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Employee Benefit Plans - Fair Values of the Wesbanco's Pension Plan Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | $ 165,744 | $ 202,783
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 95,536 | 129,182
Significant Other Observable Inputs (Level 2) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 70,208 | 73,601
Registered Investment Companies [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 42,622 | 54,737
Registered Investment Companies [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 42,622 | 54,737
Equity Securities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 52,914 | 74,445
Equity Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 52,914 | 74,445
Corporate Debt Securities [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 58,342 | 57,404
Corporate Debt Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 58,342 | 57,404
Municipal Obligations [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 1,764 | 2,124
Municipal Obligations [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 1,764 | 2,124
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | 10,102 | 14,073
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total defined benefit pension plan assets | $ 10,102 | $ 14,073

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- Definition Defined benefit plan fair value of plan assets excluding cash accrued interest and dividends and due to from brokers. + References No definition available. + Details
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