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SUMMARY OF SIGNIFICANT ACCOUNTING AND REPORTING POLICIES (Policies)
 12 Months Ended
Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Presentation and Consolidation Basis of Presentation and Consolidation. The consolidated financial statements are prepared in conformity with U.S. GAAP and include the accounts of Southside Bancshares, Inc., and its wholly-owned subsidiary, Southside Bank and the nonbank subsidiaries.  All significant intercompany accounts and transactions are eliminated in consolidation.   We determine if we have a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a VIE under GAAP. 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. We consolidate voting interest entities in which we have all, or at least a majority of, the voting interest. As defined in applicable accounting standards, 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 an enterprise has both the power 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. The enterprise with a controlling financial interest, known as the primary beneficiary, consolidates the VIE.
Reclassifications Certain prior period amounts may be reclassified to conform to current period presentation.
Accounting Pronouncements
Current Expected Credit Losses
We adopted ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” on January 1, 2020, the effective date of the guidance. ASU 2016-13 replaced the incurred loss model with an expected loss methodology that is referred to as CECL. The CECL model is used to estimate credit losses on certain off-balance-sheet credit exposures and certain types of financial instruments measured at amortized cost including loan receivables and HTM debt securities. ASU 2016-13 also modified the impairment model on AFS debt securities, whereby credit losses are recognized as an allowance rather than a direct write-down of the AFS debt security. In addition, ASU 2016-13 modified the accounting model for PCD financial assets since their origination.
We adopted ASU 2016-13 using the modified retrospective approach for all financial assets measured at amortized cost and off-balance-sheet credit exposures. Adoption of this guidance on January 1, 2020, resulted in a cumulative-effect adjustment to reduce retained earnings by $7.8 million, net of tax. The impairment model for AFS securities was applied using a prospective approach.
We adopted ASU 2016-13 using the prospective transition approach for financial assets purchased with credit deterioration since their origination that were previously classified as PCI and accounted for under ASC 310-30. On the date of adoption, the amortized cost basis of the PCD assets was adjusted by an allowance for credit losses of $231,000. The remaining noncredit discount based upon the adjusted amortized cost basis will be accreted into interest income at the effective interest rate as of the date of adoption.
Accounting Pronouncements.
In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide relief for companies preparing for discontinuation of interest rates based on LIBOR. The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or other reference rates expected to be discontinued. ASU 2020-04 also provides for a one-time sale and/or transfer to AFS or trading to be made for HTM debt securities that both reference an eligible reference rate and were classified as HTM before January 1, 2020. ASU 2020-04 was effective for all entities as of March 12, 2020 and through December 31, 2022. Companies can apply the ASU as of the beginning of the interim period that includes March 12, 2020 or any date thereafter. The guidance requires companies to apply the guidance prospectively to contract modifications and hedging relationships while the one-time election to sell and/or transfer debt securities classified as HTM may be made any time after March 12, 2020. Additionally, in January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope,” which provided additional clarification that certain optional expedients and exceptions noted above apply to derivative instruments that use an interest rate for margining, discounting or contract price alignment that is modified as a result of reference rate reform. In December 2022, the FASB issued ASU 2022-06, “Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848,” which was effective upon issuance and deferred the sunset date in Topic 848 from December 31, 2022 to December 31, 2024. We established an officer level committee to guide our transition from LIBOR in October 2019 and are transitioning to alternative rates consistent with industry timelines. We continue to evaluate our LIBOR exposure. The trust preferred subordinated debentures will transition to an adjusted SOFR index in accordance with the Federal Reserve final rule implementing the Adjustable Interest Rate Act. Our cash flow hedges will transition to an adjusted SOFR index in accordance with the ISDA 2020 IBOR Fallbacks Protocol. We have identified our products that utilize LIBOR and have implemented enhanced fallback language to facilitate the transition to alternative reference rates. We are evaluating existing systems and have begun offering alternative rates. We are no longer offering LIBOR indexed rates on newly originated loans. ASU 2020-04 and ASU 2021-01 are not expected to have a material impact on our consolidated financial statements.
