Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations— Wesbanco, Inc. (“Wesbanco” or the “Company”) is a bank holding company offering a full range of financial services, including trust and investment services, mortgage banking, insurance and brokerage services. Wesbanco’s defined business segments are community banking and trust and investment services. As of December 31, 2020, Wesbanco’s banking subsidiary, Wesbanco Bank, Inc. (“Wesbanco Bank” or the “Bank”), headquartered in Wheeling, West Virginia, operates through 233 branches and 226 ATM machines in West Virginia, Ohio, western Pennsylvania, Kentucky, southern Indiana and Maryland. In addition, Wesbanco operates an insurance brokerage company, Wesbanco Insurance Services, Inc., and a full service broker/dealer, Wesbanco Securities, Inc.
Use of Estimates	Use of Estimates— The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Principles of Consolidation	Principles of Consolidation— The Consolidated Financial Statements include the accounts of Wesbanco and those entities in which Wesbanco has a controlling financial interest. All intercompany balances and transactions have been eliminated in consolidation. Wesbanco determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity. A voting interest entity is an entity in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make financial and operating decisions. Wesbanco consolidates voting interest entities in which it owns all, or at least a majority (generally, greater than 50%) of the voting interest.
Business Combinations	Business Combinations— Business combinations are accounted for by applying the acquisition method. As of acquisition date, the identifiable assets acquired and liabilities assumed are measured at fair value and recognized separately from goodwill. Results of operations of the acquired entities are included in the consolidated statement of income from the date of acquisition.
Variable Interest Entities	Variable Interest Entities— Variable interest entities (“VIE”) are entities that in general either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. Wesbanco uses VIEs in various legal forms to conduct normal business activities. Wesbanco reviews the structure and activities of VIEs for possible consolidation. A controlling financial interest in a VIE is present when an enterprise has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits of the VIE that could potentially be significant to the VIE. A VIE often holds financial assets, including loans or receivables, real estate or other property. The company with a controlling financial interest, known as the primary beneficiary, is required to consolidate the VIE. Wesbanco has eleven wholly-owned trust subsidiaries (collectively, the “Trusts”), for which it does not have the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance nor the obligation to absorb losses or the right to receive a benefits from the VIE that could be potentially significant to the VIE. Accordingly, the Trusts and their net assets are not included in the Consolidated Financial Statements. However, the junior subordinated deferrable interest debentures issued by Wesbanco to the Trusts (refer to Note 11, “Subordinated Debt and Junior Subordinated Debt”) and the common stock issued by the Trusts is included in the Consolidated Balance Sheets. Wesbanco also owns non-controlling variable interests in certain limited partnerships for which it does not have the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance nor the obligation to absorb losses or the right to receive a benefit from the VIE that could be potentially significant to the VIE. These VIEs are not consolidated into Wesbanco’s financial statements because Wesbanco is not considered the primary beneficiary. These investments are accounted for using the equity method of accounting and are included in other assets in the Consolidated Balance Sheets. Refer to Note 8, “Investments in Limited Partnerships” for further detail.
Revenue Recognition	Revenue Recognition— Interest and dividend income, loan fees, trust fees, fees and charges on deposit accounts, insurance commissions and other ancillary income related to the Bank’s deposits, lending and other activities, as well as income at Wesbanco’s other subsidiary companies, are accrued as contractually earned. Refer to Note 14, “Revenue Recognition” for further detail.
Cash and Cash Equivalents	Cash and Cash Equivalents— Cash and cash equivalents include cash and due from banks, due from banks – interest bearing and federal funds sold. Generally, federal funds are sold for one-day periods.
Securities	Securities— Equity securities: Equity securities, which include investments in various mutual funds held in grantor trusts formed in connection with the Company’s deferred compensation plan, are reported at fair value with the gains and losses included in non-interest income. Available-for-sale debt securities: Debt securities not classified as held-to-maturity are classified as available-for-sale. These securities may be sold at any time based upon management’s assessment of changes in economic or financial market conditions, interest rate or prepayment risks, liquidity considerations and other factors. These securities are stated at fair value, with the fair value adjustment, net of tax, reported as a separate component of accumulated other comprehensive income. Held-to-maturity debt securities: Securities that are purchased with the positive intent and ability to be held until their maturity are stated at cost and adjusted for amortization of premiums and accretion of discounts. Transfers of debt securities into the held-to-maturity category from the available-for-sale category are made at fair value at the date of transfer. The unrealized gain or loss at the date of transfer is retained in other comprehensive income and in the carrying value of the held-to-maturity securities. Such amounts are amortized over the remaining life of the security. Certain securities with less than 15% of their original purchase price remaining or that have experienced measurable credit deterioration may be sold. Cost method investments: Securities that do not have readily determinable fair values and for which Wesbanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of Federal Home Loan Bank (“FHLB”) stock and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable. Securities acquired in acquisitions are recorded at fair value with the premium or discount derived from the fair market value adjustment recognized into interest income on a level yield basis over the remaining life of the security. Gains and losses: Net realized gains and losses on sales of securities are included in non-interest income. The cost of securities sold is based on the specific identification method. The gain or loss is determined as of the trade date. Unrealized gains and losses on available-for-sale securities are recorded through other comprehensive income. Amortization and accretion: Generally, premiums are amortized to call date and discounts are accreted to maturity, on a level yield basis. Current expected credit losses (“CECL”): The corporate and municipal bonds in Wesbanco’s held-to-maturity debt portfolio are analyzed quarterly for CECL. Wesbanco uses a database of historical financials of all corporate and municipal issuers and actual historic default and recovery rates on rated and non-rated transactions to estimate CECL on an individual security basis. The CECL calculated amount is adjusted quarterly and is recorded in an allowance for expected credit losses on the balance sheet that is deducted from the amortized cost basis of the held-to-maturity portfolio as a contra asset, with the losses recorded on the income statement within the provision for credit losses. Because Wesbanco’s held-to-maturity investments in mortgage-backed securities and collateralized mortgage obligations are all either issued by a direct governmental entity or a government-sponsored entity, there is no historical evidence supporting the establishment of a CECL reserve; therefore, Wesbanco has estimated these losses at zero, and will monitor this assumption in the future for any economical or governmental policies that could affect this assumption. Available-for-sale debt security impairment: An available-for-sale debt security is considered impaired if its fair value is less than its amortized cost basis. If Wesbanco intends to sell or will be required to sell the investment prior to recovery of cost, the entire impairment will be recognized immediately in the Consolidated Statements of Income. If Wesbanco does not intend to sell, nor is it more likely than not that it will be required to sell, impaired securities prior to the recovery of their cost, a review is conducted each quarter to determine if any portion of the impairment is due to credit losses. In estimating credit losses, Wesbanco first considers the financial condition and near-term prospects of the issuer, evaluating any credit downgrades or other indicators of a potential credit problem, the type of security, either fixed or equity, and the receipt of principal and interest according to the contractual terms. If there are no indications that the impairment is credit-related, the impairment is recognized in other comprehensive income in the Consolidated Balance Sheet. If the impairment is considered to be credit-related based on management’s review of the various factors that indicate credit impairment, the amount of credit impairment is calculated using the present value of future expected cash flows. If the present value of future expected cash flows is less than the amortized cost basis of the security, a credit loss exists and an allowance for expected credit losses is recorded, limited by the total unrealized loss on the security, and is recognized in the Consolidated Statements of Income. The non-credit portion is calculated as the difference between the total unrealized loss and the credit portion of that loss and is recognized in other comprehensive income.
Loans and Loans Held for Sale	Loans and Loans Held for Sale — Loans originated by Wesbanco are reported at the principal amount outstanding, net of unearned income including credit valuation adjustments, unamortized deferred loan fee income and loan origination costs. Interest is accrued as earned on loans except where doubt exists as to collectability, in which case accrual of income is discontinued. Loans originated and intended for sale are carried, in aggregate, at their estimated market value, as Wesbanco elected the fair value option on October 1, 2017. Loan origination fees and direct costs are deferred and accreted or amortized into interest income, as an adjustment to the yield, over the life of the loan using the level yield method, or an approximation thereof. When a loan is paid off, the remaining unaccreted or unamortized net origination fees or costs are immediately recognized into income. Loans are generally placed on non-accrual when they are 90 days past due, unless the loan is well-secured and in the process of collection. Loans may be returned to accrual status when a borrower has resumed paying principal and interest for a sustained period of at least six months and Wesbanco is reasonably assured of collecting the remaining contractual principal and interest. Loans are returned to accrual status at an amount equal to the principal balance of the loan at the time of non-accrual status less any payments applied to principal during the non-accrual period. Loans are reported as a troubled debt restructuring when Wesbanco, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. Refer to the “Troubled Debt Restructurings” policy below for additional detail. A loan is considered non-performing, based on current information and events, if it is probable that Wesbanco will be unable to collect the payments of principal and interest when due according to the original contractual terms of the loan agreement. Non-performing loans include all non-accrual loans and troubled debt restructurings. Wesbanco recognizes interest income on non-accrual loans on the cash basis only if recovery of principal is reasonably assured. Consumer loans are charged down to the net realizable value at 120 days past due for closed-end loans and 180 days past due for open-end revolving lines of credit. Residential real estate loans are charged down to the net realizable value of the collateral at 180 days past due. Commercial loans are charged down to the net realizable value when it is determined that Wesbanco will be unable to collect the principal amount in full. Loans are reclassified to other assets at the net realizable value when foreclosure or repossession of the collateral occurs. Refer to the “Other Real Estate Owned and Repossessed Assets” policy below for additional detail. On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") was signed into law, which, in part, established a loan program administered through the U.S. Small Business Administration ("SBA"), referred to as the Paycheck Protection Program ("PPP"). Under the PPP, small businesses, sole proprietorships, independent contractors, non-profit organizations and self-employed individuals could apply for loans from existing SBA lenders and other approved regulated lenders that enrolled in the program, subject to numerous limitations and eligibility criteria. Wesbanco has participated as a lender in the PPP program. All loans have a 1% interest rate and Wesbanco earns a fee that is based upon a tiered schedule corresponding with the amount of the loan to the borrower, which is deferred and recognized over the life of the loan. Based upon the borrower meeting certain criteria as defined by the CARES act, the loan may be forgiven by the SBA. Wesbanco reports these loans at their principal amount outstanding, net of unearned income, unamortized deferred loan fee income and loan origination costs. Interest is accrued as earned and loan origination fees and direct costs are deferred and accreted or amortized into interest income, as an adjustment to the yield, over the life of the loan using the level yield method, or an approximation thereof. When a PPP loan is paid off or forgiven by the SBA, the remaining unaccreted or unamortized net origination fees or costs are immediately recognized into income. On December 27, 2020, the Economic Aid to Hard-Hit Small Businesses, Nonprofits and Venues Act (“Economic Aid Act”) was signed into law in response to the continuing effects of the pandemic on the economy and provided for extensions and amendments to many features of the CARES Act. In particular, the Economic Aid Act further reauthorized PPP lending, providing for a new pool of available funds under the PPP through March 31, 2021, and among other things, modified the provisions related to making PPP loans and the forgiveness of such loans. The Economic Aid Act also authorized second draw PPP loans for borrowers that previously received a PPP loan under CARES Act provisions, subject to certain conditions.
Troubled Debt Restructurings ("TDR")	Troubled Debt Restructurings (“TDR”)— A restructuring of a loan constitutes a TDR if the creditor, for economic or legal reasons related to the debtor's financial difficulties, grants a concession to the debtor that it would not otherwise consider. The determination of whether a concession has been granted includes an evaluation of the debtor’s ability to access funds at a market rate for debt with similar risk characteristics and among other things, the significance of the modification relative to unpaid principal or collateral value of the debt, and/or the significance of a delay in the timing of payments relative to the frequency of payments, original maturity date, or the expected duration of the loan. The most common concessions granted generally include one or more modifications to the terms of the debt such as a reduction in the interest rate below the prevailing market rate for the remaining life of the debt, an extension of the maturity date at an interest rate lower than the prevailing market rate for new debt with similar risk, or reduction of the unpaid principal or interest. Additionally, all consumer bankruptcies are considered TDR; all TDRs are considered nonperforming loans. When determining whether a debtor is experiencing financial difficulties, consideration is given to any known default on any of its debt or whether it is probable that the debtor would be in payment default in the foreseeable future without the modification. Other indicators of financial difficulty include whether the debtor has declared or is in the process of declaring bankruptcy, the debtor’s ability to continue as a going concern, or the debtor’s projected cash flow to service its debt (including principal & interest) in accordance with the contractual terms for the foreseeable future, without a modification. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of that collateral is considered in determining whether the principal will be paid. The restructuring of a loan does not increase the allowance or provision for credit losses unless the loan is extended or the loans are commercial loans that are individually evaluated for impairment, in which case a specific reserve is established pursuant to GAAP. Portfolio segment loss history is the primary factor for establishing the allowance for residential real estate, home equity and consumer TDRs. Non-accrual loans that are restructured remain on non-accrual, but may move to accrual status after they have performed according to the restructured terms for a period of time. TDRs on accrual status generally remain on accrual as long as they continue to perform in accordance with their modified terms. TDRs may also be placed on non-accrual if they do not perform in accordance with the restructured terms. Loans may be removed from TDR status after they have performed according to the renegotiated terms for a period of time if the interest rate under the modified terms is at or above market, is restructured or refinanced at market or if the loan returns to its original terms. Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows financial institutions the option to temporarily suspend certain requirements under U.S. GAAP related to TDRs for a limited period of time during the COVID-19 pandemic. On April 7, 2020, the joint federal regulatory agencies issued a statement, “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus (Revised)” (“Interagency Statement”), which further discusses loan modifications related to COVID-19. Wesbanco has extended up to a 180 day delay in loan principal and/or interest payments for customers affected by the COVID-19 pandemic. These customers must meet certain criteria, such as they were in good standing and not more than 30 days past due either as of December 31, 2019, or as of the implementation of the modification program under the Interagency Statement, as well as other requirements noted in the regulatory agencies’ revised statement. Based on the CARES Act provisions and the guidance noted above, Wesbanco does not classify the COVID-19 loan modifications as TDRs, nor are the customers considered past due with regards to their delayed payments to the extent they meet the criteria. Upon exiting the loan modification deferral program, the measurement of loan delinquency will resume where it left off upon entry into the program. On August 3, 2020, the joint federal regulatory agencies issued a statement, “Joint Statement on Additional Loan Accommodations Related to COVID-19”. This statement provides financial institutions with considerations for certain customers nearing the end of their COVID-19 loan deferral period noted above. As per this guidance and in accordance with the CARES Act noted above, Wesbanco developed a plan to assist certain customers with additional deferrals of principal and/or interest. This plan, relating to existing commercial loans in the hospitality sector, may provide certain relief to these portfolio loans if they meet certain criteria regarding the borrower, underlying property and potential guarantors / co-borrowers. If a loan were to meet the criteria, they would be eligible to have twelve months of interest payments deferred or three months of principal and interest payments plus nine months of interest-only payments. There are predetermined contractual re-evaluation triggers reviewed throughout the deferred period to determine if a borrower should return to a normal amortization schedule prior to the completion of the twelve month period. The Economic Aid Act further extends relief granted by the CARES Act for TDRs, initially slated to end on December 31, 2020, by one year to December 31, 2021.
Acquired Loans	Acquired Loans— Loans acquired in connection with acquisitions are recorded at their acquisition-date fair value with no carryover of related allowance for credit losses. Acquired loans are classified into two categories; purchased financial instruments with more than insignificant credit deterioration (“PCD”) loans, and loans with insignificant credit deterioration (“non-PCD”). PCD loans are defined as a loan or group of loans that have experienced more than insignificant credit deterioration since origination. Non-PCD loans will have an allowance established on acquisition date, which is recognized in the current period provision for credit losses. For PCD loans, an allowance is recognized on day 1 by adding it to the fair value of the loan, which is the “Day 1 amortized cost”. There is no credit loss expense recognized on PCD loans because the initial allowance is established by grossing-up the amortized cost of the PCD loan. Determining the fair value of the acquired loans involves estimating the principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Management considers a number of factors in evaluating the acquisition-date fair value including the remaining life of the acquired loans, delinquency status, estimated prepayments, payment options and other loan features, internal risk grade, estimated value of the underlying collateral and interest rate environment. PCD loans are accounted for in accordance with Accounting Standards Codification (“ASC”) 326-20, Financial Instruments – Credit Losses – Measure at Amortized Cost, if, at acquisition, the loan or pool of loans has experienced more-than-insignificant credit deterioration since origination. At acquisition, Wesbanco considers several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors include, but are not limited to, loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, the materiality of the credit and loans that have been previously modified in a troubled debt restructuring. Under ASC 326-20, a group of loans with similar risk characteristics can be assessed to determine if the pool of loans is PCD. However, if a loan does not have similar risk characteristics as any other acquired loan, the loan is individually assessed to determine if it is PCD. In addition, the initial allowance related to acquired loans can be estimated for a pool of loans if the loans have similar risk characteristics. Even if the loans were individually assessed to determine if they were PCD, they can be grouped together in the initial allowance calculation if they share similar risk characteristics. Since Wesbanco uses the discounted cash flow (DCF) approach, the initial allowance calculation for PCD loans is calculated as the expected contractual cash shortfalls, discounted at the rate that equals the net present value of estimated future cash flows expected to be collected with the purchase price of the loan(s). If a PCD loan has an unfunded commitment at acquisition, the initial allowance for credit losses calculation reflects only the expected credit losses associated with the funded portion of the PCD loan. Expected credit losses associated with the unfunded commitment are included in the initial measurement of the commitment. For PCD loans, the non-credit discount or premium is allocated to individual loans as determined by the difference between the loan’s amortized cost basis and the unpaid principal balance. The non-credit premium or discount is recognized into interest income on a level yield basis over the remaining expected life of the loan. For non-PCD loans, the interest and credit discount or premium is allocated to individual loans as determined by the difference between the loan’s amortized cost basis and the unpaid principal balance. The premium or discount is recognized into interest income on a level yield basis over the remaining expected life of the loan.
Allowance for Credit Losses	Allowance for Credit Losses— The allowance for credit losses specific to loans under CECL, which Wesbanco implemented on January 1, 2020, reduces the loan portfolio to the net amount expected to be collected, representing the lifetime expected losses at the initial origination date. Similarly, an allowance for unfunded loan commitments, which is recorded in other liabilities, represents expected losses on unfunded commitments. Fluctuations in the allowance for credit losses specific to loans, the allowance for unfunded loan commitments, and the allowance for held-to-maturity debt securities are recognized in the provision for credit losses on the consolidated statement of operations. The allowance incorporates forward-looking information and applies a reversion methodology beyond the reasonable and supportable forecast. The allowance is increased by a provision charged to operating expense and reduced by charge-offs, net of recoveries. Management evaluates the appropriateness of the allowance at least quarterly. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant change from period to period. The allowance for credit loss calculation specific to loans is based on the loan’s amortized cost basis, which is comprised of the unpaid principal balance of the loan, deferred loan fees (costs) and acquired premium (discount) minus any write-downs. Wesbanco made an accounting policy election to exclude accrued interest from the measurement of the allowance for credit losses because the Company has a robust policy in place to reverse or write-off accrued interest when a loan is placed on non-accrual, and also Wesbanco made an accounting policy election to reverse accrued interest deemed uncollectible as a reversal of interest income. However, Wesbanco is reserving, as part of the allowance for credit losses, for accrued interest on loan modifications under the CARES Act due to the nature and timing of these deferrals. The allowance for credit losses reflects the risk of loss on the loan portfolio. To appropriately measure expected credit losses, management disaggregates the loan portfolio into pools of similar risk characteristics. The Company utilizes the probability of default (“PD”) / loss given default (“LGD”) approach to calculate the expected loss for each segment, which is then discounted to net present value. PD is the probability the asset will default within a given timeframe and LGD is the percentage of the assets not expected to be collected due to default. The primary macroeconomic drivers of the quantitative model include forecasts of national unemployment and interest rate spreads. Management relies on macroeconomic forecasts obtained from various reputable sources, which may include the Federal Open Market Committee (FOMC) forecast and other publicly available forecasts from well recognized, leading economists. These forecasts can range from one to two years, depending upon the facts and circumstances of the current state of the economy, portfolio segment and management’s judgement of what can be reasonably supported. The model reversion period ranges from one to three years. The allowance for credit losses is calculated over the loan’s contractual life. For term loans, the contractual life is calculated based on the maturity date. For commercial and industrial (“C&I”) revolving loans with no stated maturity date, the contractual life is calculated based on the internal review date. For all other revolving loans, the contractual life is based on either the estimated maturity date or a default date. The contractual term does not include expected extensions, renewals or modifications unless management has a reasonable expectation as of the reporting period that Wesbanco will execute a TDR with the borrower. Management assumes a loan will become a TDR if a consumer loan has matured, has a principal balance, and has previously been partially charged-off. This assumption extends the maturity of these loans to the six months beyond maturity date. The loan portfolio is segmented based on the risk profiles of the loans. Commercial loans are segmented between commercial real estate (“CRE”), which are collateralized by real estate, and C&I, which are typically utilized for general business purposes. CRE is further segmented between land and construction (“LCD”) and improved property, which are generally loans to purchase or refinance owner occupied or non-owner occupied investment properties. LCD loans have a unique risk that the developer or builder may not complete the project or not complete it on time or within budget. Improved property loans are reviewed for risk based on the underlying real estate property such as rental or owner income, appraisal value and other current lease terms, which affect debt service coverage and loan to