Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]
Nature of Operations and Consolidation [Policy Text Block]	Nature of Operations and Consolidation The consolidated financial statements include the accounts of American National Bankshares Inc. (the "Company") and its wholly owned subsidiary, American National Bank and Trust Company (the "Bank"). The Bank offers a wide variety of retail, commercial, secondary market mortgage lending, and trust and investment services which also include non-deposit products such as mutual funds and insurance policies. The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for credit losses, goodwill and intangible assets. The accompanying consolidated financial statements include financial information related to the Company and its majority-owned subsidiaries and those variable interest entities where the Company is the primary beneficiary, if any. In preparing the consolidated financial statements, all significant inter-company accounts and transactions have been eliminated. Assets held in an agency or fiduciary capacity are not included in the consolidated financial statements. Accounting guidance states that if a business enterprise is the primary beneficiary of a variable interest entity, the assets, liabilities, and results of the activities of the variable interest entity should be included in the consolidated financial statements of the business enterprise. An entity is deemed to be the primary beneficiary of a variable interest entity if that entity has both the power to direct the activities that most significantly impact its economic performance; and the obligation to absorb losses or the right to receive benefits that could potentially be significant to the variable interest entity. Refer to Note 11 for further details concerning variable interest entities.
Merger Agreement [Policy Text Block]	Agreement and Plan of Merger On July 24, 2023, the Company entered into an Agreement and Plan of Merger with Atlantic Union Bankshares Corporation ("Atlantic Union"). The merger agreement provides that the Company will merge with and into Atlantic Union, with Atlantic Union continuing as the surviving entity. Immediately following the merger of the Company and Atlantic Union, the Bank will merge with and into Atlantic Union's wholly owned bank subsidiary, Atlantic Union Bank, with Atlantic Union Bank continuing as the surviving bank. Subject to the terms and conditions of the merger agreement, at the effective time of the merger, each outstanding share of common stock of the Company will be converted into the right to receive 1.35 shares of common stock of Atlantic Union, with cash to be paid in lieu of any fractional shares. The merger is expected to close on April 1, 2024, subject to satisfaction of customary closing conditions.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents Cash includes cash on hand, cash with correspondent banks, and cash on deposit at the Federal Reserve Bank of Richmond. Cash equivalents are short-term, highly liquid investments that are readily convertible to cash with original maturities of three months or less and are subject to an insignificant risk of change in value. Cash and cash equivalents are carried at cost.
Interest-bearing Deposits in Other Banks [Policy Text Block]	Interest-bearing Deposits in Other Banks Interest-bearing deposits in other banks mature within one year and are carried at cost.
Marketable Securities, Policy [Policy Text Block]	Securities For available-for-sale ("AFS") securities, the Company evaluates the fair value and credit quality of its AFS securities on at least a quarterly basis. In the event the fair value of a security falls below its amortized cost basis, the security will be evaluated to determine whether the decline in value was caused by changes in market interest rates or security credit quality. The primary indicators of credit quality for the Company's AFS portfolio are security type and credit rating, which is influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, and others. There is currently no allowance for credit losses ("ACL") recorded against any securities in the Company's AFS securities portfolio at December 31, 2023. See Note 3 - "Securities" for additional information on the Company's ACL analysis. If unrealized losses are related to credit quality, the Company estimates the credit related loss by evaluating the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis of the security and a credit loss exists, an ACL shall be recorded for the credit loss, limited by the amount that the fair value is less than amortized cost basis. The Company does not currently have any securities in held to maturity or trading and has no plans to add any to either category. Equity securities with readily determinable fair values are carried at fair value with changes in fair value included in noninterest income. Due to the nature and restrictions placed on the Company's investment in common stock of the Federal Home Loan Bank of Atlanta ("FHLB") and the Federal Reserve Bank of Richmond, these securities have been classified as restricted equity securities and carried at cost.
Financing Receivable, Held-for-Sale [Policy Text Block]	Loans Held for Sale Secondary market mortgage loans are designated as held for sale at the time of their origination. These loans are pre-sold with servicing released and the Company does not retain any interest after the loans are sold. These loans consist primarily of fixed-rate, single-family residential mortgage loans which meet the underwriting characteristics of certain government-sponsored enterprises (conforming loans). In addition, the Company requires a firm purchase commitment from a permanent investor before a loan can be committed, thus limiting interest rate risk. Loans held for sale are carried at fair value. Gains on sales of loans are recognized at the loan closing date and are included in noninterest income.
Loan Commitments, Policy [Policy Text Block]	Derivative Loan Commitments The Company enters into mortgage loan commitments whereby the interest rate on the loan is determined prior to funding (rate lock commitments). Mortgage loan commitments are referred to as derivative loan commitments if the loan that will result from exercise of the commitment will be held for sale upon funding. Loan commitments that are derivatives are recognized at fair value on the consolidated balance sheets with net changes in their fair values recorded in other expenses. The period of time between issuance of a loan commitment and sale of the loan generally ranges from 30 to 60 days. The Company protects itself from changes in interest rates through the use of best efforts forward delivery contracts, by committing to sell a loan at the time the borrower commits to an interest rate with the intent that the buyer has assumed the interest rate risk on the loan. As a result, the Company is not generally exposed to significant losses nor will it realize significant gains related to its rate lock commitments due to changes in interest rates. The correlation between the rate lock commitments and the best efforts contracts is very high due to their similarity. The fair value of rate lock commitments and best efforts contracts is not readily ascertainable with precision because rate lock commitments and best efforts contracts are not actively traded in stand-alone markets. The Company determines the fair value of rate lock commitments and best efforts contracts by measuring the change in the estimated value of the underlying assets while taking into consideration the probability that the loans will be funded.
