Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]
Basis of Presentation	The accounting and reporting policies of Peoples Bancorp Inc. and subsidiaries (“Peoples” refers to Peoples Bancorp Inc. and its consolidated subsidiaries collectively, except where the context indicates the reference relates solely to Peoples Bancorp Inc.) conform to U.S. generally accepted accounting principles (“US GAAP”) and to general practices within the banking industry. The preparation of the financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Business Combinations	Business Combinations: Business combinations are accounted for using the acquisition method of accounting. Under this accounting method, the acquired company’s net assets are recorded at fair value on the date of acquisition, and the results of operations of the acquired company are combined with those of Peoples from the acquisition date forward. Costs related to the acquisition are expensed as incurred. The purchase price paid over the fair value of the net assets acquired, including intangible assets with finite lives, is recorded as goodwill.
Consolidation	Consolidation: Peoples’ Consolidated Financial Statements include subsidiaries in which Peoples has a controlling financial interest, principally defined as owning a voting interest of greater than 50%. The Consolidated Financial Statements include the accounts of Peoples and its consolidated subsidiaries, Peoples Bank (along with its wholly-owned subsidiaries, Peoples Insurance Agency, LLC (“Peoples Insurance”) and Vantage Financial, LLC (“Vantage”)), Peoples Investment Company, NB&T Statutory Trust III, FNB Capital Trust One, Ascencia Statutory Trust I, and Porter Statutory Trusts II-IV, for which Peoples holds all of the common securities. All intercompany accounts and transactions have been eliminated.
Fair Value Measurements	Fair Value Measurements: The measurement of fair value under US GAAP uses a hierarchy intended to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows: Level 1: Quoted prices in active exchange markets for identical assets or liabilities; also includes certain U.S. Treasury and other U.S. government and agency securities actively traded in over-the-counter markets. Level 2: Observable inputs other than Level 1 including quoted prices for similar assets or liabilities, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data; also includes derivative financial instruments whose value is determined using a pricing model with observable market inputs or can be derived principally from, or corroborated by, observable market data. This category generally includes certain U.S. government and agency securities, corporate debt securities, derivative instruments, and residential mortgage loans held for sale. Level 3: Unobservable inputs supported by little or no market activity for financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as financial instruments for which the determination of fair value requires significant management judgment or estimation; also includes observable inputs for single dealer nonbinding quotes not corroborated by observable market data. This category generally includes certain private equity investments, retained interests from securitization, and certain collateralized debt obligations.
Operating Segments	Operating Segments: Peoples’ business activities are currently confined to one reportable operating segment, which is community banking. As a community banking entity, Peoples offers its customers a full range of products including a complete line of banking, leasing, insurance, investment and trust solutions.
Cash and Cash Equivalents	Cash and Cash Equivalents: Cash and cash equivalents include cash on hand, balances due from other banks, interest-bearing deposits in other banks, federal funds sold and other short-term investments with original maturities of 90 days or less. Peoples had no restricted funds at December 31, 2023 or at December 31, 2022 held in interest-bearing deposits in other banks, which were being used as collateral and not available for withdrawal.
Investment Securities	Investment Securities: Investment securities are recorded initially at cost, which includes premiums and discounts if purchased at other than par or face value. Peoples amortizes premiums and accretes discounts as an adjustment to interest income on a level yield basis. The cost of investment securities sold, excluding equity investment securities, and any resulting gain or loss, is based on the specific identification method and recognized as of the trade date. The cost of equity investment securities is based on the weighted-average method. Peoples determines the appropriate classification of investment securities at the time of purchase. Held-to-maturity securities are those securities that Peoples has the positive intent and ability to hold to maturity and are recorded at amortized cost. Available-for-sale securities are those securities that would be available to be sold in the future in response to Peoples’ liquidity needs, changes in market interest rates, and asset-liability management strategies, among other considerations. Available-for-sale securities are reported at fair value, with unrealized gains and losses reported in total stockholders’ equity as a separate component of accumulated other comprehensive loss (“AOCL”), net of applicable deferred income taxes. Certain restricted equity investment securities that do not have readily determinable fair values and for which Peoples does not exercise significant influence, are carried at cost. These cost method securities are reported in “Other investment securities” on the Consolidated Balance Sheets and consist primarily of shares of the Federal Home Loan Bank of Cincinnati (the “FHLB”) and the Federal Reserve Bank of Cleveland (the “FRB”). Peoples evaluates available-for-sale investment securities on a quarterly basis to determine how much, if any, allowance for credit losses is required. Peoples reviews available-for-sale investment securities at an unrealized loss position, with potential exposure to a credit event (which excludes U.S. government and U.S. government sponsored agency securities) to determine if the unrealized loss was credit-related. An allowance for credit losses is recorded to the extent that the unrealized loss was credit-related and likely to be permanent. Peoples evaluates held-to-maturity investment securities on a quarterly basis in determining an allowance for credit losses. Peoples has determined that the loss given default for U.S. government sponsored enterprise investment securities is zero, due to the fact that it is unlikely the ultimate guarantor (the U.S. government) would not perform on its implicit guarantee in the event of default. The remaining securities are included in the calculation of the allowance for credit losses for held-to-maturity investment securities.
Loans and Leases and Loans Held for Sale	Loans and Leases: Loans originated by Peoples that Peoples has the positive intent and ability to hold for the foreseeable future or to maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, purchase premiums and discounts, charge-offs and an allowance for credit losses. Leases originated by Peoples are reported at the net investment of the lease, net of initial direct costs, charge-offs and an allowance for credit losses. Throughout this Form 10-K, loans and leases are referred to as “total loans” and “loans held for investment.” The foreseeable future is based upon current market conditions and business strategies, as well as balance sheet management and liquidity. As the conditions change, so may management’s view of the foreseeable future. Peoples considers loans and leases past due if any required principal and interest payments have not been received as of the date such payments were required to be made under the terms of the loan or lease agreement. Upon detection of the reduced ability of a borrower or lessee to meet cash flow obligations, consumer and residential real estate loans and leases are typically charged down to the net realizable value, with the residual balance placed on nonaccrual status. Loans and leases deemed to be uncollectable are charged against the allowance for credit losses, while recoveries of previously charged off amounts are credited to the allowance for credit losses. Loans and leases acquired in a business combination that have evidence of more than insignificant credit deterioration, which includes loans and leases that Peoples believes it is probable that Peoples will be unable to collect all contractually required payments, are considered PCD loans or leases. These loans are recorded at the purchase price, and an allowance for credit losses is determined using the same methodology as for other loans or leases. The initial allowance for credit losses determined on a collective basis is allocated to individual loans or leases. The total of the purchase price and allowance for credit losses is the net amount expected to be collected for PCD loans or leases. The variance between the initial amortized cost basis and the par value of the loan is considered an interest premium or discount, which is amortized or accreted into interest income on a level yield method over the life of the loan. The variance between the initial amortized cost basis and the fair value of a lease is considered an interest premium or discount, which is amortized or accreted into interest income on a level yield method over the life of the lease. Loans and leases acquired in a business combination that are not considered PCD are recorded at fair value and the difference between the acquisition date fair value and the contractual amounts due at the acquisition date represents the discount or premium to each loan’s or lease’s cost basis and is accreted or amortized to interest income over the loan’s or lease’s remaining life using the level yield method. At the acquisition date, Peoples records provision for credit losses to establish the allowance for credit losses for these acquired loans and leases. Loans Held for Sale: Loans originated by Peoples and intended to be sold in the secondary market, generally one-to-four family residential loans, are carried at the lower of cost or estimated fair value determined on an aggregate basis. Gains and losses on sales of loans held for sale are included in mortgage banking income. Loans originated by Peoples with the intent to be held in the portfolio are subsequently transferred to held for sale when a decision is made to sell these loans. At the time of a loan’s transfer to the held for sale classification, the loan is recorded at the lower of cost or its fair value. Any reduction in the loan’s fair value is reflected as a write-down of the recorded investment resulting in a new cost basis, with a corresponding charge against the allowance for credit losses. If the fair value of a loan classified as held for sale in subsequent periods is less than its cost basis, the carrying value of the loan is adjusted accordingly, with the corresponding loss recognized in income.
