Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SIGNIFICANT ACCOUNTING POLICIES Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents include cash, cash in non-owned ATMs, amounts due from banks, federal funds sold and securities purchased under agreements to resell. Debt Securities Investments in debt securities are classified into one of the following three categories and accounted for as follows: •Securities purchased with the intent of selling them in the near future are classified as “trading” and reported at fair value, with unrealized gains and losses included in earnings. •Securities purchased with the positive intent and ability to hold to maturity are classified as “held to maturity” and reported at amortized cost. •Securities not classified as either trading or held to maturity are classified as “available-for-sale” and reported at fair value, with unrealized gains and losses excluded from earnings and reported, net of tax, as a separate component of stockholders’ equity in accumulated other comprehensive income (loss). Realized gains and losses on sales of investment and mortgage-backed securities (MBS) are determined using the specific identification method. All sales are made without recourse. Debt securities mostly include MBS, municipal bonds, and U.S. government and agency securities. The fair value of debt securities is primarily obtained from third-party pricing services. Implicit in the valuation of MBS are estimated prepayments based on historical and current market conditions. Premiums and discounts on MBS collateralized by residential 1-4 family loans are recognized in interest income using a level yield method over the period to expected maturity. Premiums and discounts on all other securities are recognized on a straight line basis over the period to expected maturity, with the exception of premiums on callable debt securities, which are recognized over the period to the earliest call date. We follow Accounting Standards Codification (ASC) 320-10, Investments - Debt Securities which provides guidance related to the recognition of and expanded disclosure requirements for other-than-temporary impaired (OTTI) debt securities. We are required to use our judgment in determining impairment in certain circumstances. When we conclude an investment security is other than temporarily impaired, and we intend to sell the debt security or it is more likely than not that we will be required to sell it before recovery, an OTTI write-down is recognized as a reduction to noninterest income in the Consolidated Statements of Income, equal to the entire difference between the security’s amortized cost basis and its fair value. If we do not intend to sell the investment security and conclude that it is not more likely than not we will be required to sell the security before recovering the carrying value, which may be maturity, the OTTI charge is separated into a “credit” and “other” component. The “credit” component of OTTI is included as a reduction to earnings and the “other” component of OTTI is included in other comprehensive income (loss), net of tax. For additional detail regarding debt securities, see Note 6. Equity Securities Investments in equity securities are recorded in accordance with ASC 321-10, Investments - Equity Securities, and are classified into one of the following two categories and accounted for as follows: •Securities with a readily determinable fair value are reported at fair value, with unrealized gains and losses included in earnings. Any dividends received are recorded in interest income. •Securities without a readily determinable fair value are reported at cost less impairment, if any, plus or minus adjustments resulting from observable price changes in orderly transactions for the identical or similar investment of the same issuer. Any dividends received are recorded in interest income. Equity investments include our Visa Class B share holdings and certain other equity investments. The fair value of equity investments with readily determinable fair values is primarily obtained from third-party pricing services. For equity investments without readily determinable fair values, when an orderly transaction for the identical or similar investment of the same issuer is identified, we use valuation techniques permitted under ASC 820, Fair Value Measurement, to evaluate the observed transaction(s) and adjust the carrying value. ASC 321-10 also provides impairment accounting guidance for equity securities without readily determinable fair values. The qualitative assessment to determine whether impairment exists requires the use of our judgment. If, after completing the qualitative assessment, we conclude an equity investment without a readily determinable fair value is impaired, a loss for the difference between the equity investment’s carrying value and its fair value may be recognized as a reduction to noninterest income in the Consolidated Statements of Income. For additional detail regarding equity securities, see Note 6. Loans Loans are stated net of deferred fees and costs. Interest income on loans is recognized using the level yield method. Loan origination fees, commitment fees and direct loan origination costs are deferred and recognized over the life of the loans using a level yield method over the period to maturity. A loan is impaired when, based on current information and events, it is probable we will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impaired loans are measured in accordance with the provisions of ASC 310, Receivables, based on one of three methods: (i) the present value of expected future discounted cash flows at the loan’s effective interest rate, (ii) the loan’s observable market price, (iii) the fair value of the underlying collateral if the loan is collateral dependent. All loans restructured in a troubled debt restructuring are considered to be impaired. Our policy for recognition of interest income on impaired loans, excluding accruing loans, is the same as for nonaccrual loans discussed below. In addition to originating loans, we occasionally acquire loans through acquisitions or loan purchase transactions. Certain acquired loans may exhibit deteriorated credit quality that has occurred since origination and we may not expect to collect all contractual payments. We account for these purchased credit-impaired loans in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. The loans are initially recorded at fair value on the acquisition date, reflecting the present value of the cash flows expected to be collected. Income recognition on these loans is based on reasonable expectations on timing and amount of cash flows to be collected. Purchased credit impaired loans are evaluated for impairment on a quarterly basis with a complete updating of the estimated cash flows on a semi-annual basis. If a loan is determined to be impaired but considered collateral dependent, it will have no accretable yield. For additional detail regarding impaired loans, see Note 8. For additional detail regarding purchased credit-impaired loans, see Note 7. Past Due and Nonaccrual Loans Past due loans are defined as loans contractually past due 90 days or more as to principal or interest payments but which remain in accrual status because they are considered well secured and in the process of collection. Nonaccruing loans are those on which the accrual of interest has ceased. Loans are placed on nonaccrual status immediately if, in the opinion of management, collection is doubtful, or when principal or interest is past due 90 days or more and the loan is not well secured and in the process of collection. Interest accrued but not collected at the date a loan is placed on nonaccrual status is reversed and charged against interest income. In addition, the amortization of net deferred loan fees is suspended when a loan is placed on nonaccrual status. Subsequent cash receipts are applied either to the outstanding principal balance or recorded as interest income, depending on management’s assessment of the ultimate collectability of principal and interest. Loans are returned to an accrual status when we assess that the borrower has the ability to make all principal and interest payments in accordance with the terms of the loan (i.e. a consistent repayment record, generally six consecutive payments, has been demonstrated). For additional detail regarding past due and nonaccrual loans, see Note 8. Allowance for Loan and Lease Losses We maintain an allowance for loan and lease losses (allowance) which represents our best estimate of probable losses within our loan portfolio. As losses are realized, they are charged to the allowance. We establish our allowance in accordance with guidance provided in ASC 450, Contingencies, ASC 310, and the SEC’s Staff Accounting Bulletin 102, Selected Loan Loss Allowance Methodology and Documentation Issues (SAB 102). The allowance includes two primary components: (i) an allowance established on loans collectively evaluated for impairment (general allowance), and (ii) an allowance established on loans individually evaluated for impairment (specific allowance). In addition, we also maintain an allowance for acquired loans as necessary. The general allowance is calculated on a pooled loan basis using both quantitative and qualitative factors in accordance with ASC 450. The specific allowance is calculated on an individual loan basis when collectability of all contractually due principal and interest is no longer believed to be probable in accordance with ASC 310. Lastly, the allowance related to acquired loans is calculated when (i) there is deterioration in credit quality subsequent to acquisition for loans accounted for under ASC 310-30, and (ii) the inherent losses in the loans exceed the remaining total loan mark recorded at the time of acquisition for loans accounted for under ASC 310-20, Receivables - Nonrefundable Fees and Other Costs. Allowances for pooled homogeneous loans, that are not deemed impaired, are based on historical net loss experience. Estimated losses for pooled portfolios are determined differently for commercial loan pools and retail loan pools. Commercial loans are pooled as follows: commercial and industrial, owner-occupied commercial, commercial mortgages and construction. Each pool is further segmented by internally assessed risk ratings. Loan losses for commercial loans are estimated by determining the probability of default and expected loss severity upon default. The probability of default is calculated based on the historical rate of migration to impaired status during the last 36 quarters. During the year ended December 31, 2019, we increased the look-back period to 36 quarters from 32 quarters used at December 31, 2018. This increase in the look-back period allows us to continue to anchor to the fourth quarter of 2010 to ensure that the quantitative reserves calculated by the allowance for loan and lease loss model are adequately considering the losses within a full credit cycle. Loss severity upon default is calculated as the actual loan losses (net of recoveries) on impaired loans in their respective pool during the same time frame. Retail loans are pooled into the following segments: residential mortgage, consumer secured and consumer unsecured loans. Pooled reserves for retail loans are calculated based solely on average net loss rates over the same 36 quarter look-back period. Qualitative adjustment factors consider various current internal and external conditions which are allocated among loan types and take into consideration: •Current underwriting policies, staff, and portfolio mix, •Internal trends of delinquency, nonaccrual and criticized loans by segment, •Risk rating accuracy, control and regulatory assessments/environment, •General economic conditions - locally and nationally, •Market trends impacting collateral values, and •The competitive environment, as it could impact loan structure and underwriting. The above factors are based on their relative standing compared to the period in which historic losses are used in quantitative reserve estimates and current directional trends. Qualitative factors in our model can add to or subtract from quantitative reserves. The allowance methodology uses a loss emergence period (LEP), which is the period of time between an event that triggers the probability of a loss and the confirmation of the loss. We estimate the commercial LEP to be approximately nine quarters as of December 31, 2019. Our residential mortgage and consumer LEP remained at four quarters as of December 31, 2019. We evaluate LEP quarterly for reasonableness and complete a detailed historical analysis of our LEP annually for our commercial portfolio and review of the current four quarter LEP for the retail portfolio to determine the continued reasonableness of this assumption. Our loan officers and risk managers meet at least quarterly to discuss and review the conditions and risks associated with individual problem loans. In addition, various regulatory agencies periodically review our loan ratings and allowance for loan and lease losses and the Bank’s internal loan review department performs loan reviews. For impaired loans, if the measure is less than the recorded investment in the loan, a related allowance is allocated for the impairment. Impairment of troubled debt restructurings are measured at the present value of estimated future cash flows using the loan’s effective interest rate at inception or the fair value of the underlying collateral if the loan is collateral dependent. Troubled debt restructurings consist of concessions granted to borrowers facing financial difficulty. For additional detail regarding the allowance for loan and lease losses and the provision for loan and lease losses, see Note 8. Fair Value Option Mortgage loans held for sale are recorded at fair value on a loan level basis, using pricing information obtained from secondary