Receivable [Policy Text Block]	Loans Held for Investment The Company makes mortgage, commercial, and consumer loans. A substantial portion of the loan portfolio is secured by real estate. The ability of the Company's debtors to honor their contracts is dependent upon the real estate market and general economic conditions in the Company's market area. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balance adjusted for the allowance for credit losses and any deferred fees or costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. The accrual of interest on loans is generally discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Loans are typically charged off when the loan is 120 days past due, unless secured and in process of collection. Loans are placed on nonaccrual status or charged-off at an earlier date if collection of principal or interest is considered doubtful. Interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. The interest on these loans is accounted for on the cash basis or cost recovery method until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. A loan is considered past due when a payment of principal or interest or both is due but not paid. Management closely monitors past due loans in timeframes of 30-59 days, 60-89 days, and 90 or more days past due. These policies apply to all loan portfolio classes and segments. The Company's loan portfolio is organized by major segment. These include: commercial, commercial real estate, residential real estate and consumer loans. Each segment has particular risk characteristics that are specific to the borrower and the generic category of credit. Commercial loan repayments are highly dependent on cash flows associated with the underlying business and its profitability. They can also be impacted by changes in collateral values. Commercial real estate loans share the same general risk characteristics as commercial loans but are often more dependent on the value of the underlying real estate collateral and, when construction is involved, the ultimate completion of and sale of the project. Residential real estate loans are generally dependent on the value of collateral and the credit worthiness of the underlying borrower. Consumer loans are very similar in risk characteristics to residential real estate.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Credit Losses ("ACL") - Loans The provision for credit losses charged to operations is an amount sufficient to bring the allowance to an estimated balance that management considers adequate to absorb expected losses in the Company's loan portfolio. The ACL is a valuation allowance that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Amortized cost is the principal balance outstanding, net of any purchase premiums and discounts and net of any deferred loan fees and costs. The ACL represents management's estimate of credit losses over the remaining life of the loan portfolio. Loans are charged off against the ACL when management believes the loan balance is no longer collectible. Subsequent recoveries of previously charged off amounts are recorded as increases to the ACL. The Company's ACL consists of quantitative and qualitative allowances and an allowance for loans that are individually assessed for credit losses. Each of these components is determined based upon estimates and judgments. The quantitative allowance uses historical default and loss experience as well as estimates for prepayments to calculate lifetime expected losses, along with various qualitative factors, including the effects of changes in risk selection, underwriting standards, and lending policies; expected economic conditions throughout a reasonable and supportable period of 24 months; experience of lending staff; quality of the loan review system; and changes in the regulatory, legal, and competitive environment and consideration of peer loss experience. The Company considers economic forecasts from highly recognized third-parties for the model inputs. Loans are segmented based on the type of loan and internal risk ratings. The Company utilizes two calculation methodologies to estimate the collective quantitative allowance: the vintage method and the non-discounted cash flow method. Allowance estimates for residential real estate loans are determined by a vintage method which pools loans by date of origination and applies historical average loss rates based on the age of the loans. Allowance estimates for all other loan types are determined by a non-discounted cash flow method which applies historical probabilities of default and loss given default rates to model expected cash flows for each loan through its life and forecast future expected losses. Loans that do not share risk characteristics are evaluated on an individual basis. The individual reserve component relates to loans that have shown substantial credit deterioration as measured by risk rating and/or delinquency status. In addition, the Company has elected the practical expedient that would include loans for individual assessment consideration if the repayment of the loan is expected substantially through the operation or sale of collateral because the borrower is experiencing financial difficulty. Where the source of repayment is the sale of collateral, the ACL is based on the fair value of the underlying collateral, less selling costs, compared to the amortized cost basis of the loan. If the ACL is based on the operation of the collateral, the reserve is calculated based on the fair value of the collateral calculated as the present value of expected cash flows from the operation of the collateral, compared to the amortized cost basis. If the Company determines that the value of a collateral dependent loan is less than the recorded investment in the loan, the Company charges off the deficiency if it is determined that such amount is deemed to be a confirmed loss.
Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block]	Allowance for Unfunded Commitments The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The reserve for unfunded commitments is adjusted through the provision for credit losses. The calculation of the allowance is consistent with the loss rate calculations for the loan portfolio described above. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded and the provision is recorded in ACL and the reserve is in "Other Liabilities" within the Company's Consolidated Balance Sheets.
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Premises and equipment are depreciated over their estimated useful lives ranging from three years to thirty-nine years; leasehold improvements are amortized over the lives of the respective leases or the estimated useful lives of the improvements, whichever is less. Software is generally amortized over three years. Depreciation and amortization are recorded on the straight-line method. Costs of maintenance and repairs are charged to expense as incurred. Costs of replacing structural parts of major units are considered individually and are expensed or capitalized as the facts dictate. Gains and losses on routine dispositions are reflected in current operations.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Intangible Assets Goodwill represents the excess of the cost of an acquired entity over the fair value of the identifiable net assets acquired. The Company follows Accounting Standards Codification ("ASC") 350, Intangibles - Goodwill and Other, which prescribes the accounting for goodwill and intangible assets subsequent to initial recognition. The Company performs its annual analysis as of June 30 each year. Goodwill is not amortized, but is subject to at least an annual assessment for impairment. Other acquired intangible assets with finite lives (such as core deposit intangibles) are initially recorded at estimated fair value and are amortized over their useful lives. Core deposit and other intangible assets are generally amortized using accelerated methods over their useful lives of five to ten years.
