Chemung Financial (CHMG) 10-K 24 Mar 21 2020 FY Annual report Financial data

COVER

COVER - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 12, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	0-13888
Entity Registrant Name	CHEMUNG FINANCIAL CORP
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	16-1237038
Entity Address, Address Line One	One Chemung Canal Plaza
Entity Address, City or Town	Elmira
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	14901
City Area Code	607
Local Phone Number	737-3711
Title of 12(b) Security	Common Stock, Par Value $0.01 Per Share
Trading Symbol	CHMG
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 103,726,256
Entity Common Stock, Shares Outstanding		4,661,598
Documents Incorporated by Reference	Portions of the Proxy Statement for the Annual Meeting of Shareholders to be held on June 8, 2021 are incorporated by reference into Part III, Items 10, 11, 12, 13, and 14 of this Form 10-K.
Entity Central Index Key	0000763563
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from financial institutions	$ 29,467	$ 25,203
Interest-earning deposits in other financial institutions	79,071	96,701
Total cash and cash equivalents	108,538	121,904
Equity investments, at fair value	2,542	2,174
Securities available for sale, at estimated fair value	554,611	284,090
Securities held to maturity	2,469	3,115
FHLBNY and FRBNY Stock, at cost	3,150	3,099
Loans, net of deferred loan fees	1,536,463	1,309,219
Allowance for loan losses	(20,924)	(23,478)
Total ending loans balance	1,515,539	1,285,741
Loans held for sale	170	1,185
Premises and equipment, net	20,119	22,417
Operating lease right-of-use assets	7,145	8,001
Goodwill	21,824	21,824
Other intangible assets, net	258	742
Bank owned life insurance	3,059	3,111
Accrued interest and other assets	40,027	30,424
Total assets	2,279,451	1,787,827
Deposits:
Non-interest-bearing	620,423	468,238
Interest-bearing	1,417,351	1,103,900
Total deposits	2,037,774	1,572,138
Capital lease obligation	3,849	4,085
Operating lease liabilities	7,264	8,084
Dividends payable	1,214	1,263
Accrued interest payable and other liabilities	29,651	19,630
Total liabilities	2,079,752	1,605,200
Shareholders' equity:
Common stock, value	53	53
Additional-paid-in capital	46,764	46,382
Retained earnings	168,006	153,701
Treasury stock, value	(17,525)	(11,710)
Accumulated other comprehensive loss	2,401	(5,799)
Total shareholders' equity	199,699	182,627
Total liabilities and shareholders' equity	$ 2,279,451	$ 1,787,827

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Securities held to maturity, estimated fair value	$ 2,501	$ 3,139
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,310,076	5,310,076
Treasury stock, at cost (in shares)	642,239	452,641

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest and Dividend Income:
Loans, including fees	$ 59,089	$ 58,245	$ 57,840
Taxable securities	6,004	5,265	4,804
Tax exempt securities	1,060	1,152	1,153
Interest-earning deposits	754	2,270	756
Total interest and dividend income	66,907	66,932	64,553
Interest Expense:
Deposits	3,827	6,173	3,323
Securities sold under agreements to repurchase	0	0	137
Borrowed funds	161	148	613
Total interest expense	3,988	6,321	4,073
Net interest income	62,919	60,611	60,480
Provision for loan losses	4,239	5,945	3,153
Net interest income after provision for loan losses	58,680	54,666	57,327
Non-Interest Income:
Net gains on securities transactions	0	19	0
Change in fair value of equity investments	89	81	2,004
Net gain on sales of loans held for sale	1,730	248	351
Net gains (losses) on sales of other real estate owned	(79)	(99)	90
Income from bank owned life insurance	161	63	66
Other	2,529	1,694	2,479
Total non-interest income	21,124	20,073	23,074
Non-Interest Expenses:
Salaries and wages	24,250	23,420	22,322
Pension and other employee benefits	5,553	5,902	5,524
Other components of net periodic pension cost (benefit)	(1,017)	(541)	(770)
Net occupancy expenses	5,885	5,969	6,550
Furniture and equipment expenses	2,078	2,497	2,550
Data processing expense	7,576	7,386	6,997
Professional services	1,725	1,885	2,169
Legal accruals and settlements	0	0	989
Amortization of intangible assets	484	609	734
Marketing and advertising expense	631	932	1,181
Other real estate owned expenses	102	115	422
FDIC insurance	987	537	1,142
Loan expense	1,173	787	863
Other	6,508	6,198	6,093
Total non-interest expenses	55,935	55,696	56,766
Income before income tax expense	23,869	19,043	23,635
Income tax expense	4,607	3,434	4,009
Net income	$ 19,262	$ 15,609	$ 19,626
Weighted average shares outstanding (in shares)	4,802	4,869	4,832
Basic and diluted earnings per share (in dollars per share)	$ 4.01	$ 3.21	$ 4.06
WMG
Non-Interest Income:
Revenues from contracts with customer	$ 9,492	$ 9,503	$ 9,317
Service Charge on Deposits
Non-Interest Income:
Revenues from contracts with customer	3,134	4,460	4,727
Interchange Revenue
Non-Interest Income:
Revenues from contracts with customer	$ 4,068	$ 4,104	$ 4,040

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 19,262	$ 15,609	$ 19,626
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available for sale	10,415	8,053	(1,382)
Reclassification adjustment gains realized in net income	0	19	0
Net unrealized gains (losses)	10,415	8,072	(1,382)
Tax effect	(2,656)	(2,058)	353
Net of tax amount	7,759	6,014	(1,029)
Change in funded status of defined benefit pension plan and other benefit plans:
Net gain (loss) arising during the period	506	(626)	(711)
Reclassification adjustment for amortization of prior service benefit	(220)	(220)	(220)
Prior service credit	0	0	0
Reclassification adjustment for partial pension settlement loss included in pension expense	0	0	828
Reclassification adjustment for amortization of net actuarial losses	300	312	318
Total before tax effect	586	(534)	215
Tax effect	(145)	132	(55)
Net of tax amount	441	(402)	160
Total other comprehensive income (loss)	8,200	5,612	(869)
Comprehensive income	$ 27,462	$ 21,221	$ 18,757

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common StockCumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in CapitalCumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Retained EarningsCumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury StockCumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss)Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance at Dec. 31, 2017		$ 149,813		$ 149,651	$ 53	$ 53	$ 45,967	$ 45,967	$ 128,453		$ 128,493	$ (14,320)	$ (14,320)	$ (10,340)	$ (202)	$ (10,542)
Beginning balance (Accounting Standards Update 2016-01) at Dec. 31, 2017	[1]		$ (162)							$ 40					$ (202)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		19,626							19,626
Other comprehensive income (loss)		(869)												(869)
Restricted stock awards		405					405
Distribution of treasury stock for directors' deferred compensation plan		218					(722)					940
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0					(370)					370
Restricted stock units for directors' deferred compensation plan		67					67
Cash dividends declared		(4,990)							(4,990)
Distribution of shares of treasury stock for directors' compensation		301					147					154
Distribution of shares of treasury stock for employee compensation		89					44					45
Sale of shares of treasury stock	[1]	643					282					361
Repurchase of common stock		(112)										(112)
Ending balance at Dec. 31, 2018		165,029			53		45,820		143,129			(12,562)		(11,411)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		15,609							15,609
Other comprehensive income (loss)		5,612												5,612
Restricted stock awards		503					503
Distribution of treasury stock for directors' deferred compensation plan		13					(52)					65
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0					(353)					353
Restricted stock units for directors' deferred compensation plan		42					42
Cash dividends declared		(5,037)							(5,037)
Distribution of shares of treasury stock for directors' compensation		356					139					217
Distribution of shares of treasury stock for employee compensation		100					39					61
Sale of shares of treasury stock	[2]	585					244					341
Repurchase of common stock		(185)										(185)
Ending balance at Dec. 31, 2019		182,627			53		46,382		153,701			(11,710)		(5,799)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		19,262							19,262
Other comprehensive income (loss)		8,200												8,200
Restricted stock awards		672					672
Distribution of treasury stock for directors' deferred compensation plan		(14)					(182)					168
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0					(403)					403
Restricted stock units for directors' deferred compensation plan		29					29
Cash dividends declared		(4,957)							(4,957)
Distribution of shares of treasury stock for directors' compensation		350					145					205
Distribution of shares of treasury stock for employee compensation		101					42					59
Sale of shares of treasury stock	[2]	1,018					74					944
Repurchase of common stock		(7,589)										(7,589)
Forfeiture of restricted stock awards		0					5					(5)
Ending balance at Dec. 31, 2020		$ 199,699			$ 53		$ 46,764		$ 168,006			$ (17,525)		$ 2,401
[1]	Due to implementation of ASC 2016-01. See "Adoption of New Accounting Standards" discussion in Note 1.
[2]	All treasury stock sales were completed at the prevailing market price with the Chemung Canal Trust Company Profit Sharing, Savings, and Investment Plan which is a defined contribution plan sponsored by the Bank.

CONSOLIDATED STATEMENTS OF SH_2

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Distribution of shares of treasury stock for directors' deferred compensation (in shares)	6,426	2,551	36,681
Distribution of shares of treasury stock granted for employee restricted stock awards (in shares)	14,805	13,692	14,425
Cash dividends declared (in dollars per share)	$ 1.04	$ 1.04	$ 1.04
Distribution of shares of treasury stock for directors' compensation (in shares)	7,923	8,465	6,015
Distribution of shares of treasury stock for employee compensation (in shares)	2,274	2,373	1,784
Sale of shares of treasury stock (in shares)	36,104	13,270	14,081
Purchase of shares of treasury stock (in shares)	257,018	4,148	2,736
Restricted stock awards, forfeited (in shares)	112

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 19,262	$ 15,609	$ 19,626
Adjustments to reconcile net income to net cash provided by operating activities:
Operating Lease, Right-Of-Use Asset, Amortization	856	712	0
Amortization of intangible assets	484	609	734
Deferred income tax (benefit) expense	(86)	(1,564)	2,153
Provision for loan losses	4,239	5,945	3,153
Loss on disposal of fixed assets	247	334	10
Depreciation and amortization of fixed assets	2,918	3,112	3,437
Amortization of premiums on securities, net	1,842	1,055	1,304
Gains on sales of loans held for sale, net	(1,730)	(248)	(351)
Proceeds from sales of loans held for sale	47,996	12,488	18,262
Loans originated and held for sale	(45,251)	(12,923)	(17,871)
Net (gains) losses on sale of other real estate owned	46	99	(90)
Write-downs on OREO	38	53	14
Net change in fair value of equity investments	(89)	(81)	(2,004)
Net gains on securities transactions	0	(19)	0
Proceeds from sales of trading assets	91	22	2,288
Purchase of trading assets	(370)	(206)	(167)
(Increase) decrease in other assets	(9,883)	(1,945)	(2,651)
Increase (decrease) in accrued interest payable	(37)	67	84
Expense related to restricted stock units for directors' deferred compensation plan	29	42	67
Expense related to employee stock compensation	101	100	89
Expense related to employee restricted stock awards	672	503	405
Payments on operating leases	(820)	(629)	0
Increase (decrease) in other liabilities	8,265	3,333	(654)
Income from bank owned life insurance	(161)	(63)	(66)
Net cash provided by operating activities	28,659	26,405	27,772
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	0	33,690	0
Proceeds from maturities, calls, and principal paydowns on securities available for sale	67,888	49,665	64,180
Proceeds from maturities and principal collected on securities held to maturity	2,007	2,903	1,316
Purchases of securities available for sale	(329,836)	(118,151)	(16,033)
Purchases of securities held to maturity	(1,361)	(1,143)	(2,410)
Purchase of FHLBNY and FRBNY stock	(51)	(14)	(22,003)
Redemption of FHLBNY and FRBNY stock	0	53	24,649
Purchases of premises and equipment	(867)	(883)	(1,770)
Proceeds from sale of other real estate owned	627	458	1,709
Proceeds from sale of loans	5,227	0	0
Proceeds from bank owned life insurance	213	0	0
Net (increase) decrease in loans	(239,695)	711	(5,719)
Net cash (used by) provided by investing activities	(495,848)	(32,711)	43,919
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in demand deposits, interest-bearing demand accounts, savings accounts, and insured money market accounts	341,081	(8,050)	69,927
Net increase in time deposits	124,555	10,951	31,864
Net decrease in securities sold under agreements to repurchase	0	0	(10,000)
Net change in FHLBNY overnight advances	0	0	(57,700)
Repayments of FHLBNY long term advances	0	0	(2,000)
Principal payments made on capital lease	(236)	(219)	(213)
Purchase of treasury stock	(7,589)	0	0
Sale of treasury stock	1,018	585	643
Cash dividends paid	(5,006)	(5,029)	(4,969)
Net cash (used in) provided by financing activities	453,823	(1,762)	27,552
Net increase (decrease) in cash and cash equivalents	(13,366)	(8,068)	99,243
Cash and cash equivalents, beginning of period	121,904	129,972	30,729
Cash and cash equivalents, end of period	108,538	121,904	129,972
Cash paid during the year for:
Interest	4,025	6,254	3,989
Income Taxes	6,005	4,455	1,730
Supplemental disclosure of non-cash activity:
Transfer of loans to other real estate owned	431	517	267
Dividends declared, not yet paid	1,214	1,263	1,254
Repurchase of common stock in lieu of employee payroll taxes	(238)	(185)	(112)
Distribution of treasury stock for directors' deferred compensation plan	(14)	13	218
Distribution of treasury stock for directors' compensation	350	356	301
Forfeiture of shares of restricted stock awards	$ (5)	$ 0	$ 0

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ORGANIZATION The Corporation, through its wholly owned subsidiaries, the Bank and CFS Group, Inc., provides a wide range of banking, financing, fiduciary and other financial services to its clients. The Corporation is subject to the regulations of certain federal and state agencies and undergoes periodic examinations by those regulatory agencies. 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 The accompanying consolidated financial statements have been prepared in conformity with GAAP and include the accounts of the Corporation and its subsidiaries. All significant intercompany balances and transactions are eliminated in consolidation. 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. CASH AND CASH EQUIVALENTS Cash and cash equivalents include cash and amounts due from banks and demand interest-bearing deposits with other financial institutions. Time deposits with other financial institutions are classified as held-to-maturity securities and are not included in cash and cash equivalents. EQUITY INVESTMENTS On January 1, 2018, the Corporation adopted ASU 2016-01, an amendment to Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10) , which requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. The adoption of this guidance resulted in a $40 thousand increase to beginning retained earnings and a $202 thousand decrease to beginning accumulated other comprehensive income (loss). Securities that are held to fund a non-qualified deferred compensation plan and securities that have a readily determinable fair market value, are recorded at fair value with changes in fair value and interest and dividend income included in earnings. SECURITIES Management determines the appropriate classification of securities at the time of purchase. If management has the intent and the Corporation has the ability at the time of purchase to hold securities until maturity, they are classified as held to maturity and carried at amortized cost. Securities to be held for indefinite periods of time or not intended to be held to maturity are classified as available for sale and carried at fair value. Unrealized holding gains and losses on securities classified as available for sale are excluded from earnings and are reported as accumulated other comprehensive income (loss) in shareholders' equity, net of the related tax effects, until realized. Realized gains and losses are determined using the specific identification method. Management evaluates securities for OTTI on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. For equity securities, the entire amount of impairment is recognized through earnings. In order to determine OTTI for purchased beneficial interests that, on the purchase date, were not highly rated, the Corporation compares the present value of the remaining cash flows as estimated at the preceding evaluation date to the current expected remaining cash flows. OTTI is deemed to have occurred if there has been an adverse change in the remaining expected future cash flows. Premiums and discounts are amortized or accreted over the life of the related security as an adjustment of yield using the interest method. Dividend and interest income is recognized when collected. FEDERAL HOME LOAN BANK AND FEDERAL RESERVE BANK STOCK The Bank is a member of both the FHLBNY and the FRBNY. FHLBNY members are required to own a certain amount of stock based on the level of borrowings and other factors, while FRBNY members are required to own a certain amount of stock based on a percentage of the Bank’s capital stock and surplus. FHLBNY and FRBNY stock are carried at cost and classified as non-marketable equities and periodically evaluated for impairment based on ultimate recovery of par value. Cash dividends are reported as income. LOANS Loans are stated at the amount of unpaid principal balance net of deferred loan fees. Additionally, recorded investment in loans includes interest receivable on loans. The Corporation has the ability and intent to hold its loans for the foreseeable future. The Corporation’s loan portfolio is comprised of the following segments: (i) commercial and agricultural, (ii) commercial mortgages, (iii) residential mortgages, and (iv) consumer loans. Commercial and agricultural loans primarily consist of loans to small to mid-sized businesses in the Corporation’s market area in a diverse range of industries. These loans are typically made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. Commercial mortgage loans are generally non-owner occupied commercial properties or owner occupied commercial real estate with larger balances. Repayment of these loans is often dependent upon the successful operation and management of the properties and the businesses occupying the properties, as well as on the collateral securing the loan. Residential mortgage loans are generally made on the basis of the borrower’s ability to make repayment from their employment and other income, but are secured by real property. Consumer loans include home equity lines of credit and home equity loans, which exhibit many of the same characteristics as residential mortgages. Indirect and other consumer loans are typically secured by depreciable assets, such as automobiles or boats, and are dependent on the borrower’s continuing financial stability. Interest on loans is accrued and credited to operations using the interest method. Past due status is based on the contractual terms of the loan. The accrual of interest is generally discontinued and previously accrued interest is reversed when loans become 90 days delinquent. Loans may also be placed on non-accrual status if management believes such classification is otherwise warranted. All payments received on non-accrual loans are applied to principal. Loans are returned to accrual status when they become current as to principal and interest and remain current for a period of six consecutive months or when, in the opinion of management, the Corporation expects to receive all of its original principal and interest. Loan origination fees and certain direct loan origination costs are deferred and amortized over the life of the loan as an adjustment to yield, using the interest method. TROUBLED DEBT RESTRUCTURINGS A TDR is a formally renegotiated loan in which the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that would not have been granted to the borrower otherwise. Not all loans that are restructured as a TDR are classified as non-accrual before the restructuring occurs. Restructured loans can convert from non-accrual to accrual status when said loans have demonstrated performance, generally evidenced by six months of payment performance in accordance with the restructured terms and when, in the opinion of management, the Bank expects to receive all of its contractual principal and interest due under the restructured terms. TDRs are individually evaluated for impairment and included in the separately identified impairment disclosures. TDRs are measured at the present value of estimated future cash flows using the loan's effective rate at inception. If a TDR is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. For TDRs that subsequently default, the Bank determines the amount of the allowance on that loan in accordance with the accounting policy for the allowance for loan losses on loans individually identified as impaired. The Bank incorporates recent historical experience related to TDRs, including the performance of TDRs that subsequently default, into the calculation of the allowance by loan portfolio segment. Section 4013 of the CARES Act, signed into law of March 27, 2020, gives entities temporary relief from the accounting and disclosure requirements for troubled debt restructurings (TDRs) under ASC 310-40, Receivables: Troubled Debt Restructurings by Creditors, in certain situations. Section 4013 of the CARES Act permits the suspension of ASC 310-40 for loan modifications that are made by financial institutions in response to the COVID-19 pandemic if (1) the borrower was not more than 30 days past due as of December 31, 2019, and (2) the modifications are related to arrangements that defer or delay the payment of principal or interest, or change the interest rate on the loan. All loan modifications made by the Corporation in response to the COVID-19 pandemic have been in accordance with Section 4013 of the CARES Act. ALLOWANCE FOR LOAN LOSSES The allowance is an amount that management believes will be adequate to absorb probable incurred credit losses on existing loans. The allowance is established based on management’s evaluation of the probable incurred credit losses in our portfolio in accordance with GAAP, and is comprised of both specific valuation allowances and general valuation allowances. A loan is classified as impaired when, based on current information and events, it is probable that the Bank will be unable to collect both the principal and interest due under the contractual terms of the loan agreement. Specific valuation allowances are established based on management’s analysis of individually impaired loans. Factors considered by management in determining impairment include payment status, evaluations of the underlying collateral, expected cash flows, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. If a loan is determined to be impaired and is placed on nonaccrual status, all future payments received are applied to principal and a portion of the allowance is allocated so that the loan is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. The general component covers non-impaired loans and is based on historical loss experience adjusted for current factors. Loans not impaired but classified as substandard and special mention use a historical loss factor on a rolling five year history of net losses. For all other unclassified loans, the historical loss experience is determined by portfolio class and is based on the actual loss history experienced by the Bank over the most recent two years. This actual loss experience is supplemented with other qualitative factors based on the risks present for each portfolio class. These qualitative factors include consideration of the following: (1) lending policies and procedures, including underwriting standards and collection, charge-off and recovery policies, (2) national and local economic and business conditions and developments, including the condition of various market segments, (3) loan profiles and volume of the portfolio, (4) the experience, ability, and depth of lending management and staff, (5) the volume and severity of past due, classified and watch-list loans, non-accrual loans, troubled debt restructurings, and other modifications (6) the quality of the Bank’s loan review system and the degree of oversight by the Bank’s Board of Directors, (7) collateral related issues: secured vs. unsecured, type, declining valuation environment and trend of other related factors, (8) the existence and effect of any concentrations of credit, and changes in the level of such concentrations, (9) the effect of external factors, such as competition and legal and regulatory requirements, on the level of estimated credit losses in the Bank’s current portfolio and (10) the impact of the global economy. The allowance for loan losses is increased through a provision for loan losses charged to operations. Loans are charged against the allowance for loan losses when management believes that the collectability of all or a portion of the principal is unlikely. Management's evaluation of the adequacy of the allowance for loan losses is performed on a periodic basis and takes into consideration such factors as the credit risk grade assigned to the loan, historical loan loss experience and review of specific impaired loans. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in economic conditions. LOANS HELD FOR SALE Certain mortgage loans are originated with the intent to sell. The Bank typically retains the right to service the mortgages upon sale. Loans held for sale are recorded at the lower of cost or fair value in the aggregate and are regularly evaluated for changes in fair value. Commitments to sell the loans that are originated for sale are recorded at fair value. If necessary, a valuation allowance is established with a charge to income for unrealized losses attributable to a change in market rates. CAPITAL LEASES Capital leases are recorded at the lesser of the present value of future cash outlays using a discounted cash flow, or fair value at the beginning of the lease term. Initially, the capital lease is recorded as a building asset, which is depreciated over the shorter of the term of the lease or the estimated life of the asset, and a corresponding long term lease obligation, which amortizes as payments are made toward the lease. Interest expense is also incurred using the discount rate determined at the beginning of the lease term. PREMISES AND EQUIPMENT Land is carried at cost, while buildings, equipment, leasehold improvements and furniture are stated at cost less accumulated depreciation and amortization. Depreciation is charged to current operations under the straight-line method over the estimated useful lives of the assets, which range from 15 to 50 years for buildings and from 3 to 10 years for equipment and furniture. Amortization of leasehold improvements and leased equipment is recognized on the straight-line method over the shorter of the lease term or the estimated life of the asset. Leases of branch offices, which have been capitalized, are included within buildings and depreciated on the straight-line method over the shorter of the lease term or the estimated life of the asset. BANK OWNED LIFE INSURANCE BOLI is recorded at the amount that can be realized under the insurance contracts at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Changes in the cash surrender value are recorded in other income. OTHER REAL ESTATE Real estate acquired through foreclosure or deed in lieu of foreclosure is recorded at estimated fair value of the property less estimated costs to dispose at the time of acquisition to establish a new carrying value. Write downs from the carrying value of the loan to estimated fair value which are required at the time of foreclosure are charged to the allowance for loan losses. Subsequent adjustments to the carrying values of such properties resulting from declines in fair value are charged to operations in the period in which the declines occur. INCOME TAXES The Corporation files a consolidated tax return. Deferred tax assets and liabilities are recognized for future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and for unused tax loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates to apply to taxable income in the years in which temporary differences are expected to be recovered or settled, or the tax loss carry forwards are expected to be utilized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is "more likely than not" that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the "more likely than not" test, no tax benefit is recorded. WEALTH MANAGEMENT GROUP FEE INCOME Assets held in a fiduciary or agency capacity for customers are not included in the accompanying consolidated balance sheets, since such assets are not assets of the Corporation. Wealth Management Group income is recognized on the accrual method as earned based on contractual rates applied to the balances of individual trust accounts. The unaudited market value of trust assets under administration total $2.091 billion, including $305.5 million of assets held under management or administration for the Corporation, at December 31, 2020 and $1.915 billion, including $289.7 million of assets held under management or administration for the Corporation, at December 31, 2019. POSTRETIREMENT BENEFITS Pension Plan: The Chemung Canal Trust Company Pension Plan is a non-contributory defined benefit pension plan. The Pension Plan is a “qualified plan” under the IRS Code and therefore must be funded. Contributions are deposited to the Plan and held in trust. The Plan assets may only be used to pay retirement benefits and eligible plan expenses. The plan was amended such that new employees hired on or after July 1, 2010 would not be eligible to participate in the plan, however, existing participants at that time would continue to accrue benefits. Under the Plan, pension benefits are based upon final average annual compensation where the annual compensation is total base earnings paid plus 401(k) salary deferrals. Bonuses, overtime, commissions and dividends are excluded. The normal retirement benefit equals 1.2% of final average compensation (highest consecutive five years of annual compensation in the prior ten years) times years of service (up to a maximum of 25 years), plus 1% of average monthly compensation for each additional year of service (up to a maximum of 10 years), plus 0.65% of average monthly compensation in excess of covered compensation for each year of credited service up to 35 years. Covered compensation is the average of the social security taxable wage base in effect for the 35 year period prior to normal social security retirement age. Compensation for purposes of determining benefits under the Plan is reviewed annually. On October 20, 2016, the Corporation amended its noncontributory defined benefit pension plan (“pension plan”) to freeze future retirement benefits after December 31, 2016. Beginning on January 1, 2017, both the pay-based and service-based component of the formula used to determine retirement benefits in the pension plan were frozen so that participants will no longer earn further retirement benefits. During the fourth quarter of 2018, the Corporation offered terminated, vested employees the option to receive lump sum settlement payments. The effects of these changes are reflected in the pension plan disclosures as of December 31, 2018. See Note 14 for further details. Defined Contribution Profit Sharing, Savings and Investment Plan: The Corporation also sponsors a 401(K) defined contribution profit sharing, savings and investment plan which covers all eligible employees. The Corporation contributes a non-discretionary 3% of gross annual wages (as defined by the 401(k) plan) for each participant, regardless of the participant’s deferral, in addition to a 50% match up to 6% of gross annual wages. All contributions made on or after January 1, 2017 will vest immediately, while all previous contributions continue vesting on a five-year vesting schedule. The plan's assets consist of Chemung Financial Corporation common stock, as well as other common and preferred stocks, U.S. Government securities, corporate bonds and notes, and mutual funds. The plan’s expense is the amount of non-discretionary and matching contributions and is charged to non-interest expenses in the consolidated statements of income. Defined Benefit Health Care Plan: The Corporation sponsors a defined benefit health care plan that provides postretirement medical benefits to employees who meet minimum age and service requirements. This plan was amended effective July 1, 2006. Prior to this amendment, all retirees age 55 or older were eligible for coverage under the Corporation's self-insured health care plan, contributing 40% of the cost of the coverage. Under the amended plan, coverage for Medicare eligible retirees who reside in the Central New York geographic area is provided under a group sponsored plan with Excellus BlueCross BlueShield called Medicare Blue PPO, with the retiree paying 100% of the premium. Excellus BlueCross BlueShield assumes full liability for the payment of health care benefits incurred after July 1, 2006. Current Medicare eligible retirees who reside outside of the Central New York geographic area were eligible for coverage under the Corporation's self-insurance plan through December 31, 2009, contributing 50% of the cost of coverage. Effective January 1, 2010, these out of area retirees were eligible for coverage under a Medicare Supplement Plan C administered by Excellus BlueCross BlueShield, contributing 50% of the premium. Current retirees between the ages of 55 and 65, will continue to be eligible for coverage under the Corporation's self-insured plan, contributing 50% of the cost of the coverage. Employees who retired after July 1, 2006, and become Medicare eligible will only have access to the Medicare Blue PPO plan. Additionally, effective July 1, 2006, dental benefits were eliminated for all retirees. The cost of the plan is based on actuarial computations of current and future benefits for employees, and is charged to non-interest expenses in the consolidated statements of income. On October 20, 2016, the Corporation amended its defined benefit health care plan to not allow any new retirees into the plan, effective January 1, 2017. The effects of this freeze are reflected in the pension plan disclosures as of December 31, 2019 and 2018. See Note 14. Executive Supplemental Pension Plan: U.S. laws place limitations on compensation amounts that may be included under the Pension Plan. The Executive Supplemental Pension Plan was provided to executives in order to produce total retirement benefits, as a percentage of compensation that is comparable to employees whose compensation is not restricted by the annual compensation limit. Pension amounts, which exceed the applicable Internal Revenue Service code limitations, will be paid under the Executive Supplemental Pension Plan. The Executive Supplemental Pension Plan is a “non-qualified plan” under the Internal Revenue Service Code. Contributions to the Plan are not held in trust; therefore, they may be subject to the claims of creditors in the event of bankruptcy or insolvency. When payments come due under the Plan, cash is distributed from general assets. The cost of the plan is based on actuarial computations of current and future benefits for executives, and is charged to non-interest expense in the consolidated statements of income. Defined Contribution Supplemental Executive Retirement Plan: The Defined Contribution Supplemental Executive Retirement Plan is provided to certain executives to motivate and retain key management employees by providing a nonqualified retirement benefit that is payable at retirement, disability, death and certain other events. The Supplemental Executive Retirement Plan is intended to be an unfunded plan maintained primarily for the purpose of providing deferred compensation benefits for a select group of management or highly compensated employees under Sections 201(2), 301(a)(3) and 401(a)(1) of the Employee Retirement Income Security Act of 1974. The plan’s expense is the Corporation’s annual contribution plus interest credits. STOCK-BASED COMPENSATION Restricted Stock Plan: The Restricted Stock Plan is designed to align the interests of the Corporation’s executives and senior managers with the interests of the Corporation and its shareholders, to ensure the Corporation’s compensation practices are competitive and comparable with those of its peers, and to promote the retention of select management-level employees. Under the terms of the Plan, the Corporation may make discretionary grants of restricted shares of the Corporation’s common stock to or for the benefit of employees selected to participate in the Plan. Each officer of the Corporation, other than the Corporation’s chief executive officer, is eligible to participate in the Plan. Awards are based on the performance, responsibility and contributions of the employee and are targeted at an average of the peer group. The maximum number of shares of the Corporation’s common stock that may be awarded as restricted shares to Plan participants may not exceed 15,000 per calendar year. Twenty percent of the restricted stock awarded to a participant vests each year commencing with the first anniversary date of the award and is 100 percent vested on the fifth anniversary date. Except in the case of the participant’s death, disability, or in the event of a change in control, the participant’s unvested shares of unrestricted stock will be forfeited if the participant leaves the employment of the Bank, or if the participant retires prior to attainment of age 65, unless otherwise waived by the Compensation and Personnel Committee of the Board of Directors. The plan’s expense is recognized as compensation expense ratably over the vesting period for the fair value of the award, measured at the grant date. See Note 15 for more information regarding this Plan. Deferred Directors Fee Plan: A Deferred Directors Fee Plan for non-employee directors provides that directors may elect to defer receipt of all or any part of their fees. Deferrals are either credited with interest compounded quarterly at the Applicable Federal Rate for short-term debt instruments or converted to units, which appreciate or depreciate, as would an actual share of the Corporation’s common stock purchased on the deferral date. Cash deferrals will be paid into an interest bearing account and paid in cash. Units will be paid in shares of common stock. All directors’ fees are charged to non-interest expenses in the consolidated statements of income. Directors’ Compensation Plan: The purpose of the Directors’ Compensation Plan is to enable the Corporation to attract and retain persons of exceptional ability to serve as directors and stockholders in enhancing the value of the common stock of the Corporation. The Plan was originally established to provide for the cash payment of an annual retainer and fees to non-employee directors serving on the Board of Directors of the Corporation and the Bank. The Plan was subsequently amended to provide: (i) payment of additional compensation to each non-employee director in shares of the Corporation’s common stock in an amount equal to the total cash compensation earned by each non-employee director during the year for service on the Board of Directors of each of the Corporation and the Bank, and for each year of service thereafter, to be distributed from treasury shares in January of the following calendar year; and (ii) payment to the President and CEO of the Corporation and the Bank for his service on the Boards of Directors of the Corporation and the Bank in an amount equal in value to the average cash compensation awarded to non-employee directors who have served twelve st of the calendar year. The cost of all cash and stock compensation is charged to non-interest expenses in the consolidated statements of income. In 2019, the annual cash retainer paid to each non-employee director of the Corporation was increased by $6,000 to $11,500 and $19,250 for the Chairman of the Board. The retainer for the Chairman of the Audit Committee was also increased by an additional $2,875 to $14,375. The directors waived their right to stock compensation for the additional retainer fees paid. Incentive Compensation Plan: The purpose of the Incentive Compensation Plan is to attract and retain highly qualified officers and key employees, and to motivate such persons to serve the Corporation and the Bank and to expend maximum effort to improve the business results and earnings of the Corporation by providing to such persons an opportunity to acquire or increase a direct proprietary interest in the operations and future success of the Corporation. To this end, the Incentive Compensation Plan provides for the discretionary grant of cash and/or unrestricted stock, i.e., common stock of the Corporation that is free of any restrictions, such as restrictions on transferability, to select officers and key employees as designated by the Board of Directors in its sole discretion. The maximum number of shares that can be awarded as unrestricted stock under the Incentive Compensation Plan to any individual is 10,000 per calendar year; and the maximum amount that may be earned in cash as an Incentive Award in any calendar year by any individual is $300,000. The right of any eligible employee to receive a grant of an incentive award, whether in the form of cash or unrestricted stock, is subject to performance standards that are specified by either the Compensation Committee or the Board of Directors. The cost of all cash and unrestricted stock compensation is charged to non-interest expenses in the consolidated statements of income. Non-qualified Deferred Compensation Plan: The Deferred Compensation Plan allows a select group of management and employees to defer all or a portion of their annual compensation to a future date. Eligible employees are generally highly compensated employees and are designated by the Board of Directors from time to time. Investments in the plan are recorded as equity investments and deferred amounts are an unfunded liability of the Corporation. The plan r

RESTRICTIONS ON CASH AND DUE FR

RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS	12 Months Ended
	Dec. 31, 2020
RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS [Abstract]
RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS	RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS The Corporation was in compliance with the reserve requirement with the Federal Reserve Bank of New York as of December 31, 2020. The Corporation also maintains a pre-funded settlement account with a financial institution in the amount of $1.6 million for electronic funds transaction settlement purposes at December 31, 2020 and 2019.

SECURITIES

SECURITIES	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
SECURITIES	SECURITIES Amortized cost and estimated fair value of securities available for sale at December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Mortgage-backed securities, residential $ 458,245 $ 467,866 $ 225,029 $ 225,234 Obligations of states and political subdivisions 40,662 43,405 41,265 42,845 Corporate bonds and notes 9,000 9,035 250 250 SBA loan pools 34,455 34,305 15,712 15,761 Total $ 542,362 $ 554,611 $ 282,256 $ 284,090 Gross unrealized gains and losses on securities available for sale at December 31, 2020 and 2019, were as follows (in thousands): 2020 2019 Unrealized Unrealized Unrealized Unrealized Mortgage-backed securities, residential $ 9,822 $ 201 $ 1,471 $ 1,266 Obligations of states and political subdivisions 2,743 — 1,580 — Corporate bonds and notes 47 12 — — SBA loan pools 42 192 95 46 Total $ 12,654 $ 405 $ 3,146 $ 1,312 The amortized cost and estimated fair value of debt securities available for sale are shown below by contractual maturity. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately (in thousands): December 31, 2020 Amortized Fair Within one year After one, but within five years 27,215 28,757 After five, but within ten years 21,688 22,875 After ten years 759 808 Mortgage-backed securities, residential 458,245 467,866 SBA loan pools 34,455 34,305 Total $ 542,362 $ 554,611 Actual maturities may differ from contractual maturities above because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. The proceeds from sales and calls of securities resulting in gains or losses are listed below (in thousands): 2020 2019 2018 Proceeds $ — $ 8,513 $ — Gross gains $ — $ 159 $ — Gross losses $ — $ (140) $ — Tax expense $ — $ 5 $ — Amortized cost and estimated fair value of securities held to maturity at December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Obligations of states and political subdivisions $ 326 $ 326 $ 1,045 $ 1,045 Time deposits with other financial institutions 2,143 2,175 2,070 2,094 $ 2,469 $ 2,501 $ 3,115 $ 3,139 Gross unrealized gains and losses on securities held to maturity at December 31, 2020 and 2019, were as follows (in thousands): 2020 2019 Unrealized Unrealized Unrealized Unrealized Obligations of states and political subdivisions $ — $ — $ — $ — Time deposits with other financial institutions 32 — 24 — Total $ 32 $ — $ 24 $ — There were no sales of securities held to maturity in 2020 or 2019. The contractual maturity of securities held to maturity is as follows at December 31, 2020 (in thousands): December 31, 2020 Amortized Fair Within one year $ 856 $ 863 After one, but within five years 1,613 1,638 After five, but within ten years — — After ten years — — Total $ 2,469 $ 2,501 The following table summarizes the investment securities available for sale with unrealized losses at December 31, 2020 and December 31, 2019 by aggregated major security type and length of time in a continuous unrealized position (in thousands): Less than 12 months 12 months or longer Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized 2020 Obligations of U.S. Government and U.S. Government sponsored enterprises $ — $ — $ — $ — $ — $ — Mortgage-backed securities, residential 70,037 200 970 1 71,007 201 Obligations of states and political subdivisions — — — — — — Corporate bonds and notes 2,988 12 — — 2,988 12 SBA loan pools 15,245 156 3,636 36 18,881 192 Total temporarily impaired securities $ 88,270 $ 368 $ 4,606 $ 37 $ 92,876 $ 405 Less than 12 months 12 months or longer Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized 2019 Obligations of U.S. Government and U.S. Government sponsored enterprises $ — $ — $ — $ — $ — $ — Mortgage-backed securities, residential 71,506 791 54,343 $ 475 125,849 1,266 Obligations of states and political subdivisions — — — — — — Corporate bonds and notes — — — — — — SBA loan pools 3,014 9 1,405 37 4,419 46 Total temporarily impaired securities $ 74,520 $ 800 $ 55,748 $ 512 $ 130,268 $ 1,312 Other-Than-Temporary-Impairment As of December 31, 2020, the majority of the Corporation’s unrealized losses in the investment securities portfolio related to mortgage-backed securities. At December 31, 2020, all of the unrealized losses related to mortgage-backed securities were issued by U.S. government sponsored entities, Fannie Mae and Freddie Mac. Because the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Corporation does not have the intent to sell these securities and it is not likely that it will be required to sell these securities before their anticipated recovery, the Corporation does not consider these securities to be other-than-temporarily impaired at December 31, 2020. Pledged Securities The fair value of securities pledged to secure public funds on deposit or for other purposes as required by law was $180.8 million at December 31, 2020 and $205.9 million at December 31, 2019. There are no securities pledged to secure securities sold under agreements to repurchase at December 31, 2020 and 2019, respectively. Concentrations There are no securities of a single issuer (other than securities of U.S. Government sponsored enterprises) that exceed 10% of shareholders' equity at December 31, 2020 or 2019. Equity Method Investments The Corporation has an equity investment in Cephas Capital Partners, L.P. This small business investment company was established for the purpose of providing financing to small businesses in market areas served by the Corporation, including minority-owned small businesses and those that are anticipated to create jobs for the low to moderate income levels in the targeted areas. As of December 31, 2020 and 2019, this investment totaled $0.2 million and $0.3 million respectively, is included in other assets, and is accounted for under the equity method of accounting.

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	12 Months Ended
	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
LOANS AND ALLOWANCE FOR LOAN LOSSES	LOANS AND ALLOWANCE FOR LOAN LOSSES The composition of the loan portfolio, net of deferred loan fees is summarized as follows (in thousands): December 31, 2020 December 31, 2019 Commercial and agricultural: Commercial and industrial $ 368,663 $ 230,018 Agricultural 283 274 Commercial mortgages: Construction 61,945 43,962 Commercial mortgages 654,663 604,832 Residential mortgages 239,401 188,338 Consumer loans: Home equity lines and loans 78,547 91,784 Indirect consumer loans 120,538 134,973 Direct consumer loans 12,423 15,038 Total loans, net of deferred loan fees 1,536,463 1,309,219 Interest receivable on loans 5,035 3,684 Total recorded investment in loans $ 1,541,498 $ 1,312,903 Residential mortgages held for sale as of December 31, 2020 and 2019 totaling $0.2 million and $1.2 million, respectively, are not included in the above table. Residential mortgages totaling $101.9 million at December 31, 2020 and $170.0 million at December 31, 2019 were pledged under a blanket collateral agreement for the Corporation's line of credit with the FHLBNY. As of December 31, 2020, the Corporation had outstanding loan balances of $150.9 million for PPP loans which are included in commercial and industrial loans in the table above. These loans require no allowance for loan losses as of December 31, 2020 since they are government guaranteed loans. The following tables present the activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018, respectively (in thousands): December 31, 2020 Allowance for loan losses Commercial, and Agricultural Commercial Mortgages Residential Mortgages Consumer Loans Total Beginning balance: $ 10,227 $ 8,869 $ 1,252 $ 3,130 $ 23,478 Charge Offs: (4,068) (2,143) (56) (1,113) (7,380) Recoveries: 89 14 86 398 587 Net (charge offs) recoveries (3,979) (2,129) 30 (715) (6,793) Provision (1,755) 4,756 797 441 4,239 Ending balance $ 4,493 $ 11,496 $ 2,079 $ 2,856 $ 20,924 December 31, 2019 Allowance for loan losses Commercial, and Agricultural Commercial Mortgages Residential Mortgages Consumer Loans Total Beginning balance: $ 5,383 $ 8,184 $ 1,226 $ 4,151 $ 18,944 Charge Offs: (312) (1) (151) (1,511) (1,975) Recoveries: 59 4 45 456 564 Net recoveries (charge offs) (253) 3 (106) (1,055) (1,411) Provision 5,097 682 132 34 5,945 Ending balance $ 10,227 $ 8,869 $ 1,252 $ 3,130 $ 23,478 December 31, 2018 Allowance for loan losses Commercial, and Agricultural Commercial Mortgages Residential Mortgages Consumer Loans Total Beginning balance: $ 6,976 $ 8,514 $ 1,316 $ 4,355 $ 21,161 Charge Offs: (3,644) (213) (226) (1,836) (5,919) Recoveries: 47 3 5 494 549 Net recoveries (charge offs) (3,597) (210) (221) (1,342) (5,370) Provision 2,004 (120) 131 1,138 3,153 Ending balance $ 5,383 $ 8,184 $ 1,226 $ 4,151 $ 18,944 The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2020 and December 31, 2019 (in thousands): December 31, 2020 Allowance for loan losses Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Ending allowance balance attributable to loans: Individually evaluated for impairment $ 1,401 $ 74 $ — $ 52 $ 1,527 Collectively evaluated for impairment 3,092 11,422 2,079 2,804 19,397 Total ending allowance balance $ 4,493 $ 11,496 $ 2,079 $ 2,856 $ 20,924 December 31, 2019 Allowance for loan losses Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Ending allowance balance attributable to loans: Individually evaluated for impairment $ 6,000 $ 2,097 $ — $ — $ 8,097 Collectively evaluated for impairment 4,227 6,772 1,252 3,130 15,381 Total ending allowance balance $ 10,227 $ 8,869 $ 1,252 $ 3,130 $ 23,478 December 31, 2020 Loans: Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Loans individually evaluated for impairment $ 3,400 $ 5,117 $ 1,271 $ 801 $ 10,589 Loans collectively evaluated for impairment 366,852 714,028 238,742 211,287 1,530,909 Total ending loans balance $ 370,252 $ 719,145 $ 240,013 $ 212,088 $ 1,541,498 December 31, 2019 Loans: Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Loans individually evaluated for impairment $ 6,147 $ 8,844 $ 525 $ 149 $ 15,665 Loans collectively evaluated for impairment 224,775 641,726 188,349 242,388 1,297,238 Total ending loans balance $ 230,922 $ 650,570 $ 188,874 $ 242,537 $ 1,312,903 The following tables present loans individually evaluated for impairment recognized by class of loans as of December 31, 2020 and December 31, 2019, the average recorded investment and interest income recognized by class of loans as of the years ended December 31, 2020, 2019 and 2018 (in thousands): December 31, 2020 December 31, 2019 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated With no related allowance recorded: Commercial and agricultural: Commercial and industrial $ 1,960 $ 1,963 $ — $ 133 $ 133 $ — Commercial mortgages: Construction 188 189 — 247 247 — Commercial mortgages 6,814 4,760 — 3,501 3,503 — Residential mortgages 1,283 1,271 — 554 525 — Consumer loans: Home equity lines and loans 645 631 — 171 149 — With an allowance recorded: Commercial and agricultural: Commercial and industrial 5,228 1,437 1,401 6,013 6,014 6,000 Commercial mortgages: Commercial mortgages 258 168 74 5,093 5,094 2,097 Consumer loans: Home equity lines and loans 170 170 52 — — — Total $ 16,546 $ 10,589 $ 1,527 $ 15,712 $ 15,665 $ 8,097 December 31, 2020 December 31, 2019 December 31, 2018 Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) With no related allowance recorded: Commercial and agricultural: Commercial and industrial $ 936 $ 16 $ 248 $ — $ 608 $ 12 Commercial mortgages: Construction 219 8 278 10 337 11 Commercial mortgages 4,103 16 3,605 12 4,193 21 Residential mortgages 952 25 422 44 416 7 Consumer loans: Home equity lines & loans 446 7 137 6 60 3 With an allowance recorded: Commercial and agricultural: Commercial and industrial 4,981 4 3,209 — 3,043 3 Commercial mortgages: Commercial mortgages 2,949 — 6,524 — 2,315 4 Consumer loans: Home equity lines and loans 104 — — — — — Total $ 14,690 $ 76 $ 14,423 $ 72 $ 10,972 $ 61 (1) Cash basis interest income approximates interest income recognized. The following tables present the recorded investment in non-accrual and loans past due 90 days or more and still accruing by class of loans as of December 31, 2020 and December 31, 2019 (in thousands): Non-accrual Loans Past Due 90 Days or More and Still Accruing 2020 2019 2020 2019 Commercial and agricultural: Commercial and industrial $ 2,167 $ 6,147 $ 2 $ 7 Commercial mortgages: Construction 55 80 — — Commercial mortgages 4,415 8,407 — — Residential mortgages 1,632 2,155 — — Consumer loans: Home equity lines and loans 1,159 641 — — Indirect consumer loans 519 571 — — Direct consumer loans 5 7 — — Total $ 9,952 $ 18,008 $ 2 $ 7 The following tables present the aging of the recorded investment in loans as of December 31, 2020 and December 31, 2019 (in thousands): December 31, 2020 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Loans Not Past Due Total Commercial and agricultural: Commercial and industrial $ 520 $ 14 $ 30 $ 564 $ 369,404 $ 369,968 Agricultural — — — — 284 284 Commercial mortgages: Construction — — — — 62,164 62,164 Commercial mortgages 1,438 3,696 308 5,442 651,539 656,981 Residential mortgages 817 406 461 1,684 238,329 240,013 Consumer loans: Home equity lines and loans 521 41 474 1,036 77,725 78,761 Indirect consumer loans 1,268 198 252 1,718 119,135 120,853 Direct consumer loans 34 2 — 36 12,438 12,474 Total $ 4,598 $ 4,357 $ 1,525 $ 10,480 $ 1,531,018 $ 1,541,498 December 31, 2019 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Loans Not Past Due Total Commercial and agricultural: Commercial and industrial $ 1,285 $ 49 $ 4,398 $ 5,732 $ 224,916 $ 230,648 Agricultural — — — — 274 274 Commercial mortgages: Construction — — — — 44,082 44,082 Commercial mortgages 440 277 2,165 2,883 603,605 606,488 Residential mortgages 1,016 803 956 2,775 186,099 188,874 Consumer loans: Home equity lines and loans 353 151 149 653 91,412 92,065 Indirect consumer loans 1,546 377 355 2,278 133,088 135,366 Direct consumer loans 32 11 6 49 15,057 15,106 Total $ 4,672 $ 1,668 $ 8,029 $ 14,370 $ 1,298,533 $ 1,312,903 Troubled Debt Restructurings: A modification of a loan may result in classification as a TDR when a borrower is experiencing financial difficulty and the modification constitutes a concession. The Corporation offers various types of modifications which may involve a change in the schedule of payments, a reduction in the interest rate, an extension of the maturity date, extending the maturity date at an interest rate lower than the current market rate for new debt with similar risk, requesting additional collateral, releasing collateral for consideration, substituting or adding a new borrower or guarantor, a permanent reduction of the recorded investment in the loan or a permanent reduction of the interest on the loan. Under Section 4013 of the CARES Act, loans less than 30 days past due as of December 31, 2019 will be considered current for COVID-19 related modifications and therefore will not be treated as TDRs. As of December 31, 2020, in conformance with Section 4013 of the CARES Act, the Corporation modified a total of 1,064 commercial and consumer loans represented by a total loan balance of $211.2 million. As of December 31, 2020, 31 loans totaling $20.8 million remained in modified status, of which 18 loans totaling $20.1 million had been modified more than once. As of December 31, 2020, 2019 and 2018, the Corporation has a recorded investment in TDRs of $6.7 million, $9.0 million, and $6.8 million, respectively. There were specific reserves of $0.4 million allocated for TDRs at December 31, 2020, and $2.3 million and $0.9 million allocated for December 31, 2019 and 2018, respectively. As of December 31, 2020, TDRs totaling $2.8 million were accruing interest under the modified terms and $3.9 million were on non-accrual status. As of December 31, 2019, TDRs totaling $0.9 million were accruing interest under the modified terms and $8.1 million were on non-accrual status. As of December 31, 2018, TDRs totaling $0.8 million were accruing interest under the modified terms and $6.0 million were on non-accrual status. The Corporation has committed no additional amounts to customers with outstanding loans that are classified as TDRs as of December 31, 2020, $17 thousand to customers with outstanding loans that are classified as TDRs as of December 31, 2019 and no additional amounts as of December 31, 2018. During the years ended December 31, 2020, 2019 and 2018, the terms of certain loans were modified as TDRs. During the year ended December 31, 2020, the modification of the terms of one residential mortgage loan included the postponement of scheduled amortized payments for a period of greater than three-months. Additionally, two commercial and industrial loans were modified with the maturity date extended on both loans and one with an extension at a stated rate lower than the current market rate for new debt with similar risk. Additionally, two commercial and industrial loans had payments deferred and both loans were risk rated Substandard while one loan was in non-accrual status prior to the modification. The modifications of four commercial mortgage loans included the deferral of payments with three of the loans risk rated Substandard and in non-accrual status, three of the borrowers were over one year past due in real estate taxes and two of the loans were over 30 days past due in payments. The modifications of three residential mortgages included the deferral of payments while all three were in non-accrual status prior to the modifications, two were risk rated Substandard and one was over 30 days past due in payments. The modifications of three home equity lines and loans included the deferral of payments while all three loans were risk rated Substandard and in non-accrual status prior to the modifications. During the year ended December 31, 2019, the modification of the terms of one commercial real estate term loan included a reduction of the scheduled amortized payments for greater than a three month period, and modification of the terms of one home equity loan included a reduction in the stated interest rate for the remaining life of the loan, an extension of the maturity date for approximately three years and a reduction of the scheduled amortized payment of the loan for greater than a three month period. Additionally, one residential mortgage loan modification included a reduction in the stated interest rate for the remaining life of the loan, a deferral of the principal balance decreasing the effective borrowing rate, an extension of the maturity date by thirteen years at a stated rate lower than the current market rate for new debt with similar risk and a postponement of the scheduled amortized payments of the loan for greater than a three month period During the year ended December 31, 2018, the modification of the terms of two commercial and industrial term loans included extensions of the maturity dates at stated rates of interest lower than current market rates for new debt with similar risks. The following table presents loans by class modified as troubled debt restructurings that occurred during the years ended December 31, 2020, 2019 and 2018 (in thousands): December 31, 2020 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings: Commercial and agricultural: Commercial and industrial 4 $ 2,068 $ 2,068 Commercial mortgages: Commercial mortgages 4 1,297 1,297 Residential mortgages 4 997 997 Consumer loans: Home equity lines and loans 3 738 738 Total 15 $ 5,100 $ 5,100 The TDRs described above increased the allowance for loan losses by $0.2 million and resulted in no charge offs during the year ended December 31, 2020. December 31, 2019 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings: Commercial mortgages: Commercial mortgages 1 4,223 4,223 Residential mortgages 1 123 123 Consumer loans: Home equity lines and loans 1 137 137 Total 3 $ 4,483 $ 4,483 The TDRs described above increased the allowance for loan losses by $1.7 million and resulted in no charge offs during the year ended December 31, 2019. December 31, 2018 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings: Commercial and agricultural: Commercial and industrial 2 $ 491 $ 491 Total 2 $ 491 $ 491 The TDRs described above increased the allowance for loan losses by $0.4 million and resulted in no charge offs during the year ended December 31, 2018. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. The following table presents loans by class modified as TDRs for which there was a payment default within twelve months following the modification during the year ended December 31, 2020: December 31, 2020 Number of Loans Recorded Investment Consumer loans: Home equity lines and loans 1 $ 170 Total 1 $ 170 There were no payment defaults on any loans previously modified as troubled debt restructurings during the years ended December 31, 2019 and 2018, within twelve months following the modification. Credit Quality Indicators The Corporation establishes a risk rating at origination for all commercial loans. The main factors considered in assigning risk ratings include, but are not limited to: historic and future debt service coverage, collateral position, operating performance, liquidity, leverage, payment history, management ability, and the customer’s industry. Commercial relationship managers monitor all loans in their respective portfolios for any changes in the borrower’s ability to service their debt and affirm the risk ratings for the loans at least annually. For the retail loans, which include residential mortgages, indirect and direct consumer loans, home equity lines and loans, and credit cards, once a loan is properly approved and closed, the Corporation evaluates credit quality based upon loan repayment. Retail loans are not rated until they become 90 days past due. The Corporation uses the risk rating system to identify criticized and classified loans. Commercial relationships within the criticized and classified risk ratings are analyzed quarterly. The Corporation uses the following definitions for criticized and classified loans (which are consistent with regulatory guidelines): Special Mention – Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or the institution’s credit position as some future date. Substandard – Loans classified as substandard are inadequately protected by the current net worth and paying capability of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Doubtful – Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans. Loans listed as not rated are included in groups of homogeneous loans. Based on the analyses performed as of December 31, 2020 and 2019, the risk category of the recorded investment of loans by class of loans is as follows (in thousands): December 31, 2020 Not Rated Pass Special Mention Substandard Doubtful Total Commercial and agricultural: Commercial and industrial $ — $ 360,500 $ 2,999 $ 5,092 $ 1,377 $ 369,968 Agricultural — 284 — — — 284 Commercial mortgages: Construction — 59,885 — 2,279 — 62,164 Commercial mortgages — 616,090 23,631 16,128 1,132 656,981 Residential mortgages 238,381 — 1,632 — 240,013 Consumer loans Home equity lines and loans 77,602 — — 1,159 — 78,761 Indirect consumer loans 120,334 — — 519 — 120,853 Direct consumer loans 12,470 — — 4 — 12,474 Total $ 448,787 $ 1,036,759 $ 26,630 $ 26,813 $ 2,509 $ 1,541,498 December 31, 2019 Not Rated Pass Special Mention Substandard Doubtful Total Commercial and agricultural: Commercial and industrial $ — $ 208,552 $ 5,915 $ 10,361 $ 5,820 $ 230,648 Agricultural — 274 — — — 274 Commercial mortgages: Construction — 40,304 168 3,610 — 44,082 Commercial mortgages — 577,266 12,451 12,356 4,415 606,488 Residential mortgages 186,719 — — 2,155 — 188,874 Consumer loans Home equity lines and loans 91,424 — — 641 — 92,065 Indirect consumer loans 134,795 — — 571 — 135,366 Direct consumer loans 15,099 — — 7 — 15,106 Total $ 428,037 $ 826,396 $ 18,534 $ 29,701 $ 10,235 $ 1,312,903 The Corporation considers the performance of the loan portfolio and its impact on the allowance for loan losses. For residential and consumer loan classes, the Corporation also evaluates credit quality based on the aging status of the loan, which was previously presented, and by payment activity. Non-performing loans include non-accrual loans and non-accrual troubled debt restructurings. The following table presents the recorded investment in residential and consumer loans based on payment activity as of December 31, 2020 and 2019 (in thousands): December 31, 2020 Consumer Loans Residential Mortgages Home Equity Lines and Loans Indirect Consumer Loans Other Direct Consumer Loans Performing $ 238,381 $ 77,602 $ 120,334 $ 12,470 Non-Performing 1,632 1,159 519 4 Total $ 240,013 $ 78,761 $ 120,853 $ 12,474 December 31, 2019 Consumer Loans Residential Mortgages Home Equity Lines and Loans Indirect Consumer Loans Other Direct Consumer Loans Performing $ 186,719 $ 91,424 $ 134,795 $ 15,099 Non-Performing 2,155 641 571 7 Total $ 188,874 $ 92,065 $ 135,366 $ 15,106

PREMISES AND EQUIPMENT

PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
PREMISES AND EQUIPMENT	PREMISES AND EQUIPMENT Premises and equipment at December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Land $ 4,803 $ 4,803 Buildings 41,957 41,408 Projects in progress 65 113 Equipment and furniture 37,183 37,007 Leasehold improvements 5,285 5,757 89,293 89,088 Less accumulated depreciation and amortization 69,174 66,671 Net book value $ 20,119 $ 22,417 Depreciation expense was $2.9 million, $3.1 million and $3.4 million for 2020, 2019, and 2018, respectively. Capital Leases The Corporation leases certain buildings under capital leases. The lease arrangements require monthly payments through 2036. The Corporation has included these leases in premises and equipment as follows: 2020 2019 Buildings $ 5,572 $ 5,572 Accumulated depreciation (1,875) (1,541) Net book value $ 3,697 $ 4,031

LEASES

LEASES	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
LEASES	LEASES Operating Leases The Corporation leases certain branch properties under long-term, operating lease agreements. The leases expire at various dates through 2033 and generally include renewal options. As of December 31, 2020, the weighted average remaining lease term was 10.3 years with a weighted average discount rate of 3.39%. Rent expense was $1.0 million, $1.0 million, and $1.1 million for the years ended December 31, 2020, 2019 and 2018, respectively. Certain leases provide for increases in future minimum annual rent payments as defined in the lease agreements. The Corporation’s operating lease agreements contain both lease and non-lease components, which are generally accounted for separately. The Corporation’s lease agreements do not contain any residual value guarantees. As a result of branch consolidation in November, 2020, the Corporation terminated its lease at 1054 State Route 17C, Owego, New York, releasing $0.2 million in future lease obligation. Leased branch properties at December 31, 2020 and December 31, 2019 consist of the following (in thousands): December 31, 2020 December 31, 2019 Operating lease right-of-use asset $ 8,001 $ 8,713 Less: accumulated amortization (705) (712) Less: Lease termination (151) — Operating lease right-of-use-assets, net $ 7,145 $ 8,001 The following is a schedule by year of the undiscounted cash flows of the operating lease liabilities, excluding CAM charges, as of December 31, 2020 (in thousands): Year Amount 2021 $ 907 2022 846 2023 866 2024 857 2025 841 2026 and thereafter 4,349 Total minimum lease payments 8,666 Less: amount representing interest (1,402) Present value of net minimum lease payments $ 7,264 As of December 31, 2020, the Corporation had no operating leases that were signed, but had not yet commenced. As of January 28, 2021, the Corporation entered into a three year lease agreement related to its new Western New York location, for which a $0.1 million future obligation and lease asset was recorded, effective March 1, 2021. Finance Leases The Corporation leases certain buildings under finance leases. The lease arrangements require monthly payments through 2036. As of December 31, 2020, the weighted average remaining lease term was 12.1 years with a weighted average discount rate of 3.36%. The Corporation has included these leases in premises and equipment as of December 31, 2020 and December 31, 2019. The following is a schedule by year of future minimum lease payments under the capitalized lease, together with the present value of net minimum lease payments as of December 31, 2020 (in thousands): Year Amount 2021 $ 388 2022 391 2023 391 2024 391 2025 409 2026 and thereafter 2,839 Total minimum lease payments 4,809 Less: amount representing interest (960) Present value of net minimum lease payments $ 3,849 As of December 31, 2020, the Corporation had no finance leases that were signed, but had not yet commenced.
LEASES	LEASES Operating Leases The Corporation leases certain branch properties under long-term, operating lease agreements. The leases expire at various dates through 2033 and generally include renewal options. As of December 31, 2020, the weighted average remaining lease term was 10.3 years with a weighted average discount rate of 3.39%. Rent expense was $1.0 million, $1.0 million, and $1.1 million for the years ended December 31, 2020, 2019 and 2018, respectively. Certain leases provide for increases in future minimum annual rent payments as defined in the lease agreements. The Corporation’s operating lease agreements contain both lease and non-lease components, which are generally accounted for separately. The Corporation’s lease agreements do not contain any residual value guarantees. As a result of branch consolidation in November, 2020, the Corporation terminated its lease at 1054 State Route 17C, Owego, New York, releasing $0.2 million in future lease obligation. Leased branch properties at December 31, 2020 and December 31, 2019 consist of the following (in thousands): December 31, 2020 December 31, 2019 Operating lease right-of-use asset $ 8,001 $ 8,713 Less: accumulated amortization (705) (712) Less: Lease termination (151) — Operating lease right-of-use-assets, net $ 7,145 $ 8,001 The following is a schedule by year of the undiscounted cash flows of the operating lease liabilities, excluding CAM charges, as of December 31, 2020 (in thousands): Year Amount 2021 $ 907 2022 846 2023 866 2024 857 2025 841 2026 and thereafter 4,349 Total minimum lease payments 8,666 Less: amount representing interest (1,402) Present value of net minimum lease payments $ 7,264 As of December 31, 2020, the Corporation had no operating leases that were signed, but had not yet commenced. As of January 28, 2021, the Corporation entered into a three year lease agreement related to its new Western New York location, for which a $0.1 million future obligation and lease asset was recorded, effective March 1, 2021. Finance Leases The Corporation leases certain buildings under finance leases. The lease arrangements require monthly payments through 2036. As of December 31, 2020, the weighted average remaining lease term was 12.1 years with a weighted average discount rate of 3.36%. The Corporation has included these leases in premises and equipment as of December 31, 2020 and December 31, 2019. The following is a schedule by year of future minimum lease payments under the capitalized lease, together with the present value of net minimum lease payments as of December 31, 2020 (in thousands): Year Amount 2021 $ 388 2022 391 2023 391 2024 391 2025 409 2026 and thereafter 2,839 Total minimum lease payments 4,809 Less: amount representing interest (960) Present value of net minimum lease payments $ 3,849 As of December 31, 2020, the Corporation had no finance leases that were signed, but had not yet commenced.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS The changes in goodwill included in the core banking segment during the years ended December 31, 2020 and 2019 were as follows (in thousands): 2020 2019 Beginning of year $ 21,824 $ 21,824 Acquired goodwill — — End of year $ 21,824 $ 21,824 Acquired intangible assets were as follows at December 31, 2020 and 2019 (in thousands): At December 31, 2020 At December 31, 2019 Balance Acquired Accumulated Amortization Balance Acquired Accumulated Amortization Core deposit intangibles $ 5,975 $ 5,962 $ 5,975 $ 5,832 Other customer relationship intangibles 5,633 5,388 5,633 5,034 Total $ 11,608 $ 11,350 $ 11,608 $ 10,866 Aggregate amortization expense was $0.5 million, $0.6 million, and $0.7 million for 2020, 2019 and 2018, respectively. The remaining estimated aggregate amortization expense at December 31, 2020 is listed below (in thousands): Year Estimated Expense 2021 $ 258 Total $ 258

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
DEPOSITS	DEPOSITS A summary of deposits at December 31, 2020 and 2019 is as follows (in thousands): 2020 2019 Non-interest-bearing demand deposits $ 620,423 $ 468,238 Interest-bearing demand deposits 282,172 200,089 Insured money market accounts 603,583 530,242 Savings deposits 245,865 212,393 Time deposits 285,731 161,176 Total $ 2,037,774 $ 1,572,138 Scheduled maturities of time deposits at December 31, 2020, are summarized as follows (in thousands): Year Maturities 2021 $ 193,113 2022 75,890 2023 12,784 2024 — 2025 1,084 2026 2,860 Total $ 285,731 Time deposits that meet or exceed the FDIC Insurance limit of $250 thousand at December 31, 2020 and 2019 were $31.2 million and $27.7 million, respectively.

SECURITIES SOLD UNDER AGREEMENT

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE	12 Months Ended
	Dec. 31, 2020
Disclosure of Repurchase Agreements [Abstract]
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE	SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Repurchase agreements are secured borrowings. The Corporation pledges investment securities to secure these borrowings. A summary of securities sold under agreements to repurchase as of and for the years ended December 31, 2020, 2019 and 2018 is as follows (in thousands): 2020 2019 2018 Balance at December 31 $ — $ — $ — Maximum month-end balance $ — $ — $ 10,000 Average balance during year $ — $ — $ 3,644 Weighted-average interest rate at December 31 — % — % — % Average interest rate paid during year — % — % 3.77 % There were no securities sold under agreements to repurchase as of December 31, 2020, 2019 and 2018. The Corporation enters into sales of securities under agreements to repurchase and the amounts received under these agreements represent borrowings and are reflected as a liability in the consolidated balance sheets. The securities underlying these agreements are included in investment securities in the consolidated balance sheets. See Note 3 for additional information regarding securities pledged as collateral for securities sold under the repurchase agreements. The Corporation has no control over the market value of the securities which fluctuate due to market conditions, however, the Corporation is obligated to promptly transfer additional securities if the market value of the securities falls below the repurchase agreement price. The Corporation manages this risk by utilizing highly marketable and easily priced securities, monitoring these securities for significant changes in market valuation routinely, and maintaining an unpledged securities portfolio believed to be sufficient to cover a decline in the market value of the securities sold under agreements to repurchase.

FEDERAL HOME LOAN BANK TERM ADV

FEDERAL HOME LOAN BANK TERM ADVANCES AND OVERNIGHT ADVANCES	12 Months Ended
	Dec. 31, 2020
Advances from Federal Home Loan Banks [Abstract]
FEDERAL HOME LOAN BANK TERM ADVANCES AND OVERNIGHT ADVANCES	FEDERAL HOME LOAN BANK TERM ADVANCES AND OVERNIGHT ADVANCES There were no FHLBNY fixed rate term advances and overnight advances as of December 31, 2020 and December 31, 2019. The Corporation has pledged $101.9 million and $170.0 million of first mortgage loans under a blanket lien arrangement at December 31, 2020 and 2019, respectively, as collateral for future borrowings. Based on this collateral and the Corporation’s holdings of FHLBNY stock, the Corporation is eligible to borrow up to a total of $86.3 million at December 31, 2020.

REVENUE FROM CONTRACTS WITH CUS

REVENUE FROM CONTRACTS WITH CUSTOMERS	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
REVENUE FROM CONTRACTS WITH CUSTOMERS	REVENUE FROM CONTRACTS WITH CUSTOMERS All of the Corporation's revenue from contracts with customers in the scope of ASC 606 is recognized within non-interest income. The following tables present the Corporation's non-interest income by revenue stream and reportable segment for the years ended December 31, 2020, 2019 and 2018 (in thousands). Items outside the scope of ASC 606 are noted as such. Year ended December 31, 2020 Revenue by Operating Segment: Core Banking WMG Holding Company, CFS, and CRM (b) Total Non-interest income Service charges on deposit accounts Overdraft fees $ 2,304 $ — $ — $ 2,304 Other 830 — — 830 Interchange revenue from debit card transactions 4,068 — — 4,068 WMG fee income — 9,492 — 9,492 CFS fee and commission income — — 657 657 Net gains (losses) on sales of OREO (79) — — (79) Net gains on sales of loans (a) 1,730 — — 1,730 Loan servicing fees (a) 121 — — 121 Change in fair value of equity securities (a) 139 — (50) 89 Income from bank-owned life insurance (a) 161 — 161 Other (a) 1,708 — 43 1,751 Total non-interest income $ 10,982 $ 9,492 $ 650 $ 21,124 (a) Not within scope of ASC 606. (b) The Holding Company, CFS, and CRM column above includes amounts to eliminate transactions between segments. Year ended December 31, 2019 Revenue by Operating Segment: Core Banking WMG Holding Company, CFS, and CRM (b) Total Non-interest income Service charges on deposit accounts Overdraft fees $ 3,653 $ — $ — $ 3,653 Other 807 — — 807 Interchange revenue from debit card transactions 4,104 — — 4,104 WMG fee income — 9,503 — 9,503 CFS fee and commission income — — 673 673 Net gains (losses) on sales of OREO (99) — — (99) Net gains on sales of loans (a) 248 — — 248 Loan servicing fees (a) 103 — — 103 Net gains on sales of securities (a) 19 — — 19 Change in fair value of equity securities (a) 143 — (62) 81 Other (a) 1,378 — (397) 981 Total non-interest income $ 10,356 $ 9,503 $ 214 $ 20,073 (a) Not within scope of ASC 606. (b) The Holding Company, CFS, and CRM column above includes amounts to eliminate transactions between segments. Year ended December 31, 2018 Revenue by Operating Segment: Core Banking WMG Holding Company, CFS, and CRM (b) Total Non-interest income Service charges on deposit accounts Overdraft fees $ 3,934 $ — $ — $ 3,934 Other 793 — — 793 Interchange revenue from debit card transactions 4,040 — — 4,040 WMG fee income — 9,317 — 9,317 CFS fee and commission income — — 510 510 Net gains (losses) on sales of OREO 90 — — 90 Net gains on sales of loans (a) 351 — — 351 Loan servicing fees (a) 92 — — 92 Change in fair value of equity securities (a) 2,024 — (20) 2,004 Other (a) 2,272 — (329) 1,943 Total non-interest income $ 13,596 $ 9,317 $ 161 $ 23,074 (a) Not within scope of ASC 606. (b) The Holding Company, CFS, and CRM column above includes amounts to eliminate transactions between segments. A description of the Corporation's revenue streams accounted for under ASC 606 follows: Service Charges on Deposit Accounts: The Corporation earns fees from its deposit customers for transaction-based, account maintenance, and overdraft services. Transaction-based fees, which included services such as ATM use fees, stop payment charges, statement rendering, and ACH fees, are recognized at the time the transaction is executed as that is the point in time the Corporation fulfills the customer's request. Account maintenance fees, which relate primarily to monthly maintenance, are recognized at the time the maintenance occurs. Overdraft fees are recognized at the point in time that the overdraft occurs. Service charges on deposits are withdrawn from the customer's account balance. Interchange Income from Debit Card Transactions: The Corporation earns interchange fees from debit cardholder transactions conducted through the Mastercard payment network. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to cardholder. WMG Fee Income (Gross): The Corporation earns wealth management fees from its contracts with trust customers to manage assets for investment, and/or to conduct transactions on their accounts. These fees are primarily earned over time as the Corporation provides the contracted monthly or quarterly services and are generally assessed based on a tiered scale of the market value of assets under management (AUM) at quarter-end. CFS Fee and Commission Income (Net): The Corporation earns fees from investment brokerage services provided to its customers by a third-party service provider. The Corporation receives commissions from the third-party service provider on a monthly basis based upon customer activity for the month. The Corporation (i) acts as an agent in arranging the relationship between the customer and the third-party service provider and (ii) does not control the services rendered to the customers. Investment brokerage fees are presented net of related costs. The Corporation also earns fees from tax services provided to its customers.

