Peoples Financial Services (PFIS) 10-K 16 Mar 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 28, 2021	Jun. 30, 2020
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2020
Entity File Number	001-36388
Entity Registrant Name	Peoples Financial Services Corp.
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Public Float			$ 280,041,771
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2391852
Entity Address, Address Line One	150 North Washington Avenue
Entity Address, City or Town	Scranton
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	18503
City Area Code	570
Local Phone Number	346-7741
Title of 12(b) Security	Common stock, $2.00 par value
Trading Symbol	PFIS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
ICFR Auditor Attestation Flag	true
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		7,203,101
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0001056943
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Cash and due from banks:
Cash and due from banks	$ 29,287	$ 26,943
Interest-bearing deposits in other banks	15,905	4,210
Federal funds sold	183,000
Total cash and due from banks	228,192	31,153
Investment securities:
Available-for-sale	295,911	330,478
Equity investments carried at fair value	138	423
Held-to-maturity: Fair value December 31, 2020, $7,513; December 31, 2019, $7,889	7,225	7,656
Total investment securities	303,274	338,557
Loans	2,177,982	1,938,240
Less: allowance for loan losses	27,344	22,677
Net loans	2,150,638	1,915,563
Loans held for sale	837	986
Premises and equipment, net	47,045	47,932
Accrued interest receivable	8,255	6,981
Goodwill	63,370	63,370
Intangible assets, net	960	1,565
Bank owned life insurance	42,316	35,041
Other assets	38,915	34,179
Total assets	2,883,802	2,475,327
Deposits:
Noninterest-bearing	622,475	463,238
Interest-bearing	1,814,638	1,508,251
Total deposits	2,437,113	1,971,489
Short-term borrowings	50,000	152,150
Long-term debt	14,769	32,733
Subordinated debentures	33,000
Accrued interest payable	736	1,277
Other liabilities	31,307	18,668
Total liabilities	2,566,925	2,176,317
Stockholders' equity:
Common stock, par value $2.00, authorized 25,000,000 shares, issued and outstanding 7,215,202 shares at December 31, 2020 and 7,388,480 shares at December 31, 2019	14,431	14,777
Capital surplus	129,274	135,251
Retained earnings	171,023	152,187
Accumulated other comprehensive income (loss)	2,149	(3,205)
Total stockholders' equity	316,877	299,010
Total liabilities and stockholders' equity	$ 2,883,802	$ 2,475,327

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position
Held-to-maturity, Fair value	$ 7,513	$ 7,889
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	7,215,202	7,388,480
Common stock, shares outstanding	7,215,202	7,388,480

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest and fees on loans:
Taxable	$ 83,683	$ 82,488	$ 74,352
Tax-exempt	3,736	4,309	3,666
Interest and dividends on investment securities:
Taxable	5,334	4,435	3,799
Tax-exempt	1,178	1,878	2,621
Dividends	97	84	72
Interest on interest-bearing deposits in other banks	31	65	151
Interest on federal funds sold	66	122
Total interest income	94,125	93,381	84,661
Interest expense:
Interest on deposits	11,739	14,995	9,346
Interest on short-term borrowings	848	1,642	2,738
Interest on long-term debt	702	1,231	1,238
Interest on subordinated debt	1,035
Total interest expense	14,324	17,868	13,322
Net interest income	79,801	75,513	71,339
Provision for loan losses	7,400	6,100	4,200
Net interest income after provision for loan losses	72,401	69,413	67,139
Noninterest income:
Mortgage banking income	1,595	600	627
Increase in cash surrender value of life insurance	774	755	757
Interest rate swap revenue	2,321	1,790	103
Net gains (losses) on equity investment securities	(6)	132	14
Net gains on sale of investment securities available-for-sale	918	23
Net gain on sale of credit card loans			291
Total noninterest income	16,642	15,120	13,659
Noninterest expense:
Salaries and employee benefits expense	30,135	31,374	28,407
Net occupancy and equipment expense	12,840	11,911	10,897
Amortization of intangible assets	606	730	881
Professional fees and outside services	2,091	1,758	2,414
FDIC insurance and assessments	873	651	1,093
Donations	1,357	1,441	1,339
Other expenses	6,966	7,777	7,456
Total noninterest expense	54,868	55,642	52,487
Income before income taxes	34,175	28,891	28,311
Income tax expense	4,821	3,155	3,391
Net income	29,354	25,736	24,920
Other comprehensive income :
Unrealized gain (loss) on investment securities available-for-sale	8,779	5,109	(2,014)
Reclassification adjustment for net gain on sales included in net income	(918)	(23)
Change in benefit plan liabilities	(1,398)	639	(591)
Change in derivative fair value	315	441	246
Other comprehensive income (loss)	6,778	6,166	(2,359)
Income tax expense (benefit)	1,424	1,295	(496)
Other comprehensive income (loss), net of income taxes	5,354	4,871	(1,863)
Comprehensive income	$ 34,708	$ 30,607	$ 23,648
Net income:
Basic	$ 4.02	$ 3.48	$ 3.37
Diluted	$ 4	$ 3.47	$ 3.37
Average common shares outstanding:
Basic	7,304,956	7,395,429	7,397,797
Diluted	7,337,843	7,412,369	7,402,900
Dividends declared	$ 1.44	$ 1.37	$ 1.31
Service charges, fees and commissions
Noninterest income:
Revenue from contracts with customers	$ 6,809	$ 7,236	$ 7,575
Merchant services income
Noninterest income:
Revenue from contracts with customers	824	973	809
Commission and fees on fiduciary activities
Noninterest income:
Revenue from contracts with customers	2,125	2,087	2,036
Wealth management income
Noninterest income:
Revenue from contracts with customers	$ 1,282	$ 1,524	$ 1,447

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Capital Surplus	Retained EarningsCumulative Effect, Adjustment Balance	Retained Earnings	Accumulated Other Comprehensive LossCumulative Effect, Adjusted Balance	Accumulated Other Comprehensive LossCumulative Effect, Adjustment Balance	Accumulated Other Comprehensive Loss	Cumulative Effect, Adjusted Balance	Total
Balance at Dec. 31, 2017	$ 14,793	$ 135,043	$ 2	$ 121,353		$ (2)	$ (6,213)		$ 264,976
Net income				24,920					24,920
Other comprehensive income (loss), net of income taxes					$ (1,861)			$ (1,861)	(1,863)
Dividends declared				(9,693)					(9,693)
Stock based compensation		272							272
Common stock grants awarded, net of unearned compensation	5	(5)
Balance at Dec. 31, 2018	14,798	135,310		136,582			(8,076)		278,614
Net income				25,736					25,736
Other comprehensive income (loss), net of income taxes							4,871		4,871
Dividends declared				(10,131)					(10,131)
Stock based compensation		554							554
Common stock grants awarded, net of unearned compensation	8	(8)
Share retirement	(29)	(605)							(634)
Balance at Dec. 31, 2019	14,777	135,251		152,187			(3,205)		299,010
Net income				29,354					29,354
Other comprehensive income (loss), net of income taxes							5,354		5,354
Dividends declared				(10,518)					(10,518)
Stock based compensation		570							570
Common stock grants awarded, net of unearned compensation	17	(17)
Share retirement	(363)	(6,530)							(6,893)
Balance at Dec. 31, 2020	$ 14,431	$ 129,274		$ 171,023			$ 2,149		$ 316,877

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity
Dividends declared (in dollars per share)	$ 1.44	$ 1.37	$ 1.31
Common stock grants awarded, net of unearned compensation	$ 520	$ 147	$ 92
Common stock grants awarded, net of unearned compensation (in shares)	8,506	3,854	2,548
Share retired, shares	181,417	14,428

