Wesbanco Bank Community Development Corporation - Schedule of Condensed Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income
Loans									$ 465,677	$ 393,166	$ 331,961
Other									5,007	5,433	5,320
Total interest and dividend income									541,277	484,253	414,957
Net interest income after provision for credit losses									371,739	388,706	339,472
Loss on investments	$ 691	$ 787	$ 1,299	$ 1,491	$ 520	$ 235	$ 2,909	$ 657	4,268	4,320
Non-interest expense	88,069	89,943	85,502	91,333	92,556	73,268	71,952	74,432	354,845	312,208	265,224
Income before provision for income taxes	64,557	48,974	4,530	27,017	43,422	45,681	54,917	49,195	145,079	193,214	174,524
Provision for income taxes	11,703	7,669	42	3,621	7,046	8,334	10,103	8,858	23,035	34,341	31,412
NET INCOME	$ 52,854	$ 41,305	$ 4,488	$ 23,396	$ 36,376	$ 37,347	$ 44,814	$ 40,337	122,044	$ 158,873	$ 143,112
WBCDC [Member]
Interest income
Loans									1,378
Other									26
Total interest and dividend income									1,404
Provision for loan losses									714
Net interest income after provision for credit losses									690
Loss on investments									(58)
Non-interest expense									603
Income before provision for income taxes									29
Provision for income taxes									9
NET INCOME									$ 20