DERIVATIVES

DERIVATIVES	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES As part of the Corporation's product offerings, the Corporation acts as an interest rate swap counterparty for certain commercial borrowers in the normal course of servicing our customers. The interest rate swap agreements are free-standing derivatives and are recorded at fair value in the Corporation's consolidated balance sheets. The Corporation manages its exposure to such interest rate swaps by entering into corresponding and offsetting interest rate swaps with third parties that mirror the terms of the interest rate swaps it has with the commercial borrowers. These positions directly offset each other and the Corporation's exposure is the fair value of the derivatives due to potential changes in credit risk of our commercial borrowers and third parties. The Corporation also enters into risk participation agreements with dealer banks on commercial loans in which it participates. The Corporation receives an upfront fee for participating in the credit exposure of the interest rate swap associated with the commercial loan in which it is a participant and the fee received is recognized immediately in other non-interest income. The Corporation is exposed to its share of the credit loss equal to the fair value of the interest rate swap in the event of nonperformance by the counterparty of the interest rate swap. The Corporation determines the fair value of the credit loss exposure using an estimated credit default rate based on the historical performance of similar assets. The notional amount of the interest rate swaps does not represent amounts exchanged by the parties. The amount exchanged is determined by reference to the notional amount and the other terms of the individual interest rate swap agreements. At December 31, 2020, the Corporation held derivatives not designated as hedging instruments with a total notional amount of $377.0 million. Derivatives not designated as hedging instruments included back-to-back interest rate swaps of $358.2 million, consisting of $179.1 million of interest rate swaps with commercial borrowers and an additional $179.1 million of offsetting interest rate swaps with third-party counter-parties on substantially the same terms, and risk participation agreements with dealer banks of $18.8 million. Free-standing derivatives are not designated as hedges for accounting purposes and are therefore recorded at fair value with changes in fair value recorded in other non-interest income. The following table presents information regarding our derivative financial instruments, at December 31: 2020 Number of Instruments Notional Amount Weighted Average Maturity Weighted Average Interest Rate Received Weighted Average Contract Pay Rate Fair Value Other Assets/ (Other Liabilities) Derivatives not designated as hedging instruments: Interest rate swap agreements on loans with commercial loan customers 26 $ 179,085 7.7 3.95 % 2.20 % $ (15,024) Interest rate swap agreements with third-party counter-parties 26 179,085 7.7 2.20 % 3.95 % 14,702 Risk participation agreements 4 18,840 2.8 (35) Total 56 $ 377,010 $ (357) 2019 Number of Instruments Notional Amount Weighted Average Maturity Weighted Average Interest Rate Received Weighted Average Contract Pay Rate Fair Value Other Assets/ (Other Liabilities) Derivatives not designated as hedging instruments: Interest rate swap agreements on loans with commercial loan customers 15 $ 113,204 7.9 4.44 % 4.03 % $ (6,800) Interest rate swap agreements with third-party counter-parties 15 113,204 7.9 4.03 % 4.44 % 6,466 Risk participation agreements 3 11,819 5.6 (31) 33 $ 238,227 $ (365) 2018 Number of Instruments Notional Amount Weighted Average Maturity Weighted Average Interest Rate Received Weighted Average Contract Pay Rate Fair Value Other Assets/ (Other Liabilities) Derivatives not designated as hedging instruments: Interest rate swap agreements on loans with commercial loan customers 11 $ 76,395 7.1 4.69 % 4.61 % $ (3,255) Interest rate swap agreements with third-party counter-parties 11 76,395 7.1 4.61 % 4.69 % 3,142 Risk participation agreements 6 20,142 15.0 (27) 28 $ 172,932 $ (140) Off-balance sheet exposure for the risk participation agreements was $0.4 million for December 31, 2020 and December 31, 2019. Amounts included in the Consolidated Statements of Income related to derivatives not designated as hedging were as follows: Years Ended December 31, 2020 2019 2018 Derivatives not designated as hedging instruments: Interest rate swap agreements with commercial loan customers: Unrealized (loss) recognized in non-interest income $ (8,224) $ (3,544) $ (2,281) Interest rate swap agreements with third-party counter-parties: Unrealized gain recognized in non-interest income 8,236 3,324 2,168 Risk participation agreements: Unrealized gain (loss) recognized in non-interest income (4) (4) 48 Unrealized gain (loss) recognized in non-interest income $ 8 $ (224) $ (65)

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES For the years ended December 31, 2020, 2019 and 2018, income tax expense attributable to income from operations consisted of the following (in thousands): 2020 2019 2018 Current expense: Federal $ 4,413 $ 4,603 $ 1,732 State 280 395 124 Total current 4,693 4,998 1,856 Deferred expense/(benefit): Federal (136) (1,126) 2,253 State 50 (438) 345 Remeasurement of deferred tax assets — — (445) Total deferred (86) (1,564) 2,153 Income tax expense $ 4,607 $ 3,434 $ 4,009 Income tax expense differed from the amounts computed by applying the U.S. Federal statutory income tax rate to income before income tax expense as follows (in thousands): 2020 2019 2018 Statutory federal tax rate 21 % 21 % 21 % Tax computed at statutory rate $ 5,013 $ 3,999 $ 4,963 Increase (reduction) resulting from: Tax-exempt income (395) (424) (430) 831(b) premium adjustment (296) (189) (167) Dividend exclusion (5) (7) (7) State taxes, net of Federal impact 118 (86) 262 Nondeductible interest expense 5 9 7 Remeasurement of deferred tax assets — — (445) Other items, net 167 132 (174) Income tax expense $ 4,607 $ 3,434 $ 4,009 Effective tax rate 19.3 % 18.0 % 17.0 % The higher tax expense in 2020 when compared to 2019 can be attributed to an increase in pretax income. The lower tax expense in 2019 when compared to 2018 can be attributed to a decrease in pretax income. The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019, are presented below (in thousands): 2020 2019 Deferred tax assets: Allowance for loan losses $ 5,393 $ 6,046 Accrual for employee benefit plans 47 92 Depreciation 681 379 Deferred compensation and directors' fees 1,045 765 Operating lease liabilities 1,831 2,050 Purchase accounting adjustment – loans 1 1 Purchase accounting adjustment – fixed assets 149 149 Gain on deemed sale of securities 54 71 Accounting for defined benefit pension and other benefit plans 2,302 2,448 Nonaccrued interest 687 695 Accrued expense 158 179 Other items, net 48 38 Total gross deferred tax assets 12,396 12,913 Deferred tax liabilities: Deferred loan fees and costs 274 592 Prepaid pension 3,344 3,189 Net unrealized gains on securities available for sale 3,124 468 Discount accretion 50 24 Core deposit intangible 1,353 1,213 REIT dividend 616 922 Operating lease right-of-use assets 1,831 2,050 Other 168 103 Total gross deferred tax liabilities 10,760 8,561 Net deferred tax asset $ 1,636 $ 4,352 Realization of deferred tax assets is dependent upon the generation of future taxable income. A valuation allowance is recognized when it is more likely than not that some portion of the deferred tax assets will not be realized. In assessing the need for a valuation allowance, management considers the scheduled reversal of the deferred tax assets, the level of historical taxable income and projected future taxable income over the periods in which the temporary differences comprising the deferred tax assets will be deductible. Based on its assessment, management determined that no valuation allowance is necessary. As of December 31, 2020, 2019 and 2018, the Corporation did not have any unrecognized tax benefits. The Corporation accounts for interest and penalties related to uncertain tax positions as part of its provision for Federal and State income taxes. As of December 31, 2020, 2019 and 2018, the Corporation did not accrue any interest or penalties related to its uncertain tax positions.

PENSION PLAN AND OTHER BENEFIT

PENSION PLAN AND OTHER BENEFIT PLANS	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
PENSION PLAN AND OTHER BENEFIT PLANS	PENSION PLAN AND OTHER BENEFIT PLANS Pension Plan The Corporation has a noncontributory defined benefit pension plan covering a majority of employees. The plan's defined benefit formula generally based payments to retired employees upon their length of service multiplied by a percentage of the average monthly pay over the last five years of employment. New employees hired on or after the July 10, 2010 were not eligible to participate in the plan, however, existing participants at that time continued to accrue benefits. On October 20, 2016, the Corporation amended its noncontributory defined benefit pension plan (“pension plan”) to freeze future retirement benefits after December 31, 2016. Beginning on January 1, 2017, both the pay-based and service-based component of the formula used to determine retirement benefits in the pension plan were frozen so that participants will no longer earn further retirement benefits. During the fourth quarter of 2018, the Corporation offered terminated, vested employees the option to receive lump sum settlement payments. A payout to participants of $3.3 million during the year ended December 31, 2018 is reflected in the projected benefit obligation and fair value of assets tables presented below. A settlement charge of $828 thousand has been recognized during the year ended December 31, 2018 in order to accelerate the recognition of a portion of the plan's unrecognized net loss. The Corporation uses a December 31 measurement date for its pension plan. The following table presents (1) changes in the plan's projected benefit obligation and plan assets, and (2) the plan's funded status at December 31, 2020 and 2019 (in thousands): Change in projected benefit obligation: 2020 2019 Benefit obligation at beginning of year $ 39,886 $ 36,022 Service cost — — Interest cost 1,300 1,522 Actuarial (gain) loss 3,735 4,474 Curtailments — — Settlements — — Benefits paid (2,140) (2,132) Benefit obligation at end of year $ 42,781 $ 39,886 Change in plan assets: 2020 2019 Fair value of plan assets at beginning of year $ 45,557 $ 41,476 Actual return on plan assets 6,717 6,213 Employer contributions — — Settlements — — Benefits paid (2,140) (2,132) Fair value of plan assets at end of year $ 50,134 $ 45,557 Funded status $ 7,353 $ 5,671 Amount recognized in accumulated other comprehensive income (loss) at December 31, 2020 and 2019 consist of the following (in thousands): 2020 2019 Net actuarial loss $ 8,602 $ 9,352 Prior service cost — — Total before tax effects $ 8,602 $ 9,352 The accumulated benefit obligation at December 31, 2020 and 2019 was $42.8 million and $39.9 million, respectively. Actuarial losses in the Projected Benefit Obligation (PBO) in 2020 were primarily the result of the decrease in discount rate. The decrease in discount rate caused the PBO to increase by $3.5 million. Other sources of gain/loss such as plan experience, updated census data and minor adjustments to actuarial assumptions generated a combined loss of less than 1% of expected year end obligations. The principal actuarial assumptions used in determining the projected benefit obligation as of December 31, 2020, 2019 and 2018 were as follows: 2020 2019 2018 Discount rate 2.61 % 3.33 % 4.35 % Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A Components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss) in 2020, 2019 and 2018 consist of the following (in thousands): Net periodic benefit cost 2020 2019 2018 Service cost, benefits earned during the year $ — $ — $ — Interest cost on projected benefit obligation 1,300 1,522 1,551 Expected return on plan assets (2,444) (2,221) (3,309) Amortization of net loss 213 204 188 Amortization of prior service cost — — — Recognized (gain) loss due to settlements — — 828 Net periodic cost (benefit) $ (931) $ (495) $ (742) Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): 2020 2019 2018 Net actuarial (gain) loss $ (538) $ 481 $ 736 Recognized loss (213) (204) (1,016) Amortization of prior service cost — — — Total recognized in other comprehensive income (loss) (before tax effect) $ (751) $ 277 $ (280) Total recognized in net (benefit) cost and other comprehensive income (loss) (before tax effect) $ (1,682) $ (218) $ (1,022) During 2020, the plan's total unrecognized net gain increased by $0.8 million. The variance between the actual and expected return on plan assets during 2020 decreased the total unrecognized net loss by $4.3 million. Because the total unrecognized net gain or loss in the plan exceeds 10% of the projected benefit obligation or 10% of the plan assets, and the plan is frozen, the excess will be amortized over the average future life expectancy of all plan participants. Prior to the plan freeze on December 31, 2016, the excess had been amortized over the average future working lifetime of all plan participants. As of January 1, 2020, the average expected future life expectancy of all participants which was 23.78 years. Actual results for 2021 will depend on the 2021 actuarial valuation of the plan. The principal actuarial assumptions used in determining the net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018 were as follows: 2020 2019 2018 Discount rate 3.33 % 4.35 % 3.74 % Expected return on assets 5.50 % 5.50 % 7.25 % Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A The Corporation changes important assumptions whenever changing conditions warrant. At December 31, 2020 the Corporation used IRS Static 2021 Mortality Table with Mortality Improvement Scale MP-2019 as a basis for the Plan's valuation. At December 31, 2019, the Corporation used IRS Static 2020 Mortality Table with Mortality Improvement Scale MP-2018 as a basis for the Plan's valuation. The discount rate is evaluated at least annually and the expected long-term return on plan assets will typically be revised every three The Corporation's overall investment strategy is to achieve a mix of investments for long-term growth and for near-term benefit payments with a wide diversification of asset types. The target allocations for plan assets are shown in the table below. Equity securities primarily include investments in common or preferred shares of both U.S. and international companies. Debt securities include U.S. Treasury and Government bonds as well as U.S. Corporate bonds. Other investments may consist of mutual funds, money market funds and cash & cash equivalents. While no significant changes in the asset allocations are expected during 2021, the Corporation may make changes at any time. The expected return on plan assets was determined based on a CAPM using historical and expected future returns of the various asset classes, reflecting the target allocations described below. Asset Class Target Allocation 2020 Percentage of Plan Assets at December 31, Expected Long-Term Rate of Return 2020 2019 Large cap domestic equities 20% - 50% 43 % 38 % 8.7 % Mid-cap domestic equities 0% - 15% 2 % 2 % 9.4 % Small-cap domestic equities 0% - 10% 3 % 2 % 8.8 % International equities 0% - 20% 3 % 8 % 5.1 % Intermediate fixed income 30% - 70% 45 % 45 % 4.7 % Alternative assets 0% - 10% — % — % — % Cash 0% - 20% 4 % 5 % 1.3 % Total 100 % 100 % The investment policy of the plan is to provide for long-term growth of principal and income without undue exposure to risk. The focus is on long-term capital appreciation and income generation. The Corporation maintains an IPS that guides the investment allocation in the plan. The IPS describes the target asset allocation positions as shown in the table above. The Corporation has appointed an Employee Pension and Profit Sharing Committee to manage the general philosophy, objectives and process of the plan. The Employee Pension and Profit Sharing Committee meets with the Investment Manager periodically to review the plan's performance and to ensure that the current investment allocation is within the guidelines set forth in the IPS. Only the Employee Pension and Profit Sharing Committee, in consultation with the Investment Manager, can make adjustments to maintain target ranges and for any permanent changes to the IPS. Quarterly, the Board of Directors' Trust and Employee Benefits Committee reviews the performance of the plan with the Investment Manager. As of December 31, 2020 and 2019, the Corporation's pension plan did not hold any direct investment in the Corporation's common stock. The Corporation used the following methods and significant assumptions to estimate the fair value of each type of financial instrument held by the pension plan: Fair value is the exchange price that would be received for an asset in the principal or most advantageous market for the asset in an orderly transaction between market participants on the measurement date. The fair value hierarchy described below requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The fair values for investment securities are determined by quoted market prices, if available (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2). 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). Discounted cash flows are calculated using spread and optionality. During times when trading is more liquid, broker quotes are used (if available) to validate the model. Rating agency and industry research reports as well as defaults and deferrals on individual securities are reviewed and incorporated into the calculations. The fair value of the plan assets at December 31, 2020 and 2019, by asset class are as follows (in thousands): Fair Value Measurement atDecember 31, 2020 Using Plan Assets Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Cash $ 2,047 $ 2,047 $ — $ — Equity securities: U.S. companies 21,716 21,716 — — Mutual funds 23,778 23,778 — — Debt securities: U.S. Treasuries/Government bonds 2,318 — 2,318 — U.S. Corporate bonds 275 — 275 — Total plan assets $ 50,134 $ 47,541 $ 2,593 $ — Fair Value Measurement atDecember 31, 2019 Using Plan Assets Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Cash $ 2,210 $ 2,210 $ — $ — Equity securities: U.S. companies 17,939 17,939 — — Mutual funds 21,328 21,328 — — Debt securities: U.S. Treasuries/Government bonds 3,054 — 3,054 — U.S. Corporate bonds 1,026 — 1,026 — Total plan assets $ 45,557 $ 41,477 $ 4,080 $ — The following table presents the estimated benefit payments for each of the next five years and the aggregate amount expected to be paid in years six through ten for the pension plan (in thousands): Calendar Year Future Expected Benefit Payments 2021 $ 2,273 2022 $ 2,279 2023 $ 2,276 2024 $ 2,283 2025 $ 2,284 2026-2030 $ 11,379 The Corporation does not expect to contribute to the plan during 2021. Funding requirements for subsequent years are uncertain and will significantly depend on changes in assumptions used to calculate plan funding levels, the actual return on plan assets, changes in the employee groups covered by the plan, and any legislative or regulatory changes affecting plan funding requirements. For tax planning, financial planning, cash flow management or cost reduction purposes the Corporation may increase, accelerate, decrease or delay contributions to the plan to the extent permitted by law. Defined Contribution Profit Sharing, Savings and Investment Plan On October 20, 2016, the Bank amended its defined contribution profit sharing, savings, and investment plan for all active participants to supersede the current contribution formula used by the Plan, which included eliminating the 1000 hours of service requirement to participate in employer contributions. Beginning on January 1, 2017, the Bank began contributing a non-discretionary 3% of gross annual wages for each participant, regardless of the participant’s deferral, and eliminated discretionary contributions for participants hired prior to July 1, 2010. Additionally, beginning January 1, 2017 the Bank began contributing a 50% match up to 6% of gross annual wages. Expense related to both plans totaled $1.3 million, $1.3 million, and $1.2 million for the years ended December 31, 2020, 2019 and 2018, respectively. The plan's assets at December 31, 2020, 2019 and 2018 include 137,698, 155,696, and 148,716 shares, respectively, of Chemung Financial Corporation common stock, as well as other common and preferred stocks, U.S. Government securities, corporate bonds and notes, and mutual funds. Defined Benefit Health Care Plan On October 20, 2016, the Corporation amended its defined benefit health care plan to not allow any new retirees into the plan, effective January 1, 2017. The effects of this freeze are reflected in the defined benefit health care plan disclosures as of December 31, 2017. The Corporation uses a December 31 measurement date for its defined benefit health care plan. The following table presents (1) changes in the plan's accumulated postretirement benefit obligation and (2) the plan's funded status at December 31, 2020 and 2019 (in thousands): Changes in accumulated postretirement benefit obligation: 2020 2019 Accumulated postretirement benefit obligation - beginning of year $ 332 $ 363 Service cost — — Interest cost 9 16 Participant contributions 35 49 Amendments — — Actuarial (gain) loss (57) 31 Benefits paid (70) (127) Accumulated postretirement benefit obligation at end of year $ 249 $ 332 Change in plan assets: 2020 2019 Fair value of plan assets at beginning of year $ — $ — Employer contribution 35 78 Plan participants’ contributions 35 49 Benefits paid (70) (127) Fair value of plan assets at end of year $ — $ — Unfunded status $ (249) $ (332) Amount recognized in accumulated other comprehensive income (loss) at December 31, 2020 and 2019 consist of the following (in thousands): 2020 2019 Net actuarial loss $ 286 $ 417 Prior service credit (220) (440) Total before tax effects $ 66 $ (23) Weighted-average assumption for disclosure as of December 31: 2020 2019 2018 Discount rate 2.61% 3.33% 4.35% Assumed rate of future compensation increase N/A N/A N/A Health care cost trend: Initial (Pre-65/Post 65) 6.95% / 5.45% 6.95% / 5.45% 6.95% / 5.45% Health care cost trend: Ultimate (Pre-65/Post 65) 4.75% / 4.75% 4.75% / 4.75% 4.75% / 4.75% Year ultimate cost trend reached 2026 2025 2024 The components of net periodic postretirement benefit cost for the years ended December 31, 2020, 2019 and 2018 are as follows (in thousands): Net periodic cost (benefit) 2020 2019 2018 Service cost $ — $ — $ — Interest cost 9 16 16 Expected return on plan assets — — — Amortization of prior service benefit (220) (220) (220) Recognized actuarial loss 74 105 123 Recognized prior service benefit due to curtailments — — — Net periodic postretirement cost (benefit) $ (137) $ (99) $ (81) Other changes in plan assets and benefit obligations 2020 2019 2018 Net actuarial (gain) loss $ (57) $ 31 $ 22 Recognized actuarial loss (74) (105) (123) Prior service credit — — — Amortization of prior service benefit 220 220 220 Total recognized in other comprehensive income (loss)(before tax effect) $ 89 $ 146 $ 119 Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect) $ (48) $ 47 $ 38 Actuarial gain for 2020 is primarily the net impact of a decrease in discount rate, which raised the Accumulated Postretirement Benefit Obligation (APBO) by $10 thousand and claims and date experience, which (combined) decreased the APBO by $65 thousand. During 2020 the plan's total unrecognized net loss decreased by $131 thousand. Because the total unrecognized net gain or loss in the plan exceeds 10% of the accumulated postretirement benefit obligation, the excess will be amortized over the average future life expectancy of all plan participants. As of January 1, 2020, the average future life expectancy of all plan participants was 5.0 years. Previous to the plan freeze as of December 31, 2016, the amortization period was based upon average future working lifetime of active employees. Actual results for 2021 will depend on the 2021 actuarial valuation of the plan. The change in unrecognized gain/loss is one measure of the degree to which important assumptions have coincided with actual experience. During 2020, the unrecognized net loss decreased by 39.2% of the December 31, 2019 accumulated postretirement benefit obligation. The Corporation changes important assumptions whenever changing conditions warrant. The discount rate and per capita costs are typically changed at least annually. Other material assumptions include rates of participant mortality and rates of increase in medical costs. Weighted-average assumptions for net periodic cost as of December 31: 2020 2019 2018 Discount rate 3.33% 4.35% 3.74% Expected return on plan assets N/A N/A N/A Assumed rate of future compensation increase N/A N/A N/A Health care cost trend: Initial 6.95% / 5.45% 6.95% / 5.45% 6.50% Health care cost tread: Ultimate 4.75% / 4.75% 4.75% / 4.75% 5.00% Year ultimate reached 2025 2024 2021 The following table presents the estimated benefit payments for each of the next five years and the aggregate amount expected to be paid in years six through ten (in thousands): Calendar Year Future Estimated Benefit Payments 2021 $ 48 2022 $ 35 2023 $ 36 2024 $ 20 2025 $ 19 2026-2030 $ 74 The Corporation’s policy is to contribute the amount required to fund postretirement benefits as they become due to retirees. The amount expected to be required in contributions to the plan during 2021 is $48 thousand. Executive Supplemental Pension Plan The Corporation also sponsors an Executive Supplemental Pension Plan for certain former executive officers to restore certain pension benefits that may be reduced due to limitations under the Internal Revenue Code. The benefits under this plan are unfunded as of December 31, 2020 and 2019. The Corporation uses a December 31 measurement date for its Executive Supplemental Pension Plan. The following table presents Executive Supplemental Pension plan status at December 31, 2020 and 2019 (in thousands): Change in projected benefit obligation: 2020 2019 Benefit obligation at beginning of year $ 1,232 $ 1,179 Service cost — — Interest cost 39 49 Actuarial (gain) loss 89 113 Benefits paid (109) (109) Projected benefit obligation at end of year $ 1,251 $ 1,232 Changes in plan assets: 2020 2019 Fair value of plan assets at beginning of year $ — $ — Employer contributions 109 109 Benefits paid (109) (109) Fair value of plan assets at end of year $ — $ — Unfunded status $ (1,251) $ (1,232) Amounts recognized in accumulated other comprehensive income (loss) at December 31, 2020 and 2019 consist of the following (in thousands): 2020 2019 Net actuarial loss $ 359 $ 283 Prior service cost — — Total before tax effects $ 359 $ 283 Accumulated benefit obligation at December 31, 2020 and 2019 was $1.3 million and $1.2 million, respectively. Weighted-average assumption for disclosure as of December 31: 2020 2019 2018 Discount rate 2.61 % 3.33 % 4.35 % Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A The components of net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018 are as follows (in thousands): Net periodic benefit cost 2020 2019 2018 Service cost $ — $ — $ — Interest cost 39 49 46 Recognized actuarial loss 13 4 7 Net periodic postretirement benefit cost $ 52 $ 53 $ 53 Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss): 2020 2019 2018 Net actuarial (gain) loss $ 89 $ 113 $ (47) Recognized actuarial loss (13) (4) (7) Total recognized in other comprehensive income (loss) (before tax effect) $ 76 $ 109 $ (54) Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect) $ 128 $ 162 $ (1) Actuarial losses in the projected benefit obligation in 2020 were primarily the result of the decrease in discount rate, $69 thousand, and mortality losses, $23 thousand. Other sources of gains/losses, including the update in mortality table, generated losses of less than 1% of expected year end obligations. During 2020, the plan's total unrecognized net loss increased by $76 thousand. Because the total unrecognized net gain or loss exceeds the greater of 10% of the projected benefit obligation or 10% of the plan assets, the excess will be amortized over the average future life expectancy of all participants. Previously, the excess had been amortized over the average future working lifetime of active participants, however, there are no longer any active participants in the plan as of January 1, 2017, so the amortization period was changed to be the average future life expectancy of all plan participants. As of January 1, 2021, the average future life expectancy of plan participants was 12.04 years. Weighted-average assumptions for net periodic cost as of December 31: 2020 2019 2018 Discount rate 3.33 % 4.35 % 3.74 % Expected asset return N/A N/A N/A Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A The discount rate was determined by projecting the plan's expected future benefit payments as defined for the projected benefit obligation, discounting those expected payments using a theoretical zero-coupon spot yield curve derived from a universe of high-quality bonds as of the measurement date, and solving for the single equivalent discount rate that resulted in the same projected benefit obligation. The change in unrecognized net gain.loss is one measure of the degree to which important assumptions have coincided with actual experience. During 2020 the unrecognized net loss increased by 6.2% of the December 31, 2019 projected benefit obligation. The following table presents the estimated benefit payments for each of the next five years and the aggregate amount expected to be paid in years six through ten for the Supplemental Pension Plan (in thousands): Calendar Year Future Estimated Benefit Payments 2021 $ 108 2022 $ 106 2023 $ 104 2024 $ 101 2025 $ 97 2026-2030 $ 417 The Corporation expects to contribute $110 thousand to the plan during 2021. Corporation contributions are equal to the benefit payments to plan participants. Funding requirements for subsequent years are uncertain and will significantly depend upon changes in assumptions used to calculate plan funding levels, the actual return on plan assets, changes in the employee groups covered by the plan, and any legislative or regulatory changes affecting plan funding requirements. For tax planning, financial planning, cash flow management or cost reduction purposes, the Corporation may increases, accelerate, decrease or delay contributions to the plan to the extent permitted by law. Defined Contribution Supplemental Executive Retirement Plan The Corporation also sponsors a Defined Contribution Supplemental Executive Retirement Plan for certain current executive officers, which was initiated in 2012. The plan is unfunded as of December 31, 2020 and is intended to provide nonqualified deferred compensation benefits payable at retirement, disability, death or certain other events. The accrued obligation for the plan as of December 31, 2020 and 2019 was $2.0 million and $1.6 million, respectively. A total of $0.4 million, $0.4 million, and $0.3 million was expensed during the years ended December 31, 2020, 2019, and 2018, respectively. In addition to each participants account being credited with the annual company contribution, each account will receive a quarterly interest credit that will equal the average yield on five year U.S. Treasury Notes.

STOCK COMPENSATION

STOCK COMPENSATION	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
STOCK COMPENSATION	STOCK COMPENSATION Board of Directors' Stock Compensation Members of the Board of Directors receive common shares of the Corporation equal in value to the amount of fees individually earned during the previous year for service as a director. The common shares are distributed to the Corporation's individual Board of Directors members from treasury shares of the Corporation on or about January15 following the calendar year of service. In 2019, the annual cash retainer paid to each non-employee director of the Corporation was increased by $6,000 to $11,500 and $19,250 for the Chairman of the Board. The retainer for the Chairman of the Audit Committee was also increased by an additional $2,875 to $14,375. The directors waived their right to stock compensation for the additional retainer fees paid. Additionally, the Chief Executive Officer of the Corporation, who does not receive cash compensation as a member of the Board of Directors, is awarded common shares equal in value to the average of those awarded to Board of Directors members not employed by the Corporation who have served for 12 months during the prior year. During January 2021, 2020, and 2019, 9,291, 7,923 and 8,465 shares, respectively, were re-issued from treasury to fund the stock component of the directors' and the Chief Executive Officer’s compensation. An expense of $318 thousand, $350 thousand and $357 thousand related to this compensation was recognized during the years ended December 31, 2020, 2019 and 2018, respectively. This expense is accrued as shares are earned. Restricted Stock Plan Pursuant to the Corporation’s Restricted Stock Plan (the “Plan”), the Corporation may make discretionary grants of restricted stock to officers other than the Corporation's Chief Executive Officer. Compensation expense is recognized over the vesting period of the awards based on the fair value of the stock at issue date. A summary of restricted stock activity as of December 31, 2020, and changes during the year ended is presented below: Shares Weighted–Average Grant Date Fair Value Nonvested at December 31, 2019 33,575 $ 43.24 Granted 14,805 35.21 Vested (16,438) 41.65 Forfeited or Cancelled (112) 44.72 Nonvested at December 31, 2020 31,830 $ 40.32 As of December 31, 2020, there was $1.1 million of total unrecognized compensation cost related to nonvested shares granted under the Plan. The cost is expected to be recognized over a weighted-average period of 3.88 years. The total fair value of shares vested during the years ended December 31, 2020, 2019 and 2018 were $556 thousand, $438 thousand and $432 thousand, respectively.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Members of the Board of Directors, certain Corporation officers, and their immediate families directly, or through entities in which they are principal owners (more than 10% interest) or board members, were customers of, and had loans and other transactions with the Corporation. These loans are summarized as follows for the years ended December 31, 2020 and 2019 (in thousands): 2020 2019 Balance at beginning of year $ 59,973 $ 62,741 New loans or additional advances 7,461 1,895 Effect of changes in composition of related parties — 4,456 Repayments (11,382) (9,119) Balance at end of year $ 56,052 $ 59,973 Deposits from principal officers, directors, and their affiliates at December 31, 2020 and 2019 were $39.5 million and $18.3 million, respectively. The Bank leases its branch located at 1365 New Scotland Road, Slingerlands, New York, under a lease agreement through July 2022 from a member of the Corporation's Board of Directors with monthly rent expense totaling $4 thousand per month. Annual rent paid to this Board of Directors member totaled $51 thousand, $52 thousand, and $45 thousand for the years ended December 31, 2020, 2019, and 2018, respectively. The Bank utilized legal services from a local law firm in 2019 and 2018 which a former member of the Board of Directors is a principal owner. Services totaled $10 thousand, and $28 thousand for the years ended December 31, 2019 and 2018, respectively. The Bank did not utilize legal services from the same local law firm for the year ended December 31, 2020. The Bank entered into a lease agreement in 2018 related to its branch located at 2 Rush Street, Schenectady, New York, under a lease agreement through February 2033 from a member of the Corporation's Board of Directors with monthly rent expense totaling $8 thousand per month. Rent paid to this Board of Directors member totaled $106 thousand, $93 thousand and $84 thousand for the years ended December 2020, 2019 and 2018, respectively. The Bank leases its branch located at 127 Court Street, Binghamton, New York under a lease agreement through June 2030 with monthly lease payments of $5 thousand. The lease originated with an entity in whom the employer of a Director of the Corporation had a twenty percent interest. In July 2017, the employer of the Director sold its interest in the property to an unrelated third party from which the Bank continues to lease the property. CFS offered insurance products to its customers through the same employer of a Director of the Corporation during the year ended December 31, 2018. CFS earned income of less than $1 thousand related to these insurance products during the year ended December 31, 2018. The Bank purchased insurance products from the same employer of a Director of the Corporation in the amount of $34 thousand during the year ended December 31, 2018. WMG provided trust services to members of the Board of Directors, certain Corporation officers, and their immediate families directly, or through entities in which they are principal owners or board members. WMG fee income for the trust services provided totaled $614 thousand, $580 thousand, and $593 thousand for the years ended December 31, 2020, 2019, and 2018, respectively.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Some financial instruments, such as loan commitments, credit lines, letters of credit, and overdraft protection, are issued to meet customer financing needs. These are agreements to provide credit or to support the credit of others, as long as conditions established in the contract are met, and usually have expiration dates. Commitments may expire without being used. Off-balance sheet risk to credit loss exists up to the face amount of these instruments, although material losses are not anticipated. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment. The contractual amounts of financial instruments with off-balance sheet risk at year-end were as follows (in thousands): 2020 2019 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $ 28,459 $ 39,056 $ 15,560 $ 25,233 Unused lines of credit $ 1,300 $ 268,075 $ 1,062 $ 229,137 Standby letters of credit $ — $ 16,094 $ — $ 16,272 Commitments to make real estate and home equity loans are generally made for periods of sixty days or less. As of December 31, 2020, the fixed rate real estate and home equity commitments to make loans have interest rates ranging from 2.63% to 5.50% and maturities ranging from three years to thirty years. Commitments to fund commercial draw notes are generally made for periods of three months to twenty-four months. As of December 31, 2020, the fixed rate commercial draw commitments have interest rates ranging from 3.50% to 6.25%. Because many commitments and almost all standby letters of credit expire without being funded in whole or in part, the contract amounts are not estimates of future cash flows. Loan commitments and unused lines of credit have off-balance sheet credit risk because only origination fees are recognized on the consolidated balance sheet until commitments are fulfilled or expire. The credit risk amounts are equal to the contractual amounts, assuming the amounts are fully advanced and collateral or other security is of no value. The Corporation does not anticipate losses as a result of these transactions. These commitments also have off-balance sheet interest rate risk in that the interest rate at which these commitments were made may not be at market rates on the date the commitments are fulfilled. The Corporation has issued conditional commitments in the form of standby letters of credit to guarantee payment on behalf of a customer and guarantee the performance of a customer to a third party. Standby letters of credit generally arise in connection with lending relationships. The credit risk involved in issuing these instruments is essentially the same as that involved in extending loans to customers. Contingent obligations under standby letters of credit totaled $16.1 million at December 31, 2020 and represent the maximum potential future payments the Corporation could be required to make. Typically, these instruments have terms of twelve months or less and expire unused; therefore, the total amounts do not necessarily represent future cash requirements. Each customer is evaluated individually for creditworthiness under the same underwriting standards used for commitments to extend credit and on-balance sheet instruments. Corporation policies governing loan collateral apply to standby letters of credit at the time of credit extension. The carrying amount and fair value of the Corporation's standby letters of credit at December 31, 2020 was not significant. On March 23, 2016, the Bank received a summons and complaint for an action brought in the State of New York Supreme Court for the County of Tompkins, regarding its lease of 202 East State Street, Ithaca, NY, a branch location which the Bank had vacated. The owner of the leased premises has alleged that the Bank has breached its contract and is requesting a judgment declaring that the term of the lease runs through December 31, 2025 or a judgment in his favor in the amount of $4.0 million. The Bank has denied that it breached the contract. On July 25, 2016, the Corporation received Notice of Entry of the decision and order of the New York Supreme Court for the County of Tompkins, involving claims by the owner of the leased premises at 202 East State Street, Ithaca, New York against the Bank. The Court granted, in part, partial summary judgment in favor of the plaintiff - on the issue of liability only - for anticipatory breach and breach of contract. The fraud claims were dismissed, and summary judgment was denied on the plaintiff’s trespass claims. The Court set the matter down for an inquest on damages at a later date, with the original claim by the plaintiff seeking $4.0 million in damages. The Corporation established a legal reserve of $1.2 million in connection with this case during the second quarter of 2016. Subsequent to an appeal of the lower court determination, which was perfected in the Appellate Division, Third Department of State Supreme Court, on June 29, 2017, the Bank received Notice of Entry of the decision and Order of that Court which affirmed the lower court’s decision in favor of the plaintiff with damages to be determined at a later proceeding. The Bank established an additional legal reserve in the amount of $850 thousand, in connection with this case, during the second quarter of 2017. The Bank’s total reserve with respect to this matter stood at $2.3 million, including $0.2 million accrued for related expenses not yet paid as of June 30, 2017. A motion to the Appellate Division for reargument or permission for leave to appeal to the Court of Appeals was filed and denied during the fourth quarter of 2017. On June 15, 2018, the Bank, through mediation, reached a resolution by way of a settlement agreement in the matter of Fane v. Chemung Canal Trust Company (the “Action”). The parties agreed to release each other from any and all liabilities, claims, counterclaims, demands, charges, complaints and causes of action, to dismiss the Action with prejudice, and the Bank agreed to pay Fane $3.3 million in connection with the settlement of the Action. As of March 31, 2018, the Corporation had a legal reserve of $2.3 million for the Action and therefore recognized an additional $1.0 million of legal expense during the second quarter of 2018. In the normal course of business, there are various outstanding claims and legal proceedings involving the Corporation or its subsidiaries. Except for the above matter, the Corporation believes that it is not a party to any pending legal, arbitration, or regulatory proceedings that could have a material adverse impact on its financial results or liquidity.