Lessee, Leases [Policy Text Block]	Leases The Company determines if an arrangement is a lease at inception. All of the Company's leases are currently classified as operating leases and are included in other assets and other liabilities on the Company's Consolidated Balance Sheets. Periodic operating lease costs are recorded in occupancy expenses of premises on the Company's Consolidated Statements of Income. Right-of-use ("ROU") assets represent the Company's right to use an underlying asset for the lease term, and lease liabilities represent the Company's obligation to make lease payments arising from the lease arrangements. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of the expected future lease payments over the remaining lease term. In determining the present value of future lease payments, the Company uses its incremental borrowing rate based on the information available at the lease commencement date. The operating ROU assets are adjusted for any lease payments made at or before the lease commencement date, initial direct costs, any lease incentives received and, for acquired leases, any favorable or unfavorable fair value adjustments. The present value of the lease liability may include the impact of options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options provided in the lease terms. Lease expense is recognized on a straight-line basis over the expected lease term. Lease agreements that include lease and non-lease components, such as common area maintenance charges, are accounted for separately.
Wealth Management Assets [Policy Text Block]	Wealth Management Assets Securities and other property held by the wealth management segment in a fiduciary or agency capacity are not assets of the Company and are not included in the accompanying consolidated financial statements.
Financing Receivable, Held-for-Investment, Foreclosed Asset [Policy Text Block]	Other Real Estate Owned ("OREO") OREO represents real estate that has been acquired through loan foreclosures or deeds received in lieu of loan payments. Generally, such properties are appraised at the time acquired and are recorded at fair value less estimated selling costs. Subsequent to foreclosure, valuations are periodically performed by management, and the assets are carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations and changes in the valuation allowance are included in noninterest expense.
Life Insurance, Bank Owned [Policy Text Block]	Bank Owned Life Insurance In connection with mergers, the Company has acquired bank owned life insurance ("BOLI"). The asset is reflected as the cash surrender value of the policies as provided by the insurer on a monthly basis.
Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]	Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company – put presumptively beyond reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company uses the balance sheet method to account for deferred income tax assets and liabilities. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws. When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not that the position will be sustained upon examination, including the resolution of appeals or litigation processes, if any. Tax positions taken are not offset or aggregated with other positions. Tax positions that meet the more-likely-than-not recognition threshold are measured as the largest amount of tax benefit that is more than 50 percent likely of being realized upon settlement with the applicable taxing authority. The portion of the benefits associated with tax positions taken that exceeds the amount measured as described above is reflected as a liability for unrecognized tax benefits in the accompanying consolidated balance sheet along with any associated interest and penalties that would be payable to the taxing authorities upon examination. The Company had no liability for unrecognized tax benefits as of December 31, 2023 and 2022.
Compensation Related Costs, Policy [Policy Text Block]	Stock-Based Compensation Stock compensation accounting guidance ASC 718, Compensation - Stock Compensation, requires that the compensation cost relating to share-based payment transactions be recognized in financial statements. That cost will be measured based on the grant date fair value of the equity or liability instruments issued. The stock compensation accounting guidance covers a wide range of share-based compensation arrangements including stock options, restricted share plans, performance-based awards, share appreciation rights, and employee share purchase plans. The stock compensation accounting guidance requires that compensation cost for all stock awards be calculated and recognized over the employees' service period, generally defined as the vesting period. For awards with graded-vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. A Black-Scholes model is used to estimate the fair value of stock options, while the market price of the Company's common stock at the date of grant is used for restricted stock awards.
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Common Share Basic earnings per common share represent income available to common shareholders divided by the average number of common shares outstanding during the period. Diluted earnings per common share reflect the impact of additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company consist solely of outstanding stock options and are determined using the treasury method. Nonvested shares of restricted stock are included in the computation of basic earnings per share because the holder has voting rights and shares in non-forfeitable dividends during the vesting period.
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income Comprehensive income is shown in a two statement approach; the first statement presents total net income and its components followed by a second statement that presents all the components of other comprehensive income which include unrealized gains and losses on available for sale securities, unrealized gains and losses on cash flow hedges, and changes in the funded status of the defined benefit postretirement plan.
Advertising Cost [Policy Text Block]	Advertising and Marketing Costs Advertising and marketing costs are expensed as incurred.
Business Combinations Policy [Policy Text Block]	Mergers and Acquisitions Business combinations are accounted for under ASC 805, Business Combinations, using the acquisition method of accounting. The acquisition method of accounting requires an acquirer to recognize the assets acquired and the liabilities assumed at the acquisition date measured at their fair values as of that date. To determine the fair values, the Company relies on third party valuations, such as appraisals, or internal valuations based on discounted cash flow analyses or other valuation techniques. Under the acquisition method of accounting, the Company identifies the acquirer and the closing date and applies applicable recognition principles and conditions. Acquisition-related costs are costs the Company incurs to effect a business combination. Those costs include advisory, legal, accounting, valuation, and other professional or consulting fees. Some other examples of costs to the Company include systems conversions, integration planning consultants and advertising costs. The Company accounts for acquisition-related costs as expenses in the periods in which the costs are incurred and the services are received, with one exception. The costs to issue debt or equity securities is recognized in accordance with other applicable GAAP. These acquisition-related costs have been and will be included within the consolidated statements of income classified within the noninterest expense caption. Merger related expenses were $2.6 million for the year ended December 31, 2023. There were no such acquisition related costs for the years ended December 31, 2022, or 2021.
Derivatives, Policy [Policy Text Block]	Derivative Financial Instruments The Company uses derivatives primarily to manage risk associated with changing interest rates. The Company's derivative financial instruments consisted of interest rate swaps that qualify as cash flow hedges of the Company's trust preferred capital notes. The Company recognized derivative financial instruments at fair value as either an other asset or other liability in the consolidated balance sheets. The effective portion of the gain or loss on the Company's cash flow hedges was reported as a component of other comprehensive income, net of deferred income taxes, and was reclassified into earnings in the same period or periods during which the hedged transactions affect earnings. The company terminated the interest rate swaps in October 2023. See Note 12 - "Derivative Financial Instruments and Hedging Activities" for additional information.
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassifications Certain reclassifications have been made in prior years' financial statements to conform to classifications used in the current year. There were no material reclassifications.
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Standards Adopted in 2023 On January 1, 2023, the Company adopted Accounting Standards Update ("ASU") 2016-13, "Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." This standard replaced the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss ("CECL") methodology. CECL requires an estimate of credit losses from the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts and generally applies to financial assets measured at amortized cost, including loan receivables and some off-balance sheet credit exposures such as unfunded commitments to extend credit. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. In addition, CECL required changes to the accounting for available for sale debt securities. One such change is to require impairments deemed to be permanent in nature as credit losses to be presented as an allowance rather than as a write-down on available for sale debt securities. The adjustments recorded at adoption were increases to the allowance for credit losses on loans of $5.2 million, $305 thousand to the reserve for unfunded loan commitments and $1.2 million to deferred tax assets. The adjustment to retained earnings was a decrease of $4.2 million. The Company adopted ASC 326 using the prospective transition approach for purchased credit deteriorated ("PCD") assets that were previously classified as purchased credit impaired ("PCI") under ASC 310-30. Results for reporting periods beginning after January 1, 2023 are presented under CECL while prior period amounts continue to be reported in accordance with previously applicable accounting standards ("Incurred Loss Model"). The Company adopted ASC 326 using the prospective transition approach for debt securities. The Company elected not to measure an allowance for credit losses for accrued interest receivable and instead elected to reverse interest income on loans that are placed on nonaccrual status, which is generally when the loan is 90 days past due, or earlier if the Company believes the collection of interest is doubtful. In March 2022, the Financial Accounting Standards Board ("FASB") issued ASU 2022-02, "Financial Instruments-Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures." ASU 2022-02 addresses areas identified by FASB as part of its post-implementation review of the credit losses standard that introduced the CECL model. The amendments eliminate the accounting guidance for troubled debt restructurings ("TDRs") by creditors that have adopted the CECL model and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require a public business entity to disclose current-period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. The Company adopted the provision in ASU 2022-02 related to the recognition and measurement of TDRs on a prospective basis on January 1, 2023. The TDR classification is no longer applicable subsequent to December 31, 2022. The adoption of ASU 2022-02 did not have a material effect on the Company's consolidated financial statements. See Note 4 - "Loans" for discussion. Information contained within the report prior to adoption of ASU 2022-02 and ASU 2016-13 for the year ended December 31, 2022 and 2021, respectively, reflects prior GAAP. In December 2022, the FASB issued ASU 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848." ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance in Topic 848. The objective of the guidance in Topic 848 is to provide relief during the temporary transition period, so the FASB included a sunset provision within Topic 848 based on expectations of when the London Interbank Offered Rate ("LIBOR") would cease being published. In 2021, the UK Financial Conduct Authority (FCA) delayed the intended cessation date of certain tenors of USD LIBOR to June 30, 2023. To ensure the relief in Topic 848 covers the period of time during which a significant number of modifications may take place, the ASU defers the sunset date of Topic 848 from December 31, 2022, to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. The ASU was effective for all entities upon issuance. The Company adopted ASU 2022-06 in the year ended December 31, 2023. The adoption did not have a material effect on the Company's consolidated financial statements. Recent Accounting Pronouncements In December 2023, FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." The amendments in this ASU require an entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold, which is greater than five percent of the amount computed by multiplying pretax income by the entity's applicable statutory rate, on an annual basis. Additionally, the amendments in this ASU require an entity to disclose the amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign taxes and the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions that are equal to or greater than five percent of total income taxes paid (net of refunds received). Lastly, the amendments in this ASU require an entity to disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign and income tax expense (or benefit) from continuing operations disaggregated by federal, state, and foreign. This ASU is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied on a prospective basis; however, retrospective application is permitted. The Company does not expect the adoption of ASU 2023-09 to have a material impact on its consolidated financial statements. In November 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendments in this ASU are intended to improve reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. This ASU requires disclosure of significant segment expenses that are regularly provided to the chief operating decision mark ("CODM"), an amount for other segment items by reportable segment and a description of its composition, all annual disclosures required by FASB ASU Topic 280 in interim periods as well, and the title and position of the CODM and how the CODM uses the reported measures. Additionally, this ASU requires that at least one of the reported segment profit and loss measures should be the measure that is most consistent with the measurement principles used in an entity's consolidated financial statements. Lastly, this ASU requires public business entities with a single reportable segment to provide all disclosures required by these amendments in this ASU and all existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied retrospectively. The Company does not expect the adoption of ASU 2023-07 to have a material impact on its consolidated financial statements. In October 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-06, "Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative." This ASU incorporates certain U.S. Securities and Exchange Commission ("SEC") disclosure requirements into the FASB Accounting Standards Codification. The amendments in the ASU are expected to clarify or improve disclosure and presentation requirements of a variety of Codification Topics, allow users to more easily compare entities subject to the SEC's existing disclosures with those entities that were not previously subject to the requirements, and align the requirements in the Codification with the SEC's regulations. For entities subject to the SEC's existing disclosure requirements and for entities required to file or furnish financial statements with or to the SEC in preparation for the sale of or for purposes of issuing securities that are not subject to contractual restrictions on transfer, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. For all other entities, the amendments will be effective two years later. However, if by June 30, 2027, the SEC has not removed the related disclosure from its regulations, the amendments will be removed from the Codification and not become effective for any entity. The Company does not expect the adoption of ASU 2023-06 to have a material impact on its consolidated financial statements.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2023