In March 2022, the FASB issued ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 eliminates the accounting guidance for TDRs, while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance to determine whether a modification results in a new loan or a continuation of an existing loan. Additionally, ASU 2022-02 requires an entity to disclose current-period gross write-offs by year of origination for financing receivables within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost. ASU 2022-02 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022 for companies that have adopted CECL, which we adopted on January 1, 2020. Early adoption is permitted. The guidance should be applied prospectively with the option to use a modified retrospective transition method for the recognition and measurement of TDRs, resulting in a cumulative-effect adjustment to retained earnings. We adopted ASU 2022-02 on January 1, 2023 on a prospective basis. ASU 2022-02 did not have a material impact on our consolidated financial statements.
In June 2022, the FASB issued ASU 2022-03, “Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions.” ASU 2022-03 clarifies that a contractual restriction on the sale of an equity security should not be considered in measuring fair value. It also requires the following disclosures for equity securities subject to the contractual sale restrictions: 1) the fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; 2) the nature and remaining duration of the restriction(s); and 3) the circumstances that could cause a lapse in the restriction(s). ASU 2022-03 is effective for the fiscal years and interim periods within those fiscal years, beginning after December 15, 2023. Early adoption is permitted. The guidance should be applied prospectively. ASU 2022-04 is not expected to have a material impact on our consolidated financial statements.
Use of Estimates Use of Estimates.  In preparing consolidated financial statements in conformity with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period.  These estimates are subjective in nature and involve matters of judgment.  Actual results could differ from these estimates.  Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for credit losses.  The status of contingencies are particularly subject to change.
Segment Information Segment Information.  Operating segments are components of a business about which separate financial information is available and that are evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and assess performance. Our chief operating decision-maker uses consolidated results to make operating and strategic decisions. Therefore, we have determined that our business is conducted in one reportable segment.
Cash Equivalents Cash Equivalents.  Cash equivalents, for purposes of reporting cash flow, include cash, amounts due from banks and federal funds sold that have an initial maturity of less than 90 days.  We maintain deposits with other institutions in amounts that exceed federal deposit insurance coverage.  Management regularly evaluates the credit risk associated with the counterparties to these transactions and believes that we are not exposed to any significant credit risks on cash and cash equivalents.
Basic and Diluted Earnings per Common Share Basic and Diluted Earnings per Common Share.  Basic earnings per common share is based on net income divided by the weighted-average number of common shares outstanding during the period.  Diluted earnings per common share include the dilutive effect of stock awards granted using the treasury stock method.
Comprehensive Income Comprehensive Income.  Comprehensive income includes all changes in shareholders’ equity during a period, except those resulting from transactions with shareholders.  Besides net income, other components of comprehensive income include the after tax effect of changes in the fair value of AFS securities, changes in the net unrealized loss on securities transferred to/from HTM, changes in the accumulated gain or loss on effective cash flow hedging instruments and changes in the funded status of defined benefit retirement plans.
Loans Loans.  Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at amortized cost. Amortized cost consists of the outstanding principal balance adjusted for any charge-offs and any unamortized origination fees and unamortized premiums or discounts on purchased loans. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income over the life of the loan.  A loan is considered impaired, based on current information and events, if it is probable that we will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement.  Substantially all of our impaired loans are collateral-dependent, and as such, are measured for impairment based on the fair value of the collateral.
Loans Held For Sale Loans Held For Sale.  Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors or current investor yield requirements.  Net unrealized losses are recognized through a valuation allowance by charges to income. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold.
Loan Fees Loan Fees.  We treat loan fees, net of direct costs, as an adjustment to the yield of the related loan over its term.
Allowance for Credit Losses - Loans
Allowance for Credit Losses - Loans.  In accordance with ASC 326, the allowance for credit losses on loans is estimated and recognized upon origination of the loan based on expected credit losses. The CECL model uses historical experience and current conditions for homogeneous pools of loans, and reasonable and supportable forecasts about future events. The impact of varying economic conditions and portfolio stress factors are a component of the credit loss models applied to each portfolio. Reserve factors are specific to the loan segments that share similar risk characteristics based on the probability of default assumptions and loss given default assumptions, over the contractual term. The forecasted periods gradually mean-revert the economic inputs to their long-run historical trends. Management evaluates the economic data points used in the Moody’s forecasting scenarios on a quarterly basis to determine the most appropriate impact to the various portfolio characteristics based on management’s view and applies weighting to various forecasting scenarios as deemed appropriate based on known and expected economic activities. Management also considers and may apply relevant qualitative factors, not previously considered, to determine the appropriate allowance level. The use of the CECL model includes significant judgment by management and may differ from those of our peers due to different historical loss patterns, economic forecasts, and the length of time of the reasonable and supportable forecast period and reversion period.
