Wesbanco Bank Community Development Corporation - Schedule of Condensed Income 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
Interest income
Loans									$ 226,993	$ 203,993	$ 172,182
Total interest income	$ 80,819	$ 70,092	$ 67,585	$ 67,601	$ 67,660	$ 66,935	$ 66,729	$ 60,379	286,097	261,712	215,991
Provision for loan losses									8,520	8,195	6,552
Net interest income after provision for credit losses	69,560	59,812	57,963	57,518	58,035	58,811	58,112	53,666	244,852	228,634	186,823
Loss on investments	63	598	585	1,111	880	47		22	2,357	948	903
Non-interest expense	58,298	57,601	47,360	45,343	46,894	46,981	46,589	53,441	208,680	193,923	161,633
Income before provision for income taxes	32,682	23,228	30,194	31,568	31,167	30,016	29,595	18,415	117,671	109,177	93,694
Provision for income taxes	8,464	5,793	8,085	8,694	8,165	7,768	7,962	4,528	31,036	28,415	23,720
Net income	$ 24,218	$ 17,435	$ 22,109	$ 22,874	$ 23,002	$ 22,248	$ 21,633	$ 13,887	86,635	$ 80,762	$ 69,974
WBCDC [Member]
Interest income
Loans									1,383
Total interest income									1,383
Provision for loan losses									32
Net interest income after provision for credit losses									1,351
Loss on investments									(94)
Non-interest expense									79
Income before provision for income taxes									1,178
Provision for income taxes									436
Net income									$ 742