Citizens & Northern (CZNC) 10-K 5 Mar 21 2020 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 03, 2021	Jun. 30, 2020
Document And Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	0-16084
Entity Registrant Name	CITIZENS & NORTHERN CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2451943
Entity Address, Address Line One	90-92 MAIN STREET
Entity Address, City or Town	WELLSBORO
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	16901
City Area Code	570
Local Phone Number	724-3411
Title of 12(b) Security	Common Stock Par Value $1.00
Trading Symbol	CZNC
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
Entity Shell Company	false
ICFR Auditor Attestation Flag	true
Entity Common Stock, Shares Outstanding (in shares)		16,000,948
Entity Public Float			$ 274,805,802
Entity Central Index Key	0000810958
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Current Fiscal Year End Date	--12-31

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Noninterest-bearing	$ 24,780,000	$ 17,667,000
Interest-bearing	77,077,000	17,535,000
Total cash and due from banks	101,857,000	35,202,000
Available-for-sale debt securities, at fair value	349,332,000	346,723,000
Marketable equity security	1,000,000	979,000
Loans held for sale	942,000	767,000
Loans receivable	1,644,209,000	1,182,222,000
Allowance for loan losses	(11,385,000)	(9,836,000)
Loans, net	1,632,824,000	1,172,386,000
Bank-owned life insurance	30,096,000	18,641,000
Accrued interest receivable	8,293,000	5,001,000
Bank premises and equipment, net	21,526,000	17,170,000
Foreclosed assets held for sale	1,338,000	2,886,000
Deferred tax asset, net	2,705,000	2,618,000
Goodwill	52,505,000	28,388,000
Core deposit intangibles, net	3,851,000	1,247,000
Other assets	32,831,000	22,137,000
TOTAL ASSETS	2,239,100,000	1,654,145,000
LIABILITIES
Noninterest-bearing	465,332,000	285,904,000
Interest-bearing	1,355,137,000	966,756,000
Total deposits	1,820,469,000	1,252,660,000
Short-term borrowings	20,022,000	86,220,000
Long-term borrowings	54,608,000	52,127,000
Subordinated debt	16,553,000	6,500,000
Accrued interest and other liabilities	27,692,000	12,186,000
TOTAL LIABILITIES	1,939,344,000	1,409,693,000
STOCKHOLDERS' EQUITY
Preferred stock, $1,000 par value; authorized 30,000 shares; $1,000 liquidation preference per share; no shares issued	0	0
Common stock, par value $1.00 per share; authorized 20,000,000 shares; issued 15,982,815 and outstanding 15,911,984 at December 31, 2020; issued 13,934,996 and outstanding 13,716,445 at December 31, 2019	15,983,000	13,935,000
Paid-in capital	143,644,000	104,519,000
Retained earnings	129,703,000	126,480,000
Treasury stock, at cost; 70,831 shares at December 31, 2020 and 218,551 shares at December 31, 2019	(1,369,000)	(4,173,000)
Accumulated other comprehensive income	11,795,000	3,691,000
TOTAL STOCKHOLDERS' EQUITY	299,756,000	244,452,000
TOTAL LIABILITIES & STOCKHOLDERS' EQUITY	$ 2,239,100,000	$ 1,654,145,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED BALANCE SHEETS
Preferred stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, authorized shares (in shares)	30,000	30,000
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	15,982,815	13,934,996
Common stock, shares outstanding (in shares)	15,911,984	13,716,445
Treasury stock, shares (in shares)	70,831	218,551

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest and fees on loans:
Taxable	$ 67,384,000	$ 53,086,000
Tax-exempt	1,768,000	2,104,000
Interest on mortgages held for sale	62,000	22,000
Interest on balances with depository institutions	251,000	514,000
Income from available-for-sale debt securities:
Taxable	5,534,000	7,008,000
Tax-exempt	2,143,000	2,014,000
Dividends on marketable equity security	18,000	23,000
Total interest and dividend income	77,160,000	64,771,000
INTEREST EXPENSE
Interest on deposits	7,231,000	8,190,000
Interest on short-term borrowings	367,000	733,000
Interest on long-term borrowings	1,291,000	1,013,000
Interest on subordinated debt	706,000	347,000
Total interest expense	9,595,000	10,283,000
Net interest income	67,565,000	54,488,000
Provision for loan losses	3,913,000	849,000
Net interest income after provision for loan losses	63,652,000	53,639,000
NONINTEREST INCOME
Brokerage revenue	1,343,000	1,266,000
Insurance commissions, fees and premiums	184,000	167,000
Net gains from sale of loans	5,403,000	924,000
Increase in cash surrender value of life insurance	515,000	402,000
Other noninterest income	3,010,000	1,875,000
Sub-total	24,344,000	19,284,000
Realized gains on available-for-sale debt securities, net	169,000	23,000
Total noninterest income	24,513,000	19,307,000
NONINTEREST EXPENSE
Salaries and wages	25,599,000	20,644,000
Pensions and other employee benefits	7,463,000	5,837,000
Occupancy expense, net	3,010,000	2,629,000
Furniture and equipment expense	1,451,000	1,289,000
Data processing expenses	4,453,000	3,403,000
Automated teller machine and interchange expense	1,231,000	1,103,000
Pennsylvania shares tax	1,689,000	1,380,000
Professional fees	1,692,000	1,069,000
Telecommunications	863,000	744,000
Directors' fees	730,000	673,000
Loss on prepayment of borrowings	1,636,000	0
Merger-related expenses	7,708,000	4,099,000
Other noninterest expense	7,428,000	6,667,000
Total noninterest expense	64,953,000	49,537,000
Income before income tax provision	23,212,000	23,409,000
Income tax provision	3,990,000	3,905,000
NET INCOME	$ 19,222,000	$ 19,504,000
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 1.30	$ 1.46
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	$ 1.30	$ 1.46
Trust and Asset Management
NONINTEREST INCOME
Revenue	$ 6,321,000	$ 6,106,000
Deposit Account
NONINTEREST INCOME
Revenue	4,231,000	5,358,000
Service Charges and Fees
NONINTEREST INCOME
Revenue	304,000	332,000
Debit Card
NONINTEREST INCOME
Revenue	3,094,000	2,754,000
Bank Servicing
NONINTEREST INCOME
Revenue	$ (61,000)	$ 100,000

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Comprehensive Income
Net income	$ 19,222	$ 19,504
Unrealized holding gains on available-for-sale debt securities	10,504	9,920
Reclassification adjustment for gains realized in income	(169)	(23)
Other comprehensive income on available-for-sale debt securities	10,335	9,897
Changes from plan amendments and actuarial gains and losses	(49)	87
Amortization of prior service cost and net actuarial loss included in net periodic benefit cost	(29)	(32)
Other comprehensive (loss) income on unfunded retirement obligations	(78)	55
Other comprehensive income before income tax	10,257	9,952
Income tax related to other comprehensive income	(2,153)	(2,091)
Net other comprehensive income	8,104	7,861
Comprehensive income	$ 27,326	$ 27,365

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Total
Balance (in shares) at Dec. 31, 2018	12,655,171	335,841
Balance at Dec. 31, 2018	$ 12,655	$ (6,362)	$ 72,602	$ 122,643	$ (4,170)	$ 197,368
Net income				19,504		19,504
Other comprehensive income, net					7,861	7,861
Cash dividends declared on common stock				(15,667)		(15,667)
Shares issued for dividend reinvestment plan (in shares)		(62,232)
Shares issued for dividend reinvestment plan		$ 1,187	439			$ 1,626
Shares issued from treasury and redeemed related to exercise of stock options (in shares)		(18,071)				(31,304)
Shares issued from treasury and redeemed related to exercise of stock options		$ 344	(146)			$ 198
Restricted stock granted (in shares)		(48,137)
Restricted stock granted		$ 918	(918)			0
Forfeiture of restricted stock (in shares)		3,758
Forfeiture of restricted stock		$ (71)	71			0
Stock-based compensation expense			798			798
Purchase of restricted stock for tax withholding (in shares)		7,392
Purchase of restricted stock for tax withholding		$ (189)				(189)
Shares issued for acquisition of equity issuance costs (in shares)	1,279,825
Shares issued for acquisition of equity issuance costs	$ 1,280		31,673			32,953
Balance (in shares) at Dec. 31, 2019	13,934,996	218,551
Balance at Dec. 31, 2019	$ 13,935	$ (4,173)	104,519	126,480	3,691	244,452
Net income				19,222		19,222
Other comprehensive income, net					8,104	8,104
Cash dividends declared on common stock				(15,999)		(15,999)
Shares issued for dividend reinvestment plan (in shares)		(77,525)
Shares issued for dividend reinvestment plan		$ 1,496	34			$ 1,530
Shares issued from treasury and redeemed related to exercise of stock options (in shares)		(10,407)				(17,222)
Shares issued from treasury and redeemed related to exercise of stock options		$ 201	(70)			$ 131
Restricted stock granted (in shares)		(70,940)
Restricted stock granted		$ 1,370	(1,370)			0
Forfeiture of restricted stock (in shares)		5,290
Forfeiture of restricted stock		$ (100)	100			0
Stock-based compensation expense			1,050			1,050
Purchase of restricted stock for tax withholding (in shares)		5,862
Purchase of restricted stock for tax withholding		$ (163)				(163)
Shares issued for acquisition of equity issuance costs (in shares)	2,047,819
Shares issued for acquisition of equity issuance costs	$ 2,048		39,381			41,429
Balance (in shares) at Dec. 31, 2020	15,982,815	70,831
Balance at Dec. 31, 2020	$ 15,983	$ (1,369)	$ 143,644	$ 129,703	$ 11,795	$ 299,756

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Retained Earnings
Common stock, dividends, per share (in dollars per share)	$ 1.08	$ 1.18

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 19,222,000	$ 19,504,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	3,913,000	849,000
Loss on prepayment of borrowings	1,636,000	0
Realized gains on available-for-sale debt securities, net	(169,000)	(23,000)
Net amortization of securities	1,570,000	1,341,000
Increase in cash surrender value of life insurance	(515,000)	(402,000)
Depreciation and amortization of bank premises and equipment	1,981,000	1,749,000
Net accretion of purchase accounting adjustments	(2,524,000)	(375,000)
Stock-based compensation	1,050,000	798,000
Deferred income taxes	(361,000)	172,000
Decrease in fair value of servicing rights	576,000	331,000
Gains on sales of loans, net	(5,403,000)	(924,000)
Origination of loans held for sale	(158,909,000)	(29,978,000)
Proceeds from sales of loans held for sale	163,149,000	30,144,000
(Increase) decrease in accrued interest receivable and other assets	(2,645,000)	1,188,000
Increase (decrease) in accrued interest payable and other liabilities	2,473,000	(2,068,000)
Other	(260,000)	155,000
Net Cash Provided by Operating Activities	24,784,000	22,461,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash and cash equivalents provided by (used in) business combination	75,955,000	(1,778,000)
Proceeds from maturities of certificates of deposit	740,000	580,000
Purchase of certificates of deposit	(2,500,000)	0
Proceeds from sales of available-for-sale debt securities	28,941,000	96,148,000
Proceeds from calls and maturities of available-for-sale debt securities	94,486,000	81,204,000
Purchase of available-for-sale debt securities	(105,354,000)	(57,655,000)
Redemption of Federal Home Loan Bank of Pittsburgh stock	8,496,000	10,137,000
Purchase of Federal Home Loan Bank of Pittsburgh stock	(5,146,000)	(9,208,000)
Net decrease (increase) in loans	1,564,000	(96,628,000)
Proceeds from bank owned life insurance	0	796,000
Purchase of premises and equipment	(3,137,000)	(2,870,000)
Proceeds from sale of foreclosed assets	2,262,000	1,768,000
Other	273,000	174,000
Net Cash Provided by Investing Activities	96,580,000	22,668,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in deposits	86,941,000	(4,822,000)
Net decrease in short-term borrowings	(99,969,000)	(38,307,000)
Proceeds from long-term borrowings	25,891,000	48,500,000
Repayments of long-term borrowings and subordinated debt	(54,831,000)	(38,173,000)
Sale of treasury stock	131,000	198,000
Purchase of vested restricted stock for tax withholding	(163,000)	(189,000)
Common dividends paid	(14,469,000)	(14,041,000)
Net Cash Used in Financing Activities	(56,469,000)	(46,834,000)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	64,895,000	(1,705,000)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	31,122,000	32,827,000
CASH AND CASH EQUIVALENTS, END OF YEAR	96,017,000	31,122,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Right-of-use assets recognized at adoption of ASU 2016-02	0	1,132,000
Leased assets obtained in exchange for new operating lease liabilities	167,000	745,000
Accrued purchase of available-for-sale securities	994,000	0
Accrued income from life insurance claim	279,000	0
Assets acquired through foreclosure of real estate loans	0	2,053,000
Interest paid	10,742,000	9,601,000
Income taxes paid	$ 3,137,000	$ 3,234,000

NATURE OF OPERATIONS AND SUMMAR

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2020
NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF CONSOLIDATION – NATURE OF OPERATIONS – The Corporation provides wealth management services through its trust department, including administration of trusts and estates, retirement plans, and other employee benefit plans, and investment management services. The Corporation offers a variety of personal and commercial insurance products through C&N Financial Services Corporation. C&N Financial Services Corporation also offers mutual funds, annuities, educational savings accounts and other investment products through registered agents. Management has determined that the Corporation has one reportable segment, “Community Banking.” All of the Corporation’s activities are interrelated, and each activity is dependent and assessed based on how each of the activities of the Corporation supports the others. The Corporation is subject to competition from other financial institutions. It is also subject to regulation by certain federal and state agencies and undergoes periodic examination by those regulatory authorities. As a consequence, the Corporation’s business is particularly susceptible to being affected by future federal and state legislation and regulations. USE OF ESTIMATES – Material estimates that are particularly susceptible to change include: (1) the allowance for loan losses, (2) fair values of debt securities based on estimates from independent valuation services or from brokers and (3) assessment of goodwill for possible impairment. INVESTMENT SECURITIES – Available-for-sale debt securities – Other-than-temporary impairment – management considers (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, (3) the intent and ability of the Corporation to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value, and (4) whether the Corporation intends to sell the security or if it is more likely than not that the Corporation will be required to sell the security before the recovery of its amortized cost basis. The credit-related impairment is recognized in earnings and is the difference between a security’s amortized cost basis and the present value of expected future cash flows discounted at the security’s effective interest rate. For debt securities classified as held-to-maturity, if any, the amount of noncredit-related impairment is recognized in other comprehensive income and accreted over the remaining life of the debt security as an increase in the carrying value of the security. Marketable equity security Restricted equity securities DERIVATIVES – LOANS HELD FOR SALE – LOANS RECEIVABLE – The loans receivable portfolio is segmented into residential mortgage, commercial and consumer loans. The residential mortgage segment includes the following classes: first and junior lien residential mortgages, home equity lines of credit and residential construction loans. The most significant classes of commercial loans are commercial loans secured by real estate, non-real estate secured commercial and industrial loans, loans to political subdivisions, commercial construction, multi-family residential and loans secured by farmland. Loans are placed on nonaccrual status for all classes of loans when, in the opinion of management, collection of interest is doubtful. Any unpaid interest previously accrued on those loans is reversed from income. Interest income is not recognized on specific impaired loans unless the likelihood of further loss is remote. Interest payments received on loans for which the risk of further loss is greater than remote are applied as a reduction of the loan principal balance. Interest income on other nonaccrual loans is recognized only to the extent of interest payments received. Generally, loans are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual principal and interest is no longer in doubt. The past due status of all classes of loans receivable is determined based on contractual due dates for loan payments. Also, the amortization of deferred loan fees is discontinued when a loan is placed on nonaccrual status. PURCHASED LOANS – The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable yield. The nonaccretable yield represents estimated future credit losses expected to be incurred over the life of the loan. Subsequent decreases to the expected cash flows require us to evaluate the need for an allowance for credit losses. Subsequent improvements in expected cash flows result in the reversal of a corresponding amount of the nonaccretable yield which we then reclassify as accretable yield that is recognized into interest income over the remaining life of the loan using the interest method. Our evaluation of the amount of future cash flows that we expect to collect is performed in a similar manner as that used to determine our allowance for credit losses. Charge-offs of the principal amount on acquired loans would be first applied to the nonaccretable yield portion of the fair value adjustment. ALLOWANCE FOR LOAN LOSSES – The allowance for loan losses is maintained at a level considered adequate to provide for losses that can be reasonably anticipated. Management performs a quarterly evaluation of the adequacy of the allowance. The allowance is based on the Corporation’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Corporation’s allowance for loan losses. Such agencies may require the Corporation to recognize adjustments to the allowance based on their judgments of information available to them at the time of their examination. In the process of evaluating the loan portfolio, management also considers the Corporation’s exposure to losses from unfunded loan commitments. As of December 31, 2020 and 2019, management determined that no allowance for credit losses related to unfunded loan commitments was required. The allowance consists primarily of two major components – (1) a specific component based on a detailed assessment of certain larger loan relationships, mainly commercial purpose, determined on a loan-by-loan basis; and (2) a general component for the remainder of the portfolio based on a collective evaluation of pools of loans with similar risk characteristics. The general component is assigned to each pool of loans based on both historical net charge-off experience, and an evaluation of certain qualitative factors. An unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the above methodologies for estimating specific and general losses in the portfolio. The specific component relates to loans that are classified as impaired based on a detailed assessment of certain larger loan relationships evaluated by a management committee referred to as the Watch List Committee. Specific loan relationships are identified for evaluation based on the related credit risk rating. For individual loans classified as impaired, an allowance is established when the collateral value less estimated selling costs, present value of discounted cash flows or observable market price of the impaired loan is lower than the carrying value of that loan. The scope of loans reviewed individually each quarter to determine if they are impaired include all commercial loan relationships greater than $200,000 and any residential mortgage or consumer loans of $400,000 or more for which there is at least one extension of credit graded Special Mention, Substandard or Doubtful. Loans that are individually reviewed, but which are determined to not be impaired, are combined with all remaining loans that are not reviewed on a specific basis, and such loans are included within larger pools of loans based on similar risk and loss characteristics for purposes of determining the general component of the allowance. All loans classified as troubled debt restructurings and all commercial loan relationships less than $200,000 or other loan relationships less than $400,000 in the aggregate, but with an estimated loss of $100,000 or more, are individually evaluated for impairment. The general component covers pools of loans by loan class including commercial loans not considered individually impaired, as well as smaller balance homogeneous classes of loans, such as residential real estate, home equity lines of credit and other consumer loans. Accordingly, the Corporation generally does not separately identify individual consumer and residential loans for impairment disclosures, unless such a loan: (1) is subject to a restructuring agreement, (2) has an outstanding balance of $400,000 or more and a credit grade of Special Mention, Substandard or Doubtful, or (3) has an estimated loss of $100,000 or more. The pools of loans for each loan segment are evaluated for loss exposure based upon average historical net charge-off rates, adjusted for qualitative factors. The time period used in determining the average historical net charge-off rate for each loan class is based on management’s evaluation of an appropriate time period that captures an historical loss experience relevant to the current portfolio. Qualitative risk factors (described in the following paragraph) are evaluated for the impact on each of the three distinct segments (residential mortgage, commercial and consumer) within the loan portfolio. Each qualitative factor is assigned a value to reflect improving, stable or declining conditions based on management’s judgment using relevant information available at the time of the evaluation. Any adjustments to the factors are supported by a narrative documentation of changes in conditions accompanying the allowance for loan losses calculation. The qualitative factors used in the general component calculations are designed to address credit risk characteristics associated with each segment. The Corporation’s credit risk associated with all of the segments is significantly impacted by these factors, which include economic conditions within its market area, the Corporation’s lending policies, changes or trends in the portfolio, risk profile, competition, regulatory requirements and other factors. Purchased loans that did not show evidence of credit deterioration at the acquisition dates were initially recorded at fair value, including a discount for credit losses reflecting an estimate of the present value of credit losses based on market expectations. The general component of the allowance on purchased loans is evaluated separately from the rest of the portfolio. This evaluation includes consideration of the qualitative risk factors described above as well as the remaining purchased discount. Loans are classified as impaired when, based on current information and events, it is probable that the Corporation will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value 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 shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial loans by the fair value of the collateral (if the loan is collateral dependent), by future cash flows discounted at the loan’s effective rate or by the loan’s observable market price. For commercial loans secured by real estate, estimated fair values are determined primarily through third-party appraisals. When a real estate secured loan becomes impaired, a decision is made regarding whether an updated certified appraisal of the real estate is necessary. This decision is based on various considerations, including the age of the most recent appraisal, the loan-to-value ratio based on the original appraisal and the condition of the property. Appraised values are discounted to arrive at the estimated selling price of the collateral, which is considered to be the estimated fair value. The discounts also include estimated costs to sell the property. For commercial and industrial loans secured by non-real estate collateral, such as accounts receivable, inventory and equipment, estimated fair values are determined based on the borrower’s financial statements, inventory reports, accounts receivable aging data or equipment appraisals or invoices. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. Loans whose terms are modified are classified as troubled debt restructurings if the Corporation grants such borrowers concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a troubled debt restructuring generally involve reductions in required payments, an extension of a loan’s stated maturity date or a temporary reduction in interest rate. Loans classified as troubled debt restructurings are designated as impaired. Nonaccrual troubled debt restructurings may be restored to accrual status if the ultimate collectability of principal and interest payments under the modified terms is not in doubt, and there has been a period (generally, for at least six consecutive months) of satisfactory payment performance by the borrower either immediately before or after the restructuring. In March 2020, various regulatory agencies, including the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporation issued an interagency statement on loan modifications and reporting for financial institutions working with customers affected by COVID-19. The interagency statement was effective immediately and impacted accounting for loan modifications. The agencies confirmed with the staff of the FASB that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief, are not to be considered TDRs. Provisions of the CARES Act Section 4013 largely mirrored the provisions of the interagency statement, providing that modified loans were not to be considered TDRs if they were performing at December 31, 2019 and other consideration set forth in the interagency statements were met. Borrowers considered current are those that are less than 30 days past due on their contractual payments at the time a modification program is implemented or at December 31, 2019. BANK PREMISES AND EQUIPMENT – IMPAIRMENT OF LONG-LIVED ASSETS – FORECLOSED ASSETS HELD FOR SALE – GOODWILL – CORE DEPOSIT INTANGIBLES – SERVICING RIGHTS INCOME TAXES available evidence. Tax benefits from investments in limited partnerships that have qualified for federal low-income tax credits are recognized as a reduction in the provision for income tax over the term of the investment using the effective yield method. The Corporation includes income tax penalties in the provision for income tax. The Corporation has no accrued interest related to unrecognized tax benefits. STOCK COMPENSATION PLANS The fair value of each stock option is estimated on the date of grant using the Black-Scholes-Merton option valuation model. The fair value of restricted stock is based on the current market price on the date of grant. OFF-BALANCE SHEET FINANCIAL INSTRUMENTS – CASH FLOWS – REVENUE RECOGNITION – Additional disclosures related to the Corporation’s largest sources of noninterest income within the consolidated statements of income from contracts with customers that are subject to Accounting Standards Codification (ASC) Topic 606 are as follows: Trust and financial management revenue – Trust revenue is recorded on a cash basis, which is not materially different from the accrual basis. The majority (approximately 83%, based on annual 2020 results) of trust revenue is earned and collected monthly, with the amount determined based on a percentage of the fair value of the trust assets under management. Wealth management fees are contractually agreed with each customer, and fee levels vary based mainly on the size of assets under management. The services provided under such a contract represent a single performance obligation under the Accounting Standards Updates (ASUs) because it embodies a series of distinct goods or services that are substantially the same and have the same pattern of transfer to the customer. None of the contracts with trust customers provide for incentive-based fees. In addition to wealth management fees, trust revenue includes fees for provision of services, including employee benefit plan administration, tax return preparation and estate planning and settlement. Fees for such services are billed based on contractual arrangements or established fee schedules and are typically billed upon completion of providing such services. The costs of acquiring trust customers are incremental and recognized within noninterest expense in the consolidated statements of income. Service charges on deposit accounts services are provided to the customers. Incremental costs of obtaining deposit contracts are not significant and are recognized as expense when incurred within noninterest expense in the consolidated statements of income. Interchange revenue from debit card transactions –

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	12 Months Ended
	Dec. 31, 2020
RECENT ACCOUNTING PRONOUNCEMENTS
RECENT ACCOUNTING PRONOUNCEMENTS	2. RECENT ACCOUNTING PRONOUNCEMENTS The Financial Accounting Standards Board (FASB) issues ASUs to the FASB ASC. This section provides a summary description of recent ASUs that have significant implications (elected or required) within the consolidated financial statements, or that management expects may have a significant impact on financial statements issued in the foreseeable future. Recent Accounting Pronouncements - Adopted Effective January 1, 2020, the Corporation adopted ASU 2018-13, Fair Value Measurement (Topic 820), which modifies disclosure requirements on fair value measurements. This ASU removes requirements to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels and the valuation processes for Level 3 fair value measurements. ASU 2018-13 clarifies that disclosure regarding measurement uncertainty is intended to communicate information about the uncertainty in measurement as of the reporting date. ASU 2018-13 adds certain disclosure requirements, including disclosure of changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements and the narrative description of measurement uncertainty should be applied prospectively, while all other amendments should be applied retrospectively for all periods presented. Note 22 provides disclosure regarding fair value measurements of the Corporation’s financial instruments. Adoption of this ASU did not have a material impact on the Corporation’s consolidated financial position or results of operations. Recently Issued But Not Yet Effective Accounting Pronouncements ASU 2016-13, Financial Instruments-Credit Losses (Topic 326), as modified by subsequent ASUs, changes accounting for credit losses on loans receivable and debt securities from an incurred loss methodology to an expected credit loss methodology. Among other things, ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Accordingly, ASU 2016-13 requires the use of forward-looking information to form credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, though the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, ASU 2016-13 amends the accounting for credit losses on debt securities and purchased financial assets with credit deterioration. The effect of implementing this ASU is recorded through a cumulative-effect adjustment to retained earnings. The Corporation has formed a cross functional management team and is working with an outside vendor assessing alternative loss estimation methodologies and the Corporation’s data and system needs to evaluate the impact that adoption of this standard will have on the Corporation’s financial condition and results of operations. In November 2019, the FASB approved a delay of the required implementation date of ASU 2016-13 for smaller reporting companies, including the Corporation, resulting in a required implementation date for the Corporation of January 1, 2023. ASU 2020-04, Reference Rate Reform (Topic 848) provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The amendments in Update 2020-04 are elective and apply to all entities that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued. The guidance includes a general principle that permits an entity to consider contract modifications due to reference rate reform to be an event that does not require contract remeasurement at the modification date or reassessment of a previous accounting determination. Some specific optional expedients are as follows: ● Simplifies accounting for contract modifications, including modifications to loans receivable and debt, by prospectively adjusting the effective interest rate. ● Simplifies the assessment of hedge effectiveness and allows hedging relationships affected by reference rate reform to continue. The amendments in ASU 2020-04 are effective as of March 12, 2020 through December 31, 2022. The Corporation expects to apply the amendments prospectively for applicable loan and other contracts within the effective period of ASU 2020-04.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2020
BUSINESS COMBINATIONS
BUSINESS COMBINATIONS	​ 3. BUSINESS COMBINATIONS Acquisition of Covenant Financial, Inc. On July 1, 2020, the Corporation completed its acquisition of Covenant Financial, Inc. (“Covenant”). Covenant was the holding company for Covenant Bank, which operated banking offices in Bucks and Chester Counties of Pennsylvania. Management believes the acquisition provides an opportunity to expand the Corporation’s presence in a higher growth market and further leverage the Corporation’s capital to enhance long-term shareholder value. The consolidated financial statements include the formerly separate Covenant operations from July 1, 2020 through December 31, 2020. Since the activities of the former Covenant operations have been combined with those of the Corporation, separate disclosure of Covenant-related financial information included in the consolidated financial statements is not practicable. Total purchase consideration was $63,266,000, including cash paid to former Covenant shareholders totaling $21,654,000 and 2,047,819 shares of Corporation common stock issued with a value of $41,612,000. In the table below, the cash portion of merger consideration includes $183,000 of costs directly related to issuance of stock, and the equity portion of merger consideration has been reduced by these costs. The merger was accounted for using the acquisition method of accounting and, accordingly, purchased assets, including identifiable intangible assets, and assumed liabilities were recorded at their respective acquisition date fair values. The fair value measurements of assets acquired and liabilities assumed are subject to refinement for up to one year after the closing date of the acquisition as additional information relative to closing date fair values becomes available. As adjusted in the fourth quarter 2020, the fair value of assets acquired, excluding goodwill, totaled $608,485,000, while the fair value of liabilities assumed totaled $569,336,000. Goodwill represents consideration transferred in excess of the fair value of the net assets acquired. At December 31, 2020, goodwill associated with the acquisition was $24,117,000. The goodwill resulting from the acquisition represents the value expected from the further expansion of the Corporation’s market penetration into Southeastern Pennsylvania, adding to the base established in the acquisition of Monument Bancorp, Inc. in 2019. Goodwill acquired in the Covenant merger is not deductible for tax purposes as the acquisition is accounted for as a tax-free exchange for tax purposes. In the fourth quarter 2020, the Corporation recorded adjustments to the initial fair value measurements of certain assets and liabilities that resulted in a net decrease in goodwill of $21,000, summarized as follows: ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Preliminary goodwill balance, September 30, 2020 ​ $ 24,138 Adjustments in fourth quarter 2020: ​ ​ ​ Write-down purchased credit impaired loan ​ ​ 556 Increase deferred tax asset, net ​ ​ (410) Decrease other liabilities ​ ​ (167) Goodwill balance, December 31, 2020 ​ $ 24,117 ​ The following table summarizes the consideration paid for Covenant and the estimated fair values of the assets acquired and liabilities assumed at the acquisition date: ​ ​ ​ ​ ​ (In Thousands) ​ Fair value of consideration transferred: ​ ​ ​ Cash ​ $ 21,837 Common stock issued ​ 41,429 Total consideration transferred ​ $ 63,266 ​ ​ ​ ​ Estimated fair value of assets acquired and (liabilities) assumed: ​ ​ ​ Cash and cash equivalents ​ $ 97,792 Available-for-sale debt securities ​ 10,754 Loans receivable ​ 464,236 Bank-owned life insurance ​ 11,170 Accrued interest receivable ​ 1,922 Bank premises and equipment ​ 3,250 Foreclosed assets held for sale ​ 860 Deferred tax asset, net ​ 1,879 Core deposit intangible ​ 3,144 Goodwill ​ 24,117 Other assets ​ 13,478 Deposits ​ (481,796) Short-term borrowings ​ (33,950) Long-term borrowings ​ (30,025) Subordinated debt ​ (10,091) Accrued interest and other liabilities ​ ​ (13,474) Estimated excess fair value of assets acquired over liabilities assumed ​ $ 63,266 ​ In the consolidated statements of cash flows, investing and financing activities exclude the following noncash items: the issuance of common stock as part of the merger consideration as well as the following categories of assets acquired and liabilities assumed from Covenant as reflected in the table above: available-for-sale debt securities, loans receivable, bank-owned life insurance, bank premises and equipment, foreclosed assets held for sale, core deposit intangible, goodwill, other assets (including Federal Home Loan Bank of Pittsburgh stock of $2,939,000), deposits, short-term borrowings, long-term borrowings, subordinated debt and accrued interest and other liabilities. Acquisition date fair values for available-for-sale securities were determined using Level 1 inputs consistent with the methods discussed further in Note 22. The determination of estimated fair values of the acquired loans required the Corporation to make certain estimates about discount rates, future expected cash flows, market conditions and other future events that are highly subjective in nature. Based on such factors as past due status, nonaccrual status, bankruptcy status, and credit risk ratings, the acquired loans were evaluated, and twenty-four loans displayed evidence of credit quality deterioration. These loans are accounted for under ASC 310-30 (purchased credit impaired, or “PCI”). The majority of the purchased loans did not display evidence of impairment, and thus are accounted for under ASC 310-20. Expected cash flows, both principal and interest, were estimated based on key assumptions covering such factors as prepayments, default rates and severity of loss given default. These assumptions were developed using both Covenant’s historical experience and the portfolio characteristics as of the acquisition date as well as available market research. The fair value estimates for acquired loans were based on the amount and timing of expected principal, interest and other cash flows, including expected prepayments, discounted at prevailing market interest rates applicable to the types of acquired loans, which the Corporation considers Level 3 fair value measurements. Loans acquired from Covenant were measured at fair value at the acquisition date with no carryover of an allowance for loan losses. The following table presents performing and PCI loans acquired, by loan segment and class, as adjusted, at July 1, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Performing ​ ​ PCI ​ Total Residential mortgage: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 65,883 ​ ​ $ 0 ​ $ 65,883 Residential mortgage loans - junior liens ​ ​ 4,141 ​ ​ ​ 75 ​ ​ 4,216 Home equity lines of credit ​ ​ 8,368 ​ ​ ​ 0 ​ ​ 8,368 1-4 Family residential construction ​ ​ 11,437 ​ ​ ​ 0 ​ ​ 11,437 Total residential mortgage ​ ​ 89,829 ​ ​ ​ 75 ​ ​ 89,904 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ ​ 240,482 ​ ​ ​ 4,152 ​ ​ 244,634 Commercial and industrial ​ ​ 39,068 ​ ​ ​ 806 ​ ​ 39,874 Commercial construction and land ​ ​ 63,740 ​ ​ ​ 0 ​ ​ 63,740 Loans secured by farmland ​ ​ 73 ​ ​ ​ 0 ​ ​ 73 Multi-family (5 or more) residential ​ ​ 23,065 ​ ​ ​ 1,615 ​ ​ 24,680 Other commercial loans ​ ​ 952 ​ ​ ​ 0 ​ ​ 952 Total commercial ​ ​ 367,380 ​ ​ ​ 6,573 ​ ​ 373,953 Consumer ​ ​ 379 ​ ​ ​ 0 ​ ​ 379 Total ​ $ 457,588 ​ ​ $ 6,648 ​ $ 464,236 ​ The following table presents the updated fair value adjustments made to the amortized cost basis of loans acquired on July 1, 2020: ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Gross amortized cost at acquisition ​ $ 472,012 Fair value adjustments: ​ ​ ​ Market rates ​ ​ 2,909 Credit adjustment on non-impaired loans ​ ​ (7,219) Credit adjustment on impaired loans ​ ​ (3,466) Fair value at acquisition ​ $ 464,236 ​ The market rate adjustment represents the movement in interest rates, irrespective of credit adjustments, compared to the contractual rates of the acquired loans. The credit adjustment made on non-PCI loans represents changes in credit quality of the underlying borrowers from loan inception to the acquisition date. The credit adjustment on PCI loans is derived in accordance with ASC 310-30 and represents the portion of the loan balances that have been deemed uncollectible for each loan. The PCI loans are secured by real estate or other collateral, and the fair value of each loan was determined based on the estimated proceeds to be derived from selling the collateral, net of selling costs. The PCI loans were placed into nonaccrual status upon acquisition (and remained in nonaccrual status at December 31, 2020) as the Corporation cannot reasonably estimate cash flows expected to be collected in order to compute yield on the loans. The Corporation recognized a core deposit intangible of $3,144,000. The core deposit intangible represents the estimated value of lower-cost funding provided by the nonmaturity deposits assumed in comparison with the Corporation’s estimated cost of borrowing funds in the market. The valuation assumptions to determine the core deposit intangible were comprised of level 2 and level 3 inputs. The core deposit intangible will be amortized over a weighted-average life of 5.4 years. Deposit liabilities assumed were segregated into two categories: (1) nonmaturity deposits (checking, savings and money market), and (2) time deposits (deposit accounts with a stated maturity). The fair values of both categories of deposits were determined using level 2 fair value measurements. For nonmaturity deposits, the acquisition date outstanding balance of the assumed demand deposit accounts approximates fair value. In determining the fair value of time deposits, the Corporation discounted the contractual cash flows of the deposit accounts using prevailing market interest rates for time deposit accounts of similar type and duration. Short-term and long-term borrowings assumed consisted of advances from the Federal Home Loan Bank of Pittsburgh. The fair value of borrowings was determined using Level 2 measurements by discounting the contractual cash flows of the borrowings using Federal Home Loan Bank interest rates available July 1, 2020 for advances to the same maturities as those of the deposits assumed. Subordinated debt assumed included two issues: (1) agreements with par values totaling $8,000,000, maturing in June 2026, redeemable at par beginning in June 2021 and bearing interest at 6.25%; and (2) an agreement with a par value of $2,000,000, maturing in July 2027, redeemable at par beginning in July 2022 and bearing interest at 6.50%. The fair value of subordinated debt was determined using Level 2 measurements by comparing the interest rates on the debt to the rates on similar recent issues of comparable size by other similar-sized banking companies. The Corporation incurred merger-related expenses associated with the Covenant transaction of $7,708,000 in 2020 and $287,000 in 2019. Merger-related expenses include severance and similar expenses, costs associated with termination of data processing contracts and conversion of Covenant’s customer accounting data into the Corporation’s core system, legal and other professional fees and various other costs. The following table presents pro forma information as if the merger between the Corporation and Covenant had been completed on January 1, 2019. The pro forma information does not necessarily reflect the results of operations that would have occurred had the merger taken place at the beginning of 2019. The supplemental pro forma information excludes merger-related expenses totaling $9,061,000 in 2020 (including $1,353,000 incurred by Covenant), or $7,245,000 net of tax (including $1,111,000 incurred by Covenant). The pro forma also excludes a tax benefit of $600,000 that Covenant realized from stock-based compensation vested upon completion of the merger. The pro forma information does not include the impact of possible business model changes nor does it consider any potential impacts of current market conditions or revenues, expense efficiencies or other factors. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ Dec. 31, ​ Dec. 31, (In Thousands Except Per Share Data) ​ 2020 ​ 2019 Interest income ​ $ 88,379 ​ $ 88,830 Interest expense ​ ​ 13,407 ​ ​ 15,156 Net interest income ​ ​ 74,972 ​ ​ 73,674 Provision for loan losses ​ ​ 4,013 ​ ​ 1,309 Net interest income after provision for loan losses ​ ​ 70,959 ​ ​ 72,365 Noninterest income ​ ​ 24,657 ​ ​ 20,550 Net gains on securities ​ ​ 169 ​ ​ 23 Loss on prepayment of borrowings ​ ​ 1,636 ​ ​ 0 Other noninterest expenses ​ ​ 60,094 ​ ​ 62,377 Income before income tax provision ​ ​ 34,055 ​ ​ 30,561 Income tax provision ​ ​ 6,227 ​ ​ 5,311 Net income ​ $ 27,828 ​ $ 25,250 Earnings per common share - basic ​ $ 1.75 ​ $ 1.64 Earnings per common share - diluted ​ $ 1.75 ​ $ 1.63 ​ Business Combination – Acquisition of Monument Bancorp, Inc. On April 1, 2019, the Corporation completed its acquisition of 100% of the common stock of Monument Bancorp, Inc. (“Monument”). Monument was the parent company of Monument Bank, a commercial bank which operated two community bank offices and one lending office in Bucks County, Pennsylvania. Pursuant to the merger, Monument was merged into Citizens & Northern Corporation and Monument Bank was merged into C&N Bank. Total purchase consideration was $42.7 million, including cash paid to former Monument shareholders totaling $9.6 million and 1,279,825 shares of Corporation common stock issued with a value of $33.1 million, net of costs directly related to stock issuance of $181,000. In connection with the transaction, the Corporation recorded goodwill of $16.4 million and a core deposit intangible asset of $1.5 million. Total loans acquired on April 1, 2019 were valued at $259.3 million, while total deposits assumed were valued at $223.3 million, borrowings were valued at $111.6 million and subordinated debt was valued at $12.4 million. The subordinated debt included an instrument with a fair value of $5.4 million that was redeemed on April 1, 2019 with no realized gain or loss. The Corporation acquired available-for-sale debt securities valued at $94.6 million and sold the securities in early April for approximately no realized gain or loss. The assets purchased and liabilities assumed in the merger were recorded at their estimated fair values at the time of closing, subject to refinement for up to one year after the closing date. There were no adjustments to the fair value measurements of assets or liabilities in 2020. Merger-related expenses associated with the Monument acquisition, including legal and professional expenses and conversion of Monument’s customer accounting data into the Corporation’s core system, were $3,812,000 in 2019.

PER SHARE DATA

PER SHARE DATA	12 Months Ended
	Dec. 31, 2020
PER SHARE DATA
PER SHARE DATA	4. PER SHARE DATA Basic earnings per common share are calculated using the two-class method to determine income attributable to common shareholders. Unvested restricted stock awards that contain nonforfeitable rights to dividends are considered participating securities under the two-class method. Distributed dividends and an allocation of undistributed net income to participating securities reduce the amount of income attributable to common shareholders. Income attributable to common shareholders is then divided by weighted-average common shares outstanding for the period to determine basic earnings per common share. Diluted earnings per common share are calculated under the more dilutive of either the treasury method or the two-class method. Diluted earnings per common share is computed using weighted-average common shares outstanding, plus weighted-average common shares available from the exercise of all dilutive stock options, less the number of shares that could be repurchased with the proceeds of stock option exercises based on the average share price of the Corporation’s common stock during the period. ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands, Except Share and Per Share Data) Years Ended ​ ​ December 31, ​ December 31, ​ 2020 2019 Basic ​ ​ Net income ​ $ 19,222 ​ $ 19,504 Less: Dividends and undistributed earnings allocated to participating securities ​ (116) ​ (100) Net income attributable to common shares ​ $ 19,106 ​ $ 19,404 Basic weighted-average common shares outstanding ​ 14,743,386 ​ 13,298,736 Basic earnings per common share (a) ​ $ 1.30 ​ $ 1.46 Diluted ​ ​ Net income attributable to common shares ​ $ 19,106 ​ $ 19,404 Basic weighted-average common shares outstanding ​ 14,743,386 ​ 13,298,736 Dilutive effect of potential common stock arising from stock options ​ 3,662 ​ 22,823 Diluted weighted-average common shares outstanding ​ 14,747,048 ​ 13,321,559 Diluted earnings per common share (a) ​ $ 1.30 ​ $ 1.46 (a) Basic and diluted earnings per share under the two-class method are determined on net income reported on the income statement less earnings allocated to nonvested restricted shares with nonforfeitable dividends (participating securities). The weighted-average number of nonvested restricted shares outstanding was 89,718 shares in 2020 and 68,358 shares in 2019. Anti-dilutive stock options are excluded from net income per share calculations. Weighted-average common shares available from anti-dilutive instruments totaled 32,538 shares in 2020. There were no anti-dilutive instruments in 2019. ​

COMPREHENSIVE INCOME

COMPREHENSIVE INCOME	12 Months Ended
	Dec. 31, 2020
COMPREHENSIVE INCOME
COMPREHENSIVE INCOME	5. COMPREHENSIVE INCOME Comprehensive income is the total of (1) net income, and (2) all other changes in equity from non-stockholder sources, which are referred to as other comprehensive income (loss). The components of other comprehensive income (loss), and the related tax effects, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Before-Tax Income Tax Net-of-Tax ​ ​ Amount ​ Effect ​ Amount 2020 ​ ​ ​ Unrealized gains on available-for-sale debt securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized holding gains on available-for-sale debt securities ​ $ 10,504 ​ $ (2,205) ​ $ 8,299 Reclassification adjustment for (gains) realized in income ​ ​ (169) ​ ​ 35 ​ ​ (134) Other comprehensive income on available-for-sale debt securities ​ ​ 10,335 ​ ​ (2,170) ​ ​ 8,165 Unfunded pension and postretirement obligations: ​ ​ ​ Changes from plan amendments and actuarial gains and losses included in other comprehensive income ​ (49) ​ 11 ​ (38) Amortization of prior service cost and net actuarial loss included in net periodic benefit cost ​ (29) ​ 6 ​ (23) Other comprehensive loss on unfunded retirement obligations ​ (78) ​ 17 ​ (61) Total other comprehensive income ​ $ 10,257 ​ $ (2,153) ​ $ 8,104 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Before-Tax Income Tax Net-of-Tax ​ ​ Amount ​ Effect ​ Amount 2019 ​ ​ ​ Unrealized gains on available-for-sale debt securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized holding gains on available-for-sale debt securities ​ $ 9,920 ​ $ (2,084) ​ $ 7,836 Reclassification adjustment for (gains) realized in income ​ ​ (23) ​ ​ 5 ​ ​ (18) Other comprehensive income on available-for-sale debt securities ​ $ 9,897 ​ $ (2,079) ​ $ 7,818 Unfunded pension and postretirement obligations: ​ ​ ​ Changes from plan amendments and actuarial gains and losses included in other comprehensive income ​ 87 ​ (19) ​ 68 Amortization of prior service cost and net actuarial loss included in net periodic benefit cost ​ (32) ​ 7 ​ (25) Other comprehensive income on unfunded retirement obligations ​ 55 ​ (12) ​ 43 Total other comprehensive income ​ $ 9,952 ​ $ (2,091) ​ $ 7,861 ​ Items reclassified out of each component of accumulated other comprehensive income (loss) are as follows: ​ ​ ​ ​ ​ ​ Affected Line Item in the Description Consolidated Statements of Income Amortization of prior service cost and net actuarial loss included in net periodic benefit cost (before-tax) Other noninterest expense Reclassification adjustment for (gains) realized in income (before-tax) ​ Realized gains on available-for-sale debt securities, net Income tax effect ​ Income tax provision ​ Changes in the components of accumulated other comprehensive income (loss), included in stockholders’ equity, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Unrealized Accumulated ​ ​ ​ Gains ​ Unfunded ​ Other ​ (Losses) Retirement Comprehensive ​ on Securities Obligations Income (Loss) 2020 ​ ​ ​ Balance, beginning of period ​ $ 3,511 ​ $ 180 ​ $ 3,691 Other comprehensive income (loss) during year ended December 31, 2020 ​ 8,165 ​ (61) ​ 8,104 Balance, end of period ​ $ 11,676 ​ $ 119 ​ $ 11,795 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 ​ ​ ​ Balance, beginning of period ​ $ (4,307) ​ $ 137 ​ $ (4,170) Other comprehensive income during year ended December 31, 2019 ​ 7,818 ​ 43 ​ 7,861 Balance, end of period ​ $ 3,511 ​ $ 180 ​ $ 3,691 ​ ​

CASH AND DUE FROM BANKS

CASH AND DUE FROM BANKS	12 Months Ended
	Dec. 31, 2020
CASH AND DUE FROM BANKS
CASH AND DUE FROM BANKS	6. CASH AND DUE FROM BANKS Cash and due from banks at December 31, 2020 and 2019 include the following: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Cash and cash equivalents ​ $ 96,017 ​ $ 31,122 Certificates of deposit ​ 5,840 ​ 4,080 Total cash and due from banks ​ $ 101,857 ​ $ 35,202 ​ Certificates of deposit are issues by U.S. banks with original maturities greater than three months. Each certificate of deposit is fully FDIC-insured. The Corporation maintains cash and cash equivalents with certain financial institutions in excess of the FDIC insurance limit. Historically, C&N Bank has been required to maintain reserves against deposit liabilities in the form of cash and balances with the Federal Reserve Bank of Philadelphia. The reserves are based on deposit levels, account activity, and other services provided by the Federal Reserve Bank. In March 2020, the Federal Reserve Board reduced reserve requirements for U.S. banks to 0%. Accordingly, C&N Bank had no required reserves at December 31, 2020 and $20,148,000 at December 31, 2019.

