Wesbanco Bank Community Development Corporation - Schedule of Condensed Balance Sheet (Parenthetical) (Detail) $ in Millions	Dec. 31, 2020 USD ($)
WBCDC [Member]
Schedule Of Subsidiary Financial Statements Table [Line Items]
Allowance for loan losses	$ 1.0

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant