Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2020

Accounting Standards Update and Change in Accounting Principle [Abstract]

Investment Securities

Investment Securities

Management measures expected credit losses on held to maturity securities on a collective basis by major security type. Accrued interest receivable on held to maturity securities is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts and is included in investment securities held to maturity, net on the consolidated balance sheets.

For available for sale securities, the Corporation evaluates whether any decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses on investments is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses on investments is recognized in other comprehensive income.

Changes in the allowance for credit losses on investments are recorded as provision for, or reversal of, credit loss expense. Losses are charged against the allowance when management believes the available for sale security is uncollectible or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on available for sale debt securities is excluded from the estimate of credit losses.

Allowance for Loan Losses

Allowance for Credit Losses on Loans

The level of the allowance for loan losses represents management's estimate of an amount appropriate to provide for lifetime credit losses in the loan portfolio at the balance sheet date. The methodology applied by the Corporation is designed to assess the appropriateness of the allowance for loan losses within the Corporation's loan segmentation as well as management’s ongoing review and grading of the loan portfolio into criticized loan categories. The methodology focuses on evaluation of several factors, including but not limited to: evaluation of facts and issues related to specific loans, management's ongoing review and grading of the loan portfolio using a dual risk rating system consisting of probability of default and loss given default models, which are based on loan grades for commercial loans and credit reports for consumer loans applied based on portfolio segmentation leveraging industry breakouts in Commercial and Industrial (C&I) and property types in Commercial Real Estate (CRE) for commercial loans and loan types for consumer loans, consideration of historical credit loss and delinquency experience on each portfolio category, trends in past due and nonaccrual loans, the level of potential problem loans, the risk characteristics of the various classifications of loans, changes in the size and character of the loan portfolio, concentrations of loans to specific borrowers or industries, existing economic conditions and economic forecasts, the fair value of underlying collateral, and other qualitative and quantitative factors which could affect potential loan losses. The Corporation utilizes the Moody's Baseline economic forecast in the allowance model and applies that forecast over a reasonable and supportable period with reversion to historical losses. For additional detail on the reasonable and supportable period and reversion assumptions, see Note 7. The Company estimates the lifetime expected loss using prepayment assumptions over the

projected lifetime cash flow of the loans. Potential problem loans are generally defined by management to include loans rated as substandard by management. Assessing these numerous factors involves significant judgment. The provision for loan losses is predominantly a function of the result of the methodology and other qualitative and quantitative factors used to determine the allowance for loan losses.

Management individually analyzes loans that do not share similar risk characteristics to other loans in the portfolio. Management has determined that commercial loan relationships that have nonaccrual status or commercial and retail loans that have had their terms restructured in a TDR meet this definition. Probable TDRs are loans the Corporation has reviewed individually to determine whether there is a high likelihood that the loans will default and will require restructuring in the near future. Probable TDRs could be classified as Pass, Special Mention, Potential Problem or Nonaccrual within the Corporation's credit quality analysis depending on the specific circumstances surrounding the individual credits. Accrued interest receivable on loans is excluded from the estimate of credit losses.

Allowance for Unfunded Commitments

The allowance for unfunded commitments leverages the same methodology utilized to measure the allowance for loan losses. The Corporation estimates expected credit losses over the contractual period in which the Corporation is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Corporation. 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. See Note 7 for additional information on the ACLL and Note 12 for additional information on the allowance for unfunded commitments.

A portion of the ACLL is comprised of adjustments for qualitative factors not reflected in the quantitative model.

Impact of adopting ASU 2016-13 Financial Instruments - Credit Losses (Topic 326)

Impact of adopting ASU 2016-13 Financial Instruments - Credit Losses (Topic 326)

The following table illustrates the adoption impact:

	December 31, 2019				January 1, 2020
($ in Thousands)	Allowance for Loan Losses		Allowance for Unfunded Commitments		CECL Day 1 Adjustment		ACLL Beginning Balance
Commercial and industrial	$	91,133	$	12,276	$	48,921	$	152,330
Commercial real estate - owner occupied	10,284		127		(1,851)		8,560
Commercial and business lending	101,417		12,403		47,070		160,890
Commercial real estate - investor	40,514		530		2,287		43,331
Real estate construction	24,915		7,532		25,814		58,261
Commercial real estate lending	65,428		8,062		28,101		101,591
Total Commercial	166,846		20,465		75,171		262,482
Residential mortgage	16,960		—		33,215		50,175
Home equity	10,926		1,038		14,240		26,204
Other consumer	6,639		405		8,520		15,564
Total consumer	34,525		1,443		55,975		91,943
Total loans	$	201,371	$	21,907	$	131,147	$	354,425

The allowance for credit losses on held to maturity securities was approximately $61,000 at January 1, 2020, attributable entirely to the Corporation's municipal securities.

At January 1, 2020, the adoption of ASU 2016-13 resulted in an increase to the allowance for loan losses of $112 million and an increase to the allowance for unfunded commitments of $19 million for a total increase to the ACLL of $131 million. A corresponding after tax decrease to common equity of $98 million was recorded along with a deferred tax asset of $33 million.