value. Retail loans are a homogenous group, generally consisting of standardized products that are smaller in amount and distributed over a large number of individual borrowers. The group is segmented into three categories – residential real estate, HELOC and consumer. Contractual terms are adjusted for estimated prepayments to arrive at expected cash flows. Wesbanco models term loans with an annualized “prepayment” rate. When Wesbanco has a specific expectation of differing payment behavior for a given loan, the loan may be evaluated individually. For revolving loans that do not have a principal payment schedule, a curtailment rate is factored into the cash flow. The evaluation also considers qualitative factors such as economic trends and conditions, which includes levels of regional unemployment, real estate values and the impact on specific industries and geographical markets, changes in lending policies and underwriting standards, delinquency and other credit quality trends, concentrations of credit risk, if any, the results of internal loan reviews and examinations by bank regulatory agencies pertaining to the allowance for credit losses. Management relies on observable data from internal and external sources to the extent it is available to evaluate each of these factors and adjusts the model’s quantitative results to reflect the impact these factors may have on probable losses in the portfolio. As a result of the COVID-19 pandemic, there is concern within the banking industry that deferrals are delaying the overall impact of COVID-19 on the loan portfolio. As such, temporary COVID-19 qualitative factors have been incorporated to recognize increased risk within the portfolio that is not captured by the quantitative output including COVID-19 pandemic factors related to the transient credit risk not covered by the traditional allowance process, adjusted to Wesbanco’s regional footprint, deferred interest on modified loans, and hospitality industry concentration. Commercial loans, including CRE and C&I, greater than $1 million in balance that are reported as non-accrual, troubled debt restructuring or that have other unique characteristics are tested individually for estimated credit losses. Specific reserves are established when appropriate for such loans based on the net present value of expected future cash flows of the loan or the estimated realizable value of the collateral, if any. Management may also adjust its assumptions to account for differences between expected and actual losses from period to period. The variability of management’s assumptions could alter the level of the allowance for credit losses and may have a material impact on future results of operations and financial condition. The loss estimation models and methods used to determine the allowance for credit losses are continually refined and enhanced. For periods ended December 31, 2019 and prior, which preceded the implementation of CECL, the allowance for credit losses represented management’s estimate of probable losses inherent in the loan portfolio and in future advances against loan commitments. Determining the amount of the allowance required significant judgment about the collectability of loans and the factors that deserved consideration in estimating probable credit losses. The allowance was increased by a provision charged to operating expense and reduced by charge-offs, net of recoveries. Management evaluated the appropriateness of the allowance at least quarterly. This evaluation was inherently subjective as it required material estimates that may be susceptible to significant change from period to period. The evaluation included an assessment of quantitative factors such as actual loss experience within each category of loans and testing of certain commercial loans for impairment. The evaluation also considered qualitative factors such as economic trends and conditions, which included levels of unemployment, real estate values and the impact on specific industries and geographical markets, changes in lending policies and underwriting standards, delinquency and other credit quality trends, concentrations of credit risk, if any, the results of internal loan reviews and examinations by bank regulatory agencies, the volatility of historical loss rates and the velocity of changes in historical loss rates pertaining to the allowance for credit losses. Management relied on observable data from internal and external sources to the extent it was available to evaluate each of these factors and adjusted the actual historical loss rates to reflect the impact these factors may have on probable losses in the portfolio. Commercial real estate and commercial and industrial loans greater than $1 million that were reported as non-accrual or as a troubled debt restructuring were tested individually for impairment. Specific reserves were established when appropriate for such loans based on the present value of expected future cash flows of the loan or the estimated realizable value of the collateral, if any. General reserves were established for loans that were not individually tested for impairment based on historical loss rates adjusted for the impact of the qualitative factors discussed above. Historical loss rates for commercial real estate and commercial and industrial loans were determined for each internal risk grade or group of pass grades using a migration analysis. Residential real estate, home equity and consumer loans were not risk graded, so historical loss rates were utilized to determine the total of each category of loans. Historical loss rates for deposit account overdrafts were based on actual losses in relation to average overdrafts for the period. Management also qualitatively adjusted its assumptions to account for differences between estimated and actual incurred losses from period to period. The variability of management’s assumptions could have altered the level of the allowance for credit losses and may have had a material impact on future results of operations and financial condition. The loss estimation models and methods used to determine the allowance for credit losses were continually refined and enhanced.
Premises and Equipment	Premises and Equipment— Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized over the shorter of the estimated economic useful lives of the leased assets or the remaining terms of the underlying leases. Useful lives range from 3 to 10 years for furniture and equipment, 15 to 39 years for buildings and building improvements, and 15 years for land improvements. Maintenance and repairs are expensed as incurred while major improvements that extend the useful life of an asset are capitalized and depreciated over the estimated remaining useful life of the asset. Operating leases are recorded as a right of use (“ROU”) asset and operating lease liability, included in premises and equipment, net and other liabilities, respectively. Operating lease ROU assets represent the right to use an underlying asset during the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents our incremental borrowing rate at the lease commencement date. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term, and is recorded primarily in net occupancy expense in the consolidated statements of comprehensive income.
Other Real Estate Owned and Repossessed Assets	Other Real Estate Owned and Repossessed Assets— Other real estate owned and repossessed assets, which are considered available-for-sale and are reported in other assets, are carried at the lower of cost or their estimated current fair value, less estimated costs to sell. Other real estate owned consists primarily of properties acquired through, or in lieu of, foreclosure. Repossessed collateral primarily consists of automobiles and other types of collateral acquired to satisfy defaulted consumer loans. Subsequent declines in fair value, if any, income and expense associated with the management of the collateral, and gains or losses on the disposition of these assets are recognized in the Consolidated Statements of Income in non-interest income. Refer to Note 14, “Revenue Recognition” for further detail.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets— Wesbanco accounts for business combinations using the acquisition method of accounting. Accordingly, the identifiable assets acquired, the liabilities assumed, and any non-controlling interest of an acquired business are recorded at their estimated fair values as of the date of acquisition with any excess of the cost of the acquisition over the fair value recorded as goodwill. Other intangible assets represent purchased assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability. Goodwill is not amortized but is evaluated for impairment annually, or more often if events or circumstances indicate it may be impaired. Finite-lived intangible assets, which consist primarily of core deposit and customer list intangibles (long-term customer-relationship intangible assets) are amortized using straight-line and accelerated methods over their weighted-average estimated useful lives, ranging from ten to sixteen years in total, and are tested for impairment whenever events or circumstances indicate that their carrying amount may not be recoverable. Non-compete agreements are recognized in other assets on the balance sheet and are amortized on a straight-line basis over the life of the respective agreements, ranging from one to four years. Goodwill is evaluated for impairment by either assessing qualitative factors to determine whether it is necessary to perform the goodwill impairment test, or Wesbanco may elect to perform a quantitative goodwill impairment test. Under the qualitative assessment, Wesbanco assesses qualitative factors to determine whether it is more likely than not that the fair value of its reporting units are less than their carrying amounts, including goodwill. If it is more likely than not, the goodwill impairment test is used to identify potential goodwill impairment and measure the amount of a goodwill impairment loss to be recognized, if any. The estimated fair value of each reporting unit is compared to its carrying value, including goodwill. If the estimated fair value of a reporting unit exceeds its carrying amount, the goodwill of that reporting unit is not considered impaired, and no impairment loss is recognized. However, if the carrying amount of the reporting unit exceeds its fair value, an impairment loss is recognized based on the excess of a reporting unit’s carrying value over its fair value. Intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. An impairment loss is recognized when the carrying amount of an intangible asset with a finite useful life is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and the fair value of the asset. Wesbanco does not have any indefinite-lived intangible assets.
Bank-Owned Life Insurance	Bank-Owned Life Insurance— Wesbanco has purchased life insurance policies on certain executive and other officers. Wesbanco receives the cash surrender value of each policy upon its termination or benefits are payable upon the death of the insured. These policies are recorded in the Consolidated Balance Sheets at their net cash surrender value. Changes in net cash surrender value are recognized in non-interest income in the Consolidated Statements of Income. Adjustments to cash surrender value and death benefits received, if recognized as income, are currently tax-exempt.
Interest Rate Lock Commitments	Interest Rate Lock Commitments— In order to attract potential home borrowers, Wesbanco offers interest rate lock commitments (“IRLC”) to such potential borrowers. IRLC are generally for sixty days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some IRLC expire prior to the funding of the related loan. For IRLC issued in connection with potential loans intended for sale, which consist primarily of originated longer-term fixed rate residential home mortgage loans that qualify for secondary market sale, the Bank enters into positions of forward month mortgage-backed securities to be announced (“TBA”) contracts on a mandatory basis or on a one-to-one forward sales contract on a best efforts basis. A mortgage loan sold on a mandatory basis is sold to the secondary market when the mortgage loan is funded. Wesbanco enters into TBA contracts in order to control interest rate risk during the period between the IRLC and the sale of the mortgage loan. The IRLC is executed between the mortgagee and Wesbanco, and the forward TBA contract is executed between Wesbanco and a counterparty. Both the IRLC and the forward TBA contract are considered derivatives. A mortgage loan sold on a best efforts basis is locked into a forward sales contract on the same day as the IRLC to control interest rate risk during the period between the IRLC and the sale of the mortgage loan. The IRLC is executed between the mortgagee and Wesbanco, and the forward sales contract is executed between Wesbanco and a counterparty. Both the IRLC and the forward sales contract are considered derivatives. Both types of derivatives are recorded at fair value and are not designated in a qualified hedged accounting program. The changes in fair value are recorded in current earnings within mortgage banking income in the Consolidated Statements of Income. The fair value of IRLC is the gain or loss that would be realized on the underlying loans assuming exercise of the commitments under current market rates versus the rate incorporated in the commitments, taking into consideration loans cancelled prior to closing. The fair value of forward sales contracts is based on quoted market prices. Since loans typically close before receipt of funding from an investor, they are accounted for at fair value as “Loans Held for Sale” in the Consolidated Balance Sheets.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities— Wesbanco records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether Wesbanco has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Wesbanco enters into back-to-back interest rate swaps with commercial banking customers and then with counterparties for the offsetting interest rate swap. Currently, none of Wesbanco’s derivatives are designated in qualifying hedging relationships, as the derivatives are not used to manage risks within Wesbanco’s assets or liabilities. As such, all changes in fair value of Wesbanco’s derivatives are recognized directly in earnings.
Income Taxes	Income Taxes— The provision for income taxes included in the Consolidated Statements of Income includes both federal and state income taxes and is based on income in the financial statements, rather than amounts reported on Wesbanco’s income tax returns. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases at which rates they are expected to turnaround. A test of the anticipated realizability of deferred tax assets is performed at least annually.
