SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements have been prepared pursuant to rules and regulations of the SEC and in compliance with U.S. generally accepted accounting principles ("GAAP"). Because this report is based on an interim period, certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted.
Risks and Uncertainties	Risks and Uncertainties The worldwide spread of COVID-19 has created significant uncertainty in the global economy. The ultimate impact of the COVID-19 pandemic and the extent to which the COVID-19 pandemic and the related government responses impact the Corporation’s business, results of operations and financial condition will depend on future developments, which are highly uncertain and difficult to predict. The Corporation's business is dependent upon the willingness and ability of its employees and customers to conduct banking and other financial transactions. If the global response to contain the COVID-19 pandemic requires further restrictive measures or is unsuccessful, the Corporation could experience a material adverse effect on its business, financial condition, results of operations and cash flows. Since the extent to which the COVID-19 pandemic impacts its operations will depend on future developments that are highly uncertain, the Corporation cannot estimate the impact on its business, financial condition or near or long-term financial or operational results with reasonable certainty. Accordingly, the Corporation is disclosing potentially material items of which it is aware.
Use of Estimates	Use of Estimates To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided and future results could differ.
Operating Segments	Operating Segments While the Corporation monitors the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Corporation-wide basis, and operating segments are aggregated into one as operating results for all segments are similar. Accordingly, all of the financial service operations are considered by management to be aggregated in one reportable operating segment.
Debt Securities	Debt Securities Debt securities are classified as held to maturity and carried at amortized cost when management has the positive intent and ability to hold them to maturity. Debt securities are classified as available for sale when they might be sold before maturity. Securities available for sale are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax. Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated. Gains and losses on sales are recorded on the settlement date and determined using the specific identification method. The Corporation has made a policy election to exclude accrued interest from the amortized cost basis of debt securities and report accrued interest separately in accrued interest receivable and other assets in the condensed consolidated balance sheets. A debt security is placed on nonaccrual status at the time any principal or interest payments become more than 90 days delinquent or if full collection of interest or principal becomes uncertain. Accrued interest for a security placed on nonaccrual is reversed against interest income. There was no accrued interest related to debt securities reversed against interest income for the three and six months ended June 30, 2022 and 2021.
Accounting Pronouncements Adopted in 2021 and Accounting Pronouncements Pending Adoption	Accounting Standards Adopted in 2021 In August 2018, the FASB issued ASU 2018-14, "Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans." ASU 2018-14 amends ASC 715-20, "Compensation - Retirement Benefits - Defined Benefit Plans - General." The amended guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans by removing and adding certain disclosures for these plans. The eliminated disclosures include (a) the amounts in accumulated Other Comprehensive Income expected to be recognized in net periodic benefit costs over the next fiscal year, and (b) the effects of a one percentage point change in assumed health care cost trend rates on the net periodic benefit costs and the benefit obligation for post-retirement health care benefits. Additional disclosures include descriptions of significant gains and losses affecting the benefit obligation for the period. ASU 2018-14 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes." These amendments remove specific exceptions to the general principles in Topic 740 in GAAP. It eliminates the need for an organization to analyze whether the following apply in a given period: exception to the incremental approach for intraperiod tax allocation; exceptions to accounting for basis differences where there are ownership changes in foreign investments; and exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. It also improves financial statement preparers' application of income tax- related guidance and simplifies GAAP for: franchise taxes that are partially based on income; transactions with a government that result in a step up in the tax basis of goodwill; separate financial statements of legal entities that are not subject to tax; and enacts changes in tax laws in interim periods. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted. ASU 2019-12 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures. In January 2020, the FASB issued 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." ASU 2020-01 represents changes to clarify certain interactions between the guidance to account for certain equity securities under Topic 321, the guidance to account for investments under the equity method of accounting in Topic 323, and the guidance in Topic 815. These amendments improve current U.S. GAAP by reducing diversity in practice and increasing comparability of the accounting for these transactions. ASU 2020-01 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures. In October 2020, the FASB issued ASU 2020-08, "Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs." ASU 2020-08 clarifies that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-35-33 for each reporting period. ASU 2020-08 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures. In August 2021, FASB issued ASU 2021-06, "Presentation of Financial Statements (Topic 205), Financial Services—Depository and Lending (Topic 942), and Financial Services—Investment Companies (Topic 946)." ASU 2021-06 updates the codification to align with SEC Final Rule Releases No. 33-10786 and No. 33-10835. Specific to financial institutions, these SEC releases updated required annual statistical disclosures. The amendments in ASU 2021-06 were effective immediately. The updates to the statistical disclosures are reflected in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2021, to align with this guidance. Accounting Pronouncements Pending Adoption In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." ASU 2020-04 provides optional expedients and exceptions for accounting related to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 applies only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform and 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. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Corporation is currently evaluating the effect of the reference rate reform on its consolidated financial statements. In January 2021, the FASB issued ASU 2021-01, "Reference Rate Reform (Topic 848)." ASU 2021-01 expands and clarifies the scope of ASU No. 2020-04 to include derivatives affected by changes in interest rates used for margining, discounting, or contract price alignment, commonly referred to as the “discounting transaction.” Derivatives impacted by the discounting transaction will be eligible for certain optional expedients and exceptions related to contract modifications and hedge accounting as defined in Topic 848. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Corporation is currently evaluating the effect of the reference rate reform on its consolidated financial statements and related disclosures. In March 2022, the FASB issued ASU No. 2022-02, "Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures." This ASU eliminates the separate recognition and measurement guidance for Troubled Debt Restructurings ("TDRs") by creditors. The elimination of the TDR guidance may be adopted prospectively for loan modifications after adoption or on a modified retrospective basis, which would also apply to loans previously modified, resulting in a cumulative effect adjustment to retained earnings in the period of adoption for changes in the allowance for credit losses. This guidance is effective for the Corporation for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. The Corporation is evaluating the effect that ASU 2022-02 will have on its consolidated financial statements and related disclosures. In June 2022, FASB issued ASU No. 2022-03, "Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions." In this ASU, a contractual restriction on the sale of an equity security is not considered in measuring the security's fair value. The ASU also requires certain disclosures for equity securities that are subject to contractual restrictions. This guidance is effective for the Corporation for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years, with early adoption permitted. The Corporation is evaluating the effect that ASU 2022-03 will have on its consolidated financial statements and related disclosures.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

