Wesbanco Bank Community Development Corporation - Schedule of Condensed Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest income
Loans									$ 393,166	$ 331,961	$ 272,007
Other									5,433	5,320	2,297
Total interest and dividend income									484,253	414,957	332,424
Provision for loan losses									11,065	7,597	9,983
Net interest income after provision for credit losses									388,706	339,472	280,309
Gain on investments	$ 520	$ 235	$ 2,909	$ 657	$ (1,303)	$ 84	$ 358	$ (39)	4,320	(900)
Non-interest expense	92,556	73,268	71,952	74,432	70,990	76,120	63,543	54,571	312,208	265,224	220,860
Income before provision for income taxes	43,422	45,681	54,917	49,195	54,484	39,002	40,504	40,533	193,214	174,524	148,289
Provision for income taxes	7,046	8,334	10,103	8,858	10,556	6,516	7,335	7,004	34,341	31,412	53,807
NET INCOME	$ 36,376	$ 37,347	$ 44,814	$ 40,337	$ 43,928	$ 32,486	$ 33,169	$ 33,529	158,873	$ 143,112	$ 94,482
WBCDC [Member]
Interest income
Loans									1,127
Other									25
Total interest and dividend income									1,152
Provision for loan losses									37
Net interest income after provision for credit losses									1,115
Gain on investments									252
Non-interest expense									235
Income before provision for income taxes									1,132
Provision for income taxes									260
NET INCOME									$ 872