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Cash flows from operating activities:
Net income	$ 29,354	$ 25,736	$ 24,920
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	2,900	3,083	2,333
Amortization of right-of-use lease asset	744	398
Amortization of deferred loan fees, net	(2,236)	(164)	525
Amortization of intangibles	606	730	881
Amortization of low income housing partnerships	569	476	465
Provision for loan losses	7,400	6,100	4,200
Net unrealized (gain) loss on equity investment securities	35	(132)	(14)
Net (gain) loss on sale of other real estate owned	39	9	(21)
Net gain on sale of equity securities	(29)
Gain from bank owned life insurance			(368)
Loans originated for sale	(43,780)	(15,901)	(13,194)
Proceeds from sale of loans originated for sale	44,832	15,753	12,650
Net gain on sale of loans originated for sale	(903)	(89)	(99)
Net amortization of investment securities	1,084	1,668	2,206
Net gain on sale of investment securities available-for-sale	(918)	(23)
Net gain on sale of credit card loans held for sale			(291)
Increase in cash surrender value of life insurance	(774)	(755)	(757)
Deferred income tax expense (benefit)	(1,779)	394	(681)
Stock based compensation	570	554	272
Net change in:
Accrued interest receivable	(1,274)	134	(179)
Other assets	(12,268)	(3,363)	816
Accrued interest payable	(541)	82	698
Other liabilities	13,549	2,389	(1,736)
Net cash provided by operating activities	37,180	37,079	32,626
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale	65,120	9,677
Proceeds from repayments of investment securities:
Available-for-sale	84,622	57,477	31,093
Held-to-maturity	427	697	898
Purchases of investment securities:
Available-for-sale	(107,196)	(124,501)	(32,709)
Net redemption of restricted equity securities	4,804	(2,739)	1,100
Proceeds from sale of student loan portfolio			5,103
Proceeds from sale of credit card loan portfolio			2,698
Net increase in lending activities	(241,307)	(119,998)	(141,277)
Purchase of investment in life insurance	(6,500)
Purchases of premises and equipment	(2,292)	(5,603)	(4,069)
Proceeds from the sale of premises and equipment	435		404
Proceeds from bank owned life insurance			672
Proceeds from sale of other real estate owned	647	269	1,281
Net cash used in investing activities	(201,240)	(184,721)	(134,806)
Cash flows from financing activities:
Net increase in deposits	465,624	96,467	156,004
Proceeds from long-term debt		16,000
Repayment of long-term debt	(17,964)	(21,173)	(11,828)
Net increase (decrease) in short-term borrowings	(102,150)	65,650	(37,175)
Retirement of common stock	(6,893)	(634)
Cash dividends paid	(10,518)	(10,131)	(9,693)
Net cash provided by financing activities	361,099	146,179	97,308
Net increase in cash and cash equivalents	197,039	(1,463)	(4,872)
Cash and cash equivalents at beginning of period	31,153	32,616	37,488
Cash and cash equivalents at end of period	228,192	31,153	32,616
Cash paid during the period for:
Interest	14,865	17,786	12,624
Income taxes	6,250	4,550	2,650
Noncash items:
Transfers of loans to other real estate	1,163	421	1,432
Origination of mortgage servicing rights	318	172	$ 141
Initial recognition of right-of-use assets	899	6,523
Initial recognition of lease liability	899	$ 6,523
Paycheck Protection Program Liquidity Facility
Cash flows from financing activities:
Proceeds from long-term debt	103,650
Repayment of long-term debt	(103,650)
Subordinated Debentures
Cash flows from financing activities:
Proceeds from long-term debt	$ 33,000

