Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]
Business Combinations Policy [Policy Text Block]	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 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.
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 generally accepted accounting principles in the United States of America (“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. Certain items in prior financial statements have been reclassified to conform to the current presentation, which had no impact on net income, comprehensive income or loss, net cash provided by operating activities or stockholders' equity.
Consolidation	Consolidation: Peoples' Consolidated Financial Statements include subsidiaries in which Peoples has a controlling financial interest, principally defined as owning a voting interest greater than 50%. In addition, entities not controlled by voting interest or in which the equity investors do not bear the residual economic risks, but for which Peoples is the primary beneficiary are also consolidated. The Consolidated Financial Statements include the accounts of Peoples and its consolidated subsidiaries, Peoples Bank and Peoples Investment Company, along with their wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.
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 ninety days or less. Included in interest-bearing deposits in other banks were $5.0 million and $3.5 million in funds at December 31, 2015 and 2014, respectively, 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, and any resulting gain or loss, is based on the specific identification method and recognized as of the trade date. Management 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 holding gains and losses reported in stockholders' equity as a separate component of other accumulated comprehensive income or loss, net of applicable deferred income taxes. Certain restricted equity 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 as 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"). Management systematically evaluates investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis requires management to consider various factors, which include (1) the duration and magnitude of the decline in value, (2) the financial condition of the issuer or issuers, and (3) the structure of the security. An impairment loss is recognized in earnings only when (1) Peoples intends to sell the debt security, (2) it is more likely than not that Peoples will be required to sell the security before recovery of its amortized cost basis, or (3) Peoples does not expect to recover the entire amortized cost basis of the security. In situations where Peoples intends to sell or when it is more likely than not that Peoples will be required to sell the security, the entire impairment loss must be recognized in earnings. In all other situations, only the portion of the impairment loss representing the credit loss must be recognized in earnings, with the remaining portion being recognized in stockholders' equity as a component of accumulated comprehensive income or loss, net of applicable deferred taxes.
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 contracts 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 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 securitizations, and certain collateralized debt obligations.
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase: Peoples enters into sales of securities under agreements to repurchase (“Repurchase Agreements”) with customers and other financial service companies, which are considered financings. As such, these obligations are recorded as a liability on the Consolidated Balance Sheets and disclosed in Note 8 and Note 9. Securities pledged as collateral under Repurchase Agreements are included in investment securities on the Consolidated Balance Sheets and are disclosed in Note 3. The fair value of the collateral pledged to a third party is continually monitored and additional collateral is pledged or returned, as deemed appropriate.
Loans and Loans Held-For-Sale	Loans: Loans originated 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 and an allowance for loan losses. 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. Net deferred loan costs were $3.3 million and $2.4 million at December 31, 2015 and 2014, respectively. A loan is considered impaired when information and events indicate it is probable that collection of all contractual principal and interest payments is doubtful. Impairment is evaluated in total for smaller-balance loans of a similar nature, primarily consumer and residential real estate loans, and on an individual loan basis for all loans to borrowers with an aggregate unpaid principal balance in excess of $1 million on an annual basis for possible credit deterioration. This loan review process provides Peoples Bank with opportunities to identify potential problem loans and take proactive actions to assure repayment of the loan or minimize Peoples Bank's risk of loss, such as reviewing the relationship more frequently based upon the loan quality rating and aggregate debt outstanding. Upon detection of the reduced ability of a borrower to meet cash flow obligations, the loan is reviewed for possible downgrade or placement on nonaccrual status. Loan relationships whose aggregate debt to Peoples Bank is equal to or less than $1 million are reviewed on an event driven basis. Triggers for review include knowledge of adverse events affecting the business, receipt of financial statements indicating deteriorating credit quality and other events. Peoples typically places any loan deemed to be impaired on nonaccrual status and allocates a specific portion of the allowance for loan losses, if necessary, to reduce the net carrying value of the loan to its estimated net realizable value. Impaired loans, or portions thereof, are charged off when deemed uncollectable. Upon detection of the reduced ability of a borrower to meet cash flow obligations, consumer and residential real estate loans typically