Nature of Operations and Consolidation [Policy Text Block]

Nature of Operations and Consolidation

The consolidated financial statements include the accounts of American National Bankshares Inc. (the "Company") and its wholly owned subsidiary, American National Bank and Trust Company (the "Bank"). The Bank offers a wide variety of retail, commercial, secondary market mortgage lending, and trust and investment services which also include non-deposit products such as mutual funds and insurance policies.

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for credit losses, goodwill and intangible assets.

The accompanying consolidated financial statements include financial information related to the Company and its majority-owned subsidiaries and those variable interest entities where the Company is the primary beneficiary, if any. In preparing the consolidated financial statements, all significant inter-company accounts and transactions have been eliminated. Assets held in an agency or fiduciary capacity are not included in the consolidated financial statements. Accounting guidance states that if a business enterprise is the primary beneficiary of a variable interest entity, the assets, liabilities, and results of the activities of the variable interest entity should be included in the consolidated financial statements of the business enterprise. An entity is deemed to be the primary beneficiary of a variable interest entity if that entity has both the power to direct the activities that most significantly impact its economic performance; and the obligation to absorb losses or the right to receive benefits that could potentially be significant to the variable interest entity. Refer to Note 11 for further details concerning variable interest entities.

Merger Agreement [Policy Text Block]

Agreement and Plan of Merger

On July 24, 2023, the Company entered into an Agreement and Plan of Merger with Atlantic Union Bankshares Corporation ("Atlantic Union"). The merger agreement provides that the Company will merge with and into Atlantic Union, with Atlantic Union continuing as the surviving entity. Immediately following the merger of the Company and Atlantic Union, the Bank will merge with and into Atlantic Union's wholly owned bank subsidiary, Atlantic Union Bank, with Atlantic Union Bank continuing as the surviving bank. Subject to the terms and conditions of the merger agreement, at the effective time of the merger, each outstanding share of common stock of the Company will be converted into the right to receive 1.35 shares of common stock of Atlantic Union, with cash to be paid in lieu of any fractional shares. The merger is expected to close on April 1, 2024, subject to satisfaction of customary closing conditions.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents

Cash includes cash on hand, cash with correspondent banks, and cash on deposit at the Federal Reserve Bank of Richmond. Cash equivalents are short-term, highly liquid investments that are readily convertible to cash with original maturities of three months or less and are subject to an insignificant risk of change in value. Cash and cash equivalents are carried at cost.

Interest-bearing Deposits in Other Banks [Policy Text Block]

Interest-bearing Deposits in Other Banks

Interest-bearing deposits in other banks mature within one year and are carried at cost.

Marketable Securities, Policy [Policy Text Block]

Securities

For available-for-sale ("AFS") securities, the Company evaluates the fair value and credit quality of its AFS securities on at least a quarterly basis. In the event the fair value of a security falls below its amortized cost basis, the security will be evaluated to determine whether the decline in value was caused by changes in market interest rates or security credit quality. The primary indicators of credit quality for the Company's AFS portfolio are security type and credit rating, which is influenced by a number of security-specific factors that may include obligor cash flow, geography, seniority, and others. There is currently no allowance for credit losses ("ACL") recorded against any securities in the Company's AFS securities portfolio at December 31, 2023. See Note 3 - "Securities" for additional information on the Company's ACL analysis. If unrealized losses are related to credit quality, the Company estimates the credit related loss by evaluating the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis of the security and a credit loss exists, an ACL shall be recorded for the credit loss, limited by the amount that the fair value is less than amortized cost basis.

The Company does not currently have any securities in held to maturity or trading and has no plans to add any to either category.

Equity securities with readily determinable fair values are carried at fair value with changes in fair value included in noninterest income.

Due to the nature and restrictions placed on the Company's investment in common stock of the Federal Home Loan Bank of Atlanta ("FHLB") and the Federal Reserve Bank of Richmond, these securities have been classified as restricted equity securities and carried at cost.

Financing Receivable, Held-for-Sale [Policy Text Block]

Loans Held for Sale

Secondary market mortgage loans are designated as held for sale at the time of their origination. These loans are pre-sold with servicing released and the Company does not retain any interest after the loans are sold. These loans consist primarily of fixed-rate, single-family residential mortgage loans which meet the underwriting characteristics of certain government-sponsored enterprises (conforming loans). In addition, the Company requires a firm purchase commitment from a permanent investor before a loan can be committed, thus limiting interest rate risk. Loans held for sale are carried at fair value. Gains on sales of loans are recognized at the loan closing date and are included in noninterest income.

Loan Commitments, Policy [Policy Text Block]

Derivative Loan Commitments

The Company enters into mortgage loan commitments whereby the interest rate on the loan is determined prior to funding (rate lock commitments). Mortgage loan commitments are referred to as derivative loan commitments if the loan that will result from exercise of the commitment will be held for sale upon funding. Loan commitments that are derivatives are recognized at fair value on the consolidated balance sheets with net changes in their fair values recorded in other expenses.

The period of time between issuance of a loan commitment and sale of the loan generally ranges from 30 to 60 days. The Company protects itself from changes in interest rates through the use of best efforts forward delivery contracts, by committing to sell a loan at the time the borrower commits to an interest rate with the intent that the buyer has assumed the interest rate risk on the loan. As a result, the Company is not generally exposed to significant losses nor will it realize significant gains related to its rate lock commitments due to changes in interest rates. The correlation between the rate lock commitments and the best efforts contracts is very high due to their similarity.

The fair value of rate lock commitments and best efforts contracts is not readily ascertainable with precision because rate lock commitments and best efforts contracts are not actively traded in stand-alone markets. The Company determines the fair value of rate lock commitments and best efforts contracts by measuring the change in the estimated value of the underlying assets while taking into consideration the probability that the loans will be funded.

Receivable [Policy Text Block]

Loans Held for Investment

The Company makes mortgage, commercial, and consumer loans. A substantial portion of the loan portfolio is secured by real estate. The ability of the Company's debtors to honor their contracts is dependent upon the real estate market and general economic conditions in the Company's market area.

Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balance adjusted for the allowance for credit losses and any deferred fees or costs. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. The accrual of interest on loans is generally discontinued at the time the loan is 90 days delinquent unless the credit is well-secured and in process of collection. Loans are typically charged off when the loan is 120 days past due, unless secured and in process of collection. Loans are placed on nonaccrual status or charged-off at an earlier date if collection of principal or interest is considered doubtful.

Interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. The interest on these loans is accounted for on the cash basis or cost recovery method until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.