Fair Value	Fair Value— Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value measurements are not adjusted for transaction costs. The ASC also establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The three levels of the fair value hierarchy are described below: Level 1—Quoted prices in active markets for the same security that are accessible at the measurement date for identical, unrestricted assets or liabilities; Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market; Level 3—Valuation is generated from model-based techniques where one or more significant assumptions are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of discounted cash flow models and similar techniques. A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
Earnings Per Common Share	Earnings Per Common Share— Basic earnings per common share (“EPS”) is calculated by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period. For diluted EPS, the weighted-average number of shares for the period is increased by the number of shares, which would be issued assuming the exercise of in-the-money common stock options and any outstanding warrants. Time-based restricted stock shares are recorded as issued and outstanding upon their grant, rather than upon vesting, and therefore are included in the weighted-average shares outstanding due to voting rights granted at the time restricted stock is granted. Performance and market-based restricted stock shares are recorded as issued and outstanding upon their achieving the required performance or market factors. These restricted shares are included in the number of shares outstanding for diluted EPS if their performance or market factors are expected to be achieved as of the reporting date.
Trust Assets	Trust Assets— Assets held by the Bank in fiduciary or agency capacities for its customers are not included as assets in the Consolidated Balance Sheets. Certain money market trust assets are held on deposit at the Bank and are accounted for as such.
Stock-Based Compensation	Stock-Based Compensation— Stock-based compensation awards granted, comprised of stock options, performance and time-based restricted stock, and total shareholder return (“TSR”) awards are valued at fair value and compensation cost is recognized on a straight-line basis over the requisite service or performance period of each award. For service-based awards with graded vesting schedules, compensation expense is divided among the vesting periods with each separately vested portion of the award recognized in compensation expense on a straight-line basis over the requisite service period. For performance-based awards and TSR awards, compensation expense is recognized evenly over the performance period, based on the probability of the achievements of the performance or market conditions set forth in the plans. Upon adoption of Accounting Standards Update (“ASU”) 2016-09, “Compensation-Stock Compensation (Topic 718)”, Wesbanco recognizes forfeitures as they occur rather than estimating them over the life of the award.
Defined Benefit Pension Plan	Defined Benefit Pension Plan— Wesbanco recognizes in the statement of financial position an asset for the plan’s overfunded status or a liability for the plan’s underfunded status. Wesbanco recognizes fluctuations in the funded status in the year in which the changes occur through other comprehensive income. Plan assets are determined based on fair value generally representing observable market prices. The projected benefit obligation is determined based on the present value of projected benefit distributions at an assumed discount rate. The discount rate utilized is based on a fitted yield curve approach whereby the yield curve compares the expected stream of future benefit payments for the plan to high quality corporate bonds available in the marketplace to determine an equivalent discount rate. Periodic pension expense includes service costs, interest costs based on an assumed discount rate, an expected return on plan assets based on an actuarially-derived market-related value, an assumed rate of annual compensation increase, and amortization or accretion of actuarial gains and losses as well as other actuarial assumptions. The service cost component is recognized in salaries and wages and the remaining costs are recognized in employee benefits within the Company’s Consolidated Statement of Income. Wesbanco utilizes a full yield curve approach in the estimation of service and interest components by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. The plan has been closed to new entrants since August 2007; however, benefits are still earned for those plan participants with continuing employment after August 2007. Refer to Note 13, “Employee Benefit Plans” for further detail.
Post-retirement Medical Benefit Plan	Post-retirement Medical Benefit Plan— Wesbanco acquired a non-qualified supplemental retirement plan for certain key employees from Farmers Capital Bank Corp. (“FFKT”). The Plan provides lifetime medical and dental benefits upon retirement for certain employees meeting the eligibility requirement, which were amended by Wesbanco upon acquisition. Wesbanco recognizes a liability for the projected benefit obligation in the Consolidated Balance Sheets in other liabilities as this plan is unfunded until period payments are made. Wesbanco recognizes fluctuations in the projected benefit obligation through other comprehensive income. The projected benefit obligation is based on the present value of projected medical and dental obligations at an assumed discount rate. Periodic benefit expense includes service cost, interest cost based on an assumed discount rate, and amortization or accretion of actuarial gains and losses, as well as other actuarial assumptions. Refer to Note 13, “Employee Benefit Plans” for further detail.
Recent accounting pronouncements	Recent accounting pronouncements—The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) as noted below. ASU 2020-04 Reference Rate Reform (Topic 848) In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848)”. Due to the potential discontinuance of the London Interbank Offered Rate (LIBOR), regulators have undertaken reference rate initiatives to identify alternative reference rates that are more observable or transaction based and less susceptible to manipulation. 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. Wesbanco is assessing the impact of adopting the new guidance on the consolidated financial statements on an ongoing basis with no material impacts expected at this time. ASU 2018-15 Intangibles – Goodwill and Other Internal-Use Software In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This ASU specifically aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. The ASU does not affect the accounting for the service element of a hosting arrangement that is a service contract. The guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. For Wesbanco, this update was effective January 1, 2020. The adoption of this pronouncement did not have a material impact on Wesbanco’s Consolidated Financial Statements. ASU 2018-14 Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20) In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans.” This ASU modifies Accounting Standards Codification (“ASC”) 715-20 to improve disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The guidance is effective for fiscal years ending after December 15, 2020. For Wesbanco, this update was effective January 1, 2020. The adoption of this pronouncement did not have a material impact on Wesbanco’s Consolidated Financial Statements. ASU 2018-13 Fair Value Measurement – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU modifies the disclosure objective paragraphs of ASC 820 to eliminate (1) “at a minimum” from the phrase “an entity shall disclose at a minimum” and (2) other similar “open ended” disclosure requirements to promote the appropriate exercise of discretion of entities. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. For Wesbanco, this update was effective January 1, 2020. The adoption of this pronouncement did not have a material impact on Wesbanco’s Consolidated Financial Statements. ASU 2016-13 Financial Instruments – Credit Losses (Topic 326) In September 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326),” which require entities to use a new forward-looking “expected loss” model also referred to as the current expected credit loss model (“CECL”) on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities measure credit losses in a manner similarly to current procedures, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose significantly more information, including information they use to track credit quality by year of origination for most financing receivables. In April 2019, the FASB issued ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging and Topic 825, Financial Instruments” and in May 2019 the FASB issued ASU 2019-05, “Financial Instruments – Credit Losses (Topic 326), Targeted Transition Relief. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for Wesbanco was effective January 1, 2020. In December 2018, the Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation (“FDIC”) and the Office of Comptroller of the Currency (“OCC”) approved a final rule to address changes to credit loss accounting under GAAP, including banking organizations’ adoption of the CECL methodology. The final rule provides banking organizations the option to phase-in, over a three-year period, the day-one adverse effects on regulatory capital that may result from the adoption of the new accounting standard. In response to the COVID-19 pandemic, the joint federal bank regulatory agencies issued an optional extension of the regulatory capital transition, which allows for a two-year delay and then a three-year transition period from January 1, 2022 through December 31, 2024. Under the interim final rule, the amount of adjustments to regulatory capital deferred until the phase-in period includes both the initial impact of our adoption of CECL at January 1, 2020 and 25% of subsequent changes in our allowance for credit losses during each quarter of the two-year period ended December 31, 2021, (collectively, the “CECL regulatory capital transition adjustment”). Wesbanco has elected to defer the impact of CECL on its regulatory capital for two years and then will phase-in the impact of the adoption of this standard on the regulatory capital calculations over the subsequent three-year period. Under CECL, acquired loans or pools of loans that have experienced more-than-insignificant credit deterioration are deemed to be PCD loans, and are grossed-up on day 1 by the initial credit estimate through the allowance as opposed to a reduction in the loan’s amortized cost. The credit mark on acquired loans deemed not to be PCD loans are reflected as a reduction in the loan’s amortized cost, with an allowance and corresponding provision for credit losses recorded in the first reporting period after acquisition through current period earnings, while the loan mark will accrete through interest income over the life of such loans. At acquisition, Wesbanco will consider several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors may include loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, materiality of the credit and loans that have been previously modified in a TDR. Upon adoption of this standard, acquired loans from prior acquisitions that met the guidelines under ASC 310-30 (formerly known as “purchased credit-impaired”) were reclassified as PCD loans. The accretable portion of the loan mark as of adoption date continues to accrete into interest income. However, the non-accretable portion of the loan mark was added to the allowance upon adoption, and any reversals of such mark will flow through the allowance in future periods. The loan mark on ASC 310-20 loans (“non-purchased credit-impaired”) from prior acquisitions continues to accrete through interest income over the life of such loans. Wesbanco began planning in 2016 for the implementation of CECL and completed parallel runs in 2019 to ensure the various forecasting and modeling assumptions were reasonable and supportable, including certain qualitative factors that were developed to estimate the initial current expected credit loss allowance. Wesbanco engaged a third-party to validate the data inputs and the models utilized in the CECL calculation. In addition, the Company prepared documentation of the accounting policy decisions, changes to the business processes and procedures, and the control environment under the adoption of this standard. The day 1 impact on the allowance for credit losses was $41.4 million, which included a $6.7 million adjustment for PCD loans and a $3.0 million adjustment related to loan commitments. The after-tax effect on retained earnings was $26.6 million as of January 1, 2020. The day 1 CECL calculation was derived from the selected assumption of a one-year reasonable and supportable forecast, which was obtained from a third-party vendor. After the forecast period, Wesbanco reverts back over a one year period to historical loss rates adjusting for prepayments and curtailments, to estimate losses over the remaining life of loans. The most sensitive assumptions include the length of the forecast and reversion periods, forecast of unemployment and interest rate spreads and prepayment speeds. See Note 5, “Loans and the Allowance for Credit Losses” for further detail. Wesbanco recognized an allowance for credit losses for held-to-maturity (“HTM”) debt securities of $0.2 million as of January 1, 2020 upon adoption of this standard. See Note 4, “Securities” for further detail.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Nature of Operations— Wesbanco, Inc. (“Wesbanco” or the “Company”) is a bank holding company offering a full range of financial services, including trust and investment services, mortgage banking, insurance and brokerage services. Wesbanco’s defined business segments are community banking and trust and investment services. As of December 31, 2020, Wesbanco’s banking subsidiary, Wesbanco Bank, Inc. (“Wesbanco Bank” or the “Bank”), headquartered in Wheeling, West Virginia, operates through 233 branches and 226 ATM machines in West Virginia, Ohio, western Pennsylvania, Kentucky, southern Indiana and Maryland. In addition, Wesbanco operates an insurance brokerage company, Wesbanco Insurance Services, Inc., and a full service broker/dealer, Wesbanco Securities, Inc.

