Wesbanco Bank Community Development Corporation - Schedule of Condensed Cash Flow Statement (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING ACTIVITIES
Net income	$ 24,218	$ 17,435	$ 22,109	$ 22,874	$ 23,002	$ 22,248	$ 21,633	$ 13,887	$ 86,635	$ 80,762	$ 69,974
Provision for loan losses									8,520	8,195	6,552
Loss on investments	(63)	$ (598)	$ (585)	(1,111)	(880)	$ (47)		(22)	(2,357)	(948)	(903)
Decrease in other assets									13,137	(4,293)	10,205
Net change in other liabilities									7,404	(7,988)	(1,896)
Net cash provided by operating activities									123,697	88,649	94,808
INVESTING ACTIVITIES
Decrease in loans									(174,952)	(293,306)	(199,760)
Net cash provided by investing activities									193,968	(210,591)	(173,006)
FINANCING ACTIVITIES
Net cash provided by financing activities									(276,180)	114,625	76,649
Net increase in cash and cash equivalents									41,485	(7,317)	(1,549)
Cash and cash equivalents at beginning of the year				86,685				$ 94,002	86,685	94,002	95,551
Cash and cash equivalents at end of the year	128,170				86,685				128,170	86,685	$ 94,002
WBCDC [Member]
OPERATING ACTIVITIES
Net income									742
Provision for loan losses									32
Loss on investments									94
Decrease in other assets									757
Net change in other liabilities									24
Net cash provided by operating activities									1,649
INVESTING ACTIVITIES
Decrease in loans									3,337
Net cash provided by investing activities									3,337
FINANCING ACTIVITIES
Qualified equity investment by parent company									0
Net cash provided by financing activities									0
Net increase in cash and cash equivalents									4,986
Cash and cash equivalents at beginning of the year				$ 26,317					26,317
Cash and cash equivalents at end of the year	$ 31,303				$ 26,317				$ 31,303	$ 26,317