Basis of Presentation	3 Months Ended
Mar. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The consolidated financial statements include the accounts of Hancock Whitney Corporation and all other entities in which it has a controlling interest (the “Company”). The financial statements include all adjustments that are, in the opinion of management, necessary to fairly state the Company’s financial condition, results of operations, changes in stockholders’ equity and cash flows for the interim periods presented. The Company has also evaluated all subsequent events for potential recognition and disclosure through the date of the filing of this Quarterly Report on Form 10-Q. Some financial information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) have been condensed or omitted in this Quarterly Report on Form 10-Q pursuant to Securities and Exchange Commission rules and regulations. These financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. Financial information reported in these financial statements is not necessarily indicative of the Company’s financial condition, results of operations, or cash flows for any other interim or annual period. Certain prior period amounts have been reclassified to conform to the current period presentation. These changes in presentation did not have a material impact on the Company’s financial condition or operating results. Use of Estimates The accounting principles the Company follows and the methods for applying these principles conform to GAAP and general practices followed by the banking industry. These accounting principles require management to make estimates and assumptions about future events that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from those estimates. Critical Accounting Policies and Estimates On January 1, 2020, the Company adopted Accounting Standards Codification (“ASC”) 326, “Financial Instruments – Credit Losses,” more commonly referred to as CECL, on a modified retrospective basis. The provisions of this guidance require a material change to the manner in which the Company estimates and reports losses on financial instruments, including loans and unfunded lending commitments, select securities and other assets carried at amortized cost. Results for reporting periods beginning after January 1, 2020 are presented under ASC 326, while prior period amounts continue to be reported in accordance with previously applicable GAAP. Changes to the Company’s accounting policies related to CECL are described below. There were no other material changes or developments during the reporting period with respect to methodologies that the Company uses when applying what management believes are critical accounting policies and developing critical accounting estimates as disclosed in its Annual Report on Form 10-K for the year ended December 31, 2019. Refer to Note 15 – Recent Accounting Pronouncements for a discussion of accounting standards adopted during the three months ended March 31, 2020 and the impact to the Company’s financial statements. Accounting Policy Updates Allowance for Credit Losses on Loans, Leases Held for Investment and Unfunded Exposures For reporting periods beginning on or after January 1, 2020, the Allowance for Credit Losses (ACL) is comprised of the Allowance for Loan and Lease Losses (ALLL), a valuation account available to absorb losses on loans and leases held for investment, and the Reserve for Unfunded Lending Commitments, a liability established to absorb credit losses for the expected life of the contractual term of on and off-balance sheet exposures as of the date of the determination. Quarterly, management estimates losses in the portfolio and unfunded exposures based on a number of factors, including the Company’s past loan loss experience, known and potential risks in the portfolio, adverse situations that may affect the borrowers’ ability to repay, the estimated value of any underlying collateral, and current and forecasted economic conditions. The analysis and methodology for estimating the ACL includes two primary elements: a collective approach for pools of loans that have similar risk characteristics using a loss rate analysis, and a specific reserve analysis for credits individually evaluated for credit loss. For the collective approach, the Company segments loans into commercial non-real estate, commercial real estate – owner occupied, commercial real estate – income producing, construction and land development, residential mortgage and consumer, with further segmentation by region and sub-portfolio, as deemed appropriate. Both quantitative and qualitative factors are applied at the portfolio segment levels. The Company applies the practical expedient that permits the exclusion of the accrued interest receivable balance from amortized cost basis of financing receivables. For the collectively evaluated portfolios, the Company utilizes internally developed credit models and third party economic forecasts for the calculation of the reasonable and supportable forecast period for the majority of the portfolio and other methods, generally historical loss based, for select portfolios. The Company calculates collective allowance for a two-year reasonable and supportable forecast period utilizing the weighted average of multiple macroeconomic scenarios, and then reverts on a linear basis over four quarters to an average historical loss rate for the remaining life. The credit models consist primarily of multivariate regression and autoregressive models that correlate our historical net charge-off rates to select macroeconomic variables at a collective level. Forward-looking macroeconomic forecasts are applied as inputs to the regression equations to estimate quarterly collective net charge-off rates over the reasonable and supportable period. The net charge-off rates from the credit models for the reasonable and supportable period, the linear reversion rates, and the average loss rates for the post reasonable and supportable periods are applied to forecasted balance runoff for the estimated remaining term. The balance runoff incorporates prepayment assumptions developed from historical experience that are applied to the multiple macroeconomic forecasts. Forecasted net charge-off rates are also applied to forecasted draws and subsequent runoff of unfunded commitments in the calculation of the reserve for unfunded lending commitments. Qualitative adjustments to the output of quantitative calculations are made when management deems it necessary to reflect differences in current and forecasted conditions as compared to those during the historical loss period used in model development. Conditions to be considered include, but are not limited to, problem loan trends, current business and economic conditions, credit concentrations, lending policies and procedures, lending staff, collateral values, loan profiles and volumes, loan review quality, changes in competition and regulations, and other adjustments for