A loan is considered past due when a payment of principal or interest or both is due but not paid. Management closely monitors past due loans in timeframes of 30-59 days, 60-89 days, and 90 or more days past due.

These policies apply to all loan portfolio classes and segments.

The Company's loan portfolio is organized by major segment. These include: commercial, commercial real estate, residential real estate and consumer loans. Each segment has particular risk characteristics that are specific to the borrower and the generic category of credit. Commercial loan repayments are highly dependent on cash flows associated with the underlying business and its profitability. They can also be impacted by changes in collateral values. Commercial real estate loans share the same general risk characteristics as commercial loans but are often more dependent on the value of the underlying real estate collateral and, when construction is involved, the ultimate completion of and sale of the project. Residential real estate loans are generally dependent on the value of collateral and the credit worthiness of the underlying borrower. Consumer loans are very similar in risk characteristics to residential real estate.

Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]

Allowance for Credit Losses ("ACL") - Loans

The provision for credit losses charged to operations is an amount sufficient to bring the allowance to an estimated balance that management considers adequate to absorb expected losses in the Company's loan portfolio. The ACL is a valuation allowance that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Amortized cost is the principal balance outstanding, net of any purchase premiums and discounts and net of any deferred loan fees and costs. The ACL represents management's estimate of credit losses over the remaining life of the loan portfolio. Loans are charged off against the ACL when management believes the loan balance is no longer collectible. Subsequent recoveries of previously charged off amounts are recorded as increases to the ACL.

The Company's ACL consists of quantitative and qualitative allowances and an allowance for loans that are individually assessed for credit losses. Each of these components is determined based upon estimates and judgments. The quantitative allowance uses historical default and loss experience as well as estimates for prepayments to calculate lifetime expected losses, along with various qualitative factors, including the effects of changes in risk selection, underwriting standards, and lending policies; expected economic conditions throughout a reasonable and supportable period of 24 months; experience of lending staff; quality of the loan review system; and changes in the regulatory, legal, and competitive environment and consideration of peer loss experience. The Company considers economic forecasts from highly recognized third-parties for the model inputs. Loans are segmented based on the type of loan and internal risk ratings. The Company utilizes two calculation methodologies to estimate the collective quantitative allowance: the vintage method and the non-discounted cash flow method. Allowance estimates for residential real estate loans are determined by a vintage method which pools loans by date of origination and applies historical average loss rates based on the age of the loans. Allowance estimates for all other loan types are determined by a non-discounted cash flow method which applies historical probabilities of default and loss given default rates to model expected cash flows for each loan through its life and forecast future expected losses.

Loans that do not share risk characteristics are evaluated on an individual basis. The individual reserve component relates to loans that have shown substantial credit deterioration as measured by risk rating and/or delinquency status. In addition, the Company has elected the practical expedient that would include loans for individual assessment consideration if the repayment of the loan is expected substantially through the operation or sale of collateral because the borrower is experiencing financial difficulty. Where the source of repayment is the sale of collateral, the ACL is based on the fair value of the underlying collateral, less selling costs, compared to the amortized cost basis of the loan. If the ACL is based on the operation of the collateral, the reserve is calculated based on the fair value of the collateral calculated as the present value of expected cash flows from the operation of the collateral, compared to the amortized cost basis. If the Company determines that the value of a collateral dependent loan is less than the recorded investment in the loan, the Company charges off the deficiency if it is determined that such amount is deemed to be a confirmed loss.

Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block]

Allowance for Unfunded Commitments

The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The reserve for unfunded commitments is adjusted through the provision for credit losses. The calculation of the allowance is consistent with the loss rate calculations for the loan portfolio described above. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded and the provision is recorded in ACL and the reserve is in "Other Liabilities" within the Company's Consolidated Balance Sheets.

Property, Plant and Equipment, Policy [Policy Text Block]

Premises and Equipment

Land is carried at cost. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Premises and equipment are depreciated over their estimated useful lives ranging from three years to thirty-nine years; leasehold improvements are amortized over the lives of the respective leases or the estimated useful lives of the improvements, whichever is less. Software is generally amortized over three years. Depreciation and amortization are recorded on the straight-line method.

Costs of maintenance and repairs are charged to expense as incurred. Costs of replacing structural parts of major units are considered individually and are expensed or capitalized as the facts dictate. Gains and losses on routine dispositions are reflected in current operations.

Goodwill and Intangible Assets, Policy [Policy Text Block]

Goodwill and Intangible Assets

Goodwill represents the excess of the cost of an acquired entity over the fair value of the identifiable net assets acquired. The Company follows Accounting Standards Codification ("ASC") 350, Intangibles - Goodwill and Other, which prescribes the accounting for goodwill and intangible assets subsequent to initial recognition. The Company performs its annual analysis as of June 30 each year. Goodwill is not amortized, but is subject to at least an annual assessment for impairment. Other acquired intangible assets with finite lives (such as core deposit intangibles) are initially recorded at estimated fair value and are amortized over their useful lives. Core deposit and other intangible assets are generally amortized using accelerated methods over their useful lives of five to ten years.

Lessee, Leases [Policy Text Block]

Leases

The Company determines if an arrangement is a lease at inception. All of the Company's leases are currently classified as operating leases and are included in other assets and other liabilities on the Company's Consolidated Balance Sheets. Periodic operating lease costs are recorded in occupancy expenses of premises on the Company's Consolidated Statements of Income.

Right-of-use ("ROU") assets represent the Company's right to use an underlying asset for the lease term, and lease liabilities represent the Company's obligation to make lease payments arising from the lease arrangements. Operating lease ROU assets and liabilities are recognized at the lease commencement date based on the present value of the expected future lease payments over the remaining lease term. In determining the present value of future lease payments, the Company uses its incremental borrowing rate based on the information available at the lease commencement date. The operating ROU assets are adjusted for any lease payments made at or before the lease commencement date, initial direct costs, any lease incentives received and, for acquired leases, any favorable or unfavorable fair value adjustments. The present value of the lease liability may include the impact of options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options provided in the lease terms. Lease expense is recognized on a straight-line basis over the expected lease term. Lease agreements that include lease and non-lease components, such as common area maintenance charges, are accounted for separately.