Use of Estimates

Use of Estimates— The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Principles of Consolidation

Principles of Consolidation— The Consolidated Financial Statements include the accounts of Wesbanco and those entities in which Wesbanco has a controlling financial interest. All intercompany balances and transactions have been eliminated in consolidation.

Wesbanco determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity. A voting interest entity is an entity in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make financial and operating decisions. Wesbanco consolidates voting interest entities in which it owns all, or at least a majority (generally, greater than 50%) of the voting interest.

Business Combinations

Business Combinations— Business combinations are accounted for by applying the acquisition method. As of acquisition date, the identifiable assets acquired and liabilities assumed are measured at fair value and recognized separately from goodwill. Results of operations of the acquired entities are included in the consolidated statement of income from the date of acquisition.

Variable Interest Entities

Variable Interest Entities— Variable interest entities (“VIE”) are entities that in general either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. Wesbanco uses VIEs in various legal forms to conduct normal business activities. Wesbanco reviews the structure and activities of VIEs for possible consolidation.

A controlling financial interest in a VIE is present when an enterprise has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits of the VIE that could potentially be significant to the VIE. A VIE often holds financial assets, including loans or receivables, real estate or other property. The company with a controlling financial interest, known as the primary beneficiary, is required to consolidate the VIE. Wesbanco has eleven wholly-owned trust subsidiaries (collectively, the “Trusts”), for which it does not have the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance nor the obligation to absorb losses or the right to receive a benefits from the VIE that could be potentially significant to the VIE. Accordingly, the Trusts and their net assets are not included in the Consolidated Financial Statements. However, the junior subordinated deferrable interest debentures issued by Wesbanco to the Trusts (refer to Note 11, “Subordinated Debt and Junior Subordinated Debt”) and the common stock issued by the Trusts is included in the Consolidated Balance Sheets. Wesbanco also owns non-controlling variable interests in certain limited partnerships for which it does not have the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance nor the obligation to absorb losses or the right to receive a benefit from the VIE that could be potentially significant to the VIE. These VIEs are not consolidated into Wesbanco’s financial statements because Wesbanco is not considered the primary beneficiary. These investments are accounted for using the equity method of accounting and are included in other assets in the Consolidated Balance Sheets. Refer to Note 8, “Investments in Limited Partnerships” for further detail.

Revenue Recognition

Revenue Recognition— Interest and dividend income, loan fees, trust fees, fees and charges on deposit accounts, insurance commissions and other ancillary income related to the Bank’s deposits, lending and other activities, as well as income at Wesbanco’s other subsidiary companies, are accrued as contractually earned. Refer to Note 14, “Revenue Recognition” for further detail.

Cash and Cash Equivalents

Cash and Cash Equivalents— Cash and cash equivalents include cash and due from banks, due from banks – interest bearing and federal funds sold. Generally, federal funds are sold for one-day periods.

Securities

Securities— Equity securities: Equity securities, which include investments in various mutual funds held in grantor trusts formed in connection with the Company’s deferred compensation plan, are reported at fair value with the gains and losses included in non-interest income.

Available-for-sale debt securities: Debt securities not classified as held-to-maturity are classified as available-for-sale. These securities may be sold at any time based upon management’s assessment of changes in economic or financial market conditions, interest rate or prepayment risks, liquidity considerations and other factors. These securities are stated at fair value, with the fair value adjustment, net of tax, reported as a separate component of accumulated other comprehensive income.

Held-to-maturity debt securities: Securities that are purchased with the positive intent and ability to be held until their maturity are stated at cost and adjusted for amortization of premiums and accretion of discounts. Transfers of debt securities into the held-to-maturity category from the available-for-sale category are made at fair value at the date of transfer. The unrealized gain or loss at the date of transfer is retained in other comprehensive income and in the carrying value of the held-to-maturity securities. Such amounts are amortized over the remaining life of the security. Certain securities with less than 15% of their original purchase price remaining or that have experienced measurable credit deterioration may be sold.

Cost method investments: Securities that do not have readily determinable fair values and for which Wesbanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of Federal Home Loan Bank (“FHLB”) stock and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable.

Securities acquired in acquisitions are recorded at fair value with the premium or discount derived from the fair market value adjustment recognized into interest income on a level yield basis over the remaining life of the security.

Gains and losses: Net realized gains and losses on sales of securities are included in non-interest income. The cost of securities sold is based on the specific identification method. The gain or loss is determined as of the trade date. Unrealized gains and losses on available-for-sale securities are recorded through other comprehensive income.

Amortization and accretion: Generally, premiums are amortized to call date and discounts are accreted to maturity, on a level yield basis.

Current expected credit losses (“CECL”): The corporate and municipal bonds in Wesbanco’s held-to-maturity debt portfolio are analyzed quarterly for CECL. Wesbanco uses a database of historical financials of all corporate and municipal issuers and actual historic default and recovery rates on rated and non-rated transactions to estimate CECL on an individual security basis. The CECL calculated amount is adjusted quarterly and is recorded in an allowance for expected credit losses on the balance sheet that is deducted from the amortized cost basis of the held-to-maturity portfolio as a contra asset, with the losses recorded on the income statement within the provision for credit losses. Because Wesbanco’s held-to-maturity investments in mortgage-backed securities and collateralized mortgage obligations are all either issued by a direct governmental entity or a government-sponsored entity, there is no historical evidence supporting the establishment of a CECL reserve; therefore, Wesbanco has estimated these losses at zero, and will monitor this assumption in the future for any economical or governmental policies that could affect this assumption.

Available-for-sale debt security impairment: An available-for-sale debt security is considered impaired if its fair value is less than its amortized cost basis. If Wesbanco intends to sell or will be required to sell the investment prior to recovery of cost, the entire impairment will be recognized immediately in the Consolidated Statements of Income. If Wesbanco does not intend to sell, nor is it more likely than not that it will be required to sell, impaired securities prior to the recovery of their cost, a review is conducted each quarter to determine if any portion of the impairment is due to credit losses. In estimating credit losses, Wesbanco first considers the financial condition and near-term prospects of the issuer, evaluating any credit downgrades or other indicators of a potential credit problem, the type of security, either fixed or equity, and the receipt of principal and interest according to the contractual terms. If there are no indications that the impairment is credit-related, the impairment is recognized in other comprehensive income in the Consolidated Balance Sheet. If the impairment is considered to be credit-related based on management’s review of the various factors that indicate credit impairment, the amount of credit impairment is calculated using the present value of future expected cash flows. If the present value of future expected cash flows is less than the amortized cost basis of the security, a credit loss exists and an allowance for expected credit losses is recorded, limited by the total unrealized loss on the security, and is recognized in the Consolidated Statements of Income. The non-credit portion is calculated as the difference between the total unrealized loss and the credit portion of that loss and is recognized in other comprehensive income.

Loans and Loans Held for Sale

Loans and Loans Held for Sale — Loans originated by Wesbanco are reported at the principal amount outstanding, net of unearned income including credit valuation adjustments, unamortized deferred loan fee income and loan origination costs. Interest is accrued as earned on loans except where doubt exists as to collectability, in which case accrual of income is discontinued. Loans originated and intended for sale are carried, in aggregate, at their estimated market value, as Wesbanco elected the fair value option on October 1, 2017.

Loan origination fees and direct costs are deferred and accreted or amortized into interest income, as an adjustment to the yield, over the life of the loan using the level yield method, or an approximation thereof. When a loan is paid off, the remaining unaccreted or unamortized net origination fees or costs are immediately recognized into income.

Loans are generally placed on non-accrual when they are 90 days past due, unless the loan is well-secured and in the process of collection. Loans may be returned to accrual status when a borrower has resumed paying principal and interest for a sustained period of at least six months and Wesbanco is reasonably assured of collecting the remaining contractual principal and interest. Loans are returned to accrual status at an amount equal to the principal balance of the loan at the time of non-accrual status less any payments applied to principal during the non-accrual period. Loans are reported as a troubled debt restructuring when Wesbanco, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. Refer to the “Troubled Debt Restructurings” policy below for additional detail.

A loan is considered non-performing, based on current information and events, if it is probable that Wesbanco will be unable to collect the payments of principal and interest when due according to the original contractual terms of the loan agreement. Non-performing loans include all non-accrual loans and troubled debt restructurings. Wesbanco recognizes interest income on non-accrual loans on the cash basis only if recovery of principal is reasonably assured.

Consumer loans are charged down to the net realizable value at 120 days past due for closed-end loans and 180 days past due for open-end revolving lines of credit. Residential real estate loans are charged down to the net realizable value of the collateral at 180 days past due. Commercial loans are charged down to the net realizable value when it is determined that Wesbanco will be unable to collect the principal amount in full. Loans are reclassified to other assets at the net realizable value when foreclosure or repossession of the collateral occurs. Refer to the “Other Real Estate Owned and Repossessed Assets” policy below for additional detail.

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") was signed into law, which, in part, established a loan program administered through the U.S. Small Business Administration ("SBA"), referred to as the Paycheck Protection Program ("PPP"). Under the PPP, small businesses, sole proprietorships, independent contractors, non-profit organizations and self-employed individuals could apply for loans from existing SBA lenders and other approved regulated lenders that enrolled in the program, subject to numerous limitations and eligibility criteria. Wesbanco has participated as a lender in the PPP program. All loans have a 1% interest rate and Wesbanco earns a fee that is based upon a tiered schedule corresponding with the amount of the loan to the borrower, which is deferred and recognized over the life of the loan. Based upon the borrower meeting certain criteria as defined by the CARES act, the loan may be forgiven by the SBA. Wesbanco reports these loans at their principal amount outstanding, net of unearned income, unamortized deferred loan fee income and loan origination costs. Interest is accrued as earned and loan origination fees and direct costs are deferred and accreted or amortized into interest income, as an adjustment to the yield, over the life of the loan using the level yield method, or an approximation thereof. When a PPP loan is paid off or forgiven by the SBA, the remaining unaccreted or unamortized net origination fees or costs are immediately recognized into income.

On December 27, 2020, the Economic Aid to Hard-Hit Small Businesses, Nonprofits and Venues Act (“Economic Aid Act”) was signed into law in response to the continuing effects of the pandemic on the economy and provided for extensions and amendments to many features of the CARES Act. In particular, the Economic Aid Act further reauthorized PPP lending, providing for a new pool of available funds under the PPP through March 31, 2021, and among other things, modified the provisions related to making PPP loans and the forgiveness of such loans. The Economic Aid Act also authorized second draw PPP loans for borrowers that previously received a PPP loan under CARES Act provisions, subject to certain conditions.

