Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]
Basis Of Presentation	Basis Of Presentation Tompkins Financial Corporation (“Tompkins” or “the Company”) is a registered Financial Holding Company with the Federal Reserve Board pursuant to the Bank Holding Company Act of 1956, as amended, organized under the laws of New York State, and is the parent company of Tompkins Trust Company (the “Trust Company”), The Bank of Castile, Mahopac Bank, VIST Bank, and Tompkins Insurance Agencies, Inc. (“Tompkins Insurance”). The Trust Company provides a full array of trust and investment services under the Tompkins Financial Advisors brand. Unless the context otherwise requires, the term “Company” refers to Tompkins Financial Corporation and its subsidiaries. The consolidated financial information included herein combines the results of operations, the assets, liabilities, and shareholders’ equity (including comprehensive income or loss) of the Company and all entities in which the Company has a controlling financial interest. All significant intercompany balances and transactions are eliminated in consolidation. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity under U.S. generally accepted accounting principles. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity’s activities. The Company consolidates voting interest entities in which it has all, or at least a majority of, the voting interest. As defined in applicable accounting standards, variable interest entities (VIEs) are entities that lack one or more of the characteristics of a voting interest entity. A controlling financial interest in a VIE is present when the Company has both the power and ability to direct the activities of the VIE that most significantly impact the VIE’s economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. Two of the Company’s wholly owned subsidiaries, Leesport Capital Trust II and Madison Statutory Trust I, are VIE’s for which the Company is not the primary beneficiary. Accordingly, the accounts of these entities are not included in the Company’s consolidated financial statements. The consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclose contingent assets and liabilities, at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the allowance for credit losses, valuation of goodwill and intangible assets, deferred income tax assets, and obligations related to employee benefits. The consolidated financial information included herein combines the results of operations, the assets, liabilities, and shareholders’ equity of the Company and its subsidiaries. Amounts in the prior periods’ unaudited consolidated financial statements are reclassified when necessary to conform to the current periods’ presentation.
Cash and Cash Equivalents	Cash and Cash EquivalentsCash and cash equivalents in the Consolidated Statements of Cash Flows include cash and noninterest bearing balances due from banks, interest-bearing balances due from banks, Federal funds sold, and money market funds. Management regularly evaluates the credit risk associated with the counterparties to these transactions and believes that the Company is not exposed to any significant credit risk on cash and cash equivalents. Historically, each bank subsidiary is required to maintain reserve balances by the Federal Reserve Bank. However, due to the COVID-19 pandemic, the Federal Reserve Board reduced reserve requirement ratios to zero percent effective March 26, 2020. The Federal Reserve Board has stated that it has no plans to re-impose reserve requirements, but that it may adjust reserve requirements ratios in the future if conditions warrant.
Securities	Securities Management determines the appropriate classification of debt and equity securities at the time of purchase. Securities are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost. Debt securities not classified as held-to-maturity securities are classified as either available-for-sale or trading. Available-for-sale securities are stated at fair value with the unrealized gains and losses, net of tax, excluded from earnings and reported as a separate component of accumulated comprehensive income or loss, in shareholders’ equity. Trading securities are stated at fair value, with unrealized gains or losses included in earnings. Beginning January 1, 2018, upon adoption of ASU 2016-01, equity securities with readily determinable fair values are stated at fair value with realized and unrealized gains and losses reported in income. For periods prior to January 1, 2018, equity securities were classified as available-for-sale and stated at fair value with unrealized gains and losses reported as a separate component of accumulated other comprehensive income, net of tax. Securities with limited marketability or restricted equity securities, such as Federal Home Loan Bank stock and Federal Reserve Bank stock, are carried at cost, less any impairment, if any. At adoption of ASU 2016-01, the Company recognized a cumulative-effect adjustment of $65,000 for the after-tax impact of the unrealized loss on equity securities. Premiums and discounts are amortized or accreted over the expected life or call date of the related security as an adjustment to yield using the interest method. Dividend and interest income are recognized when earned. Realized gains and losses on the sale of securities are included in net gain (loss) on securities transactions. The cost of securities sold is based on the specific identification method. Beginning January 1, 2020, for available-for-sale debt securities in an unrealized loss position, at least quarterly, the Company evaluates the securities to determine whether the decline in the fair value below the amortized cost basis (impairment) is due to credit-related factors or noncredit-related factors. Any impairment that is not credit-related is recognized in other comprehensive income, net of applicable taxes. Credit-related impairment is recognized as an allowance for credit losses (“ACL”) on the Statement of Condition, limited to the amount by which the amortized cost basis exceeds the fair value, with a corresponding adjustment to earnings. Both the ACL and the adjustment to net income may be reversed if conditions change. However, if the Company intends to sell an impaired available- for-sale debt security or more likely than not will be required to sell such a security before recovering its amortized cost basis, the entire impairment amount must be recognized in earnings with a corresponding adjustment to the security’s amortized cost basis. Because the security’s amortized cost basis is adjusted to fair value, there is no ACL in this situation. Changes in the allowance for credit losses are recorded as provision (credit) for credit loss expense. Losses are charged against the ACL when management believes the uncollectability of an available-for-sale debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Prior to January 1, 2020, we regularly evaluated our debt securities to determine whether there have been any events or economic circumstances indicating that a security with an unrealized loss has suffered other-than-temporary impairment. A debt security is considered impaired if the fair value is less than its amortized cost basis at the reporting date. If impaired, the Company then assesses whether the unrealized loss is other-than-temporary. An unrealized loss on a debt security is generally deemed to be other-than-temporary and a credit loss is deemed to exist if the present value, discounted at the security’s effective rate, of the expected future cash flows is less than the amortized cost basis of the debt security. As a result, the credit loss component of an other-than-temporary impairment write-down for debt securities is recorded in earnings while the remaining portion of the impairment loss is recognized, net of tax, in other comprehensive income provided that the Company does not intend to sell the underlying debt security and it is more-likely-than not that the Company would not have to sell the debt security prior to recovery of the unrealized loss, which may be to maturity. If the Company intended to sell any securities with an unrealized loss or it is more-likely-than not that the Company would be required to sell the investment securities, before recovery of their amortized cost basis, then the entire unrealized loss would be recorded in earnings. Accrued interest receivable on securities is excluded from the estimate of credit losses.
Loans and Leases	Loans and Leases Loans are reported at their principal outstanding balance, net of deferred loan origination fees and costs, and unearned income. The Company has the ability and intent to hold its loans for the foreseeable future, except for certain residential real estate loans held-for-sale. The Company provides motor vehicle and equipment financing to its customers through direct financing leases. These leases are carried at the aggregate of lease payments receivable, plus estimated residual values, less unearned income. Unearned income on direct financing leases is amortized over the lease terms, resulting in a level rate of return. Residential real estate loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or estimated fair value. Fair value is determined on the basis of the rates quoted in the secondary market. Net unrealized losses attributable to changes in market interest rates are recognized through a valuation allowance by charges to income. Loans are generally sold on a non-recourse basis with servicing retained. Any gain or loss on the sale of loans is recognized at the time of sale as the difference between the recorded basis in the loan and the net proceeds from the sale. The Company may use commitments at the time loans are originated or identified for sale to mitigate interest rate risk. The commitments to sell loans and the commitments to originate loans held-for-sale at a set interest rate, if originated, are considered derivatives under ASC Topic 815. The impact of the estimated fair value adjustment was not significant to the consolidated financial statements. Interest income on loans is accrued and credited to income based upon the principal amount outstanding. Loan origination fees and costs are deferred and recognized over the life of the loan as an adjustment to yield. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments are due. Loans and leases, including impaired loans, are generally classified as nonaccrual if they are past due as to maturity or payment of principal or interest for a period of more than 90 days, unless such loans are well secured and in the process of collection. Loans that are past due less than 90 days may also be classified as nonaccrual if repayment in full of principal or interest is in doubt. Loans may be returned to accrual status when all principal and interest amounts contractually due (including arrearages) are reasonably assured of repayment within an acceptable time period, and there is a sustained period (generally six consecutive months) of repayment performance by the borrower in accordance with the contractual terms of the loan agreement. When interest accrual is discontinued, all unpaid accrued interest is reversed. Payments received on loans on nonaccrual are generally applied to reduce the principal balance of the loan. In general, the principal balance of a loan is charged off in full or in part when management concludes, based on the available facts and circumstances, that collection of principal in full is not probable. For commercial and commercial real estate loans, this conclusion is generally based upon a review of the borrower’s financial condition and cash flow, payment history, economic conditions, and the conditions in the various markets in which the collateral, if any, may be liquidated. In general, consumer loans are charged-off in accordance with regulatory guidelines which provide that such loans be charged-off when the Company becomes aware of the loss, such as from a triggering event that may include new information about a borrower’s intent/ability to repay the loan, bankruptcy, fraud or death, among other things, but in no case will the charge-off exceed specified delinquency timeframes. Such delinquency timeframes state that closed-end retail loans (loans with pre-defined maturity dates, such as real estate mortgages, home equity loans and consumer installment loans) that become past due 120 cumulative days and open-end retail loans (loans that roll-over at the end of each term, such as home equity lines of credit) that become past due 180 cumulative days should be classified as a loss and charged-off. For residential real estate loans, charge-off decisions are based upon past due status, current assessment of collateral value, and general market conditions in the areas where the properties are located.