are charged down to the net realizable value, with the residual balance placed on nonaccrual status. Loans acquired in a business combination that have evidence of deterioration of credit quality, commonly referred to as "purchase credit impaired" loans, since origination and for which it is probable, at acquisition, that Peoples will be unable to collect all contractually required payments receivable are initially recorded at fair value (the present value of the amounts expected to be collected) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition are not recognized. Over the life of these acquired loans, management continues to monitor each acquired purchased credit impaired loan portfolio for changes in credit quality. Increases in expected cash flows subsequent to acquisition are recognized prospectively over their remaining life as a yield adjustment on the loans. Subsequent decreases in expected cash flows are recognized as an impairment, with the amount of the expected loss included in management's evaluation of the appropriateness of the allowance for loan losses. These purchase credit impaired loans are considered to be accruing and performing even though collection of contractual payments on loans may be in doubt, as income continues to be accreted as long as expected cash flows can be reasonably estimated. Loans acquired in a business combination that are not impaired 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 discounts (or premiums) to a loan's cost basis and are accreted (or amortized) to interest income over the loan's remaining life using the level yield method. Subsequent to the acquisition date, the methods utilized to estimate the required allowance for loan losses for these loans is similar to originated loans; however, Peoples records a provision for loan losses only when the required allowance exceeds the remaining discount. Loans Held-for-Sale: Loans originated 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 with the intent to be held in our 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 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 loan 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 earnings. 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. The interest rate lock commitments generally terminate once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. The best efforts commitments generally terminate once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives which are generally accounted for by recognizing their estimated fair value on the Consolidated Balance Sheets as either a freestanding asset or a freestanding liability. The valuation of such commitments does not consider expected cash flows related to the servicing of the future loan. Management has determined these derivatives do not have a material effect on Peoples' financial position, results of operations or cash flows.
Allowance for Loan Losses	Allowance for Loan Losses: The allowance for loan losses is a valuation reserve established through provisions for loan losses charged against income. The allowance for loan losses is maintained at a level that management deems sufficient to absorb probable losses inherent in the loan portfolio. Loans deemed to be uncollectable are charged against the allowance for loan losses, while recoveries of previously charged-off amounts are credited to the allowance for loan losses. The allowance for loan losses is comprised of specific valuation allowances for loans evaluated individually for impairment and general allocations for pools of homogeneous loans with similar risk characteristics and trends. Peoples' homogenous loan pools include similarly risk-graded commercial and industrial loans, similarly risk-graded commercial real estate loans, real estate construction loans (both commercial and residential), residential real estate loans, consumer home equity loans and other consumer loans. Management's evaluation of the appropriateness of the allowance for loan losses and the related provision for loan losses is based upon a quarterly analysis of the portfolio. While portions of the allowance for loan losses may be allocated to specific loans, the entire allowance for loan losses is available for any loan charged off by management. The allowance for loan losses related to specific loans is 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. The general allocations to specific loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The calculation of historical loss rates for pools of similar loans with similar characteristics is based upon the proportion of actual charge-offs experienced to the total population of loans in the pool. The historical loss rates are periodically updated based on actual charge-off experience. The qualitative factors considered by management include, among other factors, (1) changes in local and national economic conditions, (2) changes in asset quality, (3) changes in loan portfolio volume, (4) the composition and concentrations of credit, (5) the impact of competition on loan structuring and pricing, (6) the impact of interest rate changes on portfolio risk, and (7) effectiveness of Peoples' loan policies, procedures and internal controls. The total allowance established for each homogenous loan pool represents the product of the historical loss rate and the total dollar amount of the loans in the pool. Peoples categorizes loans involving commercial borrowers into risk categories based upon an established grading matrix. This system is used to manage the risk within its commercial lending activities, evaluate changes in the overall credit quality of the loan portfolio and evaluate the appropriateness of the allowance for loan 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. Peoples reviews, at least annually, all loan relationships with aggregate outstanding debt to Peoples of $1 million or more, and loan relationships with aggregate outstanding debt to Peoples of $5 million or more and adversely classified loans are generally 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 guarantors. The primary source of repayment for commercial real estate loans and commercial and industrial loans is normally the business's operating cash flow 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 is based largely on the borrower's ability to complete construction within the established budget. The primary factors considered when classifying consumer loans include the loan's past due status and declaration of bankruptcy by the borrower(s). The classification of residential real estate and home equity lines of credit also takes into account the current value of the underlying collateral.