SECURITIES

SECURITIES	12 Months Ended
	Dec. 31, 2020
SECURITIES
SECURITIES	7. SECURITIES Amortized cost and fair value of available-for-sale debt securities at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, 2020 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ Unrealized ​ ​ ​ ​ Amortized Holding Holding Fair ​ Cost Gains Losses Value ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of the U.S. Treasury ​ $ 12,184 ​ $ 0 ​ $ (2) ​ $ 12,182 Obligations of U.S. Government agencies ​ ​ 25,349 ​ ​ 1,003 ​ ​ (8) ​ ​ 26,344 Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ ​ Tax-exempt ​ 116,427 ​ 6,000 ​ (26) ​ 122,401 Taxable ​ 45,230 ​ 2,246 ​ (24) ​ 47,452 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 36,853 ​ 1,323 ​ 0 ​ 38,176 Residential collateralized mortgage obligations ​ 56,048 ​ 1,428 ​ (9) ​ 57,467 Commercial mortgage-backed securities ​ 42,461 ​ 2,849 ​ 0 ​ 45,310 Total available-for-sale debt securities ​ $ 334,552 ​ $ 14,849 ​ $ (69) ​ $ 349,332 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, 2019 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Unrealized ​ Unrealized ​ ​ ​ ​ Amortized Holding Holding Fair ​ Cost Gains Losses Value ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of U.S. Government agencies ​ $ 16,380 ​ $ 620 ​ $ 0 ​ $ 17,000 Obligations of states and political subdivisions: ​ ​ ​ ​ Tax-exempt ​ 68,787 ​ 2,011 ​ (38) ​ 70,760 Taxable ​ 35,446 ​ 927 ​ (70) ​ 36,303 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 58,875 ​ 472 ​ (137) ​ 59,210 Residential collateralized mortgage obligations ​ 115,025 ​ 308 ​ (610) ​ 114,723 Commercial mortgage-backed securities ​ 47,765 ​ 1,069 ​ (107) ​ 48,727 Total available-for-sale debt securities ​ $ 342,278 ​ $ 5,407 ​ $ (962) ​ $ 346,723 ​ The following table presents gross unrealized losses and fair value of available-for-sale debt securities with unrealized loss positions that are not deemed to be other-than-temporarily impaired, aggregated by length of time that individual securities have been in a continuous unrealized loss position at December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 Less Than 12 Months 12 Months or More Total (In Thousands) ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Value Losses Value Losses Value Losses Obligations of the U.S. Treasury ​ $ 9,159 ​ $ (2) ​ $ 0 ​ $ 0 ​ $ 9,159 ​ $ (2) Obligations of U.S. Government agencies ​ ​ 4,992 ​ ​ (8) ​ ​ 0 ​ ​ 0 ​ ​ 4,992 ​ ​ (8) Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt ​ ​ 3,811 ​ ​ (26) ​ ​ 0 ​ ​ 0 ​ ​ 3,811 ​ ​ (26) Taxable ​ 5,235 ​ (24) ​ 0 ​ 0 ​ 5,235 ​ (24) Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, ​ ​ ​ ​ ​ ​ Residential collateralized mortgage obligations ​ 2,861 ​ (9) ​ 0 ​ 0 ​ 2,861 ​ (9) Total temporarily impaired available for sale debt securities ​ $ 26,058 ​ $ (69) ​ $ 0 ​ $ 0 ​ $ 26,058 ​ $ (69) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 Less Than 12 Months 12 Months or More Total (In Thousands) ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Value Losses Value Losses Value Losses Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ Tax-exempt ​ $ 6,429 ​ $ (38) ​ $ 0 ​ $ 0 ​ $ 6,429 ​ $ (38) Taxable ​ 5,624 ​ (68) ​ 161 ​ (2) ​ 5,785 ​ (70) Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential pass-through securities ​ 9,771 ​ (35) ​ 14,787 ​ (102) ​ 24,558 ​ (137) Residential collateralized mortgage obligations ​ 31,409 ​ (195) ​ 30,535 ​ (415) ​ 61,944 ​ (610) Commercial mortgage-backed securities ​ 0 ​ 0 ​ 8,507 ​ (107) ​ 8,507 ​ (107) Total temporarily impaired available-for-sale debt securities ​ $ 53,233 ​ $ (336) ​ $ 53,990 ​ $ (626) ​ $ 107,223 ​ $ (962) ​ Gross realized gains and losses from available-for-sale securities and the related income tax provision were as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ 2020 ​ 2019 Gross realized gains from sales ​ $ 222 ​ $ 24 Gross realized losses from sales ​ (53) ​ (1) Net realized gains ​ $ 169 ​ $ 23 Income tax provision related to net realized gains ​ $ 35 ​ $ 5 ​ The amortized cost and fair value of available-for-sale debt securities by contractual maturity are shown in the following table as of December 31, 2020. Actual maturities may differ from contractual maturities because counterparties may have the right to call or prepay obligations with or without call or prepayment penalties. ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, 2020 ​ ​ Amortized ​ Fair ​ Cost Value Due in one year or less ​ $ 13,409 ​ $ 13,506 Due from one year through five years ​ 46,172 ​ 47,758 Due from five years through ten years ​ 47,535 ​ 50,110 Due after ten years ​ 92,074 ​ 97,005 Sub-total ​ 199,190 ​ 208,379 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ Residential pass-through securities ​ 36,853 ​ 38,176 Residential collateralized mortgage obligations ​ 56,048 ​ 57,467 Commercial mortgage-backed securities ​ 42,461 ​ 45,310 Total ​ $ 334,552 ​ $ 349,332 ​ The Corporation’s mortgage-backed securities and collateralized mortgage obligations have stated maturities that may differ from actual maturities due to borrowers’ ability to prepay obligations. Cash flows from such investments are dependent upon the performance of the underlying mortgage loans and are generally influenced by the level of interest rates. In the table above, mortgage-backed securities and collateralized mortgage obligations are shown in one period. Investment securities carried at $247,373,000 at December 31, 2020 and $215,270,000 at December 31, 2019 were pledged as collateral for public deposits, trusts and certain other deposits as provided by law. See Note 12 for information concerning securities pledged to secure borrowing arrangements and Note 21 for information related to securities pledged against interest rate swap obligations. Management evaluates securities for OTTI at least on a quarterly basis, and more frequently when economic or market conditions warrant such evaluation. Consideration is given to (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) whether the Corporation intends to sell the security or more likely than not will be required to sell the security before its anticipated recovery. A summary of information management considered in evaluating debt and equity securities for OTTI at December 31, 2020 and 2019 is provided below. Debt Securities At December 31, 2020 and 2019, management performed an assessment for possible OTTI of the Corporation’s debt securities on an issue-by-issue basis, relying on information obtained from various sources, including publicly available financial data, ratings by external agencies, brokers and other sources. The extent of individual analysis applied to each security depended on the size of the Corporation’s investment, as well as management’s perception of the credit risk associated with each security. Based on the results of the assessment, management believes impairment of these debt securities at December 31, 2020 and 2019 to be temporary. Equity Securities C&N Bank is a member of the Federal Home Loan Bank of Pittsburgh (FHLB-Pittsburgh), which is one of 11 regional Federal Home Loan Banks. As a member, C&N Bank is required to purchase and maintain stock in FHLB-Pittsburgh. There is no active market for FHLB-Pittsburgh stock, and it must ordinarily be redeemed by FHLB-Pittsburgh in order to be liquidated. C&N Bank’s investment in FHLB-Pittsburgh stock, included in Other Assets in the consolidated balance sheets, was $9,720,000 at December 31, 2020 and $10,131,000 at December 31, 2019. The Corporation evaluated its holding of FHLB-Pittsburgh stock for impairment and deemed the stock to not be impaired at December 31, 2020 and December 31, 2019. In making this determination, management concluded that recovery of total outstanding par value, which equals the carrying value, is expected. The decision was based on review of financial information that FHLB-Pittsburgh has made publicly available. The Corporation’s marketable equity security, with a carrying value of $1,000,000 at December 31, 2020 and $979,000 at December 31, 2019, consisted exclusively of one mutual fund. There was no unrealized gain/loss on the mutual fund at December 31, 2020 and an unrealized loss of $21,000 at December 31, 2019. The decrease in the unrealized loss of $21,000 in 2020 and the decrease in the unrealized loss of $29,000 in 2019 are included in other noninterest income in the consolidated statements of income. There were no sales of equity securities in 2020 and 2019.

LOANS

LOANS	12 Months Ended
	Dec. 31, 2020
LOANS
LOANS	8. LOANS The loans receivable portfolio is segmented into residential mortgage, commercial and consumer loans. Loans outstanding at December 31, 2020 and December 31, 2019 are summarized by segment, and by classes within each segment, as follows: ​ Summary of Loans by Type (In Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ Dec. 31, Dec. 31, ​ 2020 ​ 2019 Residential mortgage: ​ ​ ​ Residential mortgage loans - first liens ​ $ 532,947 ​ $ 510,641 Residential mortgage loans - junior liens ​ 27,311 ​ 27,503 Home equity lines of credit ​ 39,301 ​ 33,638 1-4 Family residential construction ​ 20,613 ​ 14,798 Total residential mortgage ​ 620,172 ​ 586,580 Commercial: ​ ​ Commercial loans secured by real estate ​ 531,810 ​ 301,227 Commercial and industrial ​ 159,577 ​ 126,374 Small Business Administration - Paycheck Protection Program ​ ​ 132,269 ​ ​ 0 Political subdivisions ​ 53,221 ​ 53,570 Commercial construction and land ​ 42,874 ​ 33,555 Loans secured by farmland ​ 11,736 ​ 12,251 Multi-family (5 or more) residential ​ 55,811 ​ 31,070 Agricultural loans ​ 3,164 ​ 4,319 Other commercial loans ​ 17,289 ​ 16,535 Total commercial ​ 1,007,751 ​ 578,901 Consumer ​ 16,286 ​ 16,741 Total ​ 1,644,209 ​ 1,182,222 Less: allowance for loan losses ​ (11,385) ​ (9,836) Loans, net ​ $ 1,632,824 ​ $ 1,172,386 ​ In the table above, outstanding loan balances are presented net of deferred loan origination fees, of $6,286,000 at December 31, 2020 and $2,482,000 at December 31, 2019. The Corporation grants loans to individuals as well as commercial and tax-exempt entities. Commercial, residential and personal loans are made to customers geographically concentrated in the northern tier and northcentral Pennsylvania, the southern tier of New York State and southeastern Pennsylvania. Although the Corporation has a diversified loan portfolio, a significant portion of its debtors’ ability to honor their contracts is dependent on the local economic conditions within the region. There is no concentration of loans to borrowers engaged in similar businesses or activities that exceed 10%of total loans at either December 31, 2020 or December 31, 2019. On March 27, 2020, the CARES Act was signed into law. The CARES Act is a $2 trillion stimulus package designed to provide relief to U.S. businesses and consumers struggling as a result of the pandemic. A provision in the CARES Act includes creation of the Paycheck Protection Program (“PPP”) through the Small Business Administration (“SBA”) and Treasury Department. Under the PPP, the Corporation, as an SBA-certified lender, provides SBA-guaranteed loans to small businesses to pay their employees, rent, mortgage interest, and utilities. PPP loans will be forgiven subject to clients’ providing documentation evidencing their compliant use of funds and otherwise complying with the terms of the program. The maximum term of PPP loans is five years, though most of the Corporation’s PPP loans have two-year terms, and the Corporation will be repaid sooner to the extent the loans are forgiven. The interest rate on PPP loans is 1%, and the Corporation has received fees from the SBA ranging between 1% and 5% per loan, depending on the size of the loan. Fees on PPP loans, net of origination costs and a market rate adjustment on PPP loans acquired from Covenant, are recognized in interest income as a yield adjustment over the term of the loans. The Corporation began accepting and processing applications for loans under the PPP on April 3, 2020. Covenant also engaged in PPP lending starting in early April 2020. As of December 31, 2020, the recorded investment in PPP loans was $132,269,000, including contractual principal balances of $134,802,000, increased by a market rate adjustment on PPP loans acquired from Covenant of $504,000 and reduced by net deferred origination fees of $3,037,000. Net deferred origination fees and the market rate adjustment on PPP loans are recognized in interest income as yield adjustments (net accretion over the term of the loans). Accretion of fees received on PPP loans, net of amortization of the market rate adjustment on PPP loans acquired from Covenant, was $1,945,000 for the year ended December 31, 2020. Section 4013 of the CARES Act provides that, from the period beginning March 1, 2020 until the earlier of December 31, 2020 or the date that is 60 days after the date on which the national emergency concerning the coronavirus (COVID-19) pandemic declared by the President of the United States under the National Emergencies Act terminates (the “applicable period”), the Corporation may elect to suspend U.S. GAAP for loan modifications related to the pandemic that would otherwise be categorized as TDRs and suspend any determination of a loan modified as a result of the effects of the pandemic as being a TDR, including impairment for accounting purposes. The suspension is applicable for the term of the loan modification that occurs during the applicable period for a loan that was not more than 30 days past due as of December 31, 2019. The suspension is not applicable to any adverse impact on the credit of a borrower that is not related to the pandemic. On December 27, 2020, the President of the United States signed into law the Consolidated Appropriations Act, 2021 (the “CAA Act”), which both funds the federal government until September 30, 2021 and broadly addresses additional COVID-19 responses and relief. Among the additional relief measures included are certain extensions to elements of the CARES Act, including extension of temporary relief from troubled debt restructurings established under Section 4013 of the CARES Act to the earlier of a) January 1, 2022, or b) the date that is 60 days after the date on which the national COVID-19 emergency terminates. The CAA also includes additional funding for the PPP with additional eligibility requirements for borrowers with generally the same loan terms as provided under the CARES Act. In addition, the banking regulators and other financial regulators, on March 22, 2020 and revised April 7, 2020, issued a joint interagency statement titled the “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus” that encourages financial institutions to work prudently with borrowers who are or may be unable to meet their contractual payment obligations due to the effects of the COVID-19 pandemic. Pursuant to the interagency statement, loan modifications that do not meet the conditions of Section 4013 of the CARES Act may still qualify as a modification that does not need to be accounted for as a TDR. Specifically, the agencies confirmed with the FASB staff that short-term modifications made in good faith in response to the pandemic to borrowers who were current prior to any relief are not TDRs under U.S. GAAP. This includes short-term (e.g. six months) modifications such as payment deferrals, fee waivers, extensions of repayment terms, or delays in payment that are insignificant. Borrowers considered current are those that are less than 30 days past due on their contractual payments at the time a modification program is implemented. Appropriate allowances for loan and lease losses are expected to be maintained. With regard to loans not otherwise reportable as past due, financial institutions are not expected to designate loans with deferrals granted due to the pandemic as past due because of the deferral. The interagency statement also states that during short-term pandemic-related loan modifications, these loans generally should not be reported as nonaccrual. To work with clients impacted by COVID-19, the Corporation is offering short-term loan modifications on a case-by-case basis to borrowers who were current in their payments at the inception of the loan modification program. Prior to the merger, Covenant had a similar program in place, and these modified loans have been incorporated into the Corporation’s program. These efforts have been designed to assist borrowers as they deal with the current crisis and help the Corporation mitigate credit risk. For loans subject to the program, each borrower is required to resume making regularly scheduled loan payments at the end of the modification period and the deferred amounts will be moved to the end of the loan term. Consistent with Section 4013 of the CARES Act, the modified loans have not been reported as past due, nonaccrual or as TDRs at December 31, 2020. Most of the modifications under the program became effective in March and the second quarter 2020 and provided a deferral of interest or principal and interest for 90-to-180 days. Accordingly, many of the loans for which deferrals were granted returned to full payment status prior to December 31, 2020. The quantity and balances of modifications outstanding under the program at December 31, 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferrals Remaining ​ ​ As of December 31, 2020 (Dollars in Thousands) ​ Number ​ ​ ​ ​ ​ of ​ Recorded ​ Loans Investment COVID-19-related loan modifications: ​ Residential mortgage 15 ​ $ 2,334 Consumer 3 ​ 61 Commercial 27 ​ 35,002 Total 45 ​ $ 37,397 ​ The ultimate effect of COVID-19 on the local or broader economy is not known. In 2020, the Corporation increased the allowance for loan losses $785,000 based on an increase in qualitative factors related to potential deterioration in economic conditions. Further, in June, September and December 2020, the Corporation’s credit administration and commercial lending staffs performed reviews of commercial credits with “Pass” ratings in an effort to reduce the risk of failing to identify loans that should be evaluated for risk rating downgrade or a specific allowance. Updated risk ratings and specific allowances based on the December 2020 review have been included in the December 31, 2020 information presented below. Because of the significant uncertainties related to the ultimate duration of the COVID-19 pandemic and its economic impact, the total impact on the Corporation’s loan portfolio is not determinable. As described in Note 3, effective July 1, 2020, the Corporation acquired loans pursuant to its acquisition of Covenant, and effective April 1, 2019, the Corporation acquired loans pursuant to the acquisition of Monument. The acquired loans were recorded at their initial fair value, with adjustments made to the gross amortized cost of loans based on movements in interest rates (market rate adjustment) and based on credit fair value adjustments on non-impaired loans and impaired loans. In the last three quarters of 2019 and year ended December 31, 2020, the Corporation recognized amortization and accretion of a portion of the market rate adjustments and credit adjustments on non-impaired (performing) loans, and a partial recovery of purchased credit impaired (PCI) loans. For the years ended December 31, 2020 and 2019, adjustments to the initial market rate and credit fair value adjustments of performing loans were recognized as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, ​ December 31, ​ ​ 2020 ​ 2019 Market Rate Adjustment ​ ​ Adjustments to gross amortized cost of loans at beginning of period ​ $ (1,415) ​ $ 0 Market rate adjustment recorded in acquisition ​ ​ 2,909 ​ ​ (1,807) (Amortization) accretion recognized in interest income ​ ​ (776) ​ ​ 392 Adjustments to gross amortized cost of loans at end of period ​ $ 718 ​ $ (1,415) Credit Adjustment on Non-impaired Loans ​ ​ ​ ​ ​ ​ Adjustments to gross amortized cost of loans at beginning of period ​ $ (1,216) ​ $ 0 Credit adjustment recorded in acquisition ​ ​ (7,219) ​ ​ (1,914) Accretion recognized in interest income ​ 2,456 ​ 698 Adjustments to gross amortized cost of loans at end of period ​ $ (5,979) ​ $ (1,216) ​ ​ The following table presents the components of the purchase accounting adjustments related to the PCI loans acquired from Covenant as of July 1, 2020: ​ ​ ​ ​ ​ (In Thousands) ​ July 1, 2020 Contractually required principal at acquisition ​ $ 10,114 Non-accretable discount ​ (3,466) Expected cash flows ​ $ 6,648 ​ A summary of PCI loans held at December 31, 2020 and December 31, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, ​ December 31, ​ 2020 2019 Outstanding balance ​ $ 10,316 ​ $ 759 Carrying amount ​ 6,841 ​ 441 ​ Transactions within the allowance for loan losses, summarized by segment and class, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ ​ ​ ​ ​ December 31, Year Ended December 31, 2020 ​ 2019 ​ ​ ​ ​ ​ ​ ​ Provision ​ 2020 (In Thousands) ​ Balance ​ Charge-offs ​ Recoveries ​ (Credit) ​ Balance Allowance for Loan Losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage: ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 3,405 ​ $ 0 ​ $ 39 ​ $ 80 ​ $ 3,524 Residential mortgage loans - junior liens ​ 384 ​ 0 ​ 1 ​ (36) ​ 349 Home equity lines of credit ​ 276 ​ 0 ​ 4 ​ 1 ​ 281 1-4 Family residential construction ​ 117 ​ 0 ​ 0 ​ (18) ​ 99 Total residential mortgage ​ 4,182 ​ 0 ​ 44 ​ 27 ​ 4,253 Commercial: ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 1,921 ​ 0 ​ 0 ​ 1,130 ​ 3,051 Commercial and industrial ​ 1,391 ​ (2,236) ​ 16 ​ 3,074 ​ 2,245 Commercial construction and land ​ 966 ​ (107) ​ 0 ​ (405) ​ 454 Loans secured by farmland ​ 158 ​ 0 ​ 0 ​ (38) ​ 120 Multi-family (5 or more) residential ​ 156 ​ 0 ​ 0 ​ 80 ​ 236 Agricultural loans ​ 41 ​ 0 ​ 0 ​ (7) ​ 34 Other commercial loans ​ 155 ​ 0 ​ 0 ​ 13 ​ 168 Total commercial ​ 4,788 ​ (2,343) ​ 16 ​ 3,847 ​ 6,308 Consumer ​ 281 ​ (122) ​ 41 ​ 39 ​ 239 Unallocated ​ 585 ​ 0 ​ 0 ​ 0 ​ 585 Total Allowance for Loan Losses ​ $ 9,836 ​ $ (2,465) ​ $ 101 ​ $ 3,913 ​ $ 11,385 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ ​ ​ ​ ​ December 31, Year Ended December 31, 2019 ​ 2018 ​ ​ ​ ​ ​ ​ ​ Provision ​ 2019 (In Thousands) ​ Balance ​ Charge-offs ​ Recoveries ​ (Credit) ​ Balance Allowance for Loan Losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage: ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 3,156 ​ $ (166) ​ $ 4 ​ $ 411 ​ $ 3,405 Residential mortgage loans - junior liens ​ 325 ​ (24) ​ 2 ​ 81 ​ 384 Home equity lines of credit ​ 302 ​ 0 ​ 5 ​ (31) ​ 276 1-4 Family residential construction ​ 203 ​ 0 ​ 1 ​ (87) ​ 117 Total residential mortgage ​ 3,986 ​ (190) ​ 12 ​ 374 ​ 4,182 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 2,538 ​ 0 ​ 0 ​ (617) ​ 1,921 Commercial and industrial ​ 1,553 ​ (6) ​ 6 ​ (162) ​ 1,391 Commercial construction and land ​ 110 ​ 0 ​ 0 ​ 856 ​ 966 Loans secured by farmland ​ 102 ​ 0 ​ 0 ​ 56 ​ 158 Multi-family (5 or more) residential ​ 114 ​ 0 ​ 0 ​ 42 ​ 156 Agricultural loans ​ 46 ​ 0 ​ 0 ​ (5) ​ 41 Other commercial loans ​ 128 ​ 0 ​ 0 ​ 27 ​ 155 Total commercial ​ 4,591 ​ (6) ​ 6 ​ 197 ​ 4,788 Consumer ​ 233 ​ (183) ​ 39 ​ 192 ​ 281 Unallocated ​ 499 ​ 0 ​ 0 ​ 86 ​ 585 Total Allowance for Loan Losses ​ $ 9,309 ​ $ (379) ​ $ 57 ​ $ 849 ​ $ 9,836 ​ For the year ended December 31, 2020, the provision for loan losses was $3,913,000, an increase in expense of $3,064,000 as compared to 2019. The provision included the impact of a $2,219,000 charge-off on a commercial loan of $3,500,000. In total, the provision for 2020 included a net charge of $2,238,000 related to specific loans (net decrease in specific allowances on loans of $126,000 and net charge-offs of $2,364,000) and a $1,675,000 increase in the collectively determined portion of the allowance for loan losses. The increase in the collectively determined portion of the allowance includes the impact of an increase in the net charge-off experience factor for commercial loans and an increase in qualitative factors. In determining the larger loan relationships for detailed assessment under the specific allowance component, the Corporation uses an internal risk rating system. Under the risk rating system, the Corporation classifies problem or potential problem loans as “Special Mention,” “Substandard,” or “Doubtful” on the basis of currently existing facts, conditions and values. Loans that do not currently expose the Corporation to sufficient risk to warrant classification as Substandard or Doubtful, but possess weaknesses that deserve management’s close attention, are deemed to be Special Mention. Substandard loans include those characterized by the distinct possibility that the Corporation will sustain some loss if the deficiencies are not corrected. Loans classified as Doubtful have all the weaknesses inherent in those classified as Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Risk ratings are updated any time that conditions or the situation warrants. Loans not classified are included in the “Pass” column in the table below. ​ The following tables summarize the aggregate credit quality classification of outstanding loans by risk rating as of December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ Purchased ​ ​ (In Thousands) ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ Credit ​ ​ ​ ​ ​ Pass ​ Mention ​ Substandard ​ Doubtful ​ Impaired ​ Total Residential Mortgage: ​ ​ ​ ​ ​ ​ Residential Mortgage loans - first liens ​ $ 516,685 ​ $ 6,192 ​ $ 9,994 ​ $ 0 ​ $ 76 ​ $ 532,947 Residential Mortgage loans - junior liens ​ 26,480 ​ 141 ​ 621 ​ 0 ​ 69 ​ 27,311 Home equity lines of credit ​ 38,529 ​ 59 ​ 713 ​ 0 ​ 0 ​ 39,301 1-4 Family residential construction ​ 20,613 ​ 0 ​ 0 ​ 0 ​ 0 ​ 20,613 Total residential mortgage ​ 602,307 ​ 6,392 ​ 11,328 ​ 0 ​ 145 ​ 620,172 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 494,876 ​ 17,374 ​ 15,262 ​ 0 ​ 4,298 ​ 531,810 Commercial and Industrial ​ 143,500 ​ 8,025 ​ 7,268 ​ 0 ​ 784 ​ 159,577 Small Business Administration - Paycheck Protection Program ​ ​ 132,269 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 132,269 Political subdivisions ​ 53,221 ​ 0 ​ 0 ​ 0 ​ 0 ​ 53,221 Commercial construction and land ​ 42,110 ​ 715 ​ 49 ​ 0 ​ 0 ​ 42,874 Loans secured by farmland ​ 10,473 ​ 405 ​ 858 ​ 0 ​ 0 ​ 11,736 Multi-family (5 or more) residential ​ 50,563 ​ 2,405 ​ 1,229 ​ 0 ​ 1,614 ​ 55,811 Agricultural loans ​ 2,569 ​ 0 ​ 595 ​ 0 ​ 0 ​ 3,164 Other commercial loans ​ 17,289 ​ 0 ​ 0 ​ 0 ​ 0 ​ 17,289 Total commercial ​ 946,870 ​ 28,924 ​ 25,261 ​ 0 ​ 6,696 ​ 1,007,751 Consumer ​ 16,172 ​ 0 ​ 114 ​ 0 ​ 0 ​ 16,286 Totals ​ $ 1,565,349 ​ $ 35,316 ​ $ 36,703 ​ $ 0 ​ $ 6,841 ​ $ 1,644,209 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ Purchased ​ ​ (In Thousands) ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ Credit ​ ​ ​ ​ ​ Pass ​ Mention ​ Substandard ​ Doubtful ​ Impaired ​ Total Residential Mortgage: ​ ​ ​ ​ ​ ​ Residential Mortgage loans - first liens ​ $ 500,963 ​ $ 193 ​ $ 9,324 ​ $ 84 ​ $ 77 ​ $ 510,641 Residential Mortgage loans - junior liens ​ 26,953 ​ 79 ​ 471 ​ 0 ​ 0 ​ 27,503 Home equity lines of credit ​ 33,170 ​ 59 ​ 409 ​ 0 ​ 0 ​ 33,638 1-4 Family residential construction ​ 14,798 ​ 0 ​ 0 ​ 0 ​ 0 ​ 14,798 Total residential mortgage ​ 575,884 ​ 331 ​ 10,204 ​ 84 ​ 77 ​ 586,580 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 294,397 ​ 4,773 ​ 1,693 ​ 0 ​ 364 ​ 301,227 Commercial and Industrial ​ 114,293 ​ 9,538 ​ 2,543 ​ 0 ​ 0 ​ 126,374 Political subdivisions ​ 53,570 ​ 0 ​ 0 ​ 0 ​ 0 ​ 53,570 Commercial construction and land ​ 32,224 ​ 0 ​ 1,331 ​ 0 ​ 0 ​ 33,555 Loans secured by farmland ​ 6,528 ​ 4,681 ​ 1,042 ​ 0 ​ 0 ​ 12,251 Multi-family (5 or more) residential ​ 30,160 ​ 0 ​ 910 ​ 0 ​ 0 ​ 31,070 Agricultural loans ​ 3,343 ​ 335 ​ 641 ​ 0 ​ 0 ​ 4,319 Other commercial loans ​ 16,416 ​ 0 ​ 119 ​ 0 ​ 0 ​ 16,535 Total commercial ​ 550,931 ​ 19,327 ​ 8,279 ​ 0 ​ 364 ​ 578,901 Consumer ​ 16,720 ​ 0 ​ 21 ​ 0 ​ 0 ​ 16,741 Totals ​ $ 1,143,535 ​ $ 19,658 ​ $ 18,504 ​ $ 84 ​ $ 441 ​ $ 1,182,222 ​ ​ The following tables present a summary of loan balances and the related allowance for loan losses summarized by portfolio segment and class for each impairment method used as of December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 Loans: ​ Allowance for Loan Losses: (In Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ Evaluated Evaluated Totals Evaluated Evaluated Totals Residential mortgage: ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 2,385 ​ $ 530,562 ​ $ 532,947 ​ $ 9 ​ $ 3,515 ​ $ 3,524 Residential mortgage loans - junior liens ​ 414 ​ 26,897 ​ 27,311 ​ 153 ​ 196 ​ 349 Home equity lines of credit ​ 0 ​ 39,301 ​ 39,301 ​ 0 ​ 281 ​ 281 1-4 Family residential construction ​ 0 ​ 20,613 ​ 20,613 ​ 0 ​ 99 ​ 99 Total residential mortgage ​ 2,799 ​ 617,373 ​ 620,172 ​ 162 ​ 4,091 ​ 4,253 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 11,962 ​ 519,848 ​ 531,810 ​ 692 ​ 2,359 ​ 3,051 Commercial and industrial ​ 1,359 ​ 158,218 ​ 159,577 ​ 71 ​ 2,174 ​ 2,245 Small Business Administration - Paycheck Protection Program ​ 0 ​ 132,269 ​ 132,269 ​ 0 ​ 0 ​ 0 Political subdivisions ​ 0 ​ 53,221 ​ 53,221 ​ 0 ​ 0 ​ 0 Commercial construction and land ​ 0 ​ 42,874 ​ 42,874 ​ 0 ​ 454 ​ 454 Loans secured by farmland ​ 84 ​ 11,652 ​ 11,736 ​ 0 ​ 120 ​ 120 Multi-family (5 or more) residential ​ 1,614 ​ 54,197 ​ 55,811 ​ 0 ​ 236 ​ 236 Agricultural loans ​ 0 ​ 3,164 ​ 3,164 ​ 0 ​ 34 ​ 34 Other commercial loans ​ 0 ​ 17,289 ​ 17,289 ​ 0 ​ 168 ​ 168 Total commercial ​ 15,019 ​ 992,732 ​ 1,007,751 ​ 763 ​ 5,545 ​ 6,308 Consumer ​ 0 ​ 16,286 ​ 16,286 ​ 0 ​ 239 ​ 239 Unallocated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 585 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 17,818 ​ $ 1,626,391 ​ $ 1,644,209 ​ $ 925 ​ $ 9,875 ​ $ 11,385 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 Loans: ​ Allowance for Loan Losses: (In Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ Evaluated Evaluated Totals Evaluated Evaluated Totals Residential mortgage: ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 1,023 ​ $ 509,618 ​ $ 510,641 ​ $ 0 ​ $ 3,405 ​ $ 3,405 Residential mortgage loans - junior liens ​ 368 ​ 27,135 ​ 27,503 ​ 176 ​ 208 ​ 384 Home equity lines of credit ​ 0 ​ 33,638 ​ 33,638 ​ 0 ​ 276 ​ 276 1-4 Family residential construction ​ 0 ​ 14,798 ​ 14,798 ​ 0 ​ 117 ​ 117 Total residential mortgage ​ 1,391 ​ 585,189 ​ 586,580 ​ 176 ​ 4,006 ​ 4,182 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 684 ​ 300,543 ​ 301,227 ​ 0 ​ 1,921 ​ 1,921 Commercial and industrial ​ 1,467 ​ 124,907 ​ 126,374 ​ 149 ​ 1,242 ​ 1,391 Political subdivisions ​ 0 ​ 53,570 ​ 53,570 ​ 0 ​ 0 ​ 0 Commercial construction and land ​ 1,261 ​ 32,294 ​ 33,555 ​ 678 ​ 288 ​ 966 Loans secured by farmland ​ 607 ​ 11,644 ​ 12,251 ​ 48 ​ 110 ​ 158 Multi-family (5 or more) residential ​ 0 ​ 31,070 ​ 31,070 ​ 0 ​ 156 ​ 156 Agricultural loans ​ 76 ​ 4,243 ​ 4,319 ​ 0 ​ 41 ​ 41 Other commercial loans ​ 0 ​ 16,535 ​ 16,535 ​ 0 ​ 155 ​ 155 Total commercial ​ 4,095 ​ 574,806 ​ 578,901 ​ 875 ​ 3,913 ​ 4,788 Consumer ​ 0 ​ 16,741 ​ 16,741 ​ 0 ​ 281 ​ 281 Unallocated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 585 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 5,486 ​ $ 1,176,736 ​ $ 1,182,222 ​ $ 1,051 ​ $ 8,200 ​ $ 9,836 ​ Summary information related to impaired loans as of December 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, 2020 ​ December 31, 2019 ​ ​ Unpaid ​ ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ ​ ​ ​ ​ Principal ​ Recorded ​ Related ​ Principal ​ Recorded ​ Related ​ Balance Investment Allowance Balance Investment Allowance With no related allowance recorded: ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 1,248 ​ $ 1,248 ​ $ 0 ​ $ 645 ​ $ 617 ​ $ 0 Residential mortgage loans - junior liens ​ 160 ​ 105 ​ 0 ​ 42 ​ 42 ​ 0 Commercial loans secured by real estate ​ 7,168 ​ 5,398 ​ 0 ​ 684 ​ 684 ​ 0 Commercial and industrial ​ 1,781 ​ 1,287 ​ 0 ​ 563 ​ 563 ​ 0 Loans secured by farmland ​ 84 ​ 84 ​ 0 ​ 129 ​ 129 ​ 0 Multi-family (5 or more) residential ​ ​ 2,770 ​ ​ 1,614 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 0 Agricultural loans ​ 0 ​ 0 ​ 0 ​ 76 ​ 76 ​ 0 Total with no related allowance recorded ​ 13,211 ​ 9,736 ​ 0 ​ 2,139 ​ 2,111 ​ 0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ With a related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ 1,200 ​ 1,200 ​ 9 ​ 406 ​ 406 ​ 0 Residential mortgage loans - junior liens ​ 309 ​ 309 ​ 153 ​ 326 ​ 326 ​ 176 Commercial loans secured by real estate ​ ​ 6,501 ​ ​ 6,501 ​ ​ 691 ​ ​ 0 ​ ​ 0 ​ ​ 0 Commercial and industrial ​ 72 ​ 72 ​ 72 ​ 904 ​ 904 ​ 149 Construction and other land loans ​ 0 ​ 0 ​ 0 ​ 1,261 ​ 1,261 ​ 678 Loans secured by farmland ​ 0 ​ 0 ​ 0 ​ 478 ​ 478 ​ 48 Total with a related allowance recorded ​ 8,082 ​ 8,082 ​ 925 ​ 3,375 ​ 3,375 ​ 1,051 Total ​ $ 21,293 ​ $ 17,818 ​ $ 925 ​ $ 5,514 ​ $ 5,486 ​ $ 1,051 ​ In the table immediately above, loans to two borrowers are presented under the Residential mortgage loans – first liens and Residential mortgage loans – junior liens classes. Each of these loans is collateralized by one property, and the allowance associated with each of these loans was determined based on an analysis of the total amounts of the Corporation’s exposure in comparison to the estimated net proceeds if the Corporation were to sell the property. The total allowance related to these two borrowers was $153,000 at December 31, 2020 and $176,000 at December 31, 2019. The average balance of impaired loans and interest income recognized on impaired loans is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Interest Income Recognized on ​ ​ Average Investment in ​ on Impaired Loans ​ ​ Impaired Loans ​ on a Cash Basis ​ ​ Year Ended December 31, ​ Year Ended December 31, ​ ​ 2020 ​ 2019 2020 2019 Residential mortgage: ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first lien ​ $ 1,853 ​ $ 1,440 ​ $ 116 ​ $ 87 Residential mortgage loans - junior lien ​ ​ 392 ​ ​ 288 ​ 22 ​ 12 Home equity lines of credit ​ ​ 57 ​ ​ 26 ​ 3 ​ 4 Total residential mortgage ​ ​ 2,302 ​ ​ 1,754 ​ 141 ​ 103 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ ​ 5,266 ​ ​ 1,562 ​ 258 ​ 19 Commercial and industrial ​ ​ 2,542 ​ ​ 1,186 ​ 34 ​ 25 Commercial construction and land ​ ​ 521 ​ ​ 556 ​ 15 ​ 71 Loans secured by farmland ​ ​ 319 ​ ​ 1,276 ​ 27 ​ 49 Multi-family (5 or more) residential ​ ​ 202 ​ ​ 0 ​ ​ 0 ​ ​ 0 Agricultural loans ​ ​ 76 ​ ​ 399 ​ 4 ​ 31 Other commercial loans ​ ​ 18 ​ ​ 20 ​ 1 ​ 4 Total commercial ​ ​ 8,944 ​ ​ 4,999 ​ 339 ​ 199 Consumer ​ ​ 0 ​ ​ 3 ​ 0 ​ 0 Total ​ $ 11,246 ​ $ 6,756 ​ $ 480 ​ $ 302 ​ The breakdown by portfolio segment and class of nonaccrual loans and loans past due ninety days or more and still accruing is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, 2020 ​ December 31, 2019 ​ ​ Past Due ​ ​ ​ ​ Past Due ​ ​ ​ ​ ​ 90+ Days and ​ ​ ​ ​ 90+ Days and ​ ​ ​ ​ Accruing Nonaccrual Accruing Nonaccrual Residential mortgage: ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 838 ​ $ 6,387 ​ $ 878 ​ $ 4,679 Residential mortgage loans - junior liens ​ 52 ​ 378 ​ 53 ​ 326 Home equity lines of credit ​ 233 ​ 299 ​ 71 ​ 73 Total residential mortgage ​ 1,123 ​ 7,064 ​ 1,002 ​ 5,078 Commercial: ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 395 ​ 11,550 ​ 107 ​ 1,148 Commercial and industrial ​ 142 ​ 970 ​ 15 ​ 1,051 Commercial construction and land ​ 0 ​ 49 ​ 0 ​ 1,311 Loans secured by farmland ​ 188 ​ 84 ​ 43 ​ 565 Multi-family (5 or more) residential ​ ​ 0 ​ ​ 1,614 ​ ​ 0 ​ ​ 0 Other commercial ​ 71 ​ 0 ​ 0 ​ 49 Total commercial ​ 796 ​ 14,267 ​ 165 ​ 4,124 Consumer ​ 56 ​ 85 ​ 40 ​ 16 Totals ​ $ 1,975 ​ $ 21,416 ​ $ 1,207 ​ $ 9,218 ​ The amounts shown in the table immediately above include loans classified as troubled debt restructurings (described in more detail below), if such loans are past due ninety days or more or nonaccrual. PCI loans with a total recorded investment of $6,841,000 at December 31, 2020 and $441,000 at December 31, 2019 are classified as nonaccrual. The table below presents a summary of the contractual aging of loans as of December 31, 2020 and 2019. Loans modified under the Corporation’s program designed to work with clients impacted by COVID-19, as described above, are included in the current and past due less than 30 days category in the table that follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ As of December 31, 2020 ​ As of December 31, 2019 ​ Current & ​ ​ ​ ​ ​ ​ Current & ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ ​ ​ 30 Days ​ Days ​ Days ​ Total ​ 30 Days ​ Days ​ Days ​ Total Residential mortgage: ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 523,191 ​ $ 5,703 ​ $ 4,053 ​ $ 532,947 ​ $ 499,024 ​ $ 7,839 ​ $ 3,778 ​ $ 510,641 Residential mortgage loans - junior liens ​ 27,009 ​ 111 ​ 191 ​ 27,311 ​ 27,041 ​ 83 ​ 379 ​ 27,503 Home equity lines of credit ​ 38,919 ​ 101 ​ 281 ​ 39,301 ​ 33,115 ​ 452 ​ 71 ​ 33,638 1-4 Family residential construction ​ 20,457 ​ 156 ​ 0 ​ 20,613 ​ 14,758 ​ 40 ​ 0 ​ 14,798 Total residential mortgage ​ 609,576 ​ 6,071 ​ 4,525 ​ 620,172 ​ 573,938 ​ 8,414 ​ 4,228 ​ 586,580 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 529,998 ​ 66 ​ 1,746 ​ 531,810 ​ 299,640 ​ 737 ​ 850 ​ 301,227 Commercial and industrial ​ 158,523 ​ 55 ​ 999 ​ 159,577 ​ 126,221 ​ 16 ​ 137 ​ 126,374 Small Business Administration - Paycheck Protection Program ​ ​ 132,269 ​ ​ 0 ​ ​ 0 ​ ​ 132,269 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 0 Political subdivisions ​ 53,221 ​ 0 ​ 0 ​ 53,221 ​ 53,570 ​ 0 ​ 0 ​ 53,570 Commercial construction and land ​ 42,590 ​ 284 ​ 0 ​ 42,874 ​ 33,505 ​ 0 ​ 50 ​ 33,555 Loans secured by farmland ​ 11,419 ​ 95 ​ 222 ​ 11,736 ​ 11,455 ​ 666 ​ 130 ​ 12,251 Multi-family (5 or more) residential ​ 53,860 ​ 1,951 ​ 0 ​ 55,811 ​ 31,070 ​ 0 ​ 0 ​ 31,070 Agricultural loans ​ 3,091 ​ 2 ​ 71 ​ 3,164 ​ 4,318 ​ 1 ​ 0 ​ 4,319 Other commercial loans ​ 17,289 ​ 0 ​ 0 ​ 17,289 ​ 16,535 ​ 0 ​ 0 ​ 16,535 Total commercial ​ 1,002,260 ​ 2,453 ​ 3,038 ​ 1,007,751 ​ 576,314 ​ 1,420 ​ 1,167 ​ 578,901 Consumer ​ 16,063 ​ 83 ​ 140 ​ 16,286 ​ 16,496 ​ 189 ​ 56 ​ 16,741 Totals ​ $ 1,627,899 ​ $ 8,607 ​ $ 7,703 ​ $ 1,644,209 ​ $ 1,166,748 ​ $ 10,023 ​ $ 5,451 ​ $ 1,182,222 ​ Nonaccrual loans are included in the contractual aging immediately above. A summary of the contractual aging of nonaccrual loans at December 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Current & ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ 30 Days Days Days Total December 31, 2020 Nonaccrual Totals ​ $ 12,999 ​ $ 2,689 ​ $ 5,728 ​ $ 21,416 December 31, 2019 Nonaccrual Totals ​ $ 3,840 ​ $ 1,134 ​ $ 4,244 ​ $ 9,218 ​ Loans whose terms are modified are classified as TDRs if the Corporation grants such borrowers concessions and it is deemed that those borrowers are experiencing financial difficulty. Loans classified as TDRs are designated as impaired and reviewed each quarter to determine if a specific allowance for loan losses is required. Loans deferred under COVID-19 CARES Act Section 4013 are not classified as TDRs as they meet COVID-19 relief guidance. The outstanding balance of loans subject to TDRs, as well as the contractual aging information at December 31, 2020 and 2019 is as follows: ​ Troubled Debt Restructurings (TDRs): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Current & ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ ​ ​ 30 Days Days Days Nonaccrual Total December 31, 2020 Totals ​ $ 166 ​ $ 0 ​ $ 418 ​ $ 6,867 ​ $ 7,451 December 31, 2019 Totals ​ $ 889 ​ $ 0 ​ $ 0 ​ $ 1,737 ​ $ 2,626 ​ At December 31, 2020 and 2019, there were no commitments to loan additional funds to borrowers whose loans have been classified as TDRs. A summary of TDRs that occurred during 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Balances in Thousands) ​ 2020 2019 ​ ​ Post- ​ Post- ​ ​ Number ​ Modification Number ​ Modification ​ ​ of ​ Recorded of ​ Recorded ​ ​ Loans ​ Investment Loans ​ Investment Residential mortgage - junior liens: ​ ​ ​ Reduced monthly payments and extended maturity date 0 ​ $ 0 ​ 1 ​ $ 18 New loan at lower than risk-adjusted market rate to borrower from whom short sale of other collateral was accepted 1 ​ 30 ​ 0 ​ 0 Commercial loans secured by real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Inter

BANK PREMISES AND EQUIPMENT

BANK PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2020
BANK PREMISES AND EQUIPMENT
Property, Plant and Equipment Disclosure [Text Block]	9. BANK PREMISES AND EQUIPMENT ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, (In Thousands) ​ 2020 ​ 2019 Land ​ $ 3,826 ​ $ 3,199 Buildings and improvements ​ ​ 33,058 ​ ​ 28,403 Furniture and equipment ​ ​ 15,235 ​ ​ 13,618 Construction in progress ​ ​ 8 ​ ​ 1,655 Total ​ ​ 52,127 ​ ​ 46,875 Less: accumulated depreciation ​ ​ (30,601) ​ ​ (29,705) Net ​ $ 21,526 ​ $ 17,170 ​ Depreciation expense is included in the following line items of the consolidated statements of income: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ 2020 ​ 2019 Occupancy expense ​ $ 857 ​ $ 775 Furniture and equipment expense ​ ​ 738 ​ ​ 692 Data processing expenses ​ ​ 338 ​ ​ 239 Telecommunications expenses ​ ​ 48 ​ ​ 43 Total ​ $ 1,981 ​ $ 1,749 ​

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS, NET	12 Months Ended
	Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS, NET
GOODWILL AND OTHER INTANGIBLE ASSETS, NET	10. GOODWILL AND OTHER INTANGIBLE ASSETS, NET Information related to the core deposit intangibles is as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, ​ 2020 ​ 2019 Gross amount ​ $ 6,639 ​ $ 3,495 Accumulated amortization ​ (2,788) ​ (2,248) Net ​ $ 3,851 ​ $ 1,247 ​ Amortization expense related to core deposit intangibles is included in other noninterest expense in the consolidated statements of income, as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Year Ended ​ ​ December 31, ​ December 31, ​ ​ 2020 ​ 2019 Amortization expense ​ $ 540 ​ $ 223 ​ In 2020, amortization expense included $292,000 related to the Covenant acquisition and $248,000 related to the Monument acquisition as described in Note 3. In 2019, amortization expense included $214,000 related to the Monument acquisition and $9,000 related to a previous acquisition. The amount of amortization expense to be recognized in each of the ensuing five years is as follows: ​ ​ ​ ​ ​ (In Thousands) ​ 2021 ​ $ 535 2022 ​ 439 2023 ​ 408 2024 ​ 390 2025 ​ 424 ​ ​ Goodwill represents the excess of the cost of acquisitions over the fair value of the net assets acquired. Changes in the carrying amount of goodwill are summarized in the following table: ​ ​ ​ ​ ​ ​ ​ (In Thousands) Year Ended ​ December 31, ​ December 31, ​ 2020 ​ 2019 Balance, beginning of period $ 28,388 ​ $ 11,942 Goodwill arising in business combination ​ 24,117 ​ ​ 16,446 Balance, end of period $ 52,505 ​ $ 28,388 ​ In testing goodwill for impairment at December 31, 2020, the Corporation by-passed performing a qualitative assessment and performed a quantitative assessment based on comparison of the Corporation’s market capitalization to its stockholders’ equity, resulting in the determination that the fair value of its reporting unit, its community banking operation, exceeded its carrying amount. Accordingly, there was no goodwill impairment at December 31, 2020. There were no goodwill impairment charges recorded in the years ended December 31, 2020 and 2019.

