Regulatory Matters - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Potential maximum dividends without prior regulatory approval	$ 166,900
Average required reserve balance in Federal Reserve Bank	$ 500	$ 2,300
Percentage of Risk-weighted assets in bank holding companies in total capital	8.00%
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%
Minimum Tier 1 leverage ratio	4.00%
Percentage of well-capitalized levels of Tier 1 risk-based capital	8.00%
Percentage of well-capitalized levels of total risk-based capital	10.00%
Percentage of well-capitalized levels of Tier 1 leverage capital	5.00%
Provision of the Dodd-Frank	$ 15,000,000
Junior subordinated debt	138,222
Trust preferred securities included in Tier Two capital	$ 136,500
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Tier 1 leverage ratio	4.00%
Wesbanco Bank, Inc [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Percentage of Risk-weighted assets in bank holding companies in total capital	8.00%
Common equity tier 1, well capitalized	6.50%
Minimum Tier 1 leverage ratio	4.00%
Percentage of well-capitalized levels of total risk-based capital	10.00%
Percentage of well-capitalized levels of Tier 1 leverage capital	5.00%
Junior Subordinated Debt [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Junior subordinated debt	$ 138,200

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

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Assets threshold provision of Dodd Frank Act.

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Average non interest bearing reserve balance required in federal reserve bank.

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Bank dividend restriction amount.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital minimum purposes under the regulatory framework for prompt corrective action.

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Common equity tier one capital required for capital minimum adequacy to average assets.

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Common equity tier one capital required to be well capitalized to average assets.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital minimum purposes under the regulatory framework for prompt corrective action.

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Trust Preferred Securities Included In Tier Two Capital.

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