Troubled Debt Restructuring	Troubled Debt Restructuring: The restructuring of a loan is considered a troubled debt restructuring ("TDR") if both (1) the borrower is experiencing financial difficulties and (2) the creditor has granted a concession. Loans acquired that are restructured after acquisition are not considered TDRs if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools of purchased credit impaired loans. In assessing whether or not a borrower is experiencing financial difficulties, Peoples considers information currently available regarding the financial condition of the borrower. This information includes, but is not limited to, whether (1) the borrower is currently in payment default on any of the borrower's debt, (2) a payment default is probable in the foreseeable future without the modification, (3) the borrower has declared or is in the process of declaring bankruptcy, and (4) the borrower's projected cash flow is insufficient to satisfy contractual payments due under the original terms of the loan without a modification. Peoples considers all aspects of the modification to loan terms to determine whether or not a concession has been granted to the borrower. Key factors considered by Peoples include the borrower's ability to access funds at a market rate for debt with similar risk characteristics, the significance of the modification relative to the unpaid principal balance or collateral value of the debt, and the significance of a delay in the timing of payments relative to the original contractual terms of the loan. The most common concessions granted by Peoples generally include one or more modifications to the terms of the debt, such as (1) a reduction in the interest rate for the remaining life of the debt, (2) an extension of the maturity date at an interest rate lower than the current market rate for new debt with similar risk, (3) a temporary period of interest-only payments, and (4) a reduction in the contractual payment amount for either a short period or the remaining term of the loan. All TDRs are considered impaired loans and are evaluated individually to determine if a write-down is required and if they should be on accrual or nonaccrual status.
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 of the leased facility or the estimated economic life of the improvement.
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 effective yield 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 of income tax expense. The unamortized amount of the investments is recorded in other assets and totaled $3,000 and $45,000 at December 31, 2015 and 2014, respectively.
Other Real Estate Owned	Other Real Estate Owned: Other real estate owned (“OREO”), included in other assets on the Consolidated Balance Sheets, is comprised primarily of commercial and residential real estate properties acquired by Peoples Bank 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 $0.7 million at December 31, 2015 and $0.9 million at December 31, 2014.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets: Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired in the business combination. Goodwill is not amortized but is tested for impairment when indicators of impairment exist, or at least annually on June 30. Based upon the most recently completed goodwill impairment test, Peoples concluded the recorded value of goodwill was not impaired as of December 31, 2015, based upon the estimated fair value of Peoples' single reporting unit. Peoples' other intangible assets consist of customer relationship and core deposit intangible assets representing the net present value of future economic benefit 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.
Mortgage Servicing Rights	Servicing Rights: Servicing rights (“SRs”) represent the right to service loans sold to third-party investors. SRs are recognized separately as a servicing asset or liability whenever Peoples undertakes an obligation to service financial assets. SRs are reported in other intangible assets on the Consolidated Balance Sheets. Serviced loans are not included in 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 SRs 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 in proportion to and 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 fair value at each reporting date. The fair value of the SRs 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.
Trust Assets Under Management	Trust Assets Under Management: Peoples Bank manages certain assets held in a fiduciary or agency capacity for customers. These assets under management, other than cash on deposit at Peoples Bank, are not included in the Consolidated Balance Sheets since they are not assets of Peoples Bank.
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. Amortization of premiums is deducted from, and accretion of discounts is added to, the related interest income. Nonrefundable loan fees and direct loan costs are deferred and recognized over the life of the loan as an adjustment of the yield. Peoples discontinues the accrual of interest on all loans, whether or not such loans are considered past due, when management believes it is probable the borrower will be unable to meet its payment obligations as they become due, as well as when required by regulatory provisions. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest received on nonaccrual loans is included in income only if principal recovery is reasonably assured. A nonaccrual loan is restored to accrual status when it is brought current, has performed in accordance with contractual terms for a reasonable period of time, and the collectability of the total contractual principal and interest is no longer in doubt.