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
DEPOSITS	11. DEPOSITS At December 31, 2020, the scheduled maturities of time deposits are as follows: ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ 2021 ​ $ 262,358 2022 ​ ​ 76,447 2023 ​ ​ 27,730 2024 ​ ​ 12,621 2025 ​ ​ 11,192 2026 ​ ​ 59 Total ​ $ 390,407 ​ Time deposits of more than $250,000 totaled $103,024,000 at December 31, 2020 and $84,476,000 at December 31, 2019. As of December 31, 2020, the remaining maturities or time to next re-pricing of time deposits more than $250,000 was as follows: ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Three months or less ​ $ 25,566 Over 3 months through 12 months ​ ​ 54,883 Over 1 year through 3 years ​ ​ 15,574 Over 3 years ​ ​ 7,001 Total ​ $ 103,024 ​

BORROWED FUNDS AND SUBORDINATED

BORROWED FUNDS AND SUBORDINATED DEBT	12 Months Ended
	Dec. 31, 2020
BORROWED FUNDS AND SUBORDINATED DEBT
BORROWED FUNDS AND SUBORDINATED DEBT	12. BORROWED FUNDS AND SUBORDINATED DEBT Short-term borrowings (initial maturity within one year) include the following: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 FHLB-Pittsburgh borrowings ​ $ 18,066 ​ $ 84,292 Customer repurchase agreements ​ 1,956 ​ 1,928 Total short-term borrowings ​ $ 20,022 ​ $ 86,220 ​ Short-term borrowings from FHLB-Pittsburgh are as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Overnight borrowing ​ $ 0 ​ $ 64,000 Other short-term advances ​ 18,066 ​ 20,292 Total short-term FHLB-Pittsburgh borrowings ​ $ 18,066 ​ $ 84,292 ​ The overnight borrowing from FHLB-Pittsburgh had an interest rate of 1.81% at December 31, 2019 . The weighted average interest rate on total short-term borrowings outstanding was 0.40% at December 31, 2020 and 1.88% at December 31, 2019. The maximum amount of total short-term borrowings outstanding at any month-end was $56,647,000 in 2020 and $86,220,000 in 2019. The Corporation had available credit with other correspondent banks totaling $45,000,000 at December 31, 2020 and 2019. These lines of credit are primarily unsecured. No amounts were outstanding at December 31, 2020 or 2019. The Corporation has a line of credit with the Federal Reserve Bank of Philadelphia’s Discount Window. At December 31, 2020, the Corporation had available credit in the amount of $14,654,000 on this line with no outstanding advances. At December 31, 2019, the Corporation had available credit in the amount of $14,244,000 on this line with no outstanding advances. As collateral for this line, the Corporation has pledged available-for-sale securities with a carrying value of $15,126,000 at December 31, 2020 and $14,728,000 at December 31, 2019. The FHLB-Pittsburgh loan facility is collateralized by qualifying loans secured by real estate with a book value totaling $1,049,690,000 at December 31, 2020 and $778,877,000 at December 31, 2019. Also, the FHLB-Pittsburgh loan facility requires the Corporation to invest in established amounts of FHLB-Pittsburgh stock. The carrying values of the Corporation’s holdings of FHLB-Pittsburgh stock (included in Other Assets) were $9,720,000 at December 31, 2020 and $10,131,000 at December 31, 2019. The Corporation’s total credit facility with FHLB-Pittsburgh was $771,199,000 at December 31, 2020, including an unused (available) amount of $698,977,000. At December 31, 2019, the Corporation’s total credit facility with FHLB-Pittsburgh was $552,546,000, including an unused (available) amount of $416,127,000. The Corporation engages in repurchase agreements with certain commercial customers. These agreements provide that the Corporation sells specified investment securities to the customers on an overnight basis and repurchases them on the following business day. The weighted average rate paid by the Corporation on customer repurchase agreements was 0.10%at December 31, 2020 and December 31, 2019. The carrying value of the underlying securities was $1,980,000 at December 31, 2020 and $1,951,000 at December 31, 2019. LONG-TERM BORROWINGS Long-term borrowings from FHLB-Pittsburgh are as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Loans matured in 2020 with a weighted-average rate of 2.71% ​ $ 0 ​ $ 5,069 Loans maturing in 2021 with a weighted-average rate of 1.36% ​ ​ 26,098 ​ ​ 6,000 Loans maturing in 2022 with a weighted-average rate of 0.60% ​ ​ 15,682 ​ ​ 20,000 Loans maturing in 2023 with a weighted-average rate of 0.73% ​ ​ 7,224 ​ ​ 20,500 Loans maturing in 2024 with a weighted-average rate of 0.75% ​ ​ 5,137 ​ ​ 0 Loan maturing in 2025 with a rate of 4.91% ​ ​ 467 ​ ​ 558 Total long-term FHLB-Pittsburgh borrowings ​ $ 54,608 ​ $ 52,127 Note: Weighted-average rates are presented as of December 31, 2020. SUBORDINATED DEBT At December 31, 2020 and 2019, outstanding subordinated debt agreements are as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Agreements with an aggregate par value of $8,000,000; bearing interest at 6.25%; maturing in June 2026 and redeemable at par in June 2021 ​ $ 8,027 ​ $ 0 Agreements with an aggregate par value of $6,500,000; bearing interest at 6.50%; maturing in April 2027 and redeemable at par in April 2022 ​ ​ 6,500 ​ ​ 6,500 Agreement with a par value of $2,000,000; bearing interest at 6.50%; maturing in July 2027 and redeemable at par in July 2022 ​ ​ 2,026 ​ ​ 0 Total carrying value ​ $ 16,553 ​ $ 6,500 ​

EMPLOYEE AND POSTRETIREMENT BEN

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS	12 Months Ended
	Dec. 31, 2020
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS	13. EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS DEFINED BENEFIT PLANS The Corporation sponsors a defined benefit health care plan that provides postretirement medical benefits and life insurance to employees who meet certain age and length of service requirements. Full-time employees no longer accrue service time toward the Corporation-subsidized portion of the medical benefits. The plan contains a cost-sharing feature which causes participants to pay for all future increases in costs related to benefit coverage. Accordingly, actuarial assumptions related to health care cost trend rates do not significantly affect the liability balance at December 31, 2020 and December 31, 2019 and are not expected to significantly affect the Corporation’s future expenses. The Corporation uses a December 31 measurement date for the postretirement plan. In an acquisition in 2007, the Corporation assumed the Citizens Trust Company Retirement Plan, a defined benefit pension plan. This plan covers certain employees who were employed by Citizens Trust Company on December 31, 2002, when the plan was amended to discontinue admittance of any future participant and to freeze benefit accruals. Information related to the Citizens Trust Company Retirement Plan has been included in the tables that follow. The Corporation uses a December 31 measurement date for this plan. The following table shows the funded status of the defined benefit plans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Postretirement (In Thousands) 2020 2019 2020 2019 CHANGE IN BENEFIT OBLIGATION: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Benefit obligation at beginning of year ​ $ 976 ​ $ 870 ​ $ 1,326 ​ $ 1,349 Service cost ​ 0 ​ 0 ​ 46 ​ 33 Interest cost ​ 23 ​ 28 ​ 39 ​ 50 Plan participants' contributions ​ 0 ​ 0 ​ 185 ​ 184 Actuarial loss (gain) ​ 108 ​ 91 ​ 11 ​ (63) Benefits paid ​ (6) ​ (13) ​ (260) ​ (227) Benefit obligation at end of year ​ $ 1,101 ​ $ 976 ​ $ 1,347 ​ $ 1,326 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ CHANGE IN PLAN ASSETS: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value of plan assets at beginning of year ​ $ 971 ​ $ 847 ​ $ 0 ​ $ 0 Actual return on plan assets ​ 97 ​ 137 ​ 0 ​ 0 Employer contribution ​ 0 ​ 0 ​ 75 ​ 43 Plan participants' contributions ​ 0 ​ 0 ​ 185 ​ 184 Benefits paid ​ (6) ​ (13) ​ (260) ​ (227) Fair value of plan assets at end of year ​ $ 1,062 ​ $ 971 ​ $ 0 ​ $ 0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Funded status at end of year ​ $ (39) ​ $ (5) ​ $ (1,347) ​ $ (1,326) ​ At December 31, 2020 and 2019, the following pension plan and postretirement plan liability amounts were recognized in the consolidated balance sheets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement (In Thousands) 2020 2019 2020 2019 Accrued interest and other liabilities ​ $ 39 ​ $ 5 ​ $ 1,347 ​ $ 1,326 ​ At December 31, 2020 and 2019, the following items included in accumulated other comprehensive income had not been recognized as components of expense: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement (In Thousands) 2020 2019 2020 2019 Prior service cost ​ $ 0 ​ $ 0 ​ $ (217) ​ $ (248) Net actuarial loss (gain) ​ 277 ​ 255 ​ (211) ​ (236) Total ​ $ 277 ​ $ 255 ​ $ (428) ​ $ (484) ​ For the defined benefit pension plan, amortization of the net actuarial loss is expected to be $19,000 in 2021. For the postretirement plan, the estimated amount of prior service cost that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2021 is a reduction in expense of $31,000, and net actuarial gain of $5,000 is expected to be amortized in 2021. The accumulated benefit obligation for the defined benefit pension plan was $1,101,000 at December 31, 2020 and $976,000 at December 31, 2019. The components of net periodic benefit costs from defined benefit plans are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement (In Thousands) 2020 2019 2020 2019 Service cost ​ $ 0 ​ $ 0 ​ $ 46 ​ $ 33 Interest cost ​ 23 ​ 28 ​ 39 ​ 50 Expected return on plan assets ​ (27) ​ (22) ​ 0 ​ 0 Amortization of prior service cost ​ 0 ​ 0 ​ (31) ​ (31) Recognized net actuarial loss (gain) ​ 16 ​ 20 ​ (14) ​ (21) Total net periodic benefit cost ​ $ 12 ​ $ 26 ​ $ 40 ​ $ 31 ​ The weighted-average assumptions used to determine net periodic benefit cost are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement ​ 2020 2019 2020 2019 Citizens Trust Company Retirement Plan and postretirement plan: ​ ​ ​ ​ Discount rate 3.10 % 4.10 % 3.25 % 4.50 % Expected return on plan assets 4.99 % 4.68 % N/A N/A ​ Rate of compensation increase N/A N/A N/A N/A ​ ​ The weighted-average assumptions used to determine benefit obligations as of December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Postretirement ​ ​ 2020 2019 2020 2019 ​ Discount rate 2.30 % 3.10 % 2.50 % 3.25 % Rate of compensation increase N/A N/A N/A N/A ​ ​ Estimated future benefit payments, including only estimated employer contributions for the postretirement plan, which reflect expected future service, are as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Pension Postretirement 2021 ​ $ 499 ​ $ 79 2022 ​ 8 ​ 85 2023 ​ 192 ​ 77 2024 ​ 8 ​ 83 2025 ​ 8 ​ 83 2026-2030 ​ 367 ​ 407 ​ No estimated minimum contribution to the defined benefit pension plan is required in 2021, though the Corporation may make discretionary contributions. The expected return on pension plan assets is a significant assumption used in the calculation of net periodic benefit cost. This assumption reflects the average long-term rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the projected benefit obligation. ​ The fair values of pension plan assets at December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 Mutual funds invested principally in: ​ ​ ​ ​ Cash and cash equivalents 2 % 3 % Debt securities 36 % 38 % Equity securities 51 % 49 % Alternative funds 11 % 10 % Total 100 % 100 % ​ C&N Bank’s Wealth Management Department manages the investment of the pension plan assets. The Plan’s securities include mutual funds invested principally in debt securities, a diversified mix of large, mid- and small-capitalization U.S. stocks, foreign stocks and alternative asset classes such as real estate, commodities, and inflation-protected securities. The fair values of plan assets are determined based on Level 1 inputs (as described in Note 22). The Plan’s assets do not include any shares of the Corporation’s common stock. PROFIT SHARING AND DEFERRED COMPENSATION PLANS The Corporation has a profit sharing plan that incorporates the deferred salary savings provisions of Section 401(k) of the Internal Revenue Code. The Corporation’s matching contributions to the Plan depend upon the tax deferred contributions of employees. The Corporation’s total basic and matching contributions were $1,050,000 in 2020 and $891,000 in 2019. The Corporation has an Employee Stock Ownership Plan (ESOP). Contributions to the ESOP are discretionary, and the ESOP uses funds contributed to purchase Corporation stock for the accounts of ESOP participants. These purchases are made in the market (not directly from the Corporation), and employees are not permitted to purchase Corporation stock under the ESOP. The ESOP includes a diversification feature, which allows participants, upon reaching age 55 and 10 years of service (as defined), to sell up to 50% of their Corporation shares over a period of 6 years. As of December 31, 2020, and 2019, there were no shares allocated for repurchase by the ESOP. Dividends paid on shares held by the ESOP are charged to retained earnings. All Corporation shares owned through the ESOP are included in the calculation of weighted-average shares outstanding for purposes of calculating earnings per share – basic and diluted. The ESOP held 481,478 shares of Corporation stock at December 31, 2020 and 473,171 shares at December 31, 2019, all of which had been allocated to Plan participants. The Corporation’s contributions to the ESOP totaled $912,000 in 2020 and $718,000 in 2019. The Corporation has a nonqualified supplemental deferred compensation arrangement with its key officers. Charges to operating expense for officers’ supplemental deferred compensation were $286,000 in 2020 and $251,000 in 2019. In connection with the Covenant acquisition, the Corporation assumed an obligation to provide a supplemental retirement benefit to a former Covenant executive. Under the terms of the agreement, the executive or his heirs will receive monthly payments totaling $1 million over a 10-year period starting in October 2025. Effective July 1, 2020, the Corporation recorded a liability of $499,000 representing the present value of the obligation prior to the executive fully vesting in the benefit. In 2020, the Corporation recorded expense totaling $366,000 related to this obligation, including: (1) $360,000, which is included in merger-related expenses in the consolidated statements of income, representing the impact of the executive fully vesting upon the change in control, and (2) $6,000, which is included in pensions and other employee benefits in the consolidated statements of income, representing the effective interest cost on the obligation from July 1, 2020 through December 31, 2020. The discount rate used to measure the liability at July 1, 2020 and December 31, 2020 was 1.5%. The balance of the liability at December 31, 2020, which is included in accrued interest and other liabilities in the consolidated balance sheets, is $865,000. The Corporation also has a nonqualified deferred compensation plan that allows selected officers the option to defer receipt of cash compensation, including base salary and any cash bonuses or other cash incentives. This nonqualified deferred compensation plan does not provide for Corporation contributions. STOCK-BASED COMPENSATION PLANS The Corporation has a Stock Incentive Plan for a selected group of senior officers. A total of 850,000 shares of common stock may be issued under the Stock Incentive Plan. Awards may be made under the Stock Incentive Plan in the form of qualified options (“Incentive Stock Options,” as defined in the Internal Revenue Code), nonqualified options, stock appreciation rights or restricted stock. Historically through December 31, 2020, all awards made under this Plan have consisted of Incentive Stock Options or restricted stock. Incentive Stock Options have an exercise price equal to the market value of the stock at the date of grant, vest after 6 months and expire after 10 years. There are 166,603 shares available for issuance under the Stock Incentive Plan as of December 31, 2020. Also, the Corporation has an Independent Directors Stock Incentive Plan. This plan permits awards of nonqualified stock options and/or restricted stock to non-employee directors. A total of 235,000 shares of common stock may be issued under the Independent Directors Stock Incentive Plan. The recipients’ rights to exercise stock options under this plan expire 10 years from the date of grant. The exercise prices of all stock options awarded under the Independent Directors Stock Incentive Plan are equal to market value as of the dates of grant. There are 103,143 shares available for issuance under the Independent Directors Stock Incentive Plan as of December 31, 2020. Total stock-based compensation expense is as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Restricted stock ​ $ 1,050 ​ $ 798 Stock options ​ 0 ​ 0 Total ​ $ 1,050 ​ $ 798 ​ The following summarizes non-vested restricted stock activity for the year ended December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ Average ​ ​ Number ​ Grant Date ​ of Shares Fair Value Outstanding, December 31, 2019 68,200 ​ $ 24.53 Granted 70,940 ​ $ 23.18 Vested (31,908) ​ $ 24.97 Forfeited (5,290) ​ $ 25.09 Outstanding, December 31, 2020 101,942 ​ $ 23.42 ​ Compensation cost related to restricted stock is recognized based on the market price of the stock at the grant date over the vesting period, adjusted for estimated and actual forfeitures. As of December 31, 2020, there was $1,340,000 total unrecognized compensation cost related to restricted stock, which is expected to be recognized over a weighted average period of 1.5 years. In 2020 and 2019, the Corporation awarded shares of restricted stock under the Stock Incentive Plan, as follows: ​ ​ ​ ​ ​ ​ ​ 2020 2019 Time-based awards to independent directors ​ 7,580 ​ 7,620 Time-based awards to employees 45,457 26,827 Performance-based awards to employees 17,903 13,690 Total 70,940 48,137 ​ Time-based restricted stock awards granted under the Independent Directors Stock Incentive Plan in 2020 and 2019 vest over one-year terms. Time-based restricted stock awards granted to employees in 2020 and 2019 vest ratably over three-year terms, subject to continued employment and satisfactory job performance. Performance-based restricted stock awards granted in 2020 and 2019 vest ratably over three-year terms, with vesting contingent upon meeting conditions based on the Corporation’s earnings as specified in the agreements. ​ There were no stock options granted in 2020 or 2019. A summary of stock option activity is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 ​ ​ ​ ​ Weighted ​ ​ ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ Average ​ ​ ​ ​ Exercise ​ ​ ​ Exercise ​ Shares Price Shares Price Outstanding, beginning of year 75,897 ​ $ 18.69 115,714 ​ $ 18.49 Granted 0 ​ ​ 0 ​ Exercised (17,222) ​ $ 18.25 (31,304) ​ $ 17.65 Forfeited (1,564) ​ $ 15.06 0 ​ Expired 0 ​ ​ ​ (8,513) ​ $ 19.88 Outstanding, end of year 57,111 ​ $ 18.92 75,897 ​ $ 18.69 Options exercisable at year-end 57,111 ​ $ 18.92 75,897 ​ $ 18.69 Weighted-average fair value of options forfeited ​ ​ $ 4.26 ​ N/A ​ The weighted-average remaining contractual term of outstanding stock options at December 31, 2020 was 1.9 years. The aggregate intrinsic value of stock options outstanding was $63,000 at December 31, 2020. The total intrinsic value of options exercised was $128,000 in 2020 and $276,000 in 2019. The Corporation has issued shares from treasury stock for almost all stock option exercises through December 31, 2020. Management does not anticipate that stock repurchases will be necessary to accommodate stock option exercises in 2021. In January 2021, the Corporation awarded 63,402 shares of restricted stock under the Stock Incentive Plan and 10,989 shares of restricted stock under the Independent Directors Stock Incentive Plans. The January 2021 restricted stock awards under the Stock Incentive Plan vest ratably over three years. The 2021 restricted stock issued under the Independent Directors Stock Incentive Plan vests over one year. Total estimated stock-based compensation for 2021 is $1,400,000. The restricted stock awards made in January 2021 are not included in the tables above.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
INCOME TAXES	14. INCOME TAXES The net deferred tax asset at December 31, 2020 and 2019 represents the following temporary difference components: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, (In Thousands) 2020 2019 Deferred tax assets: ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ $ 2,154 ​ $ 2,080 Purchase accounting adjustments on loans ​ 1,930 ​ 640 Net operating loss carryforward ​ ​ 896 ​ ​ 0 Operating leases liability ​ ​ 724 ​ ​ 344 Other deferred tax assets ​ 3,089 ​ 2,173 Total deferred tax assets ​ 8,793 ​ 5,237 ​ ​ ​ ​ ​ ​ ​ Deferred tax liabilities: ​ ​ Unrealized holding gains on securities ​ 3,104 ​ 934 Defined benefit plans - ASC 835 ​ 32 ​ 49 Bank premises and equipment ​ 1,216 ​ 763 Core deposit intangibles ​ 840 ​ 272 Right-of-use assets from operating leases ​ ​ 724 ​ ​ 344 Other deferred tax liabilities ​ 172 ​ 257 Total deferred tax liabilities ​ 6,088 ​ 2,619 Deferred tax asset, net ​ $ 2,705 ​ $ 2,618 ​ ​ The provision for income taxes includes the following: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Currently payable ​ $ 4,230 ​ $ 3,618 Tax expense resulting from allocations of certain tax benefits to equity or as a reduction in other assets ​ 121 ​ 115 Deferred ​ (361) ​ 172 Total provision ​ $ 3,990 ​ $ 3,905 ​ A reconciliation of income tax at the statutory rate to the Corporation’s effective rate is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 (Dollars In Thousands) Amount % Amount % Expected provision ​ $ 4,875 21.0 ​ $ 4,916 21.0 Tax-exempt interest income ​ (808) (3.5) ​ (853) (3.6) Increase in cash surrender value and other income from life insurance, net ​ (170) (0.7) ​ (91) (0.4) ESOP Dividends ​ (110) (0.5) ​ (113) (0.5) State income tax, net of Federal benefit ​ 172 0.7 ​ 122 0.5 Other, net ​ 31 0.1 ​ (76) (0.3) Effective income tax provision ​ $ 3,990 17.2 ​ $ 3,905 16.7 ​ In connection with the Covenant merger, the Corporation received a net operating loss (“NOL”) available to be carried forward against future federal taxable income of $4.6 million. Availability of the NOL does not expire; however, the amount that may be offset against taxable income is limited to approximately $563,000 per year and further limited annually to no more than 80% of taxable income without regard to the NOL. At December 31, 2020, the unused amount of the NOL is $4.3 million. The Corporation has no unrecognized tax benefits, nor pending examination issues related to tax positions taken in preparation of its income tax returns. With limited exceptions, the Corporation is no longer subject to examination by the Internal Revenue Service for years prior to 2017.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2020
Notes to Financial Statements
RELATED PARTY TRANSACTIONS	15. RELATED PARTY TRANSACTIONS Loans to executive officers, directors of the Corporation and its subsidiaries and any associates of the foregoing persons are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning New ​ Other Ending (In Thousands) Balance Loans Repayments Changes Balance 13 directors, 9 executive officers 2020 ​ $ 14,455 ​ $ 242 ​ $ (2,150) ​ $ 5,898 ​ $ 18,445 11 directors, 8 executive officers 2019 ​ $ 15,144 ​ $ 1,027 ​ $ (1,850) ​ $ 134 ​ $ 14,455 ​ In the table above, other changes represent net changes in the balance of existing lines of credit and transfers in and out of the related party category. Deposits from related parties held by the Corporation amounted to $13,182,000 at December 31, 2020 and $8,828,000 at December 31, 2019.

OFF-BALANCE SHEET RISK

OFF-BALANCE SHEET RISK	12 Months Ended
	Dec. 31, 2020
OFF-BALANCE SHEET RISK
OFF-BALANCE SHEET RISK	16. OFF-BALANCE SHEET RISK The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financial needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. These instruments involve, to varying degrees, elements of credit, interest rate or liquidity risk in excess of the amount recognized in the consolidated balance sheets. The contract amounts of these instruments express the extent of involvement the Corporation has in particular classes of financial instruments. The Corporation’s exposure to credit loss from nonperformance by the other party to the financial instruments for commitments to extend credit and standby letters of credit is represented by the contractual amount of these instruments. The Corporation uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Financial instruments whose contract amounts represent credit risk at December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Commitments to extend credit ​ $ 317,470 ​ $ 256,896 Standby letters of credit ​ 9,107 ​ 8,446 ​ Commitments to extend credit are legally binding agreements to lend to customers. Commitments generally have fixed expiration dates or other termination clauses and may require payment of fees. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future liquidity requirements. The Corporation evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Corporation, for extensions of credit is based on management’s credit assessment of the counterparty. Standby letters of credit are conditional commitments issued by the Corporation guaranteeing performance by a customer to a third party. Those guarantees are issued primarily to support public and private borrowing arrangements, including commercial paper, bond financing and similar transactions. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. Some of the standby letters of credit are collateralized by real estate or other assets, and others are unsecured. The extent to which proceeds from liquidation of collateral would be expected to cover the maximum potential amount of future payments related to standby letters of credit is not estimable. The Corporation has recorded no liability associated with standby letters of credit as of December 31, 2020 and 2019. Standby letters of credit as of December 31, 2020 expire as follows: ​ ​ ​ ​ ​ Year of Expiration (In Thousands) 2021 ​ $ 8,701 2022 ​ 406 Total ​ $ 9,107 ​

OPERATING LEASE COMMITMENTS AND

OPERATING LEASE COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2020
OPERATING LEASE COMMITMENTS AND CONTINGENCIES
OPERATING LEASE COMMITMENTS AND CONTINGENCIES	17. OPERATING LEASE COMMITMENTS AND CONTINGENCIES Operating Lease Commitments The Corporation leases certain branch locations, office space and equipment. All leases are classified as operating leases. Leases with an initial term of 12 months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the lease term. Certain leases include options to renew, with renewal terms that can extend the lease term from one As shown in the table below, at December 31, 2020, right-of-use assets of $3,446,000 were included in other assets right-of-use asset ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, (In Thousands) 2020 2019 Other assets ​ $ 3,446 ​ $ 1,637 Other liabilities ​ $ 3,446 ​ $ 1,637 ​ In 2020 and 2019, operating lease expenses are included in the line items of the consolidated statements of income: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Occupancy expense, net ​ $ 342 ​ $ 214 Furniture and equipment expense ​ 29 ​ 37 Total ​ $ 371 ​ $ 251 ​ A maturity analysis of the Corporation’s lease liabilities at December 31, 2020 is as follows: ​ (In Thousands) Lease Payments Due ​ ​ ​ ​ ​ 2021 $ 484 2022 ​ 465 2023 ​ 453 2024 ​ 446 2025 ​ 426 Thereafter ​ 1,494 Total lease payments ​ 3,768 Discount on cash flows ​ (322) Total lease liabilities ​ $ 3,446 ​ Litigation Matters ​ In the normal course of business, the Corporation is subject to pending and threatened litigation in which claims for monetary damages are asserted. In management’s opinion, the Corporation’s financial position and results of operations would not be materially affected by the outcome of these legal proceedings. ​ Trust Department Tax Reporting Contingency ​ Estimated losses related to trust department tax compliance matters totaled $571,000 in 2020, up from $12,000 in 2019. These losses are included in other noninterest expense in the consolidated statements of income. The operational losses in 2020 arose mainly from compliance oversight and failure of the trust department to provide timely responses to tax notices which occurred between 2007 and 2019 but were identified in 2020. In 2020, the Corporation made changes in internal controls and personnel responsible for trust department tax administration activities. Management implemented the changes in internal controls and personnel in an effort to mitigate and prevent the likelihood of new instances of non-compliance from trust department tax administration activities. At December 31, 2020, the balance of accrued interest and other liabilities in the consolidated balance sheets includes $322,000 related to specific tax compliance matters that have been identified; however, no estimate can be made of the amount of additional expenses that may be incurred related to these matters.

REGULATORY MATTERS

REGULATORY MATTERS	12 Months Ended
	Dec. 31, 2020
REGULATORY MATTERS
REGULATORY MATTERS	18. REGULATORY MATTERS In August 2018, the Federal Reserve Board issued an interim final rule that expanded applicability of the Board’s small bank holding company policy statement. The interim final rule raised the policy statement’s asset threshold from $1 billion to $3 billion in total consolidated assets for a bank holding company or savings and loan holding company that: (1) is not engaged in significant nonbanking activities; (2) does not conduct significant off-balance sheet activities; and (3) does not have a material amount of debt or equity securities, other than trust-preferred securities, outstanding. The interim final rule provides that, if warranted for supervisory purposes, the Federal Reserve may exclude a company from the threshold increase. Management believes the Corporation meets the conditions of the Federal Reserve’s small bank holding company policy statement and is therefore excluded from consolidated capital requirements at December 31, 2020; however, C&N Bank remains subject to regulatory capital requirements administered by the federal banking agencies. Details concerning capital ratios at December 31, 2020 and December 31, 2019 are presented below. Management believes, as of December 31, 2020, that C&N Bank meets all capital adequacy requirements to which it is subject and maintains a capital conservation buffer (described in more detail below) that allows the Bank to avoid limitations on capital distributions, including dividend payments and certain discretionary bonus payments to executive officers. Further, as reflected in the table below, the Corporation’s and C&N Bank’s capital ratios at December 31, 2020 and December 31, 2019 exceed the Corporation’s Board policy threshold levels. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum To Be Well ​ ​ ​ ​ ​ ​ ​ Minimum ​ Minimum To Maintain ​ Capitalized Under ​ Minimum To Meet ​ ​ ​ ​ ​ Capital ​ Capital Conservation ​ Prompt Corrective ​ the Corporation's ​ ​ Actual ​ Requirement Buffer at Reporting Date ​ Action Provisions ​ Policy Thresholds ​ (Dollars In Thousands) ​ Amount Ratio Amount Ratio Amount Ratio Amount Ratio Amount Ratio ​ December 31, 2020: ​ ​ ​ Total capital to risk-weighted assets: ​ ​ ​ Consolidated ​ $ 260,015 17.49 % N/A N/A N/A N/A N/A N/A ​ $ 156,113 ≥ 1 0 . 5 % C&N Bank ​ 236,943 15.98 % 118,602 ≥ 8 % 155,665 ≥ 1 0 . 5 % 148,252 ≥ 1 0 % 155,665 ≥ 1 0 . 5 % Tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 231,577 15.58 % N/A N/A N/A N/A N/A N/A ​ 126,377 ≥ 8 . 5 % C&N Bank ​ 225,058 15.18 % 88,951 ≥ 6 % 126,015 ≥ 8 . 5 % 118,602 ≥ 8 % 126,015 ≥ 8 . 5 % Common equity tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 231,577 15.58 % N/A N/A N/A N/A N/A N/A ​ 104,075 ≥ 7 % C&N Bank ​ 225,058 15.18 % 66,714 ≥ 4 . 5 % 103,777 ≥ 7 . 0 % 96,364 ≥ 6 . 5 % 103,777 ≥ 7 % Tier 1 capital to average assets: ​ ​ ​ Consolidated ​ 231,577 10.34 % N/A N/A N/A N/A N/A N/A ​ 179,206 ≥ 8 % C&N Bank ​ 225,058 10.12 % 88,959 ≥ 4 % N/A N/A 111,199 ≥ 5 % 177,919 ≥ 8 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019: ​ ​ ​ Total capital to risk-weighted assets: ​ ​ ​ Consolidated ​ $ 228,057 20.70 % N/A N/A N/A N/A N/A N/A ​ $ 115,689 ≥ 1 0 . 5 % C&N Bank ​ 205,863 18.75 % 87,817 ≥ 8 % 115,260 ≥ 1 0 . 5 % 109,771 ≥ 1 0 % 115,260 ≥ 1 0 . 5 % Tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 211,388 19.19 % N/A N/A N/A N/A N/A N/A ​ 93,653 ≥ 8 . 5 % C&N Bank ​ 195,694 17.83 % 65,863 ≥ 6 % 93,306 ≥ 8 . 5 % 87,817 ≥ 8 % 93,306 ≥ 8 . 5 % Common equity tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 211,388 19.19 % N/A N/A N/A N/A N/A N/A ​ 77,126 ≥ 7 % C&N Bank ​ 195,694 17.83 % 49,397 ≥ 4 . 5 % 76,840 ≥ 7 . 0 % 71,351 ≥ 6 . 5 % 76,840 ≥ 7 % Tier 1 capital to average assets: ​ ​ ​ Consolidated ​ 211,388 13.10 % N/A N/A N/A N/A N/A N/A ​ 129,126 ≥ 8 % C&N Bank ​ 195,694 12.24 % 63,940 ≥ 4 % N/A N/A 79,925 ≥ 5 % 127,879 ≥ 8 % ​ Federal regulatory authorities impose a capital rule providing that, to avoid limitations on capital distributions, including dividend payments and certain discretionary bonus payments to executive officers, a banking organization subject to the rule must hold a capital conservation buffer composed of common equity tier 1 capital above its minimum risk-based capital requirements. The buffer is measured relative to risk-weighted assets. At December 31, 2020, the minimum risk-based capital ratios, and the capital ratios including the capital conservation buffer, are as follows: ​ ​ ​ ​ ​ Minimum common equity tier 1 capital ratio 4.5 % Minimum common equity tier 1 capital ratio plus capital conservation buffer 7.0 % Minimum tier 1 capital ratio 6.0 % Minimum tier 1 capital ratio plus capital conservation buffer 8.5 % Minimum total capital ratio 8.0 % Minimum total capital ratio plus capital conservation buffer 10.5 % ​ A banking organization with a buffer greater than 2.5% over the minimum risk-based capital ratios would not be subject to additional limits on dividend payments or discretionary bonus payments; however, a banking organization with a buffer less than 2.5% would be subject to increasingly stringent limitations as the buffer approaches zero. Also, a banking organization is prohibited from making dividend payments or discretionary bonus payments if its eligible retained income is negative in that quarter and its capital conservation buffer ratio was less than 2.5% as of the beginning of that quarter. Eligible net income is defined as net income for the four calendar quarters preceding the current calendar quarter, net of any distributions and associated tax effects not already reflected in net income. A summary of payout restrictions based on the capital conservation buffer is as follows: ​ ​ ​ ​ ​ Capital Conservation Buffer Maximum Payout (as a % of risk-weighted assets) ​ (as a % of eligible retained income) Greater than 2.5% No payout limitation applies ≤2.5% and >1.875% ​ 60% ​ ≤1.875% and >1.25% ​ 40% ​ ≤1.25% and >0.625% ​ 20% ​ ≤0.625% ​ 0% ​ ​ At December 31, 2020, C&N Bank’s Capital Conservation Buffer, determined based on the minimum total capital ratio, was 7.98%. Banking regulators limit the amount of dividends that may be paid by C&N Bank to the Corporation. Retained earnings against which dividends may be paid without prior approval of the banking regulators amounted to approximately $76,527,000 at December 31, 2020, subject to the minimum capital ratio requirements noted above. Restrictions imposed by federal law prohibit the Corporation from borrowing from C&N Bank unless the loans are secured in specific amounts. Such secured loans to the Corporation are generally limited to 10% of C&N Bank’s tangible stockholder’s equity (excluding accumulated other comprehensive income) or $22,509,000 at December 31, 2020.

PARENT COMPANY ONLY

PARENT COMPANY ONLY	12 Months Ended
	Dec. 31, 2020
PARENT COMPANY ONLY
PARENT COMPANY ONLY	19. PARENT COMPANY ONLY The following is condensed financial information for Citizens & Northern Corporation: ​ ​ ​ ​ ​ ​ ​ ​ CONDENSED BALANCE SHEET Dec. 31, Dec. 31, (In Thousands) ​ 2020 ​ 2019 ASSETS ​ ​ Cash ​ $ 7,246 ​ $ 6,485 Investment in subsidiaries: ​ ​ Citizens & Northern Bank ​ 292,455 ​ 228,413 Citizens & Northern Investment Corporation ​ 12,959 ​ 12,353 Bucktail Life Insurance Company ​ 3,804 ​ 3,669 Other assets ​ 4 ​ 109 TOTAL ASSETS ​ $ 316,468 ​ $ 251,029 ​ ​ ​ ​ ​ ​ ​ LIABILITIES AND STOCKHOLDERS' EQUITY ​ ​ Subordinated debt ​ $ 16,553 ​ $ 6,500 Other liabilities ​ 159 ​ 77 Stockholders' equity ​ 299,756 ​ 244,452 TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY ​ $ 316,468 ​ $ 251,029 ​ ​ ​ ​ ​ ​ ​ ​ CONDENSED INCOME STATEMENT ​ ​ ​ (In Thousands) 2020 2019 Dividends from Citizens & Northern Bank ​ $ 38,507 ​ $ 24,600 Expenses ​ (1,488) ​ (1,086) Income before distributions in excess of income from subsidiaries ​ 37,019 ​ 23,514 Distributions in excess of income from subsidiaries ​ (17,797) ​ (4,010) NET INCOME ​ $ 19,222 ​ $ 19,504 ​ ​ ​ ​ ​ ​ ​ ​ CONDENSED STATEMENT OF CASH FLOWS ​ ​ ​ (In Thousands) 2020 2019 CASH FLOWS FROM OPERATING ACTIVITIES: ​ ​ ​ ​ ​ ​ Net income ​ $ 19,222 ​ $ 19,504 Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ Accretion of purchase accounting adjustment ​ ​ (38) ​ ​ 0 Loss on repayment of subordinated debt ​ 0 ​ 10 Distributions in excess of income from subsidiaries ​ 17,797 ​ 4,010 Decrease (increase) in other assets ​ 105 ​ (107) Increase (decrease) in other liabilities ​ 13 ​ (81) Net Cash Provided by Operating Activities ​ 37,099 ​ 23,336 ​ ​ ​ ​ ​ ​ ​ CASH FLOWS FROM INVESTING ACTIVITIES, ​ ​ Net cash used in business combination ​ (21,837) ​ (9,698) ​ ​ ​ ​ ​ ​ ​ CASH FLOWS FROM FINANCING ACTIVITIES: ​ ​ Repayment of subordinated debt ​ 0 ​ (510) Proceeds from sale of treasury stock ​ 131 ​ 198 Purchase of treasury stock ​ (163) ​ (189) Dividends paid ​ (14,469) ​ (14,041) Net Cash Used in Financing Activities ​ (14,501) ​ (14,542) ​ ​ ​ ​ ​ ​ ​ INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS ​ 761 ​ (904) CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR ​ 6,485 ​ 7,389 CASH AND CASH EQUIVALENTS, END OF YEAR ​ $ 7,246 ​ $ 6,485 ​ ​ ​ ​ ​ ​ ​ SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: ​ ​ Investment of net assets acquired in business combination in Citizens & Northern Bank ​ $ 73,426 ​ $ 49,765 Common equity issued in business combination ​ $ 41,429 ​ $ 32,953 Subordinated debt assumed in business combination ​ $ 10,091 ​ $ 7,000 Other liabilities assumed in business combination ​ $ 69 ​ $ 114 Interest paid ​ $ 655 ​ $ 461 ​

SUMMARY OF QUARTERLY CONSOLIDAT

SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA (Unaudited)	12 Months Ended
	Dec. 31, 2020
SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA
SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA	20. SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA (Unaudited) The following table presents summarized quarterly financial data for 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Quarter Ended ​ ​ March 31, ​ June 30, ​ Sept. 30, ​ Dec. 31, (In Thousands Except Per Share Data) (Unaudited) 2020 2020 2020 2020 Interest income ​ $ 17,037 ​ $ 16,513 ​ $ 21,751 ​ $ 21,859 Interest expense ​ 2,755 ​ 2,267 ​ 2,469 ​ 2,104 Net interest income ​ 14,282 ​ 14,246 ​ 19,282 ​ 19,755 Provision (credit) for loan losses ​ 1,528 ​ (176) ​ 1,941 ​ 620 Net interest income after provision (credit) for loan losses ​ 12,754 ​ 14,422 ​ 17,341 ​ 19,135 Other income ​ 5,281 ​ 5,528 ​ 6,970 ​ 6,565 Net gains on available-for-sale debt securities ​ 0 ​ 0 ​ 25 ​ 144 Loss on prepayment of borrowings ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 1,636 Merger-related expenses ​ 141 ​ 983 ​ 6,402 ​ 182 Other expenses ​ 12,912 ​ 12,274 ​ 14,648 ​ 15,775 Income before income tax provision ​ 4,982 ​ 6,693 ​ 3,286 ​ 8,251 Income tax provision ​ 816 ​ 1,255 ​ 438 ​ 1,481 Net income ​ $ 4,166 ​ $ 5,438 ​ $ 2,848 ​ $ 6,770 Net income attributable to common shares ​ $ 4,146 ​ $ 5,405 ​ $ 2,830 ​ $ 6,727 Net income per share – basic ​ $ 0.30 ​ $ 0.39 ​ $ 0.18 ​ $ 0.43 Net income per share – diluted ​ $ 0.30 ​ $ 0.39 ​ $ 0.18 ​ $ 0.43 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 Quarter Ended ​ ​ March 31, ​ June 30, ​ Sept. 30, ​ Dec. 31, ​ 2019 2019 2019 2019 Interest income ​ $ 13,065 ​ $ 17,139 ​ $ 17,277 ​ $ 17,290 Interest expense ​ 1,350 ​ 2,934 ​ 3,000 ​ 2,999 Net interest income ​ 11,715 ​ 14,205 ​ 14,277 ​ 14,291 (Credit) provision for loan losses ​ (957) ​ (4) ​ 1,158 ​ 652 Net interest income after (credit) provision for loan losses ​ 12,672 ​ 14,209 ​ 13,119 ​ 13,639 Other income ​ 4,406 ​ 4,849 ​ 4,963 ​ 5,066 Net gains on available-for-sale debt securities ​ 0 ​ 7 ​ 13 ​ 3 Merger-related expenses ​ 311 ​ 3,301 ​ 206 ​ 281 Other expenses ​ 10,696 ​ 11,422 ​ 11,486 ​ 11,834 Income before income tax provision ​ 6,071 ​ 4,342 ​ 6,403 ​ 6,593 Income tax provision ​ 981 ​ 693 ​ 1,096 ​ 1,135 Net income ​ $ 5,090 ​ $ 3,649 ​ $ 5,307 ​ $ 5,458 Net income attributable to common shares ​ $ 5,063 ​ $ 3,630 ​ $ 5,281 ​ $ 5,431 Net income per share – basic ​ $ 0.41 ​ $ 0.27 ​ $ 0.39 ​ $ 0.40 Net income per share – diluted ​ $ 0.41 ​ $ 0.27 ​ $ 0.39 ​ $ 0.40 ​

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2020
DERIVATIVE FINANCIAL INSTRUMENTS
DERIVATIVE FINANCIAL INSTRUMENTS	​ ​ 21. DERIVATIVE FINANCIAL INSTRUMENTS ​ In connection with the acquisition of Covenant, the Corporation became a party to derivative financial instruments. These financial instruments consist of interest rate swap agreements which contain master netting and collateral provisions designed to protect the party at risk. At July 1, 2020, the aggregate notional amount of commercial loans subject to interest rate swaps was $137,176,000, and the Corporation recorded the fair value of the derivative asset of $7,932,000 and the fair value of the derivative liability of $7,932,000. Interest rate swaps with commercial banking customers were executed to facilitate their respective risk management strategies. Under the terms of these arrangements, the commercial banking customers effectively exchanged their floating interest rate exposures on loans from Covenant (acquired by the Corporation) into fixed interest rate exposures. Those interest rate swaps have been simultaneously economically hedged by offsetting interest rate swaps that Covenant had in place with a third party (assumed by the Corporation), such that the Corporation has effectively exchanged its fixed interest rate exposures for floating rate exposures. These derivatives are not designated as hedges and are not speculative. Rather, these derivatives result from a service provided to certain customers. As the interest rate swaps associated with this program do not meet the hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. At December 31, 2020, the aggregate notional amount of interest rate swaps was $135,740,000. Subsequent to the merger there were no interest rate swaps originated in 2020. There were no gross amounts of interest rate swap-related assets and liabilities not offset in the consolidated balance sheets at December 31, 2020. For the year ended December 31, 2020, the net impact on the consolidated statements of income from interest rate swaps was a reduction in interest income on loans of $698,000. The table below presents the fair value of the Corporation’s derivative financial instruments as well as their classification on the consolidated balance sheets at December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) At December 31, 2020 ​ Asset Derivatives ​ Liability Derivatives ​ Notional ​ Fair ​ Notional ​ Fair ​ Amount ​ Value (1) ​ Amount ​ Value (2) Interest rate swap agreements $ 67,870 ​ $ 6,566 ​ $ 67,870 ​ $ 6,566 ​ (1) Included in other assets in the consolidated balance sheets. (2) Included in accrued interest and other liabilities in the consolidated balance sheets. The Corporation’s agreement with its derivative counterparty provides that if the Corporation defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Corporation could also be declared in default on its derivative obligations. Further, if the Corporation were to fail to maintain its status as a well or adequately capitalized institution, then the counterparty could terminate the derivative positions and the Corporation would be required to settle its obligations under the agreements. Available-for-sale securities with a carrying value of $12,182,000 were pledged as collateral against the Corporation’s liability related to the interest rate swaps at December 31, 2020.