PARENT COMPANY FINANCIAL INFORM

PARENT COMPANY FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
PARENT COMPANY FINANCIAL INFORMATION	PARENT COMPANY FINANCIAL INFORMATION Condensed parent company only financial statement information of Chemung Financial Corporation is as follows (investment in subsidiaries is recorded using the equity method of accounting) (in thousands): BALANCE SHEETS - DECEMBER 31 2020 2019 Assets: Cash on deposit with subsidiary bank $ 2,243 $ 3,938 Investment in subsidiary - Chemung Canal Trust Company 192,364 175,470 Investment in subsidiary - CFS Group, Inc. 876 868 Investment in subsidiary - Chemung Risk Management, Inc. 2,563 1,954 Dividends receivable from subsidiary bank 1,214 — Securities available for sale, at estimated fair value 377 492 Other assets 1,420 1,266 Total assets $ 201,057 $ 183,988 Liabilities and shareholders' equity: Dividends payable $ 1,214 $ 1,263 Other liabilities 144 98 Total liabilities 1,358 1,361 Shareholders' equity: Total shareholders' equity 199,699 182,627 Total liabilities and shareholders' equity $ 201,057 $ 183,988 STATEMENTS OF INCOME - YEARS ENDED DECEMBER 31 2020 2019 2018 Dividends from subsidiary bank and non-bank $ 10,806 $ 4,516 $ 3,187 Interest and dividend income 5 9 10 Non-interest income (50) (62) (20) Non-interest expenses 503 439 477 Income before impact of subsidiaries' undistributed earnings 10,258 4,024 2,700 Equity in undistributed earnings of Chemung Canal Trust Company 8,204 11,220 16,670 Equity in undistributed earnings of CFS Group, Inc. 8 (4) (32) Equity in undistributed earnings of Chemung Risk Management, Inc. 610 205 124 Income before income tax 19,080 15,445 19,462 Income tax benefit (182) (164) (164) Net income $ 19,262 $ 15,609 $ 19,626 STATEMENTS OF CASH FLOWS - YEARS ENDED DECEMBER 31 2020 2019 2018 Cash flows from operating activities: Net Income $ 19,262 $ 15,609 $ 19,626 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of Chemung Canal Trust Company (8,204) (11,220) (16,670) Equity in undistributed earnings of CFS Group, Inc. (8) 4 32 Equity in undistributed earnings of Chemung Risk Management, Inc. (610) (205) (124) Change in dividend receivable (1,214) — 1,233 Change in other assets (154) (196) (32) Change in other liabilities 6 (48) 773 Expense related to employee stock compensation 101 100 89 Expense related to restricted stock units for directors' deferred compensation plan 29 42 67 Expense to employee restricted stock awards 672 503 405 Net cash provided by operating activities 9,880 4,589 5,399 Cash flow from financing activities: Cash dividends paid (5,006) (5,029) (4,969) Purchase of treasury stock (7,589) (185) (112) Sale of treasury stock 1,018 585 643 Net cash used in financing activities (11,577) (4,629) (4,438) Increase (decrease) in cash and cash equivalents (1,697) (40) 961 Cash and cash equivalents at beginning of year 3,938 3,978 3,017 Cash and cash equivalents at end of year $ 2,241 $ 3,938 $ 3,978

FAIR VALUES

FAIR VALUES	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
FAIR VALUES	FAIR VALUES Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) 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: 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 non-qualified deferred compensation plan and securities that have a readily determinable fair market value, are recorded 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 credit risk participations are based on credit default rate assumptions (Level 3 inputs). Assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands): Fair Value Measurement at December 31, 2020 Using Financial Assets: Fair Value Quoted Prices Significant Significant Unobservable Inputs Mortgage-backed securities, residential $ 467,866 $ — $ 467,866 $ — Obligations of states and political subdivisions 43,405 — 43,405 — Corporate bonds and notes 9,035 — 9,035 — SBA loan pools 34,305 — 34,305 — Total available for sale securities $ 554,611 $ — $ 554,611 $ — Equity Investments $ 1,880 $ 1,880 $ — $ — Derivative assets 14,702 — 14,702 — Financial Liabilities: Derivative liabilities $ 15,059 $ — $ 14,702 $ 357 Fair Value Measurement at December 31, 2019 Using Financial Assets: Fair Value Quoted Prices Significant Other Observable Inputs Significant Unobservable Inputs Mortgage-backed securities, residential $ 225,234 $ — $ 225,234 $ — Obligations of states and political subdivisions 42,845 — 42,845 — Corporate bonds and notes 250 — 250 — SBA loan pools 15,761 — 15,761 — Total available for sale securities $ 284,090 $ — $ 284,090 $ — Equity investments $ 1,442 $ 1,442 $ — $ — Derivative assets 6,466 — 6,466 — Financial Liabilities: Derivative liabilities $ 6,831 $ — $ 6,466 $ 365 There were no transfers between Level 1 and Level 2 during the twelve month periods ending December 31, 2020 and 2019. The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31: Assets (Liabilities) Derivative Liabilities (in thousands) 2020 2019 Balance of recurring Level 3 assets at January 1 $ (365) $ (140) Derivative instruments entered into (52) (43) Total gains or losses for the period: Included in earnings - other non-interest income 60 (182) Balance of recurring Level 3 assets at December 31 $ (357) $ (365) The following table presents information related to Level 3 recurring fair value measurement at December 31, 2020 and December 31, 2019 (in thousands): Description Fair Value at December 31, Valuation Technique Unobservable Inputs Range Derivative liabilities $ 357 Historical trend Credit default rate 0.93% - 27.78% [2.27%] Description Fair Value at December 31, Valuation Technique Unobservable Inputs Range Derivative liabilities $ 365 Historical trend Credit default rate 7.30% - 7.30% [7.30%] Assets and liabilities measured at fair value on a non-recurring basis are summarized below (in thousands): Fair Value Measurement at December 31, 2020 Using Financial Assets: Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) Impaired Loans: Commercial mortgages: Commercial mortgages $ — $ — $ — $ — $ — Total impaired loans $ — $ — $ — $ — $ — Other real estate owned: Commercial mortgages: Commercial mortgages $ 111 $ — $ — $ 111 $ — Residential mortgages 126 — — 126 — Total other real estate owned, net $ 237 $ — $ — $ 237 $ — Fair Value Measurement at December 31, 2019 Using Financial Assets: Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) Impaired Loans: Commercial mortgages: Commercial mortgages $ 1,554 $ — $ — $ 1,554 $ (1,597) Total impaired loans $ 1,554 $ — $ — $ 1,554 $ (1,597) Other real estate owned: Commercial mortgages: Commercial mortgages $ 111 $ — $ — $ 111 $ — Residential mortgages 284 — — 284 (12) Consumer loans: Home equity lines and loans 122 — — 122 — Total other real estate owned, net $ 517 $ — $ — $ 517 $ (12) The following table presents information related to Level 3 non-recurring fair value measurement at December 31, 2020 and 2019 (in thousands): Asset Fair Value at December 31, 2020 Valuation Technique Unobservable Inputs Range OREO: Commercial mortgages: Commercial mortgages $ 111 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] Residential mortgages 126 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] $ 237 Asset Fair Value at December 31, 2019 Valuation Technique Unobservable Inputs Range Impaired loans: Commercial mortgages: Commercial mortgages $ 1,554 Sales comparison Discount to appraised value 10.00% - 10.00% [10.00%] $ 1,554 OREO: Commercial mortgages: Commercial mortgages $ 111 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] Residential mortgages 284 Sales comparison Discount to appraised value 20.80% - 35.29% [24.09%] Consumer loans: Home equity lines and loans 122 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] $ 517 FAIR VALUE OF FINANCIAL INSTRUMENTS The carrying amounts and estimated fair values of other financial instruments, at December 31, 2020 and December 31, 2019, are as follows (in thousands): Fair Value Measurements at December 31, 2020 Using Financial assets: Carrying Amount Quoted Prices Significant Other Observable Inputs Significant Unobservable Inputs Estimated Cash and due from financial institutions $ 29,467 $ 29,467 $ — $ — $ 29,467 Interest-bearing deposits in other financial institutions 79,071 79,071 — — 79,071 Equity investments 2,542 2,542 — — 2,542 Securities available for sale 554,611 — 554,611 — 554,611 Securities held to maturity 2,469 — 2,175 326 2,501 FHLBNY and FRBNY stock 3,150 — — — N/A Loans, net and loans held for sale 1,515,709 — — 1,514,318 1,514,318 Accrued interest receivable 6,271 — 1,356 4,915 6,271 Derivative assets 14,702 — 14,702 — 14,702 Financial liabilities: Deposits: Demand, savings, and insured money market accounts $ 1,752,043 $ 1,752,043 $ — $ — $ 1,752,043 Time deposits 285,731 — 288,398 — 288,398 Accrued interest payable 262 11 251 — 262 Derivative liabilities 15,059 — 14,702 357 15,059 (1) Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair Value Measurements at December 31, 2019 Using Financial Assets: Carrying Amount Quoted Prices Significant Other Observable Inputs Significant Unobservable Inputs Estimated Cash and due from financial institutions $ 25,203 $ 25,203 $ — $ — $ 25,203 Interest-bearing deposits in other financial institutions 96,701 96,701 — — 96,701 Equity investments 2,174 2,174 — — 2,174 Securities available for sale 284,090 — 284,090 — 284,090 Securities held to maturity 3,115 — 2,094 1,045 3,139 FHLBNY and FRBNY stock 3,099 — — — N/A Loans, net and loans held for sale 1,286,926 — — 1,285,215 1,285,215 Accrued interest receivable 4,633 63 885 3,685 4,633 Derivative assets 6,466 — 6,466 — 6,466 Financial liabilities: Deposits: Demand, savings, and insured money market accounts $ 1,410,962 $ 1,410,962 $ — $ — $ 1,410,962 Time deposits 161,176 — 163,761 — 163,761 Accrued interest payable 299 27 272 — 299 Derivative liabilities 6,831 — 6,466 365 6,831 (1) Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

REGULATORY CAPITAL REQUIREMENTS

REGULATORY CAPITAL REQUIREMENTS	12 Months Ended
	Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
REGULATORY CAPITAL REQUIREMENTS	REGULATORY CAPITAL REQUIREMENTS The Bank is subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. The final rules implementing Basel III rules became effective for the Bank on January 1, 2015 with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. Under Basel III rules, the Bank must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. The net unrealized gain or loss on available for sale securities and changes in the funded status of the defined benefit pension plan and other benefit plans are not included in computing regulatory capital. Management believes as of December 31, 2020, the Bank met all capital adequacy requirements to which they are subject. Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required. At December 31, 2019, the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. At December 31, 2019, the most recent regulatory notifications categorized the Corporation and the Bank as well capitalized under the regulatory framework for prompt corrective action. The Corporation is no longer subject to FRB consolidated capital requirements applicable to bank holding companies, which are similar to those applicable to the Bank, until it reaches $3.0 billion in assets. There are no conditions or events since that notification that management believes have changed the institution's category. As of December 31, 2020, the most recent notification from the Federal Reserve Bank of New York categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized the Bank must maintain minimum total risk-based, Tier 1 risk-based, common equity Tier 1 risk-based and Tier 1 leverage ratios as set forth in the table below. There have been no conditions or events since that notification that management believes have changed the Bank's or the Corporation's capital category. The Corporation’s principal source of funds for dividend payments is dividends received from the Bank. Banking regulations limit the amount of dividends that may be paid without prior approval of regulatory agencies. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the current year’s net income, combined with the retained net income of the preceding two years, subject to the capital requirements in the table below. During 2021, the Bank could, without prior approval, declare dividends of approximately $36.1 million plus any 2021 net income retained to the date of the dividend declaration. The actual capital amounts and ratios of the Corporation and the Bank are presented in the following tables (in thousands): Actual Minimal Capital Adequacy Minimal Capital Adequacy with Capital Buffer To Be Well As of December 31, 2020 Amount Ratio Amount Ratio Amount Ratio Amount Ratio Total Capital (to Risk Weighted Assets): Consolidated $ 192,960 13.62 % N/A N/A N/A N/A N/A N/A Bank $ 185,606 13.12 % $ 113,182 8.00 % $ 148,551 10.50 % $ 141,478 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 175,216 12.37 % N/A N/A N/A N/A N/A N/A Bank $ 167,881 11.87 % $ 84,887 6.00 % $ 120,256 8.50 % $ 113,182 8.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 175,216 12.37 % N/A N/A N/A N/A N/A N/A Bank $ 167,881 11.87 % $ 63,665 4.50 % $ 99,034 7.00 % $ 91,960 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 175,216 7.90 % N/A N/A N/A N/A N/A N/A Bank $ 167,881 7.59 % $ 88,474 4.00 % N/A N/A $ 110,592 5.00 % Actual Minimum Capital Adequacy Minimal Capital Adequacy with Capital Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions As of December 31, 2019 Amount Ratio Amount Ratio Amount Ratio Amount Ratio Total Capital (to Risk Weighted Assets): Consolidated $ 182,239 13.98 % N/A N/A N/A N/A N/A N/A Bank $ 175,062 13.45 % $ 104,136 8.00 % $ 136,679 10.50 % $ 130,170 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 165,859 12.73 % N/A N/A N/A N/A N/A N/A Bank $ 158,702 12.19 % $ 78,102 6.00 % $ 110,645 8.50 % $ 104,136 8.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 165,859 12.73 % N/A N/A N/A N/A N/A N/A Bank $ 158,702 12.19 % $ 58,577 4.50 % $ 91,119 7.00 % $ 84,611 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 165,859 9.35 % N/A N/A N/A N/A N/A N/A Bank $ 158,702 8.98 % $ 70,719 4.00 % N/A N/A $ 88,399 5.00 %

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS	ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS Accumulated other comprehensive income or loss represents the net unrealized holding gains or losses on securities available for sale and the funded status of the Corporation's defined benefit pension plan and other benefit plans, as of the consolidated balance sheet dates, net of the related tax effect. The following is a summary of the changes in accumulated other comprehensive income or loss by component, net of tax, for the periods indicated (in thousands): Unrealized Gains and Losses on Securities Available for Sale Defined Benefit and Other Benefit Plans Total Balance at January 1, 2020 $ 1,368 $ (7,167) $ (5,799) Other comprehensive income before reclassification 7,759 377 8,136 Amounts reclassified from accumulated other comprehensive income (loss) — 64 64 Net current period other comprehensive income (loss) 7,759 441 8,200 Balance at December 31, 2020 $ 9,127 $ (6,726) $ 2,401 Unrealized Gains and Losses on Securities Available for Sale Defined Benefit and Other Benefit Plans Total Balance at January 1, 2019 $ (4,646) $ (6,765) $ (11,411) Other comprehensive income (loss) before reclassification 6,028 (467) 5,561 Amounts reclassified from accumulated other comprehensive income (loss) (14) 65 51 Net current period other comprehensive income (loss) 6,014 (402) 5,612 Balance at December 31, 2019 $ 1,368 $ (7,167) $ (5,799) Unrealized Gains and Losses on Securities Available for Sale Defined Benefit and Other Benefit Plans Total Balance at Balance at December 31, 2017 $ (3,415) $ (6,925) $ (10,340) Cumulative effect of accounting change (202) — (202) Balance at January 1, 2018 (3,617) (6,925) (10,542) Other comprehensive income (loss) before reclassification (1,029) (530) (1,559) Amounts reclassified from accumulated other comprehensive income (loss) — 690 690 Net current period other comprehensive loss (1,029) 160 (869) Balance at December 31, 2018 $ (4,646) $ (6,765) $ (11,411) The following is the reclassification out of accumulated other comprehensive income (loss) for the periods indicated (in thousands): Details about Accumulated Other Comprehensive Income (Loss) Components Year Ended December 31, Affected Line Item 2020 2019 2018 Unrealized gains and losses on securities available for sale: Realized gains on securities available for sale $ — $ (19) $ — Net gains on securities transactions Tax effect — 5 — Income tax expense Net of tax — (14) — Amortization of defined pension plan and other benefit plan items: Prior service costs (a) (220) (220) (220) Other components of net periodic pension and postretirement benefits Actuarial losses (a) 300 312 1,146 Other components of net periodic pension and postretirement benefits Tax effect (15) (27) (236) Income tax expense Net of tax 65 65 690 Total reclassification for the period, net of tax $ 65 $ 51 $ 690 (a) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension and other benefit plan costs (see Note 14 for additional information).

SEGMENT REPORTING

SEGMENT REPORTING	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
SEGMENT REPORTING	SEGMENT REPORTING The Corporation manages its operations through two primary business segments: core banking and WMG. The core banking segment provides revenues by attracting deposits from the general public and using such funds to originate consumer, commercial, commercial real estate, and residential mortgage loans, primarily in the Corporation’s local markets and to invest in securities. The WMG services segment provides revenues by providing trust and investment advisory services to clients. Accounting policies for the segments are the same as those described in Note 1. Summarized financial information concerning the Corporation’s reportable segments and the reconciliation to the Corporation’s consolidated results are shown in the following table. Income taxes are allocated based on the separate taxable income of each entity and indirect overhead expenses are allocated based on reasonable and equitable allocations applicable to the reportable segment. The Holding Company, CFS, and CRM column below includes amounts to eliminate transactions between segments as well as income and expenses related to insurance products, mutual funds, brokerage services, and captive insurance (in thousands). Year ended December 31, 2020 Core Banking WMG Holding Company, CFS and CRM Consolidated Totals Interest and dividend income $ 66,849 $ — $ 58 $ 66,907 Interest expense 3,988 — — 3,988 Net interest income 62,861 — 58 62,919 Provision for loan losses 4,239 — — 4,239 Net interest income after provision for loan losses 58,622 — 58 58,680 Non-interest income 10,982 9,492 650 21,124 Non-interest expenses 48,479 6,283 1,173 55,935 Income (loss) before income tax expense 21,125 3,209 (465) 23,869 Income tax expense (benefit) 3,952 824 (169) 4,607 Segment net income (loss) $ 17,173 $ 2,385 $ (296) $ 19,262 Segment assets $ 2,271,923 $ 3,231 $ 4,297 $ 2,279,451 Year ended December 31, 2019 Core Banking WMG Holding Company, CFS and CRM Consolidated Totals Interest and dividend income $ 66,868 $ — $ 64 $ 66,932 Interest expense 6,321 — — 6,321 Net interest income 60,547 — 64 60,611 Provision for loan losses 5,945 — — 5,945 Net interest income after provision for loan losses 54,602 — 64 54,666 Non-interest income 10,356 9,503 214 20,073 Non-interest expenses 48,213 6,326 1,157 55,696 Income (loss) before income tax expense 16,745 3,177 (879) 19,043 Income tax expense (benefit) 2,778 810 (154) 3,434 Segment net income (loss) $ 13,967 $ 2,367 $ (725) $ 15,609 Segment assets $ 1,780,401 $ 3,345 $ 4,082 $ 1,787,827 Year ended December 31, 2018 Core Banking WMG Holding Company and CFS Consolidated Totals Interest and dividend income $ 64,511 $ — $ 42 $ 64,553 Interest expense 4,073 — — 4,073 Net interest income 60,438 — 42 60,480 Provision for loan losses 3,153 — — 3,153 Net interest income after provision for loan losses 57,285 — 42 57,327 Non-interest income 13,597 9,317 160 23,074 Non-interest expenses 49,650 5,997 1,119 56,766 Income (loss) before income tax expense 21,232 3,320 (917) 23,635 Income tax expense (benefit) 3,329 847 (167) 4,009 Segment net income (loss) $ 17,903 $ 2,473 $ (750) $ 19,626 Segment assets $ 1,747,208 $ 3,606 $ 4,529 $ 1,755,343

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
ORGANIZATION	ORGANIZATION The Corporation, through its wholly owned subsidiaries, the Bank and CFS Group, Inc., provides a wide range of banking, financing, fiduciary and other financial services to its clients. The Corporation is subject to the regulations of certain federal and state agencies and undergoes periodic examinations by those regulatory agencies. 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 consolidated financial statements have been prepared in conformity with GAAP and include the accounts of the Corporation and its subsidiaries. All significant intercompany balances and transactions are eliminated in consolidation. 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.
CASH AND CASH EQUIVALENTS	CASH AND CASH EQUIVALENTS Cash and cash equivalents include cash and amounts due from banks and demand interest-bearing deposits with other financial institutions. Time deposits with other financial institutions are classified as held-to-maturity securities and are not included in cash and cash equivalents.
EQUITY INVESTMENTS	EQUITY INVESTMENTS On January 1, 2018, the Corporation adopted ASU 2016-01, an amendment to Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10) , which requires equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. The adoption of this guidance resulted in a $40 thousand increase to beginning retained earnings and a $202 thousand decrease to beginning accumulated other comprehensive income (loss).
SECURITIES	SECURITIES Management determines the appropriate classification of securities at the time of purchase. If management has the intent and the Corporation has the ability at the time of purchase to hold securities until maturity, they are classified as held to maturity and carried at amortized cost. Securities to be held for indefinite periods of time or not intended to be held to maturity are classified as available for sale and carried at fair value. Unrealized holding gains and losses on securities classified as available for sale are excluded from earnings and are reported as accumulated other comprehensive income (loss) in shareholders' equity, net of the related tax effects, until realized. Realized gains and losses are determined using the specific identification method. Management evaluates securities for OTTI on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. For equity securities, the entire amount of impairment is recognized through earnings. In order to determine OTTI for purchased beneficial interests that, on the purchase date, were not highly rated, the Corporation compares the present value of the remaining cash flows as estimated at the preceding evaluation date to the current expected remaining cash flows. OTTI is deemed to have occurred if there has been an adverse change in the remaining expected future cash flows. Premiums and discounts are amortized or accreted over the life of the related security as an adjustment of yield using the interest method. Dividend and interest income is recognized when collected.
FEDERAL HOME LOAN BANK AND FEDERAL RESERVE BANK STOCK	FEDERAL HOME LOAN BANK AND FEDERAL RESERVE BANK STOCK The Bank is a member of both the FHLBNY and the FRBNY. FHLBNY members are required to own a certain amount of stock based on the level of borrowings and other factors, while FRBNY members are required to own a certain amount of stock based on a percentage of the Bank’s capital stock and surplus. FHLBNY and FRBNY stock are carried at cost and classified as non-marketable equities and periodically evaluated for impairment based on ultimate recovery of par value. Cash dividends are reported as income.
LOANS	LOANS Loans are stated at the amount of unpaid principal balance net of deferred loan fees. Additionally, recorded investment in loans includes interest receivable on loans. The Corporation has the ability and intent to hold its loans for the foreseeable future. The Corporation’s loan portfolio is comprised of the following segments: (i) commercial and agricultural, (ii) commercial mortgages, (iii) residential mortgages, and (iv) consumer loans. Commercial and agricultural loans primarily consist of loans to small to mid-sized businesses in the Corporation’s market area in a diverse range of industries. These loans are typically made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. Commercial mortgage loans are generally non-owner occupied commercial properties or owner occupied commercial real estate with larger balances. Repayment of these loans is often dependent upon the successful operation and management of the properties and the businesses occupying the properties, as well as on the collateral securing the loan. Residential mortgage loans are generally made on the basis of the borrower’s ability to make repayment from their employment and other income, but are secured by real property. Consumer loans include home equity lines of credit and home equity loans, which exhibit many of the same characteristics as residential mortgages. Indirect and other consumer loans are typically secured by depreciable assets, such as automobiles or boats, and are dependent on the borrower’s continuing financial stability. Interest on loans is accrued and credited to operations using the interest method. Past due status is based on the contractual terms of the loan. The accrual of interest is generally discontinued and previously accrued interest is reversed when loans become 90 days delinquent. Loans may also be placed on non-accrual status if management believes such classification is otherwise warranted. All payments received on non-accrual loans are applied to principal. Loans are returned to accrual status when they become current as to principal and interest and remain current for a period of six consecutive months or when, in the opinion of management, the Corporation expects to receive all of its original principal and interest. Loan origination fees and certain direct loan origination costs are deferred and amortized over the life of the loan as an adjustment to yield, using the interest method.
TROUBLED DEBT RESTRUCTURINGS	TROUBLED DEBT RESTRUCTURINGS A TDR is a formally renegotiated loan in which the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that would not have been granted to the borrower otherwise. Not all loans that are restructured as a TDR are classified as non-accrual before the restructuring occurs. Restructured loans can convert from non-accrual to accrual status when said loans have demonstrated performance, generally evidenced by six months of payment performance in accordance with the restructured terms and when, in the opinion of management, the Bank expects to receive all of its contractual principal and interest due under the restructured terms. TDRs are individually evaluated for impairment and included in the separately identified impairment disclosures. TDRs are measured at the present value of estimated future cash flows using the loan's effective rate at inception. If a TDR is considered to be a collateral dependent loan, the loan is reported, net, at the fair value of the collateral. For TDRs that subsequently default, the Bank determines the amount of the allowance on that loan in accordance with the accounting policy for the allowance for loan losses on loans individually identified as impaired. The Bank incorporates recent historical experience related to TDRs, including the performance of TDRs that subsequently default, into the calculation of the allowance by loan portfolio segment. Section 4013 of the CARES Act, signed into law of March 27, 2020, gives entities temporary relief from the accounting and disclosure requirements for troubled debt restructurings (TDRs) under ASC 310-40, Receivables: Troubled Debt Restructurings by Creditors, in certain situations. Section 4013 of the CARES Act permits the suspension of ASC 310-40 for loan modifications that are made by financial institutions in response to the COVID-19 pandemic if (1) the borrower was not more than 30 days past due as of December 31, 2019, and (2) the modifications are related to arrangements that defer or delay the payment of principal or interest, or change the interest rate on the loan. All loan modifications made by the Corporation in response to the COVID-19 pandemic have been in accordance with Section 4013 of the CARES Act.
ALLOWANCE FOR LOAN LOSSES	ALLOWANCE FOR LOAN LOSSES The allowance is an amount that management believes will be adequate to absorb probable incurred credit losses on existing loans. The allowance is established based on management’s evaluation of the probable incurred credit losses in our portfolio in accordance with GAAP, and is comprised of both specific valuation allowances and general valuation allowances. A loan is classified as impaired when, based on current information and events, it is probable that the Bank will be unable to collect both the principal and interest due under the contractual terms of the loan agreement. Specific valuation allowances are established based on management’s analysis of individually impaired loans. Factors considered by management in determining impairment include payment status, evaluations of the underlying collateral, expected cash flows, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. If a loan is determined to be impaired and is placed on nonaccrual status, all future payments received are applied to principal and a portion of the allowance is allocated so that the loan is reported, net, at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral if repayment is expected solely from the collateral. The general component covers non-impaired loans and is based on historical loss experience adjusted for current factors. Loans not impaired but classified as substandard and special mention use a historical loss factor on a rolling five year history of net losses. For all other unclassified loans, the historical loss experience is determined by portfolio class and is based on the actual loss history experienced by the Bank over the most recent two years. This actual loss experience is supplemented with other qualitative factors based on the risks present for each portfolio class. These qualitative factors include consideration of the following: (1) lending policies and procedures, including underwriting standards and collection, charge-off and recovery policies, (2) national and local economic and business conditions and developments, including the condition of various market segments, (3) loan profiles and volume of the portfolio, (4) the experience, ability, and depth of lending management and staff, (5) the volume and severity of past due, classified and watch-list loans, non-accrual loans, troubled debt restructurings, and other modifications (6) the quality of the Bank’s loan review system and the degree of oversight by the Bank’s Board of Directors, (7) collateral related issues: secured vs. unsecured, type, declining valuation environment and trend of other related factors, (8) the existence and effect of any concentrations of credit, and changes in the level of such concentrations, (9) the effect of external factors, such as competition and legal and regulatory requirements, on the level of estimated credit losses in the Bank’s current portfolio and (10) the impact of the global economy. The allowance for loan losses is increased through a provision for loan losses charged to operations. Loans are charged against the allowance for loan losses when management believes that the collectability of all or a portion of the principal is unlikely. Management's evaluation of the adequacy of the allowance for loan losses is performed on a periodic basis and takes into consideration such factors as the credit risk grade assigned to the loan, historical loan loss experience and review of specific
LOANS HELD FOR SALE	LOANS HELD FOR SALE Certain mortgage loans are originated with the intent to sell. The Bank typically retains the right to service the mortgages upon sale. Loans held for sale are recorded at the lower of cost or fair value in the aggregate and are regularly evaluated for changes in fair value. Commitments to sell the loans that are originated for sale are recorded at fair value. If necessary, a valuation allowance is established with a charge to income for unrealized losses attributable to a change in market rates.
CAPITAL LEASES	CAPITAL LEASES Capital leases are recorded at the lesser of the present value of future cash outlays using a discounted cash flow, or fair value at the beginning of the lease term. Initially, the capital lease is recorded as a building asset, which is depreciated over the shorter of the term of the lease or the estimated life of the asset, and a corresponding long term lease obligation, which amortizes as payments are made toward the lease. Interest expense is also incurred using the discount rate determined at the beginning of the lease term.
PREMISES AND EQUIPMENT	PREMISES AND EQUIPMENT Land is carried at cost, while buildings, equipment, leasehold improvements and furniture are stated at cost less accumulated depreciation and amortization. Depreciation is charged to current operations under the straight-line method over the estimated useful lives of the assets, which range from 15 to 50 years for buildings and from 3 to 10 years for equipment and furniture. Amortization of leasehold improvements and leased equipment is recognized on the straight-line method over the shorter of the lease term or the estimated life of the asset. Leases of branch offices, which have been capitalized, are included within buildings and depreciated on the straight-line method over the shorter of the lease term or the estimated life of the asset.
BANK OWNED LIFE INSURANCE	BANK OWNED LIFE INSURANCE BOLI is recorded at the amount that can be realized under the insurance contracts at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement. Changes in the cash surrender value are recorded in other income.
OTHER REAL ESTATE	OTHER REAL ESTATE Real estate acquired through foreclosure or deed in lieu of foreclosure is recorded at estimated fair value of the property less estimated costs to dispose at the time of acquisition to establish a new carrying value. Write downs from the carrying value of the loan to estimated fair value which are required at the time of foreclosure are charged to the allowance for loan losses. Subsequent adjustments to the carrying values of such properties resulting from declines in fair value are charged to operations in the period in which the declines occur.
INCOME TAXES	INCOME TAXES The Corporation files a consolidated tax return. Deferred tax assets and liabilities are recognized for future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and for unused tax loss carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates to apply to taxable income in the years in which temporary differences are expected to be recovered or settled, or the tax loss carry forwards are expected to be utilized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is "more likely than not" that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the "more likely than not" test, no tax benefit is recorded.
WEALTH MANAGEMENT GROUP FEE INCOME	WEALTH MANAGEMENT GROUP FEE INCOMEAssets held in a fiduciary or agency capacity for customers are not included in the accompanying consolidated balance sheets, since such assets are not assets of the Corporation. Wealth Management Group income is recognized on the accrual method as earned based on contractual rates applied to the balances of individual trust accounts.
POSTRETIREMENT BENEFITS	POSTRETIREMENT BENEFITS Pension Plan: The Chemung Canal Trust Company Pension Plan is a non-contributory defined benefit pension plan. The Pension Plan is a “qualified plan” under the IRS Code and therefore must be funded. Contributions are deposited to the Plan and held in trust. The Plan assets may only be used to pay retirement benefits and eligible plan expenses. The plan was amended such that new employees hired on or after July 1, 2010 would not be eligible to participate in the plan, however, existing participants at that time would continue to accrue benefits. Under the Plan, pension benefits are based upon final average annual compensation where the annual compensation is total base earnings paid plus 401(k) salary deferrals. Bonuses, overtime, commissions and dividends are excluded. The normal retirement benefit equals 1.2% of final average compensation (highest consecutive five years of annual compensation in the prior ten years) times years of service (up to a maximum of 25 years), plus 1% of average monthly compensation for each additional year of service (up to a maximum of 10 years), plus 0.65% of average monthly compensation in excess of covered compensation for each year of credited service up to 35 years. Covered compensation is the average of the social security taxable wage base in effect for the 35 year period prior to normal social security retirement age. Compensation for purposes of determining benefits under the Plan is reviewed annually. On October 20, 2016, the Corporation amended its noncontributory defined benefit pension plan (“pension plan”) to freeze future retirement benefits after December 31, 2016. Beginning on January 1, 2017, both the pay-based and service-based component of the formula used to determine retirement benefits in the pension plan were frozen so that participants will no longer earn further retirement benefits. During the fourth quarter of 2018, the Corporation offered terminated, vested employees the option to receive lump sum settlement payments. The effects of these changes are reflected in the pension plan disclosures as of December 31, 2018. See Note 14 for further details. Defined Contribution Profit Sharing, Savings and Investment Plan: The Corporation also sponsors a 401(K) defined contribution profit sharing, savings and investment plan which covers all eligible employees. The Corporation contributes a non-discretionary 3% of gross annual wages (as defined by the 401(k) plan) for each participant, regardless of the participant’s deferral, in addition to a 50% match up to 6% of gross annual wages. All contributions made on or after January 1, 2017 will vest immediately, while all previous contributions continue vesting on a five-year vesting schedule. The plan's assets consist of Chemung Financial Corporation common stock, as well as other common and preferred stocks, U.S. Government securities, corporate bonds and notes, and mutual funds. The plan’s expense is the amount of non-discretionary and matching contributions and is charged to non-interest expenses in the consolidated statements of income. Defined Benefit Health Care Plan: The Corporation sponsors a defined benefit health care plan that provides postretirement medical benefits to employees who meet minimum age and service requirements. This plan was amended effective July 1, 2006. Prior to this amendment, all retirees age 55 or older were eligible for coverage under the Corporation's self-insured health care plan, contributing 40% of the cost of the coverage. Under the amended plan, coverage for Medicare eligible retirees who reside in the Central New York geographic area is provided under a group sponsored plan with Excellus BlueCross BlueShield called Medicare Blue PPO, with the retiree paying 100% of the premium. Excellus BlueCross BlueShield assumes full liability for the payment of health care benefits incurred after July 1, 2006. Current Medicare eligible retirees who reside outside of the Central New York geographic area were eligible for coverage under the Corporation's self-insurance plan through December 31, 2009, contributing 50% of the cost of coverage. Effective January 1, 2010, these out of area retirees were eligible for coverage under a Medicare Supplement Plan C administered by Excellus BlueCross BlueShield, contributing 50% of the premium. Current retirees between the ages of 55 and 65, will continue to be eligible for coverage under the Corporation's self-insured plan, contributing 50% of the cost of the coverage. Employees who retired after July 1, 2006, and become Medicare eligible will only have access to the Medicare Blue PPO plan. Additionally, effective July 1, 2006, dental benefits were eliminated for all retirees. The cost of the plan is based on actuarial computations of current and future benefits for employees, and is charged to non-interest expenses in the consolidated statements of income. On October 20, 2016, the Corporation amended its defined benefit health care plan to not allow any new retirees into the plan, effective January 1, 2017. The effects of this freeze are reflected in the pension plan disclosures as of December 31, 2019 and 2018. See Note 14. Executive Supplemental Pension Plan: U.S. laws place limitations on compensation amounts that may be included under the Pension Plan. The Executive Supplemental Pension Plan was provided to executives in order to produce total retirement benefits, as a percentage of compensation that is comparable to employees whose compensation is not restricted by the annual compensation limit. Pension amounts, which exceed the applicable Internal Revenue Service code limitations, will be paid under the Executive Supplemental Pension Plan. The Executive Supplemental Pension Plan is a “non-qualified plan” under the Internal Revenue Service Code. Contributions to the Plan are not held in trust; therefore, they may be subject to the claims of creditors in the event of bankruptcy or insolvency. When payments come due under the Plan, cash is distributed from general assets. The cost of the plan is based on actuarial computations of current and future benefits for executives, and is charged to non-interest expense in the consolidated statements of income. Defined Contribution Supplemental Executive Retirement Plan: The Defined Contribution Supplemental Executive Retirement Plan is provided to certain executives to motivate and retain key management employees by providing a nonqualified retirement benefit that is payable at retirement, disability, death and certain other events. The Supplemental Executive Retirement Plan is intended to be an unfunded plan maintained primarily for the purpose of providing deferred compensation benefits for a select group of management or highly compensated employees under Sections 201(2), 301(a)(3) and 401(a)(1) of the Employee Retirement Income Security Act of 1974. The plan’s expense is the Corporation’s annual contribution plus interest credits.
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION Restricted Stock Plan: The Restricted Stock Plan is designed to align the interests of the Corporation’s executives and senior managers with the interests of the Corporation and its shareholders, to ensure the Corporation’s compensation practices are competitive and comparable with those of its peers, and to promote the retention of select management-level employees. Under the terms of the Plan, the Corporation may make discretionary grants of restricted shares of the Corporation’s common stock to or for the benefit of employees selected to participate in the Plan. Each officer of the Corporation, other than the Corporation’s chief executive officer, is eligible to participate in the Plan. Awards are based on the performance, responsibility and contributions of the employee and are targeted at an average of the peer group. The maximum number of shares of the Corporation’s common stock that may be awarded as restricted shares to Plan participants may not exceed 15,000 per calendar year. Twenty percent of the restricted stock awarded to a participant vests each year commencing with the first anniversary date of the award and is 100 percent vested on the fifth anniversary date. Except in the case of the participant’s death, disability, or in the event of a change in control, the participant’s unvested shares of unrestricted stock will be forfeited if the participant leaves the employment of the Bank, or if the participant retires prior to attainment of age 65, unless otherwise waived by the Compensation and Personnel Committee of the Board of Directors. The plan’s expense is recognized as compensation expense ratably over the vesting period for the fair value of the award, measured at the grant date. See Note 15 for more information regarding this Plan. Deferred Directors Fee Plan: A Deferred Directors Fee Plan for non-employee directors provides that directors may elect to defer receipt of all or any part of their fees. Deferrals are either credited with interest compounded quarterly at the Applicable Federal Rate for short-term debt instruments or converted to units, which appreciate or depreciate, as would an actual share of the Corporation’s common stock purchased on the deferral date. Cash deferrals will be paid into an interest bearing account and paid in cash. Units will be paid in shares of common stock. All directors’ fees are charged to non-interest expenses in the consolidated statements of income. Directors’ Compensation Plan: The purpose of the Directors’ Compensation Plan is to enable the Corporation to attract and retain persons of exceptional ability to serve as directors and stockholders in enhancing the value of the common stock of the Corporation. The Plan was originally established to provide for the cash payment of an annual retainer and fees to non-employee directors serving on the Board of Directors of the Corporation and the Bank. The Plan was subsequently amended to provide: (i) payment of additional compensation to each non-employee director in shares of the Corporation’s common stock in an amount equal to the total cash compensation earned by each non-employee director during the year for service on the Board of Directors of each of the Corporation and the Bank, and for each year of service thereafter, to be distributed from treasury shares in January of the following calendar year; and (ii) payment to the President and CEO of the Corporation and the Bank for his service on the Boards of Directors of the Corporation and the Bank in an amount equal in value to the average cash compensation awarded to non-employee directors who have served twelve st of the calendar year. The cost of all cash and stock compensation is charged to non-interest expenses in the consolidated statements of income. In 2019, the annual cash retainer paid to each non-employee director of the Corporation was increased by $6,000 to $11,500 and $19,250 for the Chairman of the Board. The retainer for the Chairman of the Audit Committee was also increased by an additional $2,875 to $14,375. The directors waived their right to stock compensation for the additional retainer fees paid. Incentive Compensation Plan: The purpose of the Incentive Compensation Plan is to attract and retain highly qualified officers and key employees, and to motivate such persons to serve the Corporation and the Bank and to expend maximum effort to improve the business results and earnings of the Corporation by providing to such persons an opportunity to acquire or increase a direct proprietary interest in the operations and future success of the Corporation. To this end, the Incentive Compensation Plan provides for the discretionary grant of cash and/or unrestricted stock, i.e., common stock of the Corporation that is free of any restrictions, such as restrictions on transferability, to select officers and key employees as designated by the Board of Directors in its sole discretion. The maximum number of shares that can be awarded as unrestricted stock under the Incentive Compensation Plan to any individual is 10,000 per calendar year; and the maximum amount that may be earned in cash as an Incentive Award in any calendar year by any individual is $300,000. The right of any eligible employee to receive a grant of an incentive award, whether in the form of cash or unrestricted stock, is subject to performance standards that are specified by either the Compensation Committee or the Board of Directors. The cost of all cash and unrestricted stock compensation is charged to non-interest expenses in the consolidated statements of income. Non-qualified Deferred Compensation Plan: The Deferred Compensation Plan allows a select group of management and employees to defer all or a portion of their annual compensation to a future date. Eligible employees are generally highly compensated employees and are designated by the Board of Directors from time to time. Investments in the plan are recorded as equity investments and deferred amounts are an unfunded liability of the Corporation. The plan requires deferral elections be made before the beginning of the calendar year during which the participant will perform the services to which the compensation relates. Participants in the Plan are required to elect a form of distribution, either lump sum payment or annual installments not to exceed ten years, and a time of distribution, either a specified age or a specified date. The terms and conditions for the deferral of compensation are subject to the provisions of 409A of the IRS Code. The income from investments is recorded in dividend income and non-interest income in the consolidated statements of income. The cost of the plan is recorded in non-interest expenses in the consolidated statements of income.
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS Goodwill resulting from business combinations prior to January 1, 2009 represents the excess of the purchase price over the fair value of the net assets of businesses acquired. Goodwill resulting from business combinations after January 1, 2009, is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually. The Corporation has selected December 31 as the date to perform the annual impairment test. Goodwill is the only intangible asset with an indefinite life on our balance sheet. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. The balances are reviewed for impairment on an ongoing basis or whenever events or changes in business circumstances warrant a review of the carrying value. If impairment is determined to exist, the related write-down of the intangible asset's carrying value is charged to operations. Based on these impairment reviews, the Corporation determined that goodwill and other intangible assets were not impaired at December 31, 2020. The Corporation's intangible assets with definite useful lives resulted from the purchase of the trust business of Partners Trust Bank in May of 2007 and the acquisition of FOFC in April 2011 with balances of $0.2 million and $12 thousand, respectively, at December 31, 2020. The intangible assets related to the acquisition of Canton Bancorp, Inc. in May 2009 were fully amortized at December 31, 2016. The intangible assets related to the acquisition of three former M&T Bank branch offices in March 2008 were fully amortized at December 31, 2015. The intangible assets related to the acquisition of six branches of Bank of America in November of 2013, were fully amortized at December 31, 2020. The trust business intangible is being amortized to expense over the expected useful life of 15 years. The identifiable core deposit intangible related to the FOFC acquisition is being amortized using a 10 year accelerated method.
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE	SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE The Corporation enters into sales of securities under agreements to repurchase. The agreements are treated as financings, and the obligations to repurchase securities sold are reflected as liabilities in the consolidated balance sheets. The amount of the securities underlying the agreements continues to be carried in the Corporation's securities portfolio. The Corporation has agreed to repurchase securities identical to those sold. The securities underlying the agreements are under the Corporation's control.
DERIVATIVES	DERIVATIVES The Corporation utilizes interest rate swaps with commercial borrowers and third-party counterparties as well as agreements with lead banks in participation loan relationships wherein the Corporation guarantees a portion of the fair value of an interest rate swap entered into by the lead bank. These transactions are accounted for as derivatives. The Company’s derivatives are entered into in connection with its asset and liability management activities and not for trading purposes. The Company does not have any derivatives that are designated as hedges and therefore all derivatives are considered free standing and are recorded at fair value as derivative assets or liabilities on the consolidated balance sheets, with changes in fair value recognized in the consolidated statements of income as non-interest income. Premiums received when entering into derivative contracts are recognized as part of the fair value of the derivative asset or liability and are carried at fair value with any gain/loss at inception and any changes in fair value reflected in income. The Corporation does not typically require its commercial customers to post cash or securities as collateral on its program of back-to-back interest rate swap program. The Corporation may need to post collateral, either cash or certain qualified securities,
OTHER FINANCIAL INSTRUMENTS	OTHER FINANCIAL INSTRUMENTS The Corporation is a party to certain other financial instruments with off-balance sheet risk such as unused portions of lines of credit and commitments to fund new loans. The Corporation's policy is to record such instruments when funded.
ADVERTISING COSTS	ADVERTISING COSTS Costs for advertising products and services or for promoting our corporate image are expensed as incurred.
EARNINGS PER COMMON SHARE	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 as they are earned. All outstanding unvested share based payment awards that contain rights to nonforfeitable dividends are considered participating securities for this calculation. Restricted stock awards are grants of participating securities. The impact of the participating securities on earnings per share is not material. Earnings per share information is adjusted to present comparative results for stock splits and stock dividends that occur.
COMPREHENSIVE INCOME (LOSS)	COMPREHENSIVE INCOME (LOSS) Comprehensive income (loss) consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes unrealized gains and losses on securities available for sale and changes in the funded status of the Corporation’s defined benefit pension plan and other benefit plans, net of the related tax effect, which are also recognized as separate components of equity.
SEGMENT REPORTING	SEGMENT REPORTING The Corporation has identified separate operating segments and internal financial information is primarily reported and aggregated in two lines of business, banking and wealth management services.
RECLASSIFICATION	RECLASSIFICATION Amounts in the prior years' consolidated financial statements are reclassified whenever necessary to conform to the current year's presentation. Reclassification adjustments had no impact on prior year net income or shareholders' equity.
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS On January 1, 2020, the Corporation adopted ASU 2018-14, Compensation – Retirement Benefits (Topic 715-20 ). This ASU amends ASC 715 to add, remove and clarify disclosure requirements related to defined benefit pension and other postretirement plans. The ASU eliminates the requirement to disclose the amounts in accumulated other comprehensive income expected to be recognized as part of net periodic benefit cost over the next year, and also removes the disclosure requirements for the effects of a one-percentage-point change on the assumed health care costs and the effect of this change in rates on service cost, interest cost and the benefit obligation for postretirement health care benefits. The adoption of the ASU did not have a significant impact on the Corporation's consolidated financial statements. On January 1, 2020, the Corporation adopted 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 adoption of the ASU did not have a significant impact on the Corporation's consolidated financial statements. 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. 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 11 - Revenue from Contracts with Customers for further discussion on the Corporation's accounting policies for revenue sources within the scope of ASC 606. 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 November 2019, the FASB adopted changes 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. 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. The Corporation will adopt CECL effective January 1, 2023. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . The update simplifies how all entities assess goodwill for impairment by eliminating Step 2 from the goodwill impairment test. As amended, the goodwill impairment test will consist of one step comparing the fair value of a reporting unit with its carrying amount. An entity should recognize a goodwill impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The adoption of this guidance, effective January 1, 2020, did not have a material impact on the Company's consolidated financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715) - Improving the Presentation of Net Periodic Cost and Net Periodic Postretirement Benefit Cost . The objective of the ASU was to improve guidance related to the presentation of defined benefit costs in the income statement. Specifically, the ASU 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, the ASU 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 adopted ASU 2017-07 as of January 1, 2018 and 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.
FAIR VALUE	Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) 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: 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 non-qualified deferred compensation plan and securities that have a readily determinable fair market value, are recorded 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 credit risk participations are based on credit default rate assumptions (Level 3 inputs).