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2020
Summary of significant accounting policies
Summary of significant accounting policies	1. Summary of significant accounting policies: Nature of operations: Peoples Financial Services Corp., a bank holding company incorporated under the laws of Pennsylvania, provides a full range of financial services through its wholly-owned subsidiary, Peoples Security Bank and Trust Company (“Peoples Bank”), collectively, the “Company” or “Peoples”. The Company services its retail and commercial customers through Peoples Bank is a state-chartered bank and trust company under the jurisdiction of the Pennsylvania Department of Banking and Securities and the Federal Deposit Insurance Corporation. Peoples Bank’s primary product is loans to small and medium-sized businesses. Other lending products include one-to-four family residential mortgages and consumer loans. Peoples Bank primarily funds its loans by offering deposits to commercial enterprises and individuals. Deposit product offerings include checking accounts, savings accounts, money market accounts and certificates of deposits. The Company faces competition primarily from commercial banks, thrift institutions and credit unions within its market, many of which are larger in terms of assets and capital. In addition, mutual funds and security brokers compete for various types of deposits, and consumer, mortgage, leasing and insurance companies compete for various types of loans and leases. Principal methods of competing for banking and permitted nonbanking services include price, nature of product, quality of service and convenience of location. Peoples Financial Services Corp. and Peoples Bank are subject to regulations of certain federal and state regulatory agencies and undergo periodic examinations. Basis of presentation: The consolidated financial statements of the Company have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”), Regulation S-X and reporting practices applied in the banking industry. All significant intercompany balances and transactions have been eliminated in consolidation. The Company also presents herein condensed parent company only financial information regarding Peoples Financial Services Corp. (“Parent Company”). Prior period amounts are reclassified when necessary to conform with the current year’s presentation. Such reclassifications had no effect on financial position or results of operations. The Company has evaluated events and transactions occurring subsequent to the balance sheet date of December 31, 2020, for items that should potentially be recognized or disclosed in these consolidated financial statements. The evaluation was conducted through the date these consolidated financial statements were issued. Estimates: The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates that are particularly susceptible to material change in the near term relate to the determination of the allowance for loan losses, fair value of financial instruments, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, the valuation of deferred tax assets, the valuation of derivative instruments, determination of other-than-temporary impairment losses on securities and impairment of goodwill. Actual results could differ from those estimates. Investment securities: Investment securities are classified and accounted for as either held-to-maturity or available-for-sale securities based on management’s intent at the time of acquisition. Management is required to reassess the appropriateness of such classifications at each reporting date. The Company classifies debt securities as held-to maturity when management has the positive intent and ability to hold such securities to maturity. Held-to-maturity securities are stated at cost, adjusted for amortization of premium and accretion of discount. Investment securities are designated as available-for-sale when they are to be held for indefinite periods of time as management intends to use such securities to implement asset/liability strategies or to sell them in response to changes in interest rates, prepayment risk, liquidity requirements, or other circumstances identified by management. Available-for-sale securities are reported at fair value, with unrealized gains and losses, net of income taxes, excluded from earnings and reported in a separate component of stockholders’ equity. All marketable equity securities are accounted for at fair value with unrealized gains and losses reported in earnings. Estimated fair values for investment securities are based on quoted market prices from a national pricing service. Realized gains and losses are computed using the specific identification method and are included in noninterest income. Premiums on callable debt securities are amortized to the earliest call date from the maturity date. Premiums on non-callable securities are amortized and discounts are accreted using the interest method over the expected life of the security. Investment securities that are bought and held principally for the purpose of selling them in the near term, in order to generate profits from market appreciation, are classified as trading account securities. Transfers of securities between categories are recorded at fair value at the date of the transfer, with the accounting treatment of unrealized gains or losses determined by the category into which the security is transferred. Management evaluates each investment security to determine if a decline in fair value below its amortized cost is an other-than-temporary impairment (“OTTI”) at least quarterly, and more frequently when economic or market concerns warrant an evaluation. Factors considered in determining whether an other-than-temporary impairment was incurred include: (i) the length of time and the extent to which the fair value has been less than amortized cost; (ii) the financial condition and near-term prospects of the issuer; (iii) whether a decline in fair value is attributable to adverse conditions specifically related to the security or specific conditions in an industry or geographic area; (iv) the credit-worthiness of the issuer of the security; (v) whether dividend or interest payments have been reduced or have not been made; (vi) an adverse change in the remaining expected cash flows from the security such that the Company will not recover the amortized cost of the security; (vii) whether management intends to sell the security; and (viii) if it is more likely than not that management will be required to sell the security before recovery. If a decline is judged to be other-than-temporary, the individual security is written-down to fair value with the credit related component of the write-down included in earnings and the non-credit related component included in other comprehensive income or loss. The assessment of whether an other-than-temporary impairment exists involves a high degree of subjectivity and judgment and is based on information available to management at a point in time. Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Loans held for sale: Loans held for sale consist of one-to-four family residential mortgages originated and intended for sale in the secondary market. The loans are carried in aggregate at the lower of cost or estimated market value, based upon current delivery prices in the secondary mortgage market. Net unrealized losses are recognized through a valuation allowance by corresponding charges to income. Gains or losses on the sale of these loans are recognized in noninterest income at the time of sale using the specific identification method. Loan origination fees, net of certain direct loan origination costs, are included in net gains or losses upon the sale of the related mortgage loan. Loans, net: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of deferred fees or costs. Interest income is accrued on the principal amount outstanding. Loan origination fees, net of certain direct origination costs, are deferred and recognized over the contractual life of the related loan as an adjustment to yield using the effective interest method. Premiums and discounts on purchased loans are amortized as adjustments to interest income using the effective interest method. Delinquency fees are recognized in income at the time when they are paid by customer. Transfers of financial assets, which include loan participation sales, are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when: (i) the assets have been isolated from the Company; (ii) the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets and (iii) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. The loan portfolio is segmented into commercial and retail loans. Commercial loans consist of commercial, commercial real estate, municipal and other related tax free loans. Retail loans consist of residential real estate and other consumer loans. The Company makes commercial loans for real estate development and other business purposes required by the customer base. The Company’s credit policies establish advance rates against the different forms of collateral that can be pledged against various commercial loans. Typically, the majority of loans will be underwritten to a percentage of their underlying collateral values such as real estate values, equipment, eligible accounts receivable and inventory. Individual loan advance rates may be higher or lower depending upon the financial strength of the borrower and/or term of the loan. Generally, assets financed through commercial loans are used for the operations of the business. Repayment for these types of loans generally comes from the cash flow of the business or the ongoing conversion of assets. Commercial real estate loans include construction, mini-perm, or longer term loans financing commercial properties. Repayment of these loans are generally dependent upon either the ongoing business cash flow from an owner occupied property or the lease/rental income or sale of a non-owner occupied property. Commercial real estate loans typically require a loan to value of not greater than Loans secured by commercial real estate generally have larger balances and involve a greater degree of risk than one-to-four family residential mortgage loans. Of primary concern in commercial real estate lending is the borrower’s and any guarantor’s creditworthiness and the feasibility and cash flow potential of the financed project. Additional considerations include: location, market and geographic concentration risks, loan to value, strength of guarantors and quality of tenants. Payments on loans secured by income properties often depend on successful operation and management of the properties. As a result, repayment of such loans may be subject to a higher level of risk than residential real estate loans, which could be caused by unfavorable conditions in the real estate market or the economy. To effectively monitor loans on income properties, the Company requires borrowers and loan guarantors, if any, to provide annual financial statements on commercial real estate loans and rent rolls where applicable. In reaching a decision on whether to make a commercial real estate loan, the Company considers and reviews a cash flow analysis of the borrower and guarantor, when applicable. In addition, the Company evaluates business cash flows, if applicable, net operating income of the property, the borrower’s expertise, credit history and the value of the underlying property. The Company has generally required that the properties securing these real estate loans have debt service coverage ratios, which is net cash flow before debt service to debt service, of at least Commercial loans are generally made on the basis of a business entity or individual borrower’s ability to make repayment from business cash flows or individual borrowers’ employment and other income. Commercial business loans tend to have a slightly higher risk than commercial real estate loans because collateral usually consists of business assets versus real estate. Further, any collateral securing such loans may depreciate over time and could be difficult to appraise and liquidate. As a result, repayment of commercial business loans may depend substantially on the success of the business itself. Residential mortgages, including home equity loans, are secured by the borrower’s residential real estate in either a first or second lien position. Residential mortgages have varying loan rates depending on the financial condition of the borrower, loan to value ratio and term. Residential mortgages may have amortizations up to 30 years. Consumer loans include installment loans, car loans, and overdraft lines of credit. These loans are both secured and unsecured. Consumer loans may entail greater risk than do residential mortgage loans, particularly in the case of consumer loans that are unsecured. Repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment for the outstanding loan and a small remaining deficiency often does not warrant further substantial collection efforts against the borrower. Consumer loan collections depend on the borrower’s continuing financial stability, and therefore are likely to be adversely affected by various factors, including job loss, divorce, illness or personal bankruptcy. Furthermore, the application of various federal and state laws, including federal and state insolvency laws, may limit the amount that can be recovered on such loans. Off-balance sheet financial instruments: In the ordinary course of business, the Company has entered into off-balance sheet financial instruments consisting of commitments to extend credit, unused portions of lines of credit and standby letters of credit. These financial instruments are recorded in the consolidated financial statements when they are funded. Fees on commercial letters of credit and on unused available lines of credit are recorded as interest and fees on loans and are included in interest income when paid. The Company records an allowance for off-balance sheet credit losses, if deemed necessary, separately as a liability. Nonperforming assets: Nonperforming assets consist of nonperforming loans and other real estate owned. Nonperforming loans include nonaccrual loans, troubled debt restructured loans and accruing loans past due 90 days 90 days Troubled debt restructured loans are loans with original terms, interest rate, or both, that have been modified as a result of a