markets and brokers and applied to loans with similar interest rates and maturities. Derivative financial instruments related to mortgage banking activities are recorded at fair value and are not designated as accounting hedges. This includes commitments to originate certain fixed-rate residential mortgage loans to customers, also referred to as interest rate lock commitments. We may also enter into forward sale commitments to sell loans to investors at a fixed price at a future date and trade asset-backed securities to mitigate interest rate risk. Other Real Estate Owned Upon initial receipt, other real estate owned (OREO) is recorded at the estimated fair value less costs to sell. Costs subsequently incurred to improve the assets are capitalized, provided that the resultant carrying value does not exceed the estimated fair value less costs to sell. Costs related to holding or disposing of the assets are charged to expense as incurred. We periodically evaluate OREO for impairment and write-down the value of the asset when declines in fair value below the carrying value are identified. Loan workout and OREO expenses include costs of holding and operating the assets, net gains or losses on sales of the assets and provisions for losses to reduce such assets to the estimated fair values less costs to sell. For additional detail regarding other real estate owned, see Note 8. Premises and Equipment Premises and equipment are stated at cost less accumulated depreciation and amortization. Costs of major replacements, improvements and additions are capitalized. Depreciation and amortization expense is computed on a straight-line basis over the estimated useful lives of the assets or, for leasehold improvements, over the terms of the related lease or effective useful lives of the assets, whichever is less. In general, computer equipment, furniture and equipment and building renovations are depreciated over three, five and ten years, respectively. Premises and equipment acquired in business combinations are initially recorded at fair value and subsequently carried at cost less accumulated depreciation and amortization. Assets to be disposed of are recorded at the lower of the carrying amount or fair value less costs to sell. For additional detail regarding premises and equipment, see Note 9. Goodwill and Intangible Assets We account for goodwill and intangible assets in accordance with ASC 805, Business Combinations and ASC 350, Intangibles-Goodwill and Other. Accounting for goodwill and other intangible assets requires the Company to make significant judgments, for goodwill particularly, with respect to estimating the fair value of each reporting unit and when required, estimating the fair value of net assets. The estimates utilize historical data, cash flows, and market and industry data specific to each reporting unit as well as projected data. Industry and market data are used to develop material assumptions such as transaction multiples, required rates of return, control premiums, transaction costs and synergies of a transaction, and capitalization. Goodwill is not amortized, rather it is subject to periodic impairment testing. We review goodwill for impairment annually on October 1 and more frequently if events and circumstances indicate that the fair value of a reporting unit is less than its carrying value. Other intangible assets with finite lives are amortized over their estimated useful lives. We review other intangible assets with finite lives for impairment if events and circumstances indicate that the carrying value may not be recoverable. For additional information regarding our goodwill and intangible assets, see Note 11. Leases We account for our leases in accordance with ASC 842 - Leases. Most of our leases are recognized on the balance sheet by recording a right-of-use asset and lease liability for each lease. The right-of-use asset represents the right to use the asset under lease for the lease term, and the lease liability represents the contractual obligation to make lease payments. The right-of-use asset is tested for impairment whenever events or changes in circumstances indicate the carrying amount may not be recoverable. As a lessee, WSFS enters into operating leases for certain bank branches, office space, and office equipment. The right-of-use assets and lease liabilities are initially recognized based on the net present value of the remaining lease payments which include renewal options where management is reasonably certain they will be exercised. The net present value is determined using the incremental collateralized borrowing rate at commencement date. The right-of-use asset is measured at the amount of the lease liability adjusted for any prepaid rent, lease incentives and initial direct costs incurred. The right-of-use asset and lease liability is amortized over the individual lease terms. Lease expense for lease payments is recognized on a straight-line basis over the lease term. As a lessor, WSFS provides direct financing to our customers through our equipment and small-business leasing business. Direct financing leases are recorded at the aggregate of minimum lease payments net of unamortized deferred lease origination fees and costs and unearned income. Interest income on direct financing leases is recognized over the term of the lease. Origination fees and costs are deferred, and the net amount is amortized to interest income over the estimated life of the lease. For additional information regarding leases, see Note 10. Income Taxes The provision for income taxes includes federal, state and local income taxes currently payable and those deferred due to temporary differences between the financial statement basis and tax basis of assets and liabilities. We account for income taxes in accordance with ASC 740, Income Taxes. ASC 740 requires the recording of deferred income taxes that reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. It prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. Benefits from tax positions are recognized in the financial statements only when it is more-likely-than-not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. ASC 740 also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties. For additional detail regarding income taxes, see Note 16. Stock-Based Compensation Stock-based compensation is accounted for in accordance with ASC 718, Stock Compensation. Compensation expense relating to all share-based payments is recognized on a straight-line basis, over the applicable vesting period. For additional detail regarding stock-based compensation, see Note 17. Securities Sold Under Agreements to Repurchase We enter into sales of securities under agreements to repurchase which are treated as financings, with the obligation to repurchase securities sold reflected as a liability in the Consolidated Statements of Financial Condition. The securities underlying the agreements are assets. For additional detail regarding the securities sold under agreements to repurchase, see Note 13. Senior Debt On June 13, 2016, the Company issued $100.0 million of 2016 senior notes. The 2016 senior notes mature on June 15, 2026 and have a fixed coupon rate of 4.50% from issuance until June 15, 2021 and a variable coupon rate of three month LIBOR plus 3.30% from June 15, 2021 until maturity. The 2016 senior notes may be redeemed beginning June 15, 2021 at 100% of principal plus accrued and unpaid interest. The remaining net proceeds from the issuance of the 2016 senior notes are being used for general corporate purposes. RECENT ACCOUNTING PRONOUNCEMENTS Accounting Guidance Adopted in 2019 ASU No. 2016-02, Leases (Topic 842): In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This ASU revises lessee accounting. Under the new guidance, lessees will be required to recognize a lease liability and a right-of-use asset for substantially all leases. The new lease guidance also simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. ASU 2016-02 is effective for the first interim period within annual periods beginning after December 15, 2018, with early adoption permitted. Adoption using the comparative modified retrospective transition approach is required; however, in July 2018, the FASB issued ASU 2018-11, Leases-Targeted Improvements, which provides an optional transition method whereby comparative periods presented in the financial statements in the period of adoption do not need to be restated under Topic 842. The Company adopted this guidance and its related amendments on January 1, 2019 using the transition option in ASU 2018-11 and the results of this adoption are recorded in the Consolidated Statements of Financial Condition. See Note 10 for additional disclosures resulting from our adoption of this standard. ASU No. 2019-01, Leases (Topic 842), Codification Improvements: Subsequent to adopting ASU 2016-02, in March 2019, the FASB issued ASU No. 2019-01, Leases (Topic 842): Codification Improvements, which makes targeted changes to lessor accounting and clarifies interim transition disclosure requirements upon adopting Topic 842. The guidance is effective for annual periods beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted. The Company adopted this guidance on March 31, 2019. See Note 10 for additional disclosures resulting from our adoption of this standard. ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities: In March 2017, the FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities. The new guidance requires the amortization period for certain non-contingent callable debt securities held at a premium to end at the earliest call date of the debt security. If the call option is not exercised at the earliest call date, the guidance requires the debt security's effective yield to be reset based on the contractual payment terms of the debt security. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted. Use of the modified retrospective method, with a cumulative-effect adjustment to retained earnings is required. The Company adopted this standard on January 1, 2019, on a modified retrospective basis and the adoption did not have an effect on the Consolidated Financial Statements. ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities (Topic 815): In August 2017, the FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities (Topic 815). The new guidance changes both the designation and measurement guidance for qualifying hedging relationships and simplifies the presentation of hedge results. Specifically, the guidance eliminates the requirement to separately measure and report hedge ineffectiveness and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Further, the new guidance provides entities the ability to apply hedge accounting to additional hedging strategies as well as permits a one-time reclassification of eligible to be hedged instruments from held to maturity to available for sale upon adoption. The guidance is effective in annual and interim periods beginning after December 15, 2018. Early adoption is permitted. Adoption using the modified retrospective approach is required for hedging relationships that exist as of the date of adoption; presentation and disclosure requirements are applied prospectively. The Company adopted this standard on January 1, 2019, on a modified retrospective basis for existing hedging relationships and on a prospective basis for presentation and disclosure requirements. The adoption of this standard did not have an effect on the Consolidated Financial Statements. See Note 20 for additional disclosures resulting from our adoption of this standard. ASU No. 2018-16, Derivatives and Hedging - Inclusion of the Secured Overnight Financial Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes (Topic 815): In October 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging - Inclusion of the Secured Overnight Financial Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes (Topic 815). The new guidance applies to all entities that elect to apply hedge accounting to benchmark interest rate hedges under Topic 815. It permits the use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes in addition to the existing applicable rates. The guidance is required to be adopted concurrently with ASU 2017-12, on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after adoption. The Company adopted this standard on January 1, 2019 on a prospective basis and the adoption did not have an effect on the Consolidated Financial Statements. Accounting Guidance Pending Adoption at December 31, 2019 ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 replaces the incurred loss impairment methodology in current GAAP with the current expected credit losses (CECL) methodology which requires management consideration and judgment of a broader range of information to determine credit loss estimates. In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, clarifying that operating lease receivables are not within the scope of Topic 326. In December 2018, federal regulators issued a final rule related to regulatory capital and CECL (Regulatory Capital Rule: Implementation and Transition of the Current Expected Credit Losses Methodology for Allowances and Related Adjustments to the Regulatory Capital Rule and Conforming Amendments to Other Regulations), intended to provide regulatory capital relief for entities transitioning to CECL. In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief, providing entities the option to irrevocably elect the fair value option on eligible financial instruments, which excludes held-to-maturity debt securities. In November 2019, the FASB issued ASU No. 2019-11, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, clarifying guidance on expected recoveries for purchased credit deteriorated financial assets, accrued interest receivable and collateral maintenance provisions and providing transition relief for troubled debt restructurings. Based on our implementation