Troubled Debt Restructurings ("TDR")

Troubled Debt Restructurings (“TDR”)— A restructuring of a loan constitutes a TDR if the creditor, for economic or legal reasons related to the debtor's financial difficulties, grants a concession to the debtor that it would not otherwise consider. The determination of whether a concession has been granted includes an evaluation of the debtor’s ability to access funds at a market rate for debt with similar risk characteristics and among other things, the significance of the modification relative to unpaid principal or collateral value of the debt, and/or the significance of a delay in the timing of payments relative to the frequency of payments, original maturity date, or the expected duration of the loan. The most common concessions granted generally include one or more modifications to the terms of the debt such as a reduction in the interest rate below the prevailing market rate for the remaining life of the debt, an extension of the maturity date at an interest rate lower than the prevailing market rate for new debt with similar risk, or reduction of the unpaid principal or interest. Additionally, all consumer bankruptcies are considered TDR; all TDRs are considered nonperforming loans.

When determining whether a debtor is experiencing financial difficulties, consideration is given to any known default on any of its debt or whether it is probable that the debtor would be in payment default in the foreseeable future without the modification. Other indicators of financial difficulty include whether the debtor has declared or is in the process of declaring bankruptcy, the debtor’s ability to continue as a going concern, or the debtor’s projected cash flow to service its debt (including principal & interest) in accordance with the contractual terms for the foreseeable future, without a modification. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of that collateral is considered in determining whether the principal will be paid.

The restructuring of a loan does not increase the allowance or provision for credit losses unless the loan is extended or the loans are commercial loans that are individually evaluated for impairment, in which case a specific reserve is established pursuant to GAAP. Portfolio segment loss history is the primary factor for establishing the allowance for residential real estate, home equity and consumer TDRs.

Non-accrual loans that are restructured remain on non-accrual, but may move to accrual status after they have performed according to the restructured terms for a period of time. TDRs on accrual status generally remain on accrual as long as they continue to perform in accordance with their modified terms. TDRs may also be placed on non-accrual if they do not perform in accordance with the restructured terms. Loans may be removed from TDR status after they have performed according to the renegotiated terms for a period of time if the interest rate under the modified terms is at or above market, is restructured or refinanced at market or if the loan returns to its original terms.

Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows financial institutions the option to temporarily suspend certain requirements under U.S. GAAP related to TDRs for a limited period of time during the COVID-19 pandemic. On April 7, 2020, the joint federal regulatory agencies issued a statement, “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus (Revised)” (“Interagency Statement”), which further discusses loan modifications related to COVID-19. Wesbanco has extended up to a 180 day delay in loan principal and/or interest payments for

customers affected by the COVID-19 pandemic. These customers must meet certain criteria, such as they were in good standing and not more than 30 days past due either as of December 31, 2019, or as of the implementation of the modification program under the Interagency Statement, as well as other requirements noted in the regulatory agencies’ revised statement. Based on the CARES Act provisions and the guidance noted above, Wesbanco does not classify the COVID-19 loan modifications as TDRs, nor are the customers considered past due with regards to their delayed payments to the extent they meet the criteria. Upon exiting the loan modification deferral program, the measurement of loan delinquency will resume where it left off upon entry into the program.

On August 3, 2020, the joint federal regulatory agencies issued a statement, “Joint Statement on Additional Loan Accommodations Related to COVID-19”. This statement provides financial institutions with considerations for certain customers nearing the end of their COVID-19 loan deferral period noted above. As per this guidance and in accordance with the CARES Act noted above, Wesbanco developed a plan to assist certain customers with additional deferrals of principal and/or interest. This plan, relating to existing commercial loans in the hospitality sector, may provide certain relief to these portfolio loans if they meet certain criteria regarding the borrower, underlying property and potential guarantors / co-borrowers. If a loan were to meet the criteria, they would be eligible to have twelve months of interest payments deferred or three months of principal and interest payments plus nine months of interest-only payments. There are predetermined contractual re-evaluation triggers reviewed throughout the deferred period to determine if a borrower should return to a normal amortization schedule prior to the completion of the twelve month period. The Economic Aid Act further extends relief granted by the CARES Act for TDRs, initially slated to end on December 31, 2020, by one year to December 31, 2021.

Acquired Loans

Acquired Loans— Loans acquired in connection with acquisitions are recorded at their acquisition-date fair value with no carryover of related allowance for credit losses. Acquired loans are classified into two categories; purchased financial instruments with more than insignificant credit deterioration (“PCD”) loans, and loans with insignificant credit deterioration (“non-PCD”). PCD loans are defined as a loan or group of loans that have experienced more than insignificant credit deterioration since origination. Non-PCD loans will have an allowance established on acquisition date, which is recognized in the current period provision for credit losses. For PCD loans, an allowance is recognized on day 1 by adding it to the fair value of the loan, which is the “Day 1 amortized cost”. There is no credit loss expense recognized on PCD loans because the initial allowance is established by grossing-up the amortized cost of the PCD loan. Determining the fair value of the acquired loans involves estimating the principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. Management considers a number of factors in evaluating the acquisition-date fair value including the remaining life of the acquired loans, delinquency status, estimated prepayments, payment options and other loan features, internal risk grade, estimated value of the underlying collateral and interest rate environment.

PCD loans are accounted for in accordance with Accounting Standards Codification (“ASC”) 326-20, Financial Instruments – Credit Losses – Measure at Amortized Cost, if, at acquisition, the loan or pool of loans has experienced more-than-insignificant credit deterioration since origination. At acquisition, Wesbanco considers several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors include, but are not limited to, loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, the materiality of the credit and loans that have been previously modified in a troubled debt restructuring.

Under ASC 326-20, a group of loans with similar risk characteristics can be assessed to determine if the pool of loans is PCD. However, if a loan does not have similar risk characteristics as any other acquired loan, the loan is individually assessed to determine if it is PCD. In addition, the initial allowance related to acquired loans can be estimated for a pool of loans if the loans have similar risk characteristics. Even if the loans were individually assessed to determine if they were PCD, they can be grouped together in the initial allowance calculation if they share similar risk characteristics. Since Wesbanco uses the discounted cash flow (DCF) approach, the initial allowance calculation for PCD loans is calculated as the expected contractual cash shortfalls, discounted at the rate that equals the net present value of estimated future cash flows expected to be collected with the purchase price of the loan(s). If a PCD loan has an unfunded commitment at acquisition, the initial allowance for credit losses calculation reflects only the expected credit losses associated with the funded portion of the PCD loan. Expected credit losses associated with the unfunded commitment are included in the initial measurement of the commitment.

For PCD loans, the non-credit discount or premium is allocated to individual loans as determined by the difference between the loan’s amortized cost basis and the unpaid principal balance. The non-credit premium or discount is recognized into interest income on a level yield basis over the remaining expected life of the loan. For non-PCD loans, the interest and credit discount or premium is allocated to individual loans as determined by the difference between the loan’s amortized cost basis and the unpaid principal balance. The premium or discount is recognized into interest income on a level yield basis over the remaining expected life of the loan.

Allowance for Credit Losses

Allowance for Credit Losses— The allowance for credit losses specific to loans under CECL, which Wesbanco implemented on January 1, 2020, reduces the loan portfolio to the net amount expected to be collected, representing the lifetime expected losses at the initial origination date. Similarly, an allowance for unfunded loan commitments, which is recorded in other liabilities, represents expected losses on unfunded commitments. Fluctuations in the allowance for credit losses specific to loans, the allowance for unfunded loan commitments, and the allowance for held-to-maturity debt securities are recognized in the provision for credit losses on the consolidated statement of operations. The allowance incorporates forward-looking information and applies a reversion methodology beyond the reasonable and supportable forecast. The allowance is increased by a provision charged to operating expense and reduced by charge-offs, net of recoveries. Management evaluates the appropriateness of the allowance at least quarterly. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant change from period to period.

The allowance for credit loss calculation specific to loans is based on the loan’s amortized cost basis, which is comprised of the unpaid principal balance of the loan, deferred loan fees (costs) and acquired premium (discount) minus any write-downs. Wesbanco made an accounting policy election to exclude accrued interest from the measurement of the allowance for credit losses because the Company has a robust policy in place to reverse or write-off accrued interest when a loan is placed on non-accrual, and also Wesbanco made an accounting policy election to reverse accrued interest deemed uncollectible as a reversal of interest income. However, Wesbanco is reserving, as part of the allowance for credit losses, for accrued interest on loan modifications under the CARES Act due to the nature and timing of these deferrals.

The allowance for credit losses reflects the risk of loss on the loan portfolio. To appropriately measure expected credit losses, management disaggregates the loan portfolio into pools of similar risk characteristics. The Company utilizes the probability of default (“PD”) / loss given default (“LGD”) approach to calculate the expected loss for each segment, which is then discounted to net present value. PD is the probability the asset will default within a given timeframe and LGD is the percentage of the assets not expected to be collected due to default. The primary macroeconomic drivers of the quantitative model include forecasts of national unemployment and interest rate spreads. Management relies on macroeconomic forecasts obtained from various reputable sources, which may include the Federal Open Market Committee (FOMC) forecast and other publicly available forecasts from well recognized, leading economists. These forecasts can range from one to two years, depending upon the facts and circumstances of the current state of the economy, portfolio segment and management’s judgement of what can be reasonably supported. The model reversion period ranges from one to three years.

The allowance for credit losses is calculated over the loan’s contractual life. For term loans, the contractual life is calculated based on the maturity date. For commercial and industrial (“C&I”) revolving loans with no stated maturity date, the contractual life is calculated based on the internal review date. For all other revolving loans, the contractual life is based on either the estimated maturity date or a default date. The contractual term does not include expected extensions, renewals or modifications unless management has a reasonable expectation as of the reporting period that Wesbanco will execute a TDR with the borrower. Management assumes a loan will become a TDR if a consumer loan has matured, has a principal balance, and has previously been partially charged-off. This assumption extends the maturity of these loans to the six months beyond maturity date.

The loan portfolio is segmented based on the risk profiles of the loans. Commercial loans are segmented between commercial real estate (“CRE”), which are collateralized by real estate, and C&I, which are typically utilized for general business purposes. CRE is further segmented between land and construction (“LCD”) and improved property, which are generally loans to purchase or refinance owner occupied or non-owner occupied investment properties. LCD loans have a unique risk that the developer or builder may not complete the project or not complete it on time or within budget. Improved property loans are reviewed for risk based on the underlying real estate property such as rental or owner income, appraisal value and other current lease terms, which affect debt service coverage and loan to value. Retail loans are a homogenous group, generally consisting of standardized products that are smaller in amount and distributed over a large number of individual borrowers. The group is segmented into three categories – residential real estate, HELOC and consumer.