We utilize Moody’s Analytics economic forecast scenarios and assign probability weighting to those scenarios which best reflect management’s views on the economic forecast. The probability weighting and scenarios utilized for the estimate of the allowance were generally reflective of improved asset quality, offset slightly by continued economic uncertainty related to inflation and recessionary concerns, as based on known and knowable information as of December 31, 2022.
When determining the appropriate allowance for credit losses on our loan portfolio, our commercial construction and real estate loans, commercial loans and municipal loans utilize the probability of default/loss given default discounted cash flow approach. Reserves on these loans are based upon risk factors including the loan type and structure, collateral type, leverage ratio, refinancing risk and origination quality, among others. Our consumer construction real estate loans, 1-4 family residential loans and our loans to individuals use a loss rate based upon risk factors including loan types, origination year and credit scores.
Loans evaluated collectively in a pool are monitored to ensure they continue to exhibit similar risk characteristics with other loans in the pool. If a loan does not share similar risk characteristics with other loans, expected credit losses for that loan are evaluated individually.
When assessing for credit losses from period to period, the change may be indicative of changes in the estimates of timing or the amount of future cash flows, based on the probability of economic forecast scenarios applied, as well as the passage of time. We have elected to report the entire change in present value as provision for credit losses. When using the discounted cash flow method to determine the allowance for credit losses, management does not adjust the effective interest rate used to discount expected cash flows to incorporate expected prepayments, but rather applies separate prepayment factors.
Accrued Interest Accrued Interest. Accrued interest for our loans and debt securities, included in interest receivable on our consolidated balance sheets, is excluded from the estimate of allowance for credit losses.
Nonaccrual Assets and Loan Charge-offs
Nonaccrual Assets and Loan Charge-offs. Nonaccrual assets include financial assets 90 days or more delinquent and full collection of both principal and interest is not expected.  Financial instruments that are not delinquent or that are delinquent less than 90 days may be placed on nonaccrual status if it is probable that we will not receive contractual principal or interest. When an asset is categorized as nonaccrual, the accrual of interest is discontinued and any accrued balance is reversed for financial statement purposes. Payments received on nonaccrual assets are applied to the outstanding principal balance. Payments of contractual interest are recognized as income only to the extent that full recovery of the principal balance is reasonably certain.  Assets are returned to accrual status when all payments contractually due are brought current and future payments are reasonably assured.  
Industry and our own experience indicate that a portion of our loans will become delinquent and a portion of our loans will require partial or full charge-off.  Regardless of the underwriting criteria utilized, losses may occur as a result of various factors beyond our control, including, among other things, changes in market conditions affecting the value of properties used as collateral for loans and problems affecting the credit worthiness of the borrower and the ability of the borrower to make payments on the loan. We charge-off loans when deemed uncollectible. Our policy is to charge-off or partially charge-off a retail credit after it is 120 days past due. Charge-offs on commercial credits are determined on a case-by-case basis when a credit loss has been determined.
Purchased Credit Deteriorated Loans PCD Loans. We have purchased certain loans that as of the date of purchase have experienced more-than-insignificant deterioration in credit quality since origination. Management evaluates these loans against a probability threshold to determine if substantially all of the contractually required payments will be received. With the adoption of ASU 2016-13, PCD loans are recorded at the purchase price plus an allowance for credit losses which becomes the PCD loan's initial amortized cost. The non-credit related discount or premium, the difference between the initial amortized cost and the par value, will be amortized into interest income over the life of the loan. Any further changes to the allowance for credit losses are recorded through provision expense. Prior to the adoption of ASU 2016-13, acquired loans considered PCI were measured at fair value at acquisition date. The difference in expected cash flows at the acquisition date in excess of the fair value was recorded as interest income over the life of the loan. In accordance with the adoption of ASU 2016-13, management did not reassess whether PCI assets met the criteria of PCD assets and elected to not maintain pools of loans as of the date of adoption. All PCD loans are evaluated based upon product type within the underlying segment.