efforts to date, selected modeling methodologies, portfolio composition, and expected economic conditions and forecasts at December 31, 2019, management anticipates that the adoption will increase our allowance for credit losses (ACL) by $30 - $40 million from year-end 2019 reserves. WSFS is in the process of finalizing its Day 1 impact including the review of certain assumptions such as economic factors, qualitative adjustments and utilization rates, as well as completing the overall governance process for the new ACL. WSFS plans to elect to phase in the CECL transition impact for regulatory capital purposes through 2023. The Company will adopt this guidance on January 1, 2020 using the modified retrospective approach and will recognize the cumulative effect of the transition, net of taxes ($24 - $32 million), as an adjustment to beginning retained earnings. The Company will adopt this guidance using the prospective approach for financial assets purchased with credit deterioration (PCD) that were previously classified as purchase credit impaired (PCI) and accounted for 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. Using the allowance for credit loss calculated at transition for the PCD loans, the allowance was added to the carrying amount to establish the new amortized cost basis. The difference between the unpaid principal balance and the new amortized cost basis is the noncredit premium or discount which will be amortized into interest income over the remaining life of the PCD loan. Subsequent paragraphs detail significant CECL inputs and assumptions management have used to calculate the impact of CECL. The following financial assets measured at amortized cost, were included in our CECL evaluation: loans, purchased financial assets, and held to maturity debt securities. Amortized cost is the amount at which a financial asset is originated or acquired, adjusted for the amortization of premium and discount, net deferred fees or costs, collection of cash, write-offs, and fair value hedge accounting adjustments. Other financial assets also under CECL’s scope were our direct financing leases, available for sale securities, and unfunded commitments. Loans and Leases – The allowance for credit losses includes quantitative and qualitative factors that comprise management's current estimate of expected credit losses, including our portfolio mix and segmentation, modeling methodology, historical loss experience, relevant available information from internal and external sources relating to reasonable and supportable forecasts about the future economic conditions, prepayment speeds, and qualitative adjustment factors. The Company's portfolio segments, established based on similar risk characteristics and loss behaviors include: •Commercial and industrial, owner-occupied commercial, commercial mortgages, construction and commercial small business leases (collectively, the commercial loans), and •Residential, equity secured lines and loans, installment loans, unsecured lines of credit and education loans (collectively, the retail loans). Expected credit losses are estimated over the contractual term, adjusted for expected prepayments and recoveries. The contractual term excludes any extensions, renewals and modifications unless the Company has reasonable expectations at the reporting date that it will result in a TDR or they are not unconditionally cancellable. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The allowance includes two primary components: (i) an allowance established on loans which share similar risk characteristics collectively evaluated for credit losses (collective or pool basis) and (ii) an allowance established on loans which do not share similar risk characteristics with any pool of loans and is individually evaluated for credit losses (individual basis). Loans that share similar risk characteristics are collectively reviewed for credit loss and are evaluated based on historical loss experience, adjusted for current conditions and future forecasts. Estimated losses for pooled portfolios are determined differently for commercial loan pools and retail loan pools, and each portfolio segment is further segmented by internally assessed risk ratings. Management uses a third-party economic forecast to modify the calculated historical loss rates of the portfolio segments. Our economic forecasts out 6 quarters and reverts to the historical loss rate on a straight-line basis over 4 quarters (the reversion period) as we believe this to be reasonable and supportable in the current environment. The economic forecast and reversion periods will be evaluated periodically by management and updated as appropriate. The historical loss rate for commercial loans is estimated by determining the probability of default (PD) and expected loss severity upon default (LGD). The probability of default is calculated based on the historical rate of migration to an event of credit loss during the lookback period. The historical loss rate for retail loans are calculated based solely on average net loss rates over the same look-back period. Our current look-back period is 36 quarters which allows us to ensure that historical loss rates are adequately considering losses within a full credit cycle. Loans that do not share similar risk characteristics with any pool of loans are evaluated on an individual basis. These loans, which may include TDRs, are not included in the collective basis evaluation. When it is probable we will not collect all principal and interest due according to their contractual terms, which is assessed based on the credit characteristics of the loan and/or payment status, these loans are individually reviewed and measured for potential credit loss. The amount of the potential credit loss is measured using one of three methods: (i) the present value of expected future cash flows discounted at the loan’s effective interest rate; (ii) the fair value of collateral, if the loan is collateral dependent or (iii) the loan’s observable market price. If the measured fair value of the loan is less than the amortized cost basis of the loan, an allowance for credit losses is recorded. For collateral dependent loans, the expected credit losses at the individual asset level is the difference between the collateral's fair value (less cost to sell) and the amortized cost, if both criteria are met: •Repayment is expected to be provided substantially through operation or sale of the collateral, and •The borrower is experiencing financial difficulty. Qualitative adjustment factors consider various current internal and external conditions which are allocated among loan types and take into consideration: •Current underwriting policies, staff and portfolio concentrations, •Risk rating accuracy, credit and administration, •Internal risk emergence (including internal trends of delinquency, and criticized loans by segment), •Economic forecasts and conditions - locally and nationally (including market trends impacting collateral values), and •Competitive environment, as it could impact loan structure and underwriting. These factors are based on their relative standing compared to the period in which historic losses are used in quantitative reserve estimates and current directional trends. Qualitative factors in our model can add to or subtract from quantitative reserves. Held to Maturity Debt Securities – We measure expected credit losses on held-to-maturity debt securities on a collective basis by security investment grade. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. The Company classifies the held to maturity debt securities into the following major security types: state and political subdivisions, and foreign bonds. These securities are highly rated with a history of no credit losses, and are assigned ratings based on the most recent data from ratings agencies depending on the availability of data for the security. Credit ratings of held-to-maturity debt securities, which are a significant input in calculating the expected credit loss, are reviewed on a quarterly basis. Available for Sale Debt Securities –We follow ASC 326-30, Financial Instruments - Credit Loss - Available for Sale Debt Securities, which provides guidance related to the recognition of and expanded disclosure requirements for expected credit losses on available for sale debt securities. For available for sale debt securities in an unrealized loss position, the Company first evaluates whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either criteria is met, the security's amortized cost basis is reduced to fair value and recognized as a reduction to noninterest income in the Consolidated Statements of Income. For debt securities available for sale which the Company does not intend to sell, or it is not likely the security would be required to be sold before recovery, we evaluate whether a decline in fair value has resulted from credit losses or other adverse factors, such as a change in the security's credit rating. In assessing whether credit loss exists, the Company compares the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance is recorded, limited to the fair value of the security. Management performs this analysis on a quarterly basis to review the conditions and risks associated with the individual securities. Credit losses on an impaired security shall continue to be measured using the present value of expected future cash flows. Any impairment not recorded through an allowance for credit loss is included in other comprehensive income (loss), net of the tax effect. We are required to use our judgment in determining impairment in certain circumstances. Unfunded Commitments – The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposure is adjusted as a provision for credit loss expense. 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, based on historical losses, reasonable and supportable forecasts on future economic conditions, prepayments speeds, and qualitative adjustment factors. The allowance for credit losses for off-balance sheet exposure is included within Other liabilities on the Consolidated Statements of Financial Condition and the provision for credit losses for off-balance sheet exposure is included within Other operating expense on the Consolidated Statements of Income. ASU No. 2018-13, Fair Value Measurement Disclosure Framework: In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement Disclosure Framework, which amends ASC 820 - Fair Value Measurement. The new guidance modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements for fair value measurements. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption is required on either a prospective or retrospective basis, depending on the amendment. The Company will adopt this guidance on January 1, 2020 and does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements. ASU No. 2018-14, Compensation-Retirement Benefits - Defined Benefit Plans-General (Topic 715): In August 2018, the FASB issued ASU No. 2018-14, Compensation-Retirement Benefits - Defined Benefit Plans-General (Topic 715) which applies to all employers that provide defined benefit pension or other postretirement benefit plans for their employees. The new guidance modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements to financial statement users. The guidance is effective for annual periods beginning after December 15, 2020. Early adoption is permitted. Use of the retrospective method is required. The Company does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements. ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350): In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350). The new guidance provides clarity on capitalizing and expensing implementation costs for cloud computing arrangements in a service contract. If an implementation cost is capitalized, the cost should be recognized over the noncancellable term and periodically assessed for impairment. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption can be applied retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company will adopt this guidance on January 1, 2020 on a prospective basis and does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements at the time of adoption. ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments: In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. The new guidance amends ASU 2016-13 to address topics related to accrued interest receivables, recoveries, disclosures, and provides certain other clarifications. The new guidance also amends ASU 2017-12 to provide clarification on certain hedge accounting topics and transition requirements. Lastly, the new guidance amends ASU 2016-01, Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities, to add clarifying guidance when using the measurement alternative under ASC 820, among certain other clarifications. The guidance is effective for annual periods beginning after December 15, 2019. Early adoption is permitted. Adoption is required on a prospective, modified-retrospective or retrospective basis, depending on the amendment. The Company will evaluate the amendments to ASU 2016-13 in conjunction with our overall evaluation of ASU 2016-13. For other amendments within this guidance, the Company will adopt this guidance on January 1, 2020 and does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements. ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes: In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The guidance adds new amendments to simplify income tax accounting and removes certain exceptions and modifies the accounting for certain income tax transactions. The guidance is effective for annual periods beginning after December 15, 2020. Early adoption is permitted. Adoption is required on a prospective, modified-retrospective or retrospective basis, depending on the amendment. The Company does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements.