Acquired Loans	Acquired Loans Acquired loans are recorded at fair value at the date of acquisition based on a discounted cash flow methodology that considers various factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan and whether or not the loan was amortizing, and a discount rate reflecting the Company’s assessment of risk inherent in the cash flow estimates. Certain larger purchased loans are individually evaluated while other purchased loans are grouped together according to similar risk characteristics and are treated in the aggregate when applying various valuation techniques. These cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change. Prior to January 1, 2020, loans acquired in a business combination that had evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that the Company would be unable to collect all contractually required payments receivable were considered purchased credit impaired (“PCI”) loans. PCI loans were individually evaluated and recorded at fair value at the date of acquisition with no initial valuation allowance based on a discounted cash flow methodology that considered various factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan and whether or not the loan was amortizing, and a discount rate reflecting the Company’ assessment of risk inherent in the cash flow estimates. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” was recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceeded the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” were not recognized on the Statement of Condition and did not result in any yield adjustments, loss accruals or valuation allowances. Increases in expected cash flows, including prepayments, subsequent to the initial investment were recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows were recognized as impairment. Valuation allowances on PCI loans reflected only losses incurred after the acquisition (meaning the present value of all cash flows expected at acquisition that ultimately were not to be received). Commencing January 1, 2020, in connection with the Company's adoption of ASU 2016-13, loans acquired in a business combination that have experienced more-than-insignificant deterioration in credit quality since origination are considered purchased credit deteriorated (“PCD”) loans. At the acquisition date, an estimate of expected credit losses is made for groups of PCD loans with similar risk characteristics and individual PCD loans without similar risk characteristics. This initial allowance for credit losses is allocated to individual PCD loans and added to the purchase price or acquisition date fair values to establish the initial amortized cost basis of the PCD loans. As the initial allowance for credit losses is added to the purchase price, there is no credit loss expense recognized upon acquisition of a PCD loan. Any difference between the unpaid principal balance of PCD loans and the amortized cost basis is considered to relate to noncredit factors and results in a discount or premium. Discounts and premiums are recognized through interest income on a level-yield method over the life of the loans. All loans considered to be PCI prior to January 1, 2020 were converted to PCD on that date. The subsequent measurement of expected credit losses for all acquired loans is the same as the subsequent measurement of expected credit losses for originated loans.
Allowance for Credit Losses - Loans	Allowance for Credit Losses – Loans The Company adopted ASU 2016-13 on January 1, 2020 using the modified retrospective approach. The Company recorded a net increase to retained earnings of $1.7 million, upon adoption. The transition adjustment includes a decrease in the allowance for credit losses on loans of $2.5 million, and an increase in the allowance for credit losses on off-balance sheet credit exposures of $0.4 million, net of the corresponding decrease in deferred tax assets of $0.4 million. Results for the periods beginning after January 1, 2020 are presented under Accounting Standards Codification (“ASC”) 326 and follows the current expected credit loss methodology. Prior periods continue to be reported in accordance with previously applicable U.S. GAAP, which followed the incurred credit losses methodology. The following policies noted are under the current expected credit losses methodology. A summary of the Company's previous policies under the incurred credit losses methodology follows at the end of this section. Under the current expected credit loss model, the ACL on loans is a valuation allowance estimated at the balance sheet date in accordance with U.S. GAAP that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. The Company estimates the ACL on loans based on the underlying assets’ amortized cost basis, which is the amount at which the financing receivable is originated or acquired, adjusted for applicable accretion or amortization of premium, discount, collection of cash, and charge-offs. In the event that collection of principal becomes uncertain, the Company has policies in place to reverse accrued interest in a timely manner. Therefore, the Company has made a policy election to exclude accrued interest from the amortized cost basis. Expected credit losses are reflected in the ACL through a charge to the provision for credit loss expense. When the Company deems all or a portion of a financial asset to be uncollectible, the appropriate amount is written off and the ACL is reduced by the same amount. In general, the principal balance of a loan is charged off in full or in part when management concludes, based on the available facts and circumstances, that collection of principal in full is not probable. In addition, the Company has reserves for expected recoveries where the Company reviews the prior four quarter charge offs and applies a recovery rate based on the Company’s historical experience. Subsequent recoveries, if any, are credited to the ACL when received. The Company measures expected credit losses of financial assets at the loan level by segment, by pooling loans when the financial assets share similar risk characteristics. Depending on the nature of the pool of financial assets with similar risk characteristics, the Company uses a discounted cash flow (“DCF”) method to estimate the expected credit losses. Allowance on loans that do not share risk characteristics are evaluated on an individual basis. The Company assigns a credit risk rating to all commercial and commercial real estate loans. The Company reviews commercial and commercial real estate loans rated Substandard or worse, on nonaccrual, and greater than $250,000 for loss potential and when deemed appropriate, and assigns an allowance based on an individual evaluation. The Company’s methodologies for estimating the ACL consider available relevant information about the collectability of cash flows, including information about past events, current conditions, and reasonable and supportable forecasts. The methodologies apply historical loss information, adjusted for asset-specific characteristics, economic conditions at the measurement date, and forecasts about future economic conditions expected to exist through the contractual lives of the financial assets that are reasonable and supportable, to the identified pools of financial assets with similar risk characteristics for which the historical loss experience was observed. The Company’s methodologies revert back to average historical loss information on a straight line basis over eight quarters when it can no longer develop reasonable and supportable forecasts. The Company has identified the following pools of financial assets with similar risk characteristics for measuring expected credit losses: commercial, commercial real estate, residential, home equity, consumer and leases. This segmentation was selected based on the differences in the risk profile of each of these categories and aligns well with regulatory reporting categories. This segmentation separates borrower type, collateral type and the nature of the loan. The differences in risk profiles of these segments enable the ACL to be more precise in its allocation due to the inherent risk in these specific portfolios. Discounted Cash Flow Method The Company uses the DCF method to estimate expected credit losses for the commercial, commercial real estate, residential, home equity, and consumer loan pools. For each of these loan segments, the Company generates cash flow projections at the instrument level wherein payment expectations are adjusted for exposure at default using estimated prepayment speeds, time to recovery, probability of default, and loss given default. The modeling of expected prepayment speeds, and time to recovery are based on historical internal data. The Company uses regression analysis of historical internal and peer data to determine suitable loss drivers to utilize when modeling lifetime probability of default and loss given default. This analysis also determines how expected probability of default and loss given default will react to forecasted levels of the loss drivers. For all loan pools utilizing the DCF method, management utilizes and forecasts national unemployment and a one year percentage change in national gross domestic product as loss drivers in the model. For all DCF models, management has determined that four quarters represents a reasonable and supportable forecast period and reverts back to a historical loss rate over eight quarters on a straight-line basis. Management leverages economic projections from an independent third party to inform its loss driver forecasts over the four-quarter forecast period. Other internal and external indicators of economic forecasts, and scenario weightings, are also considered by management when developing the forecast metrics. The model considers a base case forecast and two alternative forecasts and assigns weightings to these three scenarios based on current conditions and expectations for future conditions. The combination of adjustments for credit expectations (default and loss) and timing expectations (prepayment, curtailment, and time to recovery) produces an expected cash flow stream at the instrument level. Instrument effective yield is calculated, net of the impacts of prepayment assumptions, and the instrument expected cash flows are then discounted at that effective yield to produce an instrument-level net present value of expected cash flows (“NPV”). An ACL is established for the difference between the instrument’s NPV and amortized cost basis. The model also considers the need to qualitatively adjust expected loss estimates for information not already captured in the loss estimation process. These qualitative factors include, but are not limited to, those suggested by the Interagency Policy Statement on Allowances for Credit Losses. These qualitative factor adjustments may