Contractual terms are adjusted for estimated prepayments to arrive at expected cash flows. Wesbanco models term loans with an annualized “prepayment” rate. When Wesbanco has a specific expectation of differing payment behavior for a given loan, the loan may be evaluated individually. For revolving loans that do not have a principal payment schedule, a curtailment rate is factored into the cash flow.

The evaluation also considers qualitative factors such as economic trends and conditions, which includes levels of regional unemployment, real estate values and the impact on specific industries and geographical markets, changes in lending policies and underwriting standards, delinquency and other credit quality trends, concentrations of credit risk, if any, the results of internal loan reviews and examinations by bank regulatory agencies pertaining to the allowance for credit losses. Management relies on observable data from internal and external sources to the extent it is available to evaluate each of these factors and adjusts the model’s quantitative results to reflect the impact these factors may have on probable losses in the portfolio. As a result of the COVID-19 pandemic, there is concern within the banking industry that deferrals are delaying the overall impact of COVID-19 on the loan portfolio. As such, temporary COVID-19 qualitative factors have been incorporated to recognize increased risk within the portfolio that is not captured by the quantitative output including COVID-19 pandemic factors related to the transient credit risk not covered by the traditional allowance process, adjusted to Wesbanco’s regional footprint, deferred interest on modified loans, and hospitality industry concentration.

Commercial loans, including CRE and C&I, greater than $1 million in balance that are reported as non-accrual, troubled debt restructuring or that have other unique characteristics are tested individually for estimated credit losses. Specific reserves are established when appropriate for such loans based on the net present value of expected future cash flows of the loan or the estimated realizable value of the collateral, if any.

Management may also adjust its assumptions to account for differences between expected and actual losses from period to period. The variability of management’s assumptions could alter the level of the allowance for credit losses and may have a material impact on future results of operations and financial condition. The loss estimation models and methods used to determine the allowance for credit losses are continually refined and enhanced.

For periods ended December 31, 2019 and prior, which preceded the implementation of CECL, the allowance for credit losses represented management’s estimate of probable losses inherent in the loan portfolio and in future advances against loan commitments. Determining the amount of the allowance required significant judgment about the collectability of loans and the factors that deserved consideration in estimating probable credit losses. The allowance was increased by a provision charged to operating expense and reduced by

charge-offs, net of recoveries. Management evaluated the appropriateness of the allowance at least quarterly. This evaluation was inherently subjective as it required material estimates that may be susceptible to significant change from period to period.

The evaluation included an assessment of quantitative factors such as actual loss experience within each category of loans and testing of certain commercial loans for impairment. The evaluation also considered qualitative factors such as economic trends and conditions, which included levels of unemployment, real estate values and the impact on specific industries and geographical markets, changes in lending policies and underwriting standards, delinquency and other credit quality trends, concentrations of credit risk, if any, the results of internal loan reviews and examinations by bank regulatory agencies, the volatility of historical loss rates and the velocity of changes in historical loss rates pertaining to the allowance for credit losses. Management relied on observable data from internal and external sources to the extent it was available to evaluate each of these factors and adjusted the actual historical loss rates to reflect the impact these factors may have on probable losses in the portfolio.

Commercial real estate and commercial and industrial loans greater than $1 million that were reported as non-accrual or as a troubled debt restructuring were tested individually for impairment. Specific reserves were established when appropriate for such loans based on the present value of expected future cash flows of the loan or the estimated realizable value of the collateral, if any.

General reserves were established for loans that were not individually tested for impairment based on historical loss rates adjusted for the impact of the qualitative factors discussed above. Historical loss rates for commercial real estate and commercial and industrial loans were determined for each internal risk grade or group of pass grades using a migration analysis. Residential real estate, home equity and consumer loans were not risk graded, so historical loss rates were utilized to determine the total of each category of loans. Historical loss rates for deposit account overdrafts were based on actual losses in relation to average overdrafts for the period.

Management also qualitatively adjusted its assumptions to account for differences between estimated and actual incurred losses from period to period. The variability of management’s assumptions could have altered the level of the allowance for credit losses and may have had a material impact on future results of operations and financial condition. The loss estimation models and methods used to determine the allowance for credit losses were continually refined and enhanced.

Premises and Equipment

Premises and Equipment— Premises and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized over the shorter of the estimated economic useful lives of the leased assets or the remaining terms of the underlying leases. Useful lives range from 3 to 10 years for furniture and equipment, 15 to 39 years for buildings and building improvements, and 15 years for land improvements. Maintenance and repairs are expensed as incurred while major improvements that extend the useful life of an asset are capitalized and depreciated over the estimated remaining useful life of the asset.

Operating leases are recorded as a right of use (“ROU”) asset and operating lease liability, included in premises and equipment, net and other liabilities, respectively. Operating lease ROU assets represent the right to use an underlying asset during the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at lease commencement based on the present value of the remaining lease payments using a discount rate that represents our incremental borrowing rate at the lease commencement date. Operating lease expense, which is comprised of amortization of the ROU asset and the implicit interest accreted on the operating lease liability, is recognized on a straight-line basis over the lease term, and is recorded primarily in net occupancy expense in the consolidated statements of comprehensive income.

Other Real Estate Owned and Repossessed Assets

Other Real Estate Owned and Repossessed Assets— Other real estate owned and repossessed assets, which are considered available-for-sale and are reported in other assets, are carried at the lower of cost or their estimated current fair value, less estimated costs to sell. Other real estate owned consists primarily of properties acquired through, or in lieu of, foreclosure. Repossessed collateral primarily consists of automobiles and other types of collateral acquired to satisfy defaulted consumer loans. Subsequent declines in fair value, if any, income and expense associated with the management of the collateral, and gains or losses on the disposition of these assets are recognized in the Consolidated Statements of Income in non-interest income. Refer to Note 14, “Revenue Recognition” for further detail.

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets— Wesbanco accounts for business combinations using the acquisition method of accounting. Accordingly, the identifiable assets acquired, the liabilities assumed, and any non-controlling interest of an acquired business are recorded at their estimated fair values as of the date of acquisition with any excess of the cost of the acquisition over the fair value recorded as goodwill. Other intangible assets represent purchased assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset, or liability.

Goodwill is not amortized but is evaluated for impairment annually, or more often if events or circumstances indicate it may be impaired. Finite-lived intangible assets, which consist primarily of core deposit and customer list intangibles (long-term customer-relationship intangible assets) are amortized using straight-line and accelerated methods over their weighted-average estimated useful lives, ranging from ten to sixteen years in total, and are tested for impairment whenever events or circumstances indicate that their carrying amount may not be recoverable. Non-compete agreements are recognized in other assets on the balance sheet and are amortized on a straight-line basis over the life of the respective agreements, ranging from one to four years.

Goodwill is evaluated for impairment by either assessing qualitative factors to determine whether it is necessary to perform the goodwill impairment test, or Wesbanco may elect to perform a quantitative goodwill impairment test. Under the qualitative assessment, Wesbanco assesses qualitative factors to determine whether it is more likely than not that the fair value of its reporting units are less than their carrying amounts, including goodwill. If it is more likely than not, the goodwill impairment test is used to identify potential goodwill impairment and measure the amount of a goodwill impairment loss to be recognized, if any. The estimated fair value of each reporting unit is compared to its carrying value, including goodwill. If the estimated fair value of a reporting unit exceeds its carrying amount, the goodwill of that reporting unit is not considered impaired, and no impairment loss is recognized. However, if the carrying amount of the reporting unit exceeds its fair value, an impairment loss is recognized based on the excess of a reporting unit’s carrying value over its fair value.

Intangible assets with finite useful lives are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. An impairment loss is recognized when the carrying amount of an intangible asset with a finite useful life is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and the fair value of the asset. Wesbanco does not have any indefinite-lived intangible assets.

Bank-Owned Life Insurance

Bank-Owned Life Insurance— Wesbanco has purchased life insurance policies on certain executive and other officers. Wesbanco receives the cash surrender value of each policy upon its termination or benefits are payable upon the death of the insured. These policies are recorded in the Consolidated Balance Sheets at their net cash surrender value. Changes in net cash surrender value are recognized in non-interest income in the Consolidated Statements of Income. Adjustments to cash surrender value and death benefits received, if recognized as income, are currently tax-exempt.

Interest Rate Lock Commitments

Interest Rate Lock Commitments— In order to attract potential home borrowers, Wesbanco offers interest rate lock commitments (“IRLC”) to such potential borrowers. IRLC are generally for sixty days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some IRLC expire prior to the funding of the related loan. For IRLC issued in connection with potential loans intended for sale, which consist primarily of originated longer-term fixed rate residential home mortgage loans that qualify for secondary market sale, the Bank enters into positions of forward month mortgage-backed securities to be announced (“TBA”) contracts on a mandatory basis or on a one-to-one forward sales contract on a best efforts basis.

A mortgage loan sold on a mandatory basis is sold to the secondary market when the mortgage loan is funded. Wesbanco enters into TBA contracts in order to control interest rate risk during the period between the IRLC and the sale of the mortgage loan. The IRLC is executed between the mortgagee and Wesbanco, and the forward TBA contract is executed between Wesbanco and a counterparty. Both the IRLC and the forward TBA contract are considered derivatives. A mortgage loan sold on a best efforts basis is locked into a forward sales contract on the same day as the IRLC to control interest rate risk during the period between the IRLC and the sale of the mortgage loan. The IRLC is executed between the mortgagee and Wesbanco, and the forward sales contract is executed between Wesbanco and a counterparty. Both the IRLC and the forward sales contract are considered derivatives. Both types of derivatives are recorded at fair value and are not designated in a qualified hedged accounting program. The changes in fair value are recorded in current earnings within mortgage banking income in the Consolidated Statements of Income. The fair value of IRLC is the gain or loss that would be realized on the underlying loans assuming exercise of the commitments under current market rates versus the rate incorporated in the commitments, taking into consideration loans cancelled prior to closing. The fair value of forward sales contracts is based on quoted market prices. Since loans typically close before receipt of funding from an investor, they are accounted for at fair value as “Loans Held for Sale” in the Consolidated Balance Sheets.

Derivative Instruments and Hedging Activities

Derivative Instruments and Hedging Activities— Wesbanco records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether Wesbanco has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Wesbanco enters into back-to-back interest rate swaps with commercial banking customers and then with counterparties for the offsetting interest rate swap. Currently, none of Wesbanco’s derivatives are designated in qualifying hedging relationships, as the derivatives are not used to manage risks within Wesbanco’s assets or liabilities. As such, all changes in fair value of Wesbanco’s derivatives are recognized directly in earnings.