Other Income Recognition	Other Income Recognition: Service charges on deposits include cost recovery fees associated with services provided, such as overdraft and non-sufficient funds. Trust and investment income consists of revenue from fiduciary activities, which include fees for services such as asset management, recordkeeping, retirement services and estate management, and investment commissions and fees related to the sale of investments. Income from these activities is recognized at the time the related services are performed. Insurance income consists of commissions and fees from the sales of insurance policies and related insurance services. Insurance income is recognized when it is earned and can be reasonably estimated. Performance-based commissions from insurance companies are recognized when received and no contingencies remain.
Income Taxes	Income Taxes: Peoples and its subsidiaries file a consolidated federal income tax return. Deferred income tax assets and liabilities are provided for temporary differences between the tax basis of an asset or liability and its reported amount in the Consolidated Financial Statements at the statutory federal 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. The components of accumulated other comprehensive income or loss included in the Consolidated Statements of Stockholders' Equity have been computed based upon a 35% federal tax rate. 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 amount of Peoples' valuation allowance and uncertain income tax positions and unrecognized benefits are disclosed in Note 12.
Advertising Costs	Advertising Costs: Advertising costs are generally expensed as incurred.
Earnings Per Share	Earnings per Share: Basic and diluted earnings per common share (“EPS”) are calculated using the two-class method since Peoples has issued some share-based payment awards 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 earnings per common share is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding. Diluted earnings per common share 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 incremental common shares issuable upon exercise of outstanding stock options, stock appreciation rights and non-vested restricted common shares using the treasury stock method.
Operating Segments	Operating Segments: Peoples' business activities are currently confined to one reporting unit and reportable 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, insurance, investment and trust solutions.
Stock-Based Compensation	Stock-Based Compensation: Compensation costs for stock options, restricted stock awards and stock appreciation rights are measured at the fair value of these awards on their grant date. Compensation expense is recognized over the required service period, generally the vesting period for stock options and stock appreciation rights and the restriction period for restricted stock awards. For all awards, only the expense for the portion of the awards expected to vest is recognized. For service-based awards, compensation expense for awards granted to employees who are eligible for retirement is recognized to the date the employee is first eligible to retire.
New Accounting Pronouncements	New Accounting Pronouncements: From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board ("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 financial statements taken as a whole. In September 2015, the FASB issued an accounting standards update 2015-16 - Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. The simplification eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Instead, acquirers must recognize measurement-period adjustments during the period in which they determine the amounts of such adjustments, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. For public business entities (such as Peoples), the amendments are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The amendments are to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the amendments with earlier application permitted for financial statements that have not been issued. Peoples elected to early adopt as of July 1, 2015, and will recognize measurement-period adjustments during the period in which Peoples determines the amounts of such adjustments, including the effect on earnings of any amounts that would have been recorded in previous periods if the accounting had been completed at the acquisition date. In May 2014, the FASB issued new accounting guidance that revises the criteria for determining when to recognize revenue from contracts with customers and expands disclosure requirements. This accounting guidance can be implemented using either a retrospective method or a cumulative-effect approach. In August 2015, the FASB issued an update that defers the effective date of the revenue recognition guidance by one year. This new guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for Peoples). Early adoption is permitted but only for interim and annual reporting periods beginning after December 15, 2016. Peoples has elected to implement this new accounting guidance using a cumulative-effect approach. Management's preliminary analysis suggests that the adoption of this new accounting guidance is not expected to have a material effect on Peoples' financial condition or results of operations. There are many aspects of this new accounting guidance that are still being interpreted, and the FASB has recently issued and proposed updates to certain aspects of the guidance. Therefore, the results of Peoples' preliminary analysis of the materiality of the adoption of this new accounting guidance may change based on the conclusions reached as to the application of the new accounting guidance.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2015