FAIR VALUE MEASUREMENTS AND FAI

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2020
FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS
FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS	22. FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS The Corporation measures certain assets at fair value. Fair value is defined as the price that would be received to sell an asset in an orderly transaction between market participants at the measurement date. FASB ASC topic 820, “Fair Value Measurements and Disclosures” establishes a framework for measuring fair value that includes a hierarchy used to classify the inputs used in measuring fair value. The hierarchy prioritizes the inputs used in determining valuations into three levels. The level in the fair value hierarchy within which the fair value measurement falls is determined based on the lowest level input that is significant to the fair value measurement. The levels of the fair value hierarchy are as follows: Level 1 – Fair value is based on unadjusted quoted prices in active markets that are accessible to the Corporation for identical assets. These generally provide the most reliable evidence and are used to measure fair value whenever available. Level 2 – Fair value is based on significant inputs, other than Level 1 inputs, that are observable either directly or indirectly for substantially the full term of the asset through corroboration with observable market data. Level 2 inputs include quoted market prices in active markets for similar assets, quoted market prices in markets that are not active for identical or similar assets and other observable inputs. Level 3 – Fair value is based on significant unobservable inputs. Examples of valuation methodologies that would result in Level 3 classification include option pricing models, discounted cash flows and other similar techniques. The Corporation monitors and evaluates available data relating to fair value measurements on an ongoing basis and recognizes transfers among the levels of the fair value hierarchy as of the date of an event or change in circumstances that affects the valuation method chosen. Examples of such changes may include the market for a particular asset becoming active or inactive, changes in the availability of quoted prices, or changes in the availability of other market data. At December 31, 2020 and 2019, assets measured at fair value and the valuation methods used are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ Prices ​ Other ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Observable ​ Unobservable ​ Total ​ ​ Markets ​ Inputs ​ Inputs ​ Fair (In Thousands) ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Value Recurring fair value measurements, assets: ​ ​ ​ ​ AVAILABLE-FOR-SALE DEBT SECURITIES: ​ ​ ​ ​ Obligations of the U.S. Treasury ​ $ 0 ​ $ 12,182 ​ $ 0 ​ $ 12,182 Obligations of U.S. Government agencies ​ ​ 0 ​ ​ 26,344 ​ ​ 0 ​ ​ 26,344 Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ Tax-exempt ​ 0 ​ 122,401 ​ 0 ​ 122,401 Taxable ​ 0 ​ 47,452 ​ 0 ​ 47,452 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 0 ​ 38,176 ​ 0 ​ 38,176 Residential collateralized mortgage obligations ​ 0 ​ 57,467 ​ 0 ​ 57,467 Commercial mortgage-backed securities ​ 0 ​ 45,310 ​ 0 ​ 45,310 Total available-for-sale debt securities ​ 0 ​ 349,332 ​ 0 ​ 349,332 Marketable equity security ​ 1,000 ​ 0 ​ 0 ​ 1,000 Servicing rights ​ 0 ​ 0 ​ 1,689 ​ 1,689 Interest rate swap agreements, assets ​ ​ 0 ​ ​ 6,566 ​ ​ 0 ​ ​ 6,566 Total recurring fair value measurements, assets ​ $ 1,000 ​ $ 355,898 ​ $ 1,689 ​ $ 358,587 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recurring fair value measurements, liabilities, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap agreements, liabilities ​ $ 0 ​ $ 6,566 ​ $ 0 ​ $ 6,566 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonrecurring fair value measurements, assets: ​ ​ ​ ​ Impaired loans with a valuation allowance ​ $ 0 ​ $ 0 ​ $ 8,082 ​ $ 8,082 Valuation allowance ​ 0 ​ 0 ​ (925) ​ (925) Impaired loans, net ​ 0 ​ 0 ​ 7,157 ​ 7,157 Foreclosed assets held for sale ​ 0 ​ 0 ​ 1,338 ​ 1,338 Total nonrecurring fair value measurements, assets ​ $ 0 ​ $ 0 ​ $ 8,495 ​ $ 8,495 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ Prices ​ Other ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Observable ​ Unobservable ​ Total ​ ​ Markets ​ Inputs ​ Inputs ​ Fair (In Thousands) ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Value Recurring fair value measurements, assets: ​ ​ ​ ​ AVAILABLE-FOR-SALE DEBT SECURITIES: ​ ​ ​ ​ Obligations of U.S. Government agencies ​ $ 0 ​ $ 17,000 ​ $ 0 ​ $ 17,000 Obligations of states and political subdivisions: ​ ​ ​ ​ Tax-exempt ​ 0 ​ 70,760 ​ 0 ​ 70,760 Taxable ​ 0 ​ 36,303 ​ 0 ​ 36,303 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 0 ​ 59,210 ​ 0 ​ 59,210 Residential collateralized mortgage obligations ​ 0 ​ 114,723 ​ 0 ​ 114,723 Commercial mortgage-backed securities ​ 0 ​ 48,727 ​ 0 ​ 48,727 Total available-for-sale debt securities ​ 0 ​ 346,723 ​ 0 ​ 346,723 Marketable equity security ​ 979 ​ 0 ​ 0 ​ 979 Servicing rights ​ 0 ​ 0 ​ 1,277 ​ 1,277 Total recurring fair value measurements ​ $ 979 ​ $ 346,723 ​ $ 1,277 ​ $ 348,979 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonrecurring fair value measurements, assets ​ ​ ​ ​ Impaired loans with a valuation allowance ​ $ 0 ​ $ 0 ​ $ 3,375 ​ $ 3,375 Valuation allowance ​ 0 ​ 0 ​ (1,051) ​ (1,051) Impaired loans, net ​ 0 ​ 0 ​ 2,324 ​ 2,324 Foreclosed assets held for sale ​ 0 ​ 0 ​ 2,886 ​ 2,886 Total nonrecurring fair value measurements, assets ​ $ 0 ​ $ 0 ​ $ 5,210 ​ $ 5,210 ​ ​ Management’s evaluation and selection of valuation techniques and the unobservable inputs used in determining the fair values of assets valued using Level 3 methodologies include sensitive assumptions. Other market participants might use substantially different assumptions, which could result in calculations of fair values that would be substantially different than the amount calculated by management. The following table shows quantitative information regarding significant techniques and inputs used at December 31, 2020 and 2019 for servicing rights assets measured using unobservable inputs (Level 3 methodologies) on a recurring basis: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value at ​ ​ ​ 12/31/2020 ​ Valuation ​ Unobservable ​ ​ ​ ​ Method or Value As of Asset ​ (In Thousands) ​ Technique ​ Input(s) ​ ​ ​ ​ 12/31/2020 Servicing rights ​ $ 1,689 Discounted cash flow Discount rate ​ 13.00 % Rate used through modeling period ​ ​ ​ ​ ​ Loan prepayment speeds ​ ​ 277.00 % Weighted-average PSA ​ ​ ​ ​ ​ Servicing fees ​ ​ 0.25 % of loan balances ​ ​ ​ ​ ​ ​ ​ ​ ​ 4.00 % of payments are late ​ ​ ​ ​ ​ ​ ​ ​ ​ 5.00 % late fees assessed ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 1.94 ​ Miscellaneous fees per account per month ​ ​ ​ ​ ​ Servicing costs ​ $ 6.00 ​ Monthly servicing cost per account ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 24.00 ​ Additional monthly servicing cost per loan on loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ ​ 1.50 % of loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ 3.00 % annual increase in servicing costs ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value at ​ ​ ​ 12/31/2019 ​ Valuation ​ Unobservable ​ ​ ​ ​ Method or Value As of Asset ​ (In Thousands) ​ Technique ​ Input(s) ​ ​ ​ ​ 12/31/2019 Servicing rights ​ $ 1,277 Discounted cash flow Discount rate ​ 12.50 % Rate used through modeling period ​ ​ ​ ​ ​ Loan prepayment speeds ​ ​ 183.00 % Weighted-average PSA ​ ​ ​ ​ ​ Servicing fees ​ ​ 0.25 % of loan balances ​ ​ ​ ​ ​ ​ ​ ​ ​ 4.00 % of payments are late ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 5.00 % late fees assessed ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 1.94 Miscellaneous fees per account per month ​ ​ ​ ​ ​ ​ Servicing costs ​ $ 6.00 ​ Monthly servicing cost per account ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 24.00 ​ Additional monthly servicing cost per loan on loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1.50 % of loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ 3.00 % annual increase in servicing costs ​ ​ The fair value of servicing rights is affected by expected future interest rates. Increases (decreases) in future expected interest rates tend to increase (decrease) the fair value of the Corporation’s servicing rights because of changes in expected prepayment behavior by the borrowers on the underlying loans. Following is a reconciliation of activity for Level 3 assets (servicing rights) measured at fair value on a recurring basis: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Years Ended December 31, ​ 2020 2019 Servicing rights balance, beginning of period ​ $ 1,277 ​ $ 1,404 Originations of servicing rights ​ 988 ​ 204 Unrealized losses included in earnings ​ (576) ​ (331) Servicing rights balance, end of period ​ $ 1,689 ​ $ 1,277 ​ Loans are classified as impaired when, based on current information and events, it is probable that the Corporation will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Foreclosed assets held for sale consist of real estate acquired by foreclosure. For impaired commercial loans secured by real estate and foreclosed assets held for sale, estimated fair values are determined primarily using values from third-party appraisals. Appraised values are discounted to arrive at the estimated selling price of the collateral, which is considered to be the estimated fair value. The discounts also include estimated costs to sell the property. At December 31, 2020 and 2019, quantitative information regarding significant techniques and inputs used for nonrecurring fair value measurements using unobservable inputs (Level 3 methodologies) are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars In Thousands) ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ Valuation ​ ​ ​ ​ ​ Average ​ ​ Balance at ​ Allowance at ​ Fair Value at ​ Valuation ​ Unobservable ​ Discount at Asset ​ 12/31/2020 ​ 12/31/2020 ​ 12/31/2020 ​ Technique ​ Inputs ​ 12/31/2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired loans: ​ ​ ​ ​ Residential mortgage loans - first and junior liens ​ $ 1,509 ​ $ 162 ​ $ 1,347 Sales comparison Discount to appraised value 31 % Commercial: ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 6,501 ​ 691 ​ 5,810 Sales comparison Discount to appraised value 28 % Commercial and industrial ​ 72 ​ 72 ​ 0 Liquidation of assets Discount to appraised value 100 % Total impaired loans ​ $ 8,082 ​ $ 925 ​ $ 7,157 ​ Foreclosed assets held for sale - real estate: ​ ​ ​ ​ Residential (1-4 family) ​ $ 80 ​ $ 0 ​ $ 80 Sales comparison Discount to appraised value 36 % Commercial real estate ​ 1,258 ​ 0 ​ 1,258 Sales comparison Discount to appraised value 44 % Total foreclosed assets held for sale ​ $ 1,338 ​ $ 0 ​ $ 1,338 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars In Thousands) ​ ​ ​ ​ Weighted ​ ​ ​ ​ Valuation ​ ​ ​ ​ ​ Average ​ ​ Balance at ​ Allowance at ​ Fair Value at ​ Valuation ​ Unobservable ​ Discount at Asset ​ 12/31/2019 ​ 12/31/2019 ​ 12/31/2019 ​ Technique ​ Inputs ​ 12/31/2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired loans: ​ ​ ​ ​ Residential mortgage loans - first and junior liens ​ $ 732 ​ $ 176 ​ $ 556 Sales comparison Discount to appraised value 30 % Commercial: ​ ​ ​ ​ Commercial and industrial ​ 106 ​ 89 ​ 17 Sales comparison Discount to appraised value 69 % Commercial and industrial ​ 798 ​ 60 ​ 738 Liquidation of accounts receivable Discount to borrower's financial statement value 15 % Commercial construction and land ​ 1,261 ​ 678 ​ 583 Sales comparison Discount to appraised value 47 % Loans secured by farmland ​ 478 ​ 48 ​ 430 Sales comparison Discount to appraised value 46 % Total impaired loans ​ $ 3,375 ​ $ 1,051 ​ $ 2,324 ​ Foreclosed assets held for sale - real estate: ​ ​ ​ ​ Residential (1-4 family) ​ $ 292 ​ $ 0 ​ $ 292 Sales comparison Discount to appraised value 46 % Land ​ 70 ​ 0 ​ 70 Sales comparison Discount to appraised value 53 % Commercial real estate ​ 2,524 ​ 0 ​ 2,524 Sales comparison Discount to appraised value 39 % Total foreclosed assets held for sale ​ $ 2,886 ​ $ 0 ​ $ 2,886 ​ ​ Certain of the Corporation’s financial instruments are not measured at fair value in the consolidated financial statements. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. Certain financial instruments and all nonfinancial instruments are excluded from disclosure requirements. Therefore, the aggregate fair value amounts presented may not represent the underlying fair value of the Corporation. The estimated fair values, and related carrying amounts, of the Corporation’s financial instruments that are not recorded at fair value are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Fair Value ​ December 31, 2020 ​ December 31, 2019 ​ ​ Hierarchy ​ Carrying ​ Fair ​ Carrying ​ Fair ​ Level Amount Value Amount Value Financial assets: ​ ​ ​ ​ Cash and cash equivalents Level 1 ​ $ 96,017 ​ $ 96,017 ​ $ 31,122 ​ $ 31,122 Certificates of deposit Level 2 ​ 5,840 ​ 6,054 ​ 4,080 ​ 4,227 Restricted equity securities (included in Other Assets) Level 2 ​ 9,970 ​ 9,970 ​ 10,321 ​ 10,321 Loans, net Level 3 ​ 1,632,824 ​ 1,646,207 ​ 1,172,386 ​ 1,181,000 Accrued interest receivable Level 2 ​ 8,293 ​ 8,293 ​ 5,001 ​ 5,001 Interest rate swap agreements Level 2 ​ 6,566 ​ 6,566 ​ 0 ​ 0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ Deposits with no stated maturity Level 2 ​ 1,430,062 ​ 1,430,062 ​ 877,965 ​ 877,965 Time deposits Level 2 ​ 390,407 ​ 393,566 ​ 374,695 ​ 376,738 Short-term borrowings Level 2 ​ 20,022 ​ 19,974 ​ 86,220 ​ 86,166 Long-term borrowings Level 2 ​ 54,608 ​ 55,723 ​ 52,127 ​ 52,040 Subordinated debt ​ Level 2 ​ ​ 16,553 ​ ​ 16,680 ​ ​ 6,500 ​ ​ 6,499 Accrued interest payable Level 2 ​ 390 ​ 390 ​ 311 ​ 311 Interest rate swap agreements Level 2 ​ 6,566 ​ 6,566 ​ 0 ​ 0 ​

NATURE OF OPERATIONS AND SUMM_2

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
BASIS OF CONSOLIDATION	BASIS OF CONSOLIDATION –
NATURE OF OPERATIONS	NATURE OF OPERATIONS – The Corporation provides wealth management services through its trust department, including administration of trusts and estates, retirement plans, and other employee benefit plans, and investment management services. The Corporation offers a variety of personal and commercial insurance products through C&N Financial Services Corporation. C&N Financial Services Corporation also offers mutual funds, annuities, educational savings accounts and other investment products through registered agents. Management has determined that the Corporation has one reportable segment, “Community Banking.” All of the Corporation’s activities are interrelated, and each activity is dependent and assessed based on how each of the activities of the Corporation supports the others. The Corporation is subject to competition from other financial institutions. It is also subject to regulation by certain federal and state agencies and undergoes periodic examination by those regulatory authorities. As a consequence, the Corporation’s business is particularly susceptible to being affected by future federal and state legislation and regulations.
USE OF ESTIMATES	USE OF ESTIMATES – Material estimates that are particularly susceptible to change include: (1) the allowance for loan losses, (2) fair values of debt securities based on estimates from independent valuation services or from brokers and (3) assessment of goodwill for possible impairment.
INVESTMENT SECURITIES	INVESTMENT SECURITIES – Available-for-sale debt securities – Other-than-temporary impairment – management considers (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, (3) the intent and ability of the Corporation to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value, and (4) whether the Corporation intends to sell the security or if it is more likely than not that the Corporation will be required to sell the security before the recovery of its amortized cost basis. The credit-related impairment is recognized in earnings and is the difference between a security’s amortized cost basis and the present value of expected future cash flows discounted at the security’s effective interest rate. For debt securities classified as held-to-maturity, if any, the amount of noncredit-related impairment is recognized in other comprehensive income and accreted over the remaining life of the debt security as an increase in the carrying value of the security. Marketable equity security Restricted equity securities
DERIVATIVES AND HEDGING	DERIVATIVES –
LOANS HELD FOR SALE	LOANS HELD FOR SALE –
LOANS RECEIVABLE	LOANS RECEIVABLE – The loans receivable portfolio is segmented into residential mortgage, commercial and consumer loans. The residential mortgage segment includes the following classes: first and junior lien residential mortgages, home equity lines of credit and residential construction loans. The most significant classes of commercial loans are commercial loans secured by real estate, non-real estate secured commercial and industrial loans, loans to political subdivisions, commercial construction, multi-family residential and loans secured by farmland. Loans are placed on nonaccrual status for all classes of loans when, in the opinion of management, collection of interest is doubtful. Any unpaid interest previously accrued on those loans is reversed from income. Interest income is not recognized on specific impaired loans unless the likelihood of further loss is remote. Interest payments received on loans for which the risk of further loss is greater than remote are applied as a reduction of the loan principal balance. Interest income on other nonaccrual loans is recognized only to the extent of interest payments received. Generally, loans are restored to accrual status when the obligation is brought current, has performed in accordance with the contractual terms for a reasonable period of time (generally six months) and the ultimate collectability of the total contractual principal and interest is no longer in doubt. The past due status of all classes of loans receivable is determined based on contractual due dates for loan payments. Also, the amortization of deferred loan fees is discontinued when a loan is placed on nonaccrual status.
PURCHASED LOANS	PURCHASED LOANS – The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable yield. The nonaccretable yield represents estimated future credit losses expected to be incurred over the life of the loan. Subsequent decreases to the expected cash flows require us to evaluate the need for an allowance for credit losses. Subsequent improvements in expected cash flows result in the reversal of a corresponding amount of the nonaccretable yield which we then reclassify as accretable yield that is recognized into interest income over the remaining life of the loan using the interest method. Our evaluation of the amount of future cash flows that we expect to collect is performed in a similar manner as that used to determine our allowance for credit losses. Charge-offs of the principal amount on acquired loans would be first applied to the nonaccretable yield portion of the fair value adjustment.
ALLOWANCE FOR LOAN LOSSES	ALLOWANCE FOR LOAN LOSSES – The allowance for loan losses is maintained at a level considered adequate to provide for losses that can be reasonably anticipated. Management performs a quarterly evaluation of the adequacy of the allowance. The allowance is based on the Corporation’s past loan loss experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of any underlying collateral, composition of the loan portfolio, current economic conditions and other relevant factors. This evaluation is inherently subjective as it requires material estimates that may be susceptible to significant revision as more information becomes available. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Corporation’s allowance for loan losses. Such agencies may require the Corporation to recognize adjustments to the allowance based on their judgments of information available to them at the time of their examination. In the process of evaluating the loan portfolio, management also considers the Corporation’s exposure to losses from unfunded loan commitments. As of December 31, 2020 and 2019, management determined that no allowance for credit losses related to unfunded loan commitments was required. The allowance consists primarily of two major components – (1) a specific component based on a detailed assessment of certain larger loan relationships, mainly commercial purpose, determined on a loan-by-loan basis; and (2) a general component for the remainder of the portfolio based on a collective evaluation of pools of loans with similar risk characteristics. The general component is assigned to each pool of loans based on both historical net charge-off experience, and an evaluation of certain qualitative factors. An unallocated component is maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the above methodologies for estimating specific and general losses in the portfolio. The specific component relates to loans that are classified as impaired based on a detailed assessment of certain larger loan relationships evaluated by a management committee referred to as the Watch List Committee. Specific loan relationships are identified for evaluation based on the related credit risk rating. For individual loans classified as impaired, an allowance is established when the collateral value less estimated selling costs, present value of discounted cash flows or observable market price of the impaired loan is lower than the carrying value of that loan. The scope of loans reviewed individually each quarter to determine if they are impaired include all commercial loan relationships greater than $200,000 and any residential mortgage or consumer loans of $400,000 or more for which there is at least one extension of credit graded Special Mention, Substandard or Doubtful. Loans that are individually reviewed, but which are determined to not be impaired, are combined with all remaining loans that are not reviewed on a specific basis, and such loans are included within larger pools of loans based on similar risk and loss characteristics for purposes of determining the general component of the allowance. All loans classified as troubled debt restructurings and all commercial loan relationships less than $200,000 or other loan relationships less than $400,000 in the aggregate, but with an estimated loss of $100,000 or more, are individually evaluated for impairment. The general component covers pools of loans by loan class including commercial loans not considered individually impaired, as well as smaller balance homogeneous classes of loans, such as residential real estate, home equity lines of credit and other consumer loans. Accordingly, the Corporation generally does not separately identify individual consumer and residential loans for impairment disclosures, unless such a loan: (1) is subject to a restructuring agreement, (2) has an outstanding balance of $400,000 or more and a credit grade of Special Mention, Substandard or Doubtful, or (3) has an estimated loss of $100,000 or more. The pools of loans for each loan segment are evaluated for loss exposure based upon average historical net charge-off rates, adjusted for qualitative factors. The time period used in determining the average historical net charge-off rate for each loan class is based on management’s evaluation of an appropriate time period that captures an historical loss experience relevant to the current portfolio. Qualitative risk factors (described in the following paragraph) are evaluated for the impact on each of the three distinct segments (residential mortgage, commercial and consumer) within the loan portfolio. Each qualitative factor is assigned a value to reflect improving, stable or declining conditions based on management’s judgment using relevant information available at the time of the evaluation. Any adjustments to the factors are supported by a narrative documentation of changes in conditions accompanying the allowance for loan losses calculation. The qualitative factors used in the general component calculations are designed to address credit risk characteristics associated with each segment. The Corporation’s credit risk associated with all of the segments is significantly impacted by these factors, which include economic conditions within its market area, the Corporation’s lending policies, changes or trends in the portfolio, risk profile, competition, regulatory requirements and other factors. Purchased loans that did not show evidence of credit deterioration at the acquisition dates were initially recorded at fair value, including a discount for credit losses reflecting an estimate of the present value of credit losses based on market expectations. The general component of the allowance on purchased loans is evaluated separately from the rest of the portfolio. This evaluation includes consideration of the qualitative risk factors described above as well as the remaining purchased discount. Loans are classified as impaired when, based on current information and events, it is probable that the Corporation will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value 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 shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial loans by the fair value of the collateral (if the loan is collateral dependent), by future cash flows discounted at the loan’s effective rate or by the loan’s observable market price. For commercial loans secured by real estate, estimated fair values are determined primarily through third-party appraisals. When a real estate secured loan becomes impaired, a decision is made regarding whether an updated certified appraisal of the real estate is necessary. This decision is based on various considerations, including the age of the most recent appraisal, the loan-to-value ratio based on the original appraisal and the condition of the property. Appraised values are discounted to arrive at the estimated selling price of the collateral, which is considered to be the estimated fair value. The discounts also include estimated costs to sell the property. For commercial and industrial loans secured by non-real estate collateral, such as accounts receivable, inventory and equipment, estimated fair values are determined based on the borrower’s financial statements, inventory reports, accounts receivable aging data or equipment appraisals or invoices. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. Loans whose terms are modified are classified as troubled debt restructurings if the Corporation grants such borrowers concessions and it is deemed that those borrowers are experiencing financial difficulty. Concessions granted under a troubled debt restructuring generally involve reductions in required payments, an extension of a loan’s stated maturity date or a temporary reduction in interest rate. Loans classified as troubled debt restructurings are designated as impaired. Nonaccrual troubled debt restructurings may be restored to accrual status if the ultimate collectability of principal and interest payments under the modified terms is not in doubt, and there has been a period (generally, for at least six consecutive months) of satisfactory payment performance by the borrower either immediately before or after the restructuring. In March 2020, various regulatory agencies, including the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporation issued an interagency statement on loan modifications and reporting for financial institutions working with customers affected by COVID-19. The interagency statement was effective immediately and impacted accounting for loan modifications. The agencies confirmed with the staff of the FASB that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief, are not to be considered TDRs. Provisions of the CARES Act Section 4013 largely mirrored the provisions of the interagency statement, providing that modified loans were not to be considered TDRs if they were performing at December 31, 2019 and other consideration set forth in the interagency statements were met. Borrowers considered current are those that are less than 30 days past due on their contractual payments at the time a modification program is implemented or at December 31, 2019.
BANK PREMISES AND EQUIPMENT	BANK PREMISES AND EQUIPMENT –
IMPAIRMENT OF LONG-LIVED ASSETS	IMPAIRMENT OF LONG-LIVED ASSETS –
FORECLOSED ASSETS HELD FOR SALE	FORECLOSED ASSETS HELD FOR SALE –
GOODWILL	GOODWILL –
CORE DEPOSIT INTANGIBLES	CORE DEPOSIT INTANGIBLES –
SERVICING RIGHTS	SERVICING RIGHTS
INCOME TAXES	INCOME TAXES available evidence. Tax benefits from investments in limited partnerships that have qualified for federal low-income tax credits are recognized as a reduction in the provision for income tax over the term of the investment using the effective yield method. The Corporation includes income tax penalties in the provision for income tax. The Corporation has no accrued interest related to unrecognized tax benefits.
STOCK COMPENSATION PLANS	STOCK COMPENSATION PLANS The fair value of each stock option is estimated on the date of grant using the Black-Scholes-Merton option valuation model. The fair value of restricted stock is based on the current market price on the date of grant.
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS	OFF-BALANCE SHEET FINANCIAL INSTRUMENTS –
CASH FLOWS	CASH FLOWS –
REVENUE RECOGNITION	REVENUE RECOGNITION – Additional disclosures related to the Corporation’s largest sources of noninterest income within the consolidated statements of income from contracts with customers that are subject to Accounting Standards Codification (ASC) Topic 606 are as follows: Trust and financial management revenue – Trust revenue is recorded on a cash basis, which is not materially different from the accrual basis. The majority (approximately 83%, based on annual 2020 results) of trust revenue is earned and collected monthly, with the amount determined based on a percentage of the fair value of the trust assets under management. Wealth management fees are contractually agreed with each customer, and fee levels vary based mainly on the size of assets under management. The services provided under such a contract represent a single performance obligation under the Accounting Standards Updates (ASUs) because it embodies a series of distinct goods or services that are substantially the same and have the same pattern of transfer to the customer. None of the contracts with trust customers provide for incentive-based fees. In addition to wealth management fees, trust revenue includes fees for provision of services, including employee benefit plan administration, tax return preparation and estate planning and settlement. Fees for such services are billed based on contractual arrangements or established fee schedules and are typically billed upon completion of providing such services. The costs of acquiring trust customers are incremental and recognized within noninterest expense in the consolidated statements of income. Service charges on deposit accounts services are provided to the customers. Incremental costs of obtaining deposit contracts are not significant and are recognized as expense when incurred within noninterest expense in the consolidated statements of income. Interchange revenue from debit card transactions –

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	12 Months Ended
	Dec. 31, 2020
BUSINESS COMBINATIONS
Summary adjustments to the initial fair value measurements of certain assets and liabilities	​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Preliminary goodwill balance, September 30, 2020 ​ $ 24,138 Adjustments in fourth quarter 2020: ​ ​ ​ Write-down purchased credit impaired loan ​ ​ 556 Increase deferred tax asset, net ​ ​ (410) Decrease other liabilities ​ ​ (167) Goodwill balance, December 31, 2020 ​ $ 24,117
Summary of consideration paid and assets acquired and liabilities assumed	​ ​ ​ ​ ​ (In Thousands) ​ Fair value of consideration transferred: ​ ​ ​ Cash ​ $ 21,837 Common stock issued ​ 41,429 Total consideration transferred ​ $ 63,266 ​ ​ ​ ​ Estimated fair value of assets acquired and (liabilities) assumed: ​ ​ ​ Cash and cash equivalents ​ $ 97,792 Available-for-sale debt securities ​ 10,754 Loans receivable ​ 464,236 Bank-owned life insurance ​ 11,170 Accrued interest receivable ​ 1,922 Bank premises and equipment ​ 3,250 Foreclosed assets held for sale ​ 860 Deferred tax asset, net ​ 1,879 Core deposit intangible ​ 3,144 Goodwill ​ 24,117 Other assets ​ 13,478 Deposits ​ (481,796) Short-term borrowings ​ (33,950) Long-term borrowings ​ (30,025) Subordinated debt ​ (10,091) Accrued interest and other liabilities ​ ​ (13,474) Estimated excess fair value of assets acquired over liabilities assumed ​ $ 63,266 ​
Loans acquired on business acquisition	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Performing ​ ​ PCI ​ Total Residential mortgage: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 65,883 ​ ​ $ 0 ​ $ 65,883 Residential mortgage loans - junior liens ​ ​ 4,141 ​ ​ ​ 75 ​ ​ 4,216 Home equity lines of credit ​ ​ 8,368 ​ ​ ​ 0 ​ ​ 8,368 1-4 Family residential construction ​ ​ 11,437 ​ ​ ​ 0 ​ ​ 11,437 Total residential mortgage ​ ​ 89,829 ​ ​ ​ 75 ​ ​ 89,904 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ ​ 240,482 ​ ​ ​ 4,152 ​ ​ 244,634 Commercial and industrial ​ ​ 39,068 ​ ​ ​ 806 ​ ​ 39,874 Commercial construction and land ​ ​ 63,740 ​ ​ ​ 0 ​ ​ 63,740 Loans secured by farmland ​ ​ 73 ​ ​ ​ 0 ​ ​ 73 Multi-family (5 or more) residential ​ ​ 23,065 ​ ​ ​ 1,615 ​ ​ 24,680 Other commercial loans ​ ​ 952 ​ ​ ​ 0 ​ ​ 952 Total commercial ​ ​ 367,380 ​ ​ ​ 6,573 ​ ​ 373,953 Consumer ​ ​ 379 ​ ​ ​ 0 ​ ​ 379 Total ​ $ 457,588 ​ ​ $ 6,648 ​ $ 464,236
Fair Value adjustments of loans acquired on business acquisition	​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Gross amortized cost at acquisition ​ $ 472,012 Fair value adjustments: ​ ​ ​ Market rates ​ ​ 2,909 Credit adjustment on non-impaired loans ​ ​ (7,219) Credit adjustment on impaired loans ​ ​ (3,466) Fair value at acquisition ​ $ 464,236
Pro forma information as if the merger had been completed on January 1, 2019	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended ​ ​ Dec. 31, ​ Dec. 31, (In Thousands Except Per Share Data) ​ 2020 ​ 2019 Interest income ​ $ 88,379 ​ $ 88,830 Interest expense ​ ​ 13,407 ​ ​ 15,156 Net interest income ​ ​ 74,972 ​ ​ 73,674 Provision for loan losses ​ ​ 4,013 ​ ​ 1,309 Net interest income after provision for loan losses ​ ​ 70,959 ​ ​ 72,365 Noninterest income ​ ​ 24,657 ​ ​ 20,550 Net gains on securities ​ ​ 169 ​ ​ 23 Loss on prepayment of borrowings ​ ​ 1,636 ​ ​ 0 Other noninterest expenses ​ ​ 60,094 ​ ​ 62,377 Income before income tax provision ​ ​ 34,055 ​ ​ 30,561 Income tax provision ​ ​ 6,227 ​ ​ 5,311 Net income ​ $ 27,828 ​ $ 25,250 Earnings per common share - basic ​ $ 1.75 ​ $ 1.64 Earnings per common share - diluted ​ $ 1.75 ​ $ 1.63

PER SHARE DATA (Tables)

PER SHARE DATA (Tables)	12 Months Ended
	Dec. 31, 2020
PER SHARE DATA
Schedule of Basic and Diluted earnings per share	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands, Except Share and Per Share Data) Years Ended ​ ​ December 31, ​ December 31, ​ 2020 2019 Basic ​ ​ Net income ​ $ 19,222 ​ $ 19,504 Less: Dividends and undistributed earnings allocated to participating securities ​ (116) ​ (100) Net income attributable to common shares ​ $ 19,106 ​ $ 19,404 Basic weighted-average common shares outstanding ​ 14,743,386 ​ 13,298,736 Basic earnings per common share (a) ​ $ 1.30 ​ $ 1.46 Diluted ​ ​ Net income attributable to common shares ​ $ 19,106 ​ $ 19,404 Basic weighted-average common shares outstanding ​ 14,743,386 ​ 13,298,736 Dilutive effect of potential common stock arising from stock options ​ 3,662 ​ 22,823 Diluted weighted-average common shares outstanding ​ 14,747,048 ​ 13,321,559 Diluted earnings per common share (a) ​ $ 1.30 ​ $ 1.46 (a) Basic and diluted earnings per share under the two-class method are determined on net income reported on the income statement less earnings allocated to nonvested restricted shares with nonforfeitable dividends (participating securities).

COMPREHENSIVE INCOME (Tables)

COMPREHENSIVE INCOME (Tables)	12 Months Ended
	Dec. 31, 2020
COMPREHENSIVE INCOME
Schedule of the components of other comprehensive income (loss), and the related tax effects	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Before-Tax Income Tax Net-of-Tax ​ ​ Amount ​ Effect ​ Amount 2020 ​ ​ ​ Unrealized gains on available-for-sale debt securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized holding gains on available-for-sale debt securities ​ $ 10,504 ​ $ (2,205) ​ $ 8,299 Reclassification adjustment for (gains) realized in income ​ ​ (169) ​ ​ 35 ​ ​ (134) Other comprehensive income on available-for-sale debt securities ​ ​ 10,335 ​ ​ (2,170) ​ ​ 8,165 Unfunded pension and postretirement obligations: ​ ​ ​ Changes from plan amendments and actuarial gains and losses included in other comprehensive income ​ (49) ​ 11 ​ (38) Amortization of prior service cost and net actuarial loss included in net periodic benefit cost ​ (29) ​ 6 ​ (23) Other comprehensive loss on unfunded retirement obligations ​ (78) ​ 17 ​ (61) Total other comprehensive income ​ $ 10,257 ​ $ (2,153) ​ $ 8,104 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Before-Tax Income Tax Net-of-Tax ​ ​ Amount ​ Effect ​ Amount 2019 ​ ​ ​ Unrealized gains on available-for-sale debt securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized holding gains on available-for-sale debt securities ​ $ 9,920 ​ $ (2,084) ​ $ 7,836 Reclassification adjustment for (gains) realized in income ​ ​ (23) ​ ​ 5 ​ ​ (18) Other comprehensive income on available-for-sale debt securities ​ $ 9,897 ​ $ (2,079) ​ $ 7,818 Unfunded pension and postretirement obligations: ​ ​ ​ Changes from plan amendments and actuarial gains and losses included in other comprehensive income ​ 87 ​ (19) ​ 68 Amortization of prior service cost and net actuarial loss included in net periodic benefit cost ​ (32) ​ 7 ​ (25) Other comprehensive income on unfunded retirement obligations ​ 55 ​ (12) ​ 43 Total other comprehensive income ​ $ 9,952 ​ $ (2,091) ​ $ 7,861
Schedule components of other comprehensive income and affected line item in the consolidated statements of income	​ ​ ​ ​ ​ ​ Affected Line Item in the Description Consolidated Statements of Income Amortization of prior service cost and net actuarial loss included in net periodic benefit cost (before-tax) Other noninterest expense Reclassification adjustment for (gains) realized in income (before-tax) ​ Realized gains on available-for-sale debt securities, net Income tax effect ​ Income tax provision
Schedule of changes in the components of accumulated other comprehensive income (loss)	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Unrealized Accumulated ​ ​ ​ Gains ​ Unfunded ​ Other ​ (Losses) Retirement Comprehensive ​ on Securities Obligations Income (Loss) 2020 ​ ​ ​ Balance, beginning of period ​ $ 3,511 ​ $ 180 ​ $ 3,691 Other comprehensive income (loss) during year ended December 31, 2020 ​ 8,165 ​ (61) ​ 8,104 Balance, end of period ​ $ 11,676 ​ $ 119 ​ $ 11,795 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 ​ ​ ​ Balance, beginning of period ​ $ (4,307) ​ $ 137 ​ $ (4,170) Other comprehensive income during year ended December 31, 2019 ​ 7,818 ​ 43 ​ 7,861 Balance, end of period ​ $ 3,511 ​ $ 180 ​ $ 3,691

CASH AND DUE FROM BANKS (Tables

CASH AND DUE FROM BANKS (Tables)	12 Months Ended
	Dec. 31, 2020
CASH AND DUE FROM BANKS
Schedule of cash and due from banks	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Cash and cash equivalents ​ $ 96,017 ​ $ 31,122 Certificates of deposit ​ 5,840 ​ 4,080 Total cash and due from banks ​ $ 101,857 ​ $ 35,202

SECURITIES (Tables)

SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2020
SECURITIES
Schedule of amortized cost and fair value of available-for-sale debt securities at	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, 2020 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ ​ ​ Unrealized ​ Unrealized ​ ​ ​ ​ Amortized Holding Holding Fair ​ Cost Gains Losses Value ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of the U.S. Treasury ​ $ 12,184 ​ $ 0 ​ $ (2) ​ $ 12,182 Obligations of U.S. Government agencies ​ ​ 25,349 ​ ​ 1,003 ​ ​ (8) ​ ​ 26,344 Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ ​ Tax-exempt ​ 116,427 ​ 6,000 ​ (26) ​ 122,401 Taxable ​ 45,230 ​ 2,246 ​ (24) ​ 47,452 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 36,853 ​ 1,323 ​ 0 ​ 38,176 Residential collateralized mortgage obligations ​ 56,048 ​ 1,428 ​ (9) ​ 57,467 Commercial mortgage-backed securities ​ 42,461 ​ 2,849 ​ 0 ​ 45,310 Total available-for-sale debt securities ​ $ 334,552 ​ $ 14,849 ​ $ (69) ​ $ 349,332 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, 2019 ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ Unrealized ​ Unrealized ​ ​ ​ ​ Amortized Holding Holding Fair ​ Cost Gains Losses Value ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Obligations of U.S. Government agencies ​ $ 16,380 ​ $ 620 ​ $ 0 ​ $ 17,000 Obligations of states and political subdivisions: ​ ​ ​ ​ Tax-exempt ​ 68,787 ​ 2,011 ​ (38) ​ 70,760 Taxable ​ 35,446 ​ 927 ​ (70) ​ 36,303 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 58,875 ​ 472 ​ (137) ​ 59,210 Residential collateralized mortgage obligations ​ 115,025 ​ 308 ​ (610) ​ 114,723 Commercial mortgage-backed securities ​ 47,765 ​ 1,069 ​ (107) ​ 48,727 Total available-for-sale debt securities ​ $ 342,278 ​ $ 5,407 ​ $ (962) ​ $ 346,723
Schedule of gross unrealized losses and fair value of available-for-sale debt securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 Less Than 12 Months 12 Months or More Total (In Thousands) ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Value Losses Value Losses Value Losses Obligations of the U.S. Treasury ​ $ 9,159 ​ $ (2) ​ $ 0 ​ $ 0 ​ $ 9,159 ​ $ (2) Obligations of U.S. Government agencies ​ ​ 4,992 ​ ​ (8) ​ ​ 0 ​ ​ 0 ​ ​ 4,992 ​ ​ (8) Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt ​ ​ 3,811 ​ ​ (26) ​ ​ 0 ​ ​ 0 ​ ​ 3,811 ​ ​ (26) Taxable ​ 5,235 ​ (24) ​ 0 ​ 0 ​ 5,235 ​ (24) Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, ​ ​ ​ ​ ​ ​ Residential collateralized mortgage obligations ​ 2,861 ​ (9) ​ 0 ​ 0 ​ 2,861 ​ (9) Total temporarily impaired available for sale debt securities ​ $ 26,058 ​ $ (69) ​ $ 0 ​ $ 0 ​ $ 26,058 ​ $ (69) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 Less Than 12 Months 12 Months or More Total (In Thousands) ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Value Losses Value Losses Value Losses Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ Tax-exempt ​ $ 6,429 ​ $ (38) ​ $ 0 ​ $ 0 ​ $ 6,429 ​ $ (38) Taxable ​ 5,624 ​ (68) ​ 161 ​ (2) ​ 5,785 ​ (70) Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential pass-through securities ​ 9,771 ​ (35) ​ 14,787 ​ (102) ​ 24,558 ​ (137) Residential collateralized mortgage obligations ​ 31,409 ​ (195) ​ 30,535 ​ (415) ​ 61,944 ​ (610) Commercial mortgage-backed securities ​ 0 ​ 0 ​ 8,507 ​ (107) ​ 8,507 ​ (107) Total temporarily impaired available-for-sale debt securities ​ $ 53,233 ​ $ (336) ​ $ 53,990 ​ $ (626) ​ $ 107,223 ​ $ (962)
Schedule of gross realized gains and losses from available-for-sale	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ 2020 ​ 2019 Gross realized gains from sales ​ $ 222 ​ $ 24 Gross realized losses from sales ​ (53) ​ (1) Net realized gains ​ $ 169 ​ $ 23 Income tax provision related to net realized gains ​ $ 35 ​ $ 5
Schedule of the amortized cost and fair value of available-for-sale debt securities by contractual maturity	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, 2020 ​ ​ Amortized ​ Fair ​ Cost Value Due in one year or less ​ $ 13,409 ​ $ 13,506 Due from one year through five years ​ 46,172 ​ 47,758 Due from five years through ten years ​ 47,535 ​ 50,110 Due after ten years ​ 92,074 ​ 97,005 Sub-total ​ 199,190 ​ 208,379 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ Residential pass-through securities ​ 36,853 ​ 38,176 Residential collateralized mortgage obligations ​ 56,048 ​ 57,467 Commercial mortgage-backed securities ​ 42,461 ​ 45,310 Total ​ $ 334,552 ​ $ 349,332

LOANS (Tables)