Allowance for Credit Losses	Allowance for Credit Losses: The allowance for credit losses includes both the allowance for credit losses for loans and leases and the allowance for credit losses on lending-related commitments. The allowance for credit losses is a valuation reserve established through the provision for credit losses charged against income. The allowance for credit losses is estimated by management using relevant available information, from both internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. The allowance for credit losses is measured on a pool basis, with loans collectively evaluated when similar risk characteristics exist. Peoples evaluated risk characteristics, including but not limited to: internal or third-party credit scores or credit ratings, risk ratings or classifications, financial asset type, collateral type, size, effective interest rate, term, geographical location, industry of the borrower, vintage, historical or credit loss patterns and reasonable and supportable forecast periods. Peoples identified 20 segments for which it believes there are similar risk characteristics and utilized a discounted cash flow methodology in determining an allowance for credit losses for each segment. In management’s estimation of expected credit losses, Peoples’ uses a one year reasonable and supportable period across all segments. In estimating credit losses, Peoples uses a loss driver method, which analyzes one or more economic variables to the change in default rate using a regression analysis. Variables that had a strong correlation were selected as economic factors, or variables, for the model. If a single variable was not found to be strongly correlated, additional variables were included. Peoples utilizes the U.S. unemployment and Ohio unemployment as economic factors in modeling. Probabilities of default are used in the loss driver model and are analyzed on a quarterly basis to assess reasonableness. Peoples measured loss given default at the segment level due to statistical considerations using historical information. Peoples also utilized peer data due to somewhat volatile loss history in certain segments to normalize default curves, which provided more meaningful results. Peoples modeled amortizing loans with a prepayment rate annualized to one year. The prepayment rates were calculated using Peoples’ historical data, at the segment level. Peoples models extensions of contractual terms in the following situations: when a loan is 60 days or more past due, when a partial charge-off has occurred, if the loan is in nonaccrual status, or if the loan is grade 5 or higher. When any of these criteria are met and the loan matures within the next 12 months, the loan will be modeled to extend for an additional 12 months. In general, Peoples completes a quarterly evaluation based on several qualitative factors to determine if there should be adjustments made to the allowance for credit losses. These factors include economic conditions, collateral, concentrations, troubled assets, Peoples’ loss trends, peer loss trends, delinquency trends, portfolio composition and loan growth, underwriting, and certain other risks. The allowance for credit losses related to specific loans was based on management’s estimate of potential losses on impaired loans as determined by (1) the present value of expected future cash flows, (2) the fair value of collateral if the loan is determined to be collateral dependent, or (3) the loan’s observable market price. Peoples categorizes loans involving commercial borrowers into risk categories based upon an established grading matrix. This system is used to manage the risk within Peoples’ commercial lending activities, evaluate changes in the overall credit quality of the loan portfolio and evaluate the appropriateness of the allowance for credit losses. Loan grades are assigned at the time a new loan or lending commitment is extended by Peoples and may be changed at any time when circumstances warrant. Commercial loans to borrowers with an aggregate unpaid principal balance in excess of $1.0 million are reviewed at least on an annual basis for possible credit deterioration. Commercial leases, as well as loan relationships whose aggregate credit exposure to Peoples is equal to or less than $1.0 million, are reviewed at least on an event driven basis. Triggers for review include knowledge of adverse events affecting the borrower’s business, receipt of financial statements indicating deteriorating credit quality or other similar events. Adversely classified loans are reviewed on a quarterly basis. The primary factors considered when assigning a risk grade to a loan include (1) reliability and sustainability of the primary source of repayment, (2) past, present and projected financial condition of the borrower, and (3) current economic and industry conditions. Other factors that could influence the risk grade assigned include the type and quality of collateral and the strength of any guarantors. The primary source of repayment for commercial real estate loans and commercial and industrial loans is normally the operating cash flow of the business available to repay debt. Management’s analysis of operating cash flow for commercial real estate loans secured by non-owner occupied properties takes into account factors such as rent rolls and vacancy statistics. Management’s analysis of operating cash flow for commercial real estate loans secured by owner occupied properties and all commercial and industrial loans considers the profitability, liquidity and leverage of the business. The evaluation of construction loans includes consideration of the borrower’s ability to complete construction within the established budget. The primary factors considered when classifying residential real estate loans, home equity lines of credit and consumer loans include the loan’s past due status and any declaration of bankruptcy by the borrower(s). The classification of residential real estate loans and home equity lines of credit also takes into consideration the current value of the underlying collateral. Peoples has elected the practical expedient not to measure allowance for credit losses for accrued interest receivables and reverses accrued interest on nonperforming loans against interest income in a timely manner. Unfunded Commitments: Peoples also completes a quarterly evaluation for unfunded commitments for loans that are not unconditionally cancellable, which includes construction loans, floor plan lines of credit, home equity lines of credit, other credit lines and letters of credit. Peoples performed a study to determine the historical funding rates of unadvanced portions of loans, and applied these funding rates to the unfunded commitments at period end. The loss rates, including qualitative factors, in determining the allowance for credit losses were applied at the segment level to the unfunded commitment amount to determine the allowance for credit loss liability for unfunded commitments. Nonaccrual Loans: Peoples discontinues the accrual of interest on a loan when conditions cause management to believe collection of all or any portion of the loan’s contractual interest is doubtful. Such conditions may include the borrower being 90 days or more past due on any contractual payments, or current information regarding the borrower’s financial condition and repayment ability. All unpaid accrued interest deemed uncollectable is reversed, which reduces Peoples’ net interest income. Interest received on nonaccrual loans is included in income only if principal recovery is reasonably assured.
Bank Premises and Equipment	Bank Premises and Equipment: Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the related assets owned. Major improvements to leased facilities are capitalized and included in bank premises at cost less accumulated depreciation, which is calculated on the straight-line method over the lesser of the remaining term for the leased facility or the estimated economic life of the improvement.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets: Goodwill represents the excess of the cost of an acquisition or business combination over the fair value of the net assets acquired in the acquisition or business combination. Goodwill is not amortized but is tested for impairment when indicators of impairment exist, or at least annually on October 1. Peoples’ other intangible assets include customer relationship intangible assets, core deposit intangible assets, indefinite-lived trade name and servicing rights representing the net present value of future economic benefits to be earned from acquired customer relationships with definite useful lives. These intangible assets are amortized on an accelerated basis over their estimated lives ranging from 7 to 10 years.
Servicing Rights	Servicing Rights: Servicing rights represent the right to service loans sold to third-party investors. Loans that are sold are primarily mortgage loans, but also include small business and agricultural loans. Servicing rights are recognized separately as a servicing asset whenever Peoples undertakes an obligation to service financial assets. Servicing rights are reported in other intangible assets on the Consolidated Balance Sheets. Serviced loans that have been completely sold are not included on the Consolidated Balance Sheets. Loan servicing income included in mortgage banking income includes servicing fees received from the third-party investors and certain charges collected from the borrowers. Peoples initially records servicing rights at fair value at the time of the sale of the loans to the third-party investor. Peoples follows the amortization method for the subsequent measurement of each class of separately recognized servicing assets and liabilities. Under the amortization method, Peoples amortizes the value of servicing assets or liabilities utilizing a straight-line basis approach over the period of estimated net servicing income or net servicing loss, and assesses servicing assets or liabilities for impairment or increased obligation based on the fair value at each reporting date. The fair value of the servicing rights is determined by using a discounted cash flow model, which estimates the present value of the future net cash flows of the servicing portfolio based on various factors, such as servicing costs, expected prepayment speeds and discount rates.