•Securities not classified as either trading or held to maturity are classified as “available-for-sale” and reported at fair value, with unrealized gains and losses excluded from earnings and reported, net of tax, as a separate component of stockholders’ equity in accumulated other comprehensive income (loss). Realized gains and losses on sales of investment and mortgage-backed securities (MBS) are determined using the specific identification method. All sales are made without recourse.

Premiums and discounts on MBS collateralized by residential 1-4 family loans are recognized in interest income using a level yield method over the period to expected maturity. Premiums and discounts on all other securities are recognized on a straight line basis over the period to expected maturity, with the exception of premiums on callable debt securities, which are recognized over the period to the earliest call date.

We follow Accounting Standards Codification (ASC) 320-10, Investments - Debt Securities which provides guidance related to the recognition of and expanded disclosure requirements for other-than-temporary impaired (OTTI) debt securities. We are required to use our judgment in determining impairment in certain circumstances. When we conclude an investment security is other than temporarily impaired, and we intend to sell the debt security or it is more likely than not that we will be required to sell it before recovery, an OTTI write-down is recognized as a reduction to noninterest income in the Consolidated Statements of Income, equal to the entire difference between the security’s amortized cost basis and its fair value. If we do not intend to sell the investment security and conclude that it is not more likely than not we will be required to sell the security before recovering the carrying value, which may be maturity, the OTTI charge is separated into a “credit” and “other” component. The “credit” component of OTTI is included as a reduction to earnings and the “other” component of OTTI is included in other comprehensive income (loss), net of tax.