Income Taxes

Income Taxes— The provision for income taxes included in the Consolidated Statements of Income includes both federal and state income taxes and is based on income in the financial statements, rather than amounts reported on Wesbanco’s income tax returns. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases at which rates they are expected to turnaround. A test of the anticipated realizability of deferred tax assets is performed at least annually.

Fair Value

Fair Value— Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value measurements are not adjusted for transaction costs. The ASC also establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The three levels of the fair value hierarchy are described below:

Level 1—Quoted prices in active markets for the same security that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, or model-based valuation techniques where all significant assumptions are observable, either directly or indirectly, in the market;

Level 3—Valuation is generated from model-based techniques where one or more significant assumptions are not observable, either directly or indirectly, in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques may include use of discounted cash flow models and similar techniques.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

Earnings Per Common Share

Earnings Per Common Share— Basic earnings per common share (“EPS”) is calculated by dividing net income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period. For diluted EPS, the weighted-average number of shares for the period is increased by the number of shares, which would be issued assuming the exercise of in-the-money common stock options and any outstanding warrants. Time-based restricted stock shares are recorded as issued and outstanding upon their grant, rather than upon vesting, and therefore are included in the weighted-average shares outstanding due to voting rights granted at the time restricted stock is granted. Performance and market-based restricted stock shares are recorded as issued and outstanding upon their achieving the required performance or market factors. These restricted shares are included in the number of shares outstanding for diluted EPS if their performance or market factors are expected to be achieved as of the reporting date.

Trust Assets

Trust Assets— Assets held by the Bank in fiduciary or agency capacities for its customers are not included as assets in the Consolidated Balance Sheets. Certain money market trust assets are held on deposit at the Bank and are accounted for as such.

Stock-Based Compensation

Stock-Based Compensation— Stock-based compensation awards granted, comprised of stock options, performance and time-based restricted stock, and total shareholder return (“TSR”) awards are valued at fair value and compensation cost is recognized on a straight-line basis over the requisite service or performance period of each award. For service-based awards with graded vesting schedules, compensation expense is divided among the vesting periods with each separately vested portion of the award recognized in compensation expense on a straight-line basis over the requisite service period. For performance-based awards and TSR awards, compensation expense is recognized evenly over the performance period, based on the probability of the achievements of the performance or market conditions set forth in the plans. Upon adoption of Accounting Standards Update (“ASU”) 2016-09, “Compensation-Stock Compensation (Topic 718)”, Wesbanco recognizes forfeitures as they occur rather than estimating them over the life of the award.

Defined Benefit Pension Plan

Defined Benefit Pension Plan— Wesbanco recognizes in the statement of financial position an asset for the plan’s overfunded status or a liability for the plan’s underfunded status. Wesbanco recognizes fluctuations in the funded status in the year in which the changes occur through other comprehensive income. Plan assets are determined based on fair value generally representing observable market prices. The projected benefit obligation is determined based on the present value of projected benefit distributions at an assumed discount rate. The discount rate utilized is based on a fitted yield curve approach whereby the yield curve compares the expected stream of future benefit payments for the plan to high quality corporate bonds available in the marketplace to determine an equivalent discount rate. Periodic pension expense includes service costs, interest costs based on an assumed discount rate, an expected return on plan assets based on an actuarially-derived market-related value, an assumed rate of annual compensation increase, and amortization or accretion of actuarial gains and losses as well as other actuarial assumptions. The service cost component is recognized in salaries and wages and the remaining costs are recognized in employee benefits within the Company’s Consolidated Statement of Income. Wesbanco utilizes a full yield curve approach in the estimation of service and interest components by applying the specific spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. The plan has been closed to new entrants since August 2007; however, benefits are still earned for those plan participants with continuing employment after August 2007. Refer to Note 13, “Employee Benefit Plans” for further detail.

Post-retirement Medical Benefit Plan

Post-retirement Medical Benefit Plan— Wesbanco acquired a non-qualified supplemental retirement plan for certain key employees from Farmers Capital Bank Corp. (“FFKT”). The Plan provides lifetime medical and dental benefits upon retirement for certain employees meeting the eligibility requirement, which were amended by Wesbanco upon acquisition. Wesbanco recognizes a liability for the projected benefit obligation in the Consolidated Balance Sheets in other liabilities as this plan is unfunded until period payments are made. Wesbanco recognizes fluctuations in the projected benefit obligation through other comprehensive income. The projected benefit obligation is based on the present value of projected medical and dental obligations at an assumed discount rate. Periodic benefit expense includes service cost, interest cost based on an assumed discount rate, and amortization or accretion of actuarial gains and losses, as well as other actuarial assumptions. Refer to Note 13, “Employee Benefit Plans” for further detail.

Recent accounting pronouncements

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

ASU 2020-04 Reference Rate Reform (Topic 848)

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848)”. Due to the potential discontinuance of the London Interbank Offered Rate (LIBOR), regulators have undertaken reference rate initiatives to identify alternative reference rates that are more observable or transaction based and less susceptible to manipulation. 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. Wesbanco is assessing the impact of adopting the new guidance on the consolidated financial statements on an ongoing basis with no material impacts expected at this time.

ASU 2018-15 Intangibles – Goodwill and Other Internal-Use Software

In August 2018, the FASB issued ASU 2018-15, “Intangibles - Goodwill and Other Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This ASU specifically aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. The ASU does not affect the accounting for the service element of a hosting arrangement that is a service contract. The guidance is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. For Wesbanco, this update was effective January 1, 2020. The adoption of this pronouncement did not have a material impact on Wesbanco’s Consolidated Financial Statements.

ASU 2018-14 Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20)

In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans.” This ASU modifies Accounting Standards Codification (“ASC”) 715-20 to improve disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The guidance is effective for fiscal years ending after December 15, 2020. For Wesbanco, this update was effective January 1, 2020. The adoption of this pronouncement did not have a material impact on Wesbanco’s Consolidated Financial Statements.

ASU 2018-13 Fair Value Measurement – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement

In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU modifies the disclosure objective paragraphs of ASC 820 to eliminate (1) “at a minimum” from the phrase “an entity shall disclose at a minimum” and (2) other similar “open ended” disclosure requirements to promote the appropriate exercise of discretion of entities. The guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. For Wesbanco, this update was effective January 1, 2020. The adoption of this pronouncement did not have a material impact on Wesbanco’s Consolidated Financial Statements.

ASU 2016-13 Financial Instruments – Credit Losses (Topic 326)

In September 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326),” which require entities to use a new forward-looking “expected loss” model also referred to as the current expected credit loss model (“CECL”) on trade and other receivables, held-to-maturity debt securities, loans and other instruments that generally will result in the earlier recognition of allowances for credit losses. For available-for-sale debt securities with unrealized losses, entities measure credit losses in a manner similarly to current procedures, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. Entities will have to disclose significantly more information, including information they use to track credit quality by year of origination for most financing receivables. In April 2019, the FASB issued ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments – Credit Losses, Topic 815, Derivatives and Hedging and Topic 825, Financial Instruments” and in May 2019 the FASB issued ASU 2019-05, “Financial Instruments – Credit Losses (Topic 326), Targeted Transition Relief. Public business entities must apply the new requirements for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, which for Wesbanco was effective January 1, 2020. In December 2018, the Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation (“FDIC”) and the Office of Comptroller of the Currency (“OCC”) approved a final rule to address changes to credit loss accounting under GAAP, including banking organizations’ adoption of the CECL methodology. The final rule provides banking organizations the option to phase-in, over a three-year period, the day-one adverse effects on regulatory capital that may result from the adoption of the new accounting standard. In response to the COVID-19 pandemic, the joint federal bank regulatory agencies issued an optional extension of the regulatory capital transition, which allows for a two-year delay and then a three-year transition period from January 1, 2022 through December 31, 2024. Under the interim final rule, the amount of adjustments to regulatory capital deferred until the phase-in period includes both the initial impact of our adoption of CECL at January 1, 2020 and 25% of subsequent changes in our allowance for credit losses during each quarter of the two-year period ended December 31, 2021, (collectively, the “CECL regulatory capital transition adjustment”). Wesbanco has elected to defer the impact of CECL on its regulatory capital for two years and then will phase-in the impact of the adoption of this standard on the regulatory capital calculations over the subsequent three-year period.

Under CECL, acquired loans or pools of loans that have experienced more-than-insignificant credit deterioration are deemed to be PCD loans, and are grossed-up on day 1 by the initial credit estimate through the allowance as opposed to a reduction in the loan’s amortized cost. The credit mark on acquired loans deemed not to be PCD loans are reflected as a reduction in the loan’s amortized cost, with an allowance and corresponding provision for credit losses recorded in the first reporting period after acquisition through current period earnings, while the loan mark will accrete through interest income over the life of such loans. At acquisition, Wesbanco will consider several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors may include loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, materiality of the credit and loans that have been previously modified in a TDR. Upon adoption of this standard, acquired loans from prior acquisitions that met the guidelines under ASC 310-30 (formerly known as “purchased credit-impaired”) were reclassified as PCD loans. The accretable portion of the loan mark as of adoption date continues to accrete into interest income. However, the non-accretable portion of the loan mark was added to the allowance upon adoption, and any reversals of such mark will flow through the allowance in future periods. The loan mark on ASC 310-20 loans (“non-purchased credit-impaired”) from prior acquisitions continues to accrete through interest income over the life of such loans.

Wesbanco began planning in 2016 for the implementation of CECL and completed parallel runs in 2019 to ensure the various forecasting and modeling assumptions were reasonable and supportable, including certain qualitative factors that were developed to estimate the initial current expected credit loss allowance. Wesbanco engaged a third-party to validate the data inputs and the models utilized in the CECL calculation. In addition, the Company prepared documentation of the accounting policy decisions, changes to the business processes and procedures, and the control environment under the adoption of this standard. The day 1 impact on the allowance for credit losses was $41.4 million, which included a $6.7 million adjustment for PCD loans and a $3.0 million adjustment related to loan commitments. The after-tax effect on retained earnings was $26.6 million as of January 1, 2020. The day 1 CECL calculation was derived from the selected assumption of a one-year reasonable and supportable forecast, which was obtained from a third-party vendor. After the forecast period, Wesbanco reverts back over a one year period to historical loss rates adjusting for prepayments and curtailments, to estimate losses over the remaining life of loans. The most sensitive assumptions include the length of the forecast and reversion periods, forecast of unemployment and interest rate spreads and prepayment speeds. See Note 5, “Loans and the Allowance for Credit Losses” for further detail.

Wesbanco recognized an allowance for credit losses for held-to-maturity (“HTM”) debt securities of $0.2 million as of January 1, 2020 upon adoption of this standard. See Note 4, “Securities” for further detail.