Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of presentation — The accompanying unaudited interim financial statements of Wesbanco, Inc. and its consolidated subsidiaries (“Wesbanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2021. Wesbanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2021 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly Wesbanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on Wesbanco’s net income and shareholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year. Recent accounting pronouncements—The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) as noted below. ASU 2022-03 Fair Value Measurement (Topic 820) In June 2022, the FASB issued ASU 2022-03, "Fair Value Measurement (Topic 820).” The amendments in this ASU clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security, and therefore, is not considered in measuring fair value. Furthermore, the amendments to this ASU clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction. The update to this ASU requires the following disclosures for equity securities: (1) The fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; (2) The nature and remaining duration of the restriction(s) and; (3) The circumstances that could cause a lapse in the restriction(s). The amendments in this Update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Wesbanco is currently assessing the impact of ASU 2022-03 on its Consolidated Financial Statements. ASU 2022-02 Financial Instruments - Credit Losses (Topic 326) In March 2022, the FASB issued ASU 2022-02, "Financial Instruments - Credit Losses (Topic 326)". The amendments in this ASU eliminate the accounting guidance for Troubled Debt Restructurings ("TDRs") by creditors in Subtopic 310-40, "Receivables - Troubled Debt Restructurings by Creditors," while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance in paragraphs 310-20-35-9 through 35-11 to determine whether a modification results in a new loan or a continuation of an existing loan. In addition, for public business entities, the amendments in this Update require that an entity disclose current-period gross writeoffs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, "Financial Instruments - Credit Losses - Measured at Amortized Cost." The amendments in this Update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Wesbanco is currently assessing the impact of ASU 2022-02 on its Consolidated Financial Statements. ASU 2022-01 Derivatives and Hedging (Topic 815) In March 2022, the FASB issued ASU 2022-01, "Derivatives and Hedging (Topic 815)". The amendments in this ASU address several topics within ASU 2017-12, which was issued in August 2017 to improve the hedge accounting model. ASU 2022-01 expands the current last-of-layer method to allow multiple hedged layers of a single closed portfolio and renames the last-of-layer method as the portfolio layer method. Among other things, the ASU expands the scope of the portfolio layer method to include nonprepayable financial assets, provides additional guidance on the accounting for and disclosure of hedge basis adjustments that are applicable to the portfolio layer method whether a single hedged layer or multiple hedge layers are designated and specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio. For public business entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The adoption of this pronouncement is not expected to have a material impact on Wesbanco's Consolidated Financial Statements. ASU 2021-08 Business Combinations (Topic 805) In October 2021, the FASB issued ASU 2021-08, "Business Combinations (Topic 805)." The amendments in this Update require that an entity (acquirer) recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606, "Revenue Recognition." The amendments also apply to contract assets and contract liabilities from other contracts to which the provisions of Topic 606 apply, such as contract liabilities from the sale of nonfinancial assets within the scope of Subtopic 610-20, "Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets." For public business entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. The adoption of this pronouncement is not expected to have a material impact on Wesbanco's Consolidated Financial Statements. ASU 2020-04 and ASU 2021-01 Reference Rate Reform (Topic 848) In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848)”. This ASU provided temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the London Interbank Offered Rate ("LIBOR") or other reference rate expected to be discontinued on financial reporting. The ASU also provides optional expedients for contract modifications that replace a reference rate affected by reference rate reform. The guidance is effective as of March 12, 2020 through December 31, 2022, and can be adopted at any time during this period. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope”. This ASU refines the scope of Topic 848 and addresses questions about whether Topic 848 can be applied to derivative instruments that do not reference a rate that is expected to be discontinued, but that use an interest rate for margining, discounting or contract price alignment that is expected to be modified as a result of reference rate reform. ASU 2021-01 is effective upon issuance through December 31, 2024, and can be adopted at any time during this period. Wesbanco has not offered LIBOR for any new contracts after December 31, 2021. Wesbanco has chosen the One Month Term Secured Overnight Financing Rate ("1M Term SOFR") as its alternative replacement rate for LIBOR on both back-to-back swaps and on one-month variable loans. A transition plan was implemented in 2021 to identify and modify Wesbanco's loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR, and Wesbanco continues to assess the impact of adopting the new guidance on the consolidated financial statements on an ongoing basis, with no material impacts expected at this time.

Basis of presentation — The accompanying unaudited interim financial statements of Wesbanco, Inc. and its consolidated subsidiaries (“Wesbanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2021.

Wesbanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2021 Annual Report on Form 10-K filed with the Securities and Exchange Commission. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly Wesbanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on Wesbanco’s net income and shareholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.

Recent accounting pronouncements—The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) as noted below.

ASU 2022-03 Fair Value Measurement (Topic 820)

In June 2022, the FASB issued ASU 2022-03, "Fair Value Measurement (Topic 820).” The amendments in this ASU clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security, and therefore, is not considered in measuring fair value. Furthermore, the amendments to this ASU clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction. The update to this ASU requires the following disclosures for equity securities: (1) The fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; (2) The nature and remaining duration of the restriction(s) and; (3) The circumstances that could cause a lapse in the restriction(s). The amendments in this Update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Wesbanco is currently assessing the impact of ASU 2022-03 on its Consolidated Financial Statements.

ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)

In March 2022, the FASB issued ASU 2022-02, "Financial Instruments - Credit Losses (Topic 326)". The amendments in this ASU eliminate the accounting guidance for Troubled Debt Restructurings ("TDRs") by creditors in Subtopic 310-40, "Receivables - Troubled Debt Restructurings by Creditors," while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance in paragraphs 310-20-35-9 through 35-11 to determine whether a modification results in a new loan or a continuation of an existing loan. In addition, for public business entities, the amendments in this Update require that an entity disclose current-period gross writeoffs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, "Financial Instruments - Credit Losses - Measured at Amortized Cost." The amendments in this Update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Wesbanco is currently assessing the impact of ASU 2022-02 on its Consolidated Financial Statements.

ASU 2022-01 Derivatives and Hedging (Topic 815)

In March 2022, the FASB issued ASU 2022-01, "Derivatives and Hedging (Topic 815)". The amendments in this ASU address several topics within ASU 2017-12, which was issued in August 2017 to improve the hedge accounting model. ASU 2022-01 expands the current last-of-layer method to allow multiple hedged layers of a single closed portfolio and renames the last-of-layer method as the portfolio layer method. Among other things, the ASU expands the scope of the portfolio layer method to include nonprepayable financial assets, provides additional guidance on the accounting for and disclosure of hedge basis adjustments that are applicable to the portfolio layer method whether a single hedged layer or multiple hedge layers are designated and specifies how hedge basis adjustments should be considered when determining credit losses for the assets included in the closed portfolio. For public business entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years. The adoption of this pronouncement is not expected to have a material impact on Wesbanco's Consolidated Financial Statements.

ASU 2021-08 Business Combinations (Topic 805)

In October 2021, the FASB issued ASU 2021-08, "Business Combinations (Topic 805)." The amendments in this Update require that an entity (acquirer) recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with Topic 606, "Revenue Recognition." The amendments also apply to contract assets and contract liabilities from other contracts to which the provisions of Topic 606 apply, such as contract liabilities from the sale of nonfinancial assets within the scope of Subtopic 610-20, "Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets." For public business entities, the amendments in this Update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. The adoption of this pronouncement is not expected to have a material impact on Wesbanco's Consolidated Financial Statements.

ASU 2020-04 and ASU 2021-01 Reference Rate Reform (Topic 848)

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848)”. This ASU provided temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the London Interbank Offered Rate ("LIBOR") or other reference rate expected to be discontinued on financial reporting. The ASU also provides optional expedients for contract modifications that replace a reference rate affected by reference rate reform. The guidance is effective as of March 12, 2020 through December 31, 2022, and can be adopted at any time during this period. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope”. This ASU refines the scope of Topic 848 and addresses questions about whether Topic 848 can be applied to derivative instruments that do not reference a rate that is expected to be discontinued, but that use an interest rate for margining, discounting or contract price alignment that is expected to be modified as a result of reference rate reform. ASU 2021-01 is effective upon issuance through December 31, 2024, and can be adopted at any time during this period. Wesbanco has not offered LIBOR for any new contracts after December 31, 2021. Wesbanco has chosen the One Month Term Secured Overnight Financing Rate ("1M Term SOFR") as its alternative replacement rate for LIBOR on both back-to-back swaps and on one-month variable loans. A transition plan was implemented in 2021 to identify and modify Wesbanco's loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR, and Wesbanco continues to assess the impact of adopting the new guidance on the consolidated financial statements on an ongoing basis, with no material impacts expected at this time.