Derivatives and Interest Rate Lock Commitments	Derivatives: Peoples enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known or expected cash amounts, the value of which is determined by interest rates. Peoples’ derivative financial instruments are used to manage differences in the amount, timing and duration of Peoples’ known or expected cash receipts and its known or expected cash payments principally related to certain variable rate borrowings. Peoples also has interest rate derivative financial instruments that result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in Peoples’ assets or liabilities. Peoples manages a matched book with respect to customer-related derivative financial instruments in order to minimize its net risk exposure resulting from such transactions. Amounts reported in AOCL related to derivatives are reclassified to interest income or expense as interest payments are made or received on Peoples’ variable-rate assets or liabilities. Peoples assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transaction. If the derivative financial instruments designated as cash flow hedges are deemed effective, changes in the fair value of each derivative financial instrument are reported in AOCL (outside of earnings), net of tax, and subsequently reclassified to earnings when the hedged transaction affects earnings. If the derivative financial instruments designated as cash flow hedges are deemed ineffective, changes in the fair value of the derivative financial instrument are recognized directly in earnings. Interest Rate Lock Commitments: Peoples enters into interest rate lock commitments with borrowers and best efforts commitments with investors on mortgage loans originated for sale into the secondary markets to manage the inherent interest rate and pricing risk associated with selling loans. An interest rate lock commitment generally terminates once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. A best efforts commitment generally terminates once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives. The valuation of such commitments considers the servicing release premium, but does not consider other expected cash flows related to the servicing of the future loan. Management determined these derivatives did not have a material effect on Peoples’ financial position, results of operations or cash flows at December 31, 2023.
Investments in Affordable Housing Limited Partnerships	Investments in Affordable Housing Limited Partnerships: Investments in affordable housing consist of investments in limited partnerships that operate qualified affordable housing projects or that invest in other limited partnerships formed to operate affordable housing projects. These investments are considered variable interest entities for which Peoples is not the primary beneficiary. Peoples generally utilizes the proportional amortization method to account for these investments with the tax credits, net of the amortization of the investment, reflected in the Consolidated Statements of Income as a reduction in income tax expense. The unamortized amount of the investments is recorded in “Other assets” and totaled $13.1 million and $15.1 million at December 31, 2023 and 2022, respectively.
Other Real Estate Owned ("OREO")	Other Real Estate Owned (“OREO”): OREO, included in “Other assets” on the Consolidated Balance Sheets, is comprised primarily of commercial and residential real estate properties acquired by Peoples in satisfaction of a loan. OREO obtained in satisfaction of a loan is recorded at the lower of cost or estimated fair value, less estimated costs to sell the property. Peoples had OREO totaling $7.2 million at December 31, 2023 and $8.9 million at December 31, 2022.
Securities Sold Under Agreements to Repurchase ("Repurchase Agreements")	Securities Sold Under Agreements to Repurchase (“Repurchase Agreements”): Peoples enters into Repurchase Agreements with customers and other financial services companies, which are considered financings. As such, these obligations are recorded as a liability on the Consolidated Balance Sheets and disclosed in “Note 9 Short-Term Borrowings” and “Note 10 Long-Term Borrowings,” as appropriate. Securities pledged as collateral under Repurchase Agreements are included in investment securities on the Consolidated Balance Sheets and are disclosed in “Note 3 Investment Securities.” The fair value of the collateral pledged to a third party is continually monitored and additional collateral is pledged or returned, as deemed appropriate.
Interest Income Recognition	Interest Income Recognition: Interest income on loans and investment securities is recognized by methods that result in level rates of return on principal amounts outstanding. This includes yield adjustments resulting from the amortization of premiums on investment securities, loan costs and premiums, and accretion of discounts on investment securities, loan fees and discounts. Loans that have been placed on nonaccrual, and are subsequently returned to accruing status, recognize interest income similar to other accruing loans once they return to accruing status. Prior accrued interest that was reversed when the loan was placed on nonaccrual is recognized when received, after all of the principal of the loan outstanding has been paid. Since mortgage-backed securities comprise a sizable portion of Peoples’ investment portfolio, a significant increase in principal payments on those securities can impact interest income due to the corresponding acceleration of premium amortization or discount accretion.
Revenue Recognition	Revenue Recognition: Peoples recognizes revenues as they are earned based on contractual terms, or as services are provided and collectability is reasonably assured. Peoples’ principal source of revenue is interest income, which is recognized on an accrual basis primarily according to the terms in written contracts, such as loan agreements or securities contracts. Estimates of variable consideration are included in revenue to the extent that it is probable that a significant reversal of cumulative revenue will not occur, once the uncertainty is resolved. Peoples’ contracts with customers are short-term in nature, and were recognized under the following revenue streams: Electronic Banking Income: Electronic banking income consists of two revenue streams related to interchange income, and promotional and usage income. Peoples recognizes interchange income over time, on a monthly basis, which is based on the transactional volume of debit card and credit card activity completed by its customers during the month in which income is recognized. Peoples is obligated, based on its contracts with third parties, to meet certain volumes of debit card and credit card activities, which are performed by Peoples’ customers, over a certain period of time. Interchange income is variable as it is based on the transaction volume of debit card activity completed by Peoples’ customers. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due for all PIN transactions from the vendor within one month of the completed customer debit card and credit card activity, while all other interchange transaction fees are earned and recorded on a daily basis. Peoples has elected to apply a practical expedient of right to invoice when recognizing interchange income, as Peoples has fulfilled the required performance obligations, the vendor has consumed the service, and Peoples has a right to the related income. Peoples also recognizes promotional and usage income over time, on a monthly basis, which is related to branding of debit cards and promotion or use of certain services provided by third-party vendors. Peoples is obligated to brand its debit cards in a certain manner, and promote and use services provided by third-party vendors. Promotional and usage income is variable as it is based on certain metrics achieved for promotion and usage of services provided by the third-party vendors. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the third-party vendors within 45 days of the monthly fulfillment of Peoples’ performance obligation. Peoples has elected to apply a practical expedient of right to invoice when recognizing promotional and usage income, as Peoples has fulfilled the required performance obligations, the vendor has consumed the service, and Peoples has a right to the related income. Trust and Investment Income: Trust and investment income consists of revenue from fiduciary and brokerage activities, which includes fees for services such as asset management, record keeping, retirement services and estate management, and investment commissions and fees related to the sale of investments. Trust and investment income is recognized over time, which reflects the duration of the contract period for which services have been provided. Trust and investment income is variable as it is based on the value of assets under administration and management, and specific transactions. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer when billed, which is typically a monthly or quarterly billing for services rendered in the most recent period, for which the performance obligation has been satisfied. Peoples has elected to apply a practical expedient of right to invoice when recognizing trust and investment income, as Peoples has fulfilled the performance obligation, the customer has consumed the service, and Peoples has a right to the related income. Peoples has also elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to financial advisors, and will expense these commissions paid to financial advisors as incurred, as these costs are related to the trust and investment income and would have been amortized within one year or less if they had been capitalized, the same period over which the income was earned. Insurance Income: Insurance income generally consists of commissions and fees from the sale of insurance policies, fees related to third-party administration services and performance-based commissions from insurance companies. Peoples recognizes commission income from the sale of insurance policies when it acts as an agent between the insurance carrier and policyholder, arranging for the insurance carrier to provide policies to policyholders, and acts on behalf of the insurance carrier by providing customer service to the policyholders during the respective policy periods. Commission income is recognized over time, using the output method of time elapsed, which corresponds with the underlying insurance policy period, during which Peoples is obligated to perform under contract with the insurance carrier. Commission income is variable, as it is comprised of a certain percentage of the underlying policy premium. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods, based upon historical experience. Payment is due from the insurance carrier for commission income once the insurance policy has been sold. Peoples has elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to insurance producers, and will expense these commissions paid to insurance producers as incurred, as these costs are related to the commission income and would have been amortized within one year or less if they had been capitalized, the same period over which the commission income was earned. Fees related to third-party administration services performed are recognized over time, during the period in which services have been provided, and are recognized monthly in the month the services were performed. Performance-based commissions from insurance companies are recognized at a point in time, when received, and no contingencies remain. Deposit Account Service Charges: Deposit account service charges consist of two revenue streams related to ongoing maintenance fees for deposit accounts and transactional-based fees. Ongoing maintenance fees are recognized on a monthly basis, generally with the monthly period beginning on the day of the month on which the account was opened. Ongoing maintenance fee income is variable as these fees can be reduced if a customer meets certain qualifying metrics. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. For accounts that are assessed maintenance fees through the account analysis process, payment is due from the customer within one month after the monthly period in which the account activity occurred. For all other accounts, monthly maintenance fees are assessed to the account on the last day of the monthly period. Peoples has elected to apply a practical expedient of right to invoice when recognizing ongoing maintenance fees for deposit accounts, as Peoples has fulfilled the required performance obligations, the customer has consumed the service, and Peoples has a right to the related income. Transactional-based fees are recognized at a point in time, which is at the completion of the relevant transaction. Peoples is obligated to perform certain transactions as requested by its consumer and business deposit account customers, which are outside of the normal maintenance requirements. Transactional-based fee income is variable as these fees are directly related to a service request from the customer. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction. Overdraft fees are considered transactional-based fees and accounted for as described herein. Lease income: Peoples acquired its original lease portfolio in the NSL and Vantage acquisitions. Lease income presented in “Non-interest income” consists of gains or losses, including residual asset gains and losses, on (i) the termination of leases, (ii) syndicated leases, and (iii) other fees. Gains on the early termination of leases are recognized at a point in time, which is at the completion of the relevant transaction. Gains on syndicated leases and other fees are recognized over time on a monthly basis. Other Non-Interest Income: Other non-interest income includes certain revenues that are transactional-based, such as wire transfer fees, money order fees and other ancillary fees or services. These transactional-based fees are recognized as income at a point in time, at the completion of the relevant transaction. Transactional-based fee income is variable as these fees are directly related to a service request from the customer. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction. Operating lease income is another component of other non-interest income. Income on operating leases is recognized on a straight-line basis. Depreciation expense related to operating leases is recognized on a straight-line basis in “other non-interest expense.” Peoples began originated operating leases in 2023. Also included in other non-interest income are commercial loan swap fees, which consist of income related to transactions in which Peoples Bank originates variable rate loans with interest rate swaps, where the customer enters into an interest rate swap with Peoples Bank on terms that match the terms of the loan. By entering into the interest rate swap with the customer, Peoples Bank effectively provides the customer with a fixed rate loan while creating a variable rate asset for Peoples Bank. Peoples Bank offsets its exposure in the swap by entering into an offsetting interest rate swap with an unaffiliated financial institution. Commercial loan swap fees are recognized at a point in time, when the transaction has been completed, and there is no recourse or further performance obligation required of Peoples Bank. Commercial loan swap fees are variable as these fees are a certain percentage of the total swap fee collected on a completed transaction. Peoples Bank estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction.
Stock-Based Compensation	Stock-Based Compensation: Stock-based compensation for restricted common share awards is measured at the fair value of these awards on their grant date. Stock-based compensation is recognized over the restriction period for restricted common share awards. Only the expense for the portion of the awards expected to vest is recognized. For service-based awards, stock-based compensation for awards granted to employees who are eligible for retirement is recognized on the date the employee is first eligible to retire.
Advertising Costs	Advertising Costs: Advertising costs are expensed as incurred.
Income Taxes	Income Taxes: Peoples and its subsidiaries file a consolidated federal income tax return. Deferred income tax assets and liabilities reflect the temporary differences between the tax basis of an asset or liability and its reported amount in the Consolidated Financial Statements at the blended federal and state corporate income tax rate. A valuation allowance, if needed, reduces deferred tax assets to the expected amount most likely to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. A tax position is initially recognized in the financial statements when it is more-likely-than-not the position will be sustained upon examination by the tax authorities. Such tax positions are initially and subsequently measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority assuming full knowledge of the position and all relevant facts. Penalties and interest incurred under the applicable tax law are classified as income tax expense. The amounts of Peoples’ uncertain income tax positions and unrecognized benefits are disclosed in “Note 13 Income Taxes.”
Earnings per Share ("EPS")	Earnings per Share (“EPS”): Basic EPS and diluted EPS are calculated using the two-class method since Peoples has issued share-based payment awards that are considered participating securities because they entitle holders the rights to dividends during the vesting term. The two-class method is an earnings allocation formula that determines net income per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Basic EPS is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding adjusted to include the effect of potentially dilutive common shares. Potentially dilutive common shares include non-vested restricted common shares using the treasury stock method.
Recent Adoptions of New Accounting Guidance	Recent Adoptions of New Accounting Guidance: From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that are adopted by Peoples as of the required effective dates. Unless otherwise discussed, management believes the impact of any recently issued standards, including those issued but not yet effective, will not have a material impact on Peoples’ Consolidated Financial Statements taken as a whole. ASU 2020-04 - Reference Rate Reform (Topic 848): This guidance provides optional expedients and exceptions for applying US GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. This guidance was further updated by ASU 2021-01. This update was effective from March 12, 2020 through December 31, 2022. The FASB further updated the guidance with ASU 2022-06, which deferred the sunset date of ASC Topic 848, Reference Rate Reform (Topic 848) from December 31, 2022 to December 31, 2024. ASU 2020-04 was early adopted by Peoples as of September 30, 2021, which reduced the accounting burden of assessing contracts impacted by reference rate reform. Peoples established a working group, consisting of key stakeholders from throughout the company, to monitor developments relating to LIBOR changes and to guide the transition. This team has worked to successfully ensure that technology systems are prepared for the transition, loan documents that reference LIBOR-based rates have been appropriately amended to reference other methods of interest rate determinations and internal and external stakeholders have been apprised of the transition. Peoples ceased originating LIBOR-based products after December 31, 2021 and began originating SOFR-indexed products. Any LIBOR-based products originated prior to December 31, 2021, but maturing after June 30, 2023, were amended to reference SOFR-indexed rates as of July 1, 2023. The transition did not have a material impact on Peoples’ Consolidated Financial Statements. ASU 2022-01 - Derivatives and Hedging (Topic 815): This guidance allows entities to apply the same portfolio hedging method to both prepayable and non-prepayable financial assets. It also allows multiple hedged layers to be designated for a single closed portfolio of financial assets or one or more beneficial interests secured by a portfolio of financial instruments. If a breach is anticipated, an entity is required to partially or fully de-designate a hedged layer or layers until a breach is no longer anticipated. There are additional requirements and enhanced disclosures related to basis adjustments. The guidance should be applied on a prospective, retrospective or modified retrospective basis depending on the amendment. This guidance was adopted by Peoples effective January 1, 2023 and the transition did not have a material impact on Peoples’ Consolidated Financial Statements. ASU 2022-02 - Financial Instruments - Credit Losses (Topic 326): This ASU eliminates the accounting guidance on TDRs for creditors and amends the guidance on disclosures to include current-period gross charge-offs by year of origination. This ASU also updates the requirements related to accounting for credit losses under Accounting Standards Codification (“ASC”) 326 and adds enhanced disclosures for creditors with respect to loan refinancings and restructurings for borrowers experiencing financial difficulty. For entities that have already adopted ASU 2016-13, as Peoples has, the amendments in ASU 2022-02 are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Effective January 1, 2023, Peoples adopted the amendments within ASU 2022-02, using the prospective transition method. The adoption of this guidance did not have a material impact on Peoples’ Consolidated Financial Statements. Pursuant to the guidance in ASU 2022-02, when a loan is restructured, Peoples continues to measure the allowance for credit losses on the loan using a discounted cash flow approach that utilizes a prepayment-adjusted discount rate based on the loan’s restructured terms. Under the TDR accounting model, Peoples modeled a 12-month extension of the contractual terms for TDRs that were to mature within the next 12 months. As Peoples has elected a prospective transition, the extension on a loan that was previously restructured and accounted for as a TDR will continue to be measured as it had been historically in Peoples’ allowance for credit losses until the loan is paid off, sold, liquidated or subsequently restructured. Refer to “Note 4 Loans and Leases” for additional information.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2023

