v3.26.1
Business Segments - Schedule of Financial Information to Wesbanco's Business Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Interest and dividend income $ 333,051 $ 336,382 $ 658,674 $ 589,614
Less: Interest expense 110,889 119,613 221,112 214,326
NET INTEREST INCOME 222,162 216,769 437,562 375,288
Less: Provision for credit losses 9,185 3,218 8,288 72,101
Net interest income after provision for credit losses 212,977 213,551 429,274 303,187
Non-interest income:        
Trust fees 9,830 9,657 20,272 18,355
Service charges on deposits 11,546 10,484 22,507 19,070
Digital banking income 7,410 7,325 14,008 12,730
Net securities brokerage revenue 3,670 3,348 7,142 6,049
Bank-owned life insurance 4,317 3,450 8,127 6,878
Net securities gains 1,644 1,410 1,631 1,092
Net loss on other real estate owned and other assets 2,036 111 2,583 71
Mortgage banking income 1,055 2,364 1,974 3,504
Other income 8,989 5,062 13,021 9,167
Less :        
Salaries and wages 66,402 60,153 130,366 108,730
Employee benefits 19,148 18,857 36,759 31,827
Net occupancy 7,863 8,119 16,393 15,897
Equipment and software 15,640 17,140 31,317 30,190
Marketing 2,271 1,864 3,798 4,246
FDIC insurance 4,168 5,479 8,951 9,666
Merger-related and restructuring 1,003 41,056 4,716 61,066
Amortization of intangibles 7,141 9,204 14,301 13,427
Income before provision for income taxes 117,523 70,973 228,948 61,309
Provision for income taxes 24,846 13,558 47,635 12,886
Net income 92,677 57,415 181,313 48,423
Reconciliation of segment profit (loss)        
Preferred stock dividends (4,240) (2,531) (8,481) (5,063)
Net income available to common shareholders 88,437 54,884 172,832 43,360
Operating Segments [Member]        
Non-interest income:        
Total revenues 266,609 257,508 524,736 381,809
Less :        
Net income 92,677 57,415 181,313 48,423
Reconciliation of segment profit (loss)        
Preferred stock dividends (4,240) (2,531) (8,481) (5,063)
Net income available to common shareholders 88,437 54,884 172,832 43,360
Community Banking [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Interest and dividend income 333,051 336,382 658,674 589,614
Less: Interest expense 105,142 112,804 209,465 202,453
NET INTEREST INCOME 227,909 223,578 449,209 387,161
Less: Provision for credit losses 9,185 3,218 8,288 72,101
Net interest income after provision for credit losses 218,724 220,360 440,921 315,060
Non-interest income:        
Trust fees 0   0  
WesMark fees 0   0  
Service charges on deposits 11,546 10,484 22,507 19,070
Digital banking income 7,410 7,325 14,008 12,730
Net swap fee and valuation income 3,135 746 4,197 1,706
Net securities brokerage revenue 3,670 3,348 7,142 6,049
Net insurance services revenue 1,128 1,115 2,337 2,070
Bank-owned life insurance 4,317 3,450 8,127 6,878
Payment processing fees 776 805 1,647 1,696
Net securities gains 1,644 1,410 1,631 1,092
Net loss on other real estate owned and other assets 2,036 111 2,583 71
Mortgage banking income 1,055 2,364 1,974 3,504
Other income 7,085 2,374 9,034 4,624
Total revenues 262,526 253,892 516,108 374,550
Less :        
Salaries and wages 64,140 57,983 125,960 104,598
Employee benefits 18,622 18,307 35,689 30,797
Net occupancy 7,794 8,049 16,257 15,770
Equipment and software 14,647 17,063 30,319 30,056
Miscellaneous taxes 4,897 5,059 9,566 9,292
Professional services 3,671 4,637 8,349 8,407
Marketing 2,251 1,834 3,766 4,196
FDIC insurance 4,168 5,479 8,951 9,666
Supplies 1,836 2,037 3,844 3,722
Telecommunications 1,137 1,541 2,307 2,751
General administration 2,474 2,247 4,126 3,617
Merger-related and restructuring 328 40,301 3,666 53,992
Amortization of intangibles 6,845 8,816 13,709 12,999
Corporate overhead expenses 0   0  
Other segment items 6,186 4,673 10,238 9,558
Income before provision for income taxes 123,530 75,866 239,361 75,129
Provision for income taxes 26,677 15,705 50,546 15,815
Net income 96,853 60,161 188,815 59,314
Trust and Investment Services [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Interest and dividend income 0   0  
Less: Interest expense 1,649 1,500 3,469 2,435
NET INTEREST INCOME (1,649) (1,500) (3,469) (2,435)
Less: Provision for credit losses 0   0  
Net interest income after provision for credit losses (1,649) (1,500) (3,469) (2,435)
Non-interest income:        
Trust fees 7,640 7,698 15,982 14,372
WesMark fees 2,190 1,959 4,290 3,983
Service charges on deposits 0   0  
Digital banking income 0   0  
Net swap fee and valuation income 0   0  
Net securities brokerage revenue 0   0  
Net insurance services revenue 0   0  
Bank-owned life insurance 0   0  
Payment processing fees 0   0  
Net securities gains 0   0  
Net loss on other real estate owned and other assets 0   0  
Mortgage banking income 0   0  
Other income 0 760 0 760
Total revenues 8,181 8,917 16,803 16,680
Less :        
Salaries and wages 2,262 2,170 4,406 4,132
Employee benefits 526 550 1,070 1,030
Net occupancy 69 70 136 127
Equipment and software 993 77 998 134
Miscellaneous taxes 1 2 3 3
Professional services 222 166 365 304
Marketing 20 30 32 50
FDIC insurance 0   0  
Supplies 41 41 89 94
Telecommunications 0   0  
General administration 51 54 104 82
Merger-related and restructuring 0   0  
Amortization of intangibles 296 388 592 428
Corporate overhead expenses 1,852 2,021 3,819 3,601
Other segment items 6 50 266 81
Income before provision for income taxes 1,842 3,298 4,923 6,614
Provision for income taxes 423 693 1,034 1,389
Net income 1,419 2,605 3,889 5,225
Corporate Other [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Interest and dividend income 0   0  
Less: Interest expense 4,098 5,309 8,178 9,438
NET INTEREST INCOME (4,098) (5,309) (8,178) (9,438)
Less: Provision for credit losses 0   0  
Net interest income after provision for credit losses (4,098) (5,309) (8,178) (9,438)
Non-interest income:        
Trust fees 0   0  
WesMark fees 0   0  
Service charges on deposits 0   0  
Digital banking income 0   0  
Net swap fee and valuation income 0   0  
Net securities brokerage revenue 0   0  
Net insurance services revenue 0   0  
Bank-owned life insurance 0   0  
Payment processing fees 0   0  
Net securities gains 0   0  
Net loss on other real estate owned and other assets 0   0  
Mortgage banking income 0   0  
Other income 0 8 3 17
Total revenues (4,098) (5,301) (8,175) (9,421)
Less :        
Salaries and wages 0   0  
Employee benefits 0   0  
Net occupancy 0   0  
Equipment and software 0   0  
Miscellaneous taxes 0   0  
Professional services 2,607 1,832 5,238 3,542
Marketing 0   0  
FDIC insurance 0   0  
Supplies 0   0  
Telecommunications 0   0  
General administration 361 287 731 417
Merger-related and restructuring 675 755 1,050 7,074
Amortization of intangibles 0   0  
Corporate overhead expenses 0   0  
Other segment items 108 16 142 (20)
Income before provision for income taxes (7,849) (8,191) (15,336) (20,434)
Provision for income taxes (2,254) (2,840) (3,945) (4,318)
Net income $ (5,595) $ (5,351) $ (11,391) $ (16,116)