Wealth Management Assets [Policy Text Block]

Wealth Management Assets

Securities and other property held by the wealth management segment in a fiduciary or agency capacity are not assets of the Company and are not included in the accompanying consolidated financial statements.

Financing Receivable, Held-for-Investment, Foreclosed Asset [Policy Text Block]

Other Real Estate Owned ("OREO")

OREO represents real estate that has been acquired through loan foreclosures or deeds received in lieu of loan payments. Generally, such properties are appraised at the time acquired and are recorded at fair value less estimated selling costs. Subsequent to foreclosure, valuations are periodically performed by management, and the assets are carried at the lower of carrying amount or fair value less cost to sell. Revenue and expenses from operations and changes in the valuation allowance are included in noninterest expense.

Life Insurance, Bank Owned [Policy Text Block]

Bank Owned Life Insurance

In connection with mergers, the Company has acquired bank owned life insurance ("BOLI"). The asset is reflected as the cash surrender value of the policies as provided by the insurer on a monthly basis.

Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block]

Transfers of Financial Assets

Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company – put presumptively beyond reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.

Income Tax, Policy [Policy Text Block]

Income Taxes

The Company uses the balance sheet method to account for deferred income tax assets and liabilities. Under this method, the net deferred tax asset or liability is determined based on the tax effects of the temporary differences between the book and tax bases of the various balance sheet assets and liabilities and gives current recognition to changes in tax rates and laws.

When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not that the position will be sustained upon examination, including the resolution of appeals or litigation processes, if any. Tax positions taken are not offset or aggregated with other positions. Tax positions that meet the more-likely-than-not recognition threshold are measured as the largest amount of tax benefit that is more than 50 percent likely of being realized upon settlement with the applicable taxing authority. The portion of the benefits associated with tax positions taken that exceeds the amount measured as described above is reflected as a liability for unrecognized tax benefits in the accompanying consolidated balance sheet along with any associated interest and penalties that would be payable to the taxing authorities upon examination. The Company had no liability for unrecognized tax benefits as of December 31, 2023 and 2022.

Stock-Based Compensation

Stock compensation accounting guidance ASC 718, Compensation - Stock Compensation, requires that the compensation cost relating to share-based payment transactions be recognized in financial statements. That cost will be measured based on the grant date fair value of the equity or liability instruments issued. The stock compensation accounting guidance covers a wide range of share-based compensation arrangements including stock options, restricted share plans, performance-based awards, share appreciation rights, and employee share purchase plans.

The stock compensation accounting guidance requires that compensation cost for all stock awards be calculated and recognized over the employees' service period, generally defined as the vesting period. For awards with graded-vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. A Black-Scholes model is used to estimate the fair value of stock options, while the market price of the Company's common stock at the date of grant is used for restricted stock awards.

Earnings Per Share, Policy [Policy Text Block]

Earnings Per Common Share

Basic earnings per common share represent income available to common shareholders divided by the average number of common shares outstanding during the period. Diluted earnings per common share reflect the impact of additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company consist solely of outstanding stock options and are determined using the treasury method. Nonvested shares of restricted stock are included in the computation of basic earnings per share because the holder has voting rights and shares in non-forfeitable dividends during the vesting period.

Comprehensive Income, Policy [Policy Text Block]

Comprehensive Income

Comprehensive income is shown in a two statement approach; the first statement presents total net income and its components followed by a second statement that presents all the components of other comprehensive income which include unrealized gains and losses on available for sale securities, unrealized gains and losses on cash flow hedges, and changes in the funded status of the defined benefit postretirement plan.

Advertising Cost [Policy Text Block]

Advertising and Marketing Costs

Advertising and marketing costs are expensed as incurred.

Business Combinations Policy [Policy Text Block]

Mergers and Acquisitions

Business combinations are accounted for under ASC 805, Business Combinations, using the acquisition method of accounting. The acquisition method of accounting requires an acquirer to recognize the assets acquired and the liabilities assumed at the acquisition date measured at their fair values as of that date. To determine the fair values, the Company relies on third party valuations, such as appraisals, or internal valuations based on discounted cash flow analyses or other valuation techniques. Under the acquisition method of accounting, the Company identifies the acquirer and the closing date and applies applicable recognition principles and conditions. Acquisition-related costs are costs the Company incurs to effect a business combination. Those costs include advisory, legal, accounting, valuation, and other professional or consulting fees. Some other examples of costs to the Company include systems conversions, integration planning consultants and advertising costs. The Company accounts for acquisition-related costs as expenses in the periods in which the costs are incurred and the services are received, with one exception. The costs to issue debt or equity securities is recognized in accordance with other applicable GAAP. These acquisition-related costs have been and will be included within the consolidated statements of income classified within the noninterest expense caption. Merger related expenses were $2.6 million for the year ended December 31, 2023. There were no such acquisition related costs for the years ended December 31, 2022, or 2021.

Derivatives, Policy [Policy Text Block]

Derivative Financial Instruments

The Company uses derivatives primarily to manage risk associated with changing interest rates. The Company's derivative financial instruments consisted of interest rate swaps that qualify as cash flow hedges of the Company's trust preferred capital notes. The Company recognized derivative financial instruments at fair value as either an other asset or other liability in the consolidated balance sheets. The effective portion of the gain or loss on the Company's cash flow hedges was reported as a component of other comprehensive income, net of deferred income taxes, and was reclassified into earnings in the same period or periods during which the hedged transactions affect earnings. The company terminated the interest rate swaps in October 2023. See Note 12 - "Derivative Financial Instruments and Hedging Activities" for additional information.