increase or decrease the Company's estimate of expected credit losses. At December 31, 2020, the ACL model included increases in qualitative reserves for loans within the hospitality and other certain industries that may have an elevated level of risk due to the adverse economic impact of the COVID-19 pandemic, as well as loans that remain in the Company's payment deferral program implemented in response to the COVID-19 pandemic. The qualitative reserves were added to all portfolio segments with the majority in commercial real estate and then residential real estate. Due to the size and characteristics of the leasing portfolio, the remaining life method, using the historical loss rate of the commercial and industrial segment, is used to determine the allowance for credit losses. Individually Evaluated Financial Assets Loans that do not share common risk characteristics are evaluated on an individual basis. For collateral dependent financial assets where the Company has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and the Company expects repayment of the financial asset to be provided substantially through the operation or sale of the collateral, the ACL is measured based on the difference between the fair value of the collateral less cost to sell, and the amortized cost basis of the asset as of the measurement date. The ACL may be zero if the fair value of the collateral at the measurement date exceeds the amortized cost basis of the financial asset. The Company’s estimate of the ACL reflects losses expected over the remaining contractual life of the assets. The contractual term does not consider extensions, renewals or modifications unless the Company has identified an expected troubled debt restructuring. Under the incurred credit losses methodology utilized in the prior periods, the allowance for loans and leases was maintained at an amount to assure that an appropriate allowance was maintained. The methodology was comprised of four major components that management had deemed appropriate in evaluating the appropriateness of the allowance for loan and lease losses. The components included: impaired loans; criticized and classified credits; historical loss experience; and qualitative or subjective analysis. For impaired loans, an allowance was recognized if the fair value of the loan was less than the recorded investment in the loan (recorded investment in the loan is the principal balance plus any accrued interest, net of deferred loan fees or costs and unamortized premium or discount). For loans that were not impaired or reviewed individually, management assigned a reserve based upon historical loss experience over a designated look-back period. Management had evaluated a variety of look-back periods and had determined that an eight year look back period was appropriate to capture a full range of economic cycles. Management had also evaluated a variety of statistical methods in analyzing loss history, including averages, weighted averages and loss emergence periods and had determined that by applying a loss emergence period analysis to historical losses over a full economic cycle had resulted in a reasonable estimate of losses inherent in the loan portfolio. The model also included an analysis of a variety of subjective factors to support the reserve estimate. These subjective factors included allowance allocations for risks that may not otherwise be fully recognized in other components of the model. Among the subjective factors that were routinely considered as part of this analysis were: growth trends in the portfolio, changes in management and/or polices related to lending activities, trends in classified or nonaccrual loans, concentrations of credit, local and national economic trends, and industry trends. For acquired credit impaired loans accounted for under FASB ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, (“ASC Topic 310-30”), the Company’s allowance for loan and lease losses was estimated based upon our expected cash flows for these loans. To the extent that we experienced a deterioration in borrower credit quality resulting in a decrease in our expected cash flows subsequent to the acquisition of the loans, an allowance for loan losses would be established based on our estimate of future credit losses over the remaining life of the loans. For acquired non-credit impaired loans accounted for under FASB ASC Topic 310-20, Nonrefundable Fees and Other Costs, (“ASC Topic 310-20”), the Company’s allowance for loan and lease losses was maintained through provisions for loan losses based upon an evaluation process that was similar to our evaluation process used for originated loans. This evaluation, which included a review of loans on which full collectability may not be reasonably assured, it considered, among other matters, the estimated fair value of the underlying collateral, economic conditions, historical net loan loss experience, carrying value of the loans, which included the remaining net purchase discount or premium, and other factors that warrant recognition in determining our allowance for loan losses. Troubled Debt Restructuring A loan that has been modified or renewed is considered a troubled debt restructuring (“TDR”) when two conditions are met: 1) the borrower is experiencing financial difficulty and 2) concessions are made for the borrower's benefit that would not otherwise be considered for a borrower or transaction with similar credit risk characteristics. The Company’s ACL reflects all effects of a TDR when an individual asset is specifically identified as a reasonably expected TDR. The Company has determined that a TDR is reasonably expected no later than the point when the lender concludes that modification is the best course of action and it is at least reasonably possible that the troubled borrower will accept some form of concession from the lender to avoid a default. Reasonably expected TDRs and executed non-performing TDRs are evaluated individually to determine the required ACL. TDRs performing in accordance with their modified contractual terms for a reasonable period of time may be included in the Company’s existing pools based on the underlying risk characteristics of the loan to measure the ACL. The provisions of the CARES Act and interagency guidance issued by Federal banking regulators provided guidance and clarification related to modifications and deferral programs to assist borrowers who are negatively impacted by the COVID-19 national emergency. Under the CARES Act, a modification deemed to be COVID-19-related is not considered to be a TDR if the loan was not more than 30 days past due as of December 31, 2019 and the deferral was executed between March 1, 2020 and the earlier of 60 days after the date of termination of the COVID-19 national emergency or December 31, 2020. The Consolidated Appropriations Act, 2021 extended the termination of these provisions to the earlier of 60 days after the COVID-19 national emergency date or January 1, 2022. The banking regulators issued similar guidance, which clarified that a COVID-19-related modification should not be considered a TDR if the borrower was current on payments at the time the underlying loan modification program was implemented and if the modification was considered to be short-term. In accordance with the CARES Act and the interagency guidance, the Company does not designate eligible loan modifications and deferrals resulting from the impacts of COVID-19 as TDRs. The Company evaluates modifications for eligibility under the CARES Act, then the interagency guidance if they do not qualify for the CARES Act relief. Modifications that are not eligible for either program continue to follow the Corporation’s established TDR policy. Additionally, loans with deferrals granted due to COVID-19 are not generally reported as past due or nonaccrual. Loan Commitments and Allowance for Credit Losses on Off-Balance Sheet Credit Exposures Financial instruments include off-balance sheet credit instruments, such as commitments to make loans, unused lines of credit and commercial letters of credit, issued to meet customer financing needs. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for off-balance sheet loan commitments is represented by the contractual amount of those instruments. Such financial instruments are recorded when they are funded. The Company records an allowance for credit losses on off-balance sheet credit exposures, unless the commitments to extend credit are unconditionally cancellable, through a charge to the provision for credit loss expense for off-balance sheet credit exposures included in other noninterest expense in the Company’s Consolidated Statements of Income. The ACL on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date under the current expected credit loss model using similar methodologies as portfolio loans, taking into consideration the likelihood that funding will occur, and is included in other liabilities on the Company’s Statements of Condition.
Premises and Equipment	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost, less allowances for depreciation. The provision for depreciation for financial reporting purposes is computed generally by the straight-line method at rates sufficient to write-off the cost of such assets over their estimated useful lives. Buildings are amortized over a period of 10-39 years, and furniture, fixtures, and equipment are amortized over a period of 2-20 years. Leasehold improvements are generally depreciated over the lesser of the lease term or the estimated lives of the improvements. Maintenance and repairs are charged to expense as incurred. Gains or losses on disposition are reflected in earnings.
Other Real Estate Owned	Other Real Estate Owned Other real estate owned consists of properties formerly pledged as collateral to loans, which have been acquired by the Company through foreclosure proceedings or acceptance of a deed in lieu of foreclosure. Upon transfer of a loan to foreclosure status, an appraisal is generally obtained and any excess of the loan balance over the fair value, less estimated costs to sell, is charged against the allowance for credit losses. Expenses and subsequent adjustments to the fair value are treated as other operating expense.
Goodwill	GoodwillGoodwill represents the excess of purchase price over the fair value of assets acquired in a transaction using purchase accounting. Goodwill has an indefinite useful life and is not amortized, but is tested for impairment. Goodwill impairment tests are performed on an annual basis or when events or circumstances dictate. On January 1, 2020, the Company adopted ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment", which eliminates the entities requirement to compute the implied fair value. The Company tests goodwill annually as of December 31st. The Company has the option to perform a qualitative assessment of goodwill, which considers company-specific and economic characteristics that might impact its carrying value. If based on this qualitative assessment, it is more likely than not that the fair value of the reporting unit is less than its carrying amount, then a quantitative test (Step 1) is performed, which compares the fair value of the reporting unit to the carrying amount of the reporting unit in order to identify potential impairment. If the estimated fair value of a reporting unit exceeds its carrying amount, the goodwill of the reporting unit is not considered impaired. The implied fair value of goodwill is determined in the same manner as goodwill that is recognized in a business combination. Significant judgment and estimates are involved in estimating the fair value of the assets and liabilities of the reporting units.
