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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
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