Business Combinations Policy [Policy Text Block]

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 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.

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 generally accepted accounting principles in the United States of America (“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. Certain items in prior financial statements have been reclassified to conform to the current presentation, which had no impact on net income, comprehensive income or loss, net cash provided by operating activities or stockholders' equity.

Consolidation

Consolidation: Peoples' Consolidated Financial Statements include subsidiaries in which Peoples has a controlling financial interest, principally defined as owning a voting interest greater than 50%. In addition, entities not controlled by voting interest or in which the equity investors do not bear the residual economic risks, but for which Peoples is the primary beneficiary are also consolidated.

The Consolidated Financial Statements include the accounts of Peoples and its consolidated subsidiaries, Peoples Bank and Peoples Investment Company, along with their wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

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 ninety days or less. Included in interest-bearing deposits in other banks were $5.0 million and $3.5 million in funds at December 31, 2015 and 2014, respectively, 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, and any resulting gain or loss, is based on the specific identification method and recognized as of the trade date.

Management 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 holding gains and losses reported in stockholders' equity as a separate component of other accumulated comprehensive income or loss, net of applicable deferred income taxes.

Certain restricted equity 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 as 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").

Management systematically evaluates investment securities for other-than-temporary declines in fair value on a quarterly basis. This analysis requires management to consider various factors, which include (1) the duration and magnitude of the decline in value, (2) the financial condition of the issuer or issuers, and (3) the structure of the security.

An impairment loss is recognized in earnings only when (1) Peoples intends to sell the debt security, (2) it is more likely than not that Peoples will be required to sell the security before recovery of its amortized cost basis, or (3) Peoples does not expect to recover the entire amortized cost basis of the security. In situations where Peoples intends to sell or when it is more likely than not that Peoples will be required to sell the security, the entire impairment loss must be recognized in earnings. In all other situations, only the portion of the impairment loss representing the credit loss must be recognized in earnings, with the remaining portion being recognized in stockholders' equity as a component of accumulated comprehensive income or loss, net of applicable deferred taxes.

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 contracts 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 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 securitizations, and certain collateralized debt obligations.

Securities Sold Under Agreements to Repurchase

Securities Sold Under Agreements to Repurchase: Peoples enters into sales of securities under agreements to repurchase (“Repurchase Agreements”) with customers and other financial service companies, which are considered financings. As such, these obligations are recorded as a liability on the Consolidated Balance Sheets and disclosed in Note 8 and Note 9. Securities pledged as collateral under Repurchase Agreements are included in investment securities on the Consolidated Balance Sheets and are disclosed in Note 3. The fair value of the collateral pledged to a third party is continually monitored and additional collateral is pledged or returned, as deemed appropriate.

Loans and Loans Held-For-Sale

Loans: Loans originated 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 and an allowance for loan losses. 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. Net deferred loan costs were $3.3 million and $2.4 million at December 31, 2015 and 2014, respectively.

A loan is considered impaired when information and events indicate it is probable that collection of all contractual principal and interest payments is doubtful. Impairment is evaluated in total for smaller-balance loans of a similar nature, primarily consumer and residential real estate loans, and on an individual loan basis for all loans to borrowers with an aggregate unpaid principal balance in excess of $1 million on an annual basis for possible credit deterioration. This loan review process provides Peoples Bank with opportunities to identify potential problem loans and take proactive actions to assure repayment of the loan or minimize Peoples Bank's risk of loss, such as reviewing the relationship more frequently based upon the loan quality rating and aggregate debt outstanding. Upon detection of the reduced ability of a borrower to meet cash flow obligations, the loan is reviewed for possible downgrade or placement on nonaccrual status. Loan relationships whose aggregate debt to Peoples Bank is equal to or less than $1 million are reviewed on an event driven basis. Triggers for review include knowledge of adverse events affecting the business, receipt of financial statements indicating deteriorating credit quality and other events. Peoples typically places any loan deemed to be impaired on nonaccrual status and allocates a specific portion of the allowance for loan losses, if necessary, to reduce the net carrying value of the loan to its estimated net realizable value. Impaired loans, or portions thereof, are charged off when deemed uncollectable. Upon detection of the reduced ability of a borrower to meet cash flow obligations, consumer and residential real estate loans typically are charged down to the net realizable value, with the residual balance placed on nonaccrual status.