Other Intangible Assets	Other Intangible Assets Other intangible assets include core deposit intangibles, customer related intangibles, covenants not to compete, and mortgage servicing rights. Core deposit intangibles represent a premium paid to acquire a base of stable, low cost deposits in the acquisition of a bank, or a bank branch, using purchase accounting. The amortization period for core deposit intangible ranges from 5 to 10 years, using an accelerated method. The covenants not to compete are amortized on a straight-line basis over 3 to 6 years, while customer related intangibles are amortized on an accelerated basis over a range of 6 to 15 years. The amortization period is monitored to determine if circumstances require such periods to be revised. The Company periodically reviews its intangible assets for changes in circumstances that may indicate the carrying amount of the asset is impaired. The Company tests its intangible assets for impairment on an annual basis or more frequently if conditions indicate that an impairment loss has more likely than not been incurred.
Income Taxes	Income Taxes Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred taxes are reviewed quarterly and reduced by a valuation allowance if, based upon the information available, it is more likely than not that some or all of the deferred tax assets will not 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. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized. The Company’s policy is to recognize interest and penalties on unrecognized tax benefits in income tax expense in the Consolidated Statements of Income.
Tax Credit Investments	Tax Credit InvestmentsThe Company accounts for its investments in qualified affordable housing projects using the proportional amortization method. Under that method, the Company amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense.
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase (repurchase agreements) are agreements in which the Company transfers the underlying securities to a third-party custodian’s account that explicitly recognizes the Company’s interest in the securities. The agreements are accounted for as secured financing transactions provided the Company maintains effective control over the transferred securities and meets other criteria as specified in FASB ASC Topic 860, Transfers and Servicing (“ASC Topic 860”). The Company’s agreements are accounted for as secured financings; accordingly, the transaction proceeds are reflected as liabilities and the securities underlying the agreements continue to be carried in the Company’s securities portfolio.
Treasury Stock	Treasury Stock The cost of treasury stock is shown on the Consolidated Statements of Condition as a separate component of shareholders’ equity, and is a reduction to total shareholders’ equity. Shares are released from treasury at fair value, identified on an average cost basis.
Trust and Investment Services	Trust and Investment Services Assets held in fiduciary or agency capacities for customers are not included in the accompanying Consolidated Statements of Condition, since such items are not assets of the Company. Fees associated with providing trust and investment services are included in noninterest income. Additional information on trust and investment fees is presented in Note 14 - "Revenue Recognition."
Earnings Per Share	Earnings Per Share Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of shares outstanding during the year, exclusive of shares represented by the unvested portion of restricted stock and restricted stock units. Diluted earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of shares outstanding during the year plus the dilutive effect of the unvested portion of restricted stock and restricted stock units and stock issuable upon conversion of common stock equivalents (primarily stock options) or certain other contingencies. The Company uses authoritative accounting guidance under ASC Topic 260, Earnings Per Share, which provides that unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of earnings per share pursuant to the two-class method. The Company issues stock-based compensation awards that included restricted stock awards that contain such rights.
Segment Reporting	Segment ReportingThe Company manages its operations through three reportable business segments in accordance with the standards set forth in FASB ASC Topic 280, “Segment Reporting”. The three segments are: (i) banking (“Banking”), (ii) insurance (“Tompkins Insurance Agencies, Inc.”) and (iii) wealth management (“Tompkins Financial Advisors”). The Company’s insurance services and wealth management services are managed separately from the Bank.
Comprehensive Income (Loss)	Comprehensive Income (Loss) For the Company, comprehensive income (loss) represents net income plus the net change in unrealized gains or losses on available-for-sale debt securities for the period (net of taxes), and the actuarial gain or loss and amortization of unrealized amounts in the Company’s defined-benefit retirement and pension plan, supplemental employee retirement plan, and post-retirement life and healthcare benefit plan (net of taxes), and is presented in the Consolidated Statements of Comprehensive Income (Loss) and Consolidated Statements of Changes in Shareholders’ Equity. Accumulated other comprehensive income (loss) represents the net unrealized gains or losses on available-for-sale debt securities (net of tax) and unrecognized net actuarial gain or loss, unrecognized prior service costs, and unrecognized net initial obligation (net of tax) in the Company’s defined-benefit retirement and pension plan, supplemental employee retirement plan, and post-retirement life and healthcare benefit plan.
Pension and Other Employee Benefits	Pension and Other Employee Benefits The Company maintains noncontributory defined-benefit and defined contribution plans, which cover substantially all employees of the Company. In addition, the Company also maintains supplemental employee retirement plans for certain executives and a post-retirement life and healthcare plan. These plans are discussed in detail in Note 11 “Employee Benefit Plans”. The Company incurs certain employment-related expenses associated with these plans. In order to measure the expense associated with these plans, various assumptions are made including the discount rate used to value certain liabilities, expected return on plan assets, anticipated mortality rates, and expected future healthcare costs. The assumptions are based on historical experience as well as current facts and circumstances. A third-party actuarial firm is used to assist management in measuring the expense and liability associated with the plans. The Company uses a December 31 measurement date for its plans. As of the measurement date, plan assets are determined based on fair value, generally representing observable market prices. The projected benefit obligation is primarily determined based on the present value of projected benefit distributions at an assumed discount rate. The expenses associated with these plans are charged to current operating expenses. The Company recognizes an asset for a plan’s overfunded status or a liability for a plan’s underfunded status in the Company’s consolidated statements of condition, and recognizes changes in the funded status of these plans in comprehensive income, net of applicable taxes, in the year in which the change occurred.
Fair Value Measurements	Fair Value Measurements The Company accounts for the provisions of FASB ASC Topic 820, Fair Value Measurements and Disclosures (“ASC Topic 820”), for financial assets and financial liabilities. ASC Topic 820 defines fair value, establishes a framework for measuring fair value in accordance with U.S. GAAP, and expands disclosures about fair value measurements. See Note 19 “Fair Value Measurements”. In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among others.
Revenue Recognition	Revenue RecognitionTompkins adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606) as of January 1, 2018 using the modified retrospective method for all contracts. Results for reporting periods beginning January 1, 2018 are presented under ASC 606, while prior period amounts were not adjusted and continue to be reported in accordance with the Company’s historic accounting under Topic 605, Revenue Recognition. The Company recorded a net increase to beginning retained earnings of $1.8 million as of January 1, 2018 due to the cumulative impact of adopting ASC 606. The impact on beginning retained earnings was primarily driven by the recognition of $1.8 million of contingency income related to our insurance business segment. Under ASU 2014-09, effective January 1, 2018, the Company adopted new policies related to revenue recognition. In general, for revenue not associated with financial instruments, guarantees and lease contracts, the Company applies the following steps when recognizing revenue from contracts with customers: (i) identify the contract, (ii) identify the performance obligations, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when a performance obligation is satisfied. Tompkins' contracts with customers are generally short term in nature, typically due within one year or less or cancellable by the Company or the Company's customer upon a short notice period. Performance obligations for the Company's customer contracts are generally satisfied at a single point in time, typically when the transaction is complete, or over time. For performance obligations satisfied over time, Tompkins primarily uses the output method, directly measuring the value of the products/services transferred to the customer, to determine when performance obligations have been satisfied. The Company typically receives payment from customers and recognizes revenue concurrent with the satisfaction of the Company's performance obligations. In most cases, this occurs within a single financial reporting period. For payments received in advance of the satisfaction of performance obligations, revenue recognition is deferred until such time as the performance obligations have been satisfied. In cases where the Company has not received payment despite satisfaction of the Company's performance obligations, the Company accrues an estimate of the amount due in the period the Company's performance obligations have been satisfied. For contracts with variable components, only amounts for which collection is probable are accrued. The Company generally acts in a principal capacity, on the Company's own behalf, in most of the Company's contracts with customers. In such transactions, Tompkins recognizes revenue and the related costs to provide the services on a gross basis in the Company's financial statements. In some cases, Tompkins acts in an agent capacity, deriving revenue through assisting other entities in transactions with the Company's customers. In such transactions, Tompkins recognizes revenue and the related costs to provide the services on a net basis in the Company's financial statements. These transactions recognized on a net basis primarily relate to insurance and brokerage commissions and fees derived from the Company's customers' use of various interchange and ATM/debit card networks.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Tompkins Financial Corporation (“Tompkins” or “the Company”) is a registered Financial Holding Company with the Federal Reserve Board pursuant to the Bank Holding Company Act of 1956, as amended, organized under the laws of New York State, and is the parent company of Tompkins Trust Company (the “Trust Company”), The Bank of Castile, Mahopac Bank, VIST Bank, and Tompkins Insurance Agencies, Inc. (“Tompkins Insurance”). The Trust Company provides a full array of trust and investment services under the Tompkins Financial Advisors brand. Unless the context otherwise requires, the term “Company” refers to Tompkins Financial Corporation and its subsidiaries.

