| **GENERAL (Policies)**                                                              | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   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| **Organization, Consolidation and Presentation of Financial Statements [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   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| Financial Statement Preparation                                                     | Financial Statement PreparationThe Consolidated Condensed Balance Sheet of the Corporation as of December 31, 2022, has been derived from the audited consolidated balance sheet of the Corporation as of that date.  Certain information and note disclosures normally included in the Corporation’s annual financial statements, prepared in accordance with accounting principles generally accepted in the United States of America, have been condensed or omitted.  These consolidated condensed financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2022 filed with the Securities and Exchange Commission.  The results of operations for the three and nine months ended September 30, 2023, are not necessarily indicative of the results to be expected for the year.  Reclassifications have been made to prior financial statements to conform to the current financial statement presentation.  These reclassifications had no effect on net income.  Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for credit losses and fair value of financial instruments.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       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| Recent Accounting Changes Adopted in 2023                                           | Recent Accounting Changes Adopted in 2023FASB Accounting Standards Updates - No. 2020-04 - Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial ReportingSummary - The FASB issued ASU No. 2020-04 to provide temporary optional guidance to ease the potential burden in accounting for reference rate reform. LIBOR and other interbank offered rates are widely used benchmarks or reference rates in the United States and globally. Trillions of dollars in loans, derivatives, and other financial contracts reference LIBOR, the benchmark interest rate banks use to make short-term loans to each other.  With global capital markets expected to move away from LIBOR and other interbank offered rates and move toward rates that are more observable or transaction based and less susceptible to manipulation, the FASB launched a broad project in late 2018 to address potential accounting challenges expected to arise from the transition.  The new guidance provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The ASU is intended to help stakeholders during the global market-wide reference rate transition period. With the issuance of ASU 2022-06 - Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, the sunset date for adoption of ASU 2020-04 was extended from December 31, 2022 to December 31, 2024.  The Corporation adopted the expedients included in this ASU in the second quarter of 2023 as it transitioned its loans and other financial instruments to another reference rate.  FASB Accounting Standards Updates - No. 2021-01 - Reference Rate Reform (Topic 848): Scope Summary - The FASB has published ASU 2021-01, Reference Rate Reform, which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The ASU also amends the expedients and exceptions in Topic 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition.If an entity elects to apply any of the amendments in this Update for an eligible hedging relationship, any adjustments as a result of those elections must be reflected as of the date the entity applies the election.With the issuance of ASU 2022-06 - Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, the sunset date for adoption of ASU 2021-01 was extended from December 31, 2022 to December 31, 2024.  The Corporation adopted the expedients included in this ASU in the second quarter of 2023 as it transitioned its loans and other financial instruments to another reference rate.  FASB Accounting Standards Updates - No. 2021-08 -Business Combinations (Topic 805) - Accounting for Contract Assets and Contract Liabilities from Contracts with CustomersSummary -The FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, that addressed diversity in practice related to the accounting for revenue contracts with customers acquired in a business combination.Under existing GAAP, an acquirer generally recognized assets acquired and liabilities assumed in a business combination, including contract assets and contract liabilities arising from revenue contracts with customers and other similar contracts that are accounted for in accordance with Topic 606, Revenue from Contracts with Customers, at fair value on the acquisition date.The FASB indicated that some stakeholders indicated that it is unclear how an acquirer should evaluate whether to recognize a contract liability from a revenue contract with a customer acquired in a business combination after Topic 606 was adopted. Furthermore, it was identified that under current practice, the timing of payment (payment terms) of a revenue contract may subsequently affect the post-acquisition revenue recognized by the acquirer. To address this, the ASU required entities to apply Topic 606 to recognize and measure contract assets and contract liabilities in a business combination.  Finally, the amendments in the ASU improve comparability after the business combination by providing consistent recognition and measurement guidance for revenue contracts with customers acquired in a business combination and revenue contracts with customers not acquired in a business combination.For public business entities, the amendments were effective for fiscal years beginning after December 31, 2022, including interim periods within those fiscal years.  For all other entities, the amendments are effective for fiscal years beginning after December 31, 2023, including interim periods within those fiscal years.  The amendments in this Update are applied prospectively to business combinations occurring on or after the effective date of the amendments.  Early adoption of the amendments was permitted, including adoption in an interim period.  An entity that early adopted in an interim period applied the amendments (1) retrospectively to all business combinations for which the acquisition date occurred on or after the beginning of the fiscal year that included the interim period or early application, and (2) prospectively to all business combinations that occurred on or after the date of initial application.  The Corporation adopted this guidance on January 1, 2023, but adoption of the standard did not have any impact on the Corporation's financial statements or disclosures.FASB Accounting Standards Updates - No. 2022-02 - Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage DisclosuresSummary - The FASB issued ASU No. 2022-02, Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures, to improve the usefulness of information provided to investors about certain loan refinancings, restructurings, and writeoffs.Troubled Debt Restructurings ("TDR") by Creditors That Have Adopted CECLDuring the FASB’s post-implementation review of the credit losses standard, including a May 2021 roundtable, investors and other stakeholders questioned the relevance of the TDR designation and the usefulness of disclosures about those modifications. Some noted that measurement of expected losses under the CECL model already incorporated losses realized from restructurings that are TDRs and that relevant information for investors would be better conveyed through enhanced disclosures about certain modifications.The amendments in the new ASU eliminate the accounting guidance for TDRs by creditors that have adopted CECL while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors made to borrowers experiencing financial difficulty.Vintage Disclosures - Gross WriteoffsThe disclosure of gross writeoff information by year of origination was cited by numerous investors as an essential input to their analysis. To address this feedback, the amendments in the new ASU require that a public business entity disclose current-period gross writeoffs by year of origination for financing receivables and net investment in leases.For entities that have adopted the amendments in ASU 2016-13, the amendments in this Update were effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years.  The Corporation adopted this Update on January 1, 2023 and the new disclosures required in this Update are included in NOTE 4. LOANS AND ALLOWANCE of these Notes to Consolidated Condensed Financial Statements.New Accounting Pronouncements Not Yet AdoptedThe Corporation continually monitors potential accounting pronouncements and the following pronouncements have been deemed to have the most applicability to the Corporation's financial statements:FASB Accounting Standards Updates - No. 2023-02 - Investments - Equity Method and Joint Ventures (Topic 323) - Accounting for Investments in Tax Credit Structures Using the Proportional Amortization MethodSummary -The FASB issued ASU No. 2023-02, Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method, that is intended to improve the accounting and disclosures for investments in tax credit structures. The ASU is a consensus of the FASB’s Emerging Issues Task Force ("EITF").The ASU allows reporting entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. The ASU responds to stakeholder feedback that the proportional amortization method provides investors and other allocators of capital with a better understanding of the returns from investments that are made primarily for the purpose of receiving income tax credits and other income tax benefits.Reporting entities were previously permitted to apply the proportional amortization method only to qualifying tax equity investments in low-income housing tax credit (LIHTC) structures. In recent years, stakeholders asked the FASB to extend the application of the proportional amortization method to qualifying tax equity investments that generate tax credits through other programs, which resulted in the EITF addressing this issue.For public business entities, the amendments are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. For all other entities, the amendments are effective for fiscal years beginning after December 15, 2024, including interim periods within those fiscal years. Early adoption is permitted for all entities in any interim period.  The Corporation is assessing the terms of this guidance, but adoption of the standard is not expected to have a significant impact on the Corporation's financial statements or disclosures. |

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