Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	In the opinion of the Company, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the consolidated financial position of the Company as of March 31, 2021, the consolidated results of operations for the three months ended March 31, 2021 and 2020, and the consolidated cash flows for the three months ended March 31, 2021 and 2020. Any such adjustments were of a normal, recurring nature. Reference is made to the 2020 Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) for a discussion of accounting policies and other relevant information with respect to the financial statements. The results of operations for the periods ended March 31, 2021 and 2020 are not necessarily indicative of the results to be expected for the full year. The Company has evaluated all subsequent events through the date the financial statements were issued.
Accounting Standards Adopted in 2021	Note 1 to the 2020 Annual Report on Form 10-K filed with the SEC contains a description of the accounting policies followed by the Company and a discussion of recent accounting pronouncements. The following paragraphs update that information as necessary. Accounting Standards Adopted in 2021 On January 1, 2021, the Company adopted Accounting Standards Codification ("ASC") 326 ("CECL"), which replaced the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held to maturity debt securities. It also applies to off-balance sheet credit exposures, such as unfunded commitments to extend credit. In addition, CECL made changes to the accounting for available for sale debt securities. One such change is to require credit losses to be presented as an allowance rather than as a write-down on available for sale debt securities if management does not intend to sell and does not believe that it is more likely than not they will be required to sell. The Company adopted CECL as of January 1, 2021 using the modified retrospective method for all financial assets measured at amortized cost and off-balance sheet credit exposures. Results for reporting periods beginning after January 1, 2021 are presented under CECL while prior period amounts continue to be reported in accordance with previously applicable accounting standards (“Incurred Loss”). The transition adjustment of the adoption of CECL included an increase in the allowance for credit losses on loans of $14.6 million, which is presented as a reduction to loans outstanding, and an increase in the allowance for credit losses on unfunded loan commitments of $7.5 million, which is recorded within Other Liabilities. The adoption of CECL had an insignificant impact on the Company's held to maturity and available for sale securities portfolios. The Company recorded a net decrease to retained earnings of $17.1 million as of January 1, 2021 for the cumulative effect of adopting CECL, which reflects the transition adjustments noted above, net of the applicable deferred tax assets recorded. Federal banking regulatory agencies provided optional relief to delay the adverse regulatory capital impact of CECL at adoption. The Company did not elect the option. The Company adopted CECL using the prospective transition approach for PCD assets that were previously classified as PCI under ASC 310-30. In accordance with the standard, management did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. The amortized cost basis of the PCD assets was adjusted to reflect the addition of $0.1 million of the allowance for credit losses. The remaining noncredit discount (based on the adjusted amortized cost basis) will be accreted into interest income at a rate that approximates the effective interest rate as of January 1, 2021. With regard to PCD assets, because the Company elected to disaggregate the former PCI pools and no longer considers these pools to be the unit of account, contractually delinquent PCD loans will be reported as nonaccrual loans using the same criteria as other loans. Similarly, although management did not reassess whether modifications to individual acquired financial assets accounted for in pools were TDRs as of the date of adoption, PCD loans that are restructured and meet the definition of troubled debt restructurings after the adoption of CECL will be reported as such. Accrued interest for all financial instruments is included in a separate line on the face of the Consolidated Balance Sheets. The Company elected not to measure an allowance for credit losses for accrued interest receivable and instead elected to reverse interest income on loans or securities that are placed on nonaccrual status, which is generally when the instrument is 90 days past due, or earlier if the Company believes the collection of interest is doubtful. The Company has concluded that this policy results in the timely reversal of uncollectable interest. The allowance for credit losses for the majority of loans was calculated using a discounted cash flow methodology applied at a loan level with a one-year reasonable and supportable forecast period and a three-year straight-line reversion period. The Company elected to use, as a practical expedient, the fair value of collateral when determining the allowance for credit losses on loans for which repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty (collateral-dependent loans). The Company's CECL allowances will fluctuate over time due to macroeconomic conditions and forecasts as well as the size and composition of the loan portfolios. In August 2018, the FASB amended the Compensation - Retirement Benefits – Defined Benefit Plans Topic of the Accounting Standards Codification to improve disclosure requirements for employers that sponsor defined benefit pension and other postretirement plans. The guidance removed disclosures that were no longer considered cost-beneficial, clarified the specific requirements of disclosures, and added disclosure requirements identified as relevant. The amendments were effective for the Company on January 1, 2021 and the adoption of this amendment did not have a material effect on its financial statements. Securities - Debt securities that the Company has the positive intent and ability to hold to maturity are classified as “held to maturity” and carried at amortized cost. Debt securities not classified as held to maturity are classified as “available for sale” and carried at fair value, with unrealized holding gains and losses being reported as other comprehensive income or loss and reported as a separate component of shareholders’ equity. Interest income includes amortization or purchase premiums or discounts. Premiums and discounts are generally amortized into income on a level yield basis, with premiums being amortized to the earliest call date and discounts being accreted to the stated maturity date. Gains and losses on sales of securities are recognized at the time of sale based upon the specific identification method. A debt security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent. Interest accrued but not received for a security placed on nonaccrual is reversed against interest income. Allowance for Credit Losses - Securities Held to Maturity - Since the adoption of ASC 326 (CECL), the Company measures expected credit losses on held to maturity debt securities on an individual security basis. Accrued interest receivable on held to maturity debt securities totaled $1.12 million at March 31, 2021 and was excluded from the estimate of credit losses. The estimate of expected credit losses is primarily based on the ratings assigned to the securities by debt rating agencies and the average of the annual historical loss rates associated with those ratings. The Company then multiplies those loss rates, as adjusted for any modifications to reflect current conditions and reasonable and supportable forecasts as considered necessary, by the remaining lives of each individual security to arrive at a lifetime expected loss amount. Virtually all of the mortgage-backed securities held by the Company are issued by government-sponsored corporations. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The state and local governments securities held by the Company are highly rating by major rating agencies. As a result, the allowance for credit losses on held to maturity securities was immaterial at March 31, 2021. Allowance for Credit Losses - Securities Available for Sale - For available for sale debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or if it is more likely than not that it will be required to sell the security before recovery of the amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security's amortized cost basis is written down to fair value through income with the establishment of an allowance under CECL compared to a direct write down of the security under Incurred Loss. For debt securities available for sale that do not meet the aforementioned criteria, the Company evaluates whether any decline in fair value is due to credit loss factors. In making this assessment, management considers any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Changes in the allowance for credit losses under CECL are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the allowance when management believes the uncollectibility of an available-for-sale security is confirmed or when either of the criteria regarding intent or requirement to sell is met. At March 31, 2021, there was no allowance for credit losses related to the available-for-sale portfolio. Accrued interest receivable on available for sale debt securities totaled $3.34 million at March 31, 2021 and was excluded from the estimate of credit losses. Loans - Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts and deferred fees and costs. Accrued interest receivable related to loans totaled $14.2 million at March 31, 2021 and was reported in accrued interest receivable on the consolidated balance sheets. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using methods that approximate a level yield without anticipating prepayments. The accrual of interest is generally discontinued when a loan becomes 90 days past due and is not well collateralized and in the process of collection, or when management believes, after considering economic and business conditions and collection efforts, that the principal or interest will not be collectible in the normal course of business. Past due status is based on contractual terms of the loan. A loan is considered to be past due when a scheduled payment has not been received 30 days after the contractual due date. All accrued interest is reversed against interest income when a loan is placed on nonaccrual status. Interest received on such loans is accounted for using the cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current, there is a sustained period of repayment performance, and future payments are reasonably assured. Purchased Credit Deteriorated (PCD) Loans - Upon adoption of CECL, loans that were designated as purchased credit impaired (PCI) loans under the previous accounting guidance were classified as PCD loans without reassessment. The amount of PCD loans was immaterial at each period end. In future acquisitions, the Company may purchase loans, some of which have experienced more than insignificant credit deterioration since origination. In those cases, the Company will consider internal loan grades, delinquency status and other relevant factors in assessing whether purchased loans are PCD. PCD loans are recorded at the amount paid. An initial allowance for credit losses is determined using the same methodology as other loans held for investment, but with no impact to earnings. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan's purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent to initial recognition, PCD loans are subject to the same interest income recognition and impairment model as non-PCD loans, with changes to the allowance for loan losses recorded through provision expense. Allowance for Credit Losses - Loans - The allowance for credit losses is a valuation account that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a loan balance is confirmed. Estimated recoveries are considered for post-CECL adoption date charge-offs to the extend that they do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Accrued interest receivable is excluded from the estimate of credit losses. The allowance for credit losses is measured on a collective pool basis when similar risk characteristics exist. Loans with similar risk characteristics are grouped into homogenous segments, or pools, for analysis. The Discounted Cash Flow (“DCF”) method is utilized for substantially all pools, with discounted cash flows computed for each loan in a pool based on its individual characteristics (e.g. maturity date, payment amount, interest rate, etc.), and the results are aggregated at the pool level. A probability of default and loss given default, as adjusted for recoveries (as noted above), are applied to the discounted cash flows for each pool, while considering prepayment and principal curtailment effects. The analysis produces a discounted expected cash flow total for each pool, which is then compared to the amortized cost of the pool to arrive at the expected credit loss. In determining the proper level of default rates and loss given default, management has determined that the loss experience of the Company provides the best basis for its assessment of expected credit losses. It therefore utilized its own historical credit loss experience by each loan segment over an economic cycle, while excluding loss experience from certain acquired institutions (i.e., failed banks). Management considers forward-looking information in estimating expected credit losses. For substantially all segments of collectively evaluated loans, the Company incorporates two or more macroeconomic drivers using a statistical regression modeling methodology. The Company subscribes to a third-party service which provides a quarterly macroeconomic baseline outlook and alternative scenarios for the United States economy. The baseline, along with the evaluation of alternative scenarios, is evaluated by management to determine the best estimate within the range of expected credit losses. The baseline forecast incorporates an equal probability of the United States economy performing better or worse than this projection. With the ongoing pandemic, along with periodic starts and stops to reopening the economy and the impact of government stimulus, the baseline and alternative scenarios have reflected a high degree of volatility in economic forecasts from month-to-month. The Company based it's adoption date allowance for credit loss adjustment primarily on the baseline forecast, which reflected ongoing threats to the economy, primarily arising from the pandemic. In reviewing the March 2021 forecasts, management noted the continued high degree of volatility of the forecasts. Given the uncertainty that the volatility is indicative of and the inherent imprecision of a forecast accurately projecting economic statistics during these unprecedented times, management elected to base its March 31, 2021 computation of the allowance for credit losses primarily on an alternative, more negative forecast, that management judged to more appropriately reflect the inherent risks to its loan portfolio. This more negative forecast's projections were materially consistent with the adoption-date forecast's projections under the baseline scenario. Management has also evaluated the appropriateness of the reasonable and supportable forecast scenarios utilized for each period and has made adjustments as needed. For the contractual term that extends beyond the reasonable and supportable forecast period, the Company reverts to the long term mean of historical factors over twelve quarters using a straight-line approach. The Company generally utilizes a four-quarter forecast and a twelve-quarter reversion period to the long-term average, which is then held static for the remainder of the forecast period. Included in its systematic methodology to determine its ACL, Management considers the need to qualitatively adjust expected credit losses for information not already captured in the loss estimation process. These qualitative adjustments either increase or decrease the quantitative model estimation (i.e., formulaic model results). Each period the Company considers qualitative factors that are relevant within the qualitative framework that includes the following: 1) changes in lending policies, procedures, and strategies, 2) changes in the nature and volume of the portfolio, 3) staff experience, 4) changes in volume and trends in classified loans, delinquencies and nonaccrual loans, 5) concentration risk, 6) trends in underlying collateral value, 7) external factors, including competition and legal and regulatory factors, 8) changes in the quality of the Company's loan review system, and 9) economic conditions not already captured. The Company has identified the following portfolio segments and calculates the allowance for credit losses for each using a discounted cash flow methodology at the loan level, with loss rates, prepayment assumptions and curtailment assumptions driven by each loan’s collateral type: Commercial, financial, and agricultural - Risks to this loan category include industry concentration and the inability to monitor the condition of the collateral which often consists of inventory, accounts receivable and other non-real estate assets. Equipment and inventory obsolescence can also pose a risk. Declines in general economic conditions and other events can cause cash flows to fall to levels insufficient to service debt. Also included in this category for periods subsequent to March 31, 2020 are PPP loans, which are fully guaranteed by the SBA and thus have minimal risk. Real estate - construction, land development, & other land loans - Risks common to commercial construction loans are cost overruns, changes in market demand for property, inadequate long-term financing arrangements and declines in real estate values. Residential construction loans are susceptible to those same risks as well as those associated with residential mortgage loans (see below). Changes in market demand for property could lead to longer marketing times resulting in higher carrying costs, declining values, and higher interest rates. Real estate - mortgage - residential (1-4 family) first - Residential mortgage loans are susceptible to weakening general economic conditions and increases in unemployment rates and declining real estate values. Real estate - mortgage - home equity loans / lines of credit - Risks common to home equity loans and lines of credit are general economic conditions, including an increase in unemployment rates, and declining real estate values which reduce or eliminate the borrower’s home equity. Real estate - mortgage - commercial and other - Loans in this category are susceptible to declines in occupancy rates, business failure and general economic conditions. Also, declines in real estate values and lack of suitable alternative use for the properties are risks for loans in this category. Consumer loans - Risks common to these loans include regulatory risks, unemployment and changes in local economic conditions as well as the inability to monitor collateral consisting of personal property. When management determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. When the discounted cash flow method is used to determine the allowance for credit losses, management adjusts the effective interest rate used to discount expected cash flows to incorporate expected prepayments. Determining the Contractual Term - Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. Troubled Debt Restructurings (TDRs) - A loan for which the terms have been modified resulting in a more than insignificant concession, and for which the borrower is experiencing financial difficulties, is generally considered to be a TDR. The allowance for credit loss on a TDR is measured using the same method as all other loans held for investment, except that the original interest rate is used to discount the expected cash flows, not the rate specified within the restructuring. Allowance for Credit Losses - Unfunded Loan Commitments - Effective with the adoption of CECL, the Company estimates expected credit losses on commitments to extend credit over the contractual period in which the Company is exposed to credit risk on the underlying commitments, unless the obligation is unconditionally cancelable by the Company. The allowance for off-balance sheet credit exposures, which is reflected within "Other Liabilities," is adjusted for as an increase or decrease to the provision for credit losses. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. The allowance is calculated using the same aggregate reserve rates calculated for the funded portion of loans at the portfolio level applied to the amount of commitments expected to fund.