Loans acquired in a business combination that have evidence of deterioration of credit quality, commonly referred to as "purchase credit impaired" loans, since origination and for which it is probable, at acquisition, that Peoples will be unable to collect all contractually required payments receivable are initially recorded at fair value (the present value of the amounts expected to be collected) with no valuation allowance. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan is recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition are not recognized. Over the life of these acquired loans, management continues to monitor each acquired purchased credit impaired loan portfolio for changes in credit quality. Increases in expected cash flows subsequent to acquisition are recognized prospectively over their remaining life as a yield adjustment on the loans. Subsequent decreases in expected cash flows are recognized as an impairment, with the amount of the expected loss included in management's evaluation of the appropriateness of the allowance for loan losses. These purchase credit impaired loans are considered to be accruing and performing even though collection of contractual payments on loans may be in doubt, as income continues to be accreted as long as expected cash flows can be reasonably estimated.

Loans acquired in a business combination that are not impaired 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 discounts (or premiums) to a loan's cost basis and are accreted (or amortized) to interest income over the loan's remaining life using the level yield method. Subsequent to the acquisition date, the methods utilized to estimate the required allowance for loan losses for these loans is similar to originated loans; however, Peoples records a provision for loan losses only when the required allowance exceeds the remaining discount.

Loans Held-for-Sale: Loans originated 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 with the intent to be held in our 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 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 loan 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 earnings.

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. The interest rate lock commitments generally terminate once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. The best efforts commitments generally terminate once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives which are generally accounted for by recognizing their estimated fair value on the Consolidated Balance Sheets as either a freestanding asset or a freestanding liability. The valuation of such commitments does not consider expected cash flows related to the servicing of the future loan. Management has determined these derivatives do not have a material effect on Peoples' financial position, results of operations or cash flows.

Allowance for Loan Losses

Allowance for Loan Losses: The allowance for loan losses is a valuation reserve established through provisions for loan losses charged against income. The allowance for loan losses is maintained at a level that management deems sufficient to absorb probable losses inherent in the loan portfolio. Loans deemed to be uncollectable are charged against the allowance for loan losses, while recoveries of previously charged-off amounts are credited to the allowance for loan losses.

The allowance for loan losses is comprised of specific valuation allowances for loans evaluated individually for impairment and general allocations for pools of homogeneous loans with similar risk characteristics and trends. Peoples' homogenous loan pools include similarly risk-graded commercial and industrial loans, similarly risk-graded commercial real estate loans, real estate construction loans (both commercial and residential), residential real estate loans, consumer home equity loans and other consumer loans. Management's evaluation of the appropriateness of the allowance for loan losses and the related provision for loan losses is based upon a quarterly analysis of the portfolio. While portions of the allowance for loan losses may be allocated to specific loans, the entire allowance for loan losses is available for any loan charged off by management.

The allowance for loan losses related to specific loans is 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. The general allocations to specific loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The calculation of historical loss rates for pools of similar loans with similar characteristics is based upon the proportion of actual charge-offs experienced to the total population of loans in the pool. The historical loss rates are periodically updated based on actual charge-off experience. The qualitative factors considered by management include, among other factors, (1) changes in local and national economic conditions, (2) changes in asset quality, (3) changes in loan portfolio volume, (4) the composition and concentrations of credit, (5) the impact of competition on loan structuring and pricing, (6) the impact of interest rate changes on portfolio risk, and (7) effectiveness of Peoples' loan policies, procedures and internal controls. The total allowance established for each homogenous loan pool represents the product of the historical loss rate and the total dollar amount of the loans in the pool.

Peoples categorizes loans involving commercial borrowers into risk categories based upon an established grading matrix. This system is used to manage the risk within its commercial lending activities, evaluate changes in the overall credit quality of the loan portfolio and evaluate the appropriateness of the allowance for loan 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. Peoples reviews, at least annually, all loan relationships with aggregate outstanding debt to Peoples of $1 million or more, and loan relationships with aggregate outstanding debt to Peoples of $5 million or more and adversely classified loans are generally 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 guarantors. The primary source of repayment for commercial real estate loans and commercial and industrial loans is normally the business's operating cash flow 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 is based largely on the borrower's ability to complete construction within the established budget.