Troubled Debt Restructuring TDRs. A loan is considered a TDR if the original terms of a loan are modified and concessions are made to accommodate a borrower experiencing financial duress. The modification or concession may include reduction of interest rates, reduced payment amounts, and/or extension of terms, among others. The likelihood of initiating a TDR is evaluated at each reporting date for each loan. This evaluation is based on qualitative judgments made by management on a case-by-case basis. If a reasonable expectation of a TDR exists, the expected credit loss is adjusted for any potential delays and/or modifications and disclosed as a reasonably expected TDR.
Other Real Estate Owned OREO and Foreclosed Assets.  OREO includes real estate acquired in full or partial settlement of loan obligations.  OREO is initially carried at the fair value of the collateral net of estimated selling costs.  Prior to foreclosure, the recorded amount of the loan is written down, if necessary, to the appraised fair value of the real estate to be acquired, less selling costs, by charging the allowance for loan losses.  Any subsequent reduction in fair value net of estimated selling costs is charged to noninterest expense. Costs of maintaining and operating foreclosed properties are expensed as incurred and included in other expense in our income statement.  Expenditures to complete or improve foreclosed properties are capitalized only if expected to be recovered; otherwise, they are expensed.
Foreclosed Assets Other foreclosed assets are held for sale and are initially recorded at fair value less estimated selling costs at the date of foreclosure, by charging the allowance for loan losses. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less costs to sell. Foreclosed assets are included in other assets in the accompanying consolidated balance sheets. Expenses from operations and changes in the valuation allowance are included in noninterest expense.
Securities Securities.  AFS.  Debt securities that will be held for indefinite periods of time, including securities that may be sold in response to changes in market interest or prepayment rates, needs for liquidity or changes in the availability of and the yield on
alternative investments are classified as AFS.  These assets are carried at fair value with unrealized gains and losses, not related to credit losses, reported as a separate component of AOCI, net of tax.  Fair value is determined using quoted market prices as of the close of business on the balance sheet date.  If quoted market prices are not available, fair values are based on quoted market prices for similar securities or estimates from independent pricing services. AFS securities hedged with qualifying derivatives are carried at fair value with the change in the fair value on both the hedged instrument and the securities recorded in interest income in the consolidated statements of income.
Gains and losses on the sale of securities are recorded in the month of the trade date and are determined using the specific identification method.
HTM. Debt securities that management has the positive intent and ability to hold until maturity are classified as HTM and are carried at their amortized cost which includes the remaining unpaid principal balance, net of unamortized premiums or unaccreted discounts. Our HTM securities are presented on the consolidated balance sheets net of allowance for credit losses, if any. As of December 31, 2022, there was no allowance for credit losses on our HTM securities portfolio.
Premiums and Discounts. Premiums and discounts on debt securities are generally amortized over the contractual life of the security, except for MBS where prepayments are anticipated and for callable debt securities whose premiums are amortized to the earliest call date in accordance with ASC 310. The amortization of purchased premium or discount is included in interest income on our consolidated statements of income. Gains and losses on the sale of securities are recorded in the month of the trade date and are determined using the specific identification method. Premiums on debt securities are amortized to the earliest call date.
Equity Investments. Equity investments with readily determinable fair values are stated at fair value with the unrealized gains and losses reported in other noninterest income in the consolidated statements of income. Equity investments without readily determinable fair values are recorded at cost less impairment, if any.
Allowance for Credit Losses - Debt Securities
Allowance for Credit Losses - AFS Securities. In accordance with ASC 326, for AFS debt securities in an unrealized loss position where management (i) has the intent to sell or (ii) where it will more-likely-than-not be required to sell the security before the recovery of its amortized cost basis, we recognize the loss in earnings. For those AFS debt securities in an unrealized loss position that do not meet either of these criteria, management assesses whether the decline in fair value has resulted from credit losses or other factors. Management assesses the financial condition and near-term prospects of the issuer, industry and/or geographic conditions, credit ratings as well as other indicators at the individual security level. If a credit loss is determined to exist, the present value of discounted cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of discounted cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit loss is recorded, limited by the amount that the fair value is less than the amortized cost. Any impairment that is not recorded through an allowance for credit losses is recognized in other comprehensive income. Any future changes in the allowance for credit losses is recorded as provision for (reversal of) credit losses.