On January 1, 2021, the Company adopted Accounting Standards Codification ("ASC") 326 ("CECL"), which replaced the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held to maturity debt securities. It also applies to off-balance sheet credit exposures, such as unfunded commitments to extend credit. In addition, CECL made changes to the accounting for available for sale debt securities. One such change is to require credit losses to be presented as an allowance rather than as a write-down on available for sale debt securities if management does not intend to sell and does not believe that it is more likely than not they will be required to sell.

January 1, 2021 are presented under CECL while prior period amounts continue to be reported in accordance with previously applicable accounting standards (“Incurred Loss”). The transition adjustment of the adoption of CECL included an increase in the allowance for credit losses on loans of $14.6 million, which is presented as a reduction to loans outstanding, and an increase in the allowance for credit losses on unfunded loan commitments of $7.5 million, which is recorded within Other Liabilities. The adoption of CECL had an insignificant impact on the Company's held to maturity and available for sale securities portfolios. The Company recorded a net decrease to retained earnings of $17.1 million as of January 1, 2021 for the cumulative effect of adopting CECL, which reflects the transition adjustments noted above, net of the applicable deferred tax assets recorded. Federal banking regulatory agencies provided optional relief to delay the adverse regulatory capital impact of CECL at adoption. The Company did not elect the option.