6 Months Ended

Jun. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying condensed consolidated financial statements have been prepared pursuant to rules and regulations of the SEC and in compliance with U.S. generally accepted accounting principles ("GAAP"). Because this report is based on an interim period, certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted.

Risks and Uncertainties

The worldwide spread of COVID-19 has created significant uncertainty in the global economy. The ultimate impact of the COVID-19 pandemic and the extent to which the COVID-19 pandemic and the related government responses impact the Corporation’s business, results of operations and financial condition will depend on future developments, which are highly uncertain and difficult to predict.

The Corporation's business is dependent upon the willingness and ability of its employees and customers to conduct banking and other financial transactions. If the global response to contain the COVID-19 pandemic requires further restrictive measures or is unsuccessful, the Corporation could experience a material adverse effect on its business, financial condition, results of operations and cash flows. Since the extent to which the COVID-19 pandemic impacts its operations will depend on future developments that are highly uncertain, the Corporation cannot estimate the impact on its business, financial condition or near or long-term financial or operational results with reasonable certainty. Accordingly, the Corporation is disclosing potentially material items of which it is aware.

Use of Estimates

To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided and future results could differ.

Operating Segments

While the Corporation monitors the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Corporation-wide basis, and operating segments are aggregated into one as operating results for all segments are similar. Accordingly, all of the financial service operations are considered by management to be aggregated in one reportable operating segment.

Debt Securities

Debt securities are classified as held to maturity and carried at amortized cost when management has the positive intent and ability to hold them to maturity. Debt securities are classified as available for sale when they might be sold before maturity. Securities available for sale are carried at fair value, with unrealized holding gains and losses reported in other comprehensive income, net of tax.

Interest income includes amortization of purchase premium or discount. Premiums and discounts on securities are amortized on the level-yield method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated. Gains and losses on sales are recorded on the settlement date and determined using the specific identification method.

The Corporation has made a policy election to exclude accrued interest from the amortized cost basis of debt securities and report accrued interest separately in accrued interest receivable and other assets in the condensed consolidated balance sheets. A debt security is placed on nonaccrual status at the time any principal or interest payments become more than 90 days delinquent or if full collection of interest or principal becomes uncertain. Accrued interest for a security placed on nonaccrual is reversed against interest income. There was no accrued interest related to debt securities reversed against interest income for the three and six months ended June 30, 2022 and 2021.

