Regulatory Matters - Additional Information (Detail) - USD ($)		12 Months Ended
	Mar. 23, 2022	Dec. 31, 2023	Dec. 31, 2022
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Potential maximum dividends without prior regulatory approval		$ 135,500,000
Average required reserve balance in Federal Reserve Bank		$ 0	$ 0
Percentage of Risk-weighted assets in bank holding companies in total capital		0.08
Common equity tier 1, minimum value		4.50%
Common equity tier 1, well capitalized		6.50%
Percentage of Risk-weighted assets in banking subsidiaries		6.00%
Percentage of well-capitalized levels of Tier 1 risk-based capital		8.00%
Percentage of well-capitalized levels of total risk-based capital		0.10
Provision of the Dodd-Frank		$ 15,000,000,000
Percentage of common equity tier 1		7.00%
Percentage of tier 1 risk based capital		8.50%
Percentage of total risk-based capital		10.50%
Junior subordinated debt		$ 130,975,000
Trust preferred securities included in Tier Two capital		126,900,000
Assets		$ 17,712,374,000	16,931,905,000
Current Expected Losses Methodology for Allowances [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CECL on regulatory capital adoption delay period		2 years
CECL on regulatory capital transition period after delay		3 years
CECL on regulatory capital transition period		5 years
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Tier 1 leverage ratio		0.04
Assets		$ 15,000,000,000	$ 15,000,000,000
Minimum [Member] | Current Expected Losses Methodology for Allowances [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Regulatory capital levels required capital benefits to be well capitalized		11.00%
Maximum [Member] | Current Expected Losses Methodology for Allowances [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Regulatory capital levels required capital benefits to be well capitalized		15.00%
Wesbanco Bank, Inc [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1, well capitalized		6.50%
Percentage of well-capitalized levels of Tier 1 leverage capital		0.05
Subordinated Debt [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Debt instrument, aggregate principal amount	$ 150,000,000
Fixed interest rate	3.75%
Debt Instrument, Description of Variable Rate Basis		Three Month Term Secured Overnight Financing Rate ("SOFR")
Subordinated Debt [Member] | SOFR [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Variable rate based on the three-month SOFR plus	1.787%