The Company adopted CECL using the prospective transition approach for PCD assets that were previously classified as PCI under ASC 310-30. In accordance with the standard, management did not reassess whether PCI assets met the criteria of PCD assets as of the date of adoption. The amortized cost basis of the PCD assets was adjusted to reflect the addition of $0.1 million of the allowance for credit losses. The remaining noncredit discount (based on the adjusted amortized cost basis) will be accreted into interest income at a rate that approximates the effective interest rate as of January 1, 2021.

With regard to PCD assets, because the Company elected to disaggregate the former PCI pools and no longer considers these pools to be the unit of account, contractually delinquent PCD loans will be reported as nonaccrual loans using the same criteria as other loans. Similarly, although management did not reassess whether modifications to individual acquired financial assets accounted for in pools were TDRs as of the date of adoption, PCD loans that are restructured and meet the definition of troubled debt restructurings after the adoption of CECL will be reported as such.

Accrued interest for all financial instruments is included in a separate line on the face of the Consolidated Balance Sheets. The Company elected not to measure an allowance for credit losses for accrued interest receivable and instead elected to reverse interest income on loans or securities that are placed on nonaccrual status, which is generally when the instrument is 90 days past due, or earlier if the Company believes the collection of interest is doubtful. The Company has concluded that this policy results in the timely reversal of uncollectable interest.

The allowance for credit losses for the majority of loans was calculated using a discounted cash flow methodology applied at a loan level with a one-year reasonable and supportable forecast period and a three-year straight-line reversion period. The Company elected to use, as a practical expedient, the fair value of collateral when determining the allowance for credit losses on loans for which repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty (collateral-dependent loans).