Equity investments include our Visa Class B share holdings and certain other equity investments. The fair value of equity investments with readily determinable fair values is primarily obtained from third-party pricing services. For equity investments without readily determinable fair values, when an orderly transaction for the identical or similar investment of the same issuer is identified, we use valuation techniques permitted under ASC 820, Fair Value Measurement, to evaluate the observed transaction(s) and adjust the carrying value.

ASC 321-10 also provides impairment accounting guidance for equity securities without readily determinable fair values. The qualitative assessment to determine whether impairment exists requires the use of our judgment. If, after completing the qualitative assessment, we conclude an equity investment without a readily determinable fair value is impaired, a loss for the difference between the equity investment’s carrying value and its fair value may be recognized as a reduction to noninterest income in the Consolidated Statements of Income.

A loan is impaired when, based on current information and events, it is probable we will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impaired loans are measured in accordance with the provisions of ASC 310, Receivables, based on one of three methods: (i) the present value of expected future discounted cash flows at the loan’s effective interest rate, (ii) the loan’s observable market price, (iii) the fair value of the underlying collateral if the loan is collateral dependent. All loans restructured in a troubled debt restructuring are considered to be impaired. Our policy for recognition of interest income on impaired loans, excluding accruing loans, is the same as for nonaccrual loans discussed below.

In addition to originating loans, we occasionally acquire loans through acquisitions or loan purchase transactions. Certain acquired loans may exhibit deteriorated credit quality that has occurred since origination and we may not expect to collect all contractual payments. We account for these purchased credit-impaired loans in accordance with ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. The loans are initially recorded at fair value on the acquisition date, reflecting the present value of the cash flows expected to be collected. Income recognition on these loans is based on reasonable expectations on timing and amount of cash flows to be collected. Purchased credit impaired loans are evaluated for impairment on a quarterly basis with a complete updating of the estimated cash flows on a semi-annual basis. If a loan is determined to be impaired but considered collateral dependent, it will have no accretable yield.

Nonaccruing loans are those on which the accrual of interest has ceased. Loans are placed on nonaccrual status immediately if, in the opinion of management, collection is doubtful, or when principal or interest is past due 90 days or more and the loan is not well secured and in the process of collection. Interest accrued but not collected at the date a loan is placed on nonaccrual status is reversed and charged against interest income. In addition, the amortization of net deferred loan fees is suspended when a loan is placed on nonaccrual status. Subsequent cash receipts are applied either to the outstanding principal balance or recorded as interest income, depending on management’s assessment of the ultimate collectability of principal and interest. Loans are returned to an accrual status when we assess that the borrower has the ability to make all principal and interest payments in accordance with the terms of the loan (i.e. a consistent repayment record, generally six consecutive payments, has been demonstrated).