Allowance for Credit Losses - HTM Securities. In accordance with ASC 326, expected credit losses on HTM securities are measured on a collective basis by major security type, when similar risk characteristics exist. Risk characteristics for segmenting HTM debt securities include issuer, maturity, coupon rate, yield, payment frequency, source of repayment, bond payment structure, and embedded options. Upon assignment of the risk characteristics to the major security types, management may further evaluate the qualitative factors associated with these securities to determine the expectation of credit losses, if any.
The major security types within our HTM portfolio include residential and commercial MBS, state and political subdivisions and corporate securities.
Our state and political subdivisions include highly-rated municipal securities with a long history of no credit losses. Our investment policy prohibits bond purchases with a rating less than BAA and limits our entity concentration. We utilize term structures and due to no prior loss exposure on our state and political subdivision securities, we apply third-party average data to model our securities to represent the portion of the asset that would be lost if the issuer were to default. These third-party estimates of recoveries and defaults, adjusted for constant probability over the securities expected life, are used to evaluate the expected loss of the securities. Due to the limited number and the nature of the HTM state and political subdivisions we hold, we do not model these securities as a pool, but on the specific identification method in conjunction with the application of our third-party fair value measurement.
Our residential and commercial MBS are issued and/or guaranteed by U.S. government agencies or GSEs and are collateralized by pools of single- or multi-family mortgages. Our MBS are highly rated securities with a long history of no credit losses which are either explicitly or implicitly backed by the U.S. government agencies, which guarantee the payment of principal and interest to investors. Management has collectively evaluated the characteristics of these securities and has assumed an expectation of zero credit loss.
Our corporate bonds and other investment securities consist of investment grade bonds and private placement bonds with a long history of no credit losses.
We reevaluate the characteristics of our major security types at every reporting period and reassess the considerations to continue to support our expectation of credit loss.
Securities with Limited Marketability Securities with Limited Marketability. Securities with limited marketability, such as stock in the FHLB, are carried at cost, which is a reasonable estimate of the fair value of those assets and are assessed for other-than-temporary impairment.
Premises and Equipment Premises and Equipment.  Land is carried at cost. Bank premises and equipment are stated at cost, net of accumulated depreciation.  Depreciation is computed on a straight line basis over the estimated useful lives of the related assets.  Useful lives are estimated to be 15 to 40 years for premises and 3 to 10 years for equipment.  Leasehold improvements are generally depreciated over the lesser of the term of the respective leases or the estimated useful lives of the improvements.  Maintenance and repairs are charged to expense as incurred while major improvements and replacements are capitalized.
Leases Leases. We evaluate our contracts at inception to determine if an arrangement is or contains a lease. Operating leases are included in operating lease ROU assets and operating lease liabilities in our consolidated balance sheets. Our operating leases relate primarily to bank branches and office space. The Company has no finance leases. Short-term leases, leases with an initial term of 12 months or less and do not contain a purchase option that is likely to be exercised, are not recorded on the balance sheet.ROU assets represent our right to use an underlying asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of the future lease payments over the lease term. Our leases do not provide an implicit rate, so we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The incremental borrowing rate is reevaluated upon lease modification. The operating lease ROU asset also includes any initial direct costs and prepaid lease payments made less any lease incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.
Bank Owned Life Insurance BOLI.  The Company has purchased life insurance policies on certain key executives. BOLI is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Changes in the net cash surrender value of the policies, as well as insurance proceeds received are reflected in noninterest income on the consolidated statements of income and are not subject to income taxes.
Goodwill and Other Intangibles Goodwill and Other Intangibles.  Other intangible assets consist primarily of core deposits and trust relationship intangibles. Intangible assets with definite useful lives are amortized on an accelerated basis over their estimated life. Goodwill and intangible assets that have indefinite useful lives are subject to at least an annual impairment test and more frequently if a triggering event occurs. If any such impairment is determined, a write-down is recorded.We have selected October 1 of each year as the measurement date on which we will complete our annual goodwill impairment assessment.