The accounting and reporting policies of Peoples Bancorp Inc. and subsidiaries (“Peoples” refers to Peoples Bancorp Inc. and its consolidated subsidiaries collectively, except where the context indicates the reference relates solely to Peoples Bancorp Inc.) conform to U.S. generally accepted accounting principles (“US GAAP”) and to general practices within the banking industry. The preparation of the financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Business Combinations

Business Combinations: Business combinations are accounted for using the acquisition method of accounting. Under this accounting method, the acquired company’s net assets are recorded at fair value on the date of acquisition, and the results of operations of the acquired company are combined with those of Peoples from the acquisition date forward. Costs related to the acquisition are expensed as incurred. The purchase price paid over the fair value of the net assets acquired, including intangible assets with finite lives, is recorded as goodwill.

Consolidation

Consolidation: Peoples’ Consolidated Financial Statements include subsidiaries in which Peoples has a controlling financial interest, principally defined as owning a voting interest of greater than 50%.

The Consolidated Financial Statements include the accounts of Peoples and its consolidated subsidiaries, Peoples Bank (along with its wholly-owned subsidiaries, Peoples Insurance Agency, LLC (“Peoples Insurance”) and Vantage Financial, LLC (“Vantage”)), Peoples Investment Company, NB&T Statutory Trust III, FNB Capital Trust One, Ascencia Statutory Trust I, and Porter Statutory Trusts II-IV, for which Peoples holds all of the common securities. All intercompany accounts and transactions have been eliminated.

Fair Value Measurements

Fair Value Measurements: The measurement of fair value under US GAAP uses a hierarchy intended to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows:

Level 1: Quoted prices in active exchange markets for identical assets or liabilities; also includes certain U.S. Treasury and other U.S. government and agency securities actively traded in over-the-counter markets.

Level 2: Observable inputs other than Level 1 including quoted prices for similar assets or liabilities, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data; also includes derivative financial instruments whose value is determined using a pricing model with observable market inputs or can be derived principally from, or corroborated by, observable market data. This category generally includes certain U.S. government and agency securities, corporate debt securities, derivative instruments, and residential mortgage loans held for sale.

Level 3: Unobservable inputs supported by little or no market activity for financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as financial instruments for which the determination of fair value requires significant management judgment or estimation; also includes observable inputs for single dealer nonbinding quotes not corroborated by observable market data. This category generally includes certain private equity investments, retained interests from securitization, and certain collateralized debt obligations.

Operating Segments

Operating Segments: Peoples’ business activities are currently confined to one reportable operating segment, which is community banking. As a community banking entity, Peoples offers its customers a full range of products including a complete line of banking, leasing, insurance, investment and trust solutions.

Cash and Cash Equivalents

Cash and Cash Equivalents: Cash and cash equivalents include cash on hand, balances due from other banks, interest-bearing deposits in other banks, federal funds sold and other short-term investments with original maturities of 90 days or less. Peoples had no restricted funds at December 31, 2023 or at December 31, 2022 held in interest-bearing deposits in other banks, which were being used as collateral and not available for withdrawal.

Investment Securities

Investment Securities: Investment securities are recorded initially at cost, which includes premiums and discounts if purchased at other than par or face value. Peoples amortizes premiums and accretes discounts as an adjustment to interest income on a level

yield basis. The cost of investment securities sold, excluding equity investment securities, and any resulting gain or loss, is based on the specific identification method and recognized as of the trade date. The cost of equity investment securities is based on the weighted-average method.

Peoples determines the appropriate classification of investment securities at the time of purchase. Held-to-maturity securities are those securities that Peoples has the positive intent and ability to hold to maturity and are recorded at amortized cost. Available-for-sale securities are those securities that would be available to be sold in the future in response to Peoples’ liquidity needs, changes in market interest rates, and asset-liability management strategies, among other considerations. Available-for-sale securities are reported at fair value, with unrealized gains and losses reported in total stockholders’ equity as a separate component of accumulated other comprehensive loss (“AOCL”), net of applicable deferred income taxes.

Certain restricted equity investment securities that do not have readily determinable fair values and for which Peoples does not exercise significant influence, are carried at cost. These cost method securities are reported in “Other investment securities” on the Consolidated Balance Sheets and consist primarily of shares of the Federal Home Loan Bank of Cincinnati (the “FHLB”) and the Federal Reserve Bank of Cleveland (the “FRB”).

Peoples evaluates available-for-sale investment securities on a quarterly basis to determine how much, if any, allowance for credit losses is required. Peoples reviews available-for-sale investment securities at an unrealized loss position, with potential exposure to a credit event (which excludes U.S. government and U.S. government sponsored agency securities) to determine if the unrealized loss was credit-related. An allowance for credit losses is recorded to the extent that the unrealized loss was credit-related and likely to be permanent.

Peoples evaluates held-to-maturity investment securities on a quarterly basis in determining an allowance for credit losses. Peoples has determined that the loss given default for U.S. government sponsored enterprise investment securities is zero, due to the fact that it is unlikely the ultimate guarantor (the U.S. government) would not perform on its implicit guarantee in the event of default. The remaining securities are included in the calculation of the allowance for credit losses for held-to-maturity investment securities.

Loans and Leases and Loans Held for Sale

Loans and Leases: Loans originated by Peoples that Peoples has the positive intent and ability to hold for the foreseeable future or to maturity or payoff are reported at the principal balance outstanding, net of deferred loan fees and costs, purchase premiums and discounts, charge-offs and an allowance for credit losses. Leases originated by Peoples are reported at the net investment of the lease, net of initial direct costs, charge-offs and an allowance for credit losses. Throughout this Form 10-K, loans and leases are referred to as “total loans” and “loans held for investment.” The foreseeable future is based upon current market conditions and business strategies, as well as balance sheet management and liquidity. As the conditions change, so may management’s view of the foreseeable future.

Peoples considers loans and leases past due if any required principal and interest payments have not been received as of the date such payments were required to be made under the terms of the loan or lease agreement. Upon detection of the reduced ability of a borrower or lessee to meet cash flow obligations, consumer and residential real estate loans and leases are typically charged down to the net realizable value, with the residual balance placed on nonaccrual status. Loans and leases deemed to be uncollectable are charged against the allowance for credit losses, while recoveries of previously charged off amounts are credited to the allowance for credit losses.

Loans and leases acquired in a business combination that have evidence of more than insignificant credit deterioration, which includes loans and leases that Peoples believes it is probable that Peoples will be unable to collect all contractually required payments, are considered PCD loans or leases. These loans are recorded at the purchase price, and an allowance for credit losses is determined using the same methodology as for other loans or leases. The initial allowance for credit losses determined on a collective basis is allocated to individual loans or leases. The total of the purchase price and allowance for credit losses is the net amount expected to be collected for PCD loans or leases. The variance between the initial amortized cost basis and the par value of the loan is considered an interest premium or discount, which is amortized or accreted into interest income on a level yield method over the life of the loan. The variance between the initial amortized cost basis and the fair value of a lease is considered an interest premium or discount, which is amortized or accreted into interest income on a level yield method over the life of the lease.

Loans and leases acquired in a business combination that are not considered PCD are recorded at fair value and the difference between the acquisition date fair value and the contractual amounts due at the acquisition date represents the discount or premium to each loan’s or lease’s cost basis and is accreted or amortized to interest income over the loan’s or lease’s remaining life using the level yield method. At the acquisition date, Peoples records provision for credit losses to establish the allowance for credit losses for these acquired loans and leases.

Loans Held for Sale: Loans originated by Peoples and intended to be sold in the secondary market, generally one-to-four family residential loans, are carried at the lower of cost or estimated fair value determined on an aggregate basis. Gains and losses on sales of loans held for sale are included in mortgage banking income.

Loans originated by Peoples with the intent to be held in the portfolio are subsequently transferred to held for sale when a decision is made to sell these loans. At the time of a loan’s transfer to the held for sale classification, the loan is recorded at the lower of cost or its fair value. Any reduction in the loan’s fair value is reflected as a write-down of the recorded investment resulting in a new cost basis, with a corresponding charge against the allowance for credit losses. If the fair value of a loan classified as held for sale in subsequent periods is less than its cost basis, the carrying value of the loan is adjusted accordingly, with the corresponding loss recognized in income.