We maintain an allowance for loan and lease losses (allowance) which represents our best estimate of probable losses within our loan portfolio. As losses are realized, they are charged to the allowance. We establish our allowance in accordance with guidance provided in ASC 450, Contingencies, ASC 310, and the SEC’s Staff Accounting Bulletin 102, Selected Loan Loss Allowance Methodology and Documentation Issues (SAB 102). The allowance includes two primary components: (i) an allowance established on loans collectively evaluated for impairment (general allowance), and (ii) an allowance established on loans individually evaluated for impairment (specific allowance). In addition, we also maintain an allowance for acquired loans as necessary.

The general allowance is calculated on a pooled loan basis using both quantitative and qualitative factors in accordance with ASC 450. The specific allowance is calculated on an individual loan basis when collectability of all contractually due principal and interest is no longer believed to be probable in accordance with ASC 310. Lastly, the allowance related to acquired loans is calculated when (i) there is deterioration in credit quality subsequent to acquisition for loans accounted for under ASC 310-30, and (ii) the inherent losses in the loans exceed the remaining total loan mark recorded at the time of acquisition for loans accounted for under ASC 310-20, Receivables - Nonrefundable Fees and Other Costs.

Allowances for pooled homogeneous loans, that are not deemed impaired, are based on historical net loss experience. Estimated losses for pooled portfolios are determined differently for commercial loan pools and retail loan pools. Commercial loans are pooled as follows: commercial and industrial, owner-occupied commercial, commercial mortgages and construction. Each pool is further segmented by internally assessed risk ratings. Loan losses for commercial loans are estimated by determining the probability of default and expected loss severity upon default. The probability of default is calculated based on the historical rate of migration to impaired status during the last 36 quarters. During the year ended December 31, 2019, we increased the look-back period to 36 quarters from 32 quarters used at December 31, 2018. This increase in the look-back period allows us to continue to anchor to the fourth quarter of 2010 to ensure that the quantitative reserves calculated by the allowance for loan and lease loss model are adequately considering the losses within a full credit cycle. Loss severity upon default is calculated as the actual loan losses (net of recoveries) on impaired loans in their respective pool during the same time frame. Retail loans are pooled into the following segments: residential mortgage, consumer secured and consumer unsecured loans. Pooled reserves for retail loans are calculated based solely on average net loss rates over the same 36 quarter look-back period.

The allowance methodology uses a loss emergence period (LEP), which is the period of time between an event that triggers the probability of a loss and the confirmation of the loss. We estimate the commercial LEP to be approximately nine quarters as of December 31, 2019. Our residential mortgage and consumer LEP remained at four quarters as of December 31, 2019.

Our loan officers and risk managers meet at least quarterly to discuss and review the conditions and risks associated with individual problem loans. In addition, various regulatory agencies periodically review our loan ratings and allowance for loan and lease losses and the Bank’s internal loan review department performs loan reviews.

For impaired loans, if the measure is less than the recorded investment in the loan, a related allowance is allocated for the impairment. Impairment of troubled debt restructurings are measured at the present value of estimated future cash flows using the loan’s effective interest rate at inception or the fair value of the underlying collateral if the loan is collateral dependent. Troubled debt restructurings consist of concessions granted to borrowers facing financial difficulty.

Derivative financial instruments related to mortgage banking activities are recorded at fair value and are not designated as accounting hedges. This includes commitments to originate certain fixed-rate residential mortgage loans to customers, also referred to as interest rate lock commitments. We may also enter into forward sale commitments to sell loans to investors at a fixed price at a future date and trade asset-backed securities to mitigate interest rate risk.

Upon initial receipt, other real estate owned (OREO) is recorded at the estimated fair value less costs to sell. Costs subsequently incurred to improve the assets are capitalized, provided that the resultant carrying value does not exceed the estimated fair value less costs to sell. Costs related to holding or disposing of the assets are charged to expense as incurred. We periodically evaluate OREO for impairment and write-down the value of the asset when declines in fair value below the carrying value are identified. Loan workout and OREO expenses include costs of holding and operating the assets, net gains or losses on sales of the assets and provisions for losses to reduce such assets to the estimated fair values less costs to sell.

Premises and equipment are stated at cost less accumulated depreciation and amortization. Costs of major replacements, improvements and additions are capitalized. Depreciation and amortization expense is computed on a straight-line basis over the estimated useful lives of the assets or, for leasehold improvements, over the terms of the related lease or effective useful lives of the assets, whichever is less. In general, computer equipment, furniture and equipment and building renovations are depreciated over three, five and ten years, respectively. Premises and equipment acquired in business combinations are initially recorded at fair value and subsequently carried at cost less accumulated depreciation and amortization. Assets to be disposed of are recorded at the lower of the carrying amount or fair value less costs to sell.

We account for goodwill and intangible assets in accordance with ASC 805, Business Combinations and ASC 350, Intangibles-Goodwill and Other. Accounting for goodwill and other intangible assets requires the Company to make significant judgments, for goodwill particularly, with respect to estimating the fair value of each reporting unit and when required, estimating the fair value of net assets. The estimates utilize historical data, cash flows, and market and industry data specific to each reporting unit as well as projected data. Industry and market data are used to develop material assumptions such as transaction multiples, required rates of return, control premiums, transaction costs and synergies of a transaction, and capitalization.

We account for our leases in accordance with ASC 842 - Leases. Most of our leases are recognized on the balance sheet by recording a right-of-use asset and lease liability for each lease. The right-of-use asset represents the right to use the asset under lease for the lease term, and the lease liability represents the contractual obligation to make lease payments. The right-of-use asset is tested for impairment whenever events or changes in circumstances indicate the carrying amount may not be recoverable.

As a lessee, WSFS enters into operating leases for certain bank branches, office space, and office equipment. The right-of-use assets and lease liabilities are initially recognized based on the net present value of the remaining lease payments which include renewal options where management is reasonably certain they will be exercised. The net present value is determined using the incremental collateralized borrowing rate at commencement date. The right-of-use asset is measured at the amount of the lease liability adjusted for any prepaid rent, lease incentives and initial direct costs incurred. The right-of-use asset and lease liability is amortized over the individual lease terms. Lease expense for lease payments is recognized on a straight-line basis over the lease term.

As a lessor, WSFS provides direct financing to our customers through our equipment and small-business leasing business. Direct financing leases are recorded at the aggregate of minimum lease payments net of unamortized deferred lease origination fees and costs and unearned income. Interest income on direct financing leases is recognized over the term of the lease. Origination fees and costs are deferred, and the net amount is amortized to interest income over the estimated life of the lease.

We account for income taxes in accordance with ASC 740, Income Taxes. ASC 740 requires the recording of deferred income taxes that reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. It prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. Benefits from tax positions are recognized in the financial statements only when it is more-likely-than-not that the tax position will be sustained upon examination by the appropriate taxing authority that would have full knowledge of all relevant information. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more-likely-than-not recognition threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not recognition threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. ASC 740 also provides guidance on the accounting for and disclosure of unrecognized tax benefits, interest and penalties.