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

Troubled Debt Restructuring

Troubled Debt Restructuring: The restructuring of a loan is considered a troubled debt restructuring ("TDR") if both (1) the borrower is experiencing financial difficulties and (2) the creditor has granted a concession. Loans acquired that are restructured after acquisition are not considered TDRs if the loans evidenced credit deterioration as of the acquisition date and are accounted for in pools of purchased credit impaired loans.

In assessing whether or not a borrower is experiencing financial difficulties, Peoples considers information currently available regarding the financial condition of the borrower. This information includes, but is not limited to, whether (1) the borrower is currently in payment default on any of the borrower's debt, (2) a payment default is probable in the foreseeable future without the modification, (3) the borrower has declared or is in the process of declaring bankruptcy, and (4) the borrower's projected cash flow is insufficient to satisfy contractual payments due under the original terms of the loan without a modification.

Peoples considers all aspects of the modification to loan terms to determine whether or not a concession has been granted to the borrower. Key factors considered by Peoples include the borrower's ability to access funds at a market rate for debt with similar risk characteristics, the significance of the modification relative to the unpaid principal balance or collateral value of the debt, and the significance of a delay in the timing of payments relative to the original contractual terms of the loan. The most common concessions granted by Peoples generally include one or more modifications to the terms of the debt, such as (1) a reduction in the interest rate for the remaining life of the debt, (2) an extension of the maturity date at an interest rate lower than the current market rate for new debt with similar risk, (3) a temporary period of interest-only payments, and (4) a reduction in the contractual payment amount for either a short period or the remaining term of the loan. All TDRs are considered impaired loans and are evaluated individually to determine if a write-down is required and if they should be on accrual or nonaccrual status.

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 of the leased facility or the estimated economic life of the improvement.

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 effective yield 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 of income tax expense. The unamortized amount of the investments is recorded in other assets and totaled $3,000 and $45,000 at December 31, 2015 and 2014, respectively.

Other Real Estate Owned

Other Real Estate Owned: Other real estate owned (“OREO”), included in other assets on the Consolidated Balance Sheets, is comprised primarily of commercial and residential real estate properties acquired by Peoples Bank 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 $0.7 million at December 31, 2015 and $0.9 million at December 31, 2014.

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets: Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired in the business combination. Goodwill is not amortized but is tested for impairment when indicators of impairment exist, or at least annually on June 30. Based upon the most recently completed goodwill impairment test, Peoples concluded the recorded value of goodwill was not impaired as of December 31, 2015, based upon the estimated fair value of Peoples' single reporting unit.

Peoples' other intangible assets consist of customer relationship and core deposit intangible assets representing the net present value of future economic benefit 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.

Mortgage Servicing Rights

Servicing Rights: Servicing rights (“SRs”) represent the right to service loans sold to third-party investors. SRs are recognized separately as a servicing asset or liability whenever Peoples undertakes an obligation to service financial assets. SRs are reported in other intangible assets on the Consolidated Balance Sheets. Serviced loans are not included in 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 SRs 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 in proportion to and 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 fair value at each reporting date. The fair value of the SRs 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.

Trust Assets Under Management

Trust Assets Under Management: Peoples Bank manages certain assets held in a fiduciary or agency capacity for customers. These assets under management, other than cash on deposit at Peoples Bank, are not included in the Consolidated Balance Sheets since they are not assets of Peoples Bank.

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. Amortization of premiums is deducted from, and accretion of discounts is added to, the related interest income. Nonrefundable loan fees and direct loan costs are deferred and recognized over the life of the loan as an adjustment of the yield.

Peoples discontinues the accrual of interest on all loans, whether or not such loans are considered past due, when management believes it is probable the borrower will be unable to meet its payment obligations as they become due, as well as when required by regulatory provisions. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest received on nonaccrual loans is included in income only if principal recovery is reasonably assured. A nonaccrual loan is restored to accrual status when it is brought current, has performed in accordance with contractual terms for a reasonable period of time, and the collectability of the total contractual principal and interest is no longer in doubt.