LOANS (Tables)	12 Months Ended
	Dec. 31, 2020
LOANS
Summary of loans outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ Dec. 31, Dec. 31, ​ 2020 ​ 2019 Residential mortgage: ​ ​ ​ Residential mortgage loans - first liens ​ $ 532,947 ​ $ 510,641 Residential mortgage loans - junior liens ​ 27,311 ​ 27,503 Home equity lines of credit ​ 39,301 ​ 33,638 1-4 Family residential construction ​ 20,613 ​ 14,798 Total residential mortgage ​ 620,172 ​ 586,580 Commercial: ​ ​ Commercial loans secured by real estate ​ 531,810 ​ 301,227 Commercial and industrial ​ 159,577 ​ 126,374 Small Business Administration - Paycheck Protection Program ​ ​ 132,269 ​ ​ 0 Political subdivisions ​ 53,221 ​ 53,570 Commercial construction and land ​ 42,874 ​ 33,555 Loans secured by farmland ​ 11,736 ​ 12,251 Multi-family (5 or more) residential ​ 55,811 ​ 31,070 Agricultural loans ​ 3,164 ​ 4,319 Other commercial loans ​ 17,289 ​ 16,535 Total commercial ​ 1,007,751 ​ 578,901 Consumer ​ 16,286 ​ 16,741 Total ​ 1,644,209 ​ 1,182,222 Less: allowance for loan losses ​ (11,385) ​ (9,836) Loans, net ​ $ 1,632,824 ​ $ 1,172,386
Schedule of quantity and balances of modification	​ ​ ​ ​ ​ ​ ​ ​ ​ Deferrals Remaining ​ ​ As of December 31, 2020 (Dollars in Thousands) ​ Number ​ ​ ​ ​ ​ of ​ Recorded ​ Loans Investment COVID-19-related loan modifications: ​ Residential mortgage 15 ​ $ 2,334 Consumer 3 ​ 61 Commercial 27 ​ 35,002 Total 45 ​ $ 37,397
Schedule of adjustments to the initial market rate and credit fair value adjustments recognized	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ ​ ​ ​ Year Ended ​ ​ December 31, ​ December 31, ​ ​ 2020 ​ 2019 Market Rate Adjustment ​ ​ Adjustments to gross amortized cost of loans at beginning of period ​ $ (1,415) ​ $ 0 Market rate adjustment recorded in acquisition ​ ​ 2,909 ​ ​ (1,807) (Amortization) accretion recognized in interest income ​ ​ (776) ​ ​ 392 Adjustments to gross amortized cost of loans at end of period ​ $ 718 ​ $ (1,415) Credit Adjustment on Non-impaired Loans ​ ​ ​ ​ ​ ​ Adjustments to gross amortized cost of loans at beginning of period ​ $ (1,216) ​ $ 0 Credit adjustment recorded in acquisition ​ ​ (7,219) ​ ​ (1,914) Accretion recognized in interest income ​ 2,456 ​ 698 Adjustments to gross amortized cost of loans at end of period ​ $ (5,979) ​ $ (1,216)
Schedule of components of the purchase account adjustments related to the PCI loans	​ ​ ​ ​ ​ (In Thousands) ​ July 1, 2020 Contractually required principal at acquisition ​ $ 10,114 Non-accretable discount ​ (3,466) Expected cash flows ​ $ 6,648
Schedule of PCI loans	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, ​ December 31, ​ 2020 2019 Outstanding balance ​ $ 10,316 ​ $ 759 Carrying amount ​ 6,841 ​ 441
Schedule of transactions within the allowance for loan losses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ ​ ​ ​ ​ December 31, Year Ended December 31, 2020 ​ 2019 ​ ​ ​ ​ ​ ​ ​ Provision ​ 2020 (In Thousands) ​ Balance ​ Charge-offs ​ Recoveries ​ (Credit) ​ Balance Allowance for Loan Losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage: ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 3,405 ​ $ 0 ​ $ 39 ​ $ 80 ​ $ 3,524 Residential mortgage loans - junior liens ​ 384 ​ 0 ​ 1 ​ (36) ​ 349 Home equity lines of credit ​ 276 ​ 0 ​ 4 ​ 1 ​ 281 1-4 Family residential construction ​ 117 ​ 0 ​ 0 ​ (18) ​ 99 Total residential mortgage ​ 4,182 ​ 0 ​ 44 ​ 27 ​ 4,253 Commercial: ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 1,921 ​ 0 ​ 0 ​ 1,130 ​ 3,051 Commercial and industrial ​ 1,391 ​ (2,236) ​ 16 ​ 3,074 ​ 2,245 Commercial construction and land ​ 966 ​ (107) ​ 0 ​ (405) ​ 454 Loans secured by farmland ​ 158 ​ 0 ​ 0 ​ (38) ​ 120 Multi-family (5 or more) residential ​ 156 ​ 0 ​ 0 ​ 80 ​ 236 Agricultural loans ​ 41 ​ 0 ​ 0 ​ (7) ​ 34 Other commercial loans ​ 155 ​ 0 ​ 0 ​ 13 ​ 168 Total commercial ​ 4,788 ​ (2,343) ​ 16 ​ 3,847 ​ 6,308 Consumer ​ 281 ​ (122) ​ 41 ​ 39 ​ 239 Unallocated ​ 585 ​ 0 ​ 0 ​ 0 ​ 585 Total Allowance for Loan Losses ​ $ 9,836 ​ $ (2,465) ​ $ 101 ​ $ 3,913 ​ $ 11,385 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ ​ ​ ​ ​ December 31, Year Ended December 31, 2019 ​ 2018 ​ ​ ​ ​ ​ ​ ​ Provision ​ 2019 (In Thousands) ​ Balance ​ Charge-offs ​ Recoveries ​ (Credit) ​ Balance Allowance for Loan Losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage: ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 3,156 ​ $ (166) ​ $ 4 ​ $ 411 ​ $ 3,405 Residential mortgage loans - junior liens ​ 325 ​ (24) ​ 2 ​ 81 ​ 384 Home equity lines of credit ​ 302 ​ 0 ​ 5 ​ (31) ​ 276 1-4 Family residential construction ​ 203 ​ 0 ​ 1 ​ (87) ​ 117 Total residential mortgage ​ 3,986 ​ (190) ​ 12 ​ 374 ​ 4,182 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 2,538 ​ 0 ​ 0 ​ (617) ​ 1,921 Commercial and industrial ​ 1,553 ​ (6) ​ 6 ​ (162) ​ 1,391 Commercial construction and land ​ 110 ​ 0 ​ 0 ​ 856 ​ 966 Loans secured by farmland ​ 102 ​ 0 ​ 0 ​ 56 ​ 158 Multi-family (5 or more) residential ​ 114 ​ 0 ​ 0 ​ 42 ​ 156 Agricultural loans ​ 46 ​ 0 ​ 0 ​ (5) ​ 41 Other commercial loans ​ 128 ​ 0 ​ 0 ​ 27 ​ 155 Total commercial ​ 4,591 ​ (6) ​ 6 ​ 197 ​ 4,788 Consumer ​ 233 ​ (183) ​ 39 ​ 192 ​ 281 Unallocated ​ 499 ​ 0 ​ 0 ​ 86 ​ 585 Total Allowance for Loan Losses ​ $ 9,309 ​ $ (379) ​ $ 57 ​ $ 849 ​ $ 9,836
Schedule of aggregate credit quality classification of outstanding loans by risk	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ Purchased ​ ​ (In Thousands) ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ Credit ​ ​ ​ ​ ​ Pass ​ Mention ​ Substandard ​ Doubtful ​ Impaired ​ Total Residential Mortgage: ​ ​ ​ ​ ​ ​ Residential Mortgage loans - first liens ​ $ 516,685 ​ $ 6,192 ​ $ 9,994 ​ $ 0 ​ $ 76 ​ $ 532,947 Residential Mortgage loans - junior liens ​ 26,480 ​ 141 ​ 621 ​ 0 ​ 69 ​ 27,311 Home equity lines of credit ​ 38,529 ​ 59 ​ 713 ​ 0 ​ 0 ​ 39,301 1-4 Family residential construction ​ 20,613 ​ 0 ​ 0 ​ 0 ​ 0 ​ 20,613 Total residential mortgage ​ 602,307 ​ 6,392 ​ 11,328 ​ 0 ​ 145 ​ 620,172 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 494,876 ​ 17,374 ​ 15,262 ​ 0 ​ 4,298 ​ 531,810 Commercial and Industrial ​ 143,500 ​ 8,025 ​ 7,268 ​ 0 ​ 784 ​ 159,577 Small Business Administration - Paycheck Protection Program ​ ​ 132,269 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 132,269 Political subdivisions ​ 53,221 ​ 0 ​ 0 ​ 0 ​ 0 ​ 53,221 Commercial construction and land ​ 42,110 ​ 715 ​ 49 ​ 0 ​ 0 ​ 42,874 Loans secured by farmland ​ 10,473 ​ 405 ​ 858 ​ 0 ​ 0 ​ 11,736 Multi-family (5 or more) residential ​ 50,563 ​ 2,405 ​ 1,229 ​ 0 ​ 1,614 ​ 55,811 Agricultural loans ​ 2,569 ​ 0 ​ 595 ​ 0 ​ 0 ​ 3,164 Other commercial loans ​ 17,289 ​ 0 ​ 0 ​ 0 ​ 0 ​ 17,289 Total commercial ​ 946,870 ​ 28,924 ​ 25,261 ​ 0 ​ 6,696 ​ 1,007,751 Consumer ​ 16,172 ​ 0 ​ 114 ​ 0 ​ 0 ​ 16,286 Totals ​ $ 1,565,349 ​ $ 35,316 ​ $ 36,703 ​ $ 0 ​ $ 6,841 ​ $ 1,644,209 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ Purchased ​ ​ (In Thousands) ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ Credit ​ ​ ​ ​ ​ Pass ​ Mention ​ Substandard ​ Doubtful ​ Impaired ​ Total Residential Mortgage: ​ ​ ​ ​ ​ ​ Residential Mortgage loans - first liens ​ $ 500,963 ​ $ 193 ​ $ 9,324 ​ $ 84 ​ $ 77 ​ $ 510,641 Residential Mortgage loans - junior liens ​ 26,953 ​ 79 ​ 471 ​ 0 ​ 0 ​ 27,503 Home equity lines of credit ​ 33,170 ​ 59 ​ 409 ​ 0 ​ 0 ​ 33,638 1-4 Family residential construction ​ 14,798 ​ 0 ​ 0 ​ 0 ​ 0 ​ 14,798 Total residential mortgage ​ 575,884 ​ 331 ​ 10,204 ​ 84 ​ 77 ​ 586,580 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 294,397 ​ 4,773 ​ 1,693 ​ 0 ​ 364 ​ 301,227 Commercial and Industrial ​ 114,293 ​ 9,538 ​ 2,543 ​ 0 ​ 0 ​ 126,374 Political subdivisions ​ 53,570 ​ 0 ​ 0 ​ 0 ​ 0 ​ 53,570 Commercial construction and land ​ 32,224 ​ 0 ​ 1,331 ​ 0 ​ 0 ​ 33,555 Loans secured by farmland ​ 6,528 ​ 4,681 ​ 1,042 ​ 0 ​ 0 ​ 12,251 Multi-family (5 or more) residential ​ 30,160 ​ 0 ​ 910 ​ 0 ​ 0 ​ 31,070 Agricultural loans ​ 3,343 ​ 335 ​ 641 ​ 0 ​ 0 ​ 4,319 Other commercial loans ​ 16,416 ​ 0 ​ 119 ​ 0 ​ 0 ​ 16,535 Total commercial ​ 550,931 ​ 19,327 ​ 8,279 ​ 0 ​ 364 ​ 578,901 Consumer ​ 16,720 ​ 0 ​ 21 ​ 0 ​ 0 ​ 16,741 Totals ​ $ 1,143,535 ​ $ 19,658 ​ $ 18,504 ​ $ 84 ​ $ 441 ​ $ 1,182,222
Summary of loan balances and the related allowance for loan losses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 Loans: ​ Allowance for Loan Losses: (In Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ Evaluated Evaluated Totals Evaluated Evaluated Totals Residential mortgage: ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 2,385 ​ $ 530,562 ​ $ 532,947 ​ $ 9 ​ $ 3,515 ​ $ 3,524 Residential mortgage loans - junior liens ​ 414 ​ 26,897 ​ 27,311 ​ 153 ​ 196 ​ 349 Home equity lines of credit ​ 0 ​ 39,301 ​ 39,301 ​ 0 ​ 281 ​ 281 1-4 Family residential construction ​ 0 ​ 20,613 ​ 20,613 ​ 0 ​ 99 ​ 99 Total residential mortgage ​ 2,799 ​ 617,373 ​ 620,172 ​ 162 ​ 4,091 ​ 4,253 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 11,962 ​ 519,848 ​ 531,810 ​ 692 ​ 2,359 ​ 3,051 Commercial and industrial ​ 1,359 ​ 158,218 ​ 159,577 ​ 71 ​ 2,174 ​ 2,245 Small Business Administration - Paycheck Protection Program ​ 0 ​ 132,269 ​ 132,269 ​ 0 ​ 0 ​ 0 Political subdivisions ​ 0 ​ 53,221 ​ 53,221 ​ 0 ​ 0 ​ 0 Commercial construction and land ​ 0 ​ 42,874 ​ 42,874 ​ 0 ​ 454 ​ 454 Loans secured by farmland ​ 84 ​ 11,652 ​ 11,736 ​ 0 ​ 120 ​ 120 Multi-family (5 or more) residential ​ 1,614 ​ 54,197 ​ 55,811 ​ 0 ​ 236 ​ 236 Agricultural loans ​ 0 ​ 3,164 ​ 3,164 ​ 0 ​ 34 ​ 34 Other commercial loans ​ 0 ​ 17,289 ​ 17,289 ​ 0 ​ 168 ​ 168 Total commercial ​ 15,019 ​ 992,732 ​ 1,007,751 ​ 763 ​ 5,545 ​ 6,308 Consumer ​ 0 ​ 16,286 ​ 16,286 ​ 0 ​ 239 ​ 239 Unallocated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 585 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 17,818 ​ $ 1,626,391 ​ $ 1,644,209 ​ $ 925 ​ $ 9,875 ​ $ 11,385 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 Loans: ​ Allowance for Loan Losses: (In Thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ ​ Individually ​ Collectively ​ ​ ​ Evaluated Evaluated Totals Evaluated Evaluated Totals Residential mortgage: ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 1,023 ​ $ 509,618 ​ $ 510,641 ​ $ 0 ​ $ 3,405 ​ $ 3,405 Residential mortgage loans - junior liens ​ 368 ​ 27,135 ​ 27,503 ​ 176 ​ 208 ​ 384 Home equity lines of credit ​ 0 ​ 33,638 ​ 33,638 ​ 0 ​ 276 ​ 276 1-4 Family residential construction ​ 0 ​ 14,798 ​ 14,798 ​ 0 ​ 117 ​ 117 Total residential mortgage ​ 1,391 ​ 585,189 ​ 586,580 ​ 176 ​ 4,006 ​ 4,182 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 684 ​ 300,543 ​ 301,227 ​ 0 ​ 1,921 ​ 1,921 Commercial and industrial ​ 1,467 ​ 124,907 ​ 126,374 ​ 149 ​ 1,242 ​ 1,391 Political subdivisions ​ 0 ​ 53,570 ​ 53,570 ​ 0 ​ 0 ​ 0 Commercial construction and land ​ 1,261 ​ 32,294 ​ 33,555 ​ 678 ​ 288 ​ 966 Loans secured by farmland ​ 607 ​ 11,644 ​ 12,251 ​ 48 ​ 110 ​ 158 Multi-family (5 or more) residential ​ 0 ​ 31,070 ​ 31,070 ​ 0 ​ 156 ​ 156 Agricultural loans ​ 76 ​ 4,243 ​ 4,319 ​ 0 ​ 41 ​ 41 Other commercial loans ​ 0 ​ 16,535 ​ 16,535 ​ 0 ​ 155 ​ 155 Total commercial ​ 4,095 ​ 574,806 ​ 578,901 ​ 875 ​ 3,913 ​ 4,788 Consumer ​ 0 ​ 16,741 ​ 16,741 ​ 0 ​ 281 ​ 281 Unallocated ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 585 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ $ 5,486 ​ $ 1,176,736 ​ $ 1,182,222 ​ $ 1,051 ​ $ 8,200 ​ $ 9,836
Summary of information related to impaired loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, 2020 ​ December 31, 2019 ​ ​ Unpaid ​ ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ ​ ​ ​ ​ Principal ​ Recorded ​ Related ​ Principal ​ Recorded ​ Related ​ Balance Investment Allowance Balance Investment Allowance With no related allowance recorded: ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 1,248 ​ $ 1,248 ​ $ 0 ​ $ 645 ​ $ 617 ​ $ 0 Residential mortgage loans - junior liens ​ 160 ​ 105 ​ 0 ​ 42 ​ 42 ​ 0 Commercial loans secured by real estate ​ 7,168 ​ 5,398 ​ 0 ​ 684 ​ 684 ​ 0 Commercial and industrial ​ 1,781 ​ 1,287 ​ 0 ​ 563 ​ 563 ​ 0 Loans secured by farmland ​ 84 ​ 84 ​ 0 ​ 129 ​ 129 ​ 0 Multi-family (5 or more) residential ​ ​ 2,770 ​ ​ 1,614 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 0 Agricultural loans ​ 0 ​ 0 ​ 0 ​ 76 ​ 76 ​ 0 Total with no related allowance recorded ​ 13,211 ​ 9,736 ​ 0 ​ 2,139 ​ 2,111 ​ 0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ With a related allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ 1,200 ​ 1,200 ​ 9 ​ 406 ​ 406 ​ 0 Residential mortgage loans - junior liens ​ 309 ​ 309 ​ 153 ​ 326 ​ 326 ​ 176 Commercial loans secured by real estate ​ ​ 6,501 ​ ​ 6,501 ​ ​ 691 ​ ​ 0 ​ ​ 0 ​ ​ 0 Commercial and industrial ​ 72 ​ 72 ​ 72 ​ 904 ​ 904 ​ 149 Construction and other land loans ​ 0 ​ 0 ​ 0 ​ 1,261 ​ 1,261 ​ 678 Loans secured by farmland ​ 0 ​ 0 ​ 0 ​ 478 ​ 478 ​ 48 Total with a related allowance recorded ​ 8,082 ​ 8,082 ​ 925 ​ 3,375 ​ 3,375 ​ 1,051 Total ​ $ 21,293 ​ $ 17,818 ​ $ 925 ​ $ 5,514 ​ $ 5,486 ​ $ 1,051
Schedule of average balance of impaired loans and interest income recognized on impaired loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Interest Income Recognized on ​ ​ Average Investment in ​ on Impaired Loans ​ ​ Impaired Loans ​ on a Cash Basis ​ ​ Year Ended December 31, ​ Year Ended December 31, ​ ​ 2020 ​ 2019 2020 2019 Residential mortgage: ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first lien ​ $ 1,853 ​ $ 1,440 ​ $ 116 ​ $ 87 Residential mortgage loans - junior lien ​ ​ 392 ​ ​ 288 ​ 22 ​ 12 Home equity lines of credit ​ ​ 57 ​ ​ 26 ​ 3 ​ 4 Total residential mortgage ​ ​ 2,302 ​ ​ 1,754 ​ 141 ​ 103 Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ ​ 5,266 ​ ​ 1,562 ​ 258 ​ 19 Commercial and industrial ​ ​ 2,542 ​ ​ 1,186 ​ 34 ​ 25 Commercial construction and land ​ ​ 521 ​ ​ 556 ​ 15 ​ 71 Loans secured by farmland ​ ​ 319 ​ ​ 1,276 ​ 27 ​ 49 Multi-family (5 or more) residential ​ ​ 202 ​ ​ 0 ​ ​ 0 ​ ​ 0 Agricultural loans ​ ​ 76 ​ ​ 399 ​ 4 ​ 31 Other commercial loans ​ ​ 18 ​ ​ 20 ​ 1 ​ 4 Total commercial ​ ​ 8,944 ​ ​ 4,999 ​ 339 ​ 199 Consumer ​ ​ 0 ​ ​ 3 ​ 0 ​ 0 Total ​ $ 11,246 ​ $ 6,756 ​ $ 480 ​ $ 302
Schedule of breakdown by portfolio segment and class of non accrual loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, 2020 ​ December 31, 2019 ​ ​ Past Due ​ ​ ​ ​ Past Due ​ ​ ​ ​ ​ 90+ Days and ​ ​ ​ ​ 90+ Days and ​ ​ ​ ​ Accruing Nonaccrual Accruing Nonaccrual Residential mortgage: ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 838 ​ $ 6,387 ​ $ 878 ​ $ 4,679 Residential mortgage loans - junior liens ​ 52 ​ 378 ​ 53 ​ 326 Home equity lines of credit ​ 233 ​ 299 ​ 71 ​ 73 Total residential mortgage ​ 1,123 ​ 7,064 ​ 1,002 ​ 5,078 Commercial: ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 395 ​ 11,550 ​ 107 ​ 1,148 Commercial and industrial ​ 142 ​ 970 ​ 15 ​ 1,051 Commercial construction and land ​ 0 ​ 49 ​ 0 ​ 1,311 Loans secured by farmland ​ 188 ​ 84 ​ 43 ​ 565 Multi-family (5 or more) residential ​ ​ 0 ​ ​ 1,614 ​ ​ 0 ​ ​ 0 Other commercial ​ 71 ​ 0 ​ 0 ​ 49 Total commercial ​ 796 ​ 14,267 ​ 165 ​ 4,124 Consumer ​ 56 ​ 85 ​ 40 ​ 16 Totals ​ $ 1,975 ​ $ 21,416 ​ $ 1,207 ​ $ 9,218
Summary of the contractual aging of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ As of December 31, 2020 ​ As of December 31, 2019 ​ Current & ​ ​ ​ ​ ​ ​ Current & ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ ​ ​ 30 Days ​ Days ​ Days ​ Total ​ 30 Days ​ Days ​ Days ​ Total Residential mortgage: ​ ​ ​ ​ ​ ​ ​ ​ Residential mortgage loans - first liens ​ $ 523,191 ​ $ 5,703 ​ $ 4,053 ​ $ 532,947 ​ $ 499,024 ​ $ 7,839 ​ $ 3,778 ​ $ 510,641 Residential mortgage loans - junior liens ​ 27,009 ​ 111 ​ 191 ​ 27,311 ​ 27,041 ​ 83 ​ 379 ​ 27,503 Home equity lines of credit ​ 38,919 ​ 101 ​ 281 ​ 39,301 ​ 33,115 ​ 452 ​ 71 ​ 33,638 1-4 Family residential construction ​ 20,457 ​ 156 ​ 0 ​ 20,613 ​ 14,758 ​ 40 ​ 0 ​ 14,798 Total residential mortgage ​ 609,576 ​ 6,071 ​ 4,525 ​ 620,172 ​ 573,938 ​ 8,414 ​ 4,228 ​ 586,580 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 529,998 ​ 66 ​ 1,746 ​ 531,810 ​ 299,640 ​ 737 ​ 850 ​ 301,227 Commercial and industrial ​ 158,523 ​ 55 ​ 999 ​ 159,577 ​ 126,221 ​ 16 ​ 137 ​ 126,374 Small Business Administration - Paycheck Protection Program ​ ​ 132,269 ​ ​ 0 ​ ​ 0 ​ ​ 132,269 ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 0 Political subdivisions ​ 53,221 ​ 0 ​ 0 ​ 53,221 ​ 53,570 ​ 0 ​ 0 ​ 53,570 Commercial construction and land ​ 42,590 ​ 284 ​ 0 ​ 42,874 ​ 33,505 ​ 0 ​ 50 ​ 33,555 Loans secured by farmland ​ 11,419 ​ 95 ​ 222 ​ 11,736 ​ 11,455 ​ 666 ​ 130 ​ 12,251 Multi-family (5 or more) residential ​ 53,860 ​ 1,951 ​ 0 ​ 55,811 ​ 31,070 ​ 0 ​ 0 ​ 31,070 Agricultural loans ​ 3,091 ​ 2 ​ 71 ​ 3,164 ​ 4,318 ​ 1 ​ 0 ​ 4,319 Other commercial loans ​ 17,289 ​ 0 ​ 0 ​ 17,289 ​ 16,535 ​ 0 ​ 0 ​ 16,535 Total commercial ​ 1,002,260 ​ 2,453 ​ 3,038 ​ 1,007,751 ​ 576,314 ​ 1,420 ​ 1,167 ​ 578,901 Consumer ​ 16,063 ​ 83 ​ 140 ​ 16,286 ​ 16,496 ​ 189 ​ 56 ​ 16,741 Totals ​ $ 1,627,899 ​ $ 8,607 ​ $ 7,703 ​ $ 1,644,209 ​ $ 1,166,748 ​ $ 10,023 ​ $ 5,451 ​ $ 1,182,222
Summary of the contractual aging of nonaccrual loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Current & ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ 30 Days Days Days Total December 31, 2020 Nonaccrual Totals ​ $ 12,999 ​ $ 2,689 ​ $ 5,728 ​ $ 21,416 December 31, 2019 Nonaccrual Totals ​ $ 3,840 ​ $ 1,134 ​ $ 4,244 ​ $ 9,218
Summary of troubled debt restructurings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Current & ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Past Due ​ Past Due ​ Past Due ​ ​ ​ ​ ​ ​ Less than ​ 30-89 ​ 90+ ​ ​ ​ ​ ​ 30 Days Days Days Nonaccrual Total December 31, 2020 Totals ​ $ 166 ​ $ 0 ​ $ 418 ​ $ 6,867 ​ $ 7,451 December 31, 2019 Totals ​ $ 889 ​ $ 0 ​ $ 0 ​ $ 1,737 ​ $ 2,626
Schedule of loan modifications considered as TDRs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 ​ ​ Number ​ ​ ​ ​ Number ​ ​ ​ ​ ​ of ​ Recorded ​ of ​ Recorded (Balances in Thousands) Loans Investment Loans Investment Residential mortgage - first liens 0 ​ $ 0 1 $ 261 Residential mortgage - junior liens 1 ​ 240 1 ​ 18 Commercial and industrial 0 ​ 0 8 ​ 170 Agricultural loans 0 ​ 0 1 ​ 81 Total 1 ​ $ 240 11 ​ $ 530
Schedule of carrying amount of foreclosed residential real estate properties	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, December 31, ​ ​ 2020 ​ 2019 Foreclosed residential real estate ​ $ 80 ​ $ 292
Schedule of mortgage loans secured by residential real properties	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ December 31, December 31, ​ ​ 2020 ​ 2019 Residential real estate in process of foreclosure ​ $ 1,246 ​ $ 1,717
Troubled Debt Restructuring
LOANS
Summary of troubled debt restructurings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Balances in Thousands) ​ 2020 2019 ​ ​ Post- ​ Post- ​ ​ Number ​ Modification Number ​ Modification ​ ​ of ​ Recorded of ​ Recorded ​ ​ Loans ​ Investment Loans ​ Investment Residential mortgage - junior liens: ​ ​ ​ Reduced monthly payments and extended maturity date 0 ​ $ 0 ​ 1 ​ $ 18 New loan at lower than risk-adjusted market rate to borrower from whom short sale of other collateral was accepted 1 ​ 30 ​ 0 ​ 0 Commercial loans secured by real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest only payments for a nine-month period ​ 1 ​ ​ 240 ​ 0 ​ ​ 0 Principal and interest payment deferral non-COVID related ​ 2 ​ ​ 4,831 ​ 0 ​ ​ 0 Extended interest only payments and reduced monthly payments with a balloon payment at maturity ​ 0 ​ ​ 0 ​ 1 ​ ​ 1,261 Commercial and industrial, ​ ​ ​ Reduced monthly payments and extended maturity date 0 ​ 0 ​ 9 ​ 448 Multi-family (5 or more) residential, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Principal and interest payment deferral non-COVID related ​ 3 ​ ​ 2,170 ​ 0 ​ ​ 0 Agricultural loans, ​ ​ ​ Reduced monthly payments and extended maturity date 0 ​ 0 ​ 1 ​ 84 Total 7 ​ $ 7,271 ​ 12 ​ $ 1,811

BANK PREMISES AND EQUIPMENT (Ta

BANK PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Property, Plant and Equipment [Table Text Block]	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, (In Thousands) ​ 2020 ​ 2019 Land ​ $ 3,826 ​ $ 3,199 Buildings and improvements ​ ​ 33,058 ​ ​ 28,403 Furniture and equipment ​ ​ 15,235 ​ ​ 13,618 Construction in progress ​ ​ 8 ​ ​ 1,655 Total ​ ​ 52,127 ​ ​ 46,875 Less: accumulated depreciation ​ ​ (30,601) ​ ​ (29,705) Net ​ $ 21,526 ​ $ 17,170
Schedule of Depreciation Expense [Table Text Block]	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ 2020 ​ 2019 Occupancy expense ​ $ 857 ​ $ 775 Furniture and equipment expense ​ ​ 738 ​ ​ 692 Data processing expenses ​ ​ 338 ​ ​ 239 Telecommunications expenses ​ ​ 48 ​ ​ 43 Total ​ $ 1,981 ​ $ 1,749

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS, NET (Tables)	12 Months Ended
	Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS, NET
Schedule of core deposit intangibles	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, ​ 2020 ​ 2019 Gross amount ​ $ 6,639 ​ $ 3,495 Accumulated amortization ​ (2,788) ​ (2,248) Net ​ $ 3,851 ​ $ 1,247
Schedule of amortization expense related to core deposit intangibles is included in other noninterest expense in the consolidated statements of income	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Year Ended ​ ​ December 31, ​ December 31, ​ ​ 2020 ​ 2019 Amortization expense ​ $ 540 ​ $ 223
Schedule of changes in the carrying amount of goodwill	​ ​ ​ ​ ​ ​ ​ (In Thousands) Year Ended ​ December 31, ​ December 31, ​ 2020 ​ 2019 Balance, beginning of period $ 28,388 ​ $ 11,942 Goodwill arising in business combination ​ 24,117 ​ ​ 16,446 Balance, end of period $ 52,505 ​ $ 28,388

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Scheduled maturities of time deposits	​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ 2021 ​ $ 262,358 2022 ​ ​ 76,447 2023 ​ ​ 27,730 2024 ​ ​ 12,621 2025 ​ ​ 11,192 2026 ​ ​ 59 Total ​ $ 390,407 ​
Schedule of remaining maturities of time deposits in excess of $250,000	​ ​ ​ ​ ​ (In Thousands) ​ ​ ​ Three months or less ​ $ 25,566 Over 3 months through 12 months ​ ​ 54,883 Over 1 year through 3 years ​ ​ 15,574 Over 3 years ​ ​ 7,001 Total ​ $ 103,024

BORROWED FUNDS AND SUBORDINAT_2

BORROWED FUNDS AND SUBORDINATED DEBT (Tables)	12 Months Ended
	Dec. 31, 2020
BORROWED FUNDS AND SUBORDINATED DEBT
Schedule of short term borrowings	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 FHLB-Pittsburgh borrowings ​ $ 18,066 ​ $ 84,292 Customer repurchase agreements ​ 1,956 ​ 1,928 Total short-term borrowings ​ $ 20,022 ​ $ 86,220 ​ Short-term borrowings from FHLB-Pittsburgh are as follows: ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Overnight borrowing ​ $ 0 ​ $ 64,000 Other short-term advances ​ 18,066 ​ 20,292 Total short-term FHLB-Pittsburgh borrowings ​ $ 18,066 ​ $ 84,292 ​
Schedule of long term borrowings	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Loans matured in 2020 with a weighted-average rate of 2.71% ​ $ 0 ​ $ 5,069 Loans maturing in 2021 with a weighted-average rate of 1.36% ​ ​ 26,098 ​ ​ 6,000 Loans maturing in 2022 with a weighted-average rate of 0.60% ​ ​ 15,682 ​ ​ 20,000 Loans maturing in 2023 with a weighted-average rate of 0.73% ​ ​ 7,224 ​ ​ 20,500 Loans maturing in 2024 with a weighted-average rate of 0.75% ​ ​ 5,137 ​ ​ 0 Loan maturing in 2025 with a rate of 4.91% ​ ​ 467 ​ ​ 558 Total long-term FHLB-Pittsburgh borrowings ​ $ 54,608 ​ $ 52,127
Schedule of outstanding subordinated debt	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) December 31, December 31, ​ ​ 2020 ​ 2019 Agreements with an aggregate par value of $8,000,000; bearing interest at 6.25%; maturing in June 2026 and redeemable at par in June 2021 ​ $ 8,027 ​ $ 0 Agreements with an aggregate par value of $6,500,000; bearing interest at 6.50%; maturing in April 2027 and redeemable at par in April 2022 ​ ​ 6,500 ​ ​ 6,500 Agreement with a par value of $2,000,000; bearing interest at 6.50%; maturing in July 2027 and redeemable at par in July 2022 ​ ​ 2,026 ​ ​ 0 Total carrying value ​ $ 16,553 ​ $ 6,500

EMPLOYEE AND POSTRETIREMENT B_2

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of funded status of the defined benefit plans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Postretirement (In Thousands) 2020 2019 2020 2019 CHANGE IN BENEFIT OBLIGATION: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Benefit obligation at beginning of year ​ $ 976 ​ $ 870 ​ $ 1,326 ​ $ 1,349 Service cost ​ 0 ​ 0 ​ 46 ​ 33 Interest cost ​ 23 ​ 28 ​ 39 ​ 50 Plan participants' contributions ​ 0 ​ 0 ​ 185 ​ 184 Actuarial loss (gain) ​ 108 ​ 91 ​ 11 ​ (63) Benefits paid ​ (6) ​ (13) ​ (260) ​ (227) Benefit obligation at end of year ​ $ 1,101 ​ $ 976 ​ $ 1,347 ​ $ 1,326 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ CHANGE IN PLAN ASSETS: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value of plan assets at beginning of year ​ $ 971 ​ $ 847 ​ $ 0 ​ $ 0 Actual return on plan assets ​ 97 ​ 137 ​ 0 ​ 0 Employer contribution ​ 0 ​ 0 ​ 75 ​ 43 Plan participants' contributions ​ 0 ​ 0 ​ 185 ​ 184 Benefits paid ​ (6) ​ (13) ​ (260) ​ (227) Fair value of plan assets at end of year ​ $ 1,062 ​ $ 971 ​ $ 0 ​ $ 0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Funded status at end of year ​ $ (39) ​ $ (5) ​ $ (1,347) ​ $ (1,326)
Schedule of pension plan and postretirement plan liability amounts were recognized in the consolidated balance sheets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement (In Thousands) 2020 2019 2020 2019 Accrued interest and other liabilities ​ $ 39 ​ $ 5 ​ $ 1,347 ​ $ 1,326
Summary of items not yet recognized as a component of net periodic benefit cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement (In Thousands) 2020 2019 2020 2019 Prior service cost ​ $ 0 ​ $ 0 ​ $ (217) ​ $ (248) Net actuarial loss (gain) ​ 277 ​ 255 ​ (211) ​ (236) Total ​ $ 277 ​ $ 255 ​ $ (428) ​ $ (484)
Summary of components of net periodic benefit costs from defined benefit plans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement (In Thousands) 2020 2019 2020 2019 Service cost ​ $ 0 ​ $ 0 ​ $ 46 ​ $ 33 Interest cost ​ 23 ​ 28 ​ 39 ​ 50 Expected return on plan assets ​ (27) ​ (22) ​ 0 ​ 0 Amortization of prior service cost ​ 0 ​ 0 ​ (31) ​ (31) Recognized net actuarial loss (gain) ​ 16 ​ 20 ​ (14) ​ (21) Total net periodic benefit cost ​ $ 12 ​ $ 26 ​ $ 40 ​ $ 31
Schedule of weighted-average assumptions used to determine net periodic benefit cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension ​ Postretirement ​ 2020 2019 2020 2019 Citizens Trust Company Retirement Plan and postretirement plan: ​ ​ ​ ​ Discount rate 3.10 % 4.10 % 3.25 % 4.50 % Expected return on plan assets 4.99 % 4.68 % N/A N/A ​ Rate of compensation increase N/A N/A N/A N/A ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Postretirement ​ ​ 2020 2019 2020 2019 ​ Discount rate 2.30 % 3.10 % 2.50 % 3.25 % Rate of compensation increase N/A N/A N/A N/A ​
Schedule of Estimated future benefit payments	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) Pension Postretirement 2021 ​ $ 499 ​ $ 79 2022 ​ 8 ​ 85 2023 ​ 192 ​ 77 2024 ​ 8 ​ 83 2025 ​ 8 ​ 83 2026-2030 ​ 367 ​ 407
Schedule of fair values of pension plan assets	​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 Mutual funds invested principally in: ​ ​ ​ ​ Cash and cash equivalents 2 % 3 % Debt securities 36 % 38 % Equity securities 51 % 49 % Alternative funds 11 % 10 % Total 100 % 100 %
Schedule of stock-based compensation expense	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Restricted stock ​ $ 1,050 ​ $ 798 Stock options ​ 0 ​ 0 Total ​ $ 1,050 ​ $ 798
Summary of non-vested restricted stock activity	​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ Average ​ ​ Number ​ Grant Date ​ of Shares Fair Value Outstanding, December 31, 2019 68,200 ​ $ 24.53 Granted 70,940 ​ $ 23.18 Vested (31,908) ​ $ 24.97 Forfeited (5,290) ​ $ 25.09 Outstanding, December 31, 2020 101,942 ​ $ 23.42
Summary of stock option activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 2019 ​ ​ ​ ​ Weighted ​ ​ ​ Weighted ​ ​ ​ ​ Average ​ ​ ​ Average ​ ​ ​ ​ Exercise ​ ​ ​ Exercise ​ Shares Price Shares Price Outstanding, beginning of year 75,897 ​ $ 18.69 115,714 ​ $ 18.49 Granted 0 ​ ​ 0 ​ Exercised (17,222) ​ $ 18.25 (31,304) ​ $ 17.65 Forfeited (1,564) ​ $ 15.06 0 ​ Expired 0 ​ ​ ​ (8,513) ​ $ 19.88 Outstanding, end of year 57,111 ​ $ 18.92 75,897 ​ $ 18.69 Options exercisable at year-end 57,111 ​ $ 18.92 75,897 ​ $ 18.69 Weighted-average fair value of options forfeited ​ ​ $ 4.26 ​ N/A
Restricted Stock
Notes Tables
Summary of awarded shares of restricted stock under the Stock Incentive Plan,	​ ​ ​ ​ ​ ​ ​ 2020 2019 Time-based awards to independent directors ​ 7,580 ​ 7,620 Time-based awards to employees 45,457 26,827 Performance-based awards to employees 17,903 13,690 Total 70,940 48,137

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of deferred tax assets and deferred tax liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, (In Thousands) 2020 2019 Deferred tax assets: ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ $ 2,154 ​ $ 2,080 Purchase accounting adjustments on loans ​ 1,930 ​ 640 Net operating loss carryforward ​ ​ 896 ​ ​ 0 Operating leases liability ​ ​ 724 ​ ​ 344 Other deferred tax assets ​ 3,089 ​ 2,173 Total deferred tax assets ​ 8,793 ​ 5,237 ​ ​ ​ ​ ​ ​ ​ Deferred tax liabilities: ​ ​ Unrealized holding gains on securities ​ 3,104 ​ 934 Defined benefit plans - ASC 835 ​ 32 ​ 49 Bank premises and equipment ​ 1,216 ​ 763 Core deposit intangibles ​ 840 ​ 272 Right-of-use assets from operating leases ​ ​ 724 ​ ​ 344 Other deferred tax liabilities ​ 172 ​ 257 Total deferred tax liabilities ​ 6,088 ​ 2,619 Deferred tax asset, net ​ $ 2,705 ​ $ 2,618
Schedule of components of income tax expense	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Currently payable ​ $ 4,230 ​ $ 3,618 Tax expense resulting from allocations of certain tax benefits to equity or as a reduction in other assets ​ 121 ​ 115 Deferred ​ (361) ​ 172 Total provision ​ $ 3,990 ​ $ 3,905
Schedule of reconciliation of income tax	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 (Dollars In Thousands) Amount % Amount % Expected provision ​ $ 4,875 21.0 ​ $ 4,916 21.0 Tax-exempt interest income ​ (808) (3.5) ​ (853) (3.6) Increase in cash surrender value and other income from life insurance, net ​ (170) (0.7) ​ (91) (0.4) ESOP Dividends ​ (110) (0.5) ​ (113) (0.5) State income tax, net of Federal benefit ​ 172 0.7 ​ 122 0.5 Other, net ​ 31 0.1 ​ (76) (0.3) Effective income tax provision ​ $ 3,990 17.2 ​ $ 3,905 16.7

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of loans to executive officers and directors and associates	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning New ​ Other Ending (In Thousands) Balance Loans Repayments Changes Balance 13 directors, 9 executive officers 2020 ​ $ 14,455 ​ $ 242 ​ $ (2,150) ​ $ 5,898 ​ $ 18,445 11 directors, 8 executive officers 2019 ​ $ 15,144 ​ $ 1,027 ​ $ (1,850) ​ $ 134 ​ $ 14,455

OFF-BALANCE SHEET RISK (Tables)

OFF-BALANCE SHEET RISK (Tables)	12 Months Ended
	Dec. 31, 2020
Notes Tables
Schedule of financial instruments whose contract amounts represent credit risk	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Commitments to extend credit ​ $ 317,470 ​ $ 256,896 Standby letters of credit ​ 9,107 ​ 8,446
Schedule of expirations of standby letters of credit	​ ​ ​ ​ ​ Year of Expiration (In Thousands) 2021 ​ $ 8,701 2022 ​ 406 Total ​ $ 9,107

OPERATING LEASE COMMITMENTS A_2

OPERATING LEASE COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2020
OPERATING LEASE COMMITMENTS AND CONTINGENCIES
Schedule of balance sheet information relating to operating leases	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, (In Thousands) 2020 2019 Other assets ​ $ 3,446 ​ $ 1,637 Other liabilities ​ $ 3,446 ​ $ 1,637
Schedule of operating lease expenses	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) 2020 2019 Occupancy expense, net ​ $ 342 ​ $ 214 Furniture and equipment expense ​ 29 ​ 37 Total ​ $ 371 ​ $ 251
Schedule of operating lease maturities	Lease Payments Due ​ ​ ​ ​ ​ 2021 $ 484 2022 ​ 465 2023 ​ 453 2024 ​ 446 2025 ​ 426 Thereafter ​ 1,494 Total lease payments ​ 3,768 Discount on cash flows ​ (322) Total lease liabilities ​ $ 3,446

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	12 Months Ended
	Dec. 31, 2020
REGULATORY MATTERS
Schedule of capital ratios	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum To Be Well ​ ​ ​ ​ ​ ​ ​ Minimum ​ Minimum To Maintain ​ Capitalized Under ​ Minimum To Meet ​ ​ ​ ​ ​ Capital ​ Capital Conservation ​ Prompt Corrective ​ the Corporation's ​ ​ Actual ​ Requirement Buffer at Reporting Date ​ Action Provisions ​ Policy Thresholds ​ (Dollars In Thousands) ​ Amount Ratio Amount Ratio Amount Ratio Amount Ratio Amount Ratio ​ December 31, 2020: ​ ​ ​ Total capital to risk-weighted assets: ​ ​ ​ Consolidated ​ $ 260,015 17.49 % N/A N/A N/A N/A N/A N/A ​ $ 156,113 ≥ 1 0 . 5 % C&N Bank ​ 236,943 15.98 % 118,602 ≥ 8 % 155,665 ≥ 1 0 . 5 % 148,252 ≥ 1 0 % 155,665 ≥ 1 0 . 5 % Tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 231,577 15.58 % N/A N/A N/A N/A N/A N/A ​ 126,377 ≥ 8 . 5 % C&N Bank ​ 225,058 15.18 % 88,951 ≥ 6 % 126,015 ≥ 8 . 5 % 118,602 ≥ 8 % 126,015 ≥ 8 . 5 % Common equity tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 231,577 15.58 % N/A N/A N/A N/A N/A N/A ​ 104,075 ≥ 7 % C&N Bank ​ 225,058 15.18 % 66,714 ≥ 4 . 5 % 103,777 ≥ 7 . 0 % 96,364 ≥ 6 . 5 % 103,777 ≥ 7 % Tier 1 capital to average assets: ​ ​ ​ Consolidated ​ 231,577 10.34 % N/A N/A N/A N/A N/A N/A ​ 179,206 ≥ 8 % C&N Bank ​ 225,058 10.12 % 88,959 ≥ 4 % N/A N/A 111,199 ≥ 5 % 177,919 ≥ 8 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019: ​ ​ ​ Total capital to risk-weighted assets: ​ ​ ​ Consolidated ​ $ 228,057 20.70 % N/A N/A N/A N/A N/A N/A ​ $ 115,689 ≥ 1 0 . 5 % C&N Bank ​ 205,863 18.75 % 87,817 ≥ 8 % 115,260 ≥ 1 0 . 5 % 109,771 ≥ 1 0 % 115,260 ≥ 1 0 . 5 % Tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 211,388 19.19 % N/A N/A N/A N/A N/A N/A ​ 93,653 ≥ 8 . 5 % C&N Bank ​ 195,694 17.83 % 65,863 ≥ 6 % 93,306 ≥ 8 . 5 % 87,817 ≥ 8 % 93,306 ≥ 8 . 5 % Common equity tier 1 capital to risk-weighted assets: ​ ​ ​ Consolidated ​ 211,388 19.19 % N/A N/A N/A N/A N/A N/A ​ 77,126 ≥ 7 % C&N Bank ​ 195,694 17.83 % 49,397 ≥ 4 . 5 % 76,840 ≥ 7 . 0 % 71,351 ≥ 6 . 5 % 76,840 ≥ 7 % Tier 1 capital to average assets: ​ ​ ​ Consolidated ​ 211,388 13.10 % N/A N/A N/A N/A N/A N/A ​ 129,126 ≥ 8 % C&N Bank ​ 195,694 12.24 % 63,940 ≥ 4 % N/A N/A 79,925 ≥ 5 % 127,879 ≥ 8 %
Schedule of minimum risk-based capital ratios, and the capital ratios including the capital conservation buffer	​ ​ ​ ​ ​ Minimum common equity tier 1 capital ratio 4.5 % Minimum common equity tier 1 capital ratio plus capital conservation buffer 7.0 % Minimum tier 1 capital ratio 6.0 % Minimum tier 1 capital ratio plus capital conservation buffer 8.5 % Minimum total capital ratio 8.0 % Minimum total capital ratio plus capital conservation buffer 10.5 %
Schedule of summary of payout restrictions based on the capital conservation buffer	​ ​ ​ ​ ​ Capital Conservation Buffer Maximum Payout (as a % of risk-weighted assets) ​ (as a % of eligible retained income) Greater than 2.5% No payout limitation applies ≤2.5% and >1.875% ​ 60% ​ ≤1.875% and >1.25% ​ 40% ​ ≤1.25% and >0.625% ​ 20% ​ ≤0.625% ​ 0% ​

PARENT COMPANY ONLY (Tables)

PARENT COMPANY ONLY (Tables)	12 Months Ended
	Dec. 31, 2020
PARENT COMPANY ONLY
Schedule of parent company condensed balance sheet	​ ​ ​ ​ ​ ​ ​ ​ CONDENSED BALANCE SHEET Dec. 31, Dec. 31, (In Thousands) ​ 2020 ​ 2019 ASSETS ​ ​ Cash ​ $ 7,246 ​ $ 6,485 Investment in subsidiaries: ​ ​ Citizens & Northern Bank ​ 292,455 ​ 228,413 Citizens & Northern Investment Corporation ​ 12,959 ​ 12,353 Bucktail Life Insurance Company ​ 3,804 ​ 3,669 Other assets ​ 4 ​ 109 TOTAL ASSETS ​ $ 316,468 ​ $ 251,029 ​ ​ ​ ​ ​ ​ ​ LIABILITIES AND STOCKHOLDERS' EQUITY ​ ​ Subordinated debt ​ $ 16,553 ​ $ 6,500 Other liabilities ​ 159 ​ 77 Stockholders' equity ​ 299,756 ​ 244,452 TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY ​ $ 316,468 ​ $ 251,029
Schedule of parent company condensed income statement	​ ​ ​ ​ ​ ​ ​ ​ CONDENSED INCOME STATEMENT ​ ​ ​ (In Thousands) 2020 2019 Dividends from Citizens & Northern Bank ​ $ 38,507 ​ $ 24,600 Expenses ​ (1,488) ​ (1,086) Income before distributions in excess of income from subsidiaries ​ 37,019 ​ 23,514 Distributions in excess of income from subsidiaries ​ (17,797) ​ (4,010) NET INCOME ​ $ 19,222 ​ $ 19,504
Schedule of parent company condensed statement of cash flows	​ ​ ​ ​ ​ ​ ​ ​ CONDENSED STATEMENT OF CASH FLOWS ​ ​ ​ (In Thousands) 2020 2019 CASH FLOWS FROM OPERATING ACTIVITIES: ​ ​ ​ ​ ​ ​ Net income ​ $ 19,222 ​ $ 19,504 Adjustments to reconcile net income to net cash provided by operating activities: ​ ​ Accretion of purchase accounting adjustment ​ ​ (38) ​ ​ 0 Loss on repayment of subordinated debt ​ 0 ​ 10 Distributions in excess of income from subsidiaries ​ 17,797 ​ 4,010 Decrease (increase) in other assets ​ 105 ​ (107) Increase (decrease) in other liabilities ​ 13 ​ (81) Net Cash Provided by Operating Activities ​ 37,099 ​ 23,336 ​ ​ ​ ​ ​ ​ ​ CASH FLOWS FROM INVESTING ACTIVITIES, ​ ​ Net cash used in business combination ​ (21,837) ​ (9,698) ​ ​ ​ ​ ​ ​ ​ CASH FLOWS FROM FINANCING ACTIVITIES: ​ ​ Repayment of subordinated debt ​ 0 ​ (510) Proceeds from sale of treasury stock ​ 131 ​ 198 Purchase of treasury stock ​ (163) ​ (189) Dividends paid ​ (14,469) ​ (14,041) Net Cash Used in Financing Activities ​ (14,501) ​ (14,542) ​ ​ ​ ​ ​ ​ ​ INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS ​ 761 ​ (904) CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR ​ 6,485 ​ 7,389 CASH AND CASH EQUIVALENTS, END OF YEAR ​ $ 7,246 ​ $ 6,485 ​ ​ ​ ​ ​ ​ ​ SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: ​ ​ Investment of net assets acquired in business combination in Citizens & Northern Bank ​ $ 73,426 ​ $ 49,765 Common equity issued in business combination ​ $ 41,429 ​ $ 32,953 Subordinated debt assumed in business combination ​ $ 10,091 ​ $ 7,000 Other liabilities assumed in business combination ​ $ 69 ​ $ 114 Interest paid ​ $ 655 ​ $ 461

SUMMARY OF QUARTERLY CONSOLID_2

SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA
Summarized quarterly financial data	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Quarter Ended ​ ​ March 31, ​ June 30, ​ Sept. 30, ​ Dec. 31, (In Thousands Except Per Share Data) (Unaudited) 2020 2020 2020 2020 Interest income ​ $ 17,037 ​ $ 16,513 ​ $ 21,751 ​ $ 21,859 Interest expense ​ 2,755 ​ 2,267 ​ 2,469 ​ 2,104 Net interest income ​ 14,282 ​ 14,246 ​ 19,282 ​ 19,755 Provision (credit) for loan losses ​ 1,528 ​ (176) ​ 1,941 ​ 620 Net interest income after provision (credit) for loan losses ​ 12,754 ​ 14,422 ​ 17,341 ​ 19,135 Other income ​ 5,281 ​ 5,528 ​ 6,970 ​ 6,565 Net gains on available-for-sale debt securities ​ 0 ​ 0 ​ 25 ​ 144 Loss on prepayment of borrowings ​ ​ 0 ​ ​ 0 ​ ​ 0 ​ ​ 1,636 Merger-related expenses ​ 141 ​ 983 ​ 6,402 ​ 182 Other expenses ​ 12,912 ​ 12,274 ​ 14,648 ​ 15,775 Income before income tax provision ​ 4,982 ​ 6,693 ​ 3,286 ​ 8,251 Income tax provision ​ 816 ​ 1,255 ​ 438 ​ 1,481 Net income ​ $ 4,166 ​ $ 5,438 ​ $ 2,848 ​ $ 6,770 Net income attributable to common shares ​ $ 4,146 ​ $ 5,405 ​ $ 2,830 ​ $ 6,727 Net income per share – basic ​ $ 0.30 ​ $ 0.39 ​ $ 0.18 ​ $ 0.43 Net income per share – diluted ​ $ 0.30 ​ $ 0.39 ​ $ 0.18 ​ $ 0.43 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 Quarter Ended ​ ​ March 31, ​ June 30, ​ Sept. 30, ​ Dec. 31, ​ 2019 2019 2019 2019 Interest income ​ $ 13,065 ​ $ 17,139 ​ $ 17,277 ​ $ 17,290 Interest expense ​ 1,350 ​ 2,934 ​ 3,000 ​ 2,999 Net interest income ​ 11,715 ​ 14,205 ​ 14,277 ​ 14,291 (Credit) provision for loan losses ​ (957) ​ (4) ​ 1,158 ​ 652 Net interest income after (credit) provision for loan losses ​ 12,672 ​ 14,209 ​ 13,119 ​ 13,639 Other income ​ 4,406 ​ 4,849 ​ 4,963 ​ 5,066 Net gains on available-for-sale debt securities ​ 0 ​ 7 ​ 13 ​ 3 Merger-related expenses ​ 311 ​ 3,301 ​ 206 ​ 281 Other expenses ​ 10,696 ​ 11,422 ​ 11,486 ​ 11,834 Income before income tax provision ​ 6,071 ​ 4,342 ​ 6,403 ​ 6,593 Income tax provision ​ 981 ​ 693 ​ 1,096 ​ 1,135 Net income ​ $ 5,090 ​ $ 3,649 ​ $ 5,307 ​ $ 5,458 Net income attributable to common shares ​ $ 5,063 ​ $ 3,630 ​ $ 5,281 ​ $ 5,431 Net income per share – basic ​ $ 0.41 ​ $ 0.27 ​ $ 0.39 ​ $ 0.40 Net income per share – diluted ​ $ 0.41 ​ $ 0.27 ​ $ 0.39 ​ $ 0.40

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2020
DERIVATIVE FINANCIAL INSTRUMENTS
Summary of fair value of the Corporation's derivative financial instruments as well as their classification on the consolidated balance sheet	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) At December 31, 2020 ​ Asset Derivatives ​ Liability Derivatives ​ Notional ​ Fair ​ Notional ​ Fair ​ Amount ​ Value (1) ​ Amount ​ Value (2) Interest rate swap agreements $ 67,870 ​ $ 6,566 ​ $ 67,870 ​ $ 6,566 ​ (1) Included in other assets in the consolidated balance sheets. (2) Included in accrued interest and other liabilities in the consolidated balance sheets.

FAIR VALUE MEASUREMENTS AND F_2

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2020
FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS
Schedule of assets measured at fair value and the valuation methods used	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ Prices ​ Other ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Observable ​ Unobservable ​ Total ​ ​ Markets ​ Inputs ​ Inputs ​ Fair (In Thousands) ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Value Recurring fair value measurements, assets: ​ ​ ​ ​ AVAILABLE-FOR-SALE DEBT SECURITIES: ​ ​ ​ ​ Obligations of the U.S. Treasury ​ $ 0 ​ $ 12,182 ​ $ 0 ​ $ 12,182 Obligations of U.S. Government agencies ​ ​ 0 ​ ​ 26,344 ​ ​ 0 ​ ​ 26,344 Obligations of states and political subdivisions: ​ ​ ​ ​ ​ ​ Tax-exempt ​ 0 ​ 122,401 ​ 0 ​ 122,401 Taxable ​ 0 ​ 47,452 ​ 0 ​ 47,452 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 0 ​ 38,176 ​ 0 ​ 38,176 Residential collateralized mortgage obligations ​ 0 ​ 57,467 ​ 0 ​ 57,467 Commercial mortgage-backed securities ​ 0 ​ 45,310 ​ 0 ​ 45,310 Total available-for-sale debt securities ​ 0 ​ 349,332 ​ 0 ​ 349,332 Marketable equity security ​ 1,000 ​ 0 ​ 0 ​ 1,000 Servicing rights ​ 0 ​ 0 ​ 1,689 ​ 1,689 Interest rate swap agreements, assets ​ ​ 0 ​ ​ 6,566 ​ ​ 0 ​ ​ 6,566 Total recurring fair value measurements, assets ​ $ 1,000 ​ $ 355,898 ​ $ 1,689 ​ $ 358,587 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recurring fair value measurements, liabilities, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest rate swap agreements, liabilities ​ $ 0 ​ $ 6,566 ​ $ 0 ​ $ 6,566 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonrecurring fair value measurements, assets: ​ ​ ​ ​ Impaired loans with a valuation allowance ​ $ 0 ​ $ 0 ​ $ 8,082 ​ $ 8,082 Valuation allowance ​ 0 ​ 0 ​ (925) ​ (925) Impaired loans, net ​ 0 ​ 0 ​ 7,157 ​ 7,157 Foreclosed assets held for sale ​ 0 ​ 0 ​ 1,338 ​ 1,338 Total nonrecurring fair value measurements, assets ​ $ 0 ​ $ 0 ​ $ 8,495 ​ $ 8,495 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ Prices ​ Other ​ ​ ​ ​ ​ ​ ​ ​ in Active ​ Observable ​ Unobservable ​ Total ​ ​ Markets ​ Inputs ​ Inputs ​ Fair (In Thousands) ​ (Level 1) ​ (Level 2) ​ (Level 3) ​ Value Recurring fair value measurements, assets: ​ ​ ​ ​ AVAILABLE-FOR-SALE DEBT SECURITIES: ​ ​ ​ ​ Obligations of U.S. Government agencies ​ $ 0 ​ $ 17,000 ​ $ 0 ​ $ 17,000 Obligations of states and political subdivisions: ​ ​ ​ ​ Tax-exempt ​ 0 ​ 70,760 ​ 0 ​ 70,760 Taxable ​ 0 ​ 36,303 ​ 0 ​ 36,303 Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies: ​ ​ ​ ​ Residential pass-through securities ​ 0 ​ 59,210 ​ 0 ​ 59,210 Residential collateralized mortgage obligations ​ 0 ​ 114,723 ​ 0 ​ 114,723 Commercial mortgage-backed securities ​ 0 ​ 48,727 ​ 0 ​ 48,727 Total available-for-sale debt securities ​ 0 ​ 346,723 ​ 0 ​ 346,723 Marketable equity security ​ 979 ​ 0 ​ 0 ​ 979 Servicing rights ​ 0 ​ 0 ​ 1,277 ​ 1,277 Total recurring fair value measurements ​ $ 979 ​ $ 346,723 ​ $ 1,277 ​ $ 348,979 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Nonrecurring fair value measurements, assets ​ ​ ​ ​ Impaired loans with a valuation allowance ​ $ 0 ​ $ 0 ​ $ 3,375 ​ $ 3,375 Valuation allowance ​ 0 ​ 0 ​ (1,051) ​ (1,051) Impaired loans, net ​ 0 ​ 0 ​ 2,324 ​ 2,324 Foreclosed assets held for sale ​ 0 ​ 0 ​ 2,886 ​ 2,886 Total nonrecurring fair value measurements, assets ​ $ 0 ​ $ 0 ​ $ 5,210 ​ $ 5,210
Schedule of reconciliation of level 3 activity	​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Years Ended December 31, ​ 2020 2019 Servicing rights balance, beginning of period ​ $ 1,277 ​ $ 1,404 Originations of servicing rights ​ 988 ​ 204 Unrealized losses included in earnings ​ (576) ​ (331) Servicing rights balance, end of period ​ $ 1,689 ​ $ 1,277
Schedule of estimated fair values, and carrying amounts of financial instruments not recorded at fair value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (In Thousands) ​ Fair Value ​ December 31, 2020 ​ December 31, 2019 ​ ​ Hierarchy ​ Carrying ​ Fair ​ Carrying ​ Fair ​ Level Amount Value Amount Value Financial assets: ​ ​ ​ ​ Cash and cash equivalents Level 1 ​ $ 96,017 ​ $ 96,017 ​ $ 31,122 ​ $ 31,122 Certificates of deposit Level 2 ​ 5,840 ​ 6,054 ​ 4,080 ​ 4,227 Restricted equity securities (included in Other Assets) Level 2 ​ 9,970 ​ 9,970 ​ 10,321 ​ 10,321 Loans, net Level 3 ​ 1,632,824 ​ 1,646,207 ​ 1,172,386 ​ 1,181,000 Accrued interest receivable Level 2 ​ 8,293 ​ 8,293 ​ 5,001 ​ 5,001 Interest rate swap agreements Level 2 ​ 6,566 ​ 6,566 ​ 0 ​ 0 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ Deposits with no stated maturity Level 2 ​ 1,430,062 ​ 1,430,062 ​ 877,965 ​ 877,965 Time deposits Level 2 ​ 390,407 ​ 393,566 ​ 374,695 ​ 376,738 Short-term borrowings Level 2 ​ 20,022 ​ 19,974 ​ 86,220 ​ 86,166 Long-term borrowings Level 2 ​ 54,608 ​ 55,723 ​ 52,127 ​ 52,040 Subordinated debt ​ Level 2 ​ ​ 16,553 ​ ​ 16,680 ​ ​ 6,500 ​ ​ 6,499 Accrued interest payable Level 2 ​ 390 ​ 390 ​ 311 ​ 311 Interest rate swap agreements Level 2 ​ 6,566 ​ 6,566 ​ 0 ​ 0
Recurring fair value measurements
FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS
Schedule of inputs and valuation techniques	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value at ​ ​ ​ 12/31/2020 ​ Valuation ​ Unobservable ​ ​ ​ ​ Method or Value As of Asset ​ (In Thousands) ​ Technique ​ Input(s) ​ ​ ​ ​ 12/31/2020 Servicing rights ​ $ 1,689 Discounted cash flow Discount rate ​ 13.00 % Rate used through modeling period ​ ​ ​ ​ ​ Loan prepayment speeds ​ ​ 277.00 % Weighted-average PSA ​ ​ ​ ​ ​ Servicing fees ​ ​ 0.25 % of loan balances ​ ​ ​ ​ ​ ​ ​ ​ ​ 4.00 % of payments are late ​ ​ ​ ​ ​ ​ ​ ​ ​ 5.00 % late fees assessed ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 1.94 ​ Miscellaneous fees per account per month ​ ​ ​ ​ ​ Servicing costs ​ $ 6.00 ​ Monthly servicing cost per account ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 24.00 ​ Additional monthly servicing cost per loan on loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ ​ 1.50 % of loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ 3.00 % annual increase in servicing costs ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value at ​ ​ ​ 12/31/2019 ​ Valuation ​ Unobservable ​ ​ ​ ​ Method or Value As of Asset ​ (In Thousands) ​ Technique ​ Input(s) ​ ​ ​ ​ 12/31/2019 Servicing rights ​ $ 1,277 Discounted cash flow Discount rate ​ 12.50 % Rate used through modeling period ​ ​ ​ ​ ​ Loan prepayment speeds ​ ​ 183.00 % Weighted-average PSA ​ ​ ​ ​ ​ Servicing fees ​ ​ 0.25 % of loan balances ​ ​ ​ ​ ​ ​ ​ ​ ​ 4.00 % of payments are late ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 5.00 % late fees assessed ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 1.94 Miscellaneous fees per account per month ​ ​ ​ ​ ​ ​ Servicing costs ​ $ 6.00 ​ Monthly servicing cost per account ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 24.00 ​ Additional monthly servicing cost per loan on loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1.50 % of loans more than 30 days delinquent ​ ​ ​ ​ ​ ​ ​ ​ 3.00 % annual increase in servicing costs
Nonrecurring fair value measurements
FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS
Schedule of inputs and valuation techniques	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars In Thousands) ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ Valuation ​ ​ ​ ​ ​ Average ​ ​ Balance at ​ Allowance at ​ Fair Value at ​ Valuation ​ Unobservable ​ Discount at Asset ​ 12/31/2020 ​ 12/31/2020 ​ 12/31/2020 ​ Technique ​ Inputs ​ 12/31/2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired loans: ​ ​ ​ ​ Residential mortgage loans - first and junior liens ​ $ 1,509 ​ $ 162 ​ $ 1,347 Sales comparison Discount to appraised value 31 % Commercial: ​ ​ ​ ​ ​ ​ ​ Commercial loans secured by real estate ​ 6,501 ​ 691 ​ 5,810 Sales comparison Discount to appraised value 28 % Commercial and industrial ​ 72 ​ 72 ​ 0 Liquidation of assets Discount to appraised value 100 % Total impaired loans ​ $ 8,082 ​ $ 925 ​ $ 7,157 ​ Foreclosed assets held for sale - real estate: ​ ​ ​ ​ Residential (1-4 family) ​ $ 80 ​ $ 0 ​ $ 80 Sales comparison Discount to appraised value 36 % Commercial real estate ​ 1,258 ​ 0 ​ 1,258 Sales comparison Discount to appraised value 44 % Total foreclosed assets held for sale ​ $ 1,338 ​ $ 0 ​ $ 1,338 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars In Thousands) ​ ​ ​ ​ Weighted ​ ​ ​ ​ Valuation ​ ​ ​ ​ ​ Average ​ ​ Balance at ​ Allowance at ​ Fair Value at ​ Valuation ​ Unobservable ​ Discount at Asset ​ 12/31/2019 ​ 12/31/2019 ​ 12/31/2019 ​ Technique ​ Inputs ​ 12/31/2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Impaired loans: ​ ​ ​ ​ Residential mortgage loans - first and junior liens ​ $ 732 ​ $ 176 ​ $ 556 Sales comparison Discount to appraised value 30 % Commercial: ​ ​ ​ ​ Commercial and industrial ​ 106 ​ 89 ​ 17 Sales comparison Discount to appraised value 69 % Commercial and industrial ​ 798 ​ 60 ​ 738 Liquidation of accounts receivable Discount to borrower's financial statement value 15 % Commercial construction and land ​ 1,261 ​ 678 ​ 583 Sales comparison Discount to appraised value 47 % Loans secured by farmland ​ 478 ​ 48 ​ 430 Sales comparison Discount to appraised value 46 % Total impaired loans ​ $ 3,375 ​ $ 1,051 ​ $ 2,324 ​ Foreclosed assets held for sale - real estate: ​ ​ ​ ​ Residential (1-4 family) ​ $ 292 ​ $ 0 ​ $ 292 Sales comparison Discount to appraised value 46 % Land ​ 70 ​ 0 ​ 70 Sales comparison Discount to appraised value 53 % Commercial real estate ​ 2,524 ​ 0 ​ 2,524 Sales comparison Discount to appraised value 39 % Total foreclosed assets held for sale ​ $ 2,886 ​ $ 0 ​ $ 2,886 ​ ​

NATURE OF OPERATIONS AND SUMM_3

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
	Dec. 31, 2020USD ($)segment	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Number of reportable segments | segment	1
Credit losses related to unfunded loan commitments	$ 11,385,000	$ 9,836,000	$ 9,309,000
Threshold amount of estimate loss for evaluating individual loans for impairment	100,000
Accrued interest related to unrecognized tax benefits	0
Fair value of trust assets under management	$ 1,103,228,000	1,007,113,000
Trust revenue is earned and collected monthly	83.00%
Commercial
Credit losses related to unfunded loan commitments	$ 6,308,000	4,788,000	4,591,000
Commercial | Maximum
Threshold amount of loan balance for evaluating individual impairment loss	200,000
Residential mortgage
Credit losses related to unfunded loan commitments	4,253,000	4,182,000	3,986,000
Residential mortgage | Maximum
Threshold amount of loan balance for evaluating individual impairment loss	400,000
Consumer
Credit losses related to unfunded loan commitments	239,000	281,000	$ 233,000
Consumer | Maximum
Threshold amount of loan balance for evaluating individual impairment loss	400,000
Unfunded Loan Commitment
Credit losses related to unfunded loan commitments	$ 0	$ 0

BUSINESS COMBINATIONS - Covenan

BUSINESS COMBINATIONS - Covenant Acquisition (Details) - USD ($)	Jul. 01, 2020	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
BUSINESS COMBINATIONS
Goodwill		$ 52,505,000		$ 28,388,000	$ 11,942,000
Covenant Financial Inc.
BUSINESS COMBINATIONS
Total purchase consideration	$ 63,266,000
Cash paid	$ 21,654,000
Consideration in shares of commons stock (in shares)	2,047,819
Common equity issued in business combination	$ 41,612,000
Refinement term of assets and liabilities	1 year
Equity portion of business acquisition consideration issuance costs	$ 183,000
Fair value of assets acquired		608,485,000
Fair value of liabilities assumed		569,336,000
Goodwill	$ 24,117,000	24,117,000	$ 24,138,000
Purchase accounting goodwill adjustments		$ 21,000

BUSINESS COMBINATIONS - Coven_2

BUSINESS COMBINATIONS - Covenant Adjustments to Assets and Liabilities (Details)	3 Months Ended
	Dec. 31, 2020USD ($)
Business Acquisition [Line Items]
Balance, end of period	$ 52,505,000
Covenant Financial Inc.
Business Acquisition [Line Items]
Balance, beginning of period	24,138,000
Write-down purchased credit impaired loan	556,000
Increase deferred tax asset, net	(410,000)
Decrease other liabilities	(167,000)
Balance, end of period	$ 24,117,000

BUSINESS COMBINATIONS - Coven_3

BUSINESS COMBINATIONS - Covenant Financial Consideration (Details) - Covenant Financial Inc.	Jul. 01, 2020USD ($)
Fair value of consideration transferred:
Cash	$ 21,837,000
Common stock issued	41,429,000
Total consideration transferred	$ 63,266,000

BUSINESS COMBINATIONS - Coven_4

BUSINESS COMBINATIONS - Covenant Financial Assets and Liabilities (Details) - USD ($)	Dec. 31, 2020	Sep. 30, 2020	Jul. 01, 2020	Dec. 31, 2019	Dec. 31, 2018
BUSINESS COMBINATIONS
Goodwill	$ 52,505,000			$ 28,388,000	$ 11,942,000
Covenant Financial Inc.
BUSINESS COMBINATIONS
Cash and cash equivalents			$ 97,792,000
Available-for-sale debt securities			10,754,000
Loans receivable			464,236,000
Bank-owned life insurance			11,170,000
Accrued interest receivable			1,922,000
Bank premises and equipment			3,250,000
Foreclosed assets held for sale			860,000
Deferred tax asset, net			1,879,000
Goodwill	$ 24,117,000	$ 24,138,000	24,117,000
Other assets			13,478,000
Deposits			(481,796,000)
Short-term borrowings			(33,950,000)
Long-term borrowings			(30,025,000)
Subordinated debt			(10,091,000)
Accrued interest and other liabilities			(13,474,000)
Estimated excess fair value of assets acquired over liabilities assumed			63,266,000
Federal Home Loan Bank of Pittsburgh stock			2,939,000
Covenant Financial Inc. | Core Deposits
BUSINESS COMBINATIONS
Core deposit intangible			$ 3,144,000

BUSINESS COMBINATIONS - Coven_5

BUSINESS COMBINATIONS - Covenant Financial Loans Acquired (Details) - Covenant Financial Inc.	Jul. 01, 2020USD ($)
BUSINESS COMBINATIONS
Number acquired loans that displayed evidence of credit quality deterioration	24
Loans	$ 464,236,000
Performing
BUSINESS COMBINATIONS
Loans	457,588,000
PCI
BUSINESS COMBINATIONS
Loans	6,648,000
Home Equity Loan [Member]
BUSINESS COMBINATIONS
Loans	8,368,000
Home Equity Loan [Member] | Performing
BUSINESS COMBINATIONS
Loans	8,368,000
Home Equity Loan [Member] | PCI
BUSINESS COMBINATIONS
Loans	0
Construction Loans
BUSINESS COMBINATIONS
Loans	11,437,000
Construction Loans | Performing
BUSINESS COMBINATIONS
Loans	11,437,000
Construction Loans | PCI
BUSINESS COMBINATIONS
Loans	0
Commercial and industrial
BUSINESS COMBINATIONS
Loans	39,874,000
Commercial and industrial | Performing
BUSINESS COMBINATIONS
Loans	39,068,000
Commercial and industrial | PCI
BUSINESS COMBINATIONS
Loans	806,000
Commercial Construction And Land
BUSINESS COMBINATIONS
Loans	63,740,000
Commercial Construction And Land | Performing
BUSINESS COMBINATIONS
Loans	63,740,000
Commercial Construction And Land | PCI
BUSINESS COMBINATIONS
Loans	0
Loans secured by farm land
BUSINESS COMBINATIONS
Loans	73,000
Loans secured by farm land | Performing
BUSINESS COMBINATIONS
Loans	73,000
Loans secured by farm land | PCI
BUSINESS COMBINATIONS
Loans	0
Multi-family (5 or more) residential
BUSINESS COMBINATIONS
Loans	24,680,000
Multi-family (5 or more) residential | Performing
BUSINESS COMBINATIONS
Loans	23,065,000
Multi-family (5 or more) residential | PCI
BUSINESS COMBINATIONS
Loans	1,615,000
Other commercial loans
BUSINESS COMBINATIONS
Loans	952,000
Other commercial loans | Performing
BUSINESS COMBINATIONS
Loans	952,000
Other commercial loans | PCI
BUSINESS COMBINATIONS
Loans	0
Residential mortgage
BUSINESS COMBINATIONS
Loans	89,904,000
Residential mortgage | Performing
BUSINESS COMBINATIONS
Loans	89,829,000
Residential mortgage | PCI
BUSINESS COMBINATIONS
Loans	75,000
Residential mortgage | Real estate loan | first liens
BUSINESS COMBINATIONS
Loans	65,883,000
Residential mortgage | Real estate loan | first liens | Performing
BUSINESS COMBINATIONS
Loans	65,883,000
Residential mortgage | Real estate loan | first liens | PCI
BUSINESS COMBINATIONS
Loans	0
Residential mortgage | Real estate loan | junior liens
BUSINESS COMBINATIONS
Loans	4,216,000
Residential mortgage | Real estate loan | junior liens | Performing
BUSINESS COMBINATIONS
Loans	4,141,000
Residential mortgage | Real estate loan | junior liens | PCI
BUSINESS COMBINATIONS
Loans	75,000
Commercial
BUSINESS COMBINATIONS
Loans	373,953,000
Commercial | Performing
BUSINESS COMBINATIONS
Loans	367,380,000
Commercial | PCI
BUSINESS COMBINATIONS
Loans	6,573,000
Commercial | Loans secured by Real Estate
BUSINESS COMBINATIONS
Loans	244,634,000
Commercial | Loans secured by Real Estate | Performing
BUSINESS COMBINATIONS
Loans	240,482,000
Commercial | Loans secured by Real Estate | PCI
BUSINESS COMBINATIONS
Loans	4,152,000
Consumer
BUSINESS COMBINATIONS
Loans	379,000
Consumer | Performing
BUSINESS COMBINATIONS
Loans	379,000
Consumer | PCI
BUSINESS COMBINATIONS
Loans	$ 0

BUSINESS COMBINATIONS - Coven_6

BUSINESS COMBINATIONS - Covenant Financial Loans Fair Value Adjustments (Details) - Covenant Financial Inc. $ in Thousands	Jul. 01, 2020USD ($)
BUSINESS COMBINATIONS
Gross amortized cost at acquisition	$ 472,012
Fair value adjustments:
Market rates	2,909
Credit adjustment on non-impaired loans	(7,219)
Credit adjustment on impaired loans	(3,466)
Fair value at acquisition	$ 464,236

BUSINESS COMBINATIONS - Coven_7

BUSINESS COMBINATIONS - Covenant Financial Other Information (Details) - Covenant Financial Inc. - USD ($)	Jul. 01, 2020	Dec. 31, 2020	Dec. 31, 2019
BUSINESS COMBINATIONS
Number issues of subordinated debt	2
Merger related expenses		$ 7,708,000	$ 287,000
Subordinated debt, maturity June 2026, interest at 6.25%
BUSINESS COMBINATIONS
Debt par value	$ 8,000,000
Stated interest rate	6.25%
Subordinated debt, maturity July 2027, interest 6.50%
BUSINESS COMBINATIONS
Debt par value	$ 2,000,000
Stated interest rate	6.50%
Core Deposits
BUSINESS COMBINATIONS
Core deposit intangible	$ 3,144,000
Weighted-average life	5 years 4 months 24 days

BUSINESS COMBINATIONS - Coven_8

BUSINESS COMBINATIONS - Covenant Financial Pro Forma (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Covenant Financial Inc.
BUSINESS COMBINATIONS
Merger-related expenses, including Covenant's expense	$ 1,353,000
Merger-related expenses, net of tax	1,111,000
Tax benefits excluded from pro-forma realized from stock-based compensation vested	600,000
Covenant Financial Inc.
BUSINESS COMBINATIONS
Merger-related expenses, including Covenant's expense	9,061,000
Merger related expenses	7,708,000	$ 287,000
Merger-related expenses, including Covenant's expense, net of tax	7,245,000
Interest income	88,379,000	88,830,000
Interest expense	13,407,000	15,156,000
Net interest income	74,972,000	73,674,000
Provision for loan losses	4,013,000	1,309,000
Net interest income after provision for loan losses	70,959,000	72,365,000
Noninterest income.	24,657,000	20,550,000
Net gains on securities	169,000	23,000
Loss on prepayment of borrowings	1,636,000	0
Other noninterest expenses	60,094,000	62,377,000
Income before income tax provision	34,055,000	30,561,000
Income tax provision	6,227,000	5,311,000
Net income	$ 27,828,000	$ 25,250,000
Earnings per common share - basic (in dollars per share)	$ 1.75	$ 1.64
Earnings per common share - diluted (in dollars per share)	$ 1.75	$ 1.63

BUSINESS COMBINATIONS - Monumen

BUSINESS COMBINATIONS - Monument Bancorp (Details)	Apr. 01, 2019USD ($)Officeshares	Dec. 31, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
BUSINESS COMBINATIONS
Goodwill		$ 52,505,000				$ 28,388,000				$ 52,505,000	$ 28,388,000	$ 11,942,000
Loss on prepayment of borrowings		1,636,000	$ 0	$ 0	$ 0
Net gains on available-for-sale debt securities		144,000	25,000	0	0	3,000	$ 13,000	$ 7,000	$ 0	169,000	23,000
Merger-related expenses		$ 182,000	$ 6,402,000	$ 983,000	$ 141,000	$ 281,000	$ 206,000	$ 3,301,000	$ 311,000	$ 7,708,000	4,099,000
Monument Bancorp, Inc
BUSINESS COMBINATIONS
Common stock acquired (as a percent)	100.00%
Number of bank offices | Office	2
Number of lending office | Office	1
Total purchase consideration	$ 42,700,000
Cash paid	$ 9,600,000
Consideration in shares of commons stock (in shares) | shares	1,279,825
Common equity issued in business combination	$ 33,100,000
Equity portion of business acquisition consideration issuance costs	181,000
Goodwill	16,400,000
Core deposit intangible asset	1,500,000
Loans	259,300,000
Deposits	223,300,000
Borrowings	111,600,000
Subordinated debt	12,400,000
Available-for-sale debt securities	94,600,000
Net gains on available-for-sale debt securities	$ 0
Refinement term of assets and liabilities	1 year
Merger-related expenses											$ 3,812,000
Monument Bancorp, Inc | Subordinated debt, Redeemed April 1, 2019
BUSINESS COMBINATIONS
Subordinated debt	$ 5,400,000
Loss on prepayment of borrowings	$ 0

PER SHARE DATA (Details)

PER SHARE DATA (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Basic
Net income	$ 6,770	$ 2,848	$ 5,438	$ 4,166	$ 5,458	$ 5,307	$ 3,649	$ 5,090	$ 19,222	$ 19,504
Less: Dividends and undistributed earnings allocated to participating securities									(116)	(100)
Net income attributable to common shares	$ 6,727	$ 2,830	$ 5,405	$ 4,146	$ 5,431	$ 5,281	$ 3,630	$ 5,063	$ 19,106	$ 19,404
Basic weighted-average common shares outstanding (in shares)									14,743,386	13,298,736
Basic earnings per common share (in dollars per share)	$ 0.43	$ 0.18	$ 0.39	$ 0.30	$ 0.40	$ 0.39	$ 0.27	$ 0.41	$ 1.30	$ 1.46
Diluted
Net income attributable to common shares									$ 19,106	$ 19,404
Basic weighted-average common shares outstanding (in shares)									14,743,386	13,298,736
Dilutive effect of potential common stock arising from stock options (in shares)									3,662	22,823
Diluted weighted-average common shares outstanding (in shares)									14,747,048	13,321,559
Diluted earnings per common share (in dollars per share)	$ 0.43	$ 0.18	$ 0.39	$ 0.30	$ 0.40	$ 0.39	$ 0.27	$ 0.41	$ 1.30	$ 1.46
Weighted-average nonvested restricted shares outstanding (in shares)									89,718	68,358
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)									32,538	0

COMPREHENSIVE INCOME - Componen

COMPREHENSIVE INCOME - Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
COMPREHENSIVE INCOME
Unrealized holding gains on available-for-sale debt securities	$ 10,504	$ 9,920
Unrealized holding gains on available-for-sale debt securities, Income Tax Effect	(2,205)	(2,084)
Unrealized holding gains on available-for-sale debt securities, Net of Tax Amount	8,299	7,836
Reclassification adjustment for gains realized in income, Before-Tax Amount	(169)	(23)
Reclassification adjustment for (gains) realized in income, Income Tax Effect	35	5
Reclassification adjustment for (gains) realized in income. Net of Tax Amount	(134)	18
Unrealized holding gains on available-for-sale debt securities, Before-Tax Amount	10,335	9,897
Other comprehensive income on available-for-sale debt securities, income tax effect	(2,170)	(2,079)
Unrealized holding gains on available-for-sale debt securities, Net-of-Tax Amount	8,165	7,818
Changes from plan amendments and actuarial gains and losses, Before-Tax Amount	(49)	87
Changes from plan amendments and actuarial gains and losses, Income Tax Effect	11	(19)
Changes from plan amendments and actuarial gains and losses, Net-of-Tax Amount	(38)	68
Amortization of prior service cost and net actuarial gain included in net periodic benefit cost, Before-Tax Amount	(29)	(32)
Amortization of prior service cost and net actuarial gain included in net periodic benefit cost, Income Tax Effect	6	7
Amortization of prior service cost and net actuarial gain included in net periodic benefit cost, Net-of-Tax Amount	(23)	(25)
Other comprehensive (loss) income on unfunded retirement obligations	(78)	55
Other comprehensive income (loss) on unfunded retirement obligations, Income Tax Effect	17	(12)
Other comprehensive income (loss) on unfunded retirement obligations, Net-of-Tax Amount	(61)	43
Other comprehensive income before income tax	10,257	9,952
Total other comprehensive income (loss), Income Tax Effect	(2,153)	(2,091)
Total other comprehensive income	$ 8,104	$ 7,861

COMPREHENSIVE INCOME - Changes

COMPREHENSIVE INCOME - Changes of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 244,452	$ 197,368
Other comprehensive income (loss) during year	8,104	7,861
Balance	299,756	244,452
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
Balance	3,511	(4,307)
Other comprehensive income (loss) during year	8,165	7,818
Balance	11,676	3,511
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Balance	180	137
Other comprehensive income (loss) during year	(61)	43
Balance	119	180
Accumulated Other Comprehensive (Loss) Income
Balance	3,691	(4,170)
Other comprehensive income (loss) during year	8,104	7,861
Balance	$ 11,795	$ 3,691

CASH AND DUE FROM BANKS (Detail

CASH AND DUE FROM BANKS (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
CASH AND DUE FROM BANKS
Cash and cash equivalents	$ 96,017,000	$ 31,122,000
Certificates of deposit	5,840,000	4,080,000
Total cash and due from banks	101,857,000	35,202,000
Cash Reserve Deposit Required and Made	$ 0	$ 20,148,000

SECURITIES - Available-for-sale

SECURITIES - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale Securities
Available-for-sale securities, amortized cost	$ 334,552	$ 342,278
Available-for-sale securities, gross unrealized holding gains	14,849	5,407
Available-for-sale securities, gross unrealized holding losses	(69)	(962)
Total, fair value	349,332	346,723
Obligations of the U.S. Treasury
Available-for-sale Securities
Available-for-sale securities, amortized cost	12,184
Available-for-sale securities, gross unrealized holding gains	0
Available-for-sale securities, gross unrealized holding losses	(2)
Total, fair value	12,182
Obligations of U.S. Government agencies
Available-for-sale Securities
Available-for-sale securities, amortized cost	25,349	16,380
Available-for-sale securities, gross unrealized holding gains	1,003	620
Available-for-sale securities, gross unrealized holding losses	(8)	0
Total, fair value	26,344	17,000
Obligations Of States And Political Subdivisions Tax Exempt
Available-for-sale Securities
Available-for-sale securities, amortized cost	116,427	68,787
Available-for-sale securities, gross unrealized holding gains	6,000	2,011
Available-for-sale securities, gross unrealized holding losses	(26)	(38)
Total, fair value	122,401	70,760
Obligations Of States And Political Subdivisions Taxable
Available-for-sale Securities
Available-for-sale securities, amortized cost	45,230	35,446
Available-for-sale securities, gross unrealized holding gains	2,246	927
Available-for-sale securities, gross unrealized holding losses	(24)	(70)
Total, fair value	47,452	36,303
Residential Passthrough Securities
Available-for-sale Securities
Available-for-sale securities, amortized cost	36,853	58,875
Available-for-sale securities, gross unrealized holding gains	1,323	472
Available-for-sale securities, gross unrealized holding losses	0	(137)
Total, fair value	38,176	59,210
Residential Collateralized Mortgage Obligations
Available-for-sale Securities
Available-for-sale securities, amortized cost	56,048	115,025
Available-for-sale securities, gross unrealized holding gains	1,428	308
Available-for-sale securities, gross unrealized holding losses	(9)	(610)
Total, fair value	57,467	114,723
Commercial Mortgage Backed Securities
Available-for-sale Securities
Available-for-sale securities, amortized cost	42,461	47,765
Available-for-sale securities, gross unrealized holding gains	2,849	1,069
Available-for-sale securities, gross unrealized holding losses	0	(107)
Total, fair value	$ 45,310	$ 48,727

SECURITIES - Available-for-sa_2

SECURITIES - Available-for-sale Securities With Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	$ 26,058	$ 53,233
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(69)	(336)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0	53,990
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0	(626)
Available-for-sale securities with unrealized loss positions, fair value	26,058	107,223
Available-for-sale securities, with unrealized loss positions, unrealized losses	(69)	(962)
Obligations of the U.S. Treasury
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	9,159
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(2)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0
Available-for-sale securities with unrealized loss positions, fair value	9,159
Available-for-sale securities, with unrealized loss positions, unrealized losses	(2)
Obligations of U.S. Government agencies
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	4,992
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(8)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0
Available-for-sale securities with unrealized loss positions, fair value	4,992
Available-for-sale securities, with unrealized loss positions, unrealized losses	(8)
Obligations Of States And Political Subdivisions Tax Exempt
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	3,811	6,429
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(26)	(38)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0	0
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0	0
Available-for-sale securities with unrealized loss positions, fair value	3,811	6,429
Available-for-sale securities, with unrealized loss positions, unrealized losses	(26)	(38)
Obligations Of States And Political Subdivisions Taxable
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	5,235	5,624
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(24)	(68)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0	161
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0	(2)
Available-for-sale securities with unrealized loss positions, fair value	5,235	5,785
Available-for-sale securities, with unrealized loss positions, unrealized losses	(24)	(70)
Residential Passthrough Securities
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value		9,771
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses		(35)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value		14,787
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses		(102)
Available-for-sale securities with unrealized loss positions, fair value		24,558
Available-for-sale securities, with unrealized loss positions, unrealized losses		(137)
Residential Collateralized Mortgage Obligations
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value	2,861	31,409
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses	(9)	(195)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value	0	30,535
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses	0	(415)
Available-for-sale securities with unrealized loss positions, fair value	2,861	61,944
Available-for-sale securities, with unrealized loss positions, unrealized losses	$ (9)	(610)
Commercial Mortgage Backed Securities
Available-for-sale Securities With Unrealized Loss Positions
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value		0
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses		0
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value		8,507
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses		(107)
Available-for-sale securities with unrealized loss positions, fair value		8,507
Available-for-sale securities, with unrealized loss positions, unrealized losses		$ (107)

SECURITIES - Gross Realized Gai

SECURITIES - Gross Realized Gains and Losses From Available-for-sale Debt Securities (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
SECURITIES
Gross realized gains from sales									$ 222	$ 24
Gross realized losses from sales									(53)	(1)
Net realized gains	$ 144	$ 25	$ 0	$ 0	$ 3	$ 13	$ 7	$ 0	169	23
Income tax provision related to net realized gains									$ 35	$ 5

SECURITIES - Available-for-sa_3

SECURITIES - Available-for-sale Debt Securities by Contractual Maturity (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale Securities
Due in one year or less, amortized cost	$ 13,409,000
Due in one year or less, fair value	13,506,000
Due from one year through five years. amortized cost	46,172,000
Due from one year through five years, fair value	47,758,000
Due from five years through ten years, amortized cost	47,535,000
Due from five years through ten years, fair value	50,110,000
Due after ten years, amortized cost	92,074,000
Due after ten years, fair value	97,005,000
Sub-total, amortized cost	199,190,000
Sub-total, fair value	208,379,000
Total, amortized cost	334,552,000	$ 342,278,000
Total, fair value	349,332,000	346,723,000
Investment Securities [Member]
Available-for-sale Securities
Investment pledged as collateral	247,373,000	215,270,000
Residential Passthrough Securities
Available-for-sale Securities
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost	36,853,000
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value	38,176,000
Total, amortized cost	36,853,000	58,875,000
Total, fair value	38,176,000	59,210,000
Residential Collateralized Mortgage Obligations
Available-for-sale Securities
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost	56,048,000
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value	57,467,000
Total, amortized cost	56,048,000	115,025,000
Total, fair value	57,467,000	$ 114,723,000
Commercial mortgage-backed securities
Available-for-sale Securities
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost	42,461,000
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value	$ 45,310,000

SECURITIES - Equity Securities

SECURITIES - Equity Securities (Details)	12 Months Ended
	Dec. 31, 2020USD ($)security	Dec. 31, 2019USD ($)security
Equity Securities
Marketable equity security	$ 1,000,000	$ 979,000
Number of equity securities sold | security	0	0
Mutual Fund
Equity Securities
Number of mutual funds	1
Unrealized gain/loss on the mutual fund	$ 0	$ 21,000
Unrealized gains (losses) recognized during the period on equity securities still held at the reporting date	(21,000)	(29,000)
Other Assets | Federal Home Loan Bank of Pittsburgh
Equity Securities
Federal Home Loan Bank Stock	$ 9,720,000	$ 10,131,000

LOANS (Details)

LOANS (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
LOANS
Loans receivable	$ 1,644,209	$ 1,182,222
Allowance for loan losses	(11,385)	(9,836)	$ (9,309)
Loans, net	1,632,824	1,172,386
Residential mortgage
LOANS
Loans receivable	620,172	586,580
Allowance for loan losses	(4,253)	(4,182)	(3,986)
Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable	532,947	510,641
Allowance for loan losses	(3,524)	(3,405)	(3,156)
Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable	27,311	27,503
Allowance for loan losses	(349)	(384)	(325)
Residential mortgage | Home equity lines of credit
LOANS
Loans receivable	39,301	33,638
Allowance for loan losses	(281)	(276)	(302)
Residential mortgage | Construction Loans
LOANS
Loans receivable	20,613	14,798
Allowance for loan losses	(99)	(117)	(203)
Commercial
LOANS
Loans receivable	1,007,751	578,901
Allowance for loan losses	(6,308)	(4,788)	(4,591)
Commercial | Real estate loan
LOANS
Loans receivable	531,810	301,227
Allowance for loan losses	(3,051)	(1,921)	(2,538)
Commercial | Construction Loans
LOANS
Loans receivable	42,874	33,555
Allowance for loan losses	(454)	(966)	(110)
Commercial | Commercial and industrial
LOANS
Loans receivable	159,577	126,374
Allowance for loan losses	(2,245)	(1,391)	(1,553)
Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable	132,269	0
Allowance for loan losses	0
Commercial | Political subdivisions
LOANS
Loans receivable	53,221	53,570
Allowance for loan losses	0	0
Commercial | Commercial Construction And Land
LOANS
Loans receivable	42,874
Allowance for loan losses	(454)
Commercial | Loans secured by farm land
LOANS
Loans receivable	11,736	12,251
Allowance for loan losses	(120)	(158)	(102)
Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable	55,811	31,070
Allowance for loan losses	(236)	(156)	(114)
Commercial | Agricultural loans
LOANS
Loans receivable	3,164	4,319
Allowance for loan losses	(34)	(41)	(46)
Commercial | Other commercial loans
LOANS
Loans receivable	17,289	16,535
Allowance for loan losses	(168)	(155)	(128)
Consumer
LOANS
Loans receivable	16,286	16,741
Allowance for loan losses	$ (239)	$ (281)	$ (233)

LOANS - Loans Modified Under Co

LOANS - Loans Modified Under Covid-19 Program (Details) $ in Thousands	Dec. 31, 2020USD ($)loan
LOANS
Loans Modified, Number of Loans | loan	45
Loans Modified, Recorded Investment | $	$ 37,397
Residential mortgage
LOANS
Loans Modified, Number of Loans | loan	15
Loans Modified, Recorded Investment | $	$ 2,334
Consumer
LOANS
Loans Modified, Number of Loans | loan	3
Loans Modified, Recorded Investment | $	$ 61
Commercial
LOANS
Loans Modified, Number of Loans | loan	27
Loans Modified, Recorded Investment | $	$ 35,002