On June 13, 2016, the Company issued $100.0 million of 2016 senior notes. The 2016 senior notes mature on June 15, 2026 and have a fixed coupon rate of 4.50% from issuance until June 15, 2021 and a variable coupon rate of three month LIBOR plus 3.30% from June 15, 2021 until maturity. The 2016 senior notes may be redeemed beginning June 15, 2021 at 100% of principal plus accrued and unpaid interest. The remaining net proceeds from the issuance of the 2016 senior notes are being used for general corporate purposes.

ASU No. 2016-02, Leases (Topic 842): In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This ASU revises lessee accounting. Under the new guidance, lessees will be required to recognize a lease liability and a right-of-use asset for substantially all leases. The new lease guidance also simplifies the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. ASU 2016-02 is effective for the first interim period within annual periods beginning after December 15, 2018, with early adoption permitted. Adoption using the comparative modified retrospective transition approach is required; however, in July 2018, the FASB issued ASU 2018-11, Leases-Targeted Improvements, which provides an optional transition method whereby comparative periods presented in the financial statements in the period of adoption do not need to be restated under Topic 842. The Company adopted this guidance and its related amendments on January 1, 2019 using the transition option in ASU 2018-11 and the results of this adoption are recorded in the Consolidated Statements of Financial Condition. See Note 10 for additional disclosures resulting from our adoption of this standard.

ASU No. 2019-01, Leases (Topic 842), Codification Improvements: Subsequent to adopting ASU 2016-02, in March 2019, the FASB issued ASU No. 2019-01, Leases (Topic 842): Codification Improvements, which makes targeted changes to lessor accounting and clarifies interim transition disclosure requirements upon adopting Topic 842. The guidance is effective for annual periods beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted. The Company adopted this guidance on March 31, 2019. See Note 10 for additional disclosures resulting from our adoption of this standard.

ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities: In March 2017, the FASB issued ASU No. 2017-08, Premium Amortization on Purchased Callable Debt Securities. The new guidance requires the amortization period for certain non-contingent callable debt securities held at a premium to end at the earliest call date of the debt security. If the call option is not exercised at the earliest call date, the guidance requires the debt security's effective yield to be reset based on the contractual payment terms of the debt security. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2018. Early adoption is permitted. Use of the modified retrospective method, with a cumulative-effect adjustment to retained earnings is required. The Company adopted this standard on January 1, 2019, on a modified retrospective basis and the adoption did not have an effect on the Consolidated Financial Statements.

ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities (Topic 815): In August 2017, the FASB issued ASU No. 2017-12, Targeted Improvements to Accounting for Hedging Activities (Topic 815). The new guidance changes both the designation and measurement guidance for qualifying hedging relationships and simplifies the presentation of hedge results. Specifically, the guidance eliminates the requirement to separately measure and report hedge ineffectiveness and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. Further, the new guidance provides entities the ability to apply hedge accounting to additional hedging strategies as well as permits a one-time reclassification of eligible to be hedged instruments from held to maturity to available for sale upon adoption. The guidance is effective in annual and interim periods beginning after December 15, 2018. Early adoption is permitted. Adoption using the modified retrospective approach is required for hedging relationships that exist as of the date of adoption; presentation and disclosure requirements are applied prospectively. The Company adopted this standard on January 1, 2019, on a modified retrospective basis for existing hedging relationships and on a prospective basis for presentation and disclosure requirements. The adoption of this standard did not have an effect on the Consolidated Financial Statements. See Note 20 for additional disclosures resulting from our adoption of this standard.

ASU No. 2018-16, Derivatives and Hedging - Inclusion of the Secured Overnight Financial Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes (Topic 815): In October 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging - Inclusion of the Secured Overnight Financial Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes (Topic 815). The new guidance applies to all entities that elect to apply hedge accounting to benchmark interest rate hedges under Topic 815. It permits the use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes in addition to the existing applicable rates. The guidance is required to be adopted concurrently with ASU 2017-12, on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after adoption. The Company adopted this standard on January 1, 2019 on a prospective basis and the adoption did not have an effect on the Consolidated Financial Statements.

ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326). ASU 2016-13 replaces the incurred loss impairment methodology in current GAAP with the current expected credit losses (CECL) methodology which requires management consideration and judgment of a broader range of information to determine credit loss estimates.

In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, clarifying that operating lease receivables are not within the scope of Topic 326. In December 2018, federal regulators issued a final rule related to regulatory capital and CECL (Regulatory Capital Rule: Implementation and Transition of the Current Expected Credit Losses Methodology for Allowances and Related Adjustments to the Regulatory Capital Rule and Conforming Amendments to Other Regulations), intended to provide regulatory capital relief for entities transitioning to CECL. In May 2019, the FASB issued ASU No. 2019-05, Financial Instruments-Credit Losses (Topic 326): Targeted Transition Relief, providing entities the option to irrevocably elect the fair value option on eligible financial instruments, which excludes held-to-maturity debt securities. In November 2019, the FASB issued ASU No. 2019-11, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, clarifying guidance on expected recoveries for purchased credit deteriorated financial assets, accrued interest receivable and collateral maintenance provisions and providing transition relief for troubled debt restructurings.

Based on our implementation efforts to date, selected modeling methodologies, portfolio composition, and expected economic conditions and forecasts at December 31, 2019, management anticipates that the adoption will increase our allowance for credit losses (ACL) by $30 - $40 million from year-end 2019 reserves. WSFS is in the process of finalizing its Day 1 impact including the review of certain assumptions such as economic factors, qualitative adjustments and utilization rates, as well as completing the overall governance process for the new ACL. WSFS plans to elect to phase in the CECL transition impact for regulatory capital purposes through 2023.

The Company will adopt this guidance on January 1, 2020 using the modified retrospective approach and will recognize the cumulative effect of the transition, net of taxes ($24 - $32 million), as an adjustment to beginning retained earnings. The Company will adopt this guidance using the prospective approach for financial assets purchased with credit deterioration (PCD) that were previously classified as purchase credit impaired (PCI) and accounted for 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. Using the allowance for credit loss calculated at transition for the PCD loans, the allowance was added to the carrying amount to establish the new amortized cost basis. The difference between the unpaid principal balance and the new amortized cost basis is the noncredit premium or discount which will be amortized into interest income over the remaining life of the PCD loan.

The following financial assets measured at amortized cost, were included in our CECL evaluation: loans, purchased financial assets, and held to maturity debt securities. Amortized cost is the amount at which a financial asset is originated or acquired, adjusted for the amortization of premium and discount, net deferred fees or costs, collection of cash, write-offs, and fair value hedge accounting adjustments. Other financial assets also under CECL’s scope were our direct financing leases, available for sale securities, and unfunded commitments.