Repurchase Agreements Repurchase Agreements.  We sell certain securities under agreements to repurchase.  The agreements are treated as collateralized financing transactions and the obligations to repurchase securities sold are reflected as a liability in the accompanying consolidated balance sheets.  The dollar amount of the securities underlying the agreements remains in the asset account.  We determine the type of debt securities to pledge which may include investment securities and U.S. agency MBS.
Derivative Financial Instruments and Hedging Activities
Derivative Financial Instruments and Hedging Activities. Derivative financial instruments are carried on the consolidated balance sheets as other assets or other liabilities, as applicable, at estimated fair value. The accounting for changes in the fair value (i.e., gains or losses) of a derivative financial instrument is determined by whether it has been designated and qualifies as part of a hedging relationship and, further, by the type of hedging relationship. We present derivative financial instruments at fair value in the consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty and any cash collateral paid to and/or received from that counterparty for derivative contracts that are subject to legally enforceable master netting arrangements.
For derivative instruments that are designated and qualify as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of AOCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The remaining gain or loss on the derivative instrument in excess of the cumulative change
in the present value of future cash flows of the hedged item (i.e., the ineffective portion), if any, is recognized in current earnings during the period of change. Gains and losses on derivative instruments designated as fair value hedges, as well as the change in the fair value on the hedged item, are recorded in interest income in the consolidated statements of income. Gains and losses due to changes in the fair value of the interest rate swap agreements completely offset changes in the fair value of the hedged portion of the hedged item. For derivative instruments not designated as hedging instruments, the gain or loss is recognized in current earnings during the period of change.
During the year ended December 31, 2022, we entered into partial term fair value hedges, as allowed under ASU 2017-12, for certain of our fixed rate callable AFS municipal securities. The instruments are designated as fair value hedges as the changes in the fair value of the interest rate swap are expected to offset changes in the fair value of the hedged item attributable to changes in the SOFR swap rate, the designated benchmark interest rate. These derivative contracts involve the receipt of floating rate interest from a counterparty in exchange for us making fixed-rate payments over the life of the agreement, without the exchange of the underlying notional value. The change in the fair value of these hedging instruments is recorded in AOCI and is subsequently reclassified into earnings in the period that the hedged transactions affects earnings.
For derivatives designated as hedging instruments at inception, statistical regression analysis is used at inception and for each reporting period thereafter to assess whether the derivative used has been and is expected to be highly effective in offsetting changes in the fair value or cash flows of the hedged item. All components of each derivative instrument’s gain or loss are included in the assessment of hedge effectiveness. Net hedge ineffectiveness is recorded in other noninterest income on the consolidated statements of income.
Terminated Derivative Financial Instruments. In accordance with ASC Topic 815, if a hedging item is terminated prior to maturity for a cash settlement, the existing gain or loss within AOCI will continue to be reclassified into earnings during the period or periods in which the hedged forecasted transaction affects earnings unless it is probable the forecasted transaction will not occur by the end of the originally specified time period. These transactions are reevaluated on a monthly basis to determine if the hedged forecasted transactions are still probable of occurring. If at a subsequent evaluation, it is determined that the transactions will not occur, any related gains or losses recorded in AOCI are immediately recognized in earnings.
Allowance for Credit Losses - Off-Balance-Sheet Credit Exposures Allowance for Credit Losses - Off-Balance-Sheet Credit Exposures. Our off-balance-sheet credit exposures include contractual commitments to extend credit and standby letters of credit. For these credit exposures we evaluate the expected credit losses using usage given defaults and credit conversion factors depending on the type of commitment and based upon historical usage rates. These assumptions are reevaluated on an annual basis and adjusted if necessary.  In accordance with Topic 326, credit losses are not recognized for those credit exposures that are unconditionally cancellable by the Company.The allowance for credit losses for these off-balance-sheet credit exposures is included in other liabilities on our consolidated balance sheets and is adjusted with a corresponding adjustment to provision for credit losses on our consolidated statements of income.
Revenue Recognition
Revenue Recognition. Our revenue consists of net interest income on financial assets and financial liabilities and noninterest income.  The classifications of our revenue are presented in the consolidated statements of income.