The consolidated financial information included herein combines the results of operations, the assets, liabilities, and shareholders’ equity (including comprehensive income or loss) of the Company and all entities in which the Company has a controlling financial interest. All significant intercompany balances and transactions are eliminated in consolidation.

The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity under U.S. generally accepted accounting principles. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity’s activities. The Company consolidates voting interest entities in which it has all, or at least a majority of, the voting interest. As defined in applicable accounting standards, variable interest entities (VIEs) are entities that lack one or more of the characteristics of a voting interest entity. A controlling financial interest in a VIE is present when the Company has both the power and ability to direct the activities of the VIE that most significantly impact the VIE’s economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. Two of the Company’s wholly owned subsidiaries, Leesport Capital Trust II and Madison Statutory Trust I, are VIE’s for which the Company is not the primary beneficiary. Accordingly, the accounts of these entities are not included in the Company’s consolidated financial statements.

The consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclose contingent assets and liabilities, at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the allowance for credit losses, valuation of goodwill and intangible assets, deferred income tax assets, and obligations related to employee benefits.

The consolidated financial information included herein combines the results of operations, the assets, liabilities, and shareholders’ equity of the Company and its subsidiaries. Amounts in the prior periods’ unaudited consolidated financial statements are reclassified when necessary to conform to the current periods’ presentation.

Cash and Cash Equivalents

Cash and Cash EquivalentsCash and cash equivalents in the Consolidated Statements of Cash Flows include cash and noninterest bearing balances due from banks, interest-bearing balances due from banks, Federal funds sold, and money market funds. Management regularly evaluates the credit risk associated with the counterparties to these transactions and believes that the Company is not exposed to any significant credit risk on cash and cash equivalents. Historically, each bank subsidiary is required to maintain reserve balances by the Federal Reserve Bank. However, due to the COVID-19 pandemic, the Federal Reserve Board reduced reserve requirement ratios to zero percent effective March 26, 2020. The Federal Reserve Board has stated that it has no plans to re-impose reserve requirements, but that it may adjust reserve requirements ratios in the future if conditions warrant.

Securities

Management determines the appropriate classification of debt and equity securities at the time of purchase. Securities are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost. Debt securities not classified as held-to-maturity securities are classified as either available-for-sale or trading. Available-for-sale securities are stated at fair value with the unrealized gains and losses, net

of tax, excluded from earnings and reported as a separate component of accumulated comprehensive income or loss, in shareholders’ equity. Trading securities are stated at fair value, with unrealized gains or losses included in earnings.

Beginning January 1, 2018, upon adoption of ASU 2016-01, equity securities with readily determinable fair values are stated at fair value with realized and unrealized gains and losses reported in income. For periods prior to January 1, 2018, equity securities were classified as available-for-sale and stated at fair value with unrealized gains and losses reported as a separate component of accumulated other comprehensive income, net of tax. Securities with limited marketability or restricted equity securities, such as Federal Home Loan Bank stock and Federal Reserve Bank stock, are carried at cost, less any impairment, if any. At adoption of ASU 2016-01, the Company recognized a cumulative-effect adjustment of $65,000 for the after-tax impact of the unrealized loss on equity securities.

Premiums and discounts are amortized or accreted over the expected life or call date of the related security as an adjustment to yield using the interest method. Dividend and interest income are recognized when earned. Realized gains and losses on the sale of securities are included in net gain (loss) on securities transactions. The cost of securities sold is based on the specific identification method.

Beginning January 1, 2020, for available-for-sale debt securities in an unrealized loss position, at least quarterly, the Company evaluates the securities to determine whether the decline in the fair value below the amortized cost basis (impairment) is due to credit-related factors or noncredit-related factors. Any impairment that is not credit-related is recognized in other comprehensive income, net of applicable taxes. Credit-related impairment is recognized as an allowance for credit losses (“ACL”) on the Statement of Condition, limited to the amount by which the amortized cost basis exceeds the fair value, with a corresponding adjustment to earnings. Both the ACL and the adjustment to net income may be reversed if conditions change. However, if the Company intends to sell an impaired available- for-sale debt security or more likely than not will be required to sell such a security before recovering its amortized cost basis, the entire impairment amount must be recognized in earnings with a corresponding adjustment to the security’s amortized cost basis. Because the security’s amortized cost basis is adjusted to fair value, there is no ACL in this situation. Changes in the allowance for credit losses are recorded as provision (credit) for credit loss expense. Losses are charged against the ACL when management believes the uncollectability of an available-for-sale debt security is confirmed or when either of the criteria regarding intent or requirement to sell is met.

Prior to January 1, 2020, we regularly evaluated our debt securities to determine whether there have been any events or economic circumstances indicating that a security with an unrealized loss has suffered other-than-temporary impairment. A debt security is considered impaired if the fair value is less than its amortized cost basis at the reporting date. If impaired, the Company then assesses whether the unrealized loss is other-than-temporary. An unrealized loss on a debt security is generally deemed to be other-than-temporary and a credit loss is deemed to exist if the present value, discounted at the security’s effective rate, of the expected future cash flows is less than the amortized cost basis of the debt security. As a result, the credit loss component of an other-than-temporary impairment write-down for debt securities is recorded in earnings while the remaining portion of the impairment loss is recognized, net of tax, in other comprehensive income provided that the Company does not intend to sell the underlying debt security and it is more-likely-than not that the Company would not have to sell the debt security prior to recovery of the unrealized loss, which may be to maturity. If the Company intended to sell any securities with an unrealized loss or it is more-likely-than not that the Company would be required to sell the investment securities, before recovery of their amortized cost basis, then the entire unrealized loss would be recorded in earnings.

Accrued interest receivable on securities is excluded from the estimate of credit losses.

Loans and Leases

Loans are reported at their principal outstanding balance, net of deferred loan origination fees and costs, and unearned income. The Company has the ability and intent to hold its loans for the foreseeable future, except for certain residential real estate loans held-for-sale. The Company provides motor vehicle and equipment financing to its customers through direct financing leases. These leases are carried at the aggregate of lease payments receivable, plus estimated residual values, less unearned income. Unearned income on direct financing leases is amortized over the lease terms, resulting in a level rate of return.

Residential real estate loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or estimated fair value. Fair value is determined on the basis of the rates quoted in the secondary market. Net unrealized losses attributable to changes in market interest rates are recognized through a valuation allowance by charges to income. Loans are generally sold on a non-recourse basis with servicing retained. Any gain or loss on the sale of loans is recognized at the time of sale as the difference between the recorded basis in the loan and the net proceeds from the sale. The Company may use commitments at the time loans are originated or identified for sale to mitigate interest rate risk. The commitments to sell loans and the commitments to originate loans held-for-sale at a set interest rate, if originated, are considered derivatives under ASC Topic 815. The impact of the estimated fair value adjustment was not significant to the consolidated financial statements.

Interest income on loans is accrued and credited to income based upon the principal amount outstanding. Loan origination fees and costs are deferred and recognized over the life of the loan as an adjustment to yield. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments are due. Loans and leases, including impaired loans, are generally classified as nonaccrual if they are past due as to maturity or payment of principal or interest for a period of more than 90 days, unless such loans are well secured and in the process of collection. Loans that are past due less than 90 days may also be classified as nonaccrual if repayment in full of principal or interest is in doubt.

Loans may be returned to accrual status when all principal and interest amounts contractually due (including arrearages) are reasonably assured of repayment within an acceptable time period, and there is a sustained period (generally six consecutive months) of repayment performance by the borrower in accordance with the contractual terms of the loan agreement. When interest accrual is discontinued, all unpaid accrued interest is reversed. Payments received on loans on nonaccrual are generally applied to reduce the principal balance of the loan.