Loans and Leases – The allowance for credit losses includes quantitative and qualitative factors that comprise management's current estimate of expected credit losses, including our portfolio mix and segmentation, modeling methodology, historical loss experience, relevant available information from internal and external sources relating to reasonable and supportable forecasts about the future economic conditions, prepayment speeds, and qualitative adjustment factors.

Expected credit losses are estimated over the contractual term, adjusted for expected prepayments and recoveries. The contractual term excludes any extensions, renewals and modifications unless the Company has reasonable expectations at the reporting date that it will result in a TDR or they are not unconditionally cancellable. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off.

The allowance includes two primary components: (i) an allowance established on loans which share similar risk characteristics collectively evaluated for credit losses (collective or pool basis) and (ii) an allowance established on loans which do not share similar risk characteristics with any pool of loans and is individually evaluated for credit losses (individual basis).

Loans that share similar risk characteristics are collectively reviewed for credit loss and are evaluated based on historical loss experience, adjusted for current conditions and future forecasts. Estimated losses for pooled portfolios are determined differently for commercial loan pools and retail loan pools, and each portfolio segment is further segmented by internally assessed risk ratings.

Management uses a third-party economic forecast to modify the calculated historical loss rates of the portfolio segments. Our economic forecasts out 6 quarters and reverts to the historical loss rate on a straight-line basis over 4 quarters (the reversion period) as we believe this to be reasonable and supportable in the current environment. The economic forecast and reversion periods will be evaluated periodically by management and updated as appropriate.

The historical loss rate for commercial loans is estimated by determining the probability of default (PD) and expected loss severity upon default (LGD). The probability of default is calculated based on the historical rate of migration to an event of credit loss during the lookback period. The historical loss rate for retail loans are calculated based solely on average net loss rates over the same look-back period. Our current look-back period is 36 quarters which allows us to ensure that historical loss rates are adequately considering losses within a full credit cycle.

Loans that do not share similar risk characteristics with any pool of loans are evaluated on an individual basis. These loans, which may include TDRs, are not included in the collective basis evaluation. When it is probable we will not collect all principal and interest due according to their contractual terms, which is assessed based on the credit characteristics of the loan and/or payment status, these loans are individually reviewed and measured for potential credit loss. The amount of the potential credit loss is measured using one of three methods: (i) the present value of expected future cash flows discounted at the loan’s effective interest rate; (ii) the fair value of collateral, if the loan is collateral dependent or (iii) the loan’s observable market price. If the measured fair value of the loan is less than the amortized cost basis of the loan, an allowance for credit losses is recorded.

Held to Maturity Debt Securities – We measure expected credit losses on held-to-maturity debt securities on a collective basis by security investment grade. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts.

The Company classifies the held to maturity debt securities into the following major security types: state and political subdivisions, and foreign bonds. These securities are highly rated with a history of no credit losses, and are assigned ratings based on the most recent data from ratings agencies depending on the availability of data for the security. Credit ratings of held-to-maturity debt securities, which are a significant input in calculating the expected credit loss, are reviewed on a quarterly basis.

Available for Sale Debt Securities –We follow ASC 326-30, Financial Instruments - Credit Loss - Available for Sale Debt Securities, which provides guidance related to the recognition of and expanded disclosure requirements for expected credit losses on available for sale debt securities. For available for sale debt securities in an unrealized loss position, the Company first evaluates whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either criteria is met, the security's amortized cost basis is reduced to fair value and recognized as a reduction to noninterest income in the Consolidated Statements of Income.

For debt securities available for sale which the Company does not intend to sell, or it is not likely the security would be required to be sold before recovery, we evaluate whether a decline in fair value has resulted from credit losses or other adverse factors, such as a change in the security's credit rating. In assessing whether credit loss exists, the Company compares the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance is recorded, limited to the fair value of the security.

Management performs this analysis on a quarterly basis to review the conditions and risks associated with the individual securities. Credit losses on an impaired security shall continue to be measured using the present value of expected future cash flows. Any impairment not recorded through an allowance for credit loss is included in other comprehensive income (loss), net of the tax effect. We are required to use our judgment in determining impairment in certain circumstances.

Unfunded Commitments – The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposure is adjusted as a provision for credit loss expense. 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, based on historical losses, reasonable and supportable forecasts on future economic conditions, prepayments speeds, and qualitative adjustment factors.

ASU No. 2018-13, Fair Value Measurement Disclosure Framework: In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement Disclosure Framework, which amends ASC 820 - Fair Value Measurement. The new guidance modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements for fair value measurements. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption is required on either a prospective or retrospective basis, depending on the amendment. The Company will adopt this guidance on January 1, 2020 and does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements.

ASU No. 2018-14, Compensation-Retirement Benefits - Defined Benefit Plans-General (Topic 715): In August 2018, the FASB issued ASU No. 2018-14, Compensation-Retirement Benefits - Defined Benefit Plans-General (Topic 715) which applies to all employers that provide defined benefit pension or other postretirement benefit plans for their employees. The new guidance modifies, adds and removes certain disclosures aimed to improve the overall usefulness of the disclosure requirements to financial statement users. The guidance is effective for annual periods beginning after December 15, 2020. Early adoption is permitted. Use of the retrospective method is required. The Company does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements.

ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350): In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350). The new guidance provides clarity on capitalizing and expensing implementation costs for cloud computing arrangements in a service contract. If an implementation cost is capitalized, the cost should be recognized over the noncancellable term and periodically assessed for impairment. The guidance is effective in annual and interim periods in fiscal years beginning after December 15, 2019. Early adoption is permitted. Adoption can be applied retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company will adopt this guidance on January 1, 2020 on a prospective basis and does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements at the time of adoption.

ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments: In April 2019, the FASB issued ASU No. 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. The new guidance amends ASU 2016-13 to address topics related to accrued interest receivables, recoveries, disclosures, and provides certain other clarifications. The new guidance also amends ASU 2017-12 to provide clarification on certain hedge accounting topics and transition requirements. Lastly, the new guidance amends ASU 2016-01, Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities, to add clarifying guidance when using the measurement alternative under ASC 820, among certain other clarifications. The guidance is effective for annual periods beginning after December 15, 2019. Early adoption is permitted. Adoption is required on a prospective, modified-retrospective or retrospective basis, depending on the amendment. The Company will evaluate the amendments to ASU 2016-13 in conjunction with our overall evaluation of ASU 2016-13. For other amendments within this guidance, the Company will adopt this guidance on January 1, 2020 and does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements.

ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes: In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The guidance adds new amendments to simplify income tax accounting and removes certain exceptions and modifies the accounting for certain income tax transactions. The guidance is effective for annual periods beginning after December 15, 2020. Early adoption is permitted. Adoption is required on a prospective, modified-retrospective or retrospective basis, depending on the amendment. The Company does not expect the application of this guidance to have a material impact on the Consolidated Financial Statements.