Wesbanco Bank Community Development Corporation - Schedule of Condensed Cash Flow 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
OPERATING ACTIVITIES
Net income	$ 52,854	$ 41,305	$ 4,488	$ 23,396	$ 36,376	$ 37,347	$ 44,814	$ 40,337	$ 122,044	$ 158,873	$ 143,112
Loss on investments	(691)	$ (787)	$ (1,299)	(1,491)	(520)	$ (235)	$ (2,909)	(657)	(4,268)	(4,320)
Net change in other assets									(30,280)	(33,400)	19,895
Net change in other liabilities									16,189	41,500	(1,347)
Net cash provided by operating activities									59,606	163,363	191,891
Investing Activities
Increase in loans									(538,688)	(61,804)	121,504
Net cash provided by (used in) investing activities									57,792	103,786	(51,859)
FINANCING ACTIVITIES
Net cash provided by (used in) financing activities									553,253	(201,539)	(88,418)
Net increase in cash, cash equivalents and restricted cash									670,651	65,610	51,614
Cash, cash equivalents and restricted cash at beginning of the year				234,796				$ 169,186	234,796	169,186	117,572
Cash, cash equivalents and restricted cash at end of the year	905,447				234,796				905,447	234,796	$ 169,186
WBCDC [Member]
OPERATING ACTIVITIES
Net income									20
Provision for loan losses									714
Loss on investments									58
Net change in other assets									(767)
Net change in other liabilities									(73)
Net cash provided by operating activities									(48)
Investing Activities
Increase in loans									(10,999)
Net cash provided by (used in) investing activities									(10,999)
FINANCING ACTIVITIES
Qualified equity investment by parent company									15,000
Net cash provided by (used in) financing activities									15,000
Net increase in cash, cash equivalents and restricted cash									3,953
Cash, cash equivalents and restricted cash at beginning of the year				$ 61,329					61,329
Cash, cash equivalents and restricted cash at end of the year	$ 65,282				$ 61,329				$ 65,282	$ 61,329