model limitations or other variables not specifically captured. The Company establishes specific reserves using an individually evaluated approach for nonaccrual loans, loans modified in troubled debt restructures, loans for which a troubled debt restructure is reasonably expected, and other financial instruments that are deemed to not share risk characteristics with other collectively evaluated financial assets. For loans individually evaluated, a specific allowance is recognized for any shortfall between the loan’s value and its recorded investment. The loan’s value is measured by either the loan’s observable market price, the fair value of the collateral of the loan (less liquidation costs) if it is collateral dependent, or by the present value of expected future cash flows discounted at the loan’s effective interest rate. The Company applies the practical expedient and defines collateral dependent loans as those where the borrower is experiencing financial difficulty and on which repayment is expected to be provided substantially through the operation or sale of the collateral. Loans individually analyzed are not incorporated into the pool analysis to avoid double counting. The Company limits the individually evaluated specific reserve analysis to include commercial and residential mortgage loans with relationship balances of $1 million or greater and all loans classified as troubled debt restructurings. Acquired Loans and Other Financial Assets Acquired loans and other financial assets within the scope of CECL are segregated between those purchased with credit deterioration (“PCD”) and those that are not (“non PCD”). Assets considered PCD include those individual financial assets (or groups of financial assets with similar risk characteristics) that as of the date of acquisition are assessed as having experienced a more-than-insignificant deterioration in credit quality since origination. The assessment of what is more-than-insignificant credit deterioration since origination considers information including, but not limited to, financial assets that are delinquent, on nonaccrual and/or otherwise adversely risk rated as of the acquisition date, those that have been downgraded since origination, and those for which, after origination, credit spreads have widened beyond the threshold specified in policy. The Company bifurcates the fair value discount between the credit and noncredit components and records an allowance for credit losses for PCD assets by adding the credit portion of the fair value discount to the initial amortized cost basis and increasing the allowance for credit losses at the date of acquisition. Any noncredit discount or premium resulting from acquiring assets with credit deterioration is allocated to each individual asset. All non PCD financial assets acquired are recorded at the loans estimated fair value at acquisition, with the estimated allowance for credit loss recorded as a provision for credit losses through earnings in the period in which the acquisition has occurred. The noncredit discount or premium for PCD assets and full discount for non PCD assets will be accreted to interest income using the interest method based on the effective interest rate at the acquisition date. Under the transition provisions for prospective application of CECL, the Company has classified all purchased credit impaired loans (“PCI”) previously accounted for under Financial Accounting Standard Subtopic 310-30 to be classified as PCD, without reassessing whether the financial assets meet the criteria of PCD as of the date of adoption. The prospective application resulted in an adjustment to the amortized cost basis of the financial asset to reflect the addition of the allowance for credit losses at the date of adoption. The Company elected not to maintain pools of loans accounted for under Subtopic 310-30 at adoption. The Company was also not required to reassess whether modifications to individual acquired financial assets accounted for in pools were troubled debt restructurings as of the date of adoption. The noncredit discount, after the adjustment for the allowance for credit losses, will be accreted to interest income using the interest method based on the effective interest rate determined after the adjustment for credit losses at the adoption date. Allowance for Credit Losses on Securities The CECL standard also requires an assessment of the Company’s held to maturity debt securities for expected credit losses and the available for sale debt securities for credit-related impairment. The Company applies the practical expedient to exclude the accrued interest receivable balance from amortized cost basis of financing receivables. The allowance for credit losses on held to maturity debt securities is estimated at the individual security level when there is a more than inconsequential risk of default. The assessment uses probability of default and loss given default models based on public ratings, where available, or mapped internally developed risk grades to public ratings and forecasted cash flows using the same economic forecasts and probability weighting as used for the Company’s evaluation of the loan portfolio. Qualitative adjustments to the output of the quantitative calculation are made when management deems it necessary to reflect differences in current and forecasted conditions as compared to those during the historical loss period used in model development. The Company evaluates credit impairment on available for sale debt securities at an individual security level. This evaluation is done for securities whose fair value is below amortized cost with a more than inconsequential risk of default and where the Company has assessed the decline in fair value is significant enough to suggest a credit event occurred. Credit events are generally assessed based on adverse conditions specifically related to the security, an industry, or geographic area, changes in the financial condition of the issuer of the security, or in the case of an asset-backed debt security, changes in the financial condition of the underlying loan obligors. The allowance for credit losses for such securities is measured using a discounted cash flow methodology, through which management compares the present value of expected cash flows with the amortized cost basis of the security. The allowance for credit loss is limited to the amount by which the fair value is less than the amortized cost basis. The Company reassess the credit losses at each reporting period and records subsequent changes in the allowance for credit losses on securities with a corresponding adjustment recorded in the provision for credit loss expense. If the Company intends to sell the debt security, or more likely than not will be required to sell the security before recovery of its amortized cost basis, the security is charged down to fair value against the allowance for credit losses, with any incremental impairment reported in earnings.

