XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.21.1

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail) | 3 Months Ended
--- | ---
Mar. 31, 2021
Receivables [Abstract] |
Past due loans excluded TDRs past due and accruing | 90 days

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loans past due and accruing interest excluding TDRS. + References No definition available. + Details
Name: | wsbc_LoansPastDueAndAccruingInterestExcludingTDRS
Namespace Prefix: | wsbc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration