring and merger-related expense"
       }
      }
     },
     "localname": "RestructuringAndMergerRelatedCharges",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_RevenueRecognitionDisclosureTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Revenue recognition disclosure.",
        "label": "Revenue Recognition Disclosure [Text Block]",
        "terseLabel": "Revenue Recognition"
       }
      }
     },
     "localname": "RevenueRecognitionDisclosureTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognition"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_RevenueRecognitionPeriodDescription": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Revenue recognition period description.",
        "label": "Revenue Recognition Period Description",
        "terseLabel": "Point of revenue recognition"
       }
      }
     },
     "localname": "RevenueRecognitionPeriodDescription",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_SalariesAndOfficerCompensation": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": {
       "order": 10060.0,
       "parentTag": "us-gaap_NoninterestExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Expenditures for salaries for officers and non-officers. Does not include pension and post-retirement benefit expense or other labor-related non-salary expense.",
        "label": "Salaries And Officer Compensation",
        "terseLabel": "Salaries and wages"
       }
      }
     },
     "localname": "SalariesAndOfficerCompensation",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_ScheduleOfAntidilutiveSecuritiesIncludedInComputationOfEarningsPerShareLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of antidilutive securities included in computation of earnings per share.",
        "label": "Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]",
        "terseLabel": "Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfAntidilutiveSecuritiesIncludedInComputationOfEarningsPerShareLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_ScheduleOfAntidilutiveSecuritiesIncludedInComputationOfEarningsPerShareTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Table]",
        "label": "Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Table]",
        "terseLabel": "Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Table]"
       }
      }
     },
     "localname": "ScheduleOfAntidilutiveSecuritiesIncludedInComputationOfEarningsPerShareTable",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureEarningsPerCommonShareAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_ScheduleOfAvailableForSaleSecuritiesAndHeldToMaturityLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of available for sale securities and held to maturity.",
        "label": "Schedule Of Available For Sale Securities And Held To Maturity [Line Items]",
        "terseLabel": "Schedule Of Available For Sale Securities And Held To Maturity [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesAndHeldToMaturityLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_ScheduleOfAvailableForSaleSecuritiesAndHeldToMaturityTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule Of Available For Sale Securities And Held To Maturity [Table]",
        "label": "Schedule Of Available For Sale Securities And Held To Maturity [Table]",
        "terseLabel": "Schedule Of Available For Sale Securities And Held To Maturity [Table]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesAndHeldToMaturityTable",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_ScheduleOfChangesInAccretableYieldsOfAcquiredLoansTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the summary of the change in accretable yield relating to all acquired loans.",
        "label": "Schedule Of Changes In Accretable Yields Of Acquired Loans Table [Text Block]",
        "terseLabel": "Summary of Changes in Accretable Yield for Loans Acquired with Deteriorated Credit Quality"
       }
      }
     },
     "localname": "ScheduleOfChangesInAccretableYieldsOfAcquiredLoansTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_ScheduleOfDefinedBenefitPlanDisclosureTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of defined benefit plan disclosure.",
        "label": "Schedule Of Defined Benefit Plan Disclosure Table [Text Block]",
        "terseLabel": "Schedule of Defined Benefit Pension Plan"
       }
      }
     },
     "localname": "ScheduleOfDefinedBenefitPlanDisclosureTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBenefitPlansTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_ScheduleOfRevenueRecognitionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of revenue recognition.",
        "label": "Schedule Of Revenue Recognition [Line Items]",
        "terseLabel": "Schedule of Revenue Recognition [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfRevenueRecognitionLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_SecuritiesAmortizedCost": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities amortized cost.",
        "label": "Securities Amortized Cost",
        "totalLabel": "Total securities, Amortized Cost"
       }
      }
     },
     "localname": "SecuritiesAmortizedCost",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfFairValueAndAmortizedCostOfAvailableForSaleAndHeldToMaturitySecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated pre-tax unrealized loss on investments on securities impacting investments.",
        "label": "Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments",
        "terseLabel": "Unrealized Losses, Total"
       }
      }
     },
     "localname": "SecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesContinuousUnrealizedLossPositionFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position.",
        "label": "Securities Continuous Unrealized Loss Position Fair Value",
        "terseLabel": "Fair Value, Total"
       }
      }
     },
     "localname": "SecuritiesContinuousUnrealizedLossPositionFairValue",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLossesAccumulatedInInvestments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Continuous unrealized loss position less than twelve months aggregate losses accumulated in investments.",
        "label": "Securities Continuous Unrealized Loss Position Less Than Twelve Months Aggregate Losses Accumulated In Investments",
        "negatedLabel": "Less than 12 months, Unrealized Losses"
       }
      }
     },
     "localname": "SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLossesAccumulatedInInvestments",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the aggregate fair value of investments in debt and equity securities that have been in a continuous unrealized loss position for less than twelve months.",
        "label": "Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value",
        "terseLabel": "Less than 12 months, Fair Value"
       }
      }
     },