Reclassification, Comparability Adjustment [Policy Text Block]

Reclassifications

Certain reclassifications have been made in prior years' financial statements to conform to classifications used in the current year. There were no material reclassifications.

New Accounting Pronouncements, Policy [Policy Text Block]

Accounting Standards Adopted in 2023

On January 1, 2023, the Company adopted Accounting Standards Update ("ASU") 2016-13, "Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." This standard replaced the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss ("CECL") methodology. CECL requires an estimate of credit losses from the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts and generally applies to financial assets measured at amortized cost, including loan receivables and some off-balance sheet credit exposures such as unfunded commitments to extend credit. Financial assets measured at amortized cost will be presented at the net amount expected to be collected by using an allowance for credit losses. In addition, CECL required changes to the accounting for available for sale debt securities. One such change is to require impairments deemed to be permanent in nature as credit losses to be presented as an allowance rather than as a write-down on available for sale debt securities. The adjustments recorded at adoption were increases to the allowance for credit losses on loans of $5.2 million, $305 thousand to the reserve for unfunded loan commitments and $1.2 million to deferred tax assets. The adjustment to retained earnings was a decrease of $4.2 million.

The Company adopted ASC 326 using the prospective transition approach for purchased credit deteriorated ("PCD") assets that were previously classified as purchased credit impaired ("PCI") under ASC 310-30. Results for reporting periods beginning after January 1, 2023 are presented under CECL while prior period amounts continue to be reported in accordance with previously applicable accounting standards ("Incurred Loss Model"). The Company adopted ASC 326 using the prospective transition approach for debt securities. The Company elected not to measure an allowance for credit losses for accrued interest receivable and instead elected to reverse interest income on loans that are placed on nonaccrual status, which is generally when the loan is 90 days past due, or earlier if the Company believes the collection of interest is doubtful.

In March 2022, the Financial Accounting Standards Board ("FASB") issued ASU 2022-02, "Financial Instruments-Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures." ASU 2022-02 addresses areas identified by FASB as part of its post-implementation review of the credit losses standard that introduced the CECL model. The amendments eliminate the accounting guidance for troubled debt restructurings ("TDRs") by creditors that have adopted the CECL model and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require a public business entity to disclose current-period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. The Company adopted the provision in ASU 2022-02 related to the recognition and measurement of TDRs on a prospective basis on January 1, 2023. The TDR classification is no longer applicable subsequent to December 31, 2022. The adoption of ASU 2022-02 did not have a material effect on the Company's consolidated financial statements. See Note 4 - "Loans" for discussion.

Information contained within the report prior to adoption of ASU 2022-02 and ASU 2016-13 for the year ended December 31, 2022 and 2021, respectively, reflects prior GAAP.

In December 2022, the FASB issued ASU 2022-06, "Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848." ASU 2022-06 extends the period of time preparers can utilize the reference rate reform relief guidance in Topic 848. The objective of the guidance in Topic 848 is to provide relief during the temporary transition period, so the FASB included a sunset provision within Topic 848 based on expectations of when the London Interbank Offered Rate ("LIBOR") would cease being published. In 2021, the UK Financial Conduct Authority (FCA) delayed the intended cessation date of certain tenors of USD LIBOR to June 30, 2023. To ensure the relief in Topic 848 covers the period of time during which a significant number of modifications may take place, the ASU defers the sunset date of Topic 848 from December 31, 2022, to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. The ASU was effective for all entities upon issuance. The Company adopted ASU 2022-06 in the year ended December 31, 2023. The adoption did not have a material effect on the Company's consolidated financial statements.

Recent Accounting Pronouncements

In December 2023, FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." The amendments in this ASU require an entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold, which is greater than five percent of the amount computed by multiplying pretax income by the entity's applicable statutory rate, on an annual basis. Additionally, the amendments in this ASU require an entity to disclose the amount of income taxes paid (net of refunds received) disaggregated by federal, state, and foreign taxes and the amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions that are equal to or greater than five percent of total income taxes paid (net of refunds received). Lastly, the amendments in this ASU require an entity to disclose income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign and income tax expense (or benefit) from continuing operations disaggregated by federal, state, and foreign. This ASU is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied on a prospective basis; however, retrospective application is permitted. The Company does not expect the adoption of ASU 2023-09 to have a material impact on its consolidated financial statements.

In November 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendments in this ASU are intended to improve reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. This ASU requires disclosure of significant segment expenses that are regularly provided to the chief operating decision mark ("CODM"), an amount for other segment items by reportable segment and a description of its composition, all annual disclosures required by FASB ASU Topic 280 in interim periods as well, and the title and position of the CODM and how the CODM uses the reported measures. Additionally, this ASU requires that at least one of the reported segment profit and loss measures should be the measure that is most consistent with the measurement principles used in an entity's consolidated financial statements. Lastly, this ASU requires public business entities with a single reportable segment to provide all disclosures required by these amendments in this ASU and all existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments should be applied retrospectively. The Company does not expect the adoption of ASU 2023-07 to have a material impact on its consolidated financial statements.

In October 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-06, "Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative." This ASU incorporates certain U.S. Securities and Exchange Commission ("SEC") disclosure requirements into the FASB Accounting Standards Codification. The amendments in the ASU are expected to clarify or improve disclosure and presentation requirements of a variety of Codification Topics, allow users to more easily compare entities subject to the SEC's existing disclosures with those entities that were not previously subject to the requirements, and align the requirements in the Codification with the SEC's regulations. For entities subject to the SEC's existing disclosure requirements and for entities required to file or furnish financial statements with or to the SEC in preparation for the sale of or for purposes of issuing securities that are not subject to contractual restrictions on transfer, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. For all other entities, the amendments will be effective two years later. However, if by June 30, 2027, the SEC has not removed the related disclosure from its regulations, the amendments will be removed from the Codification and not become effective for any entity. The Company does not expect the adoption of ASU 2023-06 to have a material impact on its consolidated financial statements.