Other Income Recognition

Other Income Recognition: Service charges on deposits include cost recovery fees associated with services provided, such as overdraft and non-sufficient funds. Trust and investment income consists of revenue from fiduciary activities, which include fees for services such as asset management, recordkeeping, retirement services and estate management, and investment commissions and fees related to the sale of investments. Income from these activities is recognized at the time the related services are performed.

Insurance income consists of commissions and fees from the sales of insurance policies and related insurance services. Insurance income is recognized when it is earned and can be reasonably estimated. Performance-based commissions from insurance companies are recognized when received and no contingencies remain.

Income Taxes

Income Taxes: Peoples and its subsidiaries file a consolidated federal income tax return. Deferred income tax assets and liabilities are provided for temporary differences between the tax basis of an asset or liability and its reported amount in the Consolidated Financial Statements at the statutory federal 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. The components of accumulated other comprehensive income or loss included in the Consolidated Statements of Stockholders' Equity have been computed based upon a 35% federal tax rate.

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 amount of Peoples' valuation allowance and uncertain income tax positions and unrecognized benefits are disclosed in Note 12.

Advertising Costs

Advertising Costs: Advertising costs are generally expensed as incurred.

Earnings Per Share

Earnings per Share: Basic and diluted earnings per common share (“EPS”) are calculated using the two-class method since Peoples has issued some share-based payment awards 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 earnings per common share is computed by dividing net earnings allocated to common shareholders by the weighted-average number of common shares outstanding. Diluted earnings per common share 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 incremental common shares issuable upon exercise of outstanding stock options, stock appreciation rights and non-vested restricted common shares using the treasury stock method.

Operating Segments

Operating Segments: Peoples' business activities are currently confined to one reporting unit and reportable 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, insurance, investment and trust solutions.

Stock-Based Compensation

Stock-Based Compensation: Compensation costs for stock options, restricted stock awards and stock appreciation rights are measured at the fair value of these awards on their grant date. Compensation expense is recognized over the required service period, generally the vesting period for stock options and stock appreciation rights and the restriction period for restricted stock awards. For all awards, only the expense for the portion of the awards expected to vest is recognized. For service-based awards, compensation expense for awards granted to employees who are eligible for retirement is recognized to the date the employee is first eligible to retire.

New Accounting Pronouncements

New Accounting Pronouncements: From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board ("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 financial statements taken as a whole.

In September 2015, the FASB issued an accounting standards update 2015-16 - Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments. The simplification eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Instead, acquirers must recognize measurement-period adjustments during the period in which they determine the amounts of such adjustments, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. For public business entities (such as Peoples), the amendments are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. The amendments are to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the amendments with earlier application permitted for financial statements that have not been issued. Peoples elected to early adopt as of July 1, 2015, and will recognize measurement-period adjustments during the period in which Peoples determines the amounts of such adjustments, including the effect on earnings of any amounts that would have been recorded in previous periods if the accounting had been completed at the acquisition date.

In May 2014, the FASB issued new accounting guidance that revises the criteria for determining when to recognize revenue from contracts with customers and expands disclosure requirements. This accounting guidance can be implemented using either a retrospective method or a cumulative-effect approach. In August 2015, the FASB issued an update that defers the effective date of the revenue recognition guidance by one year. This new guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for Peoples). Early adoption is permitted but only for interim and annual reporting periods beginning after December 15, 2016. Peoples has elected to implement this new accounting guidance using a cumulative-effect approach. Management's preliminary analysis suggests that the adoption of this new accounting guidance is not expected to have a material effect on Peoples' financial condition or results of operations. There are many aspects of this new accounting guidance that are still being interpreted, and the FASB has recently issued and proposed updates to certain aspects of the guidance. Therefore, the results of Peoples' preliminary analysis of the materiality of the adoption of this new accounting guidance may change based on the conclusions reached as to the application of the new accounting guidance.