deterioration in the borrower’s financial condition and a concession has been granted that the Company would not otherwise consider. Unless on nonaccrual, interest income on these loans is recognized when earned, using the interest method. The Company offers a variety of modifications to borrowers that would be considered concessions. The modification categories offered can generally fall within the following categories: ● Rate Modification — A modification in which the interest rate is changed to a below market rate. ● Term Modification — A modification in which the maturity date, timing of payments or frequency of payments is changed. ● Interest Only Modification — A modification in which the loan is converted to interest only payments for a period of time. ● Payment Modification — A modification in which the dollar amount of the payment is changed, other than an interest only modification described above. ● Combination Modification — Any other type of modification, including the use of multiple categories above. The Company segments loans into risk categories based on relevant information about the ability of borrowers to service their debt such as current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. Loans are individually analyzed for credit risk by classifying them within the Company’s internal risk rating system. The Company’s risk rating classifications are defined as follows: ● Pass — A loan to borrowers with acceptable credit quality and risk that is not adversely classified as Substandard, Doubtful, Loss nor designated as Special Mention. ● Special Mention — A loan that has potential weaknesses that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the institution’s credit position at some future date. Special Mention loans are not adversely classified since they do not expose the Company to sufficient risk to warrant adverse classification. ● Substandard — A loan that is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the bank will sustain some loss if the deficiencies are not corrected. ● Doubtful — A loan classified as Doubtful has all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make the collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. ● Loss — A loan classified as Loss is considered uncollectible and of such little value that its continuance as bankable loans is not warranted. This classification does not mean that the loan has absolutely no recovery or salvage value, but rather it is not practical or desirable to defer writing off this basically worthless asset even though partial recovery may be effected in the future. Other real estate owned is comprised of properties acquired through foreclosure proceedings or in-substance foreclosures. A loan is classified as in-substance foreclosure when the Company has taken possession of the collateral regardless of whether formal foreclosure proceedings take place. Other real estate owned is included in other assets and recorded at fair value less cost to sell at the time of acquisition, establishing a new cost basis. Any excess of the loan balance over the recorded value is charged to the allowance for loan losses. Subsequent declines in the recorded values of the properties prior to their disposal and costs to maintain the assets are included in other expenses. Any gain or loss realized upon disposal of other real estate owned is included in noninterest expense. Allowance for loan losses: The allowance for loan losses represents management’s estimate of losses inherent in the loan portfolio as of the balance sheet date. The allowance for loan losses account is maintained through a provision for loan losses charged to earnings. Loans, or portions of loans, determined to be confirmed losses are charged against the allowance account and subsequent recoveries, if any, are credited to the account. A loss is considered confirmed when information available at the financial statement date indicates the loan, or a portion thereof, is uncollectible. Nonaccrual, troubled debt restructured and loans deemed impaired at the time of acquisition are reviewed monthly to determine if carrying value reductions are warranted or if these classifications should be changed. Consumer loans are considered losses and charged-off when they are 120 days past due. Management evaluates the adequacy of the allowance for loan losses account quarterly. This assessment is based on past charge-off experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of 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. Regulators, in reviewing the loan portfolio as part of the scope of a regulatory examination, may require the Company to increase its allowance for loan losses or take other actions that would require the Company to increase its allowance for loan losses. The allowance for loan losses is maintained at a level believed to be adequate to absorb probable credit losses related to specifically identified loans, as well as probable incurred losses inherent in the remainder of the loan portfolio as of the balance sheet date. The allowance for loan losses consists of an allocated element and an unallocated element. The allocated element consists of a specific allowance for impaired loans individually evaluated and a formula portion for loss contingencies on those loans collectively evaluated. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. All amounts due according to the contractual terms means that both the contractual interest and principal payments of a loan will be collected as scheduled in the loan agreement. Factors considered by management in determining impairment include payment status, ability to pay and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The Company recognizes interest income on impaired loans, including the recording of cash receipts, for nonaccrual, restructured loans or accruing loans depending on the status of the impaired loan. Loans considered impaired are measured for impairment based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. If the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral, if the loan is collateral dependent, is less than the recorded investment in the loan, a specific allowance for the loan will be established. The formula portion of the allowance for loan losses relates to large pools of smaller-balance homogeneous loans and those identified loans considered not individually impaired having similar characteristics as these loan pools. Loss contingencies for each of the major loan pools are determined by applying a total loss factor to the current balance outstanding for each individual pool. The total loss factor is comprised of a historical loss factor using a loss migration method plus qualitative factors, which adjusts the historical loss factor for changes in trends, conditions and other relevant factors that may affect repayment of the loans in these pools as of the evaluation date. Loss migration involves determining the percentage of each pool that is expected to ultimately result in loss based on historical loss experience. The historical loss factor for each pool is a weighted average of the Company’s historical net charge-off ratio for the most recent rolling twelve quarters. Management adjusts these historical loss factors by qualitative factors that represents a number of environmental risks that may cause estimated credit losses associated with the current portfolio to differ from historical loss experience. These environmental risks include: (i) changes in lending policies and procedures including underwriting standards and collection, charge-off and recovery practices; (ii) changes in the composition and volume of the portfolio; (iii) changes in national, local and industry conditions, including the effects of such changes on the value of underlying collateral for collateral-dependent loans; (iv) changes in the volume and severity of classified loans, including past due, nonaccrual, troubled debt restructures and other loan modifications; (v) changes in the levels of, and trends in, charge-offs and recoveries; (vi) the existence and effect of any concentrations of credit and changes in the level of such concentrations; (vii) changes in the experience, ability and depth of lending management and other relevant staff; (viii) changes in the quality of the loan review system and the degree of oversight by the board of directors; and (ix) the effect of external factors such as competition, pandemics and legal and regulatory requirements on the level of estimated credit losses in the current loan portfolio. Each environmental risk factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. Adjustments to the factors are supported through documentation of changes in conditions in a narrative accompanying the allowance for loan loss calculation. Management believes the level of the allowance for loan losses was adequate to absorb probable credit losses inherent in the loan portfolio as of December 31, 2020. Revenue from Contracts with Customers: The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers” (“Topic 606”). Under Topic 606, the Company must identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the Company satisfies a performance obligation. Significant revenue has not been recognized in the current reporting period that results from performance obligations satisfied in previous periods. The Company’s primary sources of revenue are derived from interest and dividends earned on loans, investment securities, and other financial instruments that are not within the scope of Topic 606. The Company has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the consolidated statements of income was not necessary. The Company generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. The following is a discussion of revenues within the scope of the guidance: ● Service charges, fees, commissions and other . Service charges, fees and commissions on deposit accounts include fees for banking services provided, overdrafts and non-sufficient funds. Revenue is generally recognized in accordance with published deposit account agreements for retail accounts or contractual agreements for commercial accounts. The Company’s deposit services also include our ATM and debit card interchange revenue that is presented gross of the associated costs. Interchange revenue is generated by the Company’s deposit customers’ usage and volume of activity. Interchange rates are not controlled by the Company, which effectively acts as processor that collects and remits payments associated with customer debit card transactions. ● Commission and fees on fiduciary activities. Commission and fees on fiduciary activities includes fees and commissions from investment management, administrative and advisory services primarily for individuals, and to a lesser extent, partnerships and corporations. Revenue is recognized on an accrual basis at the time the services are performed and when the Company has a right to invoice and are based on either the market value of the assets managed or the services provided. ● Wealth management income. Wealth management income includes fees and commissions charged when the Company arranges for another party to transfer brokerage services to a customer. The fees and commissions under this agent relationship are based upon stated fee schedules based upon the type of transaction, volume, and value of the services provided. ● Merchant services income . Merchant services revenue is derived from a third party vendor that processes credit card transactions on behalf of the Company’s merchant customers. Merchant services revenue is primarily comprised of residual fee income based on the referred merchant’s processing volumes and/or margin. Premises and equipment, net: Land is stated at cost. Premises, equipment and leasehold improvements are stated at cost less accumulated depreciation and amortization. The cost of routine maintenance and repairs is expensed as incurred. The cost of major replacements, renewals and betterments is capitalized. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation and amortization are eliminated and any resulting gain or loss is reflected in noninterest income. Depreciation and amortization are computed principally using the straight-line method based on the following estimated useful lives of the related assets, or in the case of leasehold improvements, to the expected terms of the leases, if shorter: ​ ​ ​ ​ ​ Premises and leasehold improvements 7 ​ Furniture, fixtures and equipment 3 ​ ​ Goodwill and other intangible assets, net: The Company accounts for its acquisitions using the purchase accounting method. Purchase accounting requires the total purchase price to be allocated to the estimated fair values of assets acquired and liabilities assumed, including certain intangible assets that must be recognized. Typically, this allocation results in the purchase price exceeding the fair value of net assets acquired, which is recorded as goodwill. Core deposit intangibles are a measure of the value of checking, money market and savings deposits acquired in business combinations accounted for under the purchase method. Core deposit intangibles and other identified intangibles with finite useful lives are amortized using the sum of the year’s digits over their estimated useful lives of up to ten years. Goodwill and other intangible assets are tested for impairment annually or when circumstances arise indicating impairment may have occurred. In making this assessment that impairment has occurred, management considers a number of factors including, but not limited to, operating results, business plans, economic projections, anticipated future cash flows, and current market data. There are inherent uncertainties related to these factors and management’s judgment in applying them to the analysis of impairment. Changes in economic and operating conditions, as well as other factors, could result in impairment in future periods. Any impairment losses arising from such testing would be reported in the consolidated statements of income and comprehensive income as a separate line item within operations. There were no impairment losses recognized as a result of periodic impairment testing in each of the three-years ended December 31, 2020. Mortgage servicing rights: Mortgage servicing rights are recognized as a separate asset when acquired through sales of loan originations. The Company determines a