In August 2018, the FASB amended the Compensation - Retirement Benefits – Defined Benefit Plans Topic of the Accounting Standards Codification to improve disclosure requirements for employers that sponsor defined benefit pension and other postretirement plans. The guidance removed disclosures that were no longer considered cost-beneficial, clarified the specific requirements of disclosures, and added disclosure requirements identified as relevant. The amendments were effective for the Company on January 1, 2021 and the adoption of this amendment did not have a material effect on its financial statements.

Securities - Debt securities that the Company has the positive intent and ability to hold to maturity are classified as “held to maturity” and carried at amortized cost. Debt securities not classified as held to maturity are classified as “available for sale” and carried at fair value, with unrealized holding gains and losses being reported as other comprehensive income or loss and reported as a separate component of shareholders’ equity.

Interest income includes amortization or purchase premiums or discounts. Premiums and discounts are generally amortized into income on a level yield basis, with premiums being amortized to the earliest call date and discounts being accreted to the stated maturity date. Gains and losses on sales of securities are recognized at the time of sale based upon the specific identification method.

The estimate of expected credit losses is primarily based on the ratings assigned to the securities by debt rating agencies and the average of the annual historical loss rates associated with those ratings. The Company then multiplies those loss rates, as adjusted for any modifications to reflect current conditions and reasonable and supportable forecasts as considered necessary, by the remaining lives of each individual security to arrive at a lifetime expected loss amount.

Virtually all of the mortgage-backed securities held by the Company are issued by government-sponsored corporations. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The state and local governments securities held by the Company are highly rating by major rating agencies. As a result, the allowance for credit losses on held to maturity securities was immaterial at March 31, 2021.

Allowance for Credit Losses - Securities Available for Sale - For available for sale debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or if it is more likely than not that it will be required to sell the security before recovery of the amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security's amortized cost basis is written down to fair value through income with the establishment of an allowance under CECL compared to a direct write down of the security under Incurred Loss. For debt securities available for sale that do not meet the aforementioned criteria, the Company evaluates whether any decline in fair value is due to credit loss factors. In making this assessment, management considers any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income.

Changes in the allowance for credit losses under CECL are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the allowance when management believes the uncollectibility of an available-for-sale security is confirmed or when either of the criteria regarding intent or requirement to sell is met. At March 31, 2021, there was no allowance for credit losses related to the available-for-sale portfolio.

Loans - Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts and deferred fees and costs. Accrued interest receivable related to loans totaled $14.2 million at March 31, 2021 and was reported in accrued interest receivable on the consolidated balance sheets. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized in interest income using methods that approximate a level yield without anticipating prepayments.

The accrual of interest is generally discontinued when a loan becomes 90 days past due and is not well collateralized and in the process of collection, or when management believes, after considering economic and business conditions and collection efforts, that the principal or interest will not be collectible in the normal course of business. Past due status is based on contractual terms of the loan. A loan is considered to be past due when a scheduled payment has not been received 30 days after the contractual due date.

In future acquisitions, the Company may purchase loans, some of which have experienced more than insignificant credit deterioration since origination. In those cases, the Company will consider internal loan grades, delinquency status and other relevant factors in assessing whether purchased loans are PCD. PCD loans are recorded at the amount paid. An initial allowance for credit losses is determined using the same methodology as other loans held for investment, but with no impact to earnings. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan's purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent to initial recognition, PCD loans are subject to the same interest income recognition and impairment model as non-PCD loans, with changes to the allowance for loan losses recorded through provision expense.

Allowance for Credit Losses - Loans - The allowance for credit losses is a valuation account that is deducted from the loans' amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a loan balance is confirmed. Estimated recoveries are considered for post-CECL adoption date charge-offs to the extend that they do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Accrued interest receivable is excluded from the estimate of credit losses.

The allowance for credit losses is measured on a collective pool basis when similar risk characteristics exist. Loans with similar risk characteristics are grouped into homogenous segments, or pools, for analysis. The Discounted Cash Flow (“DCF”) method is utilized for substantially all pools, with discounted cash flows computed for each loan in a pool based on its individual characteristics (e.g. maturity date, payment amount, interest rate, etc.), and the results are aggregated at the pool level. A probability of default and loss given default, as adjusted for recoveries (as noted above), are applied to the discounted cash flows for each pool, while considering prepayment and principal curtailment effects. The analysis produces a discounted expected cash flow total for each pool, which is then compared to the amortized cost of the pool to arrive at the expected credit loss.