Basis of Presentation

3 Months Ended

Mar. 31, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

1. Basis of Presentation

The consolidated financial statements include the accounts of Hancock Whitney Corporation and all other entities in which it has a controlling interest (the “Company”). The financial statements include all adjustments that are, in the opinion of management, necessary to fairly state the Company’s financial condition, results of operations, changes in stockholders’ equity and cash flows for the interim periods presented. The Company has also evaluated all subsequent events for potential recognition and disclosure through the date of the filing of this Quarterly Report on Form 10-Q. Some financial information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the U.S. (“GAAP”) have been condensed or omitted in this Quarterly Report on Form 10-Q pursuant to Securities and Exchange Commission rules and regulations. These financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. Financial information reported in these financial statements is not necessarily indicative of the Company’s financial condition, results of operations, or cash flows for any other interim or annual period.

Certain prior period amounts have been reclassified to conform to the current period presentation. These changes in presentation did not have a material impact on the Company’s financial condition or operating results.

Use of Estimates

The accounting principles the Company follows and the methods for applying these principles conform to GAAP and general practices followed by the banking industry. These accounting principles require management to make estimates and assumptions about future events that affect the amounts reported in the consolidated financial statements and the accompanying notes. Actual results could differ from those estimates.

Critical Accounting Policies and Estimates

On January 1, 2020, the Company adopted Accounting Standards Codification (“ASC”) 326, “Financial Instruments – Credit Losses,” more commonly referred to as CECL, on a modified retrospective basis. The provisions of this guidance require a material change to the manner in which the Company estimates and reports losses on financial instruments, including loans and unfunded lending commitments, select securities and other assets carried at amortized cost. Results for reporting periods beginning after January 1, 2020 are presented under ASC 326, while prior period amounts continue to be reported in accordance with previously applicable GAAP. Changes to the Company’s accounting policies related to CECL are described below. There were no other material changes or developments during the reporting period with respect to methodologies that the Company uses when applying what management believes are critical accounting policies and developing critical accounting estimates as disclosed in its Annual Report on Form 10-K for the year ended December 31, 2019. Refer to Note 15 – Recent Accounting Pronouncements for a discussion of accounting standards adopted during the three months ended March 31, 2020 and the impact to the Company’s financial statements.