In general, the principal balance of a loan is charged off in full or in part when management concludes, based on the available facts and circumstances, that collection of principal in full is not probable. For commercial and commercial real estate loans, this conclusion is generally based upon a review of the borrower’s financial condition and cash flow, payment history, economic conditions, and the conditions in the various markets in which the collateral, if any, may be liquidated. In general, consumer loans are charged-off in accordance with regulatory guidelines which provide that such loans be charged-off when the Company becomes aware of the loss, such as from a triggering event that may include new information about a borrower’s intent/ability to repay the loan, bankruptcy, fraud or death, among other things, but in no case will the charge-off exceed specified delinquency timeframes. Such delinquency timeframes state that closed-end retail loans (loans with pre-defined maturity dates, such as real estate mortgages, home equity loans and consumer installment loans) that become past due 120 cumulative days and open-end retail loans (loans that roll-over at the end of each term, such as home equity lines of credit) that become past due 180 cumulative days should be classified as a loss and charged-off. For residential real estate loans, charge-off decisions are based upon past due status, current assessment of collateral value, and general market conditions in the areas where the properties are located.

Acquired Loans

Acquired loans are recorded at fair value at the date of acquisition based on a discounted cash flow methodology that considers various factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan and whether or not the loan was amortizing, and a discount rate reflecting the Company’s assessment of risk inherent in the cash flow estimates. Certain larger purchased loans are individually evaluated while other purchased loans are grouped together according to similar risk characteristics and are treated in the aggregate when applying various valuation techniques. These cash flow evaluations are inherently subjective as they require material estimates, all of which may be susceptible to significant change.

Prior to January 1, 2020, loans acquired in a business combination that had evidence of deterioration of credit quality since origination and for which it was probable, at acquisition, that the Company would be unable to collect all contractually required payments receivable were considered purchased credit impaired (“PCI”) loans. PCI loans were individually evaluated and recorded at fair value at the date of acquisition with no initial valuation allowance based on a discounted cash flow methodology that considered various factors including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan and whether or not the loan was amortizing, and a discount rate reflecting the Company’ assessment of risk inherent in the cash flow estimates. The difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” was recognized as interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceeded the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” were not recognized on the Statement of Condition and did not result in any yield adjustments, loss accruals or valuation allowances. Increases in expected cash flows, including prepayments, subsequent to the initial investment were recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows were recognized as impairment. Valuation allowances on PCI loans reflected only losses incurred after the acquisition (meaning the present value of all cash flows expected at acquisition that ultimately were not to be received).

Commencing January 1, 2020, in connection with the Company's adoption of ASU 2016-13, loans acquired in a business combination that have experienced more-than-insignificant deterioration in credit quality since origination are considered purchased credit deteriorated (“PCD”) loans. At the acquisition date, an estimate of expected credit losses is made for groups of PCD loans with similar risk characteristics and individual PCD loans without similar risk characteristics. This initial allowance for credit losses is allocated to individual PCD loans and added to the purchase price or acquisition date fair values to establish the initial amortized cost basis of the PCD loans. As the initial allowance for credit losses is added to the purchase price, there is

no credit loss expense recognized upon acquisition of a PCD loan. Any difference between the unpaid principal balance of PCD loans and the amortized cost basis is considered to relate to noncredit factors and results in a discount or premium. Discounts and premiums are recognized through interest income on a level-yield method over the life of the loans. All loans considered to be PCI prior to January 1, 2020 were converted to PCD on that date.

The subsequent measurement of expected credit losses for all acquired loans is the same as the subsequent measurement of expected credit losses for originated loans.

Allowance for Credit Losses - Loans

Allowance for Credit Losses – Loans

The Company adopted ASU 2016-13 on January 1, 2020 using the modified retrospective approach. The Company recorded a net increase to retained earnings of $1.7 million, upon adoption. The transition adjustment includes a decrease in the allowance for credit losses on loans of $2.5 million, and an increase in the allowance for credit losses on off-balance sheet credit exposures of $0.4 million, net of the corresponding decrease in deferred tax assets of $0.4 million. Results for the periods beginning after January 1, 2020 are presented under Accounting Standards Codification (“ASC”) 326 and follows the current expected credit loss methodology. Prior periods continue to be reported in accordance with previously applicable U.S. GAAP, which followed the incurred credit losses methodology. The following policies noted are under the current expected credit losses methodology. A summary of the Company's previous policies under the incurred credit losses methodology follows at the end of this section. Under the current expected credit loss model, the ACL on loans is a valuation allowance estimated at the balance sheet date in accordance with U.S. GAAP that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans.

The Company estimates the ACL on loans based on the underlying assets’ amortized cost basis, which is the amount at which the financing receivable is originated or acquired, adjusted for applicable accretion or amortization of premium, discount, collection of cash, and charge-offs. In the event that collection of principal becomes uncertain, the Company has policies in place to reverse accrued interest in a timely manner. Therefore, the Company has made a policy election to exclude accrued interest from the amortized cost basis.

Expected credit losses are reflected in the ACL through a charge to the provision for credit loss expense. When the Company deems all or a portion of a financial asset to be uncollectible, the appropriate amount is written off and the ACL is reduced by the same amount. In general, the principal balance of a loan is charged off in full or in part when management concludes, based on the available facts and circumstances, that collection of principal in full is not probable. In addition, the Company has reserves for expected recoveries where the Company reviews the prior four quarter charge offs and applies a recovery rate based on the Company’s historical experience. Subsequent recoveries, if any, are credited to the ACL when received.

The Company measures expected credit losses of financial assets at the loan level by segment, by pooling loans when the financial assets share similar risk characteristics. Depending on the nature of the pool of financial assets with similar risk characteristics, the Company uses a discounted cash flow (“DCF”) method to estimate the expected credit losses. Allowance on loans that do not share risk characteristics are evaluated on an individual basis. The Company assigns a credit risk rating to all commercial and commercial real estate loans. The Company reviews commercial and commercial real estate loans rated Substandard or worse, on nonaccrual, and greater than $250,000 for loss potential and when deemed appropriate, and assigns an allowance based on an individual evaluation.

The Company’s methodologies for estimating the ACL consider available relevant information about the collectability of cash flows, including information about past events, current conditions, and reasonable and supportable forecasts. The methodologies apply historical loss information, adjusted for asset-specific characteristics, economic conditions at the measurement date, and forecasts about future economic conditions expected to exist through the contractual lives of the financial assets that are reasonable and supportable, to the identified pools of financial assets with similar risk characteristics for which the historical loss experience was observed. The Company’s methodologies revert back to average historical loss information on a straight line basis over eight quarters when it can no longer develop reasonable and supportable forecasts.

The Company has identified the following pools of financial assets with similar risk characteristics for measuring expected credit losses: commercial, commercial real estate, residential, home equity, consumer and leases. This segmentation was selected based on the differences in the risk profile of each of these categories and aligns well with regulatory reporting categories. This segmentation separates borrower type, collateral type and the nature of the loan. The differences in risk profiles of these segments enable the ACL to be more precise in its allocation due to the inherent risk in these specific portfolios.

Discounted Cash Flow Method

The Company uses the DCF method to estimate expected credit losses for the commercial, commercial real estate, residential, home equity, and consumer loan pools. For each of these loan segments, the Company generates cash flow projections at the instrument level wherein payment expectations are adjusted for exposure at default using estimated prepayment speeds, time to recovery, probability of default, and loss given default. The modeling of expected prepayment speeds, and time to recovery are based on historical internal data.

The Company uses regression analysis of historical internal and peer data to determine suitable loss drivers to utilize when modeling lifetime probability of default and loss given default. This analysis also determines how expected probability of default and loss given default will react to forecasted levels of the loss drivers. For all loan pools utilizing the DCF method, management utilizes and forecasts national unemployment and a one year percentage change in national gross domestic product as loss drivers in the model.

For all DCF models, management has determined that four quarters represents a reasonable and supportable forecast period and reverts back to a historical loss rate over eight quarters on a straight-line basis. Management leverages economic projections from an independent third party to inform its loss driver forecasts over the four-quarter forecast period. Other internal and external indicators of economic forecasts, and scenario weightings, are also considered by management when developing the forecast metrics. The model considers a base case forecast and two alternative forecasts and assigns weightings to these three scenarios based on current conditions and expectations for future conditions.

The combination of adjustments for credit expectations (default and loss) and timing expectations (prepayment, curtailment, and time to recovery) produces an expected cash flow stream at the instrument level. Instrument effective yield is calculated, net of the impacts of prepayment assumptions, and the instrument expected cash flows are then discounted at that effective yield to produce an instrument-level net present value of expected cash flows (“NPV”). An ACL is established for the difference between the instrument’s NPV and amortized cost basis.