In determining the proper level of default rates and loss given default, management has determined that the loss experience of the Company provides the best basis for its assessment of expected credit losses. It therefore utilized its own historical credit loss experience by each loan segment over an economic cycle, while excluding loss experience from certain acquired institutions (i.e., failed banks).

Management considers forward-looking information in estimating expected credit losses. For substantially all segments of collectively evaluated loans, the Company incorporates two or more macroeconomic drivers using a statistical regression modeling methodology. The Company subscribes to a third-party service which provides a quarterly macroeconomic baseline outlook and alternative scenarios for the United States economy. The baseline, along with the evaluation of alternative scenarios, is evaluated by management to determine the best estimate within the range of expected credit losses. The baseline forecast incorporates an equal probability of the United States economy performing better or worse than this projection. With the ongoing pandemic, along with periodic starts and stops to reopening the economy and the impact of government stimulus, the baseline and alternative scenarios have reflected a high degree of volatility in economic forecasts from month-to-month. The Company based it's adoption date allowance for credit loss adjustment primarily on the baseline forecast, which reflected ongoing threats to the economy, primarily arising from the pandemic. In reviewing the March 2021 forecasts, management noted the continued high degree of volatility of the forecasts. Given the uncertainty that the volatility is indicative of and the inherent imprecision of a forecast accurately projecting economic statistics during these unprecedented times, management elected to base its March 31, 2021 computation of the allowance for credit losses primarily on an alternative, more negative forecast, that management judged to more appropriately reflect the inherent risks to its loan portfolio. This more negative forecast's projections were materially consistent with the adoption-date forecast's projections under the baseline scenario.

Management has also evaluated the appropriateness of the reasonable and supportable forecast scenarios utilized for each period and has made adjustments as needed. For the contractual term that extends beyond the reasonable and supportable forecast period, the Company reverts to the long term mean of historical factors over twelve quarters using a straight-line approach. The Company generally utilizes a four-quarter forecast and a twelve-quarter reversion period to the long-term average, which is then held static for the remainder of the forecast period.

Included in its systematic methodology to determine its ACL, Management considers the need to qualitatively adjust expected credit losses for information not already captured in the loss estimation process. These qualitative adjustments either increase or decrease the quantitative model estimation (i.e., formulaic model results). Each period the Company considers qualitative factors that are relevant within the qualitative framework that includes the following: 1) changes in lending policies, procedures, and strategies, 2) changes in the nature and volume of the portfolio, 3) staff experience, 4) changes in volume and trends in classified loans, delinquencies and nonaccrual loans, 5) concentration risk, 6) trends in underlying collateral value, 7) external factors, including competition and legal and regulatory factors, 8) changes in the quality of the Company's loan review system, and 9) economic conditions not already captured.

Commercial, financial, and agricultural - Risks to this loan category include industry concentration and the inability to monitor the condition of the collateral which often consists of inventory, accounts receivable and other non-real estate assets. Equipment and inventory obsolescence can also pose a risk. Declines in general economic conditions and other events can cause cash flows to fall to levels insufficient to service debt. Also included in this category for periods subsequent to March 31, 2020 are PPP loans, which are fully guaranteed by the SBA and thus have minimal risk.

Real estate - construction, land development, & other land loans - Risks common to commercial construction loans are cost overruns, changes in market demand for property, inadequate long-term financing arrangements and declines in real estate values. Residential construction loans are susceptible to those same risks as well as those associated with residential mortgage loans (see below). Changes in market demand for property could lead to longer marketing times resulting in higher carrying costs, declining values, and higher interest rates.

When management determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate.

Determining the Contractual Term - Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or

Troubled Debt Restructurings (TDRs) - A loan for which the terms have been modified resulting in a more than insignificant concession, and for which the borrower is experiencing financial difficulties, is generally considered to be a TDR. The allowance for credit loss on a TDR is measured using the same method as all other loans held for investment, except that the original interest rate is used to discount the expected cash flows, not the rate specified within the restructuring.

Allowance for Credit Losses - Unfunded Loan Commitments - Effective with the adoption of CECL, the Company estimates expected credit losses on commitments to extend credit over the contractual period in which the Company is exposed to credit risk on the underlying commitments, unless the obligation is unconditionally cancelable by the Company. The allowance for off-balance sheet credit exposures, which is reflected within "Other Liabilities," is adjusted for as an increase or decrease to the provision for credit losses. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. The allowance is calculated using the same aggregate reserve rates calculated for the funded portion of loans at the portfolio level applied to the amount of commitments expected to fund.