     "localname": "SecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesAccumulatedInInvestments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Continuous unrealized loss position twelve months or longer aggregate losses accumulated in investments.",
        "label": "Securities Continuous Unrealized Loss Position Twelve Months Or Longer Aggregate Losses Accumulated In Investments",
        "negatedLabel": "12 months or more, Unrealized Losses"
       }
      }
     },
     "localname": "SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLossesAccumulatedInInvestments",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the aggregate fair value of investments in debt and equity securities that have been in a continuous unrealized loss position for twelve months or longer.",
        "label": "Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value",
        "terseLabel": "12 months or more, Fair Value"
       }
      }
     },
     "localname": "SecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SecuritiesGrossRealizedGainLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities Gross Realized Gain Loss [Abstract]",
        "label": "Securities Gross Realized Gain Loss [Abstract]"
       }
      }
     },
     "localname": "SecuritiesGrossRealizedGainLossAbstract",
     "nsuri": "http://www.wesbanco.com/20190930",
     "xbrltype": "stringItemType"
    },
    "wsbc_SecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of investment positions in that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.",
        "label": "Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year",
        "terseLabel": "12 months or more, Number of Securities"
       }
      }
     },
     "localname": "SecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_SecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of investment positions in a continuous unrealized loss position for less than one year, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.",
        "label": "Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year",
        "terseLabel": "Less than 12 months, Number of Securities"
       }
      }
     },
     "localname": "SecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSecuritiesScheduleOfUnrealizedLossesOnInvestmentSecuritiesDetail"
     ],
     "xbrltype": "integerItemType"
    },
    "wsbc_SubordinatedDebtAndJuniorSubordinatedDebt": {
     "auth_ref": [],
     "calculation": {
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets": {
       "order": 10160.0,
       "parentTag": "us-gaap_DebtAndCapitalLeaseObligations",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Subordinated debt and junior subordinated debt.",
        "label": "Subordinated Debt And Junior Subordinated Debt",
        "terseLabel": "Subordinated debt and junior subordinated debt"
       }
      }
     },
     "localname": "SubordinatedDebtAndJuniorSubordinatedDebt",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureFairValueMeasurementEstimatesFairValueOfFinancialInstrumentsDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedBalanceSheets"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_SummaryOfCommercialLoansByRiskGradeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Summary of commercial loans by risk grade.",
        "label": "Summary Of Commercial Loans By Risk Grade [Abstract]",
        "terseLabel": "Summary of commercial loans by risk grade"
       }
      }
     },
     "localname": "SummaryOfCommercialLoansByRiskGradeAbstract",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfCommercialLoansByRiskGradeDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_SummaryOfRevenueRecognitionByTypeAndPointOfRecognitionTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Summary of revenue recognition by type and point of recognition.",
        "label": "Summary Of Revenue Recognition By Type And Point Of Recognition Table [Text Block]",
        "terseLabel": "Summary of Revenue Recognition"
       }
      }
     },
     "localname": "SummaryOfRevenueRecognitionByTypeAndPointOfRecognitionTableTextBlock",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "wsbc_SummaryOfSignificantAccountingPoliciesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Summary of significant accounting policies.",
        "label": "Summary Of Significant Accounting Policies [Line Items]",
        "terseLabel": "Summary Of Significant Accounting Policies [Line Items]"
       }
      }
     },
     "localname": "SummaryOfSignificantAccountingPoliciesLineItems",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_SummaryOfSignificantAccountingPoliciesTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Summary Of Significant Accounting Policies [Table]",
        "label": "Summary Of Significant Accounting Policies [Table]",
        "terseLabel": "Summary Of Significant Accounting Policies [Table]"
       }
      }
     },
     "localname": "SummaryOfSignificantAccountingPoliciesTable",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail"
     ],
     "xbrltype": "stringItemType"
    },
    "wsbc_TdrsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "TDRS.",
        "label": "Tdrs [Member]",
        "terseLabel": "TDRs Accruing Interest [Member]"
       }
      }
     },
     "localname": "TdrsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesSummaryOfAgeAnalysisOfLoanCategoriesDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_ThresholdForIndividuallyEvaluatingCommercialLoansForImpairment": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Threshold for individually evaluating commercial loans for impairment.",
        "label": "Threshold For Individually Evaluating Commercial Loans For Impairment",
        "terseLabel": "Troubled debt restructuring threshold"
       }
      }
     },
     "localname": "ThresholdForIndividuallyEvaluatingCommercialLoansForImpairment",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansParentheticalDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_TrailCommissionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trail commissions.",
        "label": "Trail Commissions [Member]",
        "terseLabel": "Trail Commissions [Member]"
       }
      }
     },
     "localname": "TrailCommissionsMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_TreasuryStockValueAcquiredCostMethodAdjustments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Treasury stock value acquired cost method adjustments.",
        "label": "Treasury Stock Value Acquired Cost Method Adjustments",
        "negatedLabel": "Treasury shares acquired"
       }
      }
     },
     "localname": "TreasuryStockValueAcquiredCostMethodAdjustments",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_TrustAccountFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trust account fees.",
        "label": "Trust Account Fees [Member]",
        "terseLabel": "Trust Account fees [Member]"
       }
      }
     },