The model also considers the need to qualitatively adjust expected loss estimates for information not already captured in the loss estimation process. These qualitative factors include, but are not limited to, those suggested by the Interagency Policy Statement on Allowances for Credit Losses. These qualitative factor adjustments may increase or decrease the Company's estimate of expected credit losses. At December 31, 2020, the ACL model included increases in qualitative reserves for loans within the hospitality and other certain industries that may have an elevated level of risk due to the adverse economic impact of the COVID-19 pandemic, as well as loans that remain in the Company's payment deferral program implemented in response to the COVID-19 pandemic. The qualitative reserves were added to all portfolio segments with the majority in commercial real estate and then residential real estate.

Due to the size and characteristics of the leasing portfolio, the remaining life method, using the historical loss rate of the commercial and industrial segment, is used to determine the allowance for credit losses.

Individually Evaluated Financial Assets

Loans that do not share common risk characteristics are evaluated on an individual basis. For collateral dependent financial assets where the Company has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and the Company expects repayment of the financial asset to be provided substantially through the operation or sale of the collateral, the ACL is measured based on the difference between the fair value of the collateral less cost to sell, and the amortized cost basis of the asset as of the measurement date. The ACL may be zero if the fair value of the collateral at the measurement date exceeds the amortized cost basis of the financial asset.

The Company’s estimate of the ACL reflects losses expected over the remaining contractual life of the assets. The contractual term does not consider extensions, renewals or modifications unless the Company has identified an expected troubled debt restructuring.

Under the incurred credit losses methodology utilized in the prior periods, the allowance for loans and leases was maintained at an amount to assure that an appropriate allowance was maintained. The methodology was comprised of four major components that management had deemed appropriate in evaluating the appropriateness of the allowance for loan and lease losses. The components included: impaired loans; criticized and classified credits; historical loss experience; and qualitative or subjective analysis. For impaired loans, an allowance was recognized if the fair value of the loan was less than the recorded investment in the loan (recorded investment in the loan is the principal balance plus any accrued interest, net of deferred loan fees or costs and unamortized premium or discount). For loans that were not impaired or reviewed individually, management assigned a reserve based upon historical loss experience over a designated look-back period. Management had evaluated a variety of look-back periods and had determined that an eight year look back period was appropriate to capture a full range of economic cycles. Management had also evaluated a variety of statistical methods in analyzing loss history, including averages, weighted averages and loss emergence periods and had determined that by applying a loss emergence period analysis to historical losses over a full economic cycle had resulted in a reasonable estimate of losses inherent in the loan portfolio. The model also included an analysis of a variety of subjective factors to support the reserve estimate. These subjective factors included allowance allocations for risks that may not otherwise be fully recognized in other components of the model. Among the subjective factors that were routinely considered as part of this analysis were: growth trends in the portfolio, changes in management and/or polices related to lending activities, trends in classified or nonaccrual loans, concentrations of credit, local and national economic trends, and industry trends.

For acquired credit impaired loans accounted for under FASB ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, (“ASC Topic 310-30”), the Company’s allowance for loan and lease losses was estimated based upon our expected cash flows for these loans. To the extent that we experienced a deterioration in borrower credit quality

resulting in a decrease in our expected cash flows subsequent to the acquisition of the loans, an allowance for loan losses would be established based on our estimate of future credit losses over the remaining life of the loans.

For acquired non-credit impaired loans accounted for under FASB ASC Topic 310-20, Nonrefundable Fees and Other Costs, (“ASC Topic 310-20”), the Company’s allowance for loan and lease losses was maintained through provisions for loan losses based upon an evaluation process that was similar to our evaluation process used for originated loans. This evaluation, which included a review of loans on which full collectability may not be reasonably assured, it considered, among other matters, the estimated fair value of the underlying collateral, economic conditions, historical net loan loss experience, carrying value of the loans, which included the remaining net purchase discount or premium, and other factors that warrant recognition in determining our allowance for loan losses.

Troubled Debt Restructuring

A loan that has been modified or renewed is considered a troubled debt restructuring (“TDR”) when two conditions are met: 1) the borrower is experiencing financial difficulty and 2) concessions are made for the borrower's benefit that would not otherwise be considered for a borrower or transaction with similar credit risk characteristics. The Company’s ACL reflects all effects of a TDR when an individual asset is specifically identified as a reasonably expected TDR. The Company has determined that a TDR is reasonably expected no later than the point when the lender concludes that modification is the best course of action and it is at least reasonably possible that the troubled borrower will accept some form of concession from the lender to avoid a default. Reasonably expected TDRs and executed non-performing TDRs are evaluated individually to determine the required ACL. TDRs performing in accordance with their modified contractual terms for a reasonable period of time may be included in the Company’s existing pools based on the underlying risk characteristics of the loan to measure the ACL. The provisions of the CARES Act and interagency guidance issued by Federal banking regulators provided guidance and clarification related to modifications and deferral programs to assist borrowers who are negatively impacted by the COVID-19 national emergency. Under the CARES Act, a modification deemed to be COVID-19-related is not considered to be a TDR if the loan was not more than 30 days past due as of December 31, 2019 and the deferral was executed between March 1, 2020 and the earlier of 60 days after the date of termination of the COVID-19 national emergency or December 31, 2020. The Consolidated Appropriations Act, 2021 extended the termination of these provisions to the earlier of 60 days after the COVID-19 national emergency date or January 1, 2022. The banking regulators issued similar guidance, which clarified that a COVID-19-related modification should not be considered a TDR if the borrower was current on payments at the time the underlying loan modification program was implemented and if the modification was considered to be short-term. In accordance with the CARES Act and the interagency guidance, the Company does not designate eligible loan modifications and deferrals resulting from the impacts of COVID-19 as TDRs. The Company evaluates modifications for eligibility under the CARES Act, then the interagency guidance if they do not qualify for the CARES Act relief. Modifications that are not eligible for either program continue to follow the Corporation’s established TDR policy. Additionally, loans with deferrals granted due to COVID-19 are not generally reported as past due or nonaccrual.

Loan Commitments and Allowance for Credit Losses on Off-Balance Sheet Credit Exposures

Financial instruments include off-balance sheet credit instruments, such as commitments to make loans, unused lines of credit and commercial letters of credit, issued to meet customer financing needs. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for off-balance sheet loan commitments is represented by the contractual amount of those instruments. Such financial instruments are recorded when they are funded.

The Company records an allowance for credit losses on off-balance sheet credit exposures, unless the commitments to extend credit are unconditionally cancellable, through a charge to the provision for credit loss expense for off-balance sheet credit exposures included in other noninterest expense in the Company’s Consolidated Statements of Income. The ACL on off-balance sheet credit exposures is estimated by loan segment at each balance sheet date under the current expected credit loss model using similar methodologies as portfolio loans, taking into consideration the likelihood that funding will occur, and is included in other liabilities on the Company’s Statements of Condition.

Premises and Equipment

Land is carried at cost. Premises and equipment are stated at cost, less allowances for depreciation. The provision for depreciation for financial reporting purposes is computed generally by the straight-line method at rates sufficient to write-off the cost of such assets over their estimated useful lives. Buildings are amortized over a period of 10-39 years, and furniture, fixtures, and equipment are amortized over a period of 2-20 years. Leasehold improvements are generally depreciated over the lesser of the lease term or the estimated lives of the improvements. Maintenance and repairs are charged to expense as incurred. Gains or losses on disposition are reflected in earnings.

Other Real Estate Owned

Other real estate owned consists of properties formerly pledged as collateral to loans, which have been acquired by the Company through foreclosure proceedings or acceptance of a deed in lieu of foreclosure. Upon transfer of a loan to foreclosure status, an appraisal is generally obtained and any excess of the loan balance over the fair value, less estimated costs to sell, is charged against the allowance for credit losses. Expenses and subsequent adjustments to the fair value are treated as other operating expense.

Goodwill

GoodwillGoodwill represents the excess of purchase price over the fair value of assets acquired in a transaction using purchase accounting. Goodwill has an indefinite useful life and is not amortized, but is tested for impairment. Goodwill impairment tests are performed on an annual basis or when events or circumstances dictate. On January 1, 2020, the Company adopted ASU 2017-04, "Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment", which eliminates the entities requirement to compute the implied fair value. The Company tests goodwill annually as of December 31st. The Company has the option to perform a qualitative assessment of goodwill, which considers company-specific and economic characteristics that might impact its carrying value. If based on this qualitative assessment, it is more likely than not that the fair value of the reporting unit is less than its carrying amount, then a quantitative test (Step 1) is performed, which compares the fair value of the reporting unit to the carrying amount of the reporting unit in order to identify potential impairment. If the estimated fair value of a reporting unit exceeds its carrying amount, the goodwill of the reporting unit is not considered impaired. The implied fair value of goodwill is determined in the same manner as goodwill that is recognized in a business combination. Significant judgment and estimates are involved in estimating the fair value of the assets and liabilities of the reporting units.