Accounting Pronouncements Adopted in 2021 and Accounting Pronouncements Pending Adoption

Accounting Standards Adopted in 2021

In August 2018, the FASB issued ASU 2018-14, "Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans." ASU 2018-14 amends ASC 715-20, "Compensation - Retirement Benefits - Defined Benefit Plans - General." The amended guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans by removing and adding certain disclosures for these plans. The eliminated disclosures include (a) the amounts in accumulated Other Comprehensive Income expected to be recognized in net periodic benefit costs over the next fiscal year, and (b) the effects of a one percentage point change in assumed health care cost trend rates on the net periodic benefit costs and the benefit obligation for post-retirement health care benefits. Additional disclosures include descriptions of significant gains and losses affecting the benefit obligation for the period. ASU 2018-14 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures.

In December 2019, the FASB issued ASU 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes." These amendments remove specific exceptions to the general principles in Topic 740 in GAAP. It eliminates the need for an organization to analyze whether the following apply in a given period: exception to the incremental approach for intraperiod tax allocation; exceptions to accounting for basis differences where there are ownership changes in foreign investments; and exception in interim period income tax accounting for year-to-date losses that exceed anticipated losses. It also improves financial statement preparers' application of income tax- related guidance and simplifies GAAP for: franchise taxes that are partially based on income; transactions with a government that result in a step up in the tax basis of goodwill; separate financial statements of legal entities that are not subject to tax; and enacts changes in tax laws in interim periods. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption is permitted. ASU 2019-12 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures.

In January 2020, the FASB issued 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." ASU 2020-01 represents changes to clarify certain interactions between the guidance to account for certain equity securities under Topic 321, the guidance to account for investments under the equity method of accounting in Topic 323, and the guidance in Topic 815. These amendments improve current U.S. GAAP by reducing diversity in practice and increasing comparability of the accounting for these transactions. ASU 2020-01 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures.

In October 2020, the FASB issued ASU 2020-08, "Codification Improvements to Subtopic 310-20, Receivables - Nonrefundable Fees and Other Costs." ASU 2020-08 clarifies that an entity should reevaluate whether a callable debt security is within the scope of paragraph 310-20-35-33 for each reporting period. ASU 2020-08 was effective for the Corporation on January 1, 2021 and did not have a material impact on its consolidated financial statements and related disclosures.

In August 2021, FASB issued ASU 2021-06, "Presentation of Financial Statements (Topic 205), Financial Services—Depository and Lending (Topic 942), and Financial Services—Investment Companies (Topic 946)." ASU 2021-06 updates the codification to align with SEC Final Rule Releases No. 33-10786 and No. 33-10835. Specific to financial institutions, these SEC releases updated required annual statistical disclosures. The amendments in ASU 2021-06 were effective immediately. The updates to the statistical disclosures are reflected in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2021, to align with this guidance.

Accounting Pronouncements Pending Adoption

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." ASU 2020-04 provides optional expedients and exceptions for accounting related to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 applies only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform and 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. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Corporation is currently evaluating the effect of the reference rate reform on its consolidated financial statements.

In January 2021, the FASB issued ASU 2021-01, "Reference Rate Reform (Topic 848)." ASU 2021-01 expands and clarifies the scope of ASU No. 2020-04 to include derivatives affected by changes in interest rates used for margining, discounting, or contract price alignment, commonly referred to as the “discounting transaction.” Derivatives impacted by the discounting transaction will be eligible for certain optional expedients and exceptions related to contract modifications and hedge accounting as defined in Topic 848. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Corporation is currently evaluating the effect of the reference rate reform on its consolidated financial statements and related disclosures.

In March 2022, the FASB issued ASU No. 2022-02, "Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures." This ASU eliminates the separate recognition and measurement guidance for Troubled Debt Restructurings ("TDRs") by creditors. The elimination of the TDR guidance may be adopted prospectively for loan modifications after adoption or on a modified retrospective basis, which would also apply to loans previously modified, resulting in a cumulative effect adjustment to retained earnings in the period of adoption for changes in the allowance for credit losses. This guidance is effective for the Corporation for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. The Corporation is evaluating the effect that ASU 2022-02 will have on its consolidated financial statements and related disclosures.

In June 2022, FASB issued ASU No. 2022-03, "Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions." In this ASU, a contractual restriction on the sale of an equity security is not considered in measuring the security's fair value. The ASU also requires certain disclosures for equity securities that are subject to contractual restrictions. This guidance is effective for the Corporation for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years, with early adoption permitted. The Corporation is evaluating the effect that ASU 2022-03 will have on its consolidated financial statements and related disclosures.