Business Segments - Schedule of Financial Information to Wesbanco's Business Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Interest and dividend income	$ 825,641	$ 711,516	$ 513,656
Less: Interest expense	347,433	230,178	39,343
NET INTEREST INCOME	478,208	481,338	474,313
Less: Provision for credit losses	19,206	17,734	(1,663)
Net interest income after provision for credit losses	459,002	463,604	475,976
Non-interest income:
Trust fees	30,676	28,135	27,551
Service charges in deposits	29,979	26,116	26,281
Digital banking income	19,953	19,454	20,002
Net securities brokerage revenue	10,238	10,055	9,525
Bank-owned life insurance	9,544	11,002	10,728
Net securities gains (losses)	1,408	900	(1,777)
Net gains on other real estate owned and other assets	142	1,520	482
Mortgage banking income	4,270	2,652	5,129
Other income	15,832	13,701	12,403
Less :
Salaries and wages	177,516	176,938	167,028
Employee benefits	46,141	46,901	37,771
Net occupancy	25,157	25,338	26,105
Equipment and software	41,303	36,666	32,508
Professional services	19,020	15,734	16,333
Marketing	9,764	11,178	9,335
FDIC insurance	14,215	12,249	7,901
Amortization of intangibles	8,251	9,088	10,278
Income before provision for income taxes	185,114	194,049	236,401
Provision for income taxes	33,604	35,017	44,288
Net income	151,510	159,032	192,113
Reconciliation of segment profit (loss)
Preferred stock dividends	(10,125)	(10,125)	(10,125)
Net income available to common shareholders	141,385	148,907	181,988
Operating Segments [Member]
Non-interest income:
Total income	586,985	584,051	593,367
Less :
Net income	151,510	159,032	192,113
Reconciliation of segment profit (loss)
Preferred stock dividends	(10,125)	(10,125)	(10,125)
Net income available to common shareholders	141,385	148,907	181,988
Community Banking [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Interest and dividend income	825,641	711,516	513,656
Less: Interest expense	327,350	210,763	28,168
NET INTEREST INCOME	498,291	500,753	485,488
Less: Provision for credit losses	19,206	17,734	(1,663)
Net interest income after provision for credit losses	479,085	483,019	487,151
Non-interest income:
Trust fees			26,281
Service charges in deposits	29,979	26,116
Digital banking income	19,953	19,454	20,002
Net swap fee and valuation income	5,941	6,912	7,067
Net securities brokerage revenue	10,238	10,055	9,525
Net insurance services revenue	3,651	3,555	3,749
Bank-owned life insurance	9,544	11,002	10,728
Payment processing fees	3,504	3,652	3,352
Net securities gains (losses)	1,408	900	(1,777)
Net gains on other real estate owned and other assets	142	1,520	482
Mortgage banking income	4,270	2,652	5,129
Other income	8,677	5,776	5,298
Total income	576,392	574,613	576,987
Less :
Salaries and wages	170,080	169,402	159,791
Employee benefits	44,344	45,148	36,124
Net occupancy	24,948	25,136	25,868
Equipment and software	41,183	36,619	32,306
Miscellaneous taxes	12,978	11,678	12,002
Professional services	11,832	9,740	10,900
Marketing	9,712	10,280	8,441
FDIC insurance	14,215	12,249	7,901
Supplies	5,895	6,447	3,742
Telecommunications	4,718	5,325	4,688
General administration	6,027	5,494	4,324
Merger-related and restructuring	3,578	3,775	1,723
Amortization of intangibles	8,059	8,855	9,996
Other segment items	17,753	17,260	17,250
Income before provision for income taxes	201,070	207,205	241,931
Provision for income taxes	36,711	38,273	45,593
Net income	164,359	168,932	196,338
Trust and Investment Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Less: Interest expense	3,993	2,923	315
NET INTEREST INCOME	(3,993)	(2,923)	(315)
Net interest income after provision for credit losses	(3,993)	(2,923)	(315)
Non-interest income:
Trust fees	22,496	20,474	19,134
WesMarkFees	8,180	7,661	8,417
Total income	26,683	25,212	27,236
Less :
Salaries and wages	7,436	7,536	7,237
Employee benefits	1,797	1,753	1,647
Net occupancy	209	202	237
Equipment and software	120	47	202
Miscellaneous taxes	8	8	10
Professional services	490	580	560
Marketing	52	96	77
Supplies	125	132	123
General administration	136	152	207
Amortization of intangibles	192	233	282
Corporate overhead expenses	5,779	5,300	5,191
Other segment items	283	269	286
Income before provision for income taxes	10,056	8,904	11,177
Provision for income taxes	2,112	1,870	2,347
Net income	7,944	7,034	8,830
Corporate Other [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Less: Interest expense	16,090	16,492	10,860
NET INTEREST INCOME	(16,090)	(16,492)	(10,860)
Net interest income after provision for credit losses	(16,090)	(16,492)	(10,860)
Non-interest income:
Other income		718	4
Total income	(16,090)	(15,774)	(10,856)
Less :
Professional services	6,698	5,414	4,874
Marketing		802	817
General administration	375	100	65
Merger-related and restructuring	2,822	55
Other segment items	27	(85)	95
Income before provision for income taxes	(26,012)	(22,060)	(16,707)
Provision for income taxes	(5,219)	(5,126)	(3,652)
Net income	$ (20,793)	$ (16,934)	$ (13,055)