Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024
OPERATING ACTIVITIES
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 195,506	$ 143,573
INVESTING ACTIVITIES
Net increase in loans held for investment	(345,726)	(817,803)
Available-for-sale debt securities:
Proceeds from sales	876,893	0
Proceeds from maturities, prepayments and calls	431,025	235,028
Purchases of securities	(1,083,134)	(213,403)
Held-to-maturity debt securities:
Proceeds from maturities, prepayments and calls	32,557	35,682
Purchases of securities	(31,429)	0
Purchases of premises and equipment – net	(13,077)	(5,734)
Net cash received from PFC acquisition	200,454	0
Sale of portfolio loans - net	73,893	0
Proceeds from bank owned life insurance	3,013	3,363
Net cash provided by (used in) investing activities	144,469	(762,867)
FINANCING ACTIVITIES
Increase in deposits	286,046	668,796
Proceeds from Federal Home Loan Bank borrowings	1,175,000	1,175,000
Repayment of Federal Home Loan Bank borrowings	(1,400,000)	(1,350,000)
(Decrease) increase in other short-term borrowings	(78,572)	34,748
Principal repayments of finance lease obligations	(3,290)	(2,550)
Dividends paid to common shareholders	(94,918)	(63,568)
Dividends paid to preferred shareholders	(7,594)	(7,594)
Issuance of preferred stock, net of issuance costs	224,383	0
Issuance of common stock	159	190,967
Treasury shares purchased - net	(1,089)	(991)
Net cash provided by financing activities	100,125	644,808
Net increase in cash, cash equivalents and restricted cash	440,100	25,514
Cash, cash equivalents and restricted cash at beginning of the period	568,137	595,383
Cash, cash equivalents and restricted cash at end of the period	1,008,237	620,897
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	338,662	255,053
Income taxes paid	21,850	23,735
Transfers of loans to other real estate owned	299	152
Non-cash transactions related to the PFC acquisition	$ 1,007,845	$ 0

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Proceeds from (repurchase of) treasury stock.

+ References

No definition available.

+ Details

Name:	wsbc_ProceedsFromRepurchaseOfTreasuryStock
Namespace Prefix:	wsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Proceeds from sale of portfolio loans net.

+ References

No definition available.

+ Details

Name:	wsbc_ProceedsFromSaleOfPortfolioLoansNet
Namespace Prefix:	wsbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration