Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Consolidated Financial Statements of the Corporation have been prepared in conformity with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities as of the date of the financial statements as well as revenues and expenses during the period. Actual results could differ from those estimates. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. These Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto included in the Corporation's Annual Report on Form 10-K for the year ended December 31, 2022. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. The Corporation evaluates subsequent events through the date of filing of this Quarterly Report on Form 10-Q with the SEC. Significant Accounting Policies The significant accounting policies used in preparation of the Consolidated Financial Statements are disclosed in the Corporation's 2022 Annual Report on Form 10-K. Those significant accounting policies are unchanged at September 30, 2023 except for the following: Effective January 1, 2023, the Corporation adopted ASU 2022-02 Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures ("ASU 2022-02"), which updated the guidance on modifications to financing receivables by effectively replacing the concept of troubled debt restructurings with a new concept, loan modifications to borrowers experiencing financial difficulty. See Note 5 - "Loans and Allowance for Credit Losses" for further detail. Below is a summary of the policy surrounding loan modifications to borrowers experiencing financial difficulty. A loan modified for a borrower experiencing financial difficulty includes one or more of the following concessions: a reduction of the stated interest rate of the loan, an extension of the term or amortization period of the loan, a more than insignificant payment delay or principal forgiveness of the loan. Because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the ACL, a change to the ACL is generally not recorded upon modification. When principal forgiveness is provided, the amortized cost basis of the forgiven portion of the loan is written off against the ACL. The amount of the principal forgiveness is deemed to be uncollectible; therefore, that portion of the loan is written off, resulting in a reduction of the amortized cost basis of the loan and a corresponding adjustment to the ACL. Recently Adopted Accounting Standards In March 2022, FASB issued ASU 2022-01 Derivatives and Hedging (Topic 815): Fair Value Hedging - Portfolio Layer Method ("ASU 2022-01"). This update addresses questions regarding the last-of-layer method arising from the issuance of ASU 2017-12 and permits more flexibility in hedging interest rate risk for both variable-rate and fixed-rate financial instruments and introduces the ability to hedge risk components for non-financial hedges. The Corporation adopted ASU 2022-01 on January 1, 2023 and it did not have a material impact on its consolidated financial statements. In March 2022, FASB issued ASU 2022-02 Financial Instruments - Credit Losses (Topic 326) ("ASU 2022-02"). This update reduces the complexity of accounting for TDRs by eliminating certain accounting guidance, enhancing disclosures and improving the consistency of vintage disclosures. The Corporation adopted ASU 2022-02 on January 1, 2023 and it did not have a material impact on its consolidated financial statements. In September 2022, FASB issued ASU 2022-04 Liabilities - Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations ("ASU 2022-04"). This update enhances transparency in the disclosure of supplier finance programs, which previously had no explicit requirements under GAAP. The Corporation adopted ASU 2022-04 on January 1, 2023 and it did not have a material impact on its consolidated financial statements. In December 2022, FASB issued ASU 2022-06 Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848. This update extends the sunset provision date of ASU 2020-04 Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ("ASU 2020-04") to December 31, 2024. The Corporation will adopt ASU 2020-04 on January 1, 2025. The Corporation does not expect the adoption of ASU 2020-04 to have a material impact on its consolidated financial statements. In March 2023, FASB issued ASU 2023-02 Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method ("ASU 2023-02"). This update allows any tax credit program that meets certain criteria to use the proportional amortization method. The Corporation early adopted ASU 2023-02 using the modified retrospective method effective upon issuance, and it did not have a material impact on its consolidated financial statements. In July 2023, FASB issued ASU 2023-03 Presentation of Financial Statements (Topic 205), Income Statement - Reporting Comprehensive Income (Topic 220), Distinguishing Liabilities from Equity (Topic 480), Equity (Topic 505), and Compensation - Stock Compensation (Topic 718): Amendments to SEC Paragraphs Pursuant to SEC SAB No. 120, SEC Staff Announcement at the March 24, 2022 EITF Meeting, and SAB Topic 6.B, Accounting Series Release 280 - General Revision of Regulation S-X: Income or Loss Applicable to Common Stock ("ASU 2023-03"). This update amends certain SEC paragraphs from the Codification in response to (1) the issuance of SEC SAB 120; (2) the SEC staff announcement at the March 24, 2022, EITF meeting; and (3) SAB Topic 6.B, "Accounting Series Release No. 280 - General Revision of Regulation S-X: Income or Loss Applicable to Common Stock." ASU 2023-03 does not provide any new guidance so there is no transition or effective date associated with it. In August 2023, FASB issued ASU 2023-04 Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC SAB No. 121 ("ASU 2023-04"). This update adjusts language in FASB ASC 405-10 to align with SEC SAB No. 121 relating to accounting for obligations to safeguard crypto-assets an entity holds for its platform users. ASU 2023-24 does not provide any new guidance so there is no transition or effective date associated with it. The Corporation currently does not have obligations to safeguard crypto-assets. Recently Issued Accounting Standards In June 2022, FASB issued ASU 2022-03 Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions ("ASU 2022-03"). This update clarifies how the fair value of equity securities subject to contractual sale restrictions is determined and requires additional qualitative and quantitative disclosures for equity securities with contractual sale restrictions. The Corporation will adopt ASU 2022-03 on January 1, 2024. The Corporation does not expect the adoption of ASU 2022-03 to have a material impact on its consolidated financial statements. In March 2023, FASB issued ASU 2023-01 Leases (Topic 842): Common Control Arrangements ("ASU 2023-01"). This update clarifies guidance for leases between related parties under common control. The Corporation will adopt ASU 2023-01 on January 1, 2024. The Corporation does not expect the adoption of ASU 2023-01 to have a material impact on its consolidated financial statements. Reclassifications Certain amounts in the 2022 consolidated financial statements and notes have been reclassified to conform to the 2023 presentation.