     "localname": "TrustAccountFeesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_TrustAndInvestmentServicesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trust and investment services.",
        "label": "Trust And Investment Services [Member]",
        "terseLabel": "Trust And Investment Services [Member]",
        "verboseLabel": "Trust and Investment Services [Member]"
       }
      }
     },
     "localname": "TrustAndInvestmentServicesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureBusinessSegmentsFinancialInformationByBusinessSegmentDetail",
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureMergersAndAcquisitionsAdditionalInformationDetail"
     ],
     "xbrltype": "domainItemType"
    },
    "wsbc_UnamortizedDiscountOnLoansPurchased": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unamortized discount on loans purchased.",
        "label": "Unamortized Discount On Loans Purchased",
        "terseLabel": "Unamortized discount on purchased loans from acquisitions"
       }
      }
     },
     "localname": "UnamortizedDiscountOnLoansPurchased",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureLoansAndAllowanceForCreditLossesAdditionalInformationDetail"
     ],
     "xbrltype": "monetaryItemType"
    },
    "wsbc_WesMarkFeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Wes mark fees.",
        "label": "Wes Mark Fees [Member]",
        "terseLabel": "WesMark Fees [Member]"
       }
      }
     },
     "localname": "WesMarkFeesMember",
     "nsuri": "http://www.wesbanco.com/20190930",
     "presentation": [
      "http://www.wesbanco.com/20190930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenueRecognitionDetail"
     ],
     "xbrltype": "domainItemType"
    }
   },
   "unitCount": 12
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "280",
   "URI": "http://asc.fasb.org/topic&trid=2134510"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118952595&loc=d3e4437-111522"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5162-111524"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(4)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953550-111524"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5258-111524"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953659-111524"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5066-111524"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=d3e5111-111524"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118936363&loc=SL6953401-111524"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 6.L.1)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/subtopic&trid=2196772"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10152-111534"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "30",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(1)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(3)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(1)(ii)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939409&loc=d3e18794-111554"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27405-111563"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27198-111563"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.1)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "http://asc.fasb.org/topic&trid=2196928"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19(a)(7))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919258-210447"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921830-210448"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921833-210448"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921835-210448"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82921842-210448"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "79",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "80",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922895-210455"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118955579&loc=SL82922900-210455"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=118942371&loc=SL82922954-210456"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29,30)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(1)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(2)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(d))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(12))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.3,4)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=118944142&loc=SL49130690-203046-203046"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "10",
   "Topic": "710",
   "URI": "http://asc.fasb.org/extlink&oid=6409733&loc=d3e19524-108361"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "10",
   "Topic": "710",
   "URI": "http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.8)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(j)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "715",
   "URI": "http://asc.fasb.org/topic&trid=2235017"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "10",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116855982&loc=d3e4534-113899"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)(iv)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11149-113907"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=118258462&loc=d3e11178-113907"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e526-108580"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "37",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5227-128473"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5333-128473"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(1)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i),(j),(k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(4)",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "805",
   "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "805",
   "URI": "http://asc.fasb.org/topic&trid=2303972"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "808",
   "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c),(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i-k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4CC",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(6)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624186-113959"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5708775-113959"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "182",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=116861445&loc=SL5629052-113961"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=118632142&loc=SL109983883-199619"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "815",
   "URI": "http://asc.fasb.org/topic&trid=2229140"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(1)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(2)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL7498348-110258"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "820",
