SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2019
Accounting Policies [Abstract]
Organization	Organization The Corporation, through its wholly-owned subsidiaries, the Bank and CFS, provides a wide range of banking, financing, fiduciary and other financial services to its clients. The Corporation and the Bank are subject to the regulations of certain federal and state agencies and undergo periodic examinations by those regulatory authorities. CRM, a wholly-owned subsidiary of the Corporation, which was formed and began operations on May 31, 2016, is a Nevada-based captive insurance company which insures against certain risks unique to the operations of the Corporation and its subsidiaries and for which insurance may not be currently available or economically feasible in today's insurance marketplace. CRM pools resources with several other similar insurance company subsidiaries of financial institutions to spread a limited amount of risk among themselves. CRM is subject to regulations of the State of Nevada and undergoes periodic examinations by the Nevada Division of Insurance.
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in conformity with GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Article 10 of Regulation S-X of the Exchange Act. These financial statements include the accounts of the Corporation and its subsidiaries, and all significant intercompany balances and transactions are eliminated in consolidation. Amounts in the prior periods' consolidated financial statements are reclassified whenever necessary to conform to the current period's presentation. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and disclosures provided, and actual results could differ. In the opinion of management, all adjustments (consisting of normal recurring adjustments) and disclosures necessary for the fair presentation of the accompanying consolidated financial statements have been included. The unaudited consolidated financial statements should be read in conjunction with the Corporation's 2018 Annual Report on Form 10-K for the year ended December 31, 2018. The results of operations for any interim periods are not necessarily indicative of the results which may be expected for the entire year or any other period.
Reclassifications	Reclassifications Some items in the prior year financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or shareholders' equity.
Recent Accounting Pronouncements and Adoption of New Accounting Standards	Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The objective of the ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date by replacing the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to form credit loss estimates. The amendments in this ASU are effective for public companies for fiscal years beginning after December 15, 2019, though entities may adopt the amendments earlier for fiscal years beginning after December 15, 2018. In October 2019, the FASB voted to delay the effective date of ASU 2016-13 to January 2023 for certain entities, including certain Securities and Exchange Commission filers, public business entities, and private companies. As a smaller reporting company, the Corporation is eligible for the delay and plans to implement the standard effective January 2023. The Corporation anticipates that the adoption of the CECL model will result in an increase to the Corporation's allowance for loan losses. The Corporation has established a committee to oversee the implementation of CECL and has selected a vendor to assist in the implementation process. In 2018, the committee began establishing parameters which will be used in the CECL model with the selected vendor. The Corporation is running its current incurred loss model and a CECL model concurrently. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The objective of the ASU is to simplify the manner in which an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Additionally, the ASU removes the requirement for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails such qualitative test, to perform Step 2 of the goodwill impairment test. The amendments in this ASU are effective for annual, or any interim, goodwill impairment tests in fiscal years beginning after December 15, 2019. The adoption of the ASU is not expected to have a significant impact on the Corporation's consolidated financial statements. Adoption of New Accounting Standards On January 1, 2018, the Corporation adopted ASU 2014-09 Revenue from Contracts with Customers (Topic 606) and all subsequent amendments to the ASU (collectively, "ASU 606"), which creates a single framework for recognizing revenue from contracts with customers that fall within its scope and revises when it is appropriate to recognize a gain (loss) from the transfer of nonfinancial assets, such as OREO. The majority of the Corporation's revenues come from interest income and other sources, including loans, securities, and derivatives that are outside the scope of ASC 606. The Corporation's services that fall within the scope of ASC 606 are presented within non-interest income and are recognized as revenue as the Corporation satisfies its obligation to the customer. Services within the scope of ASC 606 include service charges on deposits, interchange income, wealth management fees, and the sale of OREO. The amendments allow for one of two transition methods: full retrospective or modified retrospective. The full retrospective approach requires application to all periods presented. The modified retrospective transition requires application to uncompleted contracts at the date of adoption. Periods prior to the date of adoption are not retrospectively revised, but a cumulative effect is recognized at the date of initial application on uncompleted contracts. The Corporation adopted the new revenue guidance using the modified retrospective approach. There was no significant change upon adoption of the standard, as the new standard did not materially change the way the Corporation currently records revenue for its WMG and deposit related fees at the Bank; as such, no cumulative effect adjustment was recorded. Refer to Note 10 - Revenue from Contracts with Customers for further discussion on the Corporation's accounting policies for revenue sources within the scope of ASC 606. On January 1, 2018, the Corporation adopted ASU 2016-01, an amendment to Recognition and Measurement of Financial Assets and Financial Liabilities ("ASC 825"). The objectives of the ASC 825 were (1) require equity investments to be measured at fair value, with changes in fair value recognized in net income, (2) simplify the impairment assessment of equity investments without readily determinable fair values, (3) eliminate the requirement to disclose methods and significant assumptions used to estimate fair value for financial instruments measured at amortized cost on the balance sheet, (4) require the use of the exit price notion when measuring the fair value of financial instruments, and (5) clarify the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. The Corporation adopted all provisions of this ASU using the modified retrospective method. The adjustments to opening retained earnings and accumulated other comprehensive loss related to the adoption of ASC 825 are immaterial to the financial statements. On January 1, 2018, the Corporation adopted ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The objective of the ASU is to reduce the existing diversity in practice relating to eight specific cash flow issues: (1) debt prepayment or debt extinguishment costs, (2) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (3) contingent consideration payments made after a business combination, (4) proceeds from the settlement of insurance claims, (5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (6) distributions received from equity method investees, (7) beneficial interests in securitization transactions, and (8) separately identifiable cash flows and application of the predominance principal. The adoption of ASU 2016-15 did not result in a change to how the Corporation accounts for its cash flows. On January 1, 2018, the Corporation adopted ASU 2017-07, Compensation - Retirement Benefits - Improving the Presentation of Net Periodic Cost and Net Periodic Postretirement Benefit Cost ("ASC 715"). The objective of ASC 715 was to improve guidance related to the presentation of defined benefit costs in the income statement. Specifically, ASC 715 required that an employer report the service cost component in the same line item(s) as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. Additionally, ASC 715 allows only the service cost component to be eligible for capitalization, when applicable. Results for reporting periods beginning after January 1, 2018 are presented under ASC 715, while prior period amounts continue to be reported in accordance with legacy GAAP, with comparable periods presented retrospectively for the presentation of the service cost and net periodic postretirement benefit cost in the income statement. The Corporation elected the practical expedient, which permits employers to use the amounts disclosed in its pension and other postretirement benefit plan note for the prior comparative periods as the estimation for applying retrospective presentation requirements. On January 1, 2019, the Corporation adopted ASU 2016-02, Leases (Topic 842). ASU 2016-02 requires companies that lease valuable assets to recognize on their balance sheets the assets and liabilities generated by contracts longer than a year. The Corporation adopted the new lease guidance using the modified retrospective approach and elected the transition option issued under ASU 2018-11, Leases (Topic 842) Targeted Improvements, allowing entities to continue to apply the legacy guidance in ASC 840, Leases, to prior periods, including disclosure requirements. Accordingly, prior period financial results and disclosures have not been adjusted. In addition, the Corporation elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Corporation to carry forward the historical lease classification. Adoption of the new standard resulted in the recording of operating lease right-of-use assets and operating lease liabilities of approximately $8.6 million as of January 1, 2019. The standard did not materially impact our consolidated net earnings and had no impact on cash flows. On January 1, 2019, the Corporation adopted ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. The objective of the ASU is to align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities. The amendment requires that the premium be amortized to the earliest call date, but does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The adoption of the ASU did not have a significant impact on the Corporation's consolidated financial statements.
Earnings Per Common Share	Basic earnings per share is net income divided by the weighted average number of common shares outstanding during the period. Issuable shares, including those related to directors’ restricted stock units and directors’ stock compensation, are considered outstanding and are included in the computation of basic earnings per share. All outstanding unvested share based payment awards that contain rights to non-forfeitable dividends are considered participating securities for this calculation. Restricted stock awards are grants of participating securities and are considered outstanding at grant date. Earnings per share information is adjusted to present comparative results for stock splits and stock dividends that occur.
Fair Value Measurement	Fair value is the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair value: Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a reporting entity's own assumptions about the assumptions that market participants would use in pricing an asset or liability. The Corporation used the following methods and significant assumptions to estimate fair value on a recurring basis: Available for Sale Securities: The fair values of securities available for sale are usually determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs), or matrix pricing, which is a mathematical technique widely used to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities' relationship to other benchmark quoted securities (Level 2 inputs). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows or other market indicators (Level 3 inputs). Equity Investments: Securities that are held to fund a deferred compensation plan and securities that have a readily determinable fair market value, are recorded at fair value with changes in fair value included in earnings. The fair values of equity investments are determined by quoted market prices (Level 1 inputs). Impaired Loans: At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Impaired loans carried at fair value have been partially charged-off or receive specific allocations as part of the allowance for loan loss accounting. For collateral dependent loans, fair value is commonly based on real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, typically resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted accordingly. OREO: Assets acquired through or instead of loan foreclosures are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Appraisals for both collateral-dependent impaired loans and OREO are performed by certified general appraisers (commercial properties) or certified residential appraisers (residential properties) whose qualifications and licenses have been reviewed and verified by the Corporation. Once received, appraisals are reviewed for reasonableness of assumptions, approaches utilized, Uniform Standards of Professional Appraisal Practice and other regulatory compliance, as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. Appraisals are generally completed within the previous 12 month period prior to a property being placed into OREO. On impaired loans, appraisal values are adjusted based on the age of the appraisal, the position of the lien, the type of the property and its condition. Derivatives: The fair values of interest rate swaps are based on valuation models using observable market data as of the measurement date (Level 2 inputs). Derivatives are traded in an over-the-counter market where quoted market prices are not always available. Therefore, the fair values of derivatives are determined using quantitative models that utilize multiple market inputs. The inputs will vary based on the type of derivative, but could include interest rates, prices, and indices to generate continuous yield or pricing curves, prepayment rates, and volatility factors to value the position. The Corporation also incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counter-party's nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Corporation has considered the impact of any applicable credit enhancements, such as collateral postings. Although the Corporation has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize credit default rate assumptions (Level 3 inputs).