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	2. Cash and due from banks: On March 26, 2020, the Board of Governors of the Federal Reserve System eliminated the reserve requirement for all depository institutions. Prior to this date, the Company was required to maintain average reserve balances as established by the Federal Reserve Bank. The required reserve balance was $2,545 at December 31, 2019. ​

Investment securities

Investment securities	12 Months Ended
	Dec. 31, 2020
Investment securities
Investment securities	3. Investment securities: The amortized cost and fair value of investment securities aggregated by investment category at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair December 31, 2020 Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 18,478 ​ $ 427 ​ ​ ​ ​ $ 18,905 ​ U.S. government-sponsored enterprises ​ ​ 63,834 ​ ​ 1,354 ​ ​ ​ ​ ​ 65,188 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 53,297 ​ ​ 2,099 ​ $ 30 ​ 55,366 ​ Tax-exempt ​ 53,977 ​ 3,054 ​ ​ 37 ​ 56,994 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 3,553 ​ 154 ​ ​ ​ ​ 3,707 ​ U.S. government-sponsored enterprises ​ 79,457 ​ 1,930 ​ 136 ​ 81,251 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 12,619 ​ 881 ​ ​ ​ 13,500 ​ Corporate debt securities ​ ​ 1,000 ​ ​ ​ ​ ​ ​ ​ ​ 1,000 ​ Total ​ $ 286,215 ​ $ 9,899 ​ $ 203 ​ $ 295,911 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 6,849 ​ $ 275 ​ $ ​ ​ $ 7,124 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 21 ​ ​ ​ ​ ​ ​ 21 ​ U.S. government-sponsored enterprises ​ 355 ​ 13 ​ ​ ​ ​ 368 ​ Total ​ $ 7,225 ​ $ 288 ​ $ ​ ​ $ 7,513 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair December 31, 2019 Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 23,966 ​ $ 162 ​ ​ ​ ​ $ 24,128 ​ U.S. government-sponsored enterprises ​ ​ 87,156 ​ ​ 181 ​ $ 227 ​ 87,110 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 35,418 ​ 295 ​ 815 ​ 34,898 ​ Tax-exempt ​ 59,127 ​ 1,056 ​ 20 ​ 60,163 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 8,368 ​ 112 ​ 10 ​ 8,470 ​ U.S. government-sponsored enterprises ​ 101,914 ​ 1,011 ​ 77 ​ 102,848 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ ​ 12,694 ​ ​ 171 ​ ​ 4 ​ ​ 12,861 ​ Total ​ $ 328,643 ​ $ 2,988 ​ $ 1,153 ​ $ 330,478 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 6,852 ​ $ 208 ​ $ ​ ​ $ 7,060 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ 31 ​ ​ ​ ​ ​ ​ 31 ​ U.S. government-sponsored enterprises ​ 773 ​ 25 ​ ​ ​ ​ 798 ​ Total ​ $ 7,656 ​ $ 233 ​ $ ​ ​ $ 7,889 ​ ​ The Company had net unrealized gains on available-for-sale securities of $7,660, net of deferred income taxes of $2,036 at December 31, 2020, and net unrealized gains on available-for-sale securities of $1,450, net of deferred income taxes of $385, at December 31, 2019. During 2020, the Company sold a pool of low-yielding short-term municipal bonds and two mortgage-backed securities and received proceeds totaling $64,841 . Gross gains of were realized on the sale of investment securities in 2020. During 2019, the Company sold a pool of municipal bonds and received proceeds totaling At December 31, 2020, our equity security portfolio consisted of stock of one financial institution. During 2020, the Company sold its entire stock position in one other equity holding and received proceeds of $279 and recognized a gain of $29. At December 31, 2020 and December 31, 2019, we had $138 thousand and $423 thousand, respectively, in equity securities recorded at fair value. Prior to January 1, 2018, equity securities were stated at fair value with unrealized gains and losses reported as a separate component of Accumulated Other Comprehensive Income (“AOCI”), net of tax. At December 31, 2018, net unrealized gains of $3 thousand had been recognized in AOCI. On January 1, 2018, these unrealized gains, net of income tax were reclassified out of AOCI and into retained earnings with subsequent changes in fair value being recognized in net income. At December 31, 2020, the fair value of our equity portfolio was less than the cost basis by $15 thousand. The following is a summary of unrealized and realized gains and losses recognized in net income on equity securities during 2020 and 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 ​ 2019 Net gain (loss) recognized during the period on equity securities ​ $ (6) ​ $ 132 Less: Net gain (loss) recognized during the period on equity securities sold during the period ​ 29 ​ ​ Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date ​ $ (35) ​ $ 132 ​ The maturity distribution of the fair value, which is the net carrying amount, of the debt securities classified as available-for-sale at December 31, 2020, is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ Fair December 31, 2020 Value Within one year ​ $ 37,351 ​ After one but within five years ​ 49,444 ​ After five but within ten years ​ 22,799 ​ After ten years ​ 84,357 ​ ​ ​ 193,951 ​ Mortgage-backed and other amortizing securities ​ 101,960 ​ Total ​ $ 295,911 ​ ​ Expected maturities will differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties. ​ The maturity distribution of the amortized cost and fair value, of debt securities classified as held-to-maturity at December 31, 2020, is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair December 31, 2020 Cost Value Within one year ​ $ 175 ​ $ 178 ​ After five but within ten years ​ ​ 324 ​ ​ 344 ​ After ten years ​ ​ 6,350 ​ ​ 6,602 ​ ​ ​ 6,849 ​ 7,124 ​ Mortgage-backed securities ​ 376 ​ 389 ​ Total ​ $ 7,225 ​ $ 7,513 ​ ​ Securities with a carrying value of $165,982 and $157,047 at December 31, 2020 2019 Securities and short-term investment activities are conducted with a diverse group of government entities, corporations and state and local municipalities. The counterparty’s creditworthiness and type of collateral is evaluated on a case-by-case basis. At December 31, 2020 and 2019, there were no significant concentrations of credit risk from any one issuer, with the exception of U.S. government agencies and sponsored enterprises that exceeded 10.0 percent of stockholders’ equity. The fair value and gross unrealized losses of investment securities with unrealized losses for which an OTTI has not been recognized at December 31, 2020 and 2019, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position, are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized December 31, 2020 Value Losses Value Losses Value Losses State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ $ 9,246 ​ $ 30 ​ $ ​ ​ $ ​ ​ $ 9,246 ​ $ 30 ​ Tax-exempt ​ ​ 6,786 ​ ​ 37 ​ ​ ​ ​ ​ ​ ​ ​ 6,786 ​ ​ 37 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ ​ 11,553 ​ ​ 135 ​ ​ 284 ​ ​ 1 ​ ​ 11,837 ​ 136 ​ Total ​ $ 27,585 ​ $ 202 ​ $ 284 ​ $ 1 ​ $ 27,869 ​ $ 203 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized December 31, 2019 Value Losses Value Losses Value Losses U.S. government-sponsored enterprises ​ $ 13,695 ​ $ 149 ​ $ 36,070 ​ $ 78 ​ $ 49,765 ​ $ 227 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 23,929 ​ ​ 815 ​ ​ ​ ​ ​ ​ ​ 23,929 ​ 815 ​ Tax-exempt ​ 2,684 ​ 19 ​ ​ 1,098 ​ 1 ​ 3,782 ​ 20 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 992 ​ 1 ​ ​ 2,362 ​ ​ 9 ​ 3,354 ​ 10 ​ U.S. government-sponsored enterprises ​ 36,939 ​ ​ 51 ​ ​ 3,751 ​ ​ 30 ​ ​ 40,690 ​ ​ 81 ​ Total ​ $ 78,239 ​ $ 1,035 ​ $ 43,281 ​ $ 118 ​ $ 121,520 ​ $ 1,153 ​ ​ The Company had 26 investment securities, consisting of 12 tax-exempt and 8 taxable state and municipal obligations, and 6 mortgage-backed securities that were in unrealized loss positions at December 31, 2020. Of these securities, two mortgage-backed securities were in a continuous unrealized loss position for twelve months or more. Management does not consider the unrealized losses on the debt securities, as a result of changes in interest rates, to be OTTI based on historical evidence that indicates the cost of these securities is recoverable within a reasonable period of time in relation to normal cyclical changes in the market rates of interest. Moreover, because there has been no material change in the credit quality of the issuers or other events or circumstances that may cause a significant adverse impact on the fair value of these securities, and management does not intend to sell these securities and it is unlikely that the Company will be required to sell these securities before recovery of their amortized cost basis, which may be maturity, the Company does not consider the unrealized losses to be OTTI at December 31, 2020. There was no OTTI recognized for each of the years in the three-year period ended December 31, 2020. Other assets include the Company’s investment in Visa Class B stock. The Company’s ownership includes shares acquired at no cost related to the Company’s prior ownership in Visa's network while Visa operated as a cooperative. The Company holds shares of Visa Class A stock. There is a very limited market for this stock, as only current owners of Class B shares are permitted to transact in Class B. Due to the lack of orderly trades and public information of such trades, Visa Class B stock has no readily determinable fair value and is carried at cost.

