Wesbanco Bank Community Development Corporation - Schedule of Condensed Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 117,572	$ 128,170	$ 86,685	$ 94,002
Loans, net of allowance for loan losses of $254	6,296,157	6,205,762
Other assets	155,004	180,488
Total Assets	9,816,178	9,790,877
Liabilities	8,420,857	8,449,469
Shareholder Equity	1,395,321	1,341,408	$ 1,122,132	$ 788,190
Total Liabilities and Shareholder Equity	9,816,178	9,790,877
WBCDC [Member]
ASSETS
Cash and due from banks	36,533	$ 31,303
Loans, net of allowance for loan losses of $254	35,218
Investments	820
Other assets	195
Total Assets	72,766
Liabilities	354
Shareholder Equity	72,412
Total Liabilities and Shareholder Equity	$ 72,766