Allowance for Credit Losses

Allowance for Credit Losses: The allowance for credit losses includes both the allowance for credit losses for loans and leases and the allowance for credit losses on lending-related commitments. The allowance for credit losses is a valuation reserve established through the provision for credit losses charged against income. The allowance for credit losses is estimated by management using relevant available information, from both internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts.

The allowance for credit losses is measured on a pool basis, with loans collectively evaluated when similar risk characteristics exist. Peoples evaluated risk characteristics, including but not limited to: internal or third-party credit scores or credit ratings, risk ratings or classifications, financial asset type, collateral type, size, effective interest rate, term, geographical location, industry of the borrower, vintage, historical or credit loss patterns and reasonable and supportable forecast periods. Peoples identified 20 segments for which it believes there are similar risk characteristics and utilized a discounted cash flow methodology in determining an allowance for credit losses for each segment.

In management’s estimation of expected credit losses, Peoples’ uses a one year reasonable and supportable period across all segments. In estimating credit losses, Peoples uses a loss driver method, which analyzes one or more economic variables to the change in default rate using a regression analysis. Variables that had a strong correlation were selected as economic factors, or variables, for the model. If a single variable was not found to be strongly correlated, additional variables were included. Peoples utilizes the U.S. unemployment and Ohio unemployment as economic factors in modeling.

Probabilities of default are used in the loss driver model and are analyzed on a quarterly basis to assess reasonableness. Peoples measured loss given default at the segment level due to statistical considerations using historical information. Peoples also utilized peer data due to somewhat volatile loss history in certain segments to normalize default curves, which provided more meaningful results.

Peoples modeled amortizing loans with a prepayment rate annualized to one year. The prepayment rates were calculated using Peoples’ historical data, at the segment level. Peoples models extensions of contractual terms in the following situations: when a loan is 60 days or more past due, when a partial charge-off has occurred, if the loan is in nonaccrual status, or if the loan is grade 5 or higher. When any of these criteria are met and the loan matures within the next 12 months, the loan will be modeled to extend for an additional 12 months.

In general, Peoples completes a quarterly evaluation based on several qualitative factors to determine if there should be adjustments made to the allowance for credit losses. These factors include economic conditions, collateral, concentrations, troubled assets, Peoples’ loss trends, peer loss trends, delinquency trends, portfolio composition and loan growth, underwriting, and certain other risks.

The allowance for credit losses related to specific loans was based on management’s estimate of potential losses on impaired loans as determined by (1) the present value of expected future cash flows, (2) the fair value of collateral if the loan is determined to be collateral dependent, or (3) the loan’s observable market price.

Peoples categorizes loans involving commercial borrowers into risk categories based upon an established grading matrix. This system is used to manage the risk within Peoples’ commercial lending activities, evaluate changes in the overall credit quality of the loan portfolio and evaluate the appropriateness of the allowance for credit losses. Loan grades are assigned at the time a new loan or lending commitment is extended by Peoples and may be changed at any time when circumstances warrant. Commercial loans to borrowers with an aggregate unpaid principal balance in excess of $1.0 million are reviewed at least on an annual basis for possible credit deterioration. Commercial leases, as well as loan relationships whose aggregate credit exposure to Peoples is equal to or less than $1.0 million, are reviewed at least on an event driven basis. Triggers for review include knowledge of adverse events affecting the borrower’s business, receipt of financial statements indicating deteriorating credit quality or other similar events. Adversely classified loans are reviewed on a quarterly basis.

The primary factors considered when assigning a risk grade to a loan include (1) reliability and sustainability of the primary source of repayment, (2) past, present and projected financial condition of the borrower, and (3) current economic and industry conditions. Other factors that could influence the risk grade assigned include the type and quality of collateral and the strength of any guarantors. The primary source of repayment for commercial real estate loans and commercial and industrial loans is normally the operating cash flow of the business available to repay debt. Management’s analysis of operating cash flow for commercial real estate loans secured by non-owner occupied properties takes into account factors such as rent rolls and vacancy statistics. Management’s analysis of operating cash flow for commercial real estate loans secured by owner occupied properties

and all commercial and industrial loans considers the profitability, liquidity and leverage of the business. The evaluation of construction loans includes consideration of the borrower’s ability to complete construction within the established budget.

The primary factors considered when classifying residential real estate loans, home equity lines of credit and consumer loans include the loan’s past due status and any declaration of bankruptcy by the borrower(s). The classification of residential real estate loans and home equity lines of credit also takes into consideration the current value of the underlying collateral.

Peoples has elected the practical expedient not to measure allowance for credit losses for accrued interest receivables and reverses accrued interest on nonperforming loans against interest income in a timely manner.

Unfunded Commitments: Peoples also completes a quarterly evaluation for unfunded commitments for loans that are not unconditionally cancellable, which includes construction loans, floor plan lines of credit, home equity lines of credit, other credit lines and letters of credit. Peoples performed a study to determine the historical funding rates of unadvanced portions of loans, and applied these funding rates to the unfunded commitments at period end. The loss rates, including qualitative factors, in determining the allowance for credit losses were applied at the segment level to the unfunded commitment amount to determine the allowance for credit loss liability for unfunded commitments.

Nonaccrual Loans: Peoples discontinues the accrual of interest on a loan when conditions cause management to believe collection of all or any portion of the loan’s contractual interest is doubtful. Such conditions may include the borrower being 90 days or more past due on any contractual payments, or current information regarding the borrower’s financial condition and repayment ability. All unpaid accrued interest deemed uncollectable is reversed, which reduces Peoples’ net interest income. Interest received on nonaccrual loans is included in income only if principal recovery is reasonably assured.

Bank Premises and Equipment

Bank Premises and Equipment: Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on the straight-line method over the estimated useful lives of the related assets owned. Major improvements to leased facilities are capitalized and included in bank premises at cost less accumulated depreciation, which is calculated on the straight-line method over the lesser of the remaining term for the leased facility or the estimated economic life of the improvement.

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets: Goodwill represents the excess of the cost of an acquisition or business combination over the fair value of the net assets acquired in the acquisition or business combination. Goodwill is not amortized but is tested for impairment when indicators of impairment exist, or at least annually on October 1.

Peoples’ other intangible assets include customer relationship intangible assets, core deposit intangible assets, indefinite-lived trade name and servicing rights representing the net present value of future economic benefits to be earned from acquired customer relationships with definite useful lives. These intangible assets are amortized on an accelerated basis over their estimated lives ranging from 7 to 10 years.

Servicing Rights

Servicing Rights: Servicing rights represent the right to service loans sold to third-party investors. Loans that are sold are primarily mortgage loans, but also include small business and agricultural loans. Servicing rights are recognized separately as a servicing asset whenever Peoples undertakes an obligation to service financial assets. Servicing rights are reported in other intangible assets on the Consolidated Balance Sheets. Serviced loans that have been completely sold are not included on the Consolidated Balance Sheets. Loan servicing income included in mortgage banking income includes servicing fees received from the third-party investors and certain charges collected from the borrowers.

Peoples initially records servicing rights at fair value at the time of the sale of the loans to the third-party investor. Peoples follows the amortization method for the subsequent measurement of each class of separately recognized servicing assets and liabilities. Under the amortization method, Peoples amortizes the value of servicing assets or liabilities utilizing a straight-line basis approach over the period of estimated net servicing income or net servicing loss, and assesses servicing assets or liabilities for impairment or increased obligation based on the fair value at each reporting date. The fair value of the servicing rights is determined by using a discounted cash flow model, which estimates the present value of the future net cash flows of the servicing portfolio based on various factors, such as servicing costs, expected prepayment speeds and discount rates.