SECURITIES (Tables)

SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Estimated Fair Value of Securities Available for Sale	Amortized cost and estimated fair value of securities available for sale at December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Mortgage-backed securities, residential $ 458,245 $ 467,866 $ 225,029 $ 225,234 Obligations of states and political subdivisions 40,662 43,405 41,265 42,845 Corporate bonds and notes 9,000 9,035 250 250 SBA loan pools 34,455 34,305 15,712 15,761 Total $ 542,362 $ 554,611 $ 282,256 $ 284,090 Gross unrealized gains and losses on securities available for sale at December 31, 2020 and 2019, were as follows (in thousands): 2020 2019 Unrealized Unrealized Unrealized Unrealized Mortgage-backed securities, residential $ 9,822 $ 201 $ 1,471 $ 1,266 Obligations of states and political subdivisions 2,743 — 1,580 — Corporate bonds and notes 47 12 — — SBA loan pools 42 192 95 46 Total $ 12,654 $ 405 $ 3,146 $ 1,312
Amortized Cost and Estimated Fair Value of Debt Securities Available for Sale by Contractual Maturity	Securities not due at a single maturity date are shown separately (in thousands): December 31, 2020 Amortized Fair Within one year After one, but within five years 27,215 28,757 After five, but within ten years 21,688 22,875 After ten years 759 808 Mortgage-backed securities, residential 458,245 467,866 SBA loan pools 34,455 34,305 Total $ 542,362 $ 554,611
Proceeds from Sales and Calls of Securities Resulting in Gains or Losses	The proceeds from sales and calls of securities resulting in gains or losses are listed below (in thousands): 2020 2019 2018 Proceeds $ — $ 8,513 $ — Gross gains $ — $ 159 $ — Gross losses $ — $ (140) $ — Tax expense $ — $ 5 $ —
Amortized Cost and Estimated Fair Value of Securities Held to Maturity	Amortized cost and estimated fair value of securities held to maturity at December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Obligations of states and political subdivisions $ 326 $ 326 $ 1,045 $ 1,045 Time deposits with other financial institutions 2,143 2,175 2,070 2,094 $ 2,469 $ 2,501 $ 3,115 $ 3,139 Gross unrealized gains and losses on securities held to maturity at December 31, 2020 and 2019, were as follows (in thousands): 2020 2019 Unrealized Unrealized Unrealized Unrealized Obligations of states and political subdivisions $ — $ — $ — $ — Time deposits with other financial institutions 32 — 24 — Total $ 32 $ — $ 24 $ —
Contractual Maturities of Securities Held to Maturity	The contractual maturity of securities held to maturity is as follows at December 31, 2020 (in thousands): December 31, 2020 Amortized Fair Within one year $ 856 $ 863 After one, but within five years 1,613 1,638 After five, but within ten years — — After ten years — — Total $ 2,469 $ 2,501
Investment Securities Available for Sale in Unrealized Loss Position	The following table summarizes the investment securities available for sale with unrealized losses at December 31, 2020 and December 31, 2019 by aggregated major security type and length of time in a continuous unrealized position (in thousands): Less than 12 months 12 months or longer Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized 2020 Obligations of U.S. Government and U.S. Government sponsored enterprises $ — $ — $ — $ — $ — $ — Mortgage-backed securities, residential 70,037 200 970 1 71,007 201 Obligations of states and political subdivisions — — — — — — Corporate bonds and notes 2,988 12 — — 2,988 12 SBA loan pools 15,245 156 3,636 36 18,881 192 Total temporarily impaired securities $ 88,270 $ 368 $ 4,606 $ 37 $ 92,876 $ 405 Less than 12 months 12 months or longer Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized 2019 Obligations of U.S. Government and U.S. Government sponsored enterprises $ — $ — $ — $ — $ — $ — Mortgage-backed securities, residential 71,506 791 54,343 $ 475 125,849 1,266 Obligations of states and political subdivisions — — — — — — Corporate bonds and notes — — — — — — SBA loan pools 3,014 9 1,405 37 4,419 46 Total temporarily impaired securities $ 74,520 $ 800 $ 55,748 $ 512 $ 130,268 $ 1,312

LOANS AND ALLOWANCE FOR LOAN _2

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	12 Months Ended
	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Abstract]
Composition of Loan Portfolio by Type	The composition of the loan portfolio, net of deferred loan fees is summarized as follows (in thousands): December 31, 2020 December 31, 2019 Commercial and agricultural: Commercial and industrial $ 368,663 $ 230,018 Agricultural 283 274 Commercial mortgages: Construction 61,945 43,962 Commercial mortgages 654,663 604,832 Residential mortgages 239,401 188,338 Consumer loans: Home equity lines and loans 78,547 91,784 Indirect consumer loans 120,538 134,973 Direct consumer loans 12,423 15,038 Total loans, net of deferred loan fees 1,536,463 1,309,219 Interest receivable on loans 5,035 3,684 Total recorded investment in loans $ 1,541,498 $ 1,312,903
Allowance for Loan Losses by Portfolio Segment	The following tables present the activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018, respectively (in thousands): December 31, 2020 Allowance for loan losses Commercial, and Agricultural Commercial Mortgages Residential Mortgages Consumer Loans Total Beginning balance: $ 10,227 $ 8,869 $ 1,252 $ 3,130 $ 23,478 Charge Offs: (4,068) (2,143) (56) (1,113) (7,380) Recoveries: 89 14 86 398 587 Net (charge offs) recoveries (3,979) (2,129) 30 (715) (6,793) Provision (1,755) 4,756 797 441 4,239 Ending balance $ 4,493 $ 11,496 $ 2,079 $ 2,856 $ 20,924 December 31, 2019 Allowance for loan losses Commercial, and Agricultural Commercial Mortgages Residential Mortgages Consumer Loans Total Beginning balance: $ 5,383 $ 8,184 $ 1,226 $ 4,151 $ 18,944 Charge Offs: (312) (1) (151) (1,511) (1,975) Recoveries: 59 4 45 456 564 Net recoveries (charge offs) (253) 3 (106) (1,055) (1,411) Provision 5,097 682 132 34 5,945 Ending balance $ 10,227 $ 8,869 $ 1,252 $ 3,130 $ 23,478 December 31, 2018 Allowance for loan losses Commercial, and Agricultural Commercial Mortgages Residential Mortgages Consumer Loans Total Beginning balance: $ 6,976 $ 8,514 $ 1,316 $ 4,355 $ 21,161 Charge Offs: (3,644) (213) (226) (1,836) (5,919) Recoveries: 47 3 5 494 549 Net recoveries (charge offs) (3,597) (210) (221) (1,342) (5,370) Provision 2,004 (120) 131 1,138 3,153 Ending balance $ 5,383 $ 8,184 $ 1,226 $ 4,151 $ 18,944
Allowance for Loan Losses and Recorded Investment in Loans Based on Impairment Method	The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2020 and December 31, 2019 (in thousands): December 31, 2020 Allowance for loan losses Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Ending allowance balance attributable to loans: Individually evaluated for impairment $ 1,401 $ 74 $ — $ 52 $ 1,527 Collectively evaluated for impairment 3,092 11,422 2,079 2,804 19,397 Total ending allowance balance $ 4,493 $ 11,496 $ 2,079 $ 2,856 $ 20,924 December 31, 2019 Allowance for loan losses Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Ending allowance balance attributable to loans: Individually evaluated for impairment $ 6,000 $ 2,097 $ — $ — $ 8,097 Collectively evaluated for impairment 4,227 6,772 1,252 3,130 15,381 Total ending allowance balance $ 10,227 $ 8,869 $ 1,252 $ 3,130 $ 23,478 December 31, 2020 Loans: Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Loans individually evaluated for impairment $ 3,400 $ 5,117 $ 1,271 $ 801 $ 10,589 Loans collectively evaluated for impairment 366,852 714,028 238,742 211,287 1,530,909 Total ending loans balance $ 370,252 $ 719,145 $ 240,013 $ 212,088 $ 1,541,498 December 31, 2019 Loans: Commercial Commercial Mortgages Residential Mortgages Consumer Loans Total Loans individually evaluated for impairment $ 6,147 $ 8,844 $ 525 $ 149 $ 15,665 Loans collectively evaluated for impairment 224,775 641,726 188,349 242,388 1,297,238 Total ending loans balance $ 230,922 $ 650,570 $ 188,874 $ 242,537 $ 1,312,903
Summary of Impaired Financing Receivables	The following tables present loans individually evaluated for impairment recognized by class of loans as of December 31, 2020 and December 31, 2019, the average recorded investment and interest income recognized by class of loans as of the years ended December 31, 2020, 2019 and 2018 (in thousands): December 31, 2020 December 31, 2019 Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated Unpaid Principal Balance Recorded Investment Allowance for Loan Losses Allocated With no related allowance recorded: Commercial and agricultural: Commercial and industrial $ 1,960 $ 1,963 $ — $ 133 $ 133 $ — Commercial mortgages: Construction 188 189 — 247 247 — Commercial mortgages 6,814 4,760 — 3,501 3,503 — Residential mortgages 1,283 1,271 — 554 525 — Consumer loans: Home equity lines and loans 645 631 — 171 149 — With an allowance recorded: Commercial and agricultural: Commercial and industrial 5,228 1,437 1,401 6,013 6,014 6,000 Commercial mortgages: Commercial mortgages 258 168 74 5,093 5,094 2,097 Consumer loans: Home equity lines and loans 170 170 52 — — — Total $ 16,546 $ 10,589 $ 1,527 $ 15,712 $ 15,665 $ 8,097 December 31, 2020 December 31, 2019 December 31, 2018 Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) Average Recorded Investment Interest Income Recognized (1) With no related allowance recorded: Commercial and agricultural: Commercial and industrial $ 936 $ 16 $ 248 $ — $ 608 $ 12 Commercial mortgages: Construction 219 8 278 10 337 11 Commercial mortgages 4,103 16 3,605 12 4,193 21 Residential mortgages 952 25 422 44 416 7 Consumer loans: Home equity lines & loans 446 7 137 6 60 3 With an allowance recorded: Commercial and agricultural: Commercial and industrial 4,981 4 3,209 — 3,043 3 Commercial mortgages: Commercial mortgages 2,949 — 6,524 — 2,315 4 Consumer loans: Home equity lines and loans 104 — — — — — Total $ 14,690 $ 76 $ 14,423 $ 72 $ 10,972 $ 61 (1) Cash basis interest income approximates interest income recognized.
Recorded Investment in Past Due and Non-Accrual Status by Class of Loans	The following tables present the recorded investment in non-accrual and loans past due 90 days or more and still accruing by class of loans as of December 31, 2020 and December 31, 2019 (in thousands): Non-accrual Loans Past Due 90 Days or More and Still Accruing 2020 2019 2020 2019 Commercial and agricultural: Commercial and industrial $ 2,167 $ 6,147 $ 2 $ 7 Commercial mortgages: Construction 55 80 — — Commercial mortgages 4,415 8,407 — — Residential mortgages 1,632 2,155 — — Consumer loans: Home equity lines and loans 1,159 641 — — Indirect consumer loans 519 571 — — Direct consumer loans 5 7 — — Total $ 9,952 $ 18,008 $ 2 $ 7 The following tables present the aging of the recorded investment in loans as of December 31, 2020 and December 31, 2019 (in thousands): December 31, 2020 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Loans Not Past Due Total Commercial and agricultural: Commercial and industrial $ 520 $ 14 $ 30 $ 564 $ 369,404 $ 369,968 Agricultural — — — — 284 284 Commercial mortgages: Construction — — — — 62,164 62,164 Commercial mortgages 1,438 3,696 308 5,442 651,539 656,981 Residential mortgages 817 406 461 1,684 238,329 240,013 Consumer loans: Home equity lines and loans 521 41 474 1,036 77,725 78,761 Indirect consumer loans 1,268 198 252 1,718 119,135 120,853 Direct consumer loans 34 2 — 36 12,438 12,474 Total $ 4,598 $ 4,357 $ 1,525 $ 10,480 $ 1,531,018 $ 1,541,498 December 31, 2019 30 - 59 Days Past Due 60 - 89 Days Past Due 90 Days or More Past Due Total Past Due Loans Not Past Due Total Commercial and agricultural: Commercial and industrial $ 1,285 $ 49 $ 4,398 $ 5,732 $ 224,916 $ 230,648 Agricultural — — — — 274 274 Commercial mortgages: Construction — — — — 44,082 44,082 Commercial mortgages 440 277 2,165 2,883 603,605 606,488 Residential mortgages 1,016 803 956 2,775 186,099 188,874 Consumer loans: Home equity lines and loans 353 151 149 653 91,412 92,065 Indirect consumer loans 1,546 377 355 2,278 133,088 135,366 Direct consumer loans 32 11 6 49 15,057 15,106 Total $ 4,672 $ 1,668 $ 8,029 $ 14,370 $ 1,298,533 $ 1,312,903
Loans by Class Modified as Troubled Debt Restructurings	The following table presents loans by class modified as troubled debt restructurings that occurred during the years ended December 31, 2020, 2019 and 2018 (in thousands): December 31, 2020 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings: Commercial and agricultural: Commercial and industrial 4 $ 2,068 $ 2,068 Commercial mortgages: Commercial mortgages 4 1,297 1,297 Residential mortgages 4 997 997 Consumer loans: Home equity lines and loans 3 738 738 Total 15 $ 5,100 $ 5,100 The TDRs described above increased the allowance for loan losses by $0.2 million and resulted in no charge offs during the year ended December 31, 2020. December 31, 2019 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings: Commercial mortgages: Commercial mortgages 1 4,223 4,223 Residential mortgages 1 123 123 Consumer loans: Home equity lines and loans 1 137 137 Total 3 $ 4,483 $ 4,483 The TDRs described above increased the allowance for loan losses by $1.7 million and resulted in no charge offs during the year ended December 31, 2019. December 31, 2018 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Troubled debt restructurings: Commercial and agricultural: Commercial and industrial 2 $ 491 $ 491 Total 2 $ 491 $ 491 The TDRs described above increased the allowance for loan losses by $0.4 million and resulted in no charge offs during the year ended December 31, 2018. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. The following table presents loans by class modified as TDRs for which there was a payment default within twelve months following the modification during the year ended December 31, 2020: December 31, 2020 Number of Loans Recorded Investment Consumer loans: Home equity lines and loans 1 $ 170 Total 1 $ 170
Risk Category of Recorded Investment of Loans by Class of Loans	Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans. Loans listed as not rated are included in groups of homogeneous loans. Based on the analyses performed as of December 31, 2020 and 2019, the risk category of the recorded investment of loans by class of loans is as follows (in thousands): December 31, 2020 Not Rated Pass Special Mention Substandard Doubtful Total Commercial and agricultural: Commercial and industrial $ — $ 360,500 $ 2,999 $ 5,092 $ 1,377 $ 369,968 Agricultural — 284 — — — 284 Commercial mortgages: Construction — 59,885 — 2,279 — 62,164 Commercial mortgages — 616,090 23,631 16,128 1,132 656,981 Residential mortgages 238,381 — 1,632 — 240,013 Consumer loans Home equity lines and loans 77,602 — — 1,159 — 78,761 Indirect consumer loans 120,334 — — 519 — 120,853 Direct consumer loans 12,470 — — 4 — 12,474 Total $ 448,787 $ 1,036,759 $ 26,630 $ 26,813 $ 2,509 $ 1,541,498 December 31, 2019 Not Rated Pass Special Mention Substandard Doubtful Total Commercial and agricultural: Commercial and industrial $ — $ 208,552 $ 5,915 $ 10,361 $ 5,820 $ 230,648 Agricultural — 274 — — — 274 Commercial mortgages: Construction — 40,304 168 3,610 — 44,082 Commercial mortgages — 577,266 12,451 12,356 4,415 606,488 Residential mortgages 186,719 — — 2,155 — 188,874 Consumer loans Home equity lines and loans 91,424 — — 641 — 92,065 Indirect consumer loans 134,795 — — 571 — 135,366 Direct consumer loans 15,099 — — 7 — 15,106 Total $ 428,037 $ 826,396 $ 18,534 $ 29,701 $ 10,235 $ 1,312,903
Recorded Investment in Residential and Consumer Loans Based on Payment Activity	The following table presents the recorded investment in residential and consumer loans based on payment activity as of December 31, 2020 and 2019 (in thousands): December 31, 2020 Consumer Loans Residential Mortgages Home Equity Lines and Loans Indirect Consumer Loans Other Direct Consumer Loans Performing $ 238,381 $ 77,602 $ 120,334 $ 12,470 Non-Performing 1,632 1,159 519 4 Total $ 240,013 $ 78,761 $ 120,853 $ 12,474 December 31, 2019 Consumer Loans Residential Mortgages Home Equity Lines and Loans Indirect Consumer Loans Other Direct Consumer Loans Performing $ 186,719 $ 91,424 $ 134,795 $ 15,099 Non-Performing 2,155 641 571 7 Total $ 188,874 $ 92,065 $ 135,366 $ 15,106

PREMISES AND EQUIPMENT (Tables)

PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	Premises and equipment at December 31, 2020 and 2019 are as follows (in thousands): 2020 2019 Land $ 4,803 $ 4,803 Buildings 41,957 41,408 Projects in progress 65 113 Equipment and furniture 37,183 37,007 Leasehold improvements 5,285 5,757 89,293 89,088 Less accumulated depreciation and amortization 69,174 66,671 Net book value $ 20,119 $ 22,417 The Corporation has included these leases in premises and equipment as follows: 2020 2019 Buildings $ 5,572 $ 5,572 Accumulated depreciation (1,875) (1,541) Net book value $ 3,697 $ 4,031

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Assets and Liabilities, Lessee	Leased branch properties at December 31, 2020 and December 31, 2019 consist of the following (in thousands): December 31, 2020 December 31, 2019 Operating lease right-of-use asset $ 8,001 $ 8,713 Less: accumulated amortization (705) (712) Less: Lease termination (151) — Operating lease right-of-use-assets, net $ 7,145 $ 8,001
Lessee, Operating Lease, Liability, Maturity	The following is a schedule by year of the undiscounted cash flows of the operating lease liabilities, excluding CAM charges, as of December 31, 2020 (in thousands): Year Amount 2021 $ 907 2022 846 2023 866 2024 857 2025 841 2026 and thereafter 4,349 Total minimum lease payments 8,666 Less: amount representing interest (1,402) Present value of net minimum lease payments $ 7,264
Finance Lease, Liability, Maturity	The following is a schedule by year of future minimum lease payments under the capitalized lease, together with the present value of net minimum lease payments as of December 31, 2020 (in thousands): Year Amount 2021 $ 388 2022 391 2023 391 2024 391 2025 409 2026 and thereafter 2,839 Total minimum lease payments 4,809 Less: amount representing interest (960) Present value of net minimum lease payments $ 3,849

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill	The changes in goodwill included in the core banking segment during the years ended December 31, 2020 and 2019 were as follows (in thousands): 2020 2019 Beginning of year $ 21,824 $ 21,824 Acquired goodwill — — End of year $ 21,824 $ 21,824
Schedule of Acquired Intangible Assets	Acquired intangible assets were as follows at December 31, 2020 and 2019 (in thousands): At December 31, 2020 At December 31, 2019 Balance Acquired Accumulated Amortization Balance Acquired Accumulated Amortization Core deposit intangibles $ 5,975 $ 5,962 $ 5,975 $ 5,832 Other customer relationship intangibles 5,633 5,388 5,633 5,034 Total $ 11,608 $ 11,350 $ 11,608 $ 10,866
Schedule of Remaining Estimated Aggregate Amortization Expense	The remaining estimated aggregate amortization expense at December 31, 2020 is listed below (in thousands): Year Estimated Expense 2021 $ 258 Total $ 258

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits [Abstract]
Summary of Deposits	A summary of deposits at December 31, 2020 and 2019 is as follows (in thousands): 2020 2019 Non-interest-bearing demand deposits $ 620,423 $ 468,238 Interest-bearing demand deposits 282,172 200,089 Insured money market accounts 603,583 530,242 Savings deposits 245,865 212,393 Time deposits 285,731 161,176 Total $ 2,037,774 $ 1,572,138
Scheduled Maturities of Time Deposits	Scheduled maturities of time deposits at December 31, 2020, are summarized as follows (in thousands): Year Maturities 2021 $ 193,113 2022 75,890 2023 12,784 2024 — 2025 1,084 2026 2,860 Total $ 285,731

SECURITIES SOLD UNDER AGREEME_2

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of Repurchase Agreements [Abstract]
Summary of Securities Sold under Agreements to Repurchase	A summary of securities sold under agreements to repurchase as of and for the years ended December 31, 2020, 2019 and 2018 is as follows (in thousands): 2020 2019 2018 Balance at December 31 $ — $ — $ — Maximum month-end balance $ — $ — $ 10,000 Average balance during year $ — $ — $ 3,644 Weighted-average interest rate at December 31 — % — % — % Average interest rate paid during year — % — % 3.77 %

REVENUE FROM CONTRACTS WITH C_2

REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables present the Corporation's non-interest income by revenue stream and reportable segment for the years ended December 31, 2020, 2019 and 2018 (in thousands). Items outside the scope of ASC 606 are noted as such. Year ended December 31, 2020 Revenue by Operating Segment: Core Banking WMG Holding Company, CFS, and CRM (b) Total Non-interest income Service charges on deposit accounts Overdraft fees $ 2,304 $ — $ — $ 2,304 Other 830 — — 830 Interchange revenue from debit card transactions 4,068 — — 4,068 WMG fee income — 9,492 — 9,492 CFS fee and commission income — — 657 657 Net gains (losses) on sales of OREO (79) — — (79) Net gains on sales of loans (a) 1,730 — — 1,730 Loan servicing fees (a) 121 — — 121 Change in fair value of equity securities (a) 139 — (50) 89 Income from bank-owned life insurance (a) 161 — 161 Other (a) 1,708 — 43 1,751 Total non-interest income $ 10,982 $ 9,492 $ 650 $ 21,124 (a) Not within scope of ASC 606. (b) The Holding Company, CFS, and CRM column above includes amounts to eliminate transactions between segments. Year ended December 31, 2019 Revenue by Operating Segment: Core Banking WMG Holding Company, CFS, and CRM (b) Total Non-interest income Service charges on deposit accounts Overdraft fees $ 3,653 $ — $ — $ 3,653 Other 807 — — 807 Interchange revenue from debit card transactions 4,104 — — 4,104 WMG fee income — 9,503 — 9,503 CFS fee and commission income — — 673 673 Net gains (losses) on sales of OREO (99) — — (99) Net gains on sales of loans (a) 248 — — 248 Loan servicing fees (a) 103 — — 103 Net gains on sales of securities (a) 19 — — 19 Change in fair value of equity securities (a) 143 — (62) 81 Other (a) 1,378 — (397) 981 Total non-interest income $ 10,356 $ 9,503 $ 214 $ 20,073 (a) Not within scope of ASC 606. (b) The Holding Company, CFS, and CRM column above includes amounts to eliminate transactions between segments. Year ended December 31, 2018 Revenue by Operating Segment: Core Banking WMG Holding Company, CFS, and CRM (b) Total Non-interest income Service charges on deposit accounts Overdraft fees $ 3,934 $ — $ — $ 3,934 Other 793 — — 793 Interchange revenue from debit card transactions 4,040 — — 4,040 WMG fee income — 9,317 — 9,317 CFS fee and commission income — — 510 510 Net gains (losses) on sales of OREO 90 — — 90 Net gains on sales of loans (a) 351 — — 351 Loan servicing fees (a) 92 — — 92 Change in fair value of equity securities (a) 2,024 — (20) 2,004 Other (a) 2,272 — (329) 1,943 Total non-interest income $ 13,596 $ 9,317 $ 161 $ 23,074 (a) Not within scope of ASC 606. (b) The Holding Company, CFS, and CRM column above includes amounts to eliminate transactions between segments.

DERIVATIVES (Tables)

DERIVATIVES (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table presents information regarding our derivative financial instruments, at December 31: 2020 Number of Instruments Notional Amount Weighted Average Maturity Weighted Average Interest Rate Received Weighted Average Contract Pay Rate Fair Value Other Assets/ (Other Liabilities) Derivatives not designated as hedging instruments: Interest rate swap agreements on loans with commercial loan customers 26 $ 179,085 7.7 3.95 % 2.20 % $ (15,024) Interest rate swap agreements with third-party counter-parties 26 179,085 7.7 2.20 % 3.95 % 14,702 Risk participation agreements 4 18,840 2.8 (35) Total 56 $ 377,010 $ (357) 2019 Number of Instruments Notional Amount Weighted Average Maturity Weighted Average Interest Rate Received Weighted Average Contract Pay Rate Fair Value Other Assets/ (Other Liabilities) Derivatives not designated as hedging instruments: Interest rate swap agreements on loans with commercial loan customers 15 $ 113,204 7.9 4.44 % 4.03 % $ (6,800) Interest rate swap agreements with third-party counter-parties 15 113,204 7.9 4.03 % 4.44 % 6,466 Risk participation agreements 3 11,819 5.6 (31) 33 $ 238,227 $ (365) 2018 Number of Instruments Notional Amount Weighted Average Maturity Weighted Average Interest Rate Received Weighted Average Contract Pay Rate Fair Value Other Assets/ (Other Liabilities) Derivatives not designated as hedging instruments: Interest rate swap agreements on loans with commercial loan customers 11 $ 76,395 7.1 4.69 % 4.61 % $ (3,255) Interest rate swap agreements with third-party counter-parties 11 76,395 7.1 4.61 % 4.69 % 3,142 Risk participation agreements 6 20,142 15.0 (27) 28 $ 172,932 $ (140)
Schedule of Derivatives Not Designated as Hedging Instruments, Statements of Income	Amounts included in the Consolidated Statements of Income related to derivatives not designated as hedging were as follows: Years Ended December 31, 2020 2019 2018 Derivatives not designated as hedging instruments: Interest rate swap agreements with commercial loan customers: Unrealized (loss) recognized in non-interest income $ (8,224) $ (3,544) $ (2,281) Interest rate swap agreements with third-party counter-parties: Unrealized gain recognized in non-interest income 8,236 3,324 2,168 Risk participation agreements: Unrealized gain (loss) recognized in non-interest income (4) (4) 48 Unrealized gain (loss) recognized in non-interest income $ 8 $ (224) $ (65)

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Components of Income Tax Expense Attributable to Income from Operations	For the years ended December 31, 2020, 2019 and 2018, income tax expense attributable to income from operations consisted of the following (in thousands): 2020 2019 2018 Current expense: Federal $ 4,413 $ 4,603 $ 1,732 State 280 395 124 Total current 4,693 4,998 1,856 Deferred expense/(benefit): Federal (136) (1,126) 2,253 State 50 (438) 345 Remeasurement of deferred tax assets — — (445) Total deferred (86) (1,564) 2,153 Income tax expense $ 4,607 $ 3,434 $ 4,009
Reconciliation of Income Tax Expense	Income tax expense differed from the amounts computed by applying the U.S. Federal statutory income tax rate to income before income tax expense as follows (in thousands): 2020 2019 2018 Statutory federal tax rate 21 % 21 % 21 % Tax computed at statutory rate $ 5,013 $ 3,999 $ 4,963 Increase (reduction) resulting from: Tax-exempt income (395) (424) (430) 831(b) premium adjustment (296) (189) (167) Dividend exclusion (5) (7) (7) State taxes, net of Federal impact 118 (86) 262 Nondeductible interest expense 5 9 7 Remeasurement of deferred tax assets — — (445) Other items, net 167 132 (174) Income tax expense $ 4,607 $ 3,434 $ 4,009 Effective tax rate 19.3 % 18.0 % 17.0 %
Deferred Tax Assets and Deferred Tax Liabilities	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019, are presented below (in thousands): 2020 2019 Deferred tax assets: Allowance for loan losses $ 5,393 $ 6,046 Accrual for employee benefit plans 47 92 Depreciation 681 379 Deferred compensation and directors' fees 1,045 765 Operating lease liabilities 1,831 2,050 Purchase accounting adjustment – loans 1 1 Purchase accounting adjustment – fixed assets 149 149 Gain on deemed sale of securities 54 71 Accounting for defined benefit pension and other benefit plans 2,302 2,448 Nonaccrued interest 687 695 Accrued expense 158 179 Other items, net 48 38 Total gross deferred tax assets 12,396 12,913 Deferred tax liabilities: Deferred loan fees and costs 274 592 Prepaid pension 3,344 3,189 Net unrealized gains on securities available for sale 3,124 468 Discount accretion 50 24 Core deposit intangible 1,353 1,213 REIT dividend 616 922 Operating lease right-of-use assets 1,831 2,050 Other 168 103 Total gross deferred tax liabilities 10,760 8,561 Net deferred tax asset $ 1,636 $ 4,352

