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Regulatory Matters - Summary of Risk-Based Capital Amounts and Ratios (Detail) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Percentage of risk-weighted assets in bank holding companies in Tier 1 4.00%  
Tier 1 capital to risk-weighted assets, minimum value 6.00%  
Total capital to risk-weighted assets, minimum value 8.00%  
Common equity tier 1, minimum value 4.50%  
Tier 1 leverage, well capitalized 5.00%  
Tier 1 capital to risk-weighted assets, well capitalized 8.00%  
Total capital to risk-weighted assets, well capitalized 10.00%  
Common equity tier 1, well capitalized 6.50%  
Tier 1 leverage, amount $ 1,576,764,000 $ 1,586,165,000
Tier 1 capital to risk-weighted assets, amount 1,576,764,000 1,586,165,000
Total capital to risk-weighted assets, amount 1,933,007,000 1,795,661,000
Common equity tier 1, amount $ 1,432,280,000 $ 1,441,681,000
Tier 1 leverage, ratio 9.90% 10.02%
Tier 1 capital to risk-weighted assets, ratio 12.33% 14.05%
Total capital to risk-weighted assets, ratio 15.11% 15.91%
Common equity tier 1, ratio 11.20% 12.77%
Wesbanco Bank, Inc [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Percentage of risk-weighted assets in bank holding companies in Tier 1 4.00%  
Tier 1 capital to risk-weighted assets, minimum value 6.00%  
Total capital to risk-weighted assets, minimum value 8.00%  
Common equity tier 1, minimum value 4.50%  
Tier 1 leverage, well capitalized 5.00%  
Tier 1 capital to risk-weighted assets, well capitalized 8.00%  
Total capital to risk-weighted assets, well capitalized 10.00%  
Common equity tier 1, well capitalized 6.50%  
Tier 1 leverage, amount $ 1,558,305,000 $ 1,529,227,000
Tier 1 capital to risk-weighted assets, amount 1,558,305,000 1,529,227,000
Total capital to risk-weighted assets, amount 1,634,548,000 1,608,723,000
Common equity tier 1, amount $ 1,558,305,000 $ 1,529,227,000
Tier 1 leverage, ratio 9.80% 9.68%
Tier 1 capital to risk-weighted assets, ratio 12.22% 13.60%
Total capital to risk-weighted assets, ratio 12.81% 14.31%
Common equity tier 1, ratio 12.22% 13.60%
Minimum [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier 1 leverage, amount $ 636,966,000 $ 633,089,000
Tier 1 capital to risk-weighted assets, amount 767,334,000 677,190,000
Total capital to risk-weighted assets, amount 1,023,112,000 902,920,000
Common equity tier 1, amount 575,500,000 507,893,000
Minimum [Member] | Wesbanco Bank, Inc [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Tier 1 leverage, amount 636,033,000 631,920,000
Tier 1 capital to risk-weighted assets, amount 765,439,000 674,622,000
Total capital to risk-weighted assets, amount 1,020,585,000 899,496,000
Common equity tier 1, amount $ 574,079,000 $ 505,967,000