Loans, net and allowance for lo

Loans, net and allowance for loan losses	12 Months Ended
	Dec. 31, 2020
Loans, net and allowance for loan losses
Loans, net and allowance for loan losses	4. Loans, net and allowance for loan losses: The major classifications of loans outstanding, net of deferred loan origination fees and costs at December 31, 2020 and 2019 are summarized as follows. Included in the commercial balances at December 31, 2020 are $189,699 of Paycheck Protection Program (“PPP”) loans. Net deferred loan fees of $2,058 were included in loan balances at December 31, 2020 and net deferred loan costs of $908 were included in the December 31, 2019 loan balances. The deferred loan fees in 2020 is a result of the origination of PPP loans. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Commercial ​ $ 679,286 ​ $ 522,957 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,137,990 ​ 1,011,423 ​ Residential ​ 277,414 ​ 301,378 ​ Consumer ​ 83,292 ​ 102,482 ​ Total ​ $ 2,177,982 ​ $ 1,938,240 ​ ​ Loans outstanding to directors, executive officers, principal stockholders or to their affiliates totaled $5,031 and $12,248 at December 31, 2020 and 2019, respectively. The decrease in loans outstanding is due to loan balances related to three former directors who retired in 2020. Advances and repayments during 2020 totaled $3,747 and $5,574, respectively, and during 2019 totaled $7,857 and $9,376, respectively. There were no related party loans that were classified as nonaccrual, past due, or restructured at December 31, 2020 and 2019. Deposits from related parties amounted to $9.0 million at December 31, 2020 and $12.9 million at December 31, 2019. At December 31, 2020, the majority of the Company’s loans were at least partially secured by real estate in our market region. Therefore, a primary concentration of credit risk is directly related to the real estate market in these regions. Changes in the general economy, local economy or in the real estate market could affect the ultimate collectability of this portion of the loan portfolio. Management does not believe there are any other significant concentrations of credit risk that could affect the loan portfolio. The changes in the allowance for loan losses account by major classification of loan for the year ended December 31, 2020, 2019, and 2018 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Commercial ​ Commercial ​ Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning balance ​ $ 6,888 ​ $ 11,496 ​ $ 3,226 ​ $ 1,067 ​ $ 22,677 ​ Charge-offs ​ (2,771) ​ (144) ​ (247) ​ (317) ​ (3,479) ​ Recoveries ​ 525 ​ 16 ​ 57 ​ 148 ​ 746 ​ Provisions ​ 4,092 ​ 3,191 ​ 93 ​ 24 ​ 7,400 ​ Ending balance ​ $ 8,734 ​ $ 14,559 ​ $ 3,129 ​ $ 922 ​ $ 27,344 ​ Ending balance: individually evaluated for impairment ​ 947 ​ 180 ​ 75 ​ ​ ​ 1,202 ​ Ending balance: collectively evaluated for impairment ​ $ 7,787 ​ $ 14,379 ​ $ 3,054 ​ $ 922 ​ $ 26,142 ​ Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 679,286 ​ $ 1,137,990 ​ $ 277,414 ​ $ 83,292 ​ $ 2,177,982 ​ Ending balance: individually evaluated for impairment ​ 4,297 ​ 3,952 ​ 1,546 ​ ​ 111 ​ 9,906 ​ Ending balance: collectively evaluated for impairment ​ $ 674,989 ​ $ 1,134,038 ​ $ 275,868 ​ $ 83,181 ​ $ 2,168,076 ​ ​ The allowance for loan losses increased $4.6 million to $27.3 million at December 31, 2020, from $22.7 million at the end of 2019. The increase resulted from a provision for loan losses of $7.4 million less net loans charged-off of $2.7 million. Changes made during the first six months of 2020 to the qualitative factors, which related to economic decline resulting from the adverse impact of the COVID-19 crisis, was the primary reason for the higher provision. Commercial loan charge-offs were $2.8 million and included a $1.1 million partial write down of a specific credit relationship, which has been subsequently paid off in January 2021 and $0.9 million related to a group of small business lines of credit in our Greater Delaware Valley market. Commercial loan recoveries increased $0.5 million and included $0.2 million related to the group of small business lines of credit in the Greater Delaware Valley market and $0.2 million on a separate credit. We charged-off $3.3 million of commercial loans in 2019 substantially all of which were in the fourth quarter. Included in this amount was $2.3 million related to certain small business lines of credit in our Greater Delaware Valley market and $1.0 million of other commercial loan relationships. In March 2020, we identified certain issues with a group of small business lines of credit, all of which had been originated by one of our lenders. All of these lines of credit were subject to credit review at origination and were considered satisfactory at such time. As a number of these lines of credit entered our annual renewal process, we identified changes in the credit quality of the borrowers which warranted action. We commenced a full review of this lender’s portfolio, as well as a review of other loans in our portfolio with similar characteristics. As a result of our review, we determined a number of the small business lines of credit originated by the particular lender to be impaired and collection doubtful at December 31, 2019. As such, we charged-off ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ December 31, 2019 ​ Commercial ​ Commercial ​ Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning balance ​ $ 5,516 ​ $ 10,736 ​ $ 3,892 ​ $ 1,235 ​ $ 21,379 Charge-offs ​ (3,314) ​ (817) ​ (477) ​ (459) ​ (5,067) Recoveries ​ 69 ​ 1 ​ 29 ​ 166 ​ 265 Provisions ​ 4,617 ​ 1,576 ​ (218) ​ 125 ​ 6,100 Ending balance ​ $ 6,888 ​ $ 11,496 ​ $ 3,226 ​ $ 1,067 ​ $ 22,677 Ending balance: individually evaluated for impairment ​ 363 ​ 279 ​ 135 ​ ​ ​ 777 Ending balance: collectively evaluated for impairment ​ $ 6,525 ​ $ 11,217 ​ $ 3,091 ​ $ 1,067 ​ $ 21,900 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 522,957 ​ $ 1,011,423 ​ $ 301,378 ​ $ 102,482 ​ $ 1,938,240 Ending balance: individually evaluated for impairment ​ 4,658 ​ 3,048 ​ 2,153 ​ ​ 261 ​ 10,120 Ending balance: collectively evaluated for impairment ​ $ 518,299 ​ $ 1,008,375 ​ $ 299,225 ​ $ 102,221 ​ $ 1,928,120 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2018 ​ Commercial ​ Commercial ​ Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ Beginning balance ​ $ 5,513 ​ $ 8,944 ​ $ 3,111 ​ $ 1,392 ​ $ 18,960 ​ Charge-offs ​ (154) ​ (1,250) ​ (405) ​ (545) ​ (2,354) ​ Recoveries ​ 137 ​ 136 ​ 98 ​ 202 ​ 573 ​ Provisions ​ 20 ​ 2,906 ​ 1,088 ​ 186 ​ 4,200 ​ Ending balance ​ $ 5,516 ​ $ 10,736 ​ $ 3,892 ​ $ 1,235 ​ $ 21,379 ​ Ending balance: individually evaluated for impairment ​ 50 ​ 403 ​ 666 ​ ​ 60 ​ 1,179 ​ Ending balance: collectively evaluated for impairment ​ $ 5,466 ​ $ 10,333 ​ $ 3,226 ​ $ 1,175 ​ $ 20,200 ​ Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 494,134 ​ $ 907,803 ​ $ 299,876 ​ $ 121,453 ​ $ 1,823,266 ​ Ending balance: individually evaluated for impairment ​ ​ 2,237 ​ ​ 3,121 ​ ​ 4,071 ​ ​ 212 ​ ​ 9,641 ​ Ending balance: collectively evaluated for impairment ​ $ 491,897 ​ $ 904,682 ​ $ 295,805 ​ $ 121,241 ​ $ 1,813,625 ​ The following tables present the major classification of loans summarized by the aggregate pass rating and the classified ratings of special mention, substandard and doubtful within the Company’s internal risk rating system at December 31, 2020 and 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 Pass Mention Substandard Doubtful Total Commercial ​ $ 660,559 ​ $ 14,305 ​ $ 4,422 ​ $ ​ ​ $ 679,286 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,107,699 ​ 17,517 ​ 12,774 ​ ​ ​ ​ 1,137,990 ​ Residential ​ 274,327 ​ 144 ​ 2,943 ​ ​ ​ ​ 277,414 ​ Consumer ​ 83,215 ​ ​ ​ 77 ​ ​ ​ ​ 83,292 ​ Total ​ $ 2,125,800 ​ $ 31,966 ​ $ 20,216 ​ $ ​ ​ $ 2,177,982 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 Pass Mention Substandard Doubtful Total Commercial ​ $ 513,994 ​ $ 3,837 ​ $ 5,126 ​ $ ​ ​ $ 522,957 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 993,645 ​ 2,508 ​ 15,270 ​ ​ ​ ​ 1,011,423 ​ Residential ​ 298,449 ​ 597 ​ 2,332 ​ ​ ​ ​ 301,378 ​ Consumer ​ 102,145 ​ ​ ​ 337 ​ ​ ​ ​ 102,482 ​ Total ​ $ 1,908,233 ​ $ 6,942 ​ $ 23,065 ​ $ ​ ​ $ 1,938,240 ​ The increase in commercial special mention loans from December 31, 2019 to December 31, 2020 is primarily associated with a credit relationship to a public entity totaling $13.0 million which is experiencing short-term cash flow issues. The increase in commercial real estate special mention loans is due to the reclassification of four large credits. Two commercial real estate credits totaling $9.0 million were downgraded to special mention due to the loss of major tenants, while another credit totaling $4.5 million is related to the hospitality industry and is experiencing financial difficulties due to COVID-19. The decrease to commercial real estate substandard loans resulted in part from the payoff of a $5.1 million commercial real estate construction loan that had experienced significant construction delays. Information concerning nonaccrual loans by major loan classification at December 31, 2020 and 2019 is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Commercial ​ $ 3,822 ​ $ 3,336 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,262 ​ 2,765 ​ Residential ​ 922 ​ 1,148 ​ Consumer ​ 111 ​ 261 ​ Total ​ $ 8,117 ​ $ 7,510 ​ The major classification of loans by past due status at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and December 31, 2020 ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 73 ​ ​ ​ ​ $ 3,822 ​ $ 3,895 ​ $ 675,391 ​ $ 679,286 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 344 ​ $ 134 ​ 3,262 ​ 3,740 ​ 1,134,250 ​ 1,137,990 ​ ​ ​ ​ Residential ​ 2,072 ​ 480 ​ ​ 993 ​ 3,545 ​ 273,869 ​ 277,414 ​ $ 71 ​ Consumer ​ 374 ​ 63 ​ 111 ​ 548 ​ 82,744 ​ 83,292 ​ ​ ​ Total ​ $ 2,863 ​ $ 677 ​ $ 8,188 ​ $ 11,728 ​ $ 2,166,254 ​ $ 2,177,982 ​ $ 71 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and December 31, 2019 ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 75 ​ ​ ​ ​ $ 3,036 ​ $ 3,111 ​ $ 519,846 ​ $ 522,957 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 926 ​ $ 175 ​ 2,765 ​ 3,866 ​ 1,007,557 ​ 1,011,423 ​ ​ ​ ​ Residential ​ 2,164 ​ 1,227 ​ 1,526 ​ 4,917 ​ 296,461 ​ 301,378 ​ $ 378 ​ Consumer ​ 523 ​ 123 ​ 261 ​ 907 ​ 101,575 ​ 102,482 ​ ​ ​ Total ​ $ 3,688 ​ $ 1,525 ​ $ 7,588 ​ $ 12,801 ​ $ 1,925,439 ​ $ 1,938,240 ​ $ 378 ​ The increase in the greater than 90 day category was due to a net increase in nonaccrual loans which are included in the category. Three large commercial loans added to non-accrual were partially offset by a partial charge-off of a non-accrual commercial relationship. The three loans added all have been individually measured for impairment. Two of the loans have specific reserves allocated, while the other credit was charged down to the SBA guaranteed amount. The following tables summarize information concerning impaired loans as of and for the years ended December 31, 2020, 2019 and 2018 by major loan classification: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income December 31, 2020 Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 2,251 ​ $ 3,421 ​ ​ ​ ​ $ 2,915 ​ $ 30 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,372 ​ 2,964 ​ ​ ​ ​ 2,148 ​ 28 ​ Residential ​ 1,086 ​ 1,263 ​ ​ ​ ​ 1,223 ​ 21 ​ Consumer ​ 111 ​ 121 ​ ​ ​ ​ 167 ​ ​ ​ ​ Total ​ 5,820 ​ 7,769 ​ ​ ​ ​ 6,453 ​ 79 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,046 ​ 2,094 ​ ​ 947 ​ 2,038 ​ 17 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,580 ​ 1,710 ​ 180 ​ 1,687 ​ 36 ​ Residential ​ 460 ​ 482 ​ 75 ​ 624 ​ 13 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 4,086 ​ 4,286 ​ 1,202 ​ 4,349 ​ 66 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,297 ​ 5,515 ​ 947 ​ 4,953 ​ 47 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,952 ​ 4,674 ​ 180 ​ 3,835 ​ 64 ​ Residential ​ 1,546 ​ 1,745 ​ 75 ​ 1,847 ​ 34 ​ Consumer ​ 111 ​ 121 ​ ​ ​ 167 ​ ​ ​ Total ​ $ 9,906 ​ $ 12,055 ​ $ 1,202 ​ $ 10,802 ​ $ 145 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income December 31, 2019 Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 3,638 ​ $ 4,175 ​ ​ ​ ​ $ 3,907 ​ $ 63 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,918 ​ 2,205 ​ ​ ​ ​ 2,385 ​ 38 ​ Residential ​ 1,718 ​ 2,060 ​ ​ ​ ​ 1,362 ​ 25 ​ Consumer ​ 261 ​ 274 ​ ​ ​ ​ 233 ​ ​ ​ ​ Total ​ 7,535 ​ 8,714 ​ ​ ​ ​ 7,887 ​ 126 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,020 ​ 1,038 ​ ​ 363 ​ 1,012 ​ 32 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,130 ​ 1,811 ​ 279 ​ 1,050 ​ 10 ​ Residential ​ 435 ​ 450 ​ 135 ​ 1,408 ​ 29 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ 20 ​ ​ ​ Total ​ 2,585 ​ 3,299 ​ 777 ​ 3,490 ​ 71 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,658 ​ 5,213 ​ 363 ​ 4,919 ​ 95 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,048 ​ 4,016 ​ 279 ​ 3,435 ​ 48 ​ Residential ​ 2,153 ​ 2,510 ​ 135 ​ 2,770 ​ 54 ​ Consumer ​ 261 ​ 274 ​ ​ ​ 253 ​ ​ ​ Total ​ $ 10,120 ​ $ 12,013 ​ $ 777 ​ $ 11,377 ​ $ 197 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income December 31, 2018 Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 1,562 ​ $ 1,900 ​ ​ ​ ​ $ 1,318 ​ $ 67 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,969 ​ 2,299 ​ ​ ​ ​ 2,822 ​ ​ 28 ​ Residential ​ 1,970 ​ 2,658 ​ ​ ​ ​ 2,193 ​ ​ 22 ​ Consumer ​ 152 ​ 160 ​ ​ ​ ​ 135 ​ ​ ​ ​ Total ​ 5,653 ​ 7,017 ​ ​ ​ ​ 6,468 ​ ​ 117 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 675 ​ 675 ​ $ 50 ​ 1,006 ​ ​ 30 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,152 ​ 1,323 ​ 403 ​ 1,676 ​ 18 ​ Residential ​ 2,101 ​ 2,328 ​ 666 ​ 1,585 ​ 22 ​ Consumer ​ ​ 60 ​ ​ 60 ​ ​ 60 ​ ​ 21 ​ ​ ​ ​ Total ​ 3,988 ​ 4,386 ​ 1,179 ​ 4,288 ​ 70 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,237 ​ 2,575 ​ 50 ​ 2,324 ​ 97 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,121 ​ 3,622 ​ 403 ​ 4,498 ​ 46 ​ Residential ​ 4,071 ​ 4,986 ​ 666 ​ 3,778 ​ 44 ​ Consumer ​ 212 ​ 220 ​ ​ 60 ​ 156 ​ ​ ​ ​ Total ​ $ 9,641 ​ $ 11,403 ​ $ 1,179 ​ $ 10,756 ​ $ 187 ​ There were no Included in the commercial loan, commercial real estate and residential real estate categories are troubled debt restructurings that were classified as impaired. Trouble debt restructurings totaled $2,818 and $2,193 at December 31, 2020 and 2019 respectively. There were four loans modified in 2020, one loan modified in 2019 and one loan modified in 2018 that resulted in troubled debt restructurings. The four loans modified in 2020 were adversely impacted by COVID-19 and the economic slowdown and did not qualify for the CARES Act exclusion due to current and prior delinquencies. Two of the loans were to one restaurant and two of the loans were to retail related small businesses. The following tables summarize the loans whose terms have been modified resulting in troubled debt restructurings during the year ended December 31, 2020 and 2019 and 2018. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification Post-Modification ​ ​ ​ ​ Number ​ Outstanding Recorded ​ Outstanding ​ Recorded December 31, 2020 ​ of Contracts ​ Investment ​ Recorded Investment ​ Investment Commercial ​ 1 ​ $ 12 ​ $ 12 ​ $ 5 ​ Commercial real estate 3 ​ ​ 1,073 ​ ​ 1,073 ​ ​ 1,046 ​ Total 4 ​ $ 1,085 ​ $ 1,085 ​ $ 1,051 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification Post-Modification ​ ​ ​ ​ Number ​ Outstanding Recorded ​ Outstanding ​ Recorded December 31, 2019 ​ of Contracts ​ Investment ​ Recorded Investment ​ Investment Commercial real estate 1 ​ $ 346 ​ $ 346 ​ $ 241 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification Post-Modification ​ ​ ​ ​ ​ Number ​ Outstanding Recorded ​ Outstanding ​ Recorded ​ December 31, 2018 ​ of Contracts ​ Investment ​ Recorded Investment ​ Investment ​ Commercial real estate 1 ​ $ 340 ​ $ 340 ​ $ 340 ​ ​ There were no payment defaults within 12 months of its modification on loans considered troubled debt restructurings for the years ended December 31, 2020, December 31, 2019 and December 31, 2018. ​ The amount of residential loans in the formal process of foreclosure totaled $135 at December 31, 2020 and $665 at December 31, 2019. ​ The Company received a significant number of requests to modify loan terms and/or defer principal and/or interest payments from borrowers affected by COVID-19, and has agreed to many such deferrals. The federal banking regulators issued guidance and encouraged banks to work prudently with, and provide short-term payment accommodations to borrowers affected by COVID-19. Section 4013 of the CARES Act includes a provision for the Company to opt out of applying the troubled debt restructuring (“TDR”) guidance for certain loan modifications and specified that such modifications made on loans that were current as of December 31, 2019 do not need to be classified as TDRs. Peoples has applied this guidance. The payment modifications granted included principal only payments and principal and interest deferrals and generally ranged from 90 to 180 days. The modified loans were not considered past due unless the modified payment was delinquent. Similarly, FASB has confirmed that short-term modifications made on a good-faith basis in response to COVID-19 to loan customers who were current prior to any relief are not TDRs. Beginning in March 2020, the Company began receiving requests for temporary modifications to the repayment structure for borrower loans. During 2020, the Company made a total of 479 commercial loan and 512 consumer loan temporary modifications with principal balances totaling $330,119. At December 31, 2020, 18 commercial loans and 26 consumer loans remain on deferral with principal balances of $6,084. The following tables provide information as of December 31, 2020 and the total during 2020 with respect to the Company’s payment deferrals granted in accordance with the CARES Act on commercial loans by North American Industry Classification System (“NAICS”) categories: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Percentage ​ ​ Percentage ​ ​ ​ Number ​ ​ ​ ​ of Total ​ ​ of Tier 1 ​ ​ ​ of ​ ​ ​ ​ Loan ​ ​ Capital ​ December 31, 2020 NAICS category ​ Loans ​ ​ Balance ​ Portfolio ​ ​ (Bank) ​ Lessors of Residential Buildings and Dwellings ​ 3 ​ $ 143 ​ ​ ​ ​ 0.1 % Full-Service Restaurants ​ 3 ​ ​ 1,961 ​ 0.1 % ​ 0.8 ​ General Automotive Repair ​ 1 ​ ​ 1,459 ​ 0.1 ​ ​ 0.6 ​ School and Employee Bus Transportation ​ 1 ​ ​ 725 ​ ​ ​ ​ 0.3 ​ All Others ​ 10 ​ ​ 1,508 ​ 0.1 ​ ​ 0.6 ​ ​ ​ 18 ​ $ 5,796 ​ 0.3 % ​ 2.3 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Percentage ​ ​ Percentage ​ ​ ​ Number ​ ​ ​ ​ of Total ​ ​ of Tier 1 ​ ​ ​ of ​ ​ ​ ​ Loan ​ ​ Capital ​ 2020 NAICS category ​ Loans ​ ​ Balance ​ Portfolio ​ ​ (Bank) ​ Lessors of Nonresidential Buildings ​ 65 ​ $ 71,899 ​ 3.3 % ​ 26.9 % Lessors of Residential Buildings and Dwellings ​ 64 ​ ​ 53,564 ​ 2.5 ​ ​ 19.9 ​ Hotels and Motels ​ 27 ​ ​ 39,261 ​ 1.8 ​ ​ 14.5 ​ Full-Service Restaurants ​ 33 ​ ​ 27,783 ​ 1.3 ​ ​ 10.3 ​ Limited-Service Restaurants ​ 8 ​ ​ 11,829 ​ 0.5 ​ ​ 4.4 ​ Gasoline Stations with Convenience Stores ​ 18 ​ ​ 12,422 ​ 0.6 ​ ​ 4.6 ​ Construction and Mining ​ 13 ​ ​ 9,718 ​ 0.4 ​ ​ 3.6 ​ Assisted Living Facilities for the Elderly ​ 2 ​ ​ 6,319 ​ 0.3 ​ ​ 2.3 ​ Colleges, Universities, and Professional Schools ​ 1 ​ ​ 6,301 ​ 0.3 ​ ​ 2.3 ​ All Others ​ 248 ​ ​ 67,674 ​ 3.1 ​ ​ 24.9 ​ ​ ​ 479 ​ $ 306,770 ​ 14.1 % ​ 113.7 % ​