   "URI": "http://asc.fasb.org/topic&trid=2155941"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=d3e13220-108610"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13467-108611"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=118260190&loc=d3e13476-108611"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(4)",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=84165051&loc=d3e45377-112738"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(13))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(2)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(4)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/subtopic&trid=77888251"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(3)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=119202524&loc=SL77919359-209981"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL34724394-108580"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=118948506&loc=d3e107207-111719"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(1)(i)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "340",
   "Topic": "928",
   "URI": "http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "http://asc.fasb.org/extlink&oid=68070981&loc=d3e40544-110947"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "940",
   "URI": "http://asc.fasb.org/subtopic&trid=2176304"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "210",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=117340910&loc=d3e59706-112781"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6)(a)(1))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(7)(d))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.10(4))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.10)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.12)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.13,16)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15(5))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.2)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.4)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.6(a)(1))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.7(d))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.7)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669619-108580"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.1)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.1-5)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.10)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.11)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.12)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.13(a),(b))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.13)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.14(b))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.14)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.2)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.4)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.6)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.7)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.8)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.9)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Subparagraph": "(b)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6477933&loc=d3e60009-112784"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6477933&loc=d3e60009-112784"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/subtopic&trid=2209399"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=SL7669625-108580"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "325",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75031641&loc=d3e63345-112809"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "405",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "470",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Subparagraph": "(c)(1)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "505",
   "Subparagraph": "(c)(2)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=d3e65071-112826"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(1)(b))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(10))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118930883&loc=d3e557-108580"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.15(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.16)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(18))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.3(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117419784&loc=SL117783719-158441"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=118951672&loc=d3e1436-108581"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117420044&loc=d3e19393-158473"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=SL6090603-123010"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15)",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "http://asc.fasb.org/subtopic&trid=2324412"
  },
  "r384": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b"
  },
  "r385": {
   "Name": "Exchange Act",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "d1-1"
  },
  "r386": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-13"
  },
  "r387": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1-"
  },
  "r388": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r389": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(1)(e))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868656-224227"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(14))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(210.5-03(11))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(20))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(21))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(7)(c))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(9)(a))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.6)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "220",
   "URI": "http://asc.fasb.org/topic&trid=2134417"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a),(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a),(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(2))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21C",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=SL94080552-108585"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(28))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3044-108585"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3095-108585"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=118932676&loc=d3e3098-108585"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1448-109256"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1505-109256"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "48",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e2538-109256"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "55",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e2626-109256"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "52",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "260",
   "URI": "http://asc.fasb.org/topic&trid=2144383"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599"
  }
 },
 "version": "2.1"
}