Other Intangible Assets

Other intangible assets include core deposit intangibles, customer related intangibles, covenants not to compete, and mortgage servicing rights. Core deposit intangibles represent a premium paid to acquire a base of stable, low cost deposits in the acquisition of a bank, or a bank branch, using purchase accounting. The amortization period for core deposit intangible ranges from 5 to 10 years, using an accelerated method. The covenants not to compete are amortized on a straight-line basis over 3 to 6 years, while customer related intangibles are amortized on an accelerated basis over a range of 6 to 15 years. The amortization period is monitored to determine if circumstances require such periods to be revised. The Company periodically reviews its intangible assets for changes in circumstances that may indicate the carrying amount of the asset is impaired. The Company tests its intangible assets for impairment on an annual basis or more frequently if conditions indicate that an impairment loss has more likely than not been incurred.

Income Taxes

Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred taxes are reviewed quarterly and reduced by a valuation allowance if, based upon the information available, it is more likely than not that some or all of the deferred tax assets will not 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. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized. The Company’s policy is to recognize interest and penalties on unrecognized tax benefits in income tax expense in the Consolidated Statements of Income.

Tax Credit Investments

Tax Credit InvestmentsThe Company accounts for its investments in qualified affordable housing projects using the proportional amortization method. Under that method, the Company amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense.

Securities Sold Under Agreements to Repurchase

Securities sold under agreements to repurchase (repurchase agreements) are agreements in which the Company transfers the underlying securities to a third-party custodian’s account that explicitly recognizes the Company’s interest in the securities. The agreements are accounted for as secured financing transactions provided the Company maintains effective control over the transferred securities and meets other criteria as specified in FASB ASC Topic 860, Transfers and Servicing (“ASC Topic 860”). The Company’s agreements are accounted for as secured financings; accordingly, the transaction proceeds are reflected as liabilities and the securities underlying the agreements continue to be carried in the Company’s securities portfolio.

Treasury Stock

The cost of treasury stock is shown on the Consolidated Statements of Condition as a separate component of shareholders’ equity, and is a reduction to total shareholders’ equity. Shares are released from treasury at fair value, identified on an average cost basis.

Trust and Investment Services

Assets held in fiduciary or agency capacities for customers are not included in the accompanying Consolidated Statements of Condition, since such items are not assets of the Company. Fees associated with providing trust and investment services are included in noninterest income. Additional information on trust and investment fees is presented in Note 14 - "Revenue Recognition."

Earnings Per Share

Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of shares outstanding during the year, exclusive of shares represented by the unvested portion of restricted stock and restricted stock units. Diluted earnings per share is calculated by dividing net income available to common shareholders by the weighted average number of shares outstanding during the year plus the dilutive effect of the unvested portion of restricted stock and restricted stock units and stock issuable upon conversion of common stock equivalents (primarily stock options) or certain other contingencies. The Company uses authoritative accounting guidance under ASC Topic 260, Earnings Per Share, which provides that unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of earnings per share pursuant to the two-class method. The Company issues stock-based compensation awards that included restricted stock awards that contain such rights.

Segment Reporting

Segment ReportingThe Company manages its operations through three reportable business segments in accordance with the standards set forth in FASB ASC Topic 280, “Segment Reporting”. The three segments are: (i) banking (“Banking”), (ii) insurance (“Tompkins Insurance Agencies, Inc.”) and (iii) wealth management (“Tompkins Financial Advisors”). The Company’s insurance services and wealth management services are managed separately from the Bank.

Comprehensive Income (Loss)

For the Company, comprehensive income (loss) represents net income plus the net change in unrealized gains or losses on available-for-sale debt securities for the period (net of taxes), and the actuarial gain or loss and amortization of unrealized amounts in the Company’s defined-benefit retirement and pension plan, supplemental employee retirement plan, and post-retirement life and healthcare benefit plan (net of taxes), and is presented in the Consolidated Statements of Comprehensive Income (Loss) and Consolidated Statements of Changes in Shareholders’ Equity. Accumulated other comprehensive income (loss) represents the net unrealized gains or losses on available-for-sale debt securities (net of tax) and unrecognized net actuarial gain or loss, unrecognized prior service costs, and unrecognized net initial obligation (net of tax) in the Company’s defined-benefit retirement and pension plan, supplemental employee retirement plan, and post-retirement life and healthcare benefit plan.

Pension and Other Employee Benefits

The Company maintains noncontributory defined-benefit and defined contribution plans, which cover substantially all employees of the Company. In addition, the Company also maintains supplemental employee retirement plans for certain executives and a post-retirement life and healthcare plan. These plans are discussed in detail in Note 11 “Employee Benefit Plans”. The Company incurs certain employment-related expenses associated with these plans. In order to measure the expense associated with these plans, various assumptions are made including the discount rate used to value certain liabilities, expected return on plan assets, anticipated mortality rates, and expected future healthcare costs. The assumptions are based on historical experience as well as current facts and circumstances. A third-party actuarial firm is used to assist management in measuring the expense and liability associated with the plans. The Company uses a December 31 measurement date for its plans. As of the

measurement date, plan assets are determined based on fair value, generally representing observable market prices. The projected benefit obligation is primarily determined based on the present value of projected benefit distributions at an assumed discount rate.

The expenses associated with these plans are charged to current operating expenses. The Company recognizes an asset for a plan’s overfunded status or a liability for a plan’s underfunded status in the Company’s consolidated statements of condition, and recognizes changes in the funded status of these plans in comprehensive income, net of applicable taxes, in the year in which the change occurred.

Fair Value Measurements

The Company accounts for the provisions of FASB ASC Topic 820, Fair Value Measurements and Disclosures (“ASC Topic 820”), for financial assets and financial liabilities. ASC Topic 820 defines fair value, establishes a framework for measuring fair value in accordance with U.S. GAAP, and expands disclosures about fair value measurements. See Note 19 “Fair Value Measurements”.

In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among others.

Revenue Recognition

Revenue RecognitionTompkins adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606) as of January 1, 2018 using the modified retrospective method for all contracts. Results for reporting periods beginning January 1, 2018 are presented under ASC 606, while prior period amounts were not adjusted and continue to be reported in accordance with the Company’s historic accounting under Topic 605, Revenue Recognition. The Company recorded a net increase to beginning retained earnings of $1.8 million as of January 1, 2018 due to the cumulative impact of adopting ASC 606. The impact on beginning retained earnings was primarily driven by the recognition of $1.8 million of contingency income related to our insurance business segment. Under ASU 2014-09, effective January 1, 2018, the Company adopted new policies related to revenue recognition. In general, for revenue not associated with financial instruments, guarantees and lease contracts, the Company applies the following steps when recognizing revenue from contracts with customers: (i) identify the contract, (ii) identify the performance obligations, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when a performance obligation is satisfied. Tompkins' contracts with customers are generally short term in nature, typically due within one year or less or cancellable by the Company or the Company's customer upon a short notice period. Performance obligations for the Company's customer contracts are generally satisfied at a single point in time, typically when the transaction is complete, or over time. For performance obligations satisfied over time, Tompkins primarily uses the output method, directly measuring the value of the products/services transferred to the customer, to determine when performance obligations have been satisfied. The Company typically receives payment from customers and recognizes revenue concurrent with the satisfaction of the Company's performance obligations. In most cases, this occurs within a single financial reporting period. For payments received in advance of the satisfaction of performance obligations, revenue recognition is deferred until such time as the performance obligations have been satisfied. In cases where the Company has not received payment despite satisfaction of the Company's performance obligations, the Company accrues an estimate of the amount due in the period the Company's performance obligations have been satisfied. For contracts with variable components, only amounts for which collection is probable are accrued. The Company generally acts in a principal capacity, on the Company's own behalf, in most of the Company's contracts with customers. In such transactions, Tompkins recognizes revenue and the related costs to provide the services on a gross basis in the Company's financial statements. In some cases, Tompkins acts in an agent capacity, deriving revenue through assisting other entities in transactions with the Company's customers. In such transactions, Tompkins recognizes revenue and the related costs to provide the services on a net basis in the Company's financial statements. These transactions recognized on a net basis primarily relate to insurance and brokerage commissions and fees derived from the Company's customers' use of various interchange and ATM/debit card networks.