PENSION PLAN AND OTHER BENEFI_2

PENSION PLAN AND OTHER BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Change in Benefit Obligation	The following table presents (1) changes in the plan's projected benefit obligation and plan assets, and (2) the plan's funded status at December 31, 2020 and 2019 (in thousands): Change in projected benefit obligation: 2020 2019 Benefit obligation at beginning of year $ 39,886 $ 36,022 Service cost — — Interest cost 1,300 1,522 Actuarial (gain) loss 3,735 4,474 Curtailments — — Settlements — — Benefits paid (2,140) (2,132) Benefit obligation at end of year $ 42,781 $ 39,886 The following table presents (1) changes in the plan's accumulated postretirement benefit obligation and (2) the plan's funded status at December 31, 2020 and 2019 (in thousands): Changes in accumulated postretirement benefit obligation: 2020 2019 Accumulated postretirement benefit obligation - beginning of year $ 332 $ 363 Service cost — — Interest cost 9 16 Participant contributions 35 49 Amendments — — Actuarial (gain) loss (57) 31 Benefits paid (70) (127) Accumulated postretirement benefit obligation at end of year $ 249 $ 332 The following table presents Executive Supplemental Pension plan status at December 31, 2020 and 2019 (in thousands): Change in projected benefit obligation: 2020 2019 Benefit obligation at beginning of year $ 1,232 $ 1,179 Service cost — — Interest cost 39 49 Actuarial (gain) loss 89 113 Benefits paid (109) (109) Projected benefit obligation at end of year $ 1,251 $ 1,232
Change in Plan Assets	Change in plan assets: 2020 2019 Fair value of plan assets at beginning of year $ 45,557 $ 41,476 Actual return on plan assets 6,717 6,213 Employer contributions — — Settlements — — Benefits paid (2,140) (2,132) Fair value of plan assets at end of year $ 50,134 $ 45,557 Funded status $ 7,353 $ 5,671 Change in plan assets: 2020 2019 Fair value of plan assets at beginning of year $ — $ — Employer contribution 35 78 Plan participants’ contributions 35 49 Benefits paid (70) (127) Fair value of plan assets at end of year $ — $ — Unfunded status $ (249) $ (332) Changes in plan assets: 2020 2019 Fair value of plan assets at beginning of year $ — $ — Employer contributions 109 109 Benefits paid (109) (109) Fair value of plan assets at end of year $ — $ — Unfunded status $ (1,251) $ (1,232)
Amount Recognized in Accumulated Other Comprehensive Income	Amount recognized in accumulated other comprehensive income (loss) at December 31, 2020 and 2019 consist of the following (in thousands): 2020 2019 Net actuarial loss $ 8,602 $ 9,352 Prior service cost — — Total before tax effects $ 8,602 $ 9,352 Amount recognized in accumulated other comprehensive income (loss) at December 31, 2020 and 2019 consist of the following (in thousands): 2020 2019 Net actuarial loss $ 286 $ 417 Prior service credit (220) (440) Total before tax effects $ 66 $ (23) Amounts recognized in accumulated other comprehensive income (loss) at December 31, 2020 and 2019 consist of the following (in thousands): 2020 2019 Net actuarial loss $ 359 $ 283 Prior service cost — — Total before tax effects $ 359 $ 283
Assumptions Used in Determining Benefit Obligation	The principal actuarial assumptions used in determining the projected benefit obligation as of December 31, 2020, 2019 and 2018 were as follows: 2020 2019 2018 Discount rate 2.61 % 3.33 % 4.35 % Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A Accumulated benefit obligation at December 31, 2020 and 2019 was $1.3 million and $1.2 million, respectively. Weighted-average assumption for disclosure as of December 31: 2020 2019 2018 Discount rate 2.61 % 3.33 % 4.35 % Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A
Components of Net Periodic Benefit Cost	Components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss) in 2020, 2019 and 2018 consist of the following (in thousands): Net periodic benefit cost 2020 2019 2018 Service cost, benefits earned during the year $ — $ — $ — Interest cost on projected benefit obligation 1,300 1,522 1,551 Expected return on plan assets (2,444) (2,221) (3,309) Amortization of net loss 213 204 188 Amortization of prior service cost — — — Recognized (gain) loss due to settlements — — 828 Net periodic cost (benefit) $ (931) $ (495) $ (742) The components of net periodic postretirement benefit cost for the years ended December 31, 2020, 2019 and 2018 are as follows (in thousands): Net periodic cost (benefit) 2020 2019 2018 Service cost $ — $ — $ — Interest cost 9 16 16 Expected return on plan assets — — — Amortization of prior service benefit (220) (220) (220) Recognized actuarial loss 74 105 123 Recognized prior service benefit due to curtailments — — — Net periodic postretirement cost (benefit) $ (137) $ (99) $ (81) The components of net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018 are as follows (in thousands): Net periodic benefit cost 2020 2019 2018 Service cost $ — $ — $ — Interest cost 39 49 46 Recognized actuarial loss 13 4 7 Net periodic postretirement benefit cost $ 52 $ 53 $ 53
Schedule of Other Amounts Recognized in Other Comprehensive Income	Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): 2020 2019 2018 Net actuarial (gain) loss $ (538) $ 481 $ 736 Recognized loss (213) (204) (1,016) Amortization of prior service cost — — — Total recognized in other comprehensive income (loss) (before tax effect) $ (751) $ 277 $ (280) Total recognized in net (benefit) cost and other comprehensive income (loss) (before tax effect) $ (1,682) $ (218) $ (1,022) Other changes in plan assets and benefit obligations 2020 2019 2018 Net actuarial (gain) loss $ (57) $ 31 $ 22 Recognized actuarial loss (74) (105) (123) Prior service credit — — — Amortization of prior service benefit 220 220 220 Total recognized in other comprehensive income (loss)(before tax effect) $ 89 $ 146 $ 119 Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect) $ (48) $ 47 $ 38 Other changes in plan assets and benefit obligation recognized in other comprehensive income (loss): 2020 2019 2018 Net actuarial (gain) loss $ 89 $ 113 $ (47) Recognized actuarial loss (13) (4) (7) Total recognized in other comprehensive income (loss) (before tax effect) $ 76 $ 109 $ (54) Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect) $ 128 $ 162 $ (1)
Assumptions Used in Determining Net Periodic Benefit Cost	The principal actuarial assumptions used in determining the net periodic benefit cost for the years ended December 31, 2020, 2019 and 2018 were as follows: 2020 2019 2018 Discount rate 3.33 % 4.35 % 3.74 % Expected return on assets 5.50 % 5.50 % 7.25 % Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A Weighted-average assumptions for net periodic cost as of December 31: 2020 2019 2018 Discount rate 3.33 % 4.35 % 3.74 % Expected asset return N/A N/A N/A Assumed rate of future compensation increase N/A N/A N/A Weighted-average interest crediting rate N/A N/A N/A
Target Assets Allocations	The expected return on plan assets was determined based on a CAPM using historical and expected future returns of the various asset classes, reflecting the target allocations described below. Asset Class Target Allocation 2020 Percentage of Plan Assets at December 31, Expected Long-Term Rate of Return 2020 2019 Large cap domestic equities 20% - 50% 43 % 38 % 8.7 % Mid-cap domestic equities 0% - 15% 2 % 2 % 9.4 % Small-cap domestic equities 0% - 10% 3 % 2 % 8.8 % International equities 0% - 20% 3 % 8 % 5.1 % Intermediate fixed income 30% - 70% 45 % 45 % 4.7 % Alternative assets 0% - 10% — % — % — % Cash 0% - 20% 4 % 5 % 1.3 % Total 100 % 100 %
Fair Value of Plan Assets	The fair value of the plan assets at December 31, 2020 and 2019, by asset class are as follows (in thousands): Fair Value Measurement atDecember 31, 2020 Using Plan Assets Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Cash $ 2,047 $ 2,047 $ — $ — Equity securities: U.S. companies 21,716 21,716 — — Mutual funds 23,778 23,778 — — Debt securities: U.S. Treasuries/Government bonds 2,318 — 2,318 — U.S. Corporate bonds 275 — 275 — Total plan assets $ 50,134 $ 47,541 $ 2,593 $ — Fair Value Measurement atDecember 31, 2019 Using Plan Assets Carrying Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Cash $ 2,210 $ 2,210 $ — $ — Equity securities: U.S. companies 17,939 17,939 — — Mutual funds 21,328 21,328 — — Debt securities: U.S. Treasuries/Government bonds 3,054 — 3,054 — U.S. Corporate bonds 1,026 — 1,026 — Total plan assets $ 45,557 $ 41,477 $ 4,080 $ —
Estimated Benefit Payments	The following table presents the estimated benefit payments for each of the next five years and the aggregate amount expected to be paid in years six through ten for the pension plan (in thousands): Calendar Year Future Expected Benefit Payments 2021 $ 2,273 2022 $ 2,279 2023 $ 2,276 2024 $ 2,283 2025 $ 2,284 2026-2030 $ 11,379 The following table presents the estimated benefit payments for each of the next five years and the aggregate amount expected to be paid in years six through ten (in thousands): Calendar Year Future Estimated Benefit Payments 2021 $ 48 2022 $ 35 2023 $ 36 2024 $ 20 2025 $ 19 2026-2030 $ 74 The following table presents the estimated benefit payments for each of the next five years and the aggregate amount expected to be paid in years six through ten for the Supplemental Pension Plan (in thousands): Calendar Year Future Estimated Benefit Payments 2021 $ 108 2022 $ 106 2023 $ 104 2024 $ 101 2025 $ 97 2026-2030 $ 417
Weighted-Average Assumption for Disclosure of Health Care Cost Trend	Weighted-average assumption for disclosure as of December 31: 2020 2019 2018 Discount rate 2.61% 3.33% 4.35% Assumed rate of future compensation increase N/A N/A N/A Health care cost trend: Initial (Pre-65/Post 65) 6.95% / 5.45% 6.95% / 5.45% 6.95% / 5.45% Health care cost trend: Ultimate (Pre-65/Post 65) 4.75% / 4.75% 4.75% / 4.75% 4.75% / 4.75% Year ultimate cost trend reached 2026 2025 2024
Weighted-Average Assumption for Net Periodic Cost	Weighted-average assumptions for net periodic cost as of December 31: 2020 2019 2018 Discount rate 3.33% 4.35% 3.74% Expected return on plan assets N/A N/A N/A Assumed rate of future compensation increase N/A N/A N/A Health care cost trend: Initial 6.95% / 5.45% 6.95% / 5.45% 6.50% Health care cost tread: Ultimate 4.75% / 4.75% 4.75% / 4.75% 5.00% Year ultimate reached 2025 2024 2021

STOCK COMPENSATION (Tables)

STOCK COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Summary of Restricted Stock Activity	A summary of restricted stock activity as of December 31, 2020, and changes during the year ended is presented below: Shares Weighted–Average Grant Date Fair Value Nonvested at December 31, 2019 33,575 $ 43.24 Granted 14,805 35.21 Vested (16,438) 41.65 Forfeited or Cancelled (112) 44.72 Nonvested at December 31, 2020 31,830 $ 40.32

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Summary of Related Party Loans	These loans are summarized as follows for the years ended December 31, 2020 and 2019 (in thousands): 2020 2019 Balance at beginning of year $ 59,973 $ 62,741 New loans or additional advances 7,461 1,895 Effect of changes in composition of related parties — 4,456 Repayments (11,382) (9,119) Balance at end of year $ 56,052 $ 59,973

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Contractual Amounts of Financial Instruments with Off-Balance Sheet Risk	The contractual amounts of financial instruments with off-balance sheet risk at year-end were as follows (in thousands): 2020 2019 Fixed Rate Variable Rate Fixed Rate Variable Rate Commitments to make loans $ 28,459 $ 39,056 $ 15,560 $ 25,233 Unused lines of credit $ 1,300 $ 268,075 $ 1,062 $ 229,137 Standby letters of credit $ — $ 16,094 $ — $ 16,272

PARENT COMPANY FINANCIAL INFO_2

PARENT COMPANY FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Parent Company Statement of Financial Position	Condensed parent company only financial statement information of Chemung Financial Corporation is as follows (investment in subsidiaries is recorded using the equity method of accounting) (in thousands): BALANCE SHEETS - DECEMBER 31 2020 2019 Assets: Cash on deposit with subsidiary bank $ 2,243 $ 3,938 Investment in subsidiary - Chemung Canal Trust Company 192,364 175,470 Investment in subsidiary - CFS Group, Inc. 876 868 Investment in subsidiary - Chemung Risk Management, Inc. 2,563 1,954 Dividends receivable from subsidiary bank 1,214 — Securities available for sale, at estimated fair value 377 492 Other assets 1,420 1,266 Total assets $ 201,057 $ 183,988 Liabilities and shareholders' equity: Dividends payable $ 1,214 $ 1,263 Other liabilities 144 98 Total liabilities 1,358 1,361 Shareholders' equity: Total shareholders' equity 199,699 182,627 Total liabilities and shareholders' equity $ 201,057 $ 183,988
Parent Company Statement of Income	STATEMENTS OF INCOME - YEARS ENDED DECEMBER 31 2020 2019 2018 Dividends from subsidiary bank and non-bank $ 10,806 $ 4,516 $ 3,187 Interest and dividend income 5 9 10 Non-interest income (50) (62) (20) Non-interest expenses 503 439 477 Income before impact of subsidiaries' undistributed earnings 10,258 4,024 2,700 Equity in undistributed earnings of Chemung Canal Trust Company 8,204 11,220 16,670 Equity in undistributed earnings of CFS Group, Inc. 8 (4) (32) Equity in undistributed earnings of Chemung Risk Management, Inc. 610 205 124 Income before income tax 19,080 15,445 19,462 Income tax benefit (182) (164) (164) Net income $ 19,262 $ 15,609 $ 19,626
Parent Company Statement of Cash Flows	STATEMENTS OF CASH FLOWS - YEARS ENDED DECEMBER 31 2020 2019 2018 Cash flows from operating activities: Net Income $ 19,262 $ 15,609 $ 19,626 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed earnings of Chemung Canal Trust Company (8,204) (11,220) (16,670) Equity in undistributed earnings of CFS Group, Inc. (8) 4 32 Equity in undistributed earnings of Chemung Risk Management, Inc. (610) (205) (124) Change in dividend receivable (1,214) — 1,233 Change in other assets (154) (196) (32) Change in other liabilities 6 (48) 773 Expense related to employee stock compensation 101 100 89 Expense related to restricted stock units for directors' deferred compensation plan 29 42 67 Expense to employee restricted stock awards 672 503 405 Net cash provided by operating activities 9,880 4,589 5,399 Cash flow from financing activities: Cash dividends paid (5,006) (5,029) (4,969) Purchase of treasury stock (7,589) (185) (112) Sale of treasury stock 1,018 585 643 Net cash used in financing activities (11,577) (4,629) (4,438) Increase (decrease) in cash and cash equivalents (1,697) (40) 961 Cash and cash equivalents at beginning of year 3,938 3,978 3,017 Cash and cash equivalents at end of year $ 2,241 $ 3,938 $ 3,978

FAIR VALUES (Tables)

FAIR VALUES (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands): Fair Value Measurement at December 31, 2020 Using Financial Assets: Fair Value Quoted Prices Significant Significant Unobservable Inputs Mortgage-backed securities, residential $ 467,866 $ — $ 467,866 $ — Obligations of states and political subdivisions 43,405 — 43,405 — Corporate bonds and notes 9,035 — 9,035 — SBA loan pools 34,305 — 34,305 — Total available for sale securities $ 554,611 $ — $ 554,611 $ — Equity Investments $ 1,880 $ 1,880 $ — $ — Derivative assets 14,702 — 14,702 — Financial Liabilities: Derivative liabilities $ 15,059 $ — $ 14,702 $ 357 Fair Value Measurement at December 31, 2019 Using Financial Assets: Fair Value Quoted Prices Significant Other Observable Inputs Significant Unobservable Inputs Mortgage-backed securities, residential $ 225,234 $ — $ 225,234 $ — Obligations of states and political subdivisions 42,845 — 42,845 — Corporate bonds and notes 250 — 250 — SBA loan pools 15,761 — 15,761 — Total available for sale securities $ 284,090 $ — $ 284,090 $ — Equity investments $ 1,442 $ 1,442 $ — $ — Derivative assets 6,466 — 6,466 — Financial Liabilities: Derivative liabilities $ 6,831 $ — $ 6,466 $ 365
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31: Assets (Liabilities) Derivative Liabilities (in thousands) 2020 2019 Balance of recurring Level 3 assets at January 1 $ (365) $ (140) Derivative instruments entered into (52) (43) Total gains or losses for the period: Included in earnings - other non-interest income 60 (182) Balance of recurring Level 3 assets at December 31 $ (357) $ (365)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The table below presents a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the year ended December 31: Assets (Liabilities) Derivative Liabilities (in thousands) 2020 2019 Balance of recurring Level 3 assets at January 1 $ (365) $ (140) Derivative instruments entered into (52) (43) Total gains or losses for the period: Included in earnings - other non-interest income 60 (182) Balance of recurring Level 3 assets at December 31 $ (357) $ (365)
Information Related To Level 3 Non-Recurring Fair Value Measurement	The following table presents information related to Level 3 recurring fair value measurement at December 31, 2020 and December 31, 2019 (in thousands): Description Fair Value at December 31, Valuation Technique Unobservable Inputs Range Derivative liabilities $ 357 Historical trend Credit default rate 0.93% - 27.78% [2.27%] Description Fair Value at December 31, Valuation Technique Unobservable Inputs Range Derivative liabilities $ 365 Historical trend Credit default rate 7.30% - 7.30% [7.30%] Assets and liabilities measured at fair value on a non-recurring basis are summarized below (in thousands): Fair Value Measurement at December 31, 2020 Using Financial Assets: Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) Impaired Loans: Commercial mortgages: Commercial mortgages $ — $ — $ — $ — $ — Total impaired loans $ — $ — $ — $ — $ — Other real estate owned: Commercial mortgages: Commercial mortgages $ 111 $ — $ — $ 111 $ — Residential mortgages 126 — — 126 — Total other real estate owned, net $ 237 $ — $ — $ 237 $ — Fair Value Measurement at December 31, 2019 Using Financial Assets: Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Gains (Losses) Impaired Loans: Commercial mortgages: Commercial mortgages $ 1,554 $ — $ — $ 1,554 $ (1,597) Total impaired loans $ 1,554 $ — $ — $ 1,554 $ (1,597) Other real estate owned: Commercial mortgages: Commercial mortgages $ 111 $ — $ — $ 111 $ — Residential mortgages 284 — — 284 (12) Consumer loans: Home equity lines and loans 122 — — 122 — Total other real estate owned, net $ 517 $ — $ — $ 517 $ (12) The following table presents information related to Level 3 non-recurring fair value measurement at December 31, 2020 and 2019 (in thousands): Asset Fair Value at December 31, 2020 Valuation Technique Unobservable Inputs Range OREO: Commercial mortgages: Commercial mortgages $ 111 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] Residential mortgages 126 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] $ 237 Asset Fair Value at December 31, 2019 Valuation Technique Unobservable Inputs Range Impaired loans: Commercial mortgages: Commercial mortgages $ 1,554 Sales comparison Discount to appraised value 10.00% - 10.00% [10.00%] $ 1,554 OREO: Commercial mortgages: Commercial mortgages $ 111 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] Residential mortgages 284 Sales comparison Discount to appraised value 20.80% - 35.29% [24.09%] Consumer loans: Home equity lines and loans 122 Sales comparison Discount to appraised value 20.80% - 20.80% [20.80%] $ 517
Carrying Value and Estimated Fair Value of Other Financial Instruments	The carrying amounts and estimated fair values of other financial instruments, at December 31, 2020 and December 31, 2019, are as follows (in thousands): Fair Value Measurements at December 31, 2020 Using Financial assets: Carrying Amount Quoted Prices Significant Other Observable Inputs Significant Unobservable Inputs Estimated Cash and due from financial institutions $ 29,467 $ 29,467 $ — $ — $ 29,467 Interest-bearing deposits in other financial institutions 79,071 79,071 — — 79,071 Equity investments 2,542 2,542 — — 2,542 Securities available for sale 554,611 — 554,611 — 554,611 Securities held to maturity 2,469 — 2,175 326 2,501 FHLBNY and FRBNY stock 3,150 — — — N/A Loans, net and loans held for sale 1,515,709 — — 1,514,318 1,514,318 Accrued interest receivable 6,271 — 1,356 4,915 6,271 Derivative assets 14,702 — 14,702 — 14,702 Financial liabilities: Deposits: Demand, savings, and insured money market accounts $ 1,752,043 $ 1,752,043 $ — $ — $ 1,752,043 Time deposits 285,731 — 288,398 — 288,398 Accrued interest payable 262 11 251 — 262 Derivative liabilities 15,059 — 14,702 357 15,059 (1) Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair Value Measurements at December 31, 2019 Using Financial Assets: Carrying Amount Quoted Prices Significant Other Observable Inputs Significant Unobservable Inputs Estimated Cash and due from financial institutions $ 25,203 $ 25,203 $ — $ — $ 25,203 Interest-bearing deposits in other financial institutions 96,701 96,701 — — 96,701 Equity investments 2,174 2,174 — — 2,174 Securities available for sale 284,090 — 284,090 — 284,090 Securities held to maturity 3,115 — 2,094 1,045 3,139 FHLBNY and FRBNY stock 3,099 — — — N/A Loans, net and loans held for sale 1,286,926 — — 1,285,215 1,285,215 Accrued interest receivable 4,633 63 885 3,685 4,633 Derivative assets 6,466 — 6,466 — 6,466 Financial liabilities: Deposits: Demand, savings, and insured money market accounts $ 1,410,962 $ 1,410,962 $ — $ — $ 1,410,962 Time deposits 161,176 — 163,761 — 163,761 Accrued interest payable 299 27 272 — 299 Derivative liabilities 6,831 — 6,466 365 6,831 (1) Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

REGULATORY CAPITAL REQUIREMEN_2

REGULATORY CAPITAL REQUIREMENTS (Tables)	12 Months Ended
	Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Actual Capital Amounts and Ratios of Corporation and Bank	The actual capital amounts and ratios of the Corporation and the Bank are presented in the following tables (in thousands): Actual Minimal Capital Adequacy Minimal Capital Adequacy with Capital Buffer To Be Well As of December 31, 2020 Amount Ratio Amount Ratio Amount Ratio Amount Ratio Total Capital (to Risk Weighted Assets): Consolidated $ 192,960 13.62 % N/A N/A N/A N/A N/A N/A Bank $ 185,606 13.12 % $ 113,182 8.00 % $ 148,551 10.50 % $ 141,478 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 175,216 12.37 % N/A N/A N/A N/A N/A N/A Bank $ 167,881 11.87 % $ 84,887 6.00 % $ 120,256 8.50 % $ 113,182 8.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 175,216 12.37 % N/A N/A N/A N/A N/A N/A Bank $ 167,881 11.87 % $ 63,665 4.50 % $ 99,034 7.00 % $ 91,960 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 175,216 7.90 % N/A N/A N/A N/A N/A N/A Bank $ 167,881 7.59 % $ 88,474 4.00 % N/A N/A $ 110,592 5.00 % Actual Minimum Capital Adequacy Minimal Capital Adequacy with Capital Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions As of December 31, 2019 Amount Ratio Amount Ratio Amount Ratio Amount Ratio Total Capital (to Risk Weighted Assets): Consolidated $ 182,239 13.98 % N/A N/A N/A N/A N/A N/A Bank $ 175,062 13.45 % $ 104,136 8.00 % $ 136,679 10.50 % $ 130,170 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 165,859 12.73 % N/A N/A N/A N/A N/A N/A Bank $ 158,702 12.19 % $ 78,102 6.00 % $ 110,645 8.50 % $ 104,136 8.00 % Common Equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 165,859 12.73 % N/A N/A N/A N/A N/A N/A Bank $ 158,702 12.19 % $ 58,577 4.50 % $ 91,119 7.00 % $ 84,611 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 165,859 9.35 % N/A N/A N/A N/A N/A N/A Bank $ 158,702 8.98 % $ 70,719 4.00 % N/A N/A $ 88,399 5.00 %

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Summary of Changes in Accumulated Other Comprehensive Income or Loss by Component, Net of Tax	The following is a summary of the changes in accumulated other comprehensive income or loss by component, net of tax, for the periods indicated (in thousands): Unrealized Gains and Losses on Securities Available for Sale Defined Benefit and Other Benefit Plans Total Balance at January 1, 2020 $ 1,368 $ (7,167) $ (5,799) Other comprehensive income before reclassification 7,759 377 8,136 Amounts reclassified from accumulated other comprehensive income (loss) — 64 64 Net current period other comprehensive income (loss) 7,759 441 8,200 Balance at December 31, 2020 $ 9,127 $ (6,726) $ 2,401 Unrealized Gains and Losses on Securities Available for Sale Defined Benefit and Other Benefit Plans Total Balance at January 1, 2019 $ (4,646) $ (6,765) $ (11,411) Other comprehensive income (loss) before reclassification 6,028 (467) 5,561 Amounts reclassified from accumulated other comprehensive income (loss) (14) 65 51 Net current period other comprehensive income (loss) 6,014 (402) 5,612 Balance at December 31, 2019 $ 1,368 $ (7,167) $ (5,799) Unrealized Gains and Losses on Securities Available for Sale Defined Benefit and Other Benefit Plans Total Balance at Balance at December 31, 2017 $ (3,415) $ (6,925) $ (10,340) Cumulative effect of accounting change (202) — (202) Balance at January 1, 2018 (3,617) (6,925) (10,542) Other comprehensive income (loss) before reclassification (1,029) (530) (1,559) Amounts reclassified from accumulated other comprehensive income (loss) — 690 690 Net current period other comprehensive loss (1,029) 160 (869) Balance at December 31, 2018 $ (4,646) $ (6,765) $ (11,411)
Reclassification Out of Accumulated Other Comprehensive Income	The following is the reclassification out of accumulated other comprehensive income (loss) for the periods indicated (in thousands): Details about Accumulated Other Comprehensive Income (Loss) Components Year Ended December 31, Affected Line Item 2020 2019 2018 Unrealized gains and losses on securities available for sale: Realized gains on securities available for sale $ — $ (19) $ — Net gains on securities transactions Tax effect — 5 — Income tax expense Net of tax — (14) — Amortization of defined pension plan and other benefit plan items: Prior service costs (a) (220) (220) (220) Other components of net periodic pension and postretirement benefits Actuarial losses (a) 300 312 1,146 Other components of net periodic pension and postretirement benefits Tax effect (15) (27) (236) Income tax expense Net of tax 65 65 690 Total reclassification for the period, net of tax $ 65 $ 51 $ 690 (a) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension and other benefit plan costs (see Note 14 for additional information).

SEGMENT REPORTING (Tables)

SEGMENT REPORTING (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Summarized Financial Information Concerning Reportable Segments And Reconciliation To Consolidated Results	The Holding Company, CFS, and CRM column below includes amounts to eliminate transactions between segments as well as income and expenses related to insurance products, mutual funds, brokerage services, and captive insurance (in thousands). Year ended December 31, 2020 Core Banking WMG Holding Company, CFS and CRM Consolidated Totals Interest and dividend income $ 66,849 $ — $ 58 $ 66,907 Interest expense 3,988 — — 3,988 Net interest income 62,861 — 58 62,919 Provision for loan losses 4,239 — — 4,239 Net interest income after provision for loan losses 58,622 — 58 58,680 Non-interest income 10,982 9,492 650 21,124 Non-interest expenses 48,479 6,283 1,173 55,935 Income (loss) before income tax expense 21,125 3,209 (465) 23,869 Income tax expense (benefit) 3,952 824 (169) 4,607 Segment net income (loss) $ 17,173 $ 2,385 $ (296) $ 19,262 Segment assets $ 2,271,923 $ 3,231 $ 4,297 $ 2,279,451 Year ended December 31, 2019 Core Banking WMG Holding Company, CFS and CRM Consolidated Totals Interest and dividend income $ 66,868 $ — $ 64 $ 66,932 Interest expense 6,321 — — 6,321 Net interest income 60,547 — 64 60,611 Provision for loan losses 5,945 — — 5,945 Net interest income after provision for loan losses 54,602 — 64 54,666 Non-interest income 10,356 9,503 214 20,073 Non-interest expenses 48,213 6,326 1,157 55,696 Income (loss) before income tax expense 16,745 3,177 (879) 19,043 Income tax expense (benefit) 2,778 810 (154) 3,434 Segment net income (loss) $ 13,967 $ 2,367 $ (725) $ 15,609 Segment assets $ 1,780,401 $ 3,345 $ 4,082 $ 1,787,827 Year ended December 31, 2018 Core Banking WMG Holding Company and CFS Consolidated Totals Interest and dividend income $ 64,511 $ — $ 42 $ 64,553 Interest expense 4,073 — — 4,073 Net interest income 60,438 — 42 60,480 Provision for loan losses 3,153 — — 3,153 Net interest income after provision for loan losses 57,285 — 42 57,327 Non-interest income 13,597 9,317 160 23,074 Non-interest expenses 49,650 5,997 1,119 56,766 Income (loss) before income tax expense 21,232 3,320 (917) 23,635 Income tax expense (benefit) 3,329 847 (167) 4,009 Segment net income (loss) $ 17,903 $ 2,473 $ (750) $ 19,626 Segment assets $ 1,747,208 $ 3,606 $ 4,529 $ 1,755,343

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements		$ 199,699	$ 182,627	$ 165,029	$ 149,813
Period of delinquency after which a loan is placed on non-accrual status (days)		90 days
Number of consecutive months for which loans remain current before non-accrual loans are returned to accrual status		6 months
Rolling historical period of net losses used in evaluating general component of valuation allowance for loans not impaired but classified as substandard and special mention (years)		5 years
Number of most recent years of actual loss history used in determining historical loss experience for all other unclassified loans (years)		2 years
Assets under management		$ 2,091,000	1,915,000
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives (years)		15 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives (years)		50 years
Equipment and Furniture | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives (years)		3 years
Equipment and Furniture | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives (years)		10 years
Chemung Financial Corporation
Property, Plant and Equipment [Line Items]
Assets under management		$ 305,500	289,700
Retained Earnings
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements		168,006	153,701	143,129	128,453
Accumulated Other Comprehensive Income (Loss)
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements		$ 2,401	$ (5,799)	$ (11,411)	(10,340)
Accumulated Other Comprehensive Income (Loss) | Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements					(202)
Accounting Standards Update 2016-01 | Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements	[1]				(162)
Accounting Standards Update 2016-01 | Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements	[1]				40
Accounting Standards Update 2016-01 | Accumulated Other Comprehensive Income (Loss) | Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Adjustments due to new accounting pronouncements	[1]				$ (202)
[1]	Due to implementation of ASC 2016-01. See "Adoption of New Accounting Standards" discussion in Note 1.

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Postretirement Benefits (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2017
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Normal retirement benefit as percentage of final average compensation (in hundredths)	1.20%
Number of consecutive years considered in final average compensation	5 years
Number of prior years considered in final average compensation	10 years
Maximum service period (years)	25 years
Normal retirement additional benefit	1.00%
Maximum additional service years	10 years
Percentage of average monthly compensation in excess of covered compensation for each year of credited service	0.65%
Maximum period of credited service (years)	35 years
Covered compensation period (years)	35 years
Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution cost percentage	50.00%
Minimum age for eligibility before amendment	55 years
Contribution percentage before amendment	40.00%
Retiree premium percentage	100.00%
Cost of coverage contribution	50.00%
Premium contribution percentage after amendment	50.00%
Minimum | Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retiree age group range	55 years
Maximum | Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retiree age group range	65 years
Defined Contribution Profit Sharing, Savings and Investment Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer non-discretionary contribution amount	3.00%
Contribution cost percentage	50.00%
Defined contribution plan, employer matching contribution, percent of employees' gross pay	6.00%
Defined contribution plan, employer contribution, vesting period (years)		5 years

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Stock-based compensation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	15,000
Age limit for forfeiture of stock award	65 years
Restricted Stock | Share-based Compensation Award, Vesting Each Year Commencing with First Anniversary Date of Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percent	20.00%
Restricted Stock | Share-based Compensation Award, Vesting on Fifth Anniversary Date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percent	100.00%
Incentive Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	10,000
Cash compensation	$ 300,000
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual cash retainer paid		$ 6,000
Annual cash retainer paid to individuals		11,500
Director | Directors' Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	20,000
Award requisite service period (months)	12 months
Trading days period	30 days
Board of Directors Chairman
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual cash retainer paid to individuals		19,250
Audit Committee Chairman
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in annual cash retainer paid		2,875
Annual cash retainer paid to individuals		$ 14,375
Deferred Compensation, Share-based Payments
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum annual installments period (years)	10 years

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill and Intangible Assets (Details) $ in Thousands	1 Months Ended		12 Months Ended
	Nov. 30, 2013branch	Mar. 31, 2008branch	Dec. 31, 2020USD ($)segment
Finite-Lived Intangible Assets [Line Items]
Number of operating segments | segment			2
Bank of America
Finite-Lived Intangible Assets [Line Items]
Number of branches acquired | branch	6
Partners Trust Bank | Trust Business
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets | $			$ 200
Useful life (years)			15 years
Fort Orange Financial Corp
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets | $			$ 12
Useful life (years)			10 years
M&T Bank branch offices
Finite-Lived Intangible Assets [Line Items]
Number of branches acquired | branch		3

SUMMARY OF SIGNIFICANT ACCOUN_7

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 7,145	$ 8,001
Operating lease liabilities	$ 7,264	$ 8,084
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 8,600
Operating lease liabilities			$ 8,600

RESTRICTIONS ON CASH AND DUE _2

RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
RESTRICTIONS ON CASH AND DUE FROM BANK ACCOUNTS [Abstract]
Reserve requirement	$ 1.6	$ 1.6
Derivative, collateral, obligation to return cash	$ 19.1	$ 9.4

SECURITIES - Securities Availab

SECURITIES - Securities Available for Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortized cost and estimated fair value of debt securities available-for-sale
Amortized Cost	$ 542,362	$ 282,256
Estimated Fair Value	554,611	284,090
Unrealized Gains	12,654	3,146
Unrealized Losses	405	1,312
Amortized Cost
Within one year
After one, but within five years	27,215
After five, but within ten years	21,688
After ten years	759
Total	542,362	282,256
Fair Value
Within one year
After one, but within five years	28,757
After five, but within ten years	22,875
After ten years	808
Total	554,611	284,090
Proceeds from sales and calls of securities resulting in gains or losses
Proceeds	0	8,513	$ 0
Gross gains	0	159	0
Gross losses	0	(140)	0
Tax expense	0	5	$ 0
Mortgage-backed securities, residential
Amortized cost and estimated fair value of debt securities available-for-sale
Amortized Cost	458,245	225,029
Estimated Fair Value	467,866	225,234
Unrealized Gains	9,822	1,471
Unrealized Losses	201	1,266
Amortized Cost
Without single maturity date	458,245
Total	458,245	225,029
Fair Value
Without single maturity date	467,866
Total	467,866	225,234
Obligations of states and political subdivisions
Amortized cost and estimated fair value of debt securities available-for-sale
Amortized Cost	40,662	41,265
Estimated Fair Value	43,405	42,845
Unrealized Gains	2,743	1,580
Unrealized Losses	0	0
Amortized Cost
Total	40,662	41,265
Fair Value
Total	43,405	42,845
Corporate bonds and notes
Amortized cost and estimated fair value of debt securities available-for-sale
Amortized Cost	9,000	250
Estimated Fair Value	9,035	250
Unrealized Gains	47	0
Unrealized Losses	12	0
Amortized Cost
Total	9,000	250
Fair Value
Total	9,035	250
SBA loan pools
Amortized cost and estimated fair value of debt securities available-for-sale
Amortized Cost	34,455	15,712
Estimated Fair Value	34,305	15,761
Unrealized Gains	42	95
Unrealized Losses	192	46
Amortized Cost
Without single maturity date	34,455
Total	34,455	15,712
Fair Value
Without single maturity date	34,305
Total	$ 34,305	$ 15,761

SECURITIES - Securities Held to

SECURITIES - Securities Held to Maturity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Amortized cost and estimated fair value of securities held to maturity [Abstract]
Amortized Cost	$ 2,469,000	$ 3,115,000
Estimated Fair Value	2,501,000	3,139,000
Unrealized Gains	32,000	24,000
Unrealized Losses	0	0
Amortized Cost
Within one year	856,000
After one, but within five years	1,613,000
After five, but within ten years	0
After ten years	0
Total	2,469,000	3,115,000
Fair Value
Within one year	863,000
After one, but within five years	1,638,000
After five, but within ten years	0
After ten years	0
Total	2,501,000	3,139,000
Gain (loss) on sale of held-to-maturity securities	0	0
Obligations of states and political subdivisions
Amortized cost and estimated fair value of securities held to maturity [Abstract]
Amortized Cost	326,000	1,045,000
Estimated Fair Value	326,000	1,045,000
Unrealized Gains	0	0
Unrealized Losses	0	0
Amortized Cost
Total	326,000	1,045,000
Fair Value
Total	326,000	1,045,000
Time deposits with other financial institutions
Amortized cost and estimated fair value of securities held to maturity [Abstract]
Amortized Cost	2,143,000	2,070,000
Estimated Fair Value	2,175,000	2,094,000
Unrealized Gains	32,000	24,000
Unrealized Losses	0	0
Amortized Cost
Total	2,143,000	2,070,000
Fair Value
Total	$ 2,175,000	$ 2,094,000

SECURITIES - Investment Securit

SECURITIES - Investment Securities Available for Sale in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value
Less than 12 months	$ 88,270	$ 74,520
12 months or longer	4,606	55,748
Total	92,876	130,268
Unrealized Losses
Less than 12 months	368	800
12 months or longer	37	512
Total	405	1,312
Obligations of U.S. Government and U.S. Government sponsored enterprises
Fair Value
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Unrealized Losses
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Mortgage-backed securities, residential
Fair Value
Less than 12 months	70,037	71,506
12 months or longer	970	54,343
Total	71,007	125,849
Unrealized Losses
Less than 12 months	200	791
12 months or longer	1	475
Total	201	1,266
Obligations of states and political subdivisions
Fair Value
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Unrealized Losses
Less than 12 months	0	0
12 months or longer	0	0
Total	0	0
Corporate bonds and notes
Fair Value
Less than 12 months	2,988	0
12 months or longer	0	0
Total	2,988	0
Unrealized Losses
Less than 12 months	12	0
12 months or longer	0	0
Total	12	0
SBA loan pools
Fair Value
Less than 12 months	15,245	3,014
12 months or longer	3,636	1,405
Total	18,881	4,419
Unrealized Losses
Less than 12 months	156	9
12 months or longer	36	37
Total	$ 192	$ 46

SECURITIES - Securities Pledged

SECURITIES - Securities Pledged and Equity Method Investments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financial Instruments Owned and Pledged as Collateral [Line Items]
Fair value of securities pledged to secure public funds on deposit or for other purposes	$ 180.8	$ 205.9
Cephas Capital Partners, L.P.
Financial Instruments Owned and Pledged as Collateral [Line Items]
Equity method investments	$ 0.2	$ 0.3