Derivatives and Interest Rate Lock Commitments

Derivatives: Peoples enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known or expected cash amounts, the value of which is determined by interest rates. Peoples’ derivative financial instruments are used to manage differences in the amount, timing and duration of Peoples’ known or expected cash receipts and its known or expected cash payments principally related to certain variable rate borrowings. Peoples also has interest rate derivative financial instruments that result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in Peoples’ assets or liabilities. Peoples manages a matched book with respect to customer-related derivative financial instruments in order to minimize its net risk exposure resulting from such transactions. Amounts reported in AOCL related to derivatives are reclassified to interest income or expense as interest payments are made or received on Peoples’ variable-rate assets or liabilities. Peoples assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged transaction. If the derivative financial instruments designated as cash flow hedges are deemed effective, changes in the fair value of each derivative financial instrument are reported in AOCL (outside of earnings), net of tax, and subsequently reclassified to earnings

when the hedged transaction affects earnings. If the derivative financial instruments designated as cash flow hedges are deemed ineffective, changes in the fair value of the derivative financial instrument are recognized directly in earnings.

Interest Rate Lock Commitments: Peoples enters into interest rate lock commitments with borrowers and best efforts commitments with investors on mortgage loans originated for sale into the secondary markets to manage the inherent interest rate and pricing risk associated with selling loans. An interest rate lock commitment generally terminates once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. A best efforts commitment generally terminates once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives. The valuation of such commitments considers the servicing release premium, but does not consider other expected cash flows related to the servicing of the future loan. Management determined these derivatives did not have a material effect on Peoples’ financial position, results of operations or cash flows at December 31, 2023.

Investments in Affordable Housing Limited Partnerships

Investments in Affordable Housing Limited Partnerships: Investments in affordable housing consist of investments in limited partnerships that operate qualified affordable housing projects or that invest in other limited partnerships formed to operate affordable housing projects. These investments are considered variable interest entities for which Peoples is not the primary beneficiary. Peoples generally utilizes the proportional amortization method to account for these investments with the tax credits, net of the amortization of the investment, reflected in the Consolidated Statements of Income as a reduction in income tax expense. The unamortized amount of the investments is recorded in “Other assets” and totaled $13.1 million and $15.1 million at December 31, 2023 and 2022, respectively.

Other Real Estate Owned ("OREO")

Other Real Estate Owned (“OREO”): OREO, included in “Other assets” on the Consolidated Balance Sheets, is comprised primarily of commercial and residential real estate properties acquired by Peoples in satisfaction of a loan. OREO obtained in satisfaction of a loan is recorded at the lower of cost or estimated fair value, less estimated costs to sell the property. Peoples had OREO totaling $7.2 million at December 31, 2023 and $8.9 million at December 31, 2022.

Securities Sold Under Agreements to Repurchase ("Repurchase Agreements")

Securities Sold Under Agreements to Repurchase (“Repurchase Agreements”): Peoples enters into Repurchase Agreements with customers and other financial services companies, which are considered financings. As such, these obligations are recorded as a liability on the Consolidated Balance Sheets and disclosed in “Note 9 Short-Term Borrowings” and “Note 10 Long-Term Borrowings,” as appropriate. Securities pledged as collateral under Repurchase Agreements are included in investment securities on the Consolidated Balance Sheets and are disclosed in “Note 3 Investment Securities.” The fair value of the collateral pledged to a third party is continually monitored and additional collateral is pledged or returned, as deemed appropriate.

Interest Income Recognition

Interest Income Recognition: Interest income on loans and investment securities is recognized by methods that result in level rates of return on principal amounts outstanding. This includes yield adjustments resulting from the amortization of premiums on investment securities, loan costs and premiums, and accretion of discounts on investment securities, loan fees and discounts. Loans that have been placed on nonaccrual, and are subsequently returned to accruing status, recognize interest income similar to other accruing loans once they return to accruing status. Prior accrued interest that was reversed when the loan was placed on nonaccrual is recognized when received, after all of the principal of the loan outstanding has been paid. Since mortgage-backed securities comprise a sizable portion of Peoples’ investment portfolio, a significant increase in principal payments on those securities can impact interest income due to the corresponding acceleration of premium amortization or discount accretion.

Revenue Recognition

Revenue Recognition: Peoples recognizes revenues as they are earned based on contractual terms, or as services are provided and collectability is reasonably assured. Peoples’ principal source of revenue is interest income, which is recognized on an accrual basis primarily according to the terms in written contracts, such as loan agreements or securities contracts.

Estimates of variable consideration are included in revenue to the extent that it is probable that a significant reversal of cumulative revenue will not occur, once the uncertainty is resolved. Peoples’ contracts with customers are short-term in nature, and were recognized under the following revenue streams:

Electronic Banking Income: Electronic banking income consists of two revenue streams related to interchange income, and promotional and usage income.

Peoples recognizes interchange income over time, on a monthly basis, which is based on the transactional volume of debit card and credit card activity completed by its customers during the month in which income is recognized. Peoples is obligated, based on its contracts with third parties, to meet certain volumes of debit card and credit card activities, which are performed by Peoples’ customers, over a certain period of time. Interchange income is variable as it is based on the transaction volume of debit card activity completed by Peoples’ customers. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due for all PIN transactions from the vendor within one month of the completed customer debit card and credit card activity, while all other interchange transaction fees are earned and recorded on a daily basis. Peoples has elected to apply a practical expedient of right to invoice when recognizing interchange income, as Peoples has fulfilled the required performance obligations, the vendor has consumed the service, and Peoples has a right to the related income.

Peoples also recognizes promotional and usage income over time, on a monthly basis, which is related to branding of debit cards and promotion or use of certain services provided by third-party vendors. Peoples is obligated to brand its debit cards in a

certain manner, and promote and use services provided by third-party vendors. Promotional and usage income is variable as it is based on certain metrics achieved for promotion and usage of services provided by the third-party vendors. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the third-party vendors within 45 days of the monthly fulfillment of Peoples’ performance obligation. Peoples has elected to apply a practical expedient of right to invoice when recognizing promotional and usage income, as Peoples has fulfilled the required performance obligations, the vendor has consumed the service, and Peoples has a right to the related income.

Trust and Investment Income: Trust and investment income consists of revenue from fiduciary and brokerage activities, which includes fees for services such as asset management, record keeping, retirement services and estate management, and investment commissions and fees related to the sale of investments. Trust and investment income is recognized over time, which reflects the duration of the contract period for which services have been provided. Trust and investment income is variable as it is based on the value of assets under administration and management, and specific transactions. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer when billed, which is typically a monthly or quarterly billing for services rendered in the most recent period, for which the performance obligation has been satisfied. Peoples has elected to apply a practical expedient of right to invoice when recognizing trust and investment income, as Peoples has fulfilled the performance obligation, the customer has consumed the service, and Peoples has a right to the related income. Peoples has also elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to financial advisors, and will expense these commissions paid to financial advisors as incurred, as these costs are related to the trust and investment income and would have been amortized within one year or less if they had been capitalized, the same period over which the income was earned.

Insurance Income: Insurance income generally consists of commissions and fees from the sale of insurance policies, fees related to third-party administration services and performance-based commissions from insurance companies.

Peoples recognizes commission income from the sale of insurance policies when it acts as an agent between the insurance carrier and policyholder, arranging for the insurance carrier to provide policies to policyholders, and acts on behalf of the insurance carrier by providing customer service to the policyholders during the respective policy periods. Commission income is recognized over time, using the output method of time elapsed, which corresponds with the underlying insurance policy period, during which Peoples is obligated to perform under contract with the insurance carrier. Commission income is variable, as it is comprised of a certain percentage of the underlying policy premium. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods, based upon historical experience. Payment is due from the insurance carrier for commission income once the insurance policy has been sold. Peoples has elected to apply a practical expedient related to capitalizable costs, which are the commissions paid to insurance producers, and will expense these commissions paid to insurance producers as incurred, as these costs are related to the commission income and would have been amortized within one year or less if they had been capitalized, the same period over which the commission income was earned.

Fees related to third-party administration services performed are recognized over time, during the period in which services have been provided, and are recognized monthly in the month the services were performed.

Performance-based commissions from insurance companies are recognized at a point in time, when received, and no contingencies remain.

Deposit Account Service Charges: Deposit account service charges consist of two revenue streams related to ongoing maintenance fees for deposit accounts and transactional-based fees.