Accounting Policy Updates

Allowance for Credit Losses on Loans, Leases Held for Investment and Unfunded Exposures

For reporting periods beginning on or after January 1, 2020, the Allowance for Credit Losses (ACL) is comprised of the Allowance for Loan and Lease Losses (ALLL), a valuation account available to absorb losses on loans and leases held for investment, and the Reserve for Unfunded Lending Commitments, a liability established to absorb credit losses for the expected life of the contractual term of on and off-balance sheet exposures as of the date of the determination. Quarterly, management estimates losses in the portfolio and unfunded exposures based on a number of factors, including the Company’s past loan loss experience, known and potential risks in the portfolio, adverse situations that may affect the borrowers’ ability to repay, the estimated value of any underlying collateral, and current and forecasted economic conditions.

The analysis and methodology for estimating the ACL includes two primary elements: a collective approach for pools of loans that have similar risk characteristics using a loss rate analysis, and a specific reserve analysis for credits individually evaluated for credit loss. For the collective approach, the Company segments loans into commercial non-real estate, commercial real estate – owner occupied, commercial real estate – income producing, construction and land development, residential mortgage and consumer, with further segmentation by region and sub-portfolio, as deemed appropriate. Both quantitative and qualitative factors are applied at the portfolio segment levels. The Company applies the practical expedient that permits the exclusion of the accrued interest receivable balance from amortized cost basis of financing receivables.

For the collectively evaluated portfolios, the Company utilizes internally developed credit models and third party economic forecasts for the calculation of the reasonable and supportable forecast period for the majority of the portfolio and other methods, generally

historical loss based, for select portfolios. The Company calculates collective allowance for a two-year reasonable and supportable forecast period utilizing the weighted average of multiple macroeconomic scenarios, and then reverts on a linear basis over four quarters to an average historical loss rate for the remaining life. The credit models consist primarily of multivariate regression and autoregressive models that correlate our historical net charge-off rates to select macroeconomic variables at a collective level. Forward-looking macroeconomic forecasts are applied as inputs to the regression equations to estimate quarterly collective net charge-off rates over the reasonable and supportable period. The net charge-off rates from the credit models for the reasonable and supportable period, the linear reversion rates, and the average loss rates for the post reasonable and supportable periods are applied to forecasted balance runoff for the estimated remaining term. The balance runoff incorporates prepayment assumptions developed from historical experience that are applied to the multiple macroeconomic forecasts. Forecasted net charge-off rates are also applied to forecasted draws and subsequent runoff of unfunded commitments in the calculation of the reserve for unfunded lending commitments. Qualitative adjustments to the output of quantitative calculations are made when management deems it necessary to reflect differences in current and forecasted conditions as compared to those during the historical loss period used in model development. Conditions to be considered include, but are not limited to, problem loan trends, current business and economic conditions, credit concentrations, lending policies and procedures, lending staff, collateral values, loan profiles and volumes, loan review quality, changes in competition and regulations, and other adjustments for model limitations or other variables not specifically captured.

The Company establishes specific reserves using an individually evaluated approach for nonaccrual loans, loans modified in troubled debt restructures, loans for which a troubled debt restructure is reasonably expected, and other financial instruments that are deemed to not share risk characteristics with other collectively evaluated financial assets. For loans individually evaluated, a specific allowance is recognized for any shortfall between the loan’s value and its recorded investment. The loan’s value is measured by either the loan’s observable market price, the fair value of the collateral of the loan (less liquidation costs) if it is collateral dependent, or by the present value of expected future cash flows discounted at the loan’s effective interest rate. The Company applies the practical expedient and defines collateral dependent loans as those where the borrower is experiencing financial difficulty and on which repayment is expected to be provided substantially through the operation or sale of the collateral. Loans individually analyzed are not incorporated into the pool analysis to avoid double counting. The Company limits the individually evaluated specific reserve analysis to include commercial and residential mortgage loans with relationship balances of $1 million or greater and all loans classified as troubled debt restructurings.