LOANS AND ALLOWANCE FOR LOAN _3

LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	$ 1,536,463	$ 1,309,219
Interest receivable on loans	5,035	3,684
Total recorded investment in loans	1,541,498	1,312,903
Residential mortgages held for sale	170	1,185
Commercial, and Agricultural
Composition of loan portfolio [Abstract]
Total recorded investment in loans	370,252	230,922
Commercial mortgages
Composition of loan portfolio [Abstract]
Total recorded investment in loans	719,145	650,570
Commercial mortgages | Construction
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	61,945	43,962
Total recorded investment in loans	62,164	44,082
Commercial mortgages | Commercial mortgages
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	654,663	604,832
Total recorded investment in loans	656,981	606,488
Residential Mortgages
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	239,401	188,338
Total recorded investment in loans	240,013	188,874
Loans pledged as collateral	101,900	170,000
Consumer Loans
Composition of loan portfolio [Abstract]
Total recorded investment in loans	212,088	242,537
Consumer Loans | Home equity lines and loans
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	78,547	91,784
Total recorded investment in loans	78,761	92,065
Consumer Loans | Indirect Consumer Loans
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	120,538	134,973
Total recorded investment in loans	120,853	135,366
Consumer Loans | Direct consumer loans
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	12,423	15,038
Total recorded investment in loans	12,474	15,106
Commercial and industrial
Composition of loan portfolio [Abstract]
Payroll Protection Program Loans - CARES Act	150,900
Commercial and industrial | Commercial, and Agricultural
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	368,663	230,018
Total recorded investment in loans	369,968	230,648
Agricultural | Commercial, and Agricultural
Composition of loan portfolio [Abstract]
Loans, net of deferred loan fees	283	274
Total recorded investment in loans	$ 284	$ 274

LOANS AND ALLOWANCE FOR LOAN _4

LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	$ 23,478	$ 18,944	$ 21,161
Charge Offs	(7,380)	(1,975)	(5,919)
Recoveries	587	564	549
Net (charge offs) recoveries	(6,793)	(1,411)	(5,370)
Provision	4,239	5,945	3,153
Ending balance	20,924	23,478	18,944
Ending allowance balance attributable to loans:
Individually evaluated for impairment				$ 1,527	$ 8,097
Collectively evaluated for impairment				19,397	15,381
Allowance for loan losses	23,478	23,478	18,944	20,924	23,478
Loans:
Loans individually evaluated for impairment				10,589	15,665
Loans collectively evaluated for impairment				1,530,909	1,297,238
Total recorded investment in loans				1,541,498	1,312,903
Commercial, and Agricultural
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	10,227	5,383	6,976
Charge Offs	(4,068)	(312)	(3,644)
Recoveries	89	59	47
Net (charge offs) recoveries	(3,979)	(253)	(3,597)
Provision	(1,755)	5,097	2,004
Ending balance	4,493	10,227	5,383
Ending allowance balance attributable to loans:
Individually evaluated for impairment				1,401	6,000
Collectively evaluated for impairment				3,092	4,227
Allowance for loan losses	4,493	5,383	5,383	4,493	10,227
Loans:
Loans individually evaluated for impairment				3,400	6,147
Loans collectively evaluated for impairment				366,852	224,775
Total recorded investment in loans				370,252	230,922
Commercial mortgages
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	8,869	8,184	8,514
Charge Offs	(2,143)	(1)	(213)
Recoveries	14	4	3
Net (charge offs) recoveries	(2,129)	3	(210)
Provision	4,756	682	(120)
Ending balance	11,496	8,869	8,184
Ending allowance balance attributable to loans:
Individually evaluated for impairment				74	2,097
Collectively evaluated for impairment				11,422	6,772
Allowance for loan losses	8,869	8,869	8,184	11,496	8,869
Loans:
Loans individually evaluated for impairment				5,117	8,844
Loans collectively evaluated for impairment				714,028	641,726
Total recorded investment in loans				719,145	650,570
Residential Mortgages
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	1,252	1,226	1,316
Charge Offs	(56)	(151)	(226)
Recoveries	86	45	5
Net (charge offs) recoveries	30	(106)	(221)
Provision	797	132	131
Ending balance	2,079	1,252	1,226
Ending allowance balance attributable to loans:
Individually evaluated for impairment				0	0
Collectively evaluated for impairment				2,079	1,252
Allowance for loan losses	2,079	1,252	1,316	2,079	1,252
Loans:
Loans individually evaluated for impairment				1,271	525
Loans collectively evaluated for impairment				238,742	188,349
Total recorded investment in loans				240,013	188,874
Consumer Loans
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	3,130	4,151	4,355
Charge Offs	(1,113)	(1,511)	(1,836)
Recoveries	398	456	494
Net (charge offs) recoveries	(715)	(1,055)	(1,342)
Provision	441	34	1,138
Ending balance	2,856	3,130	4,151
Ending allowance balance attributable to loans:
Individually evaluated for impairment				52	0
Collectively evaluated for impairment				2,804	3,130
Allowance for loan losses	$ 3,130	$ 4,151	$ 4,151	2,856	3,130
Loans:
Loans individually evaluated for impairment				801	149
Loans collectively evaluated for impairment				211,287	242,388
Total recorded investment in loans				$ 212,088	$ 242,537

LOANS AND ALLOWANCE FOR LOAN _5

LOANS AND ALLOWANCE FOR LOAN LOSSES - Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Unpaid Principal Balance
Total	$ 16,546	$ 15,712
Recorded Investment
Total	10,589	15,665
Allowance for Loan Losses Allocated	1,527	8,097
Average Recorded Investment
With no related allowance recorded	14,690	14,423	$ 10,972
Interest Income Recognized
With no related allowance recorded	76	72	61
Residential Mortgages
Unpaid Principal Balance
With no related allowance recorded	1,283	554
Recorded Investment
With no related allowance recorded	1,271	525
Average Recorded Investment
With no related allowance recorded	952	422	416
Interest Income Recognized
With no related allowance recorded	25	44	7
Construction | Commercial mortgages
Unpaid Principal Balance
With no related allowance recorded	188	247
Recorded Investment
With no related allowance recorded	189	247
Average Recorded Investment
With no related allowance recorded	219	278	337
Interest Income Recognized
With no related allowance recorded	8	10	11
Commercial mortgages | Commercial mortgages
Unpaid Principal Balance
With no related allowance recorded	6,814	3,501
With an allowance recorded	258	5,093
Recorded Investment
With no related allowance recorded	4,760	3,503
With an allowance recorded	168	5,094
Allowance for Loan Losses Allocated	74	2,097
Average Recorded Investment
With no related allowance recorded	4,103	3,605	4,193
With an allowance recorded	2,949	6,524	2,315
Interest Income Recognized
With no related allowance recorded	16	12	21
With an allowance recorded	0	0	4
Home equity lines and loans | Consumer Loans
Unpaid Principal Balance
With no related allowance recorded	645	171
With an allowance recorded	170	0
Recorded Investment
With no related allowance recorded	631	149
With an allowance recorded	170	0
Allowance for Loan Losses Allocated	52	0
Average Recorded Investment
With no related allowance recorded	446	137	60
With an allowance recorded	104	0	0
Interest Income Recognized
With no related allowance recorded	7	6	3
With an allowance recorded	0	0	0
Commercial and industrial | Commercial and industrial
Unpaid Principal Balance
With no related allowance recorded	1,960	133
With an allowance recorded	5,228	6,013
Recorded Investment
With no related allowance recorded	1,963	133
With an allowance recorded	1,437	6,014
Allowance for Loan Losses Allocated	1,401	6,000
Average Recorded Investment
With no related allowance recorded	936	248	608
With an allowance recorded	4,981	3,209	3,043
Interest Income Recognized
With no related allowance recorded	16	0	12
With an allowance recorded	$ 4	$ 0	$ 3

LOANS AND ALLOWANCE FOR LOAN _6

LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	$ 9,952	$ 18,008
Loans Past Due 90 Days or More and Still Accruing	2	7
Past due	10,480	14,370
Loans Not Past Due	1,531,018	1,298,533
Total recorded investment in loans	1,541,498	1,312,903
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	4,598	4,672
60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	4,357	1,668
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,525	8,029
Commercial, and Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total recorded investment in loans	370,252	230,922
Commercial mortgages:
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total recorded investment in loans	719,145	650,570
Residential Mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,632	2,155
Loans Past Due 90 Days or More and Still Accruing	0	0
Past due	1,684	2,775
Loans Not Past Due	238,329	186,099
Total recorded investment in loans	240,013	188,874
Residential Mortgages | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	817	1,016
Residential Mortgages | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	406	803
Residential Mortgages | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	461	956
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total recorded investment in loans	212,088	242,537
Construction | Commercial mortgages:
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	55	80
Loans Past Due 90 Days or More and Still Accruing	0	0
Past due	0	0
Loans Not Past Due	62,164	44,082
Total recorded investment in loans	62,164	44,082
Construction | Commercial mortgages: | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Construction | Commercial mortgages: | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Construction | Commercial mortgages: | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Commercial mortgages | Commercial mortgages:
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	4,415	8,407
Loans Past Due 90 Days or More and Still Accruing	0	0
Past due	5,442	2,883
Loans Not Past Due	651,539	603,605
Total recorded investment in loans	656,981	606,488
Commercial mortgages | Commercial mortgages: | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,438	440
Commercial mortgages | Commercial mortgages: | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,696	277
Commercial mortgages | Commercial mortgages: | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	308	2,165
Home equity lines and loans | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,159	641
Loans Past Due 90 Days or More and Still Accruing	0	0
Past due	1,036	653
Loans Not Past Due	77,725	91,412
Total recorded investment in loans	78,761	92,065
Home equity lines and loans | Consumer Loans | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	521	353
Home equity lines and loans | Consumer Loans | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	41	151
Home equity lines and loans | Consumer Loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	474	149
Indirect Consumer Loans | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	519	571
Loans Past Due 90 Days or More and Still Accruing	0	0
Past due	1,718	2,278
Loans Not Past Due	119,135	133,088
Total recorded investment in loans	120,853	135,366
Indirect Consumer Loans | Consumer Loans | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,268	1,546
Indirect Consumer Loans | Consumer Loans | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	198	377
Indirect Consumer Loans | Consumer Loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	252	355
Direct consumer loans | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	5	7
Loans Past Due 90 Days or More and Still Accruing	0	0
Past due	36	49
Loans Not Past Due	12,438	15,057
Total recorded investment in loans	12,474	15,106
Direct consumer loans | Consumer Loans | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	34	32
Direct consumer loans | Consumer Loans | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2	11
Direct consumer loans | Consumer Loans | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	6
Commercial and industrial | Commercial, and Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,167	6,147
Loans Past Due 90 Days or More and Still Accruing	2	7
Past due	564	5,732
Loans Not Past Due	369,404	224,916
Total recorded investment in loans	369,968	230,648
Commercial and industrial | Commercial, and Agricultural | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	520	1,285
Commercial and industrial | Commercial, and Agricultural | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	14	49
Commercial and industrial | Commercial, and Agricultural | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	30	4,398
Agricultural | Commercial, and Agricultural
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Loans Not Past Due	284	274
Total recorded investment in loans	284	274
Agricultural | Commercial, and Agricultural | 30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Agricultural | Commercial, and Agricultural | 60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
Agricultural | Commercial, and Agricultural | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 0	$ 0

LOANS AND ALLOWANCE FOR LOAN _7

LOANS AND ALLOWANCE FOR LOAN LOSSES - Troubled Debt Restructuring (Details)	12 Months Ended
	Dec. 31, 2020USD ($)loanborrowerinstrument	Dec. 31, 2019USD ($)loan	Dec. 31, 2018USD ($)loan
Trouble debt restructurings [Abstract]
Recorded investment in troubled debt restructurings | $	$ 6,700,000	$ 9,000,000	$ 6,800,000
Specific reserves allocated to troubled debt restructuring | $	400,000	2,300,000	900,000
Troubled debt restructurings accruing interest under modified terms | $	2,800,000	900,000	800,000
Troubled debt restructurings on non-accrual status | $	3,900,000	8,100,000	6,000,000
Additional amounts committed to customers with loans classified as troubled debt restructurings | $	$ 17,000	$ 0	$ 0
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	15	3	2
Pre-Modification Outstanding Recorded Investment | $	$ 5,100,000	$ 4,483,000	$ 491,000
Post-Modification Outstanding Recorded Investment | $	5,100,000	4,483,000	491,000
Increase in allowance for loan losses related to troubled debt restructurings | $	200,000	1,700,000	400,000
Troubled debt restructurings, charge offs | $	$ 0	$ 0	$ 0
Number of days past due after which a loan is considered to be in payment default	90 days
Financing receivable, modifications, subsequent default, number of loans | instrument	1
Financing receivable, modifications, subsequent default, recorded investment | $	$ 170,000
Commercial mortgages | Commercial mortgages
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	4	1
Pre-Modification Outstanding Recorded Investment | $	$ 1,297,000	$ 4,223,000
Post-Modification Outstanding Recorded Investment | $	$ 1,297,000	$ 4,223,000
Residential Mortgages
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	4	1
Pre-Modification Outstanding Recorded Investment | $	$ 997,000	$ 123,000
Post-Modification Outstanding Recorded Investment | $	$ 997,000	$ 123,000
Consumer Loans | Home equity lines and loans
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	3	1
Pre-Modification Outstanding Recorded Investment | $	$ 738,000	$ 137,000
Post-Modification Outstanding Recorded Investment | $	$ 738,000	$ 137,000
Financing receivable, modifications, subsequent default, number of loans | instrument	1
Financing receivable, modifications, subsequent default, recorded investment | $	$ 170,000
Commercial And Consumer Portfolio Segment
Trouble debt restructurings [Abstract]
Financing receivable, modifications, loan balance remaining in modified status, modified more than once | $	$ 20,100,000
Financing receivable, number of loans remaining in modified status	31
Financing receivable, modifications, loan balance remaining in modified status | $	$ 20,800,000
Financing receivable, number of loans remaining in modified status, modified more than once	18
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	1,064
Post-Modification Outstanding Recorded Investment | $	$ 211,200,000
Principal Forgiveness | Commercial mortgages
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans		1
Principal Forgiveness | Residential Mortgage
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	1
Interest Rate Below Market Reduction | Consumer Loans | Home equity lines and loans
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans		1
Payment Deferral
Trouble debt restructurings [Abstract]
Financing receivable, modifications, number of days past due	30 days
Payment Deferral | Commercial mortgages
Trouble debt restructurings [Abstract]
Financing receivable, modifications, number of borrowers | borrower	3
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	4
Payment Deferral | Commercial mortgages | Substandard | Non-accrual Status
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	3
Payment Deferral | Commercial mortgages | Substandard | Non-accrual Status | 30 - 59 Days Past Due
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	2
Payment Deferral | Home equity lines and loans
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	3
Payment Deferral | Home equity lines and loans | Substandard | Non-accrual Status
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	3
Payment Deferral | Residential Mortgage
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	3
Payment Deferral | Residential Mortgage | Non-accrual Status
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	3
Payment Deferral | Residential Mortgage | Substandard | Non-accrual Status
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	2
Payment Deferral | Residential Mortgage | Substandard | Non-accrual Status | 30 - 59 Days Past Due
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	1
Extended Maturity and Interest Rate Below Market Reduction | Residential Mortgage
Trouble debt restructurings [Abstract]
Troubled debt restructuring, extension of maturity date, duration		13 years
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans		1
Extended Maturity and Interest Rate Below Market Reduction | Consumer Loans | Home equity lines and loans
Trouble debt restructurings [Abstract]
Troubled debt restructuring, extension of maturity date, duration		3 years
Commercial and industrial | Commercial, and Agricultural
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	4		2
Pre-Modification Outstanding Recorded Investment | $	$ 2,068,000		$ 491,000
Post-Modification Outstanding Recorded Investment | $	$ 2,068,000		$ 491,000
Commercial and industrial | Interest Rate Below Market Reduction
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	2
Commercial and industrial | Interest Rate Below Market Reduction | Non-accrual Status
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	1
Commercial and industrial | Extended Maturity
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	2
Commercial and industrial | Extended Maturity and Interest Rate Below Market Reduction
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans	1
Commercial and industrial | Extended Maturity and Interest Rate Below Market Reduction | Commercial, and Agricultural
Loans by class modified as troubled debt restructurings [Abstract]
Number of Loans			2

LOANS AND ALLOWANCE FOR LOAN _8

LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Quality Indicator (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Number of days past due after which a retail loan is rated	90 days
Total recorded investment in loans	$ 1,541,498	$ 1,312,903
Loans	1,515,539	1,285,741
Not Rated
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	448,787	428,037
Pass
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	1,036,759	826,396
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	26,630	18,534
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	26,813	29,701
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	2,509	10,235
Commercial, and Agricultural
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	370,252	230,922
Commercial mortgages:
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	719,145	650,570
Commercial mortgages: | Construction
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	62,164	44,082
Commercial mortgages: | Commercial mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	656,981	606,488
Commercial mortgages: | Not Rated | Construction
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Commercial mortgages: | Not Rated | Commercial mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Commercial mortgages: | Pass | Construction
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	59,885	40,304
Commercial mortgages: | Pass | Commercial mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	616,090	577,266
Commercial mortgages: | Special Mention | Construction
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	168
Commercial mortgages: | Special Mention | Commercial mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	23,631	12,451
Commercial mortgages: | Substandard | Construction
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	2,279	3,610
Commercial mortgages: | Substandard | Commercial mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	16,128	12,356
Commercial mortgages: | Doubtful | Construction
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Commercial mortgages: | Doubtful | Commercial mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	1,132	4,415
Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	240,013	188,874
Loans	240,013	188,874
Residential Mortgages | Not Rated
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	238,381	186,719
Residential Mortgages | Pass
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans		0
Residential Mortgages | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Residential Mortgages | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	1,632	2,155
Residential Mortgages | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	212,088	242,537
Consumer Loans | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	78,761	92,065
Loans	78,761	92,065
Consumer Loans | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	120,853	135,366
Loans	120,853	135,366
Consumer Loans | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	12,474	15,106
Loans	12,474	15,106
Consumer Loans | Not Rated | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	77,602	91,424
Consumer Loans | Not Rated | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	120,334	134,795
Consumer Loans | Not Rated | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	12,470	15,099
Consumer Loans | Pass | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Pass | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Pass | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Special Mention | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Special Mention | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Special Mention | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Substandard | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	1,159	641
Consumer Loans | Substandard | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	519	571
Consumer Loans | Substandard | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	4	7
Consumer Loans | Doubtful | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Doubtful | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Consumer Loans | Doubtful | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Commercial and industrial | Commercial, and Agricultural
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	369,968	230,648
Commercial and industrial | Commercial, and Agricultural | Not Rated
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Commercial and industrial | Commercial, and Agricultural | Pass
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	360,500	208,552
Commercial and industrial | Commercial, and Agricultural | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	2,999	5,915
Commercial and industrial | Commercial, and Agricultural | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	5,092	10,361
Commercial and industrial | Commercial, and Agricultural | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	1,377	5,820
Agricultural | Commercial, and Agricultural
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	284	274
Agricultural | Commercial, and Agricultural | Not Rated
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Agricultural | Commercial, and Agricultural | Pass
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	284	274
Agricultural | Commercial, and Agricultural | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Agricultural | Commercial, and Agricultural | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Agricultural | Commercial, and Agricultural | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total recorded investment in loans	0	0
Performing | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans	238,381	186,719
Performing | Consumer Loans | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Loans	77,602	91,424
Performing | Consumer Loans | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	120,334	134,795
Performing | Consumer Loans | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Loans	12,470	15,099
Non-Performing | Residential Mortgages
Financing Receivable, Recorded Investment [Line Items]
Loans	1,632	2,155
Non-Performing | Consumer Loans | Home equity lines and loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,159	641
Non-Performing | Consumer Loans | Indirect Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Loans	519	571
Non-Performing | Consumer Loans | Direct consumer loans
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 4	$ 7

PREMISES AND EQUIPMENT - Premis

PREMISES AND EQUIPMENT - Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Premises and equipment [Abstract]
Premises and equipment, gross	$ 89,293	$ 89,088
Less accumulated depreciation and amortization	69,174	66,671
Net book value	20,119	22,417
Depreciation expense	2,918	3,112	$ 3,437
Land
Premises and equipment [Abstract]
Premises and equipment, gross	4,803	4,803
Buildings
Premises and equipment [Abstract]
Premises and equipment, gross	41,957	41,408
Projects in progress
Premises and equipment [Abstract]
Premises and equipment, gross	65	113
Equipment and furniture
Premises and equipment [Abstract]
Premises and equipment, gross	37,183	37,007
Leasehold improvements
Premises and equipment [Abstract]
Premises and equipment, gross	$ 5,285	$ 5,757

PREMISES AND EQUIPMENT - Leases

PREMISES AND EQUIPMENT - Leases in Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Buildings	$ 5,572	$ 5,572
Less: accumulated depreciation	(1,875)	(1,541)
Net book value	$ 3,697	$ 4,031

LEASES - Narrative (Details)

LEASES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 28, 2021	Nov. 30, 2020
Lessee, Lease, Description [Line Items]
Operating lease, weighted average remaining lease term (years)	10 years 3 months 18 days
Operating lease, weighted average discount rate	3.39%
Rent expense	$ 1,000,000	$ 1,000,000
Rent expense			$ 1,100,000
Operating lease, liability, termination					$ 200,000
Operating lease not yet commenced	0
Operating lease right-of-use assets	7,145,000	8,001,000
Operating lease liabilities	$ 7,264,000	$ 8,084,000
Finance lease, weighted average remaining lease term (years)	12 years 1 month 6 days
Finance lease, weighted average discount rate	3.36%
Finance lease not yet commenced	$ 0
Branch Location, Western New York Location | Subsequent Event
Lessee, Lease, Description [Line Items]
Operating lease, term (in years)				3 years
Operating lease right-of-use assets				$ 100,000
Operating lease liabilities				$ 100,000

LEASES - Leased Branch Properti

LEASES - Leased Branch Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 8,001	$ 8,713
Less: accumulated amortization	(705)	(712)
Less: Lease termination	(151)	0
Operating lease right-of-use-assets, net	$ 7,145	$ 8,001

LEASES - Maturities of Operatin

LEASES - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2021	$ 907
2022	846
2023	866
2024	857
2025	841
2026 and thereafter	4,349
Total minimum lease payments	8,666
Less: amount representing interest	(1,402)
Present value of net minimum lease payments	$ 7,264	$ 8,084

LEASES - Future Minimum Lease P

LEASES - Future Minimum Lease Payment Obligations Under Capital Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2021	$ 388
2022	391
2023	391
2024	391
2025	409
2026 and thereafter	2,839
Total minimum lease payments	4,809
Less: amount representing interest	(960)
Present value of net minimum lease payments	$ 3,849	$ 4,085

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning of year	$ 21,824	$ 21,824
Acquired goodwill	0	0
End of year	21,824	21,824	$ 21,824
Balance Acquired	11,608	11,608
Accumulated Amortization	11,350	10,866
Aggregate amortization expense	484	609	$ 734
Remaining estimated aggregate amortization expense [Abstract]
2021	258
Total	258
Core deposit intangibles
Goodwill [Roll Forward]
Balance Acquired	5,975	5,975
Accumulated Amortization	5,962	5,832
Other customer relationship intangibles
Goodwill [Roll Forward]
Balance Acquired	5,633	5,633
Accumulated Amortization	$ 5,388	$ 5,034

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Summary of deposits [Abstract]
Non-interest-bearing demand deposits	$ 620,423	$ 468,238
Interest-bearing demand deposits	282,172	200,089
Insured money market accounts	603,583	530,242
Savings deposits	245,865	212,393
Time deposits	285,731	161,176
Total deposits	2,037,774	1,572,138
Scheduled maturities of time deposits [Abstract]
2021	193,113
2022	75,890
2023	12,784
2024	0
2025	1,084
2026	2,860
Total	285,731	161,176
Time Deposits 250,000, Or More	$ 31,200	$ 27,700

SECURITIES SOLD UNDER AGREEME_3

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of Repurchase Agreements [Abstract]
Securities sold under agreements to repurchase	$ 0	$ 0	$ 0
Maximum month-end balance	0	0	10,000,000
Average balance during year	$ 0	$ 0	$ 3,644,000
Weighted-average interest rate at December 31	0.00%	0.00%	0.00%
Average interest rate paid during year	0.00%	0.00%	3.77%

FEDERAL HOME LOAN BANK TERM A_2

FEDERAL HOME LOAN BANK TERM ADVANCES AND OVERNIGHT ADVANCES (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances, Maturity Periods [Line Items]
FHLBNY amount of advances	$ 0	$ 0
Maximum amount eligible to borrow	86,300,000
Residential Mortgages
Federal Home Loan Bank, Advances, Maturity Periods [Line Items]
Loans pledged as collateral	$ 101,900,000	$ 170,000,000

REVENUE FROM CONTRACTS WITH C_3

REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net gains on sales of other real estate	$ (79)	$ (99)	$ 90
Change in fair value of equity investments	89	81	2,004
Income from bank owned life insurance	161	63	66
Total non-interest income	21,124	20,073	23,074
Overdraft Fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	2,304	3,653	3,934
Service Charge on Deposits, Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	830	807	793
Interchange Revenue
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	4,068	4,104	4,040
WMG
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	9,492	9,503	9,317
Investment Brokerage
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	657	673	510
Sale of OREO
Disaggregation of Revenue [Line Items]
Net gains on sales of other real estate	(79)	(99)	90
Sale of Loans
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	1,730	248	351
Loan Servicing Fees
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	121	103	92
Sale of Securities
Disaggregation of Revenue [Line Items]
Net gains on sales of securities		19
Change in fair value of equity investments	89
Product and Service, Other
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	1,751	981	1,943
Core Banking
Disaggregation of Revenue [Line Items]
Change in fair value of equity investments		143	2,024
Income from bank owned life insurance	161
Total non-interest income	10,982	10,356	13,596
Core Banking | Overdraft Fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	2,304	3,653	3,934
Core Banking | Service Charge on Deposits, Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	830	807	793
Core Banking | Interchange Revenue
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	4,068	4,104	4,040
Core Banking | WMG
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
Core Banking | Investment Brokerage
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
Core Banking | Sale of OREO
Disaggregation of Revenue [Line Items]
Net gains on sales of other real estate	(79)	(99)	90
Core Banking | Sale of Loans
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	1,730	248	351
Core Banking | Loan Servicing Fees
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	121	103	92
Core Banking | Sale of Securities
Disaggregation of Revenue [Line Items]
Net gains on sales of securities		19
Change in fair value of equity investments	139
Core Banking | Product and Service, Other
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	1,708	1,378	2,272
WMG
Disaggregation of Revenue [Line Items]
Change in fair value of equity investments		0	0
Income from bank owned life insurance
Total non-interest income	9,492	9,503	9,317
WMG | Overdraft Fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
WMG | Service Charge on Deposits, Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
WMG | Interchange Revenue
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
WMG | WMG
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	9,492	9,503	9,317
WMG | Investment Brokerage
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
WMG | Sale of OREO
Disaggregation of Revenue [Line Items]
Net gains on sales of other real estate	0	0	0
WMG | Sale of Loans
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	0	0	0
WMG | Loan Servicing Fees
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	0	0	0
WMG | Sale of Securities
Disaggregation of Revenue [Line Items]
Net gains on sales of securities		0
Change in fair value of equity investments	0
WMG | Product and Service, Other
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	0	0	0
Holding Company, CFS, and CRM
Disaggregation of Revenue [Line Items]
Change in fair value of equity investments		(62)	(20)
Income from bank owned life insurance	0
Total non-interest income	650	214	161
Holding Company, CFS, and CRM | Overdraft Fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
Holding Company, CFS, and CRM | Service Charge on Deposits, Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
Holding Company, CFS, and CRM | Interchange Revenue
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
Holding Company, CFS, and CRM | WMG
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	0	0	0
Holding Company, CFS, and CRM | Investment Brokerage
Disaggregation of Revenue [Line Items]
Revenues from contracts with customer	657	673	510
Holding Company, CFS, and CRM | Sale of OREO
Disaggregation of Revenue [Line Items]
Net gains on sales of other real estate	0	0	0
Holding Company, CFS, and CRM | Sale of Loans
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	0	0	0
Holding Company, CFS, and CRM | Loan Servicing Fees
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	0	0	0
Holding Company, CFS, and CRM | Sale of Securities
Disaggregation of Revenue [Line Items]
Net gains on sales of securities		0
Change in fair value of equity investments	(50)
Holding Company, CFS, and CRM | Product and Service, Other
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	$ 43	$ (397)	$ (329)

DERIVATIVES (Details)

DERIVATIVES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)instrument	Dec. 31, 2019USD ($)instrument	Dec. 31, 2018USD ($)instrument
Derivative [Line Items]
Unrealized gain (loss) recognized in other non-interest income	$ 8	$ (224)	$ (65)
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Number of Instruments | instrument	56	33	28
Notional Amount	$ 377,010	$ 238,227	$ 172,932
Fair Value Other Assets/ (Other Liabilities)	(357)	$ (365)	$ (140)
Derivatives not designated as hedging instruments: | Swap
Derivative [Line Items]
Notional Amount	$ 358,200
Derivatives not designated as hedging instruments: | Interest Rate Swap
Derivative [Line Items]
Number of Instruments | instrument	26	15	11
Notional Amount	$ 179,085	$ 113,204	$ 76,395
Weighted Average Maturity (in years)	7 years 8 months 12 days	7 years 10 months 24 days	7 years 1 month 6 days
Fair Value Other Assets/ (Other Liabilities)	$ (15,024)	$ (6,800)	$ (3,255)
Unrealized gain (loss) recognized in other non-interest income	$ (8,224)	$ (3,544)	$ (2,281)
Derivatives not designated as hedging instruments: | Interest Rate Swap | Weighted Average Interest Rate Received
Derivative [Line Items]
Average interest rate	3.95%	4.44%	4.69%
Derivatives not designated as hedging instruments: | Interest Rate Swap | Weighted Average Contract Pay Rate
Derivative [Line Items]
Average interest rate	2.20%	4.03%	4.61%
Derivatives not designated as hedging instruments: | Reverse Interest Rate Swap
Derivative [Line Items]
Number of Instruments | instrument	26	15	11
Notional Amount	$ 179,085	$ 113,204	$ 76,395
Weighted Average Maturity (in years)	7 years 8 months 12 days	7 years 10 months 24 days	7 years 1 month 6 days
Fair Value Other Assets/ (Other Liabilities)	$ 14,702	$ 6,466	$ 3,142
Unrealized gain (loss) recognized in other non-interest income	$ 8,236	$ 3,324	$ 2,168
Derivatives not designated as hedging instruments: | Reverse Interest Rate Swap | Weighted Average Interest Rate Received
Derivative [Line Items]
Average interest rate	2.20%	4.03%	4.61%
Derivatives not designated as hedging instruments: | Reverse Interest Rate Swap | Weighted Average Contract Pay Rate
Derivative [Line Items]
Average interest rate	3.95%	4.44%	4.69%
Derivatives not designated as hedging instruments: | Risk participation agreements
Derivative [Line Items]
Number of Instruments | instrument	4	3	6
Notional Amount	$ 18,840	$ 11,819	$ 20,142
Weighted Average Maturity (in years)	2 years 9 months 18 days	5 years 7 months 6 days	15 years
Fair Value Other Assets/ (Other Liabilities)	$ (35)	$ (31)	$ (27)
Off-balance sheet risk	400	400
Unrealized gain (loss) recognized in other non-interest income	$ (4)	$ (4)	$ 48

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of income tax expense attributable to income from operations [Abstract]
Federal	$ 4,413,000	$ 4,603,000	$ 1,732,000
State	280,000	395,000	124,000
Total current	4,693,000	4,998,000	1,856,000
Deferred expense/(benefit):
Federal	(136,000)	(1,126,000)	2,253,000
State	50,000	(438,000)	345,000
Remeasurement of deferred tax assets	0	0	(445,000)
Total deferred	(86,000)	(1,564,000)	2,153,000
Income tax expense	$ 4,607,000	$ 3,434,000	$ 4,009,000
Reconciliation of income tax expense [Abstract]
Statutory federal tax rate	21.00%	21.00%	21.00%
Tax computed at statutory rate	$ 5,013,000	$ 3,999,000	$ 4,963,000
Tax-exempt income	(395,000)	(424,000)	(430,000)
831(b) premium adjustment	(296,000)	(189,000)	(167,000)
Dividend exclusion	(5,000)	(7,000)	(7,000)
State taxes, net of Federal impact	118,000	(86,000)	262,000
Nondeductible interest expense	5,000	9,000	7,000
Remeasurement of deferred tax assets	0	0	(445,000)
Other items, net	167,000	132,000	(174,000)
Income tax expense	$ 4,607,000	$ 3,434,000	$ 4,009,000
Effective tax rate	19.30%	18.00%	17.00%
Deferred tax assets:
Allowance for loan losses	$ 5,393,000	$ 6,046,000
Accrual for employee benefit plans	47,000	92,000
Depreciation	681,000	379,000
Deferred compensation and directors' fees	1,045,000	765,000
Operating lease liabilities	1,831,000	2,050,000
Purchase accounting adjustment – loans	1,000	1,000
Purchase accounting adjustment – fixed assets	149,000	149,000
Gain on deemed sale of securities	54,000	71,000
Accounting for defined benefit pension and other benefit plans	2,302,000	2,448,000
Nonaccrued interest	687,000	695,000
Accrued expense	158,000	179,000
Other items, net	48,000	38,000
Total gross deferred tax assets	12,396,000	12,913,000
Deferred tax liabilities:
Deferred loan fees and costs	274,000	592,000
Prepaid pension	3,344,000	3,189,000
Net unrealized gains on securities available for sale	3,124,000	468,000
Discount accretion	50,000	24,000
Core deposit intangible	1,353,000	1,213,000
REIT dividend	616,000	922,000
Operating lease right-of-use assets	1,831,000	2,050,000
Other	168,000	103,000
Total gross deferred tax liabilities	10,760,000	8,561,000
Net deferred tax asset	1,636,000	4,352,000
Unrecognized tax benefits	0	0	$ 0
Accrued interest or penalties related to uncertain tax positions	$ 0	$ 0	$ 0

PENSION PLAN AND OTHER BENEFI_3

PENSION PLAN AND OTHER BENEFIT PLANS - Changes in Projected Benefit Obligation and Plan Assets, and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in projected benefit obligation:
Service cost	$ 0	$ 0
Curtailments	0	0
Pension Plan
Change in projected benefit obligation:
Benefit obligation at beginning of year	39,886	36,022
Service cost	0	0	$ 0
Interest cost	1,300	1,522	1,551
Actuarial (gain) loss	3,735	4,474
Settlements	0	0	(3,300)
Benefits paid	(2,140)	(2,132)
Benefit obligation at end of year	42,781	39,886	36,022
Change in plan assets:
Fair value of plan assets at beginning of year	45,557	41,476
Actual return on plan assets	6,717	6,213
Employer contributions	0	0
Settlements	0	0
Benefits paid	(2,140)	(2,132)
Fair value of plan assets at end of year	50,134	45,557	41,476
Funded status of plan	7,353	5,671
Defined Benefit Health Care Plan
Change in projected benefit obligation:
Benefit obligation at beginning of year	332	363
Service cost	0	0	0
Interest cost	9	16	16
Participant contributions	35	49
Amendments	0	0
Actuarial (gain) loss	(57)	31
Benefits paid	(70)	(127)
Benefit obligation at end of year	249	332	363
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Employer contributions	35	78
Participant contributions	35	49
Benefits paid	(70)	(127)
Fair value of plan assets at end of year	0	0	0
Funded status of plan	(249)	(332)
Executive Supplemental Pension Plan
Change in projected benefit obligation:
Benefit obligation at beginning of year	1,232	1,179
Service cost	0	0	0
Interest cost	39	49	46
Actuarial (gain) loss	89	113
Benefits paid	(109)	(109)
Benefit obligation at end of year	1,251	1,232	1,179
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Employer contributions	109	109
Benefits paid	(109)	(109)
Fair value of plan assets at end of year	0	0	$ 0
Funded status of plan	$ (1,251)	$ (1,232)