New Accounting Pronouncements Adopted

New Accounting Pronouncements Adopted

Standard	Description	Date of adoption	Effect on financial statements
ASU 2016-13 Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments	The FASB issued an amendment to replace the current incurred loss impairment methodology. Under the new guidance, entities will be required to measure expected credit losses by utilizing forward-looking information to assess an entity's ACL. The guidance also requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The measurement of expected credit losses is based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate in its circumstances. This amendment was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Entities should apply the amendment by means of a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. ASU 2018-19 was issued to clarify that receivables arising from operating leases are not within the scope of Subtopic 326-20. Instead, impairment of receivables arising from operating leases should be accounted for in accordance with Topic 842, Leases. ASU 2019-04 was issued and provided entities alternatives for measurement of accrued interest receivable, clarified the steps entities should take when recording the transfer of loans or debt securities between measurement classifications or categories and clarifies that entities should include expected recoveries on financial assets. ASU 2019-05 was issued to provide entities that have certain instruments within the scope of Subtopic 320-20 with an option to irrevocably elect the fair value option in Subtopic 825-10. ASU 2020-02 was issued to further explain the measurement of current expected credit losses and the development, governance, and documentation of a systematic methodology.	1st Quarter 2020	The Corporation has adopted the Update using a modified retrospective approach. The Corporation has developed a CECL allowance model which calculates reserves over the life of the loan and is largely driven by portfolio characteristics, risk-grading, economic outlook, and key methodology assumptions. Those assumptions are based upon the existing probability of default and loss given default framework. At adoption, the Corporation utilized a single economic forecast over a 2-year reasonable and supportable forecast period. In the second year, the Corporation used straight-line reversion to historical losses. The Corporation recorded a $131 million adjustment to the ACL related to the adoption of this standard, which includes $61 thousand related to the held to maturity investment securities portfolio. The Corporation has elected to maintain pools accounted for under Subtopic 310-30 at adoption. The Corporation has elected to utilize the 2019 Capital Transition Relief for initial adoption, as well as the 2020 Capital Transition Relief as permitted under applicable regulations. The total impact at adoption equates to an approximately 29 bp net, after tax, reduction in the tangible common equity ratio. Results for the periods after January 1, 2020 are presented in accordance with ASC 326 while prior period amounts continue to be reported in accordance with previously applicable standards.
ASU 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement	The FASB issued an amendment to add, modify, and remove disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the FASB Concepts Statement "Conceptual Framework for Financial Reporting," including the consideration of costs and benefits. The amendment was effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date.	1st Quarter 2020	The Corporation has evaluated and determined it has an immaterial impact with minor changes in presentation.
ASU 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment	The FASB issued an amendment to simplify the subsequent quantitative measurement of goodwill by eliminating step two from the goodwill impairment test. Instead, an entity will perform only step one of its quantitative goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and then recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity will still have the option to perform a qualitative assessment for a reporting unit to determine if the quantitative step one impairment test is necessary. This amendment was effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Entities should apply the amendment prospectively.	1st Quarter 2020	There has been no material impact on results of operations, financial position, and liquidity. The Corporation performs its annual impairment testing in May.

Standard	Description	Date of adoption	Effect on financial statements
ASU 2020-03 Codification Improvements to Financial Instruments	The FASB issued an amendment to further clarify that all entities are required to provide the fair value option disclosures in paragraphs 825-10-50-24 through 50-32. The amendment also states that paragraphs 820-10-35-2A(g) and 820-10-35-18L are to include the phrase nonfinancial items accounted for as derivatives under Topic 815 to be consistent with the previous amendments to Section 820-10-35 that were made by ASU No. 2018-09, Codification Improvements. The amendment also clarifies that the disclosure requirements in Topic 320 apply to the disclosure requirements in Topic 942 for depository and lending institutions along with improving the understandability of the guidance relating to subtopic 470-50 and subtopic 820-10. Lastly, the amendment clarifies that the contractual term of a net investment in a lease determined in accordance with Topic 842 should be the contractual term used to measure expected credit losses under Topic 326 and that when an entity regains control of financial assets sold, an ACL should be recorded in accordance with Topic 326.	1st Quarter 2020	The Corporation has evaluated and determined it has an immaterial impact.
ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting	The FASB issued an amendment to provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendment only applies to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship.	1st Quarter 2020	The Corporation has evaluated the impact of the Update and determined the expedients provided allow for simpler, more streamlined modifications to the financial instruments referencing LIBOR. A small population of loans have been modified under the new standard.

Future Accounting Pronouncements

The expected impact of accounting pronouncements recently issued or proposed but not yet required to be adopted are displayed in the table below:

Standard	Description	Date of anticipated adoption	Effect on financial statements
ASU 2018-14 Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans	The FASB issued an amendment to modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments also added requirements to disclose the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates and an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The amendment also clarifies the disclosure requirements in paragraph 715-20-50-3, which states that certain information for defined benefit pension plans should be disclosed. The amendments in this Update remove disclosures that no longer are considered cost beneficial, clarify the specific requirements of disclosures, and add disclosure requirements identified as relevant. The amendment is effective for fiscal years ending after December 15, 2020. Entities should apply the amendments in this Update on a retrospective basis to all periods presented. Early adoption is permitted.	1st Quarter 2021	The Corporation is currently evaluating the impact on its results of operations, financial position, and liquidity.
ASU 2020-01 Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) Clarifying the Interactions between Topic 321, Topic 323, and Topic 815	The FASB issued an amendment to clarify the interaction of the accounting for equity securities under Topic 321 and investments accounted for under the equity method of accounting in Topic 323 and the accounting for certain forward contracts and purchased options accounted for under Topic 815. The amendments clarify that an entity should consider observable transactions that require it to either apply or discontinue the equity method of accounting for the purposes of applying the measurement alternative in accordance with Topic 321 immediately before applying or upon discontinuing the equity method. The amendments also clarify that for the purpose of applying paragraph 815-10-15-141(a) an entity should not consider whether, upon the settlement of the forward contract or exercise of the purchased option, individually or with existing investments, the underlying securities would be accounted for under the equity method in Topic 323 or the fair value option in accordance with the financial instruments guidance in Topic 825. An entity also would evaluate the remaining characteristics in paragraph 815-10-15-141 to determine the accounting for those forward contracts and purchased options.	1st Quarter 2021	The Corporation is currently evaluating the impact on its results of operations, financial position, and liquidity.