In accordance with ASC Topic 606, revenue is recognized when obligations under the terms of a contract with our customer are satisfied; generally this occurs with the transfer of control of goods or services. We recognize revenue equal to the amounts for which we have a right to invoice, revenue is measured as the amount of consideration we expect to receive in exchange for the transfer of those goods or services. We generally expense sales commissions when incurred because the amortization period is within one year or less. These costs are recorded within salaries and employee benefits on the consolidated statements of income.
The following summarizes our revenue recognition policies as they relate to revenue from contracts with customers:
•Deposit services. Service charges on deposit accounts include fees for banking services provided, overdrafts and non-sufficient funds. Revenue is generally recognized in accordance with published deposit account agreements for retail accounts or contractual agreements for commercial accounts. Our deposit services also include our ATM and debit card interchange revenue that is presented net of the associated costs. Interchange revenue is generated by our deposit customers’ usage and volume of activity. Interchange rates are not controlled by the Company, which effectively acts as processor that collects and remits payments associated with customer debit card transactions.
•Trust income. Trust income includes fees and commissions from investment management, administrative and advisory services primarily for individuals, and to a lesser extent, partnerships and corporations. Revenue is recognized on an accrual basis at the time the services are performed and when we have a right to invoice and are based on either the market value of the assets managed or the services provided.
•Brokerage services. Brokerage services income includes fees and commissions charged when we arrange for another party to transfer brokerage services to a customer. The fees and commissions under this agent relationship are based upon stated fee schedules based upon the type of transaction, volume and value of the services provided.
•Other noninterest income. Other noninterest income includes among other things, merchant services income. Merchant services revenue is derived from third-party vendors that process credit card transactions on behalf of our merchant customers. Merchant services revenue is primarily comprised of residual fee income based on the referred merchant’s processing volumes and/or margin.
Income Taxes Income Taxes.  We file a consolidated federal income tax return.  Income tax expense represents the taxes expected to be paid or returned for current year taxes adjusted for the change in deferred tax assets and liabilities. 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 changes in tax rates is recognized in income in the period the change occurs. Uncertain tax positions arise when it is more likely than not that the tax position taken will be sustained upon examination by the appropriate tax authority. Any income tax benefit as well as penalties and interest related to income tax expense are recorded as a component of income tax expense.
Fair Value of Financial Instruments Fair Value of Financial Instruments.  Fair values of financial instruments are estimated using relevant market information and other assumptions.  Fair value estimates involve uncertainties and matters of significant judgment.  In cases where quoted market prices are not available, fair values are based on estimates using present value or other estimation techniques.  Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows.
Retirement Plan Retirement Plan.  Defined benefit pension obligations and the annual pension costs are determined by independent actuaries and through the use of a number of assumptions that are reviewed by management. These assumptions include a compensation rate increase, a discount rate used to determine the current benefit obligation and a long-term expected rate of return on plan assets. Net periodic defined benefit pension expense includes service cost, interest cost based on the assumed discount rate, an expected return on plan assets, amortization of prior service cost and amortization of net actuarial gains or losses. Prior service costs include the impact of plan amendments on the liabilities and are amortized over the future service periods of active employees expected to receive benefits under the retirement plan. Actuarial gains and losses result from experience different from that assumed and from changes in assumptions. Amortization of actuarial gains and losses is included as a component of net periodic defined benefit pension cost. Prior to the freeze of all future benefit accruals and accrual of benefit service as of December 31, 2020, the service cost component was recorded on our consolidated income statement as salaries and employee benefits in noninterest expense. All other components other than service cost are recorded in other noninterest expense.
Share-Based Awards Share-Based Awards.  Compensation expense for NQSOs and RSUs is based on the fair value on the date of the grant and is recorded over the grant’s vesting period. Compensation expense for PSUs is based on the fair value on the date of the grant and is recorded over the service period of the award based upon the probable number of units expected to vest. Share-based compensation for employees is recognized as compensation cost in the consolidated statements of income. Share-based compensation for non-employee directors is recognized as other noninterest expense in the consolidated statements of income.
Loss Contingencies Loss Contingencies.  Loss contingencies, including claims and legal actions arising in the ordinary course of business are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated.
Wealth Management and Trust Assets Wealth Management and Trust Assets.  Our wealth management and trust assets, other than cash on deposit at Southside Bank, are not included in the accompanying financial statements, because they are not our assets.