XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.21.1

Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Derivatives, Fair Value [Line Items] |  |
Total gain (loss) on derivative financial instruments | $ 6,263 | $ (5,553)
Interest Rate Swaps [Member] | Other Income [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total gain (loss) on derivative financial instruments | 2,761 | (2,751)
Interest Rate Loan Commitments [Member] | Mortgage Banking Income [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total gain (loss) on derivative financial instruments | (1,016) | (145)
Forward TBA Contracts [Member] | Mortgage Banking Income [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total gain (loss) on derivative financial instruments | $ 4,518 | $ (2,657)

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=wsbc_InterestRateLoanCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=wsbc_MortgageBankingIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=wsbc_ForwardTBAContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |