v3.26.3
Business Segments - Schedule of Financial Information to Wesbanco's Business Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting Information [Line Items]        
Interest and dividend income $ 344,548 $ 342,886 $ 1,003,222 $ 932,500
Less: Interest expense 117,671 126,170 338,783 340,496
NET INTEREST INCOME 226,877 216,716 664,439 592,004
Less: Provision for credit losses 8,661 2,082 16,949 74,183
Net interest income after provision for credit losses 218,216 214,634 647,490 517,821
Non-interest income:        
Trust fees 9,666 8,987 29,938 27,342
Service charges on deposits 12,263 11,163 34,769 30,233
Digital banking income 7,476 7,324 21,485 20,053
Net securities brokerage revenue 3,267 2,961 10,408 9,010
Bank-owned life insurance 4,311 3,765 12,439 10,643
Net securities (losses) gains (151) 1,210 1,480 2,302
Net gain on OREO and other assets 194 329 2,776 400
Mortgage banking income 123 1,898 2,096 5,402
Other income 3,860 3,996 16,883 13,164
Less :        
Salaries and wages 69,079 60,583 199,444 169,314
Employee benefits 14,853 18,040 51,613 49,867
Net occupancy 7,927 8,819 24,320 24,716
Equipment and software 15,613 16,310 46,930 46,500
Marketing 4,965 2,979 8,763 7,225
FDIC insurance 4,631 5,820 13,582 15,487
Merger-related and restructuring 730 11,383 5,446 72,449
Amortization of intangibles 7,122 8,425 21,423 21,853
Income before provision for income taxes 113,215 103,310 342,162 164,618
Provision for income taxes 23,710 19,737 71,345 32,623
Net income 89,505 83,573 270,817 131,995
Reconciliation of segment profit (loss)        
Preferred stock dividends (4,240) (2,531) (12,721) (7,594)
Net income available to common shareholders 85,265 81,042 258,096 124,401
Operating Segments [Member]        
Non-interest income:        
Total revenues 264,082 259,498 788,818 641,307
Less :        
Net income 89,505 83,573 270,817 131,995
Reconciliation of segment profit (loss)        
Preferred stock dividends (4,240) (2,531) (12,721) (7,594)
Net income available to common shareholders 85,265 81,042 258,096 124,401
Community Banking [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Interest and dividend income 344,548 342,886 1,003,222 932,500
Less: Interest expense 112,100 118,756 321,565 321,210
NET INTEREST INCOME 232,448 224,130 681,657 611,290
Less: Provision for credit losses 8,661 2,082 16,949 74,183
Net interest income after provision for credit losses 223,787 222,048 664,708 537,107
Non-interest income:        
Trust fees 0 0 0 0
WesMark fees 0 0 0 0
Service charges on deposits 12,263 11,163 34,769 30,233
Digital banking income 7,476 7,324 21,485 20,053
Net swap fee and valuation income 4,857 3,231 9,054 4,937
Net securities brokerage revenue 3,267 2,961 10,408 9,010
Net insurance services revenue 874 929 3,211 2,999
Bank-owned life insurance 4,311 3,765 12,439 10,643
Payment processing fees 889 843 2,536 2,539
Net securities (losses) gains (151) 1,210 1,480 2,302
Net gain on OREO and other assets 194 329 2,776 400
Mortgage banking income 123 1,898 2,096 5,402
Other income 2,097 1,929 11,133 6,554
Total revenues 259,987 257,630 776,095 632,179
Less :        
Salaries and wages 66,761 58,361 192,720 162,960
Employee benefits 14,326 17,553 50,016 48,350
Net occupancy 7,858 8,747 24,115 24,517
Equipment and software 15,100 16,290 45,419 46,346
Miscellaneous taxes 4,997 4,933 14,563 14,225
Professional services 4,628 4,463 12,977 12,870
Marketing 4,939 2,970 8,705 7,166
FDIC insurance 4,631 5,820 13,582 15,487
Supplies 2,031 2,403 5,875 6,125