PENSION PLAN AND OTHER BENEFI_4

PENSION PLAN AND OTHER BENEFIT PLANS - Amounts Recognized, Assumptions Used, Target and Actual Allocation, Fair Value, Estimated Future Benefit Payments, and Other Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net periodic benefit cost [Abstract]
Service cost	$ 0	$ 0
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): [Abstract]
Net actuarial (gain) loss	506	(626)	$ (711)
Recognized actuarial loss	300	312	318
Prior service credit	0	0	0
Amortization of prior service benefit	(220)	(220)	(220)
Total before tax effect	$ 586	(534)	215
Unrecognized net gain or loss increase threshold percentage for amortization of obligation (in hundredths)	10.00%
Pension Plan
Amount recognized in accumulated other comprehensive income [Abstract]
Net actuarial loss	$ 8,602	9,352
Prior service cost	0	0
Total before tax effects	8,602	9,352
Accumulated benefit obligation	42,800	39,900
Net periodic benefit cost [Abstract]
Service cost	0	0	0
Interest cost	1,300	1,522	1,551
Expected return on plan assets	(2,444)	(2,221)	(3,309)
Recognized actuarial loss	213	204	188
Amortization of  prior service cost	0	0	0
Recognized (gain) loss due to settlements	0	0	828
Net periodic cost (benefit)	(931)	(495)	(742)
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): [Abstract]
Net actuarial (gain) loss	(538)	481	736
Recognized actuarial loss	(213)	(204)	(1,016)
Amortization of prior service benefit	0	0	0
Total before tax effect	(751)	277	(280)
Total recognized in net (benefit) cost and other comprehensive income (loss) (before tax effect)	$ (1,682)	$ (218)	$ (1,022)
Weighted-average assumptions for net periodic cost [Abstract]
Discount rate	3.33%	4.35%	3.74%
Expected return on assets	5.50%	5.50%	7.25%
Discount rate	2.61%	3.33%	4.35%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	100.00%	100.00%
Expected return on assets	5.50%	5.50%	7.25%
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	$ 50,134	$ 45,557	$ 41,476
Estimated benefit payments for each of next five years and aggregate amount expected to be paid [Abstract]
2021	2,273
2022	2,279
2023	2,276
2024	2,283
2025	2,284
2026-2030	11,379
Pension Plan | Carrying Value
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	50,134	45,557
Pension Plan | Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	47,541	41,477
Pension Plan | Fair Value | Significant Other Observable Inputs (Level 2)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	2,593	4,080
Pension Plan | Fair Value | Significant Unobservable Inputs (Level 3)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	$ 0	$ 0
Pension Plan | Large-Cap Domestic Equities
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	8.70%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	43.00%	38.00%
Expected return on assets	8.70%
Pension Plan | Large-Cap Domestic Equities | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	20.00%
Pension Plan | Large-Cap Domestic Equities | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	50.00%
Pension Plan | Mid-Cap Domestic Equities
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	9.40%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	2.00%	2.00%
Expected return on assets	9.40%
Pension Plan | Mid-Cap Domestic Equities | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	0.00%
Pension Plan | Mid-Cap Domestic Equities | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	15.00%
Pension Plan | Small-Cap Domestic Equities
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	8.80%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	3.00%	2.00%
Expected return on assets	8.80%
Pension Plan | Small-Cap Domestic Equities | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	0.00%
Pension Plan | Small-Cap Domestic Equities | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	10.00%
Pension Plan | Equity Securities - International Companies
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	5.10%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	3.00%	8.00%
Expected return on assets	5.10%
Pension Plan | Equity Securities - International Companies | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	0.00%
Pension Plan | Equity Securities - International Companies | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	20.00%
Pension Plan | Intermediate Fixed Income
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	4.70%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	45.00%	45.00%
Expected return on assets	4.70%
Pension Plan | Intermediate Fixed Income | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	30.00%
Pension Plan | Intermediate Fixed Income | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	70.00%
Pension Plan | Alternative Assets
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	0.00%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	0.00%	0.00%
Expected return on assets	0.00%
Pension Plan | Alternative Assets | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	0.00%
Pension Plan | Alternative Assets | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	10.00%
Pension Plan | Cash
Weighted-average assumptions for net periodic cost [Abstract]
Expected return on assets	1.30%
Target allocations of plan assets [Abstract]
Percentage of plan assets (in hundredths)	4.00%	5.00%
Expected return on assets	1.30%
Pension Plan | Cash | Minimum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	0.00%
Pension Plan | Cash | Maximum
Target allocations of plan assets [Abstract]
Target allocation, minimum (in hundredths)	20.00%
Pension Plan | Cash | Carrying Value
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	$ 2,047	$ 2,210
Pension Plan | Cash | Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	2,047	2,210
Pension Plan | Cash | Fair Value | Significant Other Observable Inputs (Level 2)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Cash | Fair Value | Significant Unobservable Inputs (Level 3)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Equity Securities - U.S. Companies | Carrying Value
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	21,716	17,939
Pension Plan | Equity Securities - U.S. Companies | Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	21,716	17,939
Pension Plan | Equity Securities - U.S. Companies | Fair Value | Significant Other Observable Inputs (Level 2)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Equity Securities - U.S. Companies | Fair Value | Significant Unobservable Inputs (Level 3)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Mutual Funds | Carrying Value
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	23,778	21,328
Pension Plan | Mutual Funds | Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	23,778	21,328
Pension Plan | Mutual Funds | Fair Value | Significant Other Observable Inputs (Level 2)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Mutual Funds | Fair Value | Significant Unobservable Inputs (Level 3)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | U.S. Treasuries/Government Bonds | Carrying Value
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	2,318	3,054
Pension Plan | U.S. Treasuries/Government Bonds | Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | U.S. Treasuries/Government Bonds | Fair Value | Significant Other Observable Inputs (Level 2)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	2,318	3,054
Pension Plan | U.S. Treasuries/Government Bonds | Fair Value | Significant Unobservable Inputs (Level 3)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Corporate bonds and notes | Carrying Value
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	275	1,026
Pension Plan | Corporate bonds and notes | Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Pension Plan | Corporate bonds and notes | Fair Value | Significant Other Observable Inputs (Level 2)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	275	1,026
Pension Plan | Corporate bonds and notes | Fair Value | Significant Unobservable Inputs (Level 3)
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	0	0
Defined Benefit Health Care Plan
Amount recognized in accumulated other comprehensive income [Abstract]
Net actuarial loss	286	417
Prior service cost	(220)	(440)
Total before tax effects	66	(23)
Net periodic benefit cost [Abstract]
Service cost	0	0	0
Interest cost	9	16	16
Expected return on plan assets	0	0	0
Recognized actuarial loss	74	105	123
Recognized prior service benefit due to curtailments	0	0	0
Amortization of  prior service cost	(220)	(220)	(220)
Net periodic cost (benefit)	(137)	(99)	(81)
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): [Abstract]
Net actuarial (gain) loss	(57)	31	22
Recognized actuarial loss	(74)	(105)	(123)
Prior service credit	0	0	0
Amortization of prior service benefit	220	220	220
Total before tax effect	89	146	119
Total recognized in net (benefit) cost and other comprehensive income (loss) (before tax effect)	$ (48)	$ 47	$ 38
Average future working lifetime of active participants	5 years
Weighted-average assumptions for net periodic cost [Abstract]
Discount rate	3.33%	4.35%	3.74%
Discount rate	2.61%	3.33%	4.35%
Health care cost trend: Ultimate (Pre-65/Post 65)			5.00%
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	$ 0	$ 0	$ 0
Estimated benefit payments for each of next five years and aggregate amount expected to be paid [Abstract]
2021	48
2022	35
2023	36
2024	20
2025	19
2026-2030	$ 74
Health care cost trend: Initial			6.50%
Defined Benefit Health Care Plan | Minimum
Weighted-average assumptions for net periodic cost [Abstract]
Health care cost trend rate assumed, next fiscal year	6.95%	6.95%	6.95%
Health care cost trend: Ultimate (Pre-65/Post 65)	4.75%	4.75%	4.75%
Estimated benefit payments for each of next five years and aggregate amount expected to be paid [Abstract]
Health care cost trend: Initial	6.95%	6.95%
Defined Benefit Health Care Plan | Maximum
Weighted-average assumptions for net periodic cost [Abstract]
Health care cost trend rate assumed, next fiscal year	5.45%	5.45%	5.45%
Health care cost trend: Ultimate (Pre-65/Post 65)	4.75%	4.75%	4.75%
Estimated benefit payments for each of next five years and aggregate amount expected to be paid [Abstract]
Health care cost trend: Initial	5.45%	5.45%
Executive Supplemental Pension Plan
Amount recognized in accumulated other comprehensive income [Abstract]
Net actuarial loss	$ 359	$ 283
Prior service cost	0	0
Total before tax effects	359	283
Accumulated benefit obligation	1,300	1,200
Net periodic benefit cost [Abstract]
Service cost	0	0	$ 0
Interest cost	39	49	46
Recognized actuarial loss	13	4	7
Net periodic cost (benefit)	52	53	53
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): [Abstract]
Net actuarial (gain) loss	89	113	(47)
Recognized actuarial loss	(13)	(4)	(7)
Total before tax effect	76	109	(54)
Total recognized in net (benefit) cost and other comprehensive income (loss) (before tax effect)	$ 128	$ 162	$ (1)
Unrecognized net gain or loss increase threshold percentage for amortization of obligation (in hundredths)	10.00%
Weighted-average assumptions for net periodic cost [Abstract]
Discount rate	3.33%	4.35%	3.74%
Discount rate	2.61%	3.33%	4.35%
Fair value plan assets by asset class [Abstract]
Fair value of plan assets	$ 0	$ 0	$ 0
Estimated benefit payments for each of next five years and aggregate amount expected to be paid [Abstract]
2021	108
2022	106
2023	104
2024	101
2025	97
2026-2030	$ 417

PENSION PLAN AND OTHER BENEFI_5

PENSION PLAN AND OTHER BENEFIT PLANS - Additional Information (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Oct. 20, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Hours requirement to be eligible		1000 hours
Total unrecognized net loss increased percentage of obligation amortization threshold			10.00%
Defined Contribution Profit Sharing, Savings and Investment Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer non-discretionary contribution amount			3.00%
Contribution cost percentage			50.00%
Defined contribution plan, employer matching contribution, percent of employees' gross pay			6.00%
Total expense			$ 1,300	$ 1,300	$ 1,200
Chemung common stock included in defined contribution plan assets (in shares)			137,698	155,696	148,716
Defined Contribution Supplemental Executive Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Total expense			$ 400	$ 400	$ 300
Balance in the plan			2,000	1,600
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Lump sum settlement payments to employee			0	0	3,300
Settlement charge			0	$ 0	$ 828
Actuarial Gain (Loss), Increase (Decrease) due to change in discount rate			$ 3,500
Percentage of combined loss of expected year end obligations (less than)			0.01
Other comprehensive income, defined benefit plans, increase (decrease) in net unamortized gain loss arising during period net of tax			$ 800
Other comprehensive income, defined benefit plans, increase (decrease) in net unamortized gain loss arising during period net of tax, due to variance of actual and expected return on plan assets			$ (4,300)
Total unrecognized net loss increased (decreased) percentage of plan assets threshold			10.00%
Average total life expectancy of participants (years)	23 years 9 months 10 days
Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Evaluation period of expected long-term return on plan assets			3 years
Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Evaluation period of expected long-term return on plan assets			5 years
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in accumulated benefit obligation due to change in discount rate			$ 10
Increase (decrease) in accumulated benefit obligation due to discount Rate, claims and date experience			(65)
Other comprehensive income, defined benefit plans, increase (decrease) in net unamortized gain loss arising during period net of tax			$ (131)
Contribution cost percentage			50.00%
Percentage Increase (Decrease) in unrecognized net loss of the projected benefit obligation			(0.392)
Estimated employer contributions in next fiscal year			$ 48
Average future working lifetime of active participants			5 years
Executive Supplemental Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial Gain (Loss), Increase (Decrease) due to change in discount rate			$ (69)
Percentage of combined loss of expected year end obligations (less than)			0.01
Actuarial Gain (Loss), Increase (Decrease) due to change in mortality losses			$ (23)
Total unrecognized net loss increased percentage of obligation amortization threshold			10.00%
Total unrecognized net loss increased (decreased) percentage of plan assets threshold			10.00%
Average total life expectancy of participants (years)			12 years 14 days
Percentage Increase (Decrease) in unrecognized net loss of the projected benefit obligation			0.062
Estimated employer contributions in next fiscal year			$ 110
Defined benefit plan, increase(decrease) in total unrecognized net loss			$ 76

STOCK COMPENSATION (Details)

STOCK COMPENSATION (Details) - USD ($)	1 Months Ended			12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restricted Stock
Shares [Roll Forward]
Nonvested, beginning of period (in shares)	31,830	33,575		33,575
Granted (in shares)				14,805
Vested (in shares)				(16,438)
Forfeited or cancelled (in shares)				(112)
Nonvested, end of period (in shares)				31,830	33,575
Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested, beginning of period (in dollars per share)	$ 40.32	$ 43.24		$ 43.24
Granted (in dollars per share)				35.21
Vested (in dollars per share)				41.65
Forfeitures or cancelled (in dollars per share)				44.72
Nonvested, end of period (in dollars per share)				$ 40.32	$ 43.24
Total unrecognized compensation cost related to nonvested shares granted under the Plan				$ 1,100,000
Weighted-average period for recognition (in years)				3 years 10 months 17 days
Total fair value of shares vested				$ 556,000	$ 438,000	$ 432,000
Director
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Increase in annual cash retainer paid					6,000
Annual cash retainer paid to individuals					11,500
Board of Directors Chairman
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Annual cash retainer paid to individuals					19,250
Audit Committee Chairman
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Increase in annual cash retainer paid					2,875
Annual cash retainer paid to individuals					$ 14,375
President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Service period (months)					12 months
Directors and President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of treasury shares reissued to fund stock compensation (in shares)		7,923	8,465
Expense related to stock compensation recognized				$ 318,000	$ 350,000	$ 357,000
Subsequent Event | Directors and President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of treasury shares reissued to fund stock compensation (in shares)	9,291

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans to Related Parties [Roll Forward]
Balance at beginning of year	$ 59,973,000	$ 62,741,000
New loans or additional advances	7,461,000	1,895,000
Effect of changes in composition of related parties	0	4,456,000
Repayments	(11,382,000)	(9,119,000)
Balance at end of year	56,052,000	59,973,000	$ 62,741,000
Deposit liabilities	39,500,000	18,300,000
Rent expense	1,000,000	1,000,000
Rent expense			1,100,000
Legal accruals and settlements	0	0	989,000
Fee income	$ 59,089,000	58,245,000	57,840,000
Minimum
Related Party Transactions [Line Items]
Related party principal ownership threshold (in hundredths)	10.00%
Director
Loans to Related Parties [Roll Forward]
Legal accruals and settlements	$ 0	10,000	28,000
1365 New Scotland Road, Slingerlands, New York | Director
Loans to Related Parties [Roll Forward]
Monthly rent expense	4,000
Rent expense	51,000	52,000
Rent expense			45,000
2 Rush Street, Schenectady, New York | Director
Loans to Related Parties [Roll Forward]
Monthly rent expense	8,000
Rent expense	106,000	93,000
Rent expense			84,000
127 Court Street, Binghamton, New York | Director
Loans to Related Parties [Roll Forward]
Monthly rent expense	$ 5,000
Related party, ownership percentage	20.00%
Participating mortgage loans, income from insurance products (less than $1 thousand)			1,000
Participating mortgage loans, purchase of insurance product			34,000
WMG | Operating Segments | Trust Services | Management
Loans to Related Parties [Roll Forward]
Fee income	$ 614,000	$ 580,000	$ 593,000

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Jun. 15, 2018	Mar. 23, 2016	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Jun. 30, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contingent obligations					$ 16,100
Legal accruals and settlements					$ 0	$ 0	$ 989
Pending Litigation
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contingent obligations				$ 2,300					$ 1,200
Damages sought		$ 4,000
Loss contingency, accrual, noncurrent				850
Legal accruals and settlements				$ 200
Chemung Canal Trust Company
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contingent obligations								$ 2,300
Legal accruals and settlements			$ 1,000
Litigation settlement amount	$ 3,300
Minimum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments period to make fixed-rate commercial draw notes (months)					3 months
Minimum | Fixed Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Interest rate on fixed-rate commitments to make loans					2.63%
Maturity period of fixed-rate commitments to make loans (years)					3 years
Interest rate on fixed-rate commitments to make commercial draw notes (in hundredths)					3.50%
Maximum
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments period to make real estate and home equity loans (days)					60 days
Commitments period to make fixed-rate commercial draw notes (months)					24 months
Off-balance sheet financial instruments, standard term					12 months
Maximum | Fixed Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Interest rate on fixed-rate commitments to make loans					5.50%
Maturity period of fixed-rate commitments to make loans (years)					30 years
Interest rate on fixed-rate commitments to make commercial draw notes (in hundredths)					6.25%
Commitments to make loans | Fixed Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk					$ 28,459	15,560
Commitments to make loans | Variable Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk					39,056	25,233
Unused lines of credit | Fixed Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk					1,300	1,062
Unused lines of credit | Variable Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk					268,075	229,137
Standby letters of credit | Fixed Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk					0	0
Standby letters of credit | Variable Rate
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts of financial instruments with off-balance sheet risk					$ 16,094	$ 16,272

PARENT COMPANY FINANCIAL INFO_3

PARENT COMPANY FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets:
Cash on deposit with subsidiary bank	$ 29,467	$ 25,203
Securities available for sale, at estimated fair value	554,611	284,090
Total assets	2,279,451	1,787,827	$ 1,755,343
Liabilities and shareholders' equity:
Dividends payable	1,214	1,263	1,254
Total liabilities	2,079,752	1,605,200
Shareholders' equity:
Total shareholders' equity	199,699	182,627	165,029	$ 149,813
Total liabilities and shareholders' equity	2,279,451	1,787,827
STATEMENTS OF INCOME [Abstract]
Income before income tax expense	23,869	19,043	23,635
Income tax benefit	4,607	3,434	4,009
Net of tax	19,262	15,609	19,626
Cash flows from operating activities:
Net income	19,262	15,609	19,626
Adjustments to reconcile net income to net cash provided by operating activities:
Change in other assets	(9,883)	(1,945)	(2,651)
Change in other liabilities	8,265	3,333	(654)
Net cash provided by operating activities	28,659	26,405	27,772
Cash flow from financing activities:
Cash dividends paid	(5,006)	(5,029)	(4,969)
Purchase of treasury stock	(7,589)	0	0
Sale of treasury stock	1,018	585	643
Net cash (used in) provided by financing activities	453,823	(1,762)	27,552
Cash and cash equivalents, beginning of period	121,904
Cash and cash equivalents, end of period	108,538	121,904
Parent Company
Assets:
Cash on deposit with subsidiary bank	2,243	3,938
Dividends receivable from subsidiary bank	1,214	0
Securities available for sale, at estimated fair value	377	492
Other assets	1,420	1,266
Total assets	201,057	183,988
Liabilities and shareholders' equity:
Dividends payable	1,214	1,263
Other liabilities	144	98
Total liabilities	1,358	1,361
Shareholders' equity:
Total shareholders' equity	199,699	182,627
Total liabilities and shareholders' equity	201,057	183,988
STATEMENTS OF INCOME [Abstract]
Dividends from subsidiary bank and non-bank	10,806	4,516	3,187
Interest and dividend income	5	9	10
Non-interest income	(50)	(62)	(20)
Non-interest expenses	503	439	477
Income before impact of subsidiaries' undistributed earnings	10,258	4,024	2,700
Income before income tax expense	19,080	15,445	19,462
Income tax benefit	(182)	(164)	(164)
Net of tax	19,262	15,609	19,626
Cash flows from operating activities:
Net income	19,262	15,609	19,626
Adjustments to reconcile net income to net cash provided by operating activities:
Change in dividend receivable	(1,214)	0	1,233
Change in other assets	(154)	(196)	(32)
Change in other liabilities	6	(48)	773
Expense related to employee stock compensation	101	100	89
Expense related to restricted stock units for directors' deferred compensation plan	29	42	67
Expense to employee restricted stock awards	672	503	405
Net cash provided by operating activities	9,880	4,589	5,399
Cash flow from financing activities:
Cash dividends paid	(5,006)	(5,029)	(4,969)
Purchase of treasury stock	(7,589)	(185)	(112)
Sale of treasury stock	1,018	585	643
Net cash (used in) provided by financing activities	(11,577)	(4,629)	(4,438)
Net increase (decrease) in cash and cash equivalents	(1,697)	(40)	961
Cash and cash equivalents, beginning of period	3,938	3,978	3,017
Cash and cash equivalents, end of period	2,241	3,938	3,978
Parent Company | Chemung Canal Trust Company
Assets:
Investment in subsidiary	192,364	175,470
STATEMENTS OF INCOME [Abstract]
Income (loss) from equity method investments	8,204	11,220	16,670
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings	(8,204)	(11,220)	(16,670)
Parent Company | CFS Group Inc.
Assets:
Investment in subsidiary	876	868
STATEMENTS OF INCOME [Abstract]
Income (loss) from equity method investments	8	(4)	(32)
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings	(8)	4	32
Parent Company | Chemung Risk Management
Assets:
Investment in subsidiary	2,563	1,954
STATEMENTS OF INCOME [Abstract]
Income (loss) from equity method investments	610	205	124
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings	$ (610)	$ (205)	$ (124)

FAIR VALUES (Details)

FAIR VALUES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financial Assets [Abstract]
Total	$ 554,611	$ 284,090
Provision for loan losses	(4,239)	(5,945)	$ (3,153)
Recurring
Financial Assets [Abstract]
Mortgage-backed securities, residential	467,866	225,234
Obligations of states and political subdivisions	43,405	42,845
Corporate bonds and notes	9,035	250
SBA loan pools	34,305	15,761
Total	554,611	284,090
Equity Investments	1,880	1,442
Derivative assets	14,702	6,466
Derivative liabilities	15,059	6,831
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets [Abstract]
Mortgage-backed securities, residential	0	0
Obligations of states and political subdivisions	0	0
Corporate bonds and notes	0	0
SBA loan pools	0	0
Total	0	0
Equity Investments	1,880	1,442
Derivative assets	0	0
Derivative liabilities	0	0
Recurring | Significant Other Observable Inputs (Level 2)
Financial Assets [Abstract]
Mortgage-backed securities, residential	467,866	225,234
Obligations of states and political subdivisions	43,405	42,845
Corporate bonds and notes	9,035	250
SBA loan pools	34,305	15,761
Total	554,611	284,090
Equity Investments	0	0
Derivative assets	14,702	6,466
Derivative liabilities	14,702	6,466
Recurring | Significant Unobservable Inputs (Level 3)
Financial Assets [Abstract]
Mortgage-backed securities, residential	0	0
Obligations of states and political subdivisions	0	0
Corporate bonds and notes	0	0
SBA loan pools	0	0
Total	0	0
Equity Investments	0	0
Derivative assets	0	0
Derivative liabilities	357	365
Non-recurring | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	1,554
Provision for loan losses	0	(1,597)
Non-recurring | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	237	517
Provision for loan losses	0	(12)
Non-recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	0
Non-recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	0	0
Non-recurring | Significant Other Observable Inputs (Level 2) | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	0
Non-recurring | Significant Other Observable Inputs (Level 2) | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	0	0
Non-recurring | Significant Unobservable Inputs (Level 3) | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	1,554
Non-recurring | Significant Unobservable Inputs (Level 3) | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	237	517
Commercial mortgages | Non-recurring | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	111	111
Provision for loan losses	0	0
Commercial mortgages | Non-recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	0
Commercial mortgages | Non-recurring | Significant Other Observable Inputs (Level 2) | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	0
Commercial mortgages | Non-recurring | Significant Unobservable Inputs (Level 3) | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	111	111
Residential Mortgages | Non-recurring | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	126	284
Provision for loan losses	0	(12)
Residential Mortgages | Non-recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	0	0
Residential Mortgages | Non-recurring | Significant Other Observable Inputs (Level 2) | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	0	0
Residential Mortgages | Non-recurring | Significant Unobservable Inputs (Level 3) | Other Real Estate Owned
Financial Assets [Abstract]
Other real estate, foreclosed assets, and repossessed assets	126	284
Commercial mortgages | Commercial mortgages: | Non-recurring | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	1,554
Provision for loan losses	0	(1,597)
Commercial mortgages | Commercial mortgages: | Non-recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	0
Commercial mortgages | Commercial mortgages: | Non-recurring | Significant Other Observable Inputs (Level 2) | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	0	0
Commercial mortgages | Commercial mortgages: | Non-recurring | Significant Unobservable Inputs (Level 3) | Impaired Loans
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net	$ 0	1,554
Home equity lines and loans | Consumer Loans | Non-recurring | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net		122
Provision for loan losses		0
Home equity lines and loans | Consumer Loans | Non-recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net		0
Home equity lines and loans | Consumer Loans | Non-recurring | Significant Other Observable Inputs (Level 2) | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net		0
Home equity lines and loans | Consumer Loans | Non-recurring | Significant Unobservable Inputs (Level 3) | Other Real Estate Owned
Financial Assets [Abstract]
Total impaired loans/ other real estate owned, net		$ 122

FAIR VALUES - Unobservable Inpu

FAIR VALUES - Unobservable Input Reconciliation (Details) - Derivative liabilities - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance of recurring Level 3 assets at January 1	$ (365)	$ (140)
Derivative instruments entered into	(52)	(43)
Included in earnings - other non-interest income	60	(182)
Balance of recurring Level 3 assets at December 31	$ (357)	$ (365)

FAIR VALUES - Quantitative Info

FAIR VALUES - Quantitative Information (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Liabilities, fair value, recurring	$ 357	$ 365
Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring		1,554
Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 237	$ 517
Residential Mortgage | Minimum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Residential Mortgage | Maximum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	35.29%
Residential Mortgage | Weighted Average | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	24.09%
Sales Comparison | Commercial mortgages | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring		$ 1,554
Sales Comparison | Commercial mortgages | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 111	$ 111
Sales Comparison | Commercial mortgages | Minimum | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value		10.00%
Sales Comparison | Commercial mortgages | Minimum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Sales Comparison | Commercial mortgages | Maximum | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value		10.00%
Sales Comparison | Commercial mortgages | Maximum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Sales Comparison | Commercial mortgages | Weighted Average | Non-recurring | Impaired Loans
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value		10.00%
Sales Comparison | Commercial mortgages | Weighted Average | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value	20.80%	20.80%
Sales Comparison | Residential Mortgage | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring	$ 126	$ 284
Sales Comparison | Home equity lines and loans | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, fair value, recurring		$ 122
Sales Comparison | Home equity lines and loans | Minimum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value		20.80%
Sales Comparison | Home equity lines and loans | Maximum | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value		20.80%
Sales Comparison | Home equity lines and loans | Weighted Average | Non-recurring | OREO
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair value inputs, discount to appraised value		20.80%
Measurement Input, Discount Rate | Minimum | Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	0.0093	0.0730
Measurement Input, Discount Rate | Maximum | Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	0.2778	0.0730
Measurement Input, Discount Rate | Weighted Average | Recurring | Derivative liabilities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Discount rate	0.0227	0.0730

FAIR VALUES - Carrying Amounts

FAIR VALUES - Carrying Amounts and Estimated Fair Values of Other Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Cash and due from financial institutions	$ 29,467	$ 25,203
Interest-earning deposits in other financial institutions	79,071	96,701
Securities available for sale	554,611	284,090
Securities held to maturity	2,469	3,115
Loans, net and loans held for sale	1,515,539	1,285,741
Accrued interest receivable	5,035	3,684
Deposits:
Time deposits	285,731	161,176
Carrying Amount
Financial assets:
Cash and due from financial institutions	29,467	25,203
Interest-earning deposits in other financial institutions	79,071	96,701
Equity investments	2,542	2,174
Securities available for sale	554,611	284,090
Securities held to maturity	2,469	3,115
FHLBNY and FRBNY stock	3,150	3,099
Loans, net and loans held for sale	1,515,709	1,286,926
Accrued interest receivable	6,271	4,633
Derivative assets	14,702	6,466
Deposits:
Demand, savings, and insured money market accounts	1,752,043	1,410,962
Time deposits	285,731	161,176
Accrued interest payable	262	299
Derivative liabilities	15,059	6,831
Estimated Fair Value
Financial assets:
Cash and due from financial institutions	29,467	25,203
Interest-earning deposits in other financial institutions	79,071	96,701
Equity investments	2,542	2,174
Securities available for sale	554,611	284,090
Securities held to maturity	2,501	3,139
Loans, net and loans held for sale	1,514,318	1,285,215
Accrued interest receivable	6,271	4,633
Derivative assets	14,702	6,466
Deposits:
Demand, savings, and insured money market accounts	1,752,043	1,410,962
Time deposits	288,398	163,761
Accrued interest payable	262	299
Derivative liabilities	15,059	6,831
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and due from financial institutions	29,467	25,203
Interest-earning deposits in other financial institutions	79,071	96,701
Equity investments	2,542	2,174
Securities available for sale	0	0
Securities held to maturity	0	0
FHLBNY and FRBNY stock	0	0
Loans, net and loans held for sale	0	0
Accrued interest receivable	0	63
Derivative assets	0	0
Deposits:
Demand, savings, and insured money market accounts	1,752,043	1,410,962
Time deposits	0	0
Accrued interest payable	11	27
Derivative liabilities	0	0
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and due from financial institutions	0	0
Interest-earning deposits in other financial institutions	0	0
Equity investments	0	0
Securities available for sale	554,611	284,090
Securities held to maturity	2,175	2,094
FHLBNY and FRBNY stock	0	0
Loans, net and loans held for sale	0	0
Accrued interest receivable	1,356	885
Derivative assets	14,702	6,466
Deposits:
Demand, savings, and insured money market accounts	0	0
Time deposits	288,398	163,761
Accrued interest payable	251	272
Derivative liabilities		6,466
Estimated Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and due from financial institutions	0	0
Interest-earning deposits in other financial institutions	0	0
Equity investments	0	0
Securities available for sale	0	0
Securities held to maturity	326	1,045
FHLBNY and FRBNY stock	0	0
Loans, net and loans held for sale	1,514,318	1,285,215
Accrued interest receivable	4,915	3,685
Derivative assets	0	0
Deposits:
Demand, savings, and insured money market accounts	0	0
Time deposits	0	0
Accrued interest payable	$ 0	0
Derivative liabilities		$ 365

REGULATORY CAPITAL REQUIREMEN_3

REGULATORY CAPITAL REQUIREMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Net profits period for accessing dividends declarable (years)	2 years
Declarable dividends without prior approval for next fiscal year	$ 36,100
Actual	192,960	$ 182,239
Tier 1 Capital (to Risk Weighted Assets):
Actual	175,216	165,859
Common Equity Tier 1 Capital (to Risk Weighted Assets):
Actual	175,216	165,859
Tier 1 Capital (to Average Assets):
Actual	$ 175,216	$ 165,859
Total Capital (to Risk Weighted Assets):
Capital to Risk Weighted Assets	13.62%	13.98%
Tier One Risk Based Capital to Risk Weighted Assets	12.37%	12.73%
Common Equity Tier 1 Capital to Risk Weighted Assets	12.37%	12.73%
Leverage Ratios [Abstract]
Tier One Leverage Capital to Average Assets (in hundredths)	7.90%	9.35%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual	$ 185,606	$ 175,062
Minimal Capital Adequacy	113,182	104,136
Minimal Capital Adequacy with Capital Buffer	148,551	136,679
To Be Well Capitalized Under Prompt Corrective Action Provisions	141,478	130,170
Tier 1 Capital (to Risk Weighted Assets):
Actual	167,881	158,702
Minimal Capital Adequacy	84,887	78,102
Minimal Capital Adequacy with Capital Buffer	120,256	110,645
To Be Well Capitalized Under Prompt Corrective Action Provisions	113,182	104,136
Common Equity Tier 1 Capital (to Risk Weighted Assets):
Actual	167,881	158,702
Minimal Capital Adequacy	63,665	58,577
Minimal Capital Adequacy with Capital Buffer	99,034	91,119
To Be Well Capitalized Under Prompt Corrective Action Provisions	91,960	84,611
Tier 1 Capital (to Average Assets):
Actual	167,881	158,702
Minimal Capital Adequacy	88,474	70,719
To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 110,592	$ 88,399
Total Capital (to Risk Weighted Assets):
Capital to Risk Weighted Assets	13.12%	13.45%
Capital Required To Be Adequately Capitalized to Risk Weighted Assets	8.00%	8.00%
Capital Required for Capital Adequacy with Capital Buffer to Risk Weighted Assets	10.50%	10.50%
Capital Required To Be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Risk Based Capital to Risk Weighted Assets	11.87%	12.19%
Tier One Risk Based Capital Required To Be Adequately Capitalized to Risk Weighted Assets	6.00%	6.00%
Tier One Risk Based Capital Required for Capital Adequacy With Capital Buffer to Risk Weighted Assets	8.50%	8.50%
Tier One Risk Based Capital Required To Be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Common Equity Tier 1 Capital to Risk Weighted Assets	11.87%	12.19%
Common Equity Tier 1 Capital Required to be Adequately Capitalized to Risk Weighted Assets	4.50%	4.50%
Common Equity Tier One Risk Based Capital Requirement for Capital Adequacy with Capital Buffer to Risk Weighted Assets	7.00%	7.00%
Common Equity Tier 1 Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Leverage Ratios [Abstract]
Tier One Leverage Capital to Average Assets (in hundredths)	7.59%	8.98%
Tier One Leverage Capital Required To Be Adequately Capitalized to Average Assets (in hundredths)	4.00%	4.00%
Tier One Leverage Capital Required To Be Well Capitalized to Average Assets (in hundredths)	5.00%	5.00%

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance	$ 182,627	$ 165,029	$ 149,813
Other comprehensive income before reclassification	8,136	5,561	(1,559)
Amounts reclassified from accumulated other comprehensive income (loss)	64	51	690
Total other comprehensive income (loss)	8,200	5,612	(869)
Ending balance	199,699	182,627	165,029
Realized gains on securities available for sale	0	19	0
Income tax expense	4,607	3,434	4,009
Pension and other employee benefits	5,553	5,902	5,524
Net of tax	19,262	15,609	19,626
Cumulative Effect, Period of Adoption, Adjusted Balance
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			149,651
Reclassification out of Accumulated Other Comprehensive Income (loss)
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Net of tax	65	51	690
Total
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance	(5,799)	(11,411)	(10,340)
Total other comprehensive income (loss)	8,200	5,612	(869)
Ending balance	2,401	(5,799)	(11,411)
Total | Cumulative Effect, Period of Adoption, Adjustment
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			(202)
Total | Cumulative Effect, Period of Adoption, Adjusted Balance
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			(10,542)
Total | Reclassification out of Accumulated Other Comprehensive Income (loss)
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Net of tax	0	(14)	0
Unrealized Gains and Losses on Securities Available for Sale
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance	1,368	(4,646)	(3,415)
Other comprehensive income before reclassification	7,759	6,028	(1,029)
Amounts reclassified from accumulated other comprehensive income (loss)	0	(14)	0
Total other comprehensive income (loss)	7,759	6,014	(1,029)
Ending balance	9,127	1,368	(4,646)
Unrealized Gains and Losses on Securities Available for Sale | Cumulative Effect, Period of Adoption, Adjustment
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			(202)
Unrealized Gains and Losses on Securities Available for Sale | Cumulative Effect, Period of Adoption, Adjusted Balance
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			(3,617)
Unrealized Gains and Losses on Securities Available for Sale | Reclassification out of Accumulated Other Comprehensive Income (loss)
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Realized gains on securities available for sale	0	(19)	0
Income tax expense	0	5	0
Defined Benefit and Other Benefit Plans
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance	(7,167)	(6,765)	(6,925)
Other comprehensive income before reclassification	377	(467)	(530)
Amounts reclassified from accumulated other comprehensive income (loss)	64	65	690
Total other comprehensive income (loss)	441	(402)	160
Ending balance	(6,726)	(7,167)	(6,765)
Defined Benefit and Other Benefit Plans | Cumulative Effect, Period of Adoption, Adjustment
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			0
Defined Benefit and Other Benefit Plans | Cumulative Effect, Period of Adoption, Adjusted Balance
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Beginning balance			(6,925)
Defined Benefit and Other Benefit Plans | Reclassification out of Accumulated Other Comprehensive Income (loss)
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Income tax expense	(15)	(27)	(236)
Net of tax	65	65	690
Net Prior Service Cost (Credit) | Reclassification out of Accumulated Other Comprehensive Income (loss)
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Pension and other employee benefits	(220)	(220)	(220)
Net Unamortized Gain (Loss) | Reclassification out of Accumulated Other Comprehensive Income (loss)
Summary of changes in accumulated other comprehensive income or loss by component, net of tax [Roll Forward]
Pension and other employee benefits	$ 300	$ 312	$ 1,146

SEGMENT REPORTING (Details)

SEGMENT REPORTING (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)segment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of primary business segment | segment	2
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income	$ 66,907	$ 66,932	$ 64,553
Interest expense	3,988	6,321	4,073
Net interest income	62,919	60,611	60,480
Provision for loan losses	4,239	5,945	3,153
Net interest income after provision for loan losses	58,680	54,666	57,327
Total non-interest income	21,124	20,073	23,074
Non-interest expenses	55,935	55,696	56,766
Income before income tax expense	23,869	19,043	23,635
Income tax benefit	4,607	3,434	4,009
Net income	19,262	15,609	19,626
Segment assets	2,279,451	1,787,827	1,755,343
Core Banking
Reportable segments and reconciliation to consolidated results [Abstract]
Total non-interest income	10,982	10,356	13,596
Operating Segments | Core Banking
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income	66,849	66,868	64,511
Interest expense	3,988	6,321	4,073
Net interest income	62,861	60,547	60,438
Provision for loan losses	4,239	5,945	3,153
Net interest income after provision for loan losses	58,622	54,602	57,285
Total non-interest income	10,982	10,356	13,597
Non-interest expenses	48,479	48,213	49,650
Income before income tax expense	21,125	16,745	21,232
Income tax benefit	3,952	2,778	3,329
Net income	17,173	13,967	17,903
Segment assets	2,271,923	1,780,401	1,747,208
Operating Segments | WMG
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income	0	0	0
Interest expense	0	0	0
Net interest income	0	0	0
Provision for loan losses	0	0	0
Net interest income after provision for loan losses	0	0	0
Total non-interest income	9,492	9,503	9,317
Non-interest expenses	6,283	6,326	5,997
Income before income tax expense	3,209	3,177	3,320
Income tax benefit	824	810	847
Net income	2,385	2,367	2,473
Segment assets	3,231	3,345	3,606
Intersegment Eliminations
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income	58	64	42
Interest expense	0	0	0
Net interest income	58	64	42
Provision for loan losses	0	0	0
Net interest income after provision for loan losses	58	64	42
Total non-interest income	650	214	160
Non-interest expenses	1,173	1,157	1,119
Income before income tax expense	(465)	(879)	(917)
Income tax benefit	(169)	(154)	(167)
Net income	(296)	(725)	(750)
Segment assets	$ 4,297	$ 4,082	$ 4,529