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Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Commitments and Contingencies Disclosure [Abstract] |  |
Lines of credit | $ 3,806,398 | $ 2,954,147
Loans approved but not closed | 398,204 | 472,810
Overdraft limits | 380,143 | 370,439
Letters of credit | 30,362 | 29,017
Contingent obligations and other guarantees | $ 30,782 | $ 68,235

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Contingent obligations to purchase loans funded by other entities. + References No definition available. + Details
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Namespace Prefix: | wsbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Unused portions of various lines of credit products. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Credit offerings by the bank to customer in which the customer has either not completed the closing or accepted the offer. + References No definition available. + Details
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- Definition Unused portion of available funds under overdraft programs on deposit programs. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant