Wesbanco Bank Community Development Corporation - Summary of New Market Tax Credit Carry Forward (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Schedule Of Subsidiary Financial Statements Table [Line Items]
Aggregate QEI Amount	$ 16,000
New Markets Tax Credit for year 2017	960
New Markets Tax Credit for year 2018	660
New Markets Tax Credit for year 2019	300
2011 [Member]
Schedule Of Subsidiary Financial Statements Table [Line Items]
Aggregate QEI Amount	5,000
New Markets Tax Credit for year 2017	300
2012 [Member]
Schedule Of Subsidiary Financial Statements Table [Line Items]
Aggregate QEI Amount	6,000
New Markets Tax Credit for year 2017	360
New Markets Tax Credit for year 2018	360
2013 [Member]
Schedule Of Subsidiary Financial Statements Table [Line Items]
Aggregate QEI Amount	5,000
New Markets Tax Credit for year 2017	300
New Markets Tax Credit for year 2018	300
New Markets Tax Credit for year 2019	$ 300