Telecommunications 1,046 1,533 3,353 4,284
General administration 2,328 2,543 6,453 6,160
Merger-related and restructuring 730 11,395 4,396 65,387
Amortization of intangibles 6,826 8,385 20,535 21,385
Corporate overhead expenses 0 0 0 0
Other segment items 5,686 3,240 15,926 12,796
Income before provision for income taxes 118,100 108,994 357,460 184,121
Provision for income taxes 24,919 20,979 75,465 36,794
Net income 93,181 88,015 281,995 147,327
Trust and Investment Services [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Interest and dividend income 0 0 0 0
Less: Interest expense 1,598 2,078 5,067 4,512
NET INTEREST INCOME (1,598) (2,078) (5,067) (4,512)
Less: Provision for credit losses 0 0 0 0
Net interest income after provision for credit losses (1,598) (2,078) (5,067) (4,512)
Non-interest income:        
Trust fees 7,411 6,955 23,390 21,327
WesMark fees 2,255 2,032 6,548 6,015
Service charges on deposits 0 0 0 0
Digital banking income 0 0 0 0
Net swap fee and valuation income 0 0 0 0
Net securities brokerage revenue 0 0 0 0
Net insurance services revenue 0 0 0 0
Bank-owned life insurance 0 0 0 0
Payment processing fees 0 0 0 0
Net securities (losses) gains 0 0 0 0
Net gain on OREO and other assets 0 0 0 0
Mortgage banking income 0 0 0 0
Other income 0 284 0 1,044
Total revenues 8,068 7,193 24,871 23,874
Less :        
Salaries and wages 2,318 2,222 6,724 6,354
Employee benefits 527 487 1,597 1,517
Net occupancy 69 72 205 199
Equipment and software 513 20 1,511 154
Miscellaneous taxes 2 1 5 4
Professional services 248 223 613 527
Marketing 26 9 58 59
FDIC insurance 0 0 0 0
Supplies 52 41 141 135
Telecommunications 0 0 0 0
General administration 55 46 159 128
Merger-related and restructuring 0 0 0 0
Amortization of intangibles 296 40 888 468
Corporate overhead expenses 1,821 1,747 5,640 5,348
Other segment items 124 183 390 264
Income before provision for income taxes 2,017 2,102 6,940 8,717
Provision for income taxes 423 441 1,457 1,830
Net income 1,594 1,661 5,483 6,887
Corporate Other [Member] | Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Interest and dividend income 0 0 0 0
Less: Interest expense 3,973 5,336 12,151 14,774
NET INTEREST INCOME (3,973) (5,336) (12,151) (14,774)
Less: Provision for credit losses 0 0 0 0
Net interest income after provision for credit losses (3,973) (5,336) (12,151) (14,774)
Non-interest income:        
Trust fees 0 0 0 0
WesMark fees 0 0 0 0
Service charges on deposits 0 0 0 0
Digital banking income 0 0 0 0
Net swap fee and valuation income 0 0 0 0
Net securities brokerage revenue 0 0 0 0
Net insurance services revenue 0 0 0 0
Bank-owned life insurance 0 0 0 0
Payment processing fees 0 0 0 0
Net securities (losses) gains 0 0 0 0
Net gain on OREO and other assets 0 0 0 0
Mortgage banking income 0 0 0 0
Other income 0 11 3 28
Total revenues (3,973) (5,325) (12,148) (14,746)
Less :        
Salaries and wages 0 0 0 0
Employee benefits 0 0 0 0
Net occupancy 0 0 0 0
Equipment and software 0 0 0 0
Miscellaneous taxes 0 0 0 0
Professional services 2,479 2,116 7,717 5,658
Marketing 0 0 0 0
FDIC insurance 0 0 0 0
Supplies 0 0 0 0
Telecommunications 0 0 0 0
General administration 490 348 1,221 765
Merger-related and restructuring 0 (12) 1,050 7,062
Amortization of intangibles 0 0 0 0
Corporate overhead expenses 0 0 0 0
Other segment items (40) 9 102 (11)
Income before provision for income taxes (6,902) (7,786) (22,238) (28,220)
Provision for income taxes (1,632) (1,683) (5,577) (6,001)
Net income $ (5,270) $ (6,103) $ (16,661) $ (22,219)