Ongoing maintenance fees are recognized on a monthly basis, generally with the monthly period beginning on the day of the month on which the account was opened. Ongoing maintenance fee income is variable as these fees can be reduced if a customer meets certain qualifying metrics. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. For accounts that are assessed maintenance fees through the account analysis process, payment is due from the customer within one month after the monthly period in which the account activity occurred. For all other accounts, monthly maintenance fees are assessed to the account on the last day of the monthly period. Peoples has elected to apply a practical expedient of right to invoice when recognizing ongoing maintenance fees for deposit accounts, as Peoples has fulfilled the required performance obligations, the customer has consumed the service, and Peoples has a right to the related income.

Transactional-based fees are recognized at a point in time, which is at the completion of the relevant transaction. Peoples is obligated to perform certain transactions as requested by its consumer and business deposit account customers, which are outside of the normal maintenance requirements. Transactional-based fee income is variable as these fees are directly related to a service request from the customer. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction. Overdraft fees are considered transactional-based fees and accounted for as described herein.

Lease income: Peoples acquired its original lease portfolio in the NSL and Vantage acquisitions. Lease income presented in “Non-interest income” consists of gains or losses, including residual asset gains and losses, on (i) the termination of leases, (ii) syndicated leases, and (iii) other fees. Gains on the early termination of leases are recognized at a point in time, which is at the completion of the relevant transaction. Gains on syndicated leases and other fees are recognized over time on a monthly basis.

Other Non-Interest Income: Other non-interest income includes certain revenues that are transactional-based, such as wire transfer fees, money order fees and other ancillary fees or services. These transactional-based fees are recognized as income at a point in time, at the completion of the relevant transaction. Transactional-based fee income is variable as these fees are directly related to a service request from the customer. Peoples estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction.

Operating lease income is another component of other non-interest income. Income on operating leases is recognized on a straight-line basis. Depreciation expense related to operating leases is recognized on a straight-line basis in “other non-interest expense.” Peoples began originated operating leases in 2023.

Also included in other non-interest income are commercial loan swap fees, which consist of income related to transactions in which Peoples Bank originates variable rate loans with interest rate swaps, where the customer enters into an interest rate swap with Peoples Bank on terms that match the terms of the loan. By entering into the interest rate swap with the customer, Peoples Bank effectively provides the customer with a fixed rate loan while creating a variable rate asset for Peoples Bank. Peoples Bank offsets its exposure in the swap by entering into an offsetting interest rate swap with an unaffiliated financial institution. Commercial loan swap fees are recognized at a point in time, when the transaction has been completed, and there is no recourse or further performance obligation required of Peoples Bank. Commercial loan swap fees are variable as these fees are a certain percentage of the total swap fee collected on a completed transaction. Peoples Bank estimates the variable consideration based upon the “most likely amount” method, and does not expect or anticipate a significant reversal of revenue in future periods. Payment is due from the customer at the time of completion of the requested transaction.

Stock-Based Compensation

Stock-Based Compensation: Stock-based compensation for restricted common share awards is measured at the fair value of these awards on their grant date. Stock-based compensation is recognized over the restriction period for restricted common share awards. Only the expense for the portion of the awards expected to vest is recognized. For service-based awards, stock-based compensation for awards granted to employees who are eligible for retirement is recognized on the date the employee is first eligible to retire.

Advertising Costs

Advertising Costs: Advertising costs are expensed as incurred.

Income Taxes

Income Taxes: Peoples and its subsidiaries file a consolidated federal income tax return. Deferred income tax assets and liabilities reflect the temporary differences between the tax basis of an asset or liability and its reported amount in the Consolidated Financial Statements at the blended federal and state corporate income tax rate. A valuation allowance, if needed, reduces deferred tax assets to the expected amount most likely to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years.

A tax position is initially recognized in the financial statements when it is more-likely-than-not the position will be sustained upon examination by the tax authorities. Such tax positions are initially and subsequently measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with the tax authority assuming full knowledge of the position and all relevant facts. Penalties and interest incurred under the applicable tax law are classified as income tax expense. The amounts of Peoples’ uncertain income tax positions and unrecognized benefits are disclosed in “Note 13 Income Taxes.”

Earnings per Share ("EPS")

Earnings per Share (“EPS”): Basic EPS and diluted EPS are calculated using the two-class method since Peoples has issued share-based payment awards that are considered participating securities because they entitle holders the rights to dividends during the vesting term. The two-class method is an earnings allocation formula that determines net income per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Basic EPS is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding adjusted to include the effect of potentially dilutive common shares. Potentially dilutive common shares include non-vested restricted common shares using the treasury stock method.

Recent Adoptions of New Accounting Guidance

Recent Adoptions of New Accounting Guidance: From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that are adopted by Peoples as of the required effective dates. Unless otherwise discussed, management believes the impact of any recently issued standards, including those issued but not yet effective, will not have a material impact on Peoples’ Consolidated Financial Statements taken as a whole.

ASU 2020-04 - Reference Rate Reform (Topic 848): This guidance provides optional expedients and exceptions for applying US GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. This guidance was further updated by ASU 2021-01. This update was effective from March 12, 2020 through December

31, 2022. The FASB further updated the guidance with ASU 2022-06, which deferred the sunset date of ASC Topic 848, Reference Rate Reform (Topic 848) from December 31, 2022 to December 31, 2024. ASU 2020-04 was early adopted by Peoples as of September 30, 2021, which reduced the accounting burden of assessing contracts impacted by reference rate reform. Peoples established a working group, consisting of key stakeholders from throughout the company, to monitor developments relating to LIBOR changes and to guide the transition. This team has worked to successfully ensure that technology systems are prepared for the transition, loan documents that reference LIBOR-based rates have been appropriately amended to reference other methods of interest rate determinations and internal and external stakeholders have been apprised of the transition. Peoples ceased originating LIBOR-based products after December 31, 2021 and began originating SOFR-indexed products. Any LIBOR-based products originated prior to December 31, 2021, but maturing after June 30, 2023, were amended to reference SOFR-indexed rates as of July 1, 2023. The transition did not have a material impact on Peoples’ Consolidated Financial Statements.

ASU 2022-01 - Derivatives and Hedging (Topic 815): This guidance allows entities to apply the same portfolio hedging method to both prepayable and non-prepayable financial assets. It also allows multiple hedged layers to be designated for a single closed portfolio of financial assets or one or more beneficial interests secured by a portfolio of financial instruments. If a breach is anticipated, an entity is required to partially or fully de-designate a hedged layer or layers until a breach is no longer anticipated. There are additional requirements and enhanced disclosures related to basis adjustments. The guidance should be applied on a prospective, retrospective or modified retrospective basis depending on the amendment. This guidance was adopted by Peoples effective January 1, 2023 and the transition did not have a material impact on Peoples’ Consolidated Financial Statements.

ASU 2022-02 - Financial Instruments - Credit Losses (Topic 326): This ASU eliminates the accounting guidance on TDRs for creditors and amends the guidance on disclosures to include current-period gross charge-offs by year of origination. This ASU also updates the requirements related to accounting for credit losses under Accounting Standards Codification (“ASC”) 326 and adds enhanced disclosures for creditors with respect to loan refinancings and restructurings for borrowers experiencing financial difficulty. For entities that have already adopted ASU 2016-13, as Peoples has, the amendments in ASU 2022-02 are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years.

Effective January 1, 2023, Peoples adopted the amendments within ASU 2022-02, using the prospective transition method. The adoption of this guidance did not have a material impact on Peoples’ Consolidated Financial Statements.

Pursuant to the guidance in ASU 2022-02, when a loan is restructured, Peoples continues to measure the allowance for credit losses on the loan using a discounted cash flow approach that utilizes a prepayment-adjusted discount rate based on the loan’s restructured terms. Under the TDR accounting model, Peoples modeled a 12-month extension of the contractual terms for TDRs that were to mature within the next 12 months. As Peoples has elected a prospective transition, the extension on a loan that was previously restructured and accounted for as a TDR will continue to be measured as it had been historically in Peoples’ allowance for credit losses until the loan is paid off, sold, liquidated or subsequently restructured. Refer to “Note 4 Loans and Leases” for additional information.