Acquired Loans and Other Financial Assets

Acquired loans and other financial assets within the scope of CECL are segregated between those purchased with credit deterioration (“PCD”) and those that are not (“non PCD”). Assets considered PCD include those individual financial assets (or groups of financial assets with similar risk characteristics) that as of the date of acquisition are assessed as having experienced a more-than-insignificant deterioration in credit quality since origination. The assessment of what is more-than-insignificant credit deterioration since origination considers information including, but not limited to, financial assets that are delinquent, on nonaccrual and/or otherwise adversely risk rated as of the acquisition date, those that have been downgraded since origination, and those for which, after origination, credit spreads have widened beyond the threshold specified in policy. The Company bifurcates the fair value discount between the credit and noncredit components and records an allowance for credit losses for PCD assets by adding the credit portion of the fair value discount to the initial amortized cost basis and increasing the allowance for credit losses at the date of acquisition. Any noncredit discount or premium resulting from acquiring assets with credit deterioration is allocated to each individual asset. All non PCD financial assets acquired are recorded at the loans estimated fair value at acquisition, with the estimated allowance for credit loss recorded as a provision for credit losses through earnings in the period in which the acquisition has occurred. The noncredit discount or premium for PCD assets and full discount for non PCD assets will be accreted to interest income using the interest method based on the effective interest rate at the acquisition date.

Under the transition provisions for prospective application of CECL, the Company has classified all purchased credit impaired loans (“PCI”) previously accounted for under Financial Accounting Standard Subtopic 310-30 to be classified as PCD, without reassessing whether the financial assets meet the criteria of PCD as of the date of adoption. The prospective application resulted in an adjustment to the amortized cost basis of the financial asset to reflect the addition of the allowance for credit losses at the date of adoption. The Company elected not to maintain pools of loans accounted for under Subtopic 310-30 at adoption. The Company was also not required to reassess whether modifications to individual acquired financial assets accounted for in pools were troubled debt restructurings as of the date of adoption. The noncredit discount, after the adjustment for the allowance for credit losses, will be accreted to interest income using the interest method based on the effective interest rate determined after the adjustment for credit losses at the adoption date.

Allowance for Credit Losses on Securities

The CECL standard also requires an assessment of the Company’s held to maturity debt securities for expected credit losses and the available for sale debt securities for credit-related impairment. The Company applies the practical expedient to exclude the accrued interest receivable balance from amortized cost basis of financing receivables. The allowance for credit losses on held to maturity debt securities is estimated at the individual security level when there is a more than inconsequential risk of default. The assessment uses probability of default and loss given default models based on public ratings, where available, or mapped internally developed risk grades to public ratings and forecasted cash flows using the same economic forecasts and probability weighting as used for the

Company’s evaluation of the loan portfolio. Qualitative adjustments to the output of the quantitative calculation are made when management deems it necessary to reflect differences in current and forecasted conditions as compared to those during the historical loss period used in model development. The Company evaluates credit impairment on available for sale debt securities at an individual security level. This evaluation is done for securities whose fair value is below amortized cost with a more than inconsequential risk of default and where the Company has assessed the decline in fair value is significant enough to suggest a credit event occurred. Credit events are generally assessed based on adverse conditions specifically related to the security, an industry, or geographic area, changes in the financial condition of the issuer of the security, or in the case of an asset-backed debt security, changes in the financial condition of the underlying loan obligors. The allowance for credit losses for such securities is measured using a discounted cash flow methodology, through which management compares the present value of expected cash flows with the amortized cost basis of the security. The allowance for credit loss is limited to the amount by which the fair value is less than the amortized cost basis.

The Company reassess the credit losses at each reporting period and records subsequent changes in the allowance for credit losses on securities with a corresponding adjustment recorded in the provision for credit loss expense. If the Company intends to sell the debt security, or more likely than not will be required to sell the security before recovery of its amortized cost basis, the security is charged down to fair value against the allowance for credit losses, with any incremental impairment reported in earnings.