LOANS - Adjustments to Initial

LOANS - Adjustments to Initial Discounts and Carrying Amounts of Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Market Rate Adjustment
LOANS
Adjustments to gross amortized cost of loans, Beginning balance	$ (1,415)	$ 0
Adjustment recorded in acquisition	2,909	(1,807)
Accretion recognized in interest income	(776)	392
Adjustments to gross amortized cost of loans, Ending balance	718	(1,415)
Credit Adjustment on Non-impaired Loans
LOANS
Adjustments to gross amortized cost of loans, Beginning balance	(1,216)	0
Adjustment recorded in acquisition	(7,219)	(1,914)
Accretion recognized in interest income	2,456	698
Adjustments to gross amortized cost of loans, Ending balance	$ (5,979)	$ (1,216)

LOANS - Components of Purchase

LOANS - Components of Purchase Account Adjustments on PCI Loans acquired (Details) - Credit Adjustment on PCI Loans $ in Thousands	Jul. 01, 2020USD ($)
Financing Receivable, Allowance for Credit Losses
Contractually required principal at acquisition	$ 10,114
Non-accretable discount	(3,466)
Expected cash flows	$ 6,648

LOANS - Summary of PCI Loans He

LOANS - Summary of PCI Loans Held (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
LOANS
Outstanding balance	$ 10,316	$ 759
Carrying amount	$ 6,841	$ 441

LOANS - Allowance for Loan Loss

LOANS - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
LOANS
Allowance for Loan losses				$ 9,836				$ 9,309	$ 9,836	$ 9,309
Allowance for Loan losses, Charge-offs									(2,465)	(379)
Allowance for Loan losses, Recoveries									101	57
Allowance for Loan losses, Provision (Credit)	$ 620	$ 1,941	$ (176)	1,528	$ 652	$ 1,158	$ (4)	(957)	3,913	849
Allowance for Loan losses	11,385				9,836				11,385	9,836
Residential mortgage
LOANS
Allowance for Loan losses				4,182				3,986	4,182	3,986
Allowance for Loan losses, Charge-offs									0	(190)
Allowance for Loan losses, Recoveries									44	12
Allowance for Loan losses, Provision (Credit)									27	374
Allowance for Loan losses	4,253				4,182				4,253	4,182
Residential mortgage | Real estate loan | first liens
LOANS
Allowance for Loan losses				3,405				3,156	3,405	3,156
Allowance for Loan losses, Charge-offs									0	(166)
Allowance for Loan losses, Recoveries									39	4
Allowance for Loan losses, Provision (Credit)									80	411
Allowance for Loan losses	3,524				3,405				3,524	3,405
Residential mortgage | Real estate loan | junior liens
LOANS
Allowance for Loan losses				384				325	384	325
Allowance for Loan losses, Charge-offs									0	(24)
Allowance for Loan losses, Recoveries									1	2
Allowance for Loan losses, Provision (Credit)									(36)	81
Allowance for Loan losses	349				384				349	384
Residential mortgage | Home equity lines of credit
LOANS
Allowance for Loan losses				276				302	276	302
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									4	5
Allowance for Loan losses, Provision (Credit)									1	(31)
Allowance for Loan losses	281				276				281	276
Residential mortgage | Construction Loans
LOANS
Allowance for Loan losses				117				203	117	203
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	1
Allowance for Loan losses, Provision (Credit)									(18)	(87)
Allowance for Loan losses	99				117				99	117
Commercial
LOANS
Allowance for Loan losses				4,788				4,591	4,788	4,591
Allowance for Loan losses, Charge-offs									(2,343)	(6)
Allowance for Loan losses, Recoveries									16	6
Allowance for Loan losses, Provision (Credit)									3,847	197
Allowance for Loan losses	6,308				4,788				6,308	4,788
Commercial | Real estate loan
LOANS
Allowance for Loan losses				1,921				2,538	1,921	2,538
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									1,130	(617)
Allowance for Loan losses	3,051				1,921				3,051	1,921
Commercial | Construction Loans
LOANS
Allowance for Loan losses				966				110	966	110
Allowance for Loan losses, Charge-offs									(107)	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									(405)	856
Allowance for Loan losses	454				966				454	966
Commercial | Commercial and industrial
LOANS
Allowance for Loan losses				1,391				1,553	1,391	1,553
Allowance for Loan losses, Charge-offs									(2,236)	(6)
Allowance for Loan losses, Recoveries									16	6
Allowance for Loan losses, Provision (Credit)									3,074	(162)
Allowance for Loan losses	2,245				1,391				2,245	1,391
Commercial | Commercial Construction And Land
LOANS
Allowance for Loan losses	454								454
Commercial | Loans secured by farm land
LOANS
Allowance for Loan losses				158				102	158	102
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									(38)	56
Allowance for Loan losses	120				158				120	158
Commercial | Multi-family (5 or more) residential
LOANS
Allowance for Loan losses				156				114	156	114
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									80	42
Allowance for Loan losses	236				156				236	156
Commercial | Agricultural loans
LOANS
Allowance for Loan losses				41				46	41	46
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									(7)	(5)
Allowance for Loan losses	34				41				34	41
Commercial | Other commercial loans
LOANS
Allowance for Loan losses				155				128	155	128
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									13	27
Allowance for Loan losses	168				155				168	155
Consumer
LOANS
Allowance for Loan losses				281				233	281	233
Allowance for Loan losses, Charge-offs									(122)	(183)
Allowance for Loan losses, Recoveries									41	39
Allowance for Loan losses, Provision (Credit)									39	192
Allowance for Loan losses	239				281				239	281
Unallocated
LOANS
Allowance for Loan losses				$ 585				$ 499	585	499
Allowance for Loan losses, Charge-offs									0	0
Allowance for Loan losses, Recoveries									0	0
Allowance for Loan losses, Provision (Credit)									0	86
Allowance for Loan losses	$ 585				$ 585				$ 585	$ 585

LOANS - Outstanding Loans by Ri

LOANS - Outstanding Loans by Risk Rating (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
LOANS
Loans receivable	$ 1,644,209	$ 1,182,222
Purchased Credit Impaired
LOANS
Loans receivable	6,841	441
Residential mortgage
LOANS
Loans receivable	620,172	586,580
Residential mortgage | Purchased Credit Impaired
LOANS
Loans receivable	145	77
Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable	532,947	510,641
Residential mortgage | Real estate loan | first liens | Purchased Credit Impaired
LOANS
Loans receivable	76	77
Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable	27,311	27,503
Residential mortgage | Real estate loan | junior liens | Purchased Credit Impaired
LOANS
Loans receivable	69	0
Residential mortgage | Home equity lines of credit
LOANS
Loans receivable	39,301	33,638
Residential mortgage | Home equity lines of credit | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Residential mortgage | Construction Loans
LOANS
Loans receivable	20,613	14,798
Residential mortgage | Construction Loans | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Commercial
LOANS
Loans receivable	1,007,751	578,901
Commercial | Purchased Credit Impaired
LOANS
Loans receivable	6,696	364
Commercial | Real estate loan
LOANS
Loans receivable	531,810	301,227
Commercial | Real estate loan | Purchased Credit Impaired
LOANS
Loans receivable	4,298	364
Commercial | Construction Loans
LOANS
Loans receivable	42,874	33,555
Commercial | Construction Loans | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Commercial | Commercial and industrial
LOANS
Loans receivable	159,577	126,374
Commercial | Commercial and industrial | Purchased Credit Impaired
LOANS
Loans receivable	784	0
Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable	132,269	0
Commercial | Small Business Administration - Paycheck Protection Program | Purchased Credit Impaired
LOANS
Loans receivable	0
Commercial | Political subdivisions
LOANS
Loans receivable	53,221	53,570
Commercial | Political subdivisions | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Commercial | Commercial Construction And Land
LOANS
Loans receivable	42,874
Commercial | Loans secured by farm land
LOANS
Loans receivable	11,736	12,251
Commercial | Loans secured by farm land | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable	55,811	31,070
Commercial | Multi-family (5 or more) residential | Purchased Credit Impaired
LOANS
Loans receivable	1,614	0
Commercial | Agricultural loans
LOANS
Loans receivable	3,164	4,319
Commercial | Agricultural loans | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Commercial | Other commercial loans
LOANS
Loans receivable	17,289	16,535
Commercial | Other commercial loans | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Consumer
LOANS
Loans receivable	16,286	16,741
Consumer | Purchased Credit Impaired
LOANS
Loans receivable	0	0
Pass
LOANS
Loans receivable	1,565,349	1,143,535
Pass | Residential mortgage
LOANS
Loans receivable	602,307	575,884
Pass | Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable	516,685	500,963
Pass | Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable	26,480	26,953
Pass | Residential mortgage | Home equity lines of credit
LOANS
Loans receivable	38,529	33,170
Pass | Residential mortgage | Construction Loans
LOANS
Loans receivable	20,613	14,798
Pass | Commercial
LOANS
Loans receivable	946,870	550,931
Pass | Commercial | Real estate loan
LOANS
Loans receivable	494,876	294,397
Pass | Commercial | Construction Loans
LOANS
Loans receivable	42,110	32,224
Pass | Commercial | Commercial and industrial
LOANS
Loans receivable	143,500	114,293
Pass | Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable	132,269
Pass | Commercial | Political subdivisions
LOANS
Loans receivable	53,221	53,570
Pass | Commercial | Loans secured by farm land
LOANS
Loans receivable	10,473	6,528
Pass | Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable	50,563	30,160
Pass | Commercial | Agricultural loans
LOANS
Loans receivable	2,569	3,343
Pass | Commercial | Other commercial loans
LOANS
Loans receivable	17,289	16,416
Pass | Consumer
LOANS
Loans receivable	16,172	16,720
Special Mention
LOANS
Loans receivable	35,316	19,658
Special Mention | Residential mortgage
LOANS
Loans receivable	6,392	331
Special Mention | Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable	6,192	193
Special Mention | Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable	141	79
Special Mention | Residential mortgage | Home equity lines of credit
LOANS
Loans receivable	59	59
Special Mention | Residential mortgage | Construction Loans
LOANS
Loans receivable	0	0
Special Mention | Commercial
LOANS
Loans receivable	28,924	19,327
Special Mention | Commercial | Real estate loan
LOANS
Loans receivable	17,374	4,773
Special Mention | Commercial | Construction Loans
LOANS
Loans receivable	715	0
Special Mention | Commercial | Commercial and industrial
LOANS
Loans receivable	8,025	9,538
Special Mention | Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable	0
Special Mention | Commercial | Political subdivisions
LOANS
Loans receivable	0	0
Special Mention | Commercial | Loans secured by farm land
LOANS
Loans receivable	405	4,681
Special Mention | Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable	2,405	0
Special Mention | Commercial | Agricultural loans
LOANS
Loans receivable	0	335
Special Mention | Commercial | Other commercial loans
LOANS
Loans receivable	0	0
Special Mention | Consumer
LOANS
Loans receivable	0	0
Substandard
LOANS
Loans receivable	36,703	18,504
Substandard | Residential mortgage
LOANS
Loans receivable	11,328	10,204
Substandard | Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable	9,994	9,324
Substandard | Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable	621	471
Substandard | Residential mortgage | Home equity lines of credit
LOANS
Loans receivable	713	409
Substandard | Residential mortgage | Construction Loans
LOANS
Loans receivable	0	0
Substandard | Commercial
LOANS
Loans receivable	25,261	8,279
Substandard | Commercial | Real estate loan
LOANS
Loans receivable	15,262	1,693
Substandard | Commercial | Construction Loans
LOANS
Loans receivable	49	1,331
Substandard | Commercial | Commercial and industrial
LOANS
Loans receivable	7,268	2,543
Substandard | Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable	0
Substandard | Commercial | Political subdivisions
LOANS
Loans receivable	0	0
Substandard | Commercial | Loans secured by farm land
LOANS
Loans receivable	858	1,042
Substandard | Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable	1,229	910
Substandard | Commercial | Agricultural loans
LOANS
Loans receivable	595	641
Substandard | Commercial | Other commercial loans
LOANS
Loans receivable	0	119
Substandard | Consumer
LOANS
Loans receivable	114	21
Doubtful
LOANS
Loans receivable	0	84
Doubtful | Residential mortgage
LOANS
Loans receivable	0	84
Doubtful | Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable	0	84
Doubtful | Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable	0	0
Doubtful | Residential mortgage | Home equity lines of credit
LOANS
Loans receivable	0	0
Doubtful | Residential mortgage | Construction Loans
LOANS
Loans receivable	0	0
Doubtful | Commercial
LOANS
Loans receivable	0	0
Doubtful | Commercial | Real estate loan
LOANS
Loans receivable	0	0
Doubtful | Commercial | Construction Loans
LOANS
Loans receivable	0	0
Doubtful | Commercial | Commercial and industrial
LOANS
Loans receivable	0	0
Doubtful | Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable	0
Doubtful | Commercial | Political subdivisions
LOANS
Loans receivable	0	0
Doubtful | Commercial | Loans secured by farm land
LOANS
Loans receivable	0	0
Doubtful | Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable	0	0
Doubtful | Commercial | Agricultural loans
LOANS
Loans receivable	0	0
Doubtful | Commercial | Other commercial loans
LOANS
Loans receivable	0	0
Doubtful | Consumer
LOANS
Loans receivable	$ 0	$ 0

LOANS - Loan Balances and Allow

LOANS - Loan Balances and Allowance for Loan Losses for Each Impairment Method (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
LOANS
Loans receivable: Individually Evaluated	$ 17,818	$ 5,486
Loans receivable: Collectively Evaluated	1,626,391	1,176,736
Loans receivable	1,644,209	1,182,222
Allowance for loan losses: individually evaluated	925	1,051
Allowance for loan losses: collectively evaluated	9,875	8,200
Allowance for loan losses	11,385	9,836	$ 9,309
Residential mortgage
LOANS
Loans receivable: Individually Evaluated	2,799	1,391
Loans receivable: Collectively Evaluated	617,373	585,189
Loans receivable	620,172	586,580
Allowance for loan losses: individually evaluated	162	176
Allowance for loan losses: collectively evaluated	4,091	4,006
Allowance for loan losses	4,253	4,182	3,986
Residential mortgage | Real estate loan | first liens
LOANS
Loans receivable: Individually Evaluated	2,385	1,023
Loans receivable: Collectively Evaluated	530,562	509,618
Loans receivable	532,947	510,641
Allowance for loan losses: individually evaluated	9	0
Allowance for loan losses: collectively evaluated	3,515	3,405
Allowance for loan losses	3,524	3,405	3,156
Residential mortgage | Real estate loan | junior liens
LOANS
Loans receivable: Individually Evaluated	414	368
Loans receivable: Collectively Evaluated	26,897	27,135
Loans receivable	27,311	27,503
Allowance for loan losses: individually evaluated	153	176
Allowance for loan losses: collectively evaluated	196	208
Allowance for loan losses	349	384	325
Residential mortgage | Home equity lines of credit
LOANS
Loans receivable: Individually Evaluated	0	0
Loans receivable: Collectively Evaluated	39,301	33,638
Loans receivable	39,301	33,638
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	281	276
Allowance for loan losses	281	276	302
Residential mortgage | Construction Loans
LOANS
Loans receivable: Individually Evaluated	0	0
Loans receivable: Collectively Evaluated	20,613	14,798
Loans receivable	20,613	14,798
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	99	117
Allowance for loan losses	99	117	203
Commercial
LOANS
Loans receivable: Individually Evaluated	15,019	4,095
Loans receivable: Collectively Evaluated	992,732	574,806
Loans receivable	1,007,751	578,901
Allowance for loan losses: individually evaluated	763	875
Allowance for loan losses: collectively evaluated	5,545	3,913
Allowance for loan losses	6,308	4,788	4,591
Commercial | Real estate loan
LOANS
Loans receivable: Individually Evaluated	11,962	684
Loans receivable: Collectively Evaluated	519,848	300,543
Loans receivable	531,810	301,227
Allowance for loan losses: individually evaluated	692	0
Allowance for loan losses: collectively evaluated	2,359	1,921
Allowance for loan losses	3,051	1,921	2,538
Commercial | Construction Loans
LOANS
Loans receivable: Individually Evaluated		1,261
Loans receivable: Collectively Evaluated		32,294
Loans receivable	42,874	33,555
Allowance for loan losses: individually evaluated		678
Allowance for loan losses: collectively evaluated		288
Allowance for loan losses	454	966	110
Commercial | Commercial and industrial
LOANS
Loans receivable: Individually Evaluated	1,359	1,467
Loans receivable: Collectively Evaluated	158,218	124,907
Loans receivable	159,577	126,374
Allowance for loan losses: individually evaluated	71	149
Allowance for loan losses: collectively evaluated	2,174	1,242
Allowance for loan losses	2,245	1,391	1,553
Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans receivable: Individually Evaluated	0
Loans receivable: Collectively Evaluated	132,269
Loans receivable	132,269	0
Allowance for loan losses: individually evaluated	0
Allowance for loan losses: collectively evaluated	0
Allowance for loan losses	0
Commercial | Political subdivisions
LOANS
Loans receivable: Individually Evaluated	0	0
Loans receivable: Collectively Evaluated	53,221	53,570
Loans receivable	53,221	53,570
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	0	0
Allowance for loan losses	0	0
Commercial | Commercial Construction And Land
LOANS
Loans receivable: Individually Evaluated	0
Loans receivable: Collectively Evaluated	42,874
Loans receivable	42,874
Allowance for loan losses: individually evaluated	0
Allowance for loan losses: collectively evaluated	454
Allowance for loan losses	454
Commercial | Loans secured by farm land
LOANS
Loans receivable: Individually Evaluated	84	607
Loans receivable: Collectively Evaluated	11,652	11,644
Loans receivable	11,736	12,251
Allowance for loan losses: individually evaluated	0	48
Allowance for loan losses: collectively evaluated	120	110
Allowance for loan losses	120	158	102
Commercial | Multi-family (5 or more) residential
LOANS
Loans receivable: Individually Evaluated	1,614	0
Loans receivable: Collectively Evaluated	54,197	31,070
Loans receivable	55,811	31,070
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	236	156
Allowance for loan losses	236	156	114
Commercial | Agricultural loans
LOANS
Loans receivable: Individually Evaluated	0	76
Loans receivable: Collectively Evaluated	3,164	4,243
Loans receivable	3,164	4,319
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	34	41
Allowance for loan losses	34	41	46
Commercial | Other commercial loans
LOANS
Loans receivable: Individually Evaluated	0	0
Loans receivable: Collectively Evaluated	17,289	16,535
Loans receivable	17,289	16,535
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	168	155
Allowance for loan losses	168	155	128
Consumer
LOANS
Loans receivable: Individually Evaluated	0	0
Loans receivable: Collectively Evaluated	16,286	16,741
Loans receivable	16,286	16,741
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	239	281
Allowance for loan losses	239	281	233
Unallocated
LOANS
Allowance for loan losses	$ 585	$ 585	$ 499

LOANS - Impaired Loans (Details

LOANS - Impaired Loans (Details)	Dec. 31, 2020USD ($)borrowerproperty	Dec. 31, 2019USD ($)
LOANS
Unpaid Principal Balance - with no allowance	$ 13,211,000	$ 2,139,000
Recorded Investment - with no allowance	9,736,000	2,111,000
Related Allowance - with no allowance	0	0
Unpaid Principal Balance - with allowance	8,082,000	3,375,000
Recorded investment - with allowance	8,082,000	3,375,000
Related Allowance - with allowance	925,000	1,051,000
Unpaid Principal Balance	21,293,000	5,514,000
Recorded Investment	17,818,000	5,486,000
Real estate loan
LOANS
Related Allowance - with allowance	416,000	678,000
Commercial and industrial
LOANS
Related Allowance - with no allowance	0	0
Loans secured by farm land
LOANS
Related Allowance - with no allowance	0	0
Multi-family (5 or more) residential
LOANS
Related Allowance - with no allowance	0	0
Agricultural loans
LOANS
Related Allowance - with no allowance	$ 0	0
Residential mortgage
LOANS
Number borrowers collateralized by one property with specific allowance | borrower	2
Number of properties collateralized each loan | property	1
Residential mortgage | first liens
LOANS
Related Allowance - with no allowance	$ 0	0
Residential mortgage | junior liens
LOANS
Related Allowance - with no allowance	0	0
Residential mortgage | Real estate loan
LOANS
Related Allowance - with allowance	153,000	176,000
Residential mortgage | Real estate loan | first liens
LOANS
Unpaid Principal Balance - with no allowance	1,248,000	645,000
Recorded Investment - with no allowance	1,248,000	617,000
Unpaid Principal Balance - with allowance	1,200,000	406,000
Recorded investment - with allowance	1,200,000	406,000
Related Allowance - with allowance	9,000	0
Residential mortgage | Real estate loan | junior liens
LOANS
Unpaid Principal Balance - with no allowance	160,000	42,000
Recorded Investment - with no allowance	105,000	42,000
Unpaid Principal Balance - with allowance	309,000	326,000
Recorded investment - with allowance	309,000	326,000
Related Allowance - with allowance	153,000	176,000
Commercial
LOANS
Related Allowance - with no allowance	0	0
Commercial | Real estate loan
LOANS
Unpaid Principal Balance - with no allowance	7,168,000	684,000
Recorded Investment - with no allowance	5,398,000	684,000
Unpaid Principal Balance - with allowance	6,501,000	0
Recorded investment - with allowance	6,501,000	0
Related Allowance - with allowance	691,000	0
Commercial | Commercial and industrial
LOANS
Unpaid Principal Balance - with no allowance	1,781,000	563,000
Recorded Investment - with no allowance	1,287,000	563,000
Unpaid Principal Balance - with allowance	72,000	904,000
Recorded investment - with allowance	72,000	904,000
Related Allowance - with allowance	72,000	149,000
Commercial | Loans secured by farm land
LOANS
Unpaid Principal Balance - with no allowance	84,000	129,000
Recorded Investment - with no allowance	84,000	129,000
Unpaid Principal Balance - with allowance	0	478,000
Recorded investment - with allowance	0	478,000
Related Allowance - with allowance	0	48,000
Commercial | Multi-family (5 or more) residential
LOANS
Unpaid Principal Balance - with no allowance	2,770,000	0
Recorded Investment - with no allowance	1,614,000	0
Commercial | Agricultural loans
LOANS
Unpaid Principal Balance - with no allowance	0	76,000
Recorded Investment - with no allowance	0	76,000
Commercial | Construction Loans
LOANS
Unpaid Principal Balance - with allowance	0	1,261,000
Recorded investment - with allowance	0	1,261,000
Related Allowance - with allowance	$ 0	$ 678,000

LOANS - Average Balance of Impa

LOANS - Average Balance of Impaired Loans and Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
LOANS
Average Investment in Impaired Loans	$ 11,246	$ 6,756
Interest Income Recognized on Impaired Loans on a Cash Basis	480	302
Residential mortgage
LOANS
Average Investment in Impaired Loans	2,302	1,754
Interest Income Recognized on Impaired Loans on a Cash Basis	141	103
Residential mortgage | Real estate loan | first liens
LOANS
Average Investment in Impaired Loans	1,853	1,440
Interest Income Recognized on Impaired Loans on a Cash Basis	116	87
Residential mortgage | Real estate loan | junior liens
LOANS
Average Investment in Impaired Loans	392	288
Interest Income Recognized on Impaired Loans on a Cash Basis	22	12
Residential mortgage | Home Equity Line of Credit [Member]
LOANS
Average Investment in Impaired Loans	57	26
Interest Income Recognized on Impaired Loans on a Cash Basis	3	4
Commercial
LOANS
Average Investment in Impaired Loans	8,944	4,999
Interest Income Recognized on Impaired Loans on a Cash Basis	339	199
Commercial | Real estate loan
LOANS
Average Investment in Impaired Loans	5,266	1,562
Interest Income Recognized on Impaired Loans on a Cash Basis	258	19
Commercial | Commercial and industrial
LOANS
Average Investment in Impaired Loans	2,542	1,186
Interest Income Recognized on Impaired Loans on a Cash Basis	34	25
Commercial | Construction Loans
LOANS
Average Investment in Impaired Loans	521	556
Interest Income Recognized on Impaired Loans on a Cash Basis	15	71
Commercial | Loans secured by farm land
LOANS
Average Investment in Impaired Loans	319	1,276
Interest Income Recognized on Impaired Loans on a Cash Basis	27	49
Commercial | Multi-family (5 or more) residential
LOANS
Average Investment in Impaired Loans	202	0
Interest Income Recognized on Impaired Loans on a Cash Basis	0	0
Commercial | Agricultural loans
LOANS
Average Investment in Impaired Loans	76	399
Interest Income Recognized on Impaired Loans on a Cash Basis	4	31
Commercial | Other commercial loans
LOANS
Average Investment in Impaired Loans	18	20
Interest Income Recognized on Impaired Loans on a Cash Basis	1	4
Consumer
LOANS
Average Investment in Impaired Loans	0	3
Interest Income Recognized on Impaired Loans on a Cash Basis	$ 0	$ 0

LOANS - Nonaccrual Loans and Lo

LOANS - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
LOANS
Past Due 90+ Days and Accruing	$ 1,975	$ 1,207
Nonaccrual	21,416	9,218
Residential mortgage
LOANS
Past Due 90+ Days and Accruing	1,123	1,002
Nonaccrual	7,064	5,078
Residential mortgage | Real estate loan | first liens
LOANS
Past Due 90+ Days and Accruing	838	878
Nonaccrual	6,387	4,679
Residential mortgage | Real estate loan | junior liens
LOANS
Past Due 90+ Days and Accruing	52	53
Nonaccrual	378	326
Residential mortgage | Home equity lines of credit
LOANS
Past Due 90+ Days and Accruing	233	71
Nonaccrual	299	73
Commercial
LOANS
Past Due 90+ Days and Accruing	796	165
Nonaccrual	14,267	4,124
Commercial | Real estate loan
LOANS
Past Due 90+ Days and Accruing	395	107
Nonaccrual	11,550	1,148
Commercial | Construction Loans
LOANS
Past Due 90+ Days and Accruing	0	0
Nonaccrual	49	1,311
Commercial | Commercial and industrial
LOANS
Past Due 90+ Days and Accruing	142	15
Nonaccrual	970	1,051
Commercial | Loans secured by farm land
LOANS
Past Due 90+ Days and Accruing	188	43
Nonaccrual	84	565
Commercial | Multi-family (5 or more) residential
LOANS
Past Due 90+ Days and Accruing	0	0
Nonaccrual	1,614	0
Commercial | Other commercial loans
LOANS
Past Due 90+ Days and Accruing	71	0
Nonaccrual	0	49
Consumer
LOANS
Past Due 90+ Days and Accruing	56	40
Nonaccrual	$ 85	$ 16

LOANS - Contractual Aging of Lo

LOANS - Contractual Aging of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
LOANS
Loans current and past due less than 30 days	$ 1,627,899	$ 1,166,748
Loans receivable	1,644,209	1,182,222
Past Due 30-89 Days
LOANS
Loans past due	8,607	10,023
Past Due 90+ Days
LOANS
Loans past due	7,703	5,451
Residential mortgage
LOANS
Loans current and past due less than 30 days	609,576	573,938
Loans receivable	620,172	586,580
Residential mortgage | Past Due 30-89 Days
LOANS
Loans past due	6,071	8,414
Residential mortgage | Past Due 90+ Days
LOANS
Loans past due	4,525	4,228
Residential mortgage | Real estate loan | first liens
LOANS
Loans current and past due less than 30 days	523,191	499,024
Loans receivable	532,947	510,641
Residential mortgage | Real estate loan | first liens | Past Due 30-89 Days
LOANS
Loans past due	5,703	7,839
Residential mortgage | Real estate loan | first liens | Past Due 90+ Days
LOANS
Loans past due	4,053	3,778
Residential mortgage | Real estate loan | junior liens
LOANS
Loans current and past due less than 30 days	27,009	27,041
Loans receivable	27,311	27,503
Residential mortgage | Real estate loan | junior liens | Past Due 30-89 Days
LOANS
Loans past due	111	83
Residential mortgage | Real estate loan | junior liens | Past Due 90+ Days
LOANS
Loans past due	191	379
Residential mortgage | Home equity lines of credit
LOANS
Loans current and past due less than 30 days	38,919	33,115
Loans receivable	39,301	33,638
Residential mortgage | Home equity lines of credit | Past Due 30-89 Days
LOANS
Loans past due	101	452
Residential mortgage | Home equity lines of credit | Past Due 90+ Days
LOANS
Loans past due	281	71
Residential mortgage | Construction Loans
LOANS
Loans current and past due less than 30 days	20,457	14,758
Loans receivable	20,613	14,798
Residential mortgage | Construction Loans | Past Due 30-89 Days
LOANS
Loans past due	156	40
Residential mortgage | Construction Loans | Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial
LOANS
Loans current and past due less than 30 days	1,002,260	576,314
Loans receivable	1,007,751	578,901
Commercial | Past Due 30-89 Days
LOANS
Loans past due	2,453	1,420
Commercial | Past Due 90+ Days
LOANS
Loans past due	3,038	1,167
Commercial | Real estate loan
LOANS
Loans current and past due less than 30 days	529,998	299,640
Loans receivable	531,810	301,227
Commercial | Real estate loan | Past Due 30-89 Days
LOANS
Loans past due	66	737
Commercial | Real estate loan | Past Due 90+ Days
LOANS
Loans past due	1,746	850
Commercial | Construction Loans
LOANS
Loans current and past due less than 30 days	42,590	33,505
Loans receivable	42,874	33,555
Commercial | Construction Loans | Past Due 30-89 Days
LOANS
Loans past due	284	0
Commercial | Construction Loans | Past Due 90+ Days
LOANS
Loans past due	0	50
Commercial | Commercial and industrial
LOANS
Loans current and past due less than 30 days	158,523	126,221
Loans receivable	159,577	126,374
Commercial | Commercial and industrial | Past Due 30-89 Days
LOANS
Loans past due	55	16
Commercial | Commercial and industrial | Past Due 90+ Days
LOANS
Loans past due	999	137
Commercial | Small Business Administration - Paycheck Protection Program
LOANS
Loans current and past due less than 30 days	132,269	0
Loans receivable	132,269	0
Commercial | Small Business Administration - Paycheck Protection Program | Past Due 30-89 Days
LOANS
Loans past due	0	0
Commercial | Small Business Administration - Paycheck Protection Program | Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial | Political subdivisions
LOANS
Loans current and past due less than 30 days	53,221	53,570
Loans receivable	53,221	53,570
Commercial | Political subdivisions | Past Due 30-89 Days
LOANS
Loans past due	0	0
Commercial | Political subdivisions | Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial | Commercial Construction And Land
LOANS
Loans receivable	42,874
Commercial | Loans secured by farm land
LOANS
Loans current and past due less than 30 days	11,419	11,455
Loans receivable	11,736	12,251
Commercial | Loans secured by farm land | Past Due 30-89 Days
LOANS
Loans past due	95	666
Commercial | Loans secured by farm land | Past Due 90+ Days
LOANS
Loans past due	222	130
Commercial | Multi-family (5 or more) residential
LOANS
Loans current and past due less than 30 days	53,860	31,070
Loans receivable	55,811	31,070
Commercial | Multi-family (5 or more) residential | Past Due 30-89 Days
LOANS
Loans past due	1,951	0
Commercial | Multi-family (5 or more) residential | Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial | Agricultural loans
LOANS
Loans current and past due less than 30 days	3,091	4,318
Loans receivable	3,164	4,319
Commercial | Agricultural loans | Past Due 30-89 Days
LOANS
Loans past due	2	1
Commercial | Agricultural loans | Past Due 90+ Days
LOANS
Loans past due	71	0
Commercial | Other commercial loans
LOANS
Loans current and past due less than 30 days	17,289	16,535
Loans receivable	17,289	16,535
Commercial | Other commercial loans | Past Due 30-89 Days
LOANS
Loans past due	0	0
Commercial | Other commercial loans | Past Due 90+ Days
LOANS
Loans past due	0	0
Consumer
LOANS
Loans current and past due less than 30 days	16,063	16,496
Loans receivable	16,286	16,741
Consumer | Past Due 30-89 Days
LOANS
Loans past due	83	189
Consumer | Past Due 90+ Days
LOANS
Loans past due	$ 140	$ 56

LOANS - Contractual Aging of No

LOANS - Contractual Aging of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
LOANS
Nonaccrual loans	$ 21,416	$ 9,218
Non accrual Loans [Member]
LOANS
Loans current and past due, nonaccrual	12,999	3,840
Nonaccrual loans	21,416	9,218
Non accrual Loans [Member] | Past Due 30-89 Days
LOANS
Nonaccrual loans	2,689	1,134
Non accrual Loans [Member] | Past Due 90+ Days
LOANS
Nonaccrual loans	$ 5,728	$ 4,244

LOANS - Aging of Troubled Debt

LOANS - Aging of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Troubled Debt Restructurings
Loans current and past due less than 30 days	$ 1,627,899	$ 1,166,748
Nonaccrual loans	21,416	9,218
Past Due 30-89 Days
Troubled Debt Restructurings
Loans past due	8,607	10,023
Past Due 90+ Days
Troubled Debt Restructurings
Loans past due	7,703	5,451
Troubled Debt Restructuring
Troubled Debt Restructurings
Loans current and past due less than 30 days	166	889
Nonaccrual loans	6,867	1,737
Troubled debt restructurings	7,451	2,626
Troubled Debt Restructuring | Past Due 30-89 Days
Troubled Debt Restructurings
Loans past due	0	0
Troubled Debt Restructuring | Past Due 90+ Days
Troubled Debt Restructurings
Loans past due	$ 418	$ 0

LOANS - Troubled Debt Restructu

LOANS - Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	7	12
Troubled debt restructurings, post-modification recorded investment	$ 7,271	$ 1,811
Residential mortgage | Real estate loan | junior liens | Reduced monthly payments and extended maturity date
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	0	1
Troubled debt restructurings, post-modification recorded investment	$ 0	$ 18
Residential mortgage | Real estate loan | junior liens | New loan at lower than risk-adjusted market rate to borrower from whom short sale of other collateral was accepted
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	1	0
Troubled debt restructurings, post-modification recorded investment	$ 30	$ 0
Commercial | Commercial and industrial | Principal and interest payment deferral non-Covid related
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	2	0
Troubled debt restructurings, post-modification recorded investment	$ 4,831	$ 0
Commercial | Commercial and industrial | Extended interest only payments and reduced monthly payments with a balloon payment at maturity
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	0	1
Troubled debt restructurings, post-modification recorded investment	$ 0	$ 1,261
Commercial | Commercial and industrial | Reduced monthly payments and extended maturity date
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	0	9
Troubled debt restructurings, post-modification recorded investment	$ 0	$ 448
Commercial | Commercial and industrial | Interest only payments for a nine-month period
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	1	0
Troubled debt restructurings, post-modification recorded investment	$ 240	$ 0
Commercial | Multi-family (5 or more) residential | Principal and interest payment deferral non-Covid related
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	3	0
Troubled debt restructurings, post-modification recorded investment	$ 2,170	$ 0
Commercial | Agricultural loans | Reduced monthly payments and extended maturity date
Troubled Debt Restructurings
Troubled debt restructurings, number of contracts	0	1
Troubled debt restructurings, post-modification recorded investment	$ 0	$ 84

LOANS - Payment Defaults on TDR

LOANS - Payment Defaults on TDR Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1	11
Troubled debt restructurings, recorded investment	$ 240	$ 530
Residential mortgage | Real estate loan | first liens
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	1
Troubled debt restructurings, recorded investment	$ 0	$ 261
Residential mortgage | Real estate loan | junior liens
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1	1
Troubled debt restructurings, recorded investment	$ 240	$ 18
Commercial | Real estate loan
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | loan	1
Commercial | Commercial and industrial
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	8
Troubled debt restructurings, recorded investment	$ 0	$ 170
Commercial | Agricultural loans
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	1
Troubled debt restructurings, recorded investment	$ 0	$ 81

LOANS - Foreclosed Residential

LOANS - Foreclosed Residential Real Estate (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Residential mortgage
LOANS
Foreclosed residential real estate	$ 80	$ 292

LOANS - Mortgage Loans in Proce

LOANS - Mortgage Loans in Process of Foreclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Residential mortgage
LOANS
Residential real estate in process of foreclosure	$ 1,246	$ 1,717

LOANS - Additional information

LOANS - Additional information (Details)	Mar. 27, 2020USD ($)	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)item	Apr. 01, 2019USD ($)	Dec. 31, 2018USD ($)
LOANS
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total			$ 6,286,000	$ 2,482,000
Recorded investment - with allowance			8,082,000	3,375,000
Specific allowances			925,000	$ 1,051,000
Number of commercial relationship of TDRs that defaulted | item				1
Provision for loan losses			3,913,000	$ 849,000
Loans receivable			1,644,209,000	1,182,222,000
Increase in expenses				3,064,000
Allowance for Loan losses			$ 11,385,000	$ 9,836,000		$ 9,309,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment			1	11
Financing receivable charge-offs			$ 2,465,000	$ 379,000
Recorded Investment			17,818,000	5,486,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend			0	0
Loans Modified, Recorded Investment			37,397,000
Financial Assets Facing Additional Credit Deterioration Due to Economic Impact of Covid-19
LOANS
Provision for loan losses			785,000
Commercial
LOANS
Loans receivable			1,007,751,000	578,901,000
Net decrease in allowance			1,675,000
Allowance for Loan losses			6,308,000	4,788,000		4,591,000
Financing receivable charge-offs			2,343,000	6,000
Loans Modified, Recorded Investment			35,002,000
Commercial | Maximum
LOANS
Threshold amount of loan balance for evaluating individual impairment loss			200,000
Commercial loan of $3,500,000
LOANS
Provision for loan losses			3,500,000
Specific Loans Portfolio Segment
LOANS
Provision for loan losses			2,238,000
Unallocated
LOANS
Allowance for Loan losses			585,000	585,000		499,000
Financing receivable charge-offs			0	0
Residential mortgage
LOANS
Loans receivable			620,172,000	586,580,000
Allowance for Loan losses			4,253,000	4,182,000		3,986,000
Financing receivable charge-offs			0	190,000
Loans Modified, Recorded Investment			2,334,000
Residential mortgage | Maximum
LOANS
Threshold amount of loan balance for evaluating individual impairment loss			400,000
Small Business Administration - Paycheck Protection Program
LOANS
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total			3,037,000
Amount of stimulus package designed	$ 2,000,000,000,000
Contractual principal balances			134,802,000
Accretion of fees received			1,945,000
Recorded Investment			132,269,000
Adjustment recorded in acquisition			504,000
Small Business Administration - Paycheck Protection Program | Commercial
LOANS
Loans receivable			132,269,000	0
Allowance for Loan losses			0
Construction Loans | Commercial
LOANS
Recorded investment - with allowance			0	1,261,000
Specific allowances			0	678,000
Loans receivable			42,874,000	33,555,000
Allowance for Loan losses			454,000	966,000		110,000
Financing receivable charge-offs			107,000	0
Construction Loans | Residential mortgage
LOANS
Loans receivable			20,613,000	14,798,000
Allowance for Loan losses			99,000	117,000		203,000
Financing receivable charge-offs			0	0
Real estate loan
LOANS
Specific allowances			416,000	678,000
Provision for loan losses		$ 107,000
Real estate loan | Commercial
LOANS
Recorded investment - with allowance			6,501,000	0
Specific allowances			691,000	0
Provision for loan losses			2,364,000
Loans receivable			531,810,000	301,227,000
Allowance for Loan losses			$ 3,051,000	1,921,000		$ 2,538,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | loan			1
Financing receivable charge-offs			$ 0	0
Real estate loan | Commercial | TDRs for which payment defaults occurred
LOANS
Specific allowances			0	0
Real estate loan | Commercial loan of $3,500,000
LOANS
Financing receivable charge-offs			2,219,000
Real estate loan | Specific Loans Portfolio Segment
LOANS
Net decrease in allowance			126,000
Real estate loan | Residential mortgage
LOANS
Specific allowances			$ 153,000	$ 176,000
Loans Receivable 1 | Credit Availability Concentration Risk
LOANS
Concentration Risk, Percentage			10.00%	10.00%
Purchased Credit Impaired
LOANS
Loans receivable			$ 6,841,000	$ 441,000
Loans Modified, Recorded Investment			6,841,000	441,000
Purchased Credit Impaired | Commercial
LOANS
Loans receivable			6,696,000	364,000
Purchased Credit Impaired | Residential mortgage
LOANS
Loans receivable			145,000	77,000
Purchased Credit Impaired | Small Business Administration - Paycheck Protection Program | Commercial
LOANS
Loans receivable			0
Purchased Credit Impaired | Construction Loans | Commercial
LOANS
Loans receivable			0	0
Purchased Credit Impaired | Construction Loans | Residential mortgage
LOANS
Loans receivable			0	0
Purchased Credit Impaired | Real estate loan | Commercial
LOANS
Loans receivable			4,298,000	364,000
Market Rate Adjustment
LOANS
Adjustment recorded in acquisition			$ 2,909,000	$ (1,807,000)
Monument Bancorp, Inc
LOANS
Loans					$ 259,300,000

BANK PREMISES AND EQUIPMENT - S

BANK PREMISES AND EQUIPMENT - Summary of Bank Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
BANK PREMISES AND EQUIPMENT
Property, plant and equipment	$ 52,127	$ 46,875
Less: accumulated depreciation	(30,601)	(29,705)
Net	21,526	17,170
Land [Member]
BANK PREMISES AND EQUIPMENT
Property, plant and equipment	3,826	3,199
Building and Building Improvements [Member]
BANK PREMISES AND EQUIPMENT
Property, plant and equipment	33,058	28,403
Furniture and Fixtures [Member]
BANK PREMISES AND EQUIPMENT
Property, plant and equipment	15,235	13,618
Construction in Progress [Member]
BANK PREMISES AND EQUIPMENT
Property, plant and equipment	$ 8	$ 1,655

BANK PREMISES AND EQUIPMENT - D

BANK PREMISES AND EQUIPMENT - Depreciation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Depreciation expense	$ 1,981	$ 1,749
Occupancy expense, net
Depreciation expense	857	775
Furniture and fixtures expense
Depreciation expense	738	692
Data Processing [Member]
Depreciation expense	338	239
Telecommunications Expense [Member]
Depreciation expense	$ 48	$ 43

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Core Deposit Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
GOODWILL AND OTHER INTANGIBLE ASSETS, NET
Gross amount	$ 6,639	$ 3,495
Accumulated amortization	(2,788)	(2,248)
Net	$ 3,851	$ 1,247

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Amortization Expense Core Deposit Intangibles (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Amortization Expense
Amortization expense	$ 540,000	$ 223,000
Covenant Financial Inc.
Amortization Expense
Amortization expense	292,000
Monument Bancorp, Inc
Amortization Expense
Amortization expense	$ 248,000	214,000
Previous Acquisitions
Amortization Expense
Amortization expense		$ 9,000

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Changes in the carrying amount of goodwill
Balance, beginning of period	$ 28,388,000	$ 11,942,000
Goodwill arising in business combination	24,117,000	16,446,000
Balance, end of period	52,505,000	28,388,000
Goodwill impairment	$ 0	$ 0

DEPOSITS - Scheduled Maturities

DEPOSITS - Scheduled Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2020USD ($)
DEPOSITS
2021	$ 262,358
2022	76,447
2023	27,730
2024	12,621
2025	11,192
2026	59
Total	$ 390,407

DEPOSITS - Remaining Maturities

DEPOSITS - Remaining Maturities of Time Deposits In Excess of $250,000 (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
DEPOSITS
Time Deposits, at or Above FDIC Insurance Limit	$ 103,024,000	$ 84,476,000
Three months or less	25,566,000
Over 3 months through 12 months	54,883,000
Over 1 year through 3 years	15,574,000
Over 3 years	7,001,000
Total	$ 103,024,000	$ 84,476,000

BORROWED FUNDS AND SUBORDINAT_3

BORROWED FUNDS AND SUBORDINATED DEBT - Short-term borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term borrowings	$ 20,022	$ 86,220
Federal Home Loan Bank of Pittsburgh
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term borrowings	18,066	84,292
FHLB-Pittsburgh borrowings
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term borrowings	18,066	84,292
Overnight Borrowing | Federal Home Loan Bank of Pittsburgh
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term borrowings	0	64,000
Customer repurchase agreements
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term borrowings	1,956	1,928
Other short-term advances | Federal Home Loan Bank of Pittsburgh
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term borrowings	$ 18,066	$ 20,292

BORROWED FUNDS AND SUBORDINAT_4

BORROWED FUNDS AND SUBORDINATED DEBT - Short-term borrowings Additional information (Details)	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
BORROWED FUNDS AND SUBORDINATED DEBT
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0.40%	1.88%
Letter of credit	$ 0	$ 0
Line of Credit Facility, Maximum Month-end Outstanding Amount	56,647,000	86,220,000
Other Correspondent Banks
BORROWED FUNDS AND SUBORDINATED DEBT
Line of Credit Facility, Maximum Borrowing Capacity	45,000,000	45,000,000
Long-term Line of Credit, Total	0	0
Federal Reserve Bank of Philadelphia | Collateral Pledged
BORROWED FUNDS AND SUBORDINATED DEBT
Investment pledged as collateral	$ 15,126,000	$ 14,728,000
Customer repurchase agreements
BORROWED FUNDS AND SUBORDINATED DEBT
Debt, Weighted Average Interest Rate	0.10%	0.10%
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned, Total	$ 1,980,000	$ 1,951,000
Federal Home Loan Bank of Pittsburgh
BORROWED FUNDS AND SUBORDINATED DEBT
Line of Credit Facility, Maximum Borrowing Capacity	771,199,000	552,546,000
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	1,049,690,000	778,877,000
Line of Credit Facility, Remaining Borrowing Capacity	698,977,000	416,127,000
Federal Home Loan Bank of Pittsburgh | Other Assets
BORROWED FUNDS AND SUBORDINATED DEBT
Federal Home Loan Bank Stock	9,720,000	10,131,000
Federal Home Loan Bank of Pittsburgh | Federal Reserve Bank of Philadelphia
BORROWED FUNDS AND SUBORDINATED DEBT
Line of Credit Facility, Maximum Borrowing Capacity	14,654,000	14,244,000
Long-term Line of Credit, Total	$ 0	$ 0
Federal Home Loan Bank of Pittsburgh | Overnight Borrowing
BORROWED FUNDS AND SUBORDINATED DEBT
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate		1.81%
Federal Home Loan Bank of Pittsburgh | Federal Home Loan Bank Advances 1
BORROWED FUNDS AND SUBORDINATED DEBT
Number of Short-term Advances	5	7
Short-term Borrowing, Amount of Each Borrowing	$ 18,000,000	$ 20,297,000
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0.43%	2.28%

BORROWED FUNDS AND SUBORDINAT_5

BORROWED FUNDS AND SUBORDINATED DEBT - Long-term Borrowing (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Long-term Borrowing
Long-term borrowings	$ 54,608	$ 52,127
Loans matured in 2020 with a weighted-average rate of 2.71%
Long-term Borrowing
Rate	2.71%	2.71%
Loans maturing in 2021 with a weighted-average effective rate of 1.36%
Long-term Borrowing
Rate	1.36%	1.36%
Loans maturing in 2022 with a weighted-average rate of 0.60%
Long-term Borrowing
Rate	0.60%	0.60%
Loans maturing in 2023 with a weighted-average rate of 0.73%
Long-term Borrowing
Rate	0.73%	0.73%
Loans maturing in 2024 with a weighted-average rate of 0.75%
Long-term Borrowing
Rate	0.75%	0.75%
Loan maturing in 2025 with a rate of 4.91%
Long-term Borrowing
Rate	4.91%	4.91%
Federal Home Loan Bank of Pittsburgh
Long-term Borrowing
Long-term borrowings	$ 54,608	$ 52,127
Federal Home Loan Bank of Pittsburgh | Loans matured in 2020 with a weighted-average rate of 2.71%
Long-term Borrowing
Long-term borrowings	0	5,069
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2021 with a weighted-average effective rate of 1.36%
Long-term Borrowing
Long-term borrowings	26,098	6,000
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2022 with a weighted-average rate of 0.60%
Long-term Borrowing
Long-term borrowings	15,682	20,000
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2023 with a weighted-average rate of 0.73%
Long-term Borrowing
Long-term borrowings	7,224	20,500
Federal Home Loan Bank of Pittsburgh | Loans maturing in 2024 with a weighted-average rate of 0.75%
Long-term Borrowing
Long-term borrowings	5,137	0
Federal Home Loan Bank of Pittsburgh | Loan maturing in 2025 with a rate of 4.91%
Long-term Borrowing
Long-term borrowings	$ 467	$ 558

BORROWED FUNDS AND SUBORDINAT_6

BORROWED FUNDS AND SUBORDINATED DEBT - Subordinated Debt (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Subordinated debt	$ 16,553,000	$ 6,500,000
6.25% maturing in June 2026 and redeemable at par in June 2021
Debt Instrument [Line Items]
Subordinated debt	8,027,000	0
Aggregate par value	$ 8,000,000	$ 8,000,000
Stated interest rate	6.25%	6.25%
6.50% maturing in April 2027 and redeemable at par in April 2022
Debt Instrument [Line Items]
Subordinated debt	$ 6,500,000	$ 6,500,000
Aggregate par value	$ 6,500,000	6,500,000
Stated interest rate	6.50%
6.50% maturing in July 2027 and redeemable at par in July 2022
Debt Instrument [Line Items]
Subordinated debt	$ 2,026,000	0
Aggregate par value	$ 2,000,000	$ 2,000,000
Stated interest rate	6.50%	6.50%

EMPLOYEE AND POSTRETIREMENT B_3

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Funded Status of Defined Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Benefit obligation at beginning of year	$ 976	$ 870
Service cost	0	0
Interest cost	23	28
Plan participants' contributions	0	0
Actuarial (gain) loss	108	91
Benefits paid	(6)	(13)
Benefit obligation at end of year	1,101	976
Fair value of plan assets at beginning of year	971	847
Actual return on plan assets	97	137
Employer contribution	0	0
Plan participants' contributions	0	0
Benefits paid	(6)	(13)
Fair value of plan assets at end of year	1,062	971
Funded status at end of year	(39)	(5)
Other Postretirement Benefits Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Benefit obligation at beginning of year	1,326	1,349
Service cost	46	33
Interest cost	39	50
Plan participants' contributions	185	184
Actuarial (gain) loss	11	(63)
Benefits paid	(260)	(227)
Benefit obligation at end of year	1,347	1,326
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contribution	75	43
Plan participants' contributions	185	184
Benefits paid	(260)	(227)
Fair value of plan assets at end of year	0	0
Funded status at end of year	$ (1,347)	$ (1,326)

EMPLOYEE AND POSTRETIREMENT B_4

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Liabilities in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Pension Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Accrued interest and other liabilities	$ 39	$ 5
Other Postretirement Benefits Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Accrued interest and other liabilities	$ 1,347	$ 1,326

EMPLOYEE AND POSTRETIREMENT B_5

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Items Included in Accumulated Other Comprehensive Income (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Pension Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Prior service cost	$ 0	$ 0
Net actuarial loss (gain)	277,000	255,000
Total	277,000	255,000
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	19,000
Defined Benefit Plan, Accumulated Benefit Obligation	1,101,000	976,000
Other Postretirement Benefits Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Prior service cost	(217,000)	(248,000)
Net actuarial loss (gain)	(211,000)	(236,000)
Total	(428,000)	$ (484,000)
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	5,000
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 31,000

EMPLOYEE AND POSTRETIREMENT B_6

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Service cost	$ 0	$ 0
Interest cost	23	28
Expected return on plan assets	(27)	(22)
Prior service cost	0	0
Recognized net actuarial loss (gain)	16	20
Total net periodic benefit cost	12	26
Other Postretirement Benefits Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Service cost	46	33
Interest cost	39	50
Expected return on plan assets	0	0
Prior service cost	(31)	(31)
Recognized net actuarial loss (gain)	(14)	(21)
Total net periodic benefit cost	$ 40	$ 31

EMPLOYEE AND POSTRETIREMENT B_7

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Assumptions Used to Determine Net Periodic Benefit Cost (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Discount rate	3.10%	4.10%
Expected return on plan assets	4.99%	4.68%
Discount rate	2.30%	3.10%
Other Postretirement Benefits Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Discount rate	3.25%	4.50%
Discount rate	2.50%	3.25%

EMPLOYEE AND POSTRETIREMENT B_8

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Future Benefit Payments (Details)	Dec. 31, 2020USD ($)
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Estimated Minimum Contribution to Defined Benefit Pension Plan	$ 0
Pension Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
2021	499,000
2022	8,000
2023	192,000
2024	8,000
2025	8,000
2026-2030	367,000
Other Postretirement Benefits Plan [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
2021	79,000
2022	85,000
2023	77,000
2024	83,000
2025	83,000
2026-2030	$ 407,000

EMPLOYEE AND POSTRETIREMENT B_9

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Plan Assets Allocation (Details)	Dec. 31, 2020	Dec. 31, 2019
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Percentage of plan assets	100.00%	100.00%
Cash and Cash Equivalents [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Percentage of plan assets	2.00%	3.00%
Debt Securities [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Percentage of plan assets	36.00%	38.00%
Equity Securities [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Percentage of plan assets	51.00%	49.00%
Alternative Funds [Member]
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Percentage of plan assets	11.00%	10.00%

EMPLOYEE AND POSTRETIREMENT _10

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Profit Sharing and Deferred Compensation Plans (Details)	Dec. 31, 2020USD ($)shares	Jul. 01, 2020USD ($)	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)shares
Defined Contribution Plan Disclosure [Line Items]
Matching contributions			$ 1,050,000	$ 891,000
Employee Stock Ownership Plan (ESOP), Diversification Feature, Age Requirement	55		55
Deferred Compensation Arrangement with Individual, Requisite Service Period			10 years
Employee Stock Ownership Plan (ESOP), Diversification Feature Percentage	50.00%		50.00%
Employee Stock Ownership Plan (ESOP), Policy Diversification Feature Term			6 years
Employee Stock Ownership Plan (ESOP), Shares Repurchased | shares			0	0
Employee Stock Ownership Plan (ESOP), Shares in ESOP, Total | shares	481,478		481,478	473,171
Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP			$ 912,000	$ 718,000
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 366,000
Pension and Other Postretirement Benefits Cost (Reversal of Cost), Total			7,463,000	5,837,000
Deferred Compensation, Monthly Payments To Be Made To Executives Or His Heirs		$ 1,000,000
Deferred Compensation Arrangement with Individual, Maximum Contractual Term		10 years
Deferred Compensation Arrangement with Individual, Recorded Liability		$ 499,000
Deferred Compensation Liability Discount Rate	1.50%	1.50%
Deferred Compensation Liability, Current and Noncurrent	$ 865,000		865,000
Merger Related Expenses [Member]
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 360,000
Pension And Other Employee Benefits Expenses [Member]
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense		$ 6,000
Officers Nonqualified Deferred Compensation Arrangement [Member]
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense			$ 286,000	$ 251,000

EMPLOYEE AND POSTRETIREMENT _11

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Based Compensation Paragraphs (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value			$ 63,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			128,000	$ 276,000
Share-based Payment Arrangement, Expense			1,050,000	798,000
Forecast
STOCK-BASED COMPENSATION PLANS
Share-based Payment Arrangement, Expense		$ 1,400,000
Share-based Payment Arrangement, Option [Member]
STOCK-BASED COMPENSATION PLANS
Share-based Payment Arrangement, Expense			0	0
Restricted Stock
STOCK-BASED COMPENSATION PLANS
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 1,340,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			70,940
Share-based Payment Arrangement, Expense			$ 1,050,000	$ 798,000
Stock Incentive Plan
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			850,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			166,603
Stock Incentive Plan | Share-based Payment Arrangement, Option [Member]
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			6 months
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Stock Incentive Plan | Restricted Stock | Subsequent event
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	63,402
Stock Incentive Plan | Restricted Stock | Employees [Member]
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 years	3 years
Stock Incentive Plan | Performance Shares | Employees [Member]
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 years	3 years
Independent Directors Stock Incentive Plan
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			235,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			103,143
Independent Directors Stock Incentive Plan | Restricted Stock | Subsequent event
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	10,989
Independent Directors Stock Incentive Plan | Restricted Stock | Director
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			1 year	1 year

EMPLOYEE AND POSTRETIREMENT _12

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
STOCK-BASED COMPENSATION PLANS
Share-based Payment Arrangement, Expense	$ 1,050	$ 798
Restricted Stock
STOCK-BASED COMPENSATION PLANS
Share-based Payment Arrangement, Expense	1,050	798
Share-based Payment Arrangement, Option [Member]
STOCK-BASED COMPENSATION PLANS
Share-based Payment Arrangement, Expense	$ 0	$ 0

EMPLOYEE AND POSTRETIREMENT _13

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Non-vested Stock Options and Restricted Stock Activity (Details) - Restricted Stock	12 Months Ended
	Dec. 31, 2020$ / sharesshares
STOCK-BASED COMPENSATION PLANS
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance | shares	68,200
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 24.53
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | shares	70,940
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 23.18
Vested, restricted shares (in shares) | shares	(31,908)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 24.97
Forfeited, restricted shares (in shares) | shares	(5,290)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 25.09
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance | shares	101,942
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 23.42

EMPLOYEE AND POSTRETIREMENT _14

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Awarded Shares of Restricted Stock Under Stock Incentive Plan (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock | Independent Directors Stock Incentive Plan | Director
STOCK-BASED COMPENSATION PLANS
Shares awarded (in shares)	7,580	7,620
Restricted Stock | Stock Incentive Plan
STOCK-BASED COMPENSATION PLANS
Shares awarded (in shares)	70,940	48,137
Restricted Stock | Stock Incentive Plan | Employees [Member]
STOCK-BASED COMPENSATION PLANS
Shares awarded (in shares)	45,457	26,827
Performance Shares | Stock Incentive Plan | Employees [Member]
STOCK-BASED COMPENSATION PLANS
Shares awarded (in shares)	17,903	13,690

EMPLOYEE AND POSTRETIREMENT _15

EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Outstanding, beginning of year (in shares)	75,897	115,714
Outstanding, beginning of year (in dollars per share)	$ 18.69	$ 18.49
Granted (in shares)	0	0
Exercised (in shares)	(17,222)	(31,304)
Exercised (in dollars per share)	$ 18.25	$ 17.65
Forfeited (in shares)	(1,564)	0
Forfeited (in dollars per share)	$ 15.06
Expired (in shares)	0	(8,513)
Expired (in dollars per share)		$ 19.88
Outstanding, end of year (in shares)	57,111	75,897
Outstanding, end of year (in dollars per share)	$ 18.92	$ 18.69
Options exercisable at year-end (in shares)	57,111	75,897
Options exercisable at year-end (in dollars per share)	$ 18.92	$ 18.69
Weighted-average fair value of options forfeited (in dollars per share)	$ 4.26

INCOME TAXES - Net Deferred Tax

INCOME TAXES - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for loan losses	$ 2,154	$ 2,080
Unrealized holding losses on securities	1,930	640
Net operating loss carryforward	896	0
Operating leases liability	724	344
Other deferred tax assets	3,089	2,173
Total deferred tax assets	8,793	5,237
Deferred tax liabilities:
Unrealized holding gains on securities	3,104	934
Defined benefit plans - ASC 835	32	49
Bank premises and equipment	1,216	763
Core deposit intangibles	840	272
Right-of-use assets from operating leases	724	344
Other deferred tax liabilities	172	257
Total deferred tax liabilities	6,088	2,619
Deferred tax asset, net	$ 2,705	$ 2,618

INCOME TAXES - Provision for In

INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Provision for income taxes
Currently payable	$ 4,230	$ 3,618
Tax expense resulting from allocations of certain tax benefits to equity or as a reduction in other assets	121	115
Deferred	(361)	172
Total provision	$ 3,990	$ 3,905

INCOME TAXES - Reconciliation o

INCOME TAXES - Reconciliation of Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
INCOME TAXES
Expected provision									$ 4,875	$ 4,916
Tax-exempt interest income									(808)	(853)
Increase in cash surrender value and other income from life insurance, net									(170)	(91)
ESOP Dividends									(110)	(113)
State income tax, net of Federal benefit									172	122
Other, net									31	(76)
Income Tax Expense (Benefit), Total	$ 1,481	$ 438	$ 1,255	$ 816	$ 1,135	$ 1,096	$ 693	$ 981	$ 3,990	$ 3,905
Expected provision, percentage									21.00%	21.00%
Tax-exempt interest income, percentage									(3.50%)	(3.60%)
Increase in cash surrender value and other income from life insurance, net, percentage									(0.70%)	(0.40%)
ESOP Dividends, percentage									(0.50%)	(0.50%)
State income tax, net of federal benefit, percentage									0.70%	0.50%
Other, net, percentage									0.10%	(0.30%)
Effective income tax provision, percentage									17.20%	16.70%

INCOME TAXES - Paragraphs (Deta

INCOME TAXES - Paragraphs (Details)	12 Months Ended
	Dec. 31, 2020USD ($)
Net operating loss	$ 4,300,000
Annual offset of net operating loss	$ 563,000
Threshold percentage of taxable income to use net operating loss	80.00%
Unrecognized Tax Benefits, Ending Balance	$ 0
Covenant Financial Inc.
Net operating loss	$ 4,600,000

RELATED PARTY TRANSACTIONS - (D

RELATED PARTY TRANSACTIONS - (Details)	12 Months Ended
	Dec. 31, 2020USD ($)persondirector	Dec. 31, 2019USD ($)persondirector
Related Party Transactions
Number of directors | director	13	11
Number of executive directors | person	9	8
Related Party Deposit Liabilities	$ 13,182,000	$ 8,828,000
Management [Member]
Related Party Transactions
Beginning Balance	14,455,000	15,144,000
New Loans	242,000	1,027,000
Repayments	(2,150,000)	(1,850,000)
Other Changes	5,898,000	134,000
Ending Balance	$ 18,445,000	$ 14,455,000

OFF-BALANCE SHEET RISK - Financ

OFF-BALANCE SHEET RISK - Financial Instruments Whose Contract Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Commitments to Extend Credit [Member]
Off-Balance Sheet Risk
Credit risk financial instrument	$ 317,470	$ 256,896
Standby Letters of Credit [Member]
Off-Balance Sheet Risk
Credit risk financial instrument	$ 9,107	$ 8,446

OFF-BALANCE SHEET RISK - Standb

OFF-BALANCE SHEET RISK - Standby Letters of Credit Expirations (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Off-Balance Sheet Risk
Letters of Credit Outstanding, Amount	$ 0	$ 0
Standby Letters of Credit [Member]
Off-Balance Sheet Risk
2021	8,701
2022	406
Total	$ 9,107	$ 8,446

OPERATING LEASE COMMITMENTS A_3

OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Assets and Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating Leases Commitments
Operating Lease, Weighted Average Discount Rate, Percent	2.07%
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 167,000	$ 745,000
Covenant Financial Inc.
Operating Leases Commitments
Operating Lease, Right-of-Use Asset	1,956,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	167,000
Operating Lease, Liability	1,956,000
Other Assets
Operating Leases Commitments
Operating Lease, Right-of-Use Asset	3,446,000	1,637,000
Accrued Interest and Other Liabilities
Operating Leases Commitments
Operating Lease, Liability	$ 3,446,000	$ 1,637,000
Minimum
Operating Leases Commitments
Lessee, Operating Lease, Renewal Term	1 year
Lessee, Operating Lease, Discount Rate	0.84%
Maximum
Operating Leases Commitments
Lessee, Operating Lease, Renewal Term	8 years
Lessee, Operating Lease, Discount Rate	3.50%

OPERATING LEASE COMMITMENTS A_4

OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating Leases Commitments
Operating lease expense	$ 371	$ 251
Occupancy expense, net
Operating Leases Commitments
Operating lease expense	342	214
Furniture and fixtures expense
Operating Leases Commitments
Operating lease expense	$ 29	$ 37

OPERATING LEASE COMMITMENTS A_5

OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Maturity (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
2021	$ 484,000
2022	465,000
2023	453,000
2024	446,000
2025	426,000
Thereafter	1,494,000
Total lease payments	3,768,000
Discount on cash flows	(322,000)
Accrued Interest and Other Liabilities
Lessee, Lease, Description [Line Items]
Total lease liabilities	$ 3,446,000	$ 1,637,000

OPERATING LEASE COMMITMENTS A_6

OPERATING LEASE COMMITMENTS AND CONTINGENCIES - Trust Department Tax Reporting Contingency (Details) - Trust Department Tax Reporting Contingency - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Trust Department Tax Reporting Contingency
Estimated losses	$ 571,000	$ 12,000
Accrued Interest and Other Liabilities
Trust Department Tax Reporting Contingency
Tax compliance matters	$ 322,000

REGULATORY MATTERS - Capital Am

REGULATORY MATTERS - Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Total capital to risk-weighted assets - actual amount	$ 260,015	$ 228,057
Total capital to risk-weighted assets - actual ratio	17.49	20.70
Total capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount	$ 156,113	$ 115,689
Tier 1 capital to risk-weighted assets - actual amount	$ 231,577	$ 211,388
Tier 1 capital to risk-weighted assets - actual ratio	15.58	19.19
Tier 1 capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount	$ 126,377	$ 93,653
Common equity Tier 1 - amount	$ 231,577	$ 211,388
Common equity Tier 1 - ratio	15.58	19.19
Common equity Tier 1 - minimum to meet the corporation's policy thresholds amount	$ 104,075	$ 77,126
Tier 1 capital average - amount	$ 231,577	$ 211,388
Tier 1 capital average - ratio	10.34	13.10
Tier 1 capital average - minimum to meet the corporation's policy threshold amount	$ 179,206	$ 129,126
Citizens and Northern Bank
Total capital to risk-weighted assets - actual amount	$ 236,943	$ 205,863
Total capital to risk-weighted assets - actual ratio	15.98	18.75
Total capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount	$ 155,665	$ 115,260
Total capital to risk-weighted assets - minimum capital requirement amount	118,602	87,817
Total capital to risk-weighted assets - minimum capital requirement with conservation buffer amount	155,665	115,260
Total capital to risk-weighted assets - minimum to be well capitalized under prompt corrective action provisions amount	148,252	109,771
Tier 1 capital to risk-weighted assets - actual amount	$ 225,058	$ 195,694
Tier 1 capital to risk-weighted assets - actual ratio	15.18	17.83
Tier 1 capital to risk-weighted assets - minimum to meet the corporation's policy thresholds amount	$ 126,015	$ 93,306
Tier 1 capital to risk-weighted assets - minimum capital requirement amount	88,951	65,863
Tier 1 capital to risk-weighted assets - minimum capital requirement with conservation buffer amount	126,015	93,306
Tier 1 capital to risk-weighted assets - minimum to be well capitalized under prompt corrective action provisions amount	118,602	87,817
Common equity Tier 1 - amount	$ 225,058	$ 195,694
Common equity Tier 1 - ratio	15.18	17.83
Common equity Tier 1 - minimum to meet the corporation's policy thresholds amount	$ 103,777	$ 76,840
Common equity Tier 1 - minimum capital requirement amount	66,714	49,397
Common equity Tier 1 - capital conservation buffer amount	103,777	76,840
Common equity Tier 1 Capital - minimum to be well capitalized under prompt corrective action provisions amount	96,364	71,351
Tier 1 capital average - amount	$ 225,058	$ 195,694
Tier 1 capital average - ratio	10.12	12.24
Tier 1 capital average - minimum to meet the corporation's policy threshold amount	$ 177,919	$ 127,879
Tier 1 capital average - minimum capital amount	88,959	63,940
Tier 1 capital average - minimum to be well capitalized amount	$ 111,199	$ 79,925

REGULATORY MATTERS - Transition

REGULATORY MATTERS - Transition Schedule for New Ratios, Including the Capital Conservation Buffer (Details) - Phased in Beginning 2018 [Member]	Dec. 31, 2020
Minimum common equity tier 1 capital ratio	4.50%
Minimum common equity tier 1 capital ratio plus capital conservation buffer	7.00%
Minimum tier 1 capital ratio	6
Minimum tier 1 capital ratio plus capital conservation buffer	8.50%
Minimum total capital ratio	8
Minimum total capital ratio plus capital conservation buffer	10.50%

REGULATORY MATTERS - Payout Res

REGULATORY MATTERS - Payout Restrictions Based on the Capital Conservation Buffer (Details)	Dec. 31, 2020
Range One [Member]
Maximum Payout	60.00%
Range Two [Member]
Maximum Payout	40.00%
Range Three [Member]
Maximum Payout	20.00%
Range Four [Member]
Maximum Payout	0.00%

REGULATORY MATTERS - Paragraphs

REGULATORY MATTERS - Paragraphs (Details)	Dec. 31, 2020USD ($)
REGULATORY MATTERS
Capital Conservation Buffer	7.98%
Retained Earnings, Unappropriated	$ 76,527,000
Tangible Capital to Tangible Assets	10
Tangible Capital	$ 22,509,000

PARENT COMPANY ONLY - Condensed

PARENT COMPANY ONLY - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Other assets	$ 32,831	$ 22,137
TOTAL ASSETS	2,239,100	1,654,145
LIABILITIES AND STOCKHOLDERS' EQUITY
Subordinated debt	16,553	6,500
Other liabilities	27,692	12,186
Stockholders' equity	299,756	244,452	$ 197,368
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,239,100	1,654,145
Parent Company [Member]
ASSETS
Cash	7,246	6,485
Other assets	4	109
TOTAL ASSETS	316,468		$ 251,029
LIABILITIES AND STOCKHOLDERS' EQUITY
Subordinated debt	16,553	6,500
Other liabilities	159	77
Stockholders' equity	299,756	244,452
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	316,468	251,029
Subsidiaries [Member] | Citizens and Northern Bank
ASSETS
Investment in subsidiaries	292,455	228,413
Subsidiaries [Member] | Citizens and Northern Investment Corporation
ASSETS
Investment in subsidiaries	12,959	12,353
Subsidiaries [Member] | Bucktail Life Insurance Company
ASSETS
Investment in subsidiaries	$ 3,804	$ 3,669

PARENT COMPANY ONLY - Condens_2

PARENT COMPANY ONLY - Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Income before distributions in excess of income from subsidiaries	$ 8,251	$ 3,286	$ 6,693	$ 4,982	$ 6,593	$ 6,403	$ 4,342	$ 6,071	$ 23,212	$ 23,409
NET INCOME	$ 6,770	$ 2,848	$ 5,438	$ 4,166	$ 5,458	$ 5,307	$ 3,649	$ 5,090	19,222	19,504
Parent Company [Member]
Dividends from Citizens & Northern Bank									38,507	24,600
Expenses									1,488	1,086
Income before distributions in excess of income from subsidiaries									37,019	23,514
Distributions in excess of income from subsidiaries									(17,797)	(4,010)
NET INCOME									$ 19,222	$ 19,504

PARENT COMPANY ONLY - Condens_3

PARENT COMPANY ONLY - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 6,770	$ 2,848	$ 5,438	$ 4,166	$ 5,458	$ 5,307	$ 3,649	$ 5,090	$ 19,222	$ 19,504
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in other assets									(2,645)	1,188
Increase (decrease) in other liabilities									2,473	(2,068)
Net Cash Provided by Operating Activities									24,784	22,461
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of vested restricted stock for tax withholding									(163)	(189)
Dividends paid									(14,469)	(14,041)
Net Cash Used in Financing Activities									(56,469)	(46,834)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS									64,895	(1,705)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR				31,122				32,827	31,122	32,827
CASH AND CASH EQUIVALENTS, END OF YEAR	96,017				31,122				96,017	31,122
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid									10,742	9,601
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income									19,222	19,504
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion of purchase accounting adjustment									(38)	0
Loss on repayment of subordinated debt									0	10
Distributions in excess of income from subsidiaries									17,797	4,010
Decrease (increase) in other assets									105	(107)
Increase (decrease) in other liabilities									13	(81)
Net Cash Provided by Operating Activities									37,099	23,336
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash used in business combination									(21,837)	(9,698)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of subordinated debt									0	510
Proceeds from sale of treasury stock									131	198
Purchase of vested restricted stock for tax withholding									(163)	(189)
Dividends paid									(14,469)	(14,041)
Net Cash Used in Financing Activities									(14,501)	(14,542)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS									761	(904)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR				$ 6,485				$ 7,389	6,485	7,389
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 7,246				$ 6,485				7,246	6,485
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Investment of net assets acquired in business combination in Citizens & Northern Bank									73,426	49,765
Common equity issued in business combination									41,429	32,953
Subordinated debt assumed in business combination									10,091	7,000
Other liabilities assumed in business combination									69	114
Interest paid									$ 655	$ 461

SUMMARY OF QUARTERLY CONSOLID_3

SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA (Unaudited) - Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
SUMMARY OF QUARTERLY CONSOLIDATED FINANCIAL DATA
Interest income	$ 21,859	$ 21,751	$ 16,513	$ 17,037	$ 17,290	$ 17,277	$ 17,139	$ 13,065	$ 77,160	$ 64,771
Interest expense	2,104	2,469	2,267	2,755	2,999	3,000	2,934	1,350	9,595	10,283
Net interest income	19,755	19,282	14,246	14,282	14,291	14,277	14,205	11,715	67,565	54,488
Provision (credit) for loan losses	620	1,941	(176)	1,528	652	1,158	(4)	(957)	3,913	849
Net interest income after provision (credit) for loan losses	19,135	17,341	14,422	12,754	13,639	13,119	14,209	12,672	63,652	53,639
Other income	6,565	6,970	5,528	5,281	5,066	4,963	4,849	4,406	24,344	19,284
Net gains on available-for-sale debt securities	144	25	0	0	3	13	7	0	169	23
Loss on prepayment of borrowings	1,636	0	0	0
Merger-related expenses	182	6,402	983	141	281	206	3,301	311	7,708	4,099
Other expenses	15,775	14,648	12,274	12,912	11,834	11,486	11,422	10,696
Income before income tax provision	8,251	3,286	6,693	4,982	6,593	6,403	4,342	6,071	23,212	23,409
Income tax provision	1,481	438	1,255	816	1,135	1,096	693	981	3,990	3,905
Net income	6,770	2,848	5,438	4,166	5,458	5,307	3,649	5,090	19,222	19,504
Net income attributable to common shares	$ 6,727	$ 2,830	$ 5,405	$ 4,146	$ 5,431	$ 5,281	$ 3,630	$ 5,063	$ 19,106	$ 19,404
Net income per share - basic (in dollars per share)	$ 0.43	$ 0.18	$ 0.39	$ 0.30	$ 0.40	$ 0.39	$ 0.27	$ 0.41	$ 1.30	$ 1.46
Net income per share - diluted (in dollars per share)	$ 0.43	$ 0.18	$ 0.39	$ 0.30	$ 0.40	$ 0.39	$ 0.27	$ 0.41	$ 1.30	$ 1.46

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS - (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Jul. 01, 2020
Derivative Financial Instruments
Asset Derivatives, Fair Value		$ 7,932,000
Liability Derivatives, Fair Value		7,932,000
Asset pledged
Derivative Financial Instruments
Available-for-sale securities pledged as collateral	$ 12,182,000
Interest rate swap agreements
Derivative Financial Instruments
Aggregate notional amount	135,740,000	$ 137,176,000
Asset Derivatives, Notional Amount	67,870,000
Asset Derivatives, Fair Value	6,566,000
Liability Derivatives, Fair Value	6,566,000
Liability Derivatives, Notional Amount	67,870,000
Derivatives not designated as hedging instruments | Interest rate swap agreements
Derivative Financial Instruments
Interest rate swap	0
Interest income	$ 698,000

FAIR VALUE MEASUREMENTS AND F_3

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Assets Measured at Fair Value (Details) - USD ($)	Dec. 31, 2020	Jul. 01, 2020	Dec. 31, 2019
Assets Measured at Fair Value
Total, fair value	$ 349,332,000		$ 346,723,000
Marketable equity security	1,000,000		979,000
Fair value derivative asset		$ 7,932,000
Fair value of the derivative liability		$ 7,932,000
Impaired loans with a valuation allowance	8,082,000		3,375,000
Valuation allowance	(925,000)		(1,051,000)
Impaired loans, net	8,082,000		3,375,000
Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	6,566,000
Fair value of the derivative liability	6,566,000
Obligations of the U.S. Treasury
Assets Measured at Fair Value
Total, fair value	12,182,000
Obligations of U.S. Government agencies
Assets Measured at Fair Value
Total, fair value	26,344,000		17,000,000
Obligations of U.S. Government agencies | Level 1
Assets Measured at Fair Value
Total, fair value	0
Obligations of U.S. Government agencies | Level 2
Assets Measured at Fair Value
Total, fair value	26,344,000
Obligations of U.S. Government agencies | Level 3
Assets Measured at Fair Value
Total, fair value	0
Obligations Of States And Political Subdivisions Tax Exempt
Assets Measured at Fair Value
Total, fair value	122,401,000		70,760,000
Obligations Of States And Political Subdivisions Taxable
Assets Measured at Fair Value
Total, fair value	47,452,000		36,303,000
Residential Passthrough Securities
Assets Measured at Fair Value
Total, fair value	38,176,000		59,210,000
Residential Collateralized Mortgage Obligations
Assets Measured at Fair Value
Total, fair value	57,467,000		114,723,000
Commercial Mortgage Backed Securities
Assets Measured at Fair Value
Total, fair value	45,310,000		48,727,000
Recurring fair value measurements
Assets Measured at Fair Value
Total, fair value	349,332,000		346,723,000
Marketable equity security	1,000,000		979,000
Servicing rights	1,689,000		1,277,000
Total asset fair value measurements	358,587,000		348,979,000
Recurring fair value measurements | Level 1
Assets Measured at Fair Value
Total, fair value	0		0
Marketable equity security	1,000,000		979,000
Servicing rights	0		0
Total asset fair value measurements	1,000,000		979,000
Recurring fair value measurements | Level 2
Assets Measured at Fair Value
Total, fair value	349,332,000		346,723,000
Marketable equity security	0		0
Servicing rights	0		0
Total asset fair value measurements	355,898,000		346,723,000
Recurring fair value measurements | Level 3
Assets Measured at Fair Value
Total, fair value	0		0
Marketable equity security	0		0
Servicing rights	1,689,000		1,277,000
Total asset fair value measurements	1,689,000		1,277,000
Recurring fair value measurements | Interest rate swap agreements
Assets Measured at Fair Value
Fair value derivative asset	6,566,000
Fair value of the derivative liability	6,566,000
Recurring fair value measurements | Interest rate swap agreements | Level 1
Assets Measured at Fair Value
Fair value derivative asset	0
Fair value of the derivative liability	0
Recurring fair value measurements | Interest rate swap agreements | Level 2
Assets Measured at Fair Value
Fair value derivative asset	6,566,000
Fair value of the derivative liability	6,566,000
Recurring fair value measurements | Interest rate swap agreements | Level 3
Assets Measured at Fair Value
Fair value derivative asset	0
Fair value of the derivative liability	0
Recurring fair value measurements | Obligations of the U.S. Treasury
Assets Measured at Fair Value
Total, fair value	12,182,000
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 1
Assets Measured at Fair Value
Total, fair value	0
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 2
Assets Measured at Fair Value
Total, fair value	12,182,000
Recurring fair value measurements | Obligations of the U.S. Treasury | Level 3
Assets Measured at Fair Value
Total, fair value	0
Recurring fair value measurements | Obligations of U.S. Government agencies
Assets Measured at Fair Value
Total, fair value			17,000,000
Recurring fair value measurements | Obligations of U.S. Government agencies | Level 1
Assets Measured at Fair Value
Total, fair value			0
Recurring fair value measurements | Obligations of U.S. Government agencies | Level 2
Assets Measured at Fair Value
Total, fair value			17,000,000
Recurring fair value measurements | Obligations of U.S. Government agencies | Level 3
Assets Measured at Fair Value
Total, fair value			0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt
Assets Measured at Fair Value
Total, fair value	122,401,000		70,760,000
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt | Level 1
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt | Level 2
Assets Measured at Fair Value
Total, fair value	122,401,000		70,760,000
Recurring fair value measurements | Obligations Of States And Political Subdivisions Tax Exempt | Level 3
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable
Assets Measured at Fair Value
Total, fair value	47,452,000		36,303,000
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable | Level 1
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable | Level 2
Assets Measured at Fair Value
Total, fair value	47,452,000		36,303,000
Recurring fair value measurements | Obligations Of States And Political Subdivisions Taxable | Level 3
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Residential Passthrough Securities
Assets Measured at Fair Value
Total, fair value	38,176,000		59,210,000
Recurring fair value measurements | Residential Passthrough Securities | Level 1
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Residential Passthrough Securities | Level 2
Assets Measured at Fair Value
Total, fair value	38,176,000		59,210,000
Recurring fair value measurements | Residential Passthrough Securities | Level 3
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Residential Collateralized Mortgage Obligations
Assets Measured at Fair Value
Total, fair value	57,467,000		114,723,000
Recurring fair value measurements | Residential Collateralized Mortgage Obligations | Level 1
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Residential Collateralized Mortgage Obligations | Level 2
Assets Measured at Fair Value
Total, fair value	57,467,000		114,723,000
Recurring fair value measurements | Residential Collateralized Mortgage Obligations | Level 3
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Commercial Mortgage Backed Securities
Assets Measured at Fair Value
Total, fair value	45,310,000		48,727,000
Recurring fair value measurements | Commercial Mortgage Backed Securities | Level 1
Assets Measured at Fair Value
Total, fair value	0		0
Recurring fair value measurements | Commercial Mortgage Backed Securities | Level 2
Assets Measured at Fair Value
Total, fair value	45,310,000		48,727,000
Recurring fair value measurements | Commercial Mortgage Backed Securities | Level 3
Assets Measured at Fair Value
Total, fair value	0		0
Nonrecurring fair value measurements
Assets Measured at Fair Value
Total asset fair value measurements	8,495,000		5,210,000
Impaired loans with a valuation allowance	8,082,000		3,375,000
Valuation allowance	(925,000)		(1,051,000)
Impaired loans, net	7,157,000		2,324,000
Foreclosed assets held for sale	1,338,000		2,886,000
Nonrecurring fair value measurements | Level 1
Assets Measured at Fair Value
Total asset fair value measurements	0		0
Impaired loans with a valuation allowance	0		0
Valuation allowance	0		0
Impaired loans, net	0		0
Foreclosed assets held for sale	0		0
Nonrecurring fair value measurements | Level 2
Assets Measured at Fair Value
Total asset fair value measurements	0		0
Impaired loans with a valuation allowance	0		0
Valuation allowance	0		0
Impaired loans, net	0		0
Foreclosed assets held for sale	0		0
Nonrecurring fair value measurements | Level 3
Assets Measured at Fair Value
Total asset fair value measurements	8,495,000		5,210,000
Impaired loans with a valuation allowance	8,082,000		3,375,000
Valuation allowance	(925,000)		(1,051,000)
Impaired loans, net	7,157,000		2,324,000
Foreclosed assets held for sale	$ 1,338,000		$ 2,886,000

FAIR VALUE MEASUREMENTS AND F_4

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Valuation Techniques Recurring (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Recurring fair value measurements
Valuation Techniques and the Unobservable Inputs
Fair value	$ 1,689,000	$ 1,277,000
Valuation Technique, Discounted cash flow | Servicing rights
Valuation Techniques and the Unobservable Inputs
Discount rate	13.00%	12.50%
Weighted-average PSA	277.00%	183.00%
Servicing fees of loan balances	0.25%	0.25%
Servicing fees of payments are late	4.00%	4.00%
Late fees assessed	5.00%	5.00%
Miscellaneous fees per account per month	$ 1.94	$ 1.94
Monthly servicing cost per account	6	6
Additional monthly servicing cost per loan on loans more than 30 days delinquent	$ 24	$ 24
Servicing costs of loans more than 30 days delinquent	1.50%	1.50%
Annual increase in servicing costs	3.00%	3.00%
Valuation Technique, Discounted cash flow | Recurring fair value measurements
Valuation Techniques and the Unobservable Inputs
Fair value	$ 1,689,000	$ 1,277,000

FAIR VALUE MEASUREMENTS AND F_5

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Reconciliation (Details) - Level 3 - Servicing rights - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of activity for Level 3 assets (servicing rights) measured at fair value on a recurring basis
Servicing rights balance, beginning of period	$ 1,277	$ 1,404
Originations of servicing rights	988	204
Unrealized losses included in earnings	(576)	(331)
Servicing rights balance, end of period	$ 1,689	$ 1,277

FAIR VALUE MEASUREMENTS AND F_6

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Valuation Techniques Nonrecurring (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	$ 8,082,000	$ 3,375,000
Related allowance	925,000	1,051,000
Nonrecurring fair value measurements
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	7,157,000	2,324,000
Related allowance	925,000	1,051,000
Foreclosed assets held for sale	1,338,000	2,886,000
Real estate loan
Valuation Techniques and the Unobservable Inputs
Related allowance	416,000	678,000
Residential mortgage
Valuation Techniques and the Unobservable Inputs
Foreclosed assets held for sale	80,000	292,000
Residential mortgage | Real estate loan
Valuation Techniques and the Unobservable Inputs
Related allowance	153,000	176,000
Commercial | Real estate loan
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	6,501,000	0
Related allowance	691,000	0
Commercial | Commercial and industrial
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	72,000	904,000
Related allowance	72,000	149,000
Commercial | Loans secured by farm land
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	0	478,000
Related allowance	0	48,000
Impaired Loans
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	8,082,000	3,375,000
Related allowance	925,000	1,051,000
Fair value	7,157,000	2,324,000
Impaired Loans | Valuation, Market Approach | Residential mortgage | Real estate loan
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	1,509,000	732,000
Related allowance	162,000	176,000
Fair value	$ 1,347,000	$ 556,000
Impaired Loans | Valuation, Market Approach | Residential mortgage | Real estate loan | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate	31.00%	30.00%
Impaired Loans | Valuation, Market Approach | Commercial | Real estate loan
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance		$ 478,000
Related allowance		48,000
Fair value		$ 430,000
Impaired Loans | Valuation, Market Approach | Commercial | Real estate loan | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate		46.00%
Impaired Loans | Valuation, Market Approach | Commercial | Commercial and industrial
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	$ 6,501,000	$ 106,000
Related allowance	691,000	89,000
Fair value	5,810,000	17,000
Impaired Loans | Valuation, Market Approach | Commercial | Commercial and industrial | Measurement Input Discount To Borrowers Financial Statement Value Member
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance	72,000	798,000
Related allowance	72,000	60,000
Fair value		$ 738,000
Fair value	$ 0
Impaired Loans | Valuation, Market Approach | Commercial | Commercial and industrial | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate	28.00%	69.00%
Impaired Loans | Valuation, Market Approach | Commercial | Commercial and industrial | Weighted average | Measurement Input Discount To Borrowers Financial Statement Value Member
Valuation Techniques and the Unobservable Inputs
Discount rate	100.00%	15.00%
Impaired Loans | Valuation, Market Approach | Commercial | Loans secured by farm land
Valuation Techniques and the Unobservable Inputs
Recorded investment - with allowance		$ 1,261,000
Related allowance		678,000
Fair value		$ 583,000
Impaired Loans | Valuation, Market Approach | Commercial | Loans secured by farm land | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate		47.00%
Foreclosed Assets Held For Sale
Valuation Techniques and the Unobservable Inputs
Foreclosed assets held for sale	$ 1,338,000	$ 2,886,000
Valuation allowance	0	0
Fair value	1,338,000	2,886,000
Foreclosed Assets Held For Sale | Valuation, Market Approach | Land Receivable
Valuation Techniques and the Unobservable Inputs
Foreclosed assets held for sale		70,000
Valuation allowance		0
Fair value		$ 70,000
Foreclosed Assets Held For Sale | Valuation, Market Approach | Land Receivable | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate		53.00%
Foreclosed Assets Held For Sale | Valuation, Market Approach | Commercial Real Estate Receivables
Valuation Techniques and the Unobservable Inputs
Foreclosed assets held for sale	1,258,000	$ 2,524,000
Valuation allowance	0	0
Fair value	$ 1,258,000	$ 2,524,000
Foreclosed Assets Held For Sale | Valuation, Market Approach | Commercial Real Estate Receivables | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate	44.00%	39.00%
Foreclosed Assets Held For Sale | Valuation, Market Approach | Residential mortgage
Valuation Techniques and the Unobservable Inputs
Foreclosed assets held for sale	$ 80,000	$ 292,000
Valuation allowance	0	0
Fair value	$ 80,000	$ 292,000
Foreclosed Assets Held For Sale | Valuation, Market Approach | Residential mortgage | Weighted average
Valuation Techniques and the Unobservable Inputs
Discount rate	36.00%	46.00%

FAIR VALUE MEASUREMENTS AND F_7

FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Financial Instruments Not Recorded at Fair Value (Details) - USD ($)	Dec. 31, 2020	Jul. 01, 2020	Dec. 31, 2019
Fair values, and carrying amounts financial instruments not recorded at fair value
Fair value derivative asset		$ 7,932,000
Interest rate swap agreements
Fair values, and carrying amounts financial instruments not recorded at fair value
Fair value derivative asset	$ 6,566,000
Reported value measurement | Level 1
Fair values, and carrying amounts financial instruments not recorded at fair value
Cash and cash equivalents	96,017,000		$ 31,122,000
Reported value measurement | Level 2
Fair values, and carrying amounts financial instruments not recorded at fair value
Certificates of deposit	5,840,000		4,080,000
Restricted equity securities (included in Other Assets)	9,970,000		10,321,000
Accrued interest receivable	8,293,000		5,001,000
Short-term borrowings	20,022,000		86,220,000
Long-term borrowings	54,608,000		52,127,000
Subordinated debt	16,553,000		6,500,000
Accrued interest payable	390,000		311,000
Reported value measurement | Level 2 | Deposits with no stated maturity
Fair values, and carrying amounts financial instruments not recorded at fair value
Deposits, fair value	1,430,062,000		877,965,000
Reported value measurement | Level 2 | Time deposits
Fair values, and carrying amounts financial instruments not recorded at fair value
Deposits, fair value	390,407,000		374,695,000
Reported value measurement | Level 2 | Interest rate swap agreements
Fair values, and carrying amounts financial instruments not recorded at fair value
Fair value derivative asset	6,566,000		0
Interest rate swap agreements	6,566,000		0
Reported value measurement | Level 3
Fair values, and carrying amounts financial instruments not recorded at fair value
Loans, net	1,632,824,000		1,172,386,000
Estimate of fair value measurement | Level 1
Fair values, and carrying amounts financial instruments not recorded at fair value
Cash and cash equivalents	96,017,000		31,122,000
Estimate of fair value measurement | Level 2
Fair values, and carrying amounts financial instruments not recorded at fair value
Certificates of deposit	6,054,000		4,227,000
Restricted equity securities (included in Other Assets)	9,970,000		10,321,000
Accrued interest receivable	8,293,000		5,001,000
Short-term borrowings	19,974,000		86,166,000
Long-term borrowings	55,723,000		52,040,000
Subordinated debt	16,680,000		6,499,000
Accrued interest payable	390,000		311,000
Estimate of fair value measurement | Level 2 | Deposits with no stated maturity
Fair values, and carrying amounts financial instruments not recorded at fair value
Deposits, fair value	1,430,062,000		877,965,000
Estimate of fair value measurement | Level 2 | Time deposits
Fair values, and carrying amounts financial instruments not recorded at fair value
Deposits, fair value	393,566,000		376,738,000
Estimate of fair value measurement | Level 2 | Interest rate swap agreements
Fair values, and carrying amounts financial instruments not recorded at fair value
Fair value derivative asset	6,566,000		0
Interest rate swap agreements	6,566,000		0
Estimate of fair value measurement | Level 3
Fair values, and carrying amounts financial instruments not recorded at fair value
Loans, net	$ 1,646,207,000		$ 1,181,000,000