Off-balance sheet financial ins

Off-balance sheet financial instruments	12 Months Ended
	Dec. 31, 2020
Off-balance sheet financial instruments.
Off-balance sheet financial instruments	5. Off-balance sheet financial instruments: The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, unused portions of lines of credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets. The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit, unused portions of lines of credit and standby letters of credit is represented by the contractual amounts of those instruments. The Company follows the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The Company records a valuation allowance for off-balance sheet credit losses, if deemed necessary, separately as a liability. The allowance is not significant. The contractual amounts of off-balance sheet commitments at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 Commitments to extend credit ​ $ 336,667 ​ $ 290,517 ​ Unused portions of lines of credit ​ 55,391 ​ 52,168 ​ Standby letters of credit ​ 34,428 ​ 45,018 ​ ​ ​ $ 426,486 ​ $ 387,703 ​ ​ Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company evaluates each customer’s credit worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation. Collateral held varies but may include personal or commercial real estate, accounts receivable, inventory and equipment. Unused portions of lines of credit, including home equity and overdraft protection agreements, are commitments for possible future extensions of credit to existing customers. Unused portions of home equity lines are collateralized and generally have fixed expiration dates. Overdraft protection agreements are uncollateralized and usually do not carry specific maturity dates. Unused portions of lines of credit ultimately may not be drawn upon to the total extent to which the Company is committed. ​ Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Generally, all standby letters of credit expire within twelve months. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending other loan commitments. The Company requires collateral supporting these standby letters of credit as deemed necessary. Collateral supporting standby letters of credit amounted to $4,902 at December 31, 2020 and $31,893 at December 31, 2019. The carrying value of the liability for the Company’s obligations under guarantees for standby letters of credit was not material at December 31, 2020 and 2019.

Premises and equipment, net

Premises and equipment, net	12 Months Ended
	Dec. 31, 2020
Premises and equipment, net
Premises and equipment, net	6. Premises and equipment, net: Premises and equipment at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 Land ​ $ 5,217 ​ $ 5,535 ​ Premises and leasehold improvements ​ 48,596 ​ 47,705 ​ Right-of-use assets ​ ​ 6,282 ​ ​ 6,125 ​ Furniture, fixtures and equipment ​ 18,395 ​ 17,422 ​ ​ ​ 78,490 ​ 76,787 ​ Less: accumulated depreciation ​ 31,445 ​ 28,855 ​ ​ ​ $ 47,045 ​ $ 47,932 ​ ​

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	7. Operating lease commitments and contingencies: The Company is obligated under non-cancelable operating leases for certain branch locations. We determine if an arrangement is a lease at inception by assessing whether a contract contains a right to control an identified asset for a period of time in exchange for consideration. For all leases, we recognize a right-of-use asset and lease liability at the effective date of the lease. Operating leases right-of-use assets are included in premises and equipment, and lease liabilities are included in other liabilities in the consolidated balance sheet commencing at January 1, 2019. We have no finance 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 generally containing one or more five-year renewal options. At December 31, 2020, the Company’s leases have remaining renewal terms that can extend the lease term from three years to twenty-one years that are reasonably certain of being exercised. The weighted average remaining lease term at December 31, 2020 is thirteen years . At December 31, 2019, the weighted average remaining lease term was At December 31, 2020, right-of-use assets of $6,282 were included in premises and equipment, and the related lease liability totaled $6,425 and was included in other liabilities in the consolidated balance sheet. Right-of-use assets and the related lease liability were $6,125 and $6,194, respectively, at December 31, 2019. The lease liability decreased due to payments of $660 offset by $326 of lease expense and the termination of two leases. One additional lease was entered into and added $899 to the liability. Rent expense for the years ended December 31, 2020, 2019 and 2018 amounted to Future minimum lease payments under operating leases are summarized as follows: ​ ​ ​ ​ ​ ​ 2021 $ 611 ​ 2022 ​ 618 ​ 2023 ​ 560 ​ 2024 ​ 488 ​ 2025 ​ 504 ​ Thereafter ​ 5,500 ​ Total future minimum lease payments ​ ​ 8,281 ​ Less amount representing interest ​ ​ (1,856) ​ Present value of future minimum lease payments ​ $ 6,425 ​ ​

Intangible assets, net

Intangible assets, net	12 Months Ended
	Dec. 31, 2020
Intangible assets, net
Intangible assets, net	8. Intangible assets, net: The gross carrying amount of core deposit intangible assets totaled $8,146 at December 31, 2020 and 2019. The gross carrying amount of trade name intangible assets totaled $203 at December 31, 2020 and 2019. The gross carrying amount of the intangible asset related to the acquisition of an asset management and retirement plan services company acquired in 2015 totaled $1,091 at December 31, 2020 and 2019. The accumulated amortization on core deposit intangible assets was $7,507 and $7,071 at December 31, 2020 and 2019, respectively. The accumulated amortization trade name intangible assets was $182 and $168 at December 31, 2020 and 2019, respectively. The accumulated amortization on the asset management and retirement plan services intangible asset was $792 and $636 at December 31, 2020 and 2019, respectively. The estimated amortization expense on intangible assets in years subsequent to December 31, 2020, is as follows: ​ ​ ​ ​ ​ ​ 2021 $ 491 ​ 2022 ​ 363 ​ 2023 ​ 106 ​ Total ​ $ 960 ​ ​

Other assets

Other assets	12 Months Ended
	Dec. 31, 2020
Other assets
Other assets	9. Other assets: The major components of other assets at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Other real estate owned ​ $ 864 ​ $ 450 ​ Investment in low income housing partnership ​ 6,332 ​ 6,901 ​ Mortgage servicing rights ​ 838 ​ 738 ​ Restricted equity securities (FHLB and other) ​ 5,397 ​ 10,201 ​ Net deferred tax asset ​ ​ 3,768 ​ ​ 3,362 ​ Interest rate floor ​ ​ 1,678 ​ ​ 944 ​ Interest rate swaps ​ ​ 13,693 ​ ​ 4,728 ​ Other assets ​ 6,345 ​ 6,855 ​ Total ​ $ 38,915 ​ $ 34,179 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The Company originates one-to-four family residential mortgage loans for sale in the secondary market with servicing rights retained. Mortgage loans serviced for others are not included in the accompanying Consolidated Balance Sheets. The unpaid principal balances of mortgage loans serviced for others were $166,472 at December 31, 2020 and $159,587 at December 31, 2019.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2020
Deposits.
Deposits	10. Deposits: The major components of interest-bearing and noninterest-bearing deposits at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ At the period end December 31, 2020 December 31, 2019 Interest-bearing deposits: ​ ​ ​ ​ ​ ​ ​ Money market accounts ​ $ 496,634 ​ $ 365,463 ​ Now accounts ​ 567,087 ​ 402,999 ​ Savings accounts ​ 431,224 ​ 370,270 ​ Time deposits less than $250 ​ 221,446 ​ 231,450 ​ Time deposits $250 or more ​ 98,247 ​ 138,069 ​ Total interest-bearing deposits ​ 1,814,638 ​ 1,508,251 ​ Noninterest-bearing deposits ​ 622,475 ​ 463,238 ​ Total deposits ​ $ 2,437,113 ​ $ 1,971,489 ​ ​ The growth in deposits occurred in non-maturity deposits as demand for liquid accounts elevated due to low interest rates and economic uncertainty. Strong organic growth of core deposits from new and existing relationships, inflows of public fund deposits, and proceeds of PPP loans retained on deposit by our commercial borrowers, primarily in the second quarter, contributed to the increase. Time deposits $250 thousand or more decreased due to the maturity of a few large public fund certificates of deposit. The aggregate amounts of maturities for all time deposits at December 31, 2020, are summarized as follows: ​ ​ ​ ​ ​ ​ 2021 $ 223,247 ​ 2022 ​ 40,093 ​ 2023 ​ 22,905 ​ 2024 ​ 15,099 ​ 2025 ​ 7,316 ​ Thereafter ​ 11,033 ​ ​ ​ $ 319,693 ​ ​ The aggregate amount of deposits reclassified as loans was $245 at December 31, 2020, and $343 at December 31, 2019. Management evaluates transaction accounts that are overdrawn for collectability as part of its evaluation for credit losses.

Short-term borrowings

Short-term borrowings	12 Months Ended
	Dec. 31, 2020
Short-term borrowings
Short-term borrowings	11. Short-term borrowings: Short-term borrowings consisted of FHLB advances representing overnight borrowings or borrowings with original terms of less than twelve months at December 31, 2020, 2019 and 2018: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Weighted ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Average ​ Rate at ​ Balance Balance Balance Rate December 31,2020 FHLB advances ​ $ 50,000 ​ $ 83,716 ​ $ 179,199 1.01 % 0.40 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End ​ Balance Balance Balance the Year of the Year FHLB advances ​ $ 152,150 ​ $ 62,941 ​ $ 152,150 2.61 % 1.84 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End ​ Balance Balance Balance the Year of the Year FHLB advances ​ $ 86,500 ​ $ 133,834 ​ $ 189,275 2.05 % 2.62 % ​ The Company has an agreement with the FHLB which allows for borrowings up to its maximum borrowing capacity based on a percentage of qualifying collateral assets. At December 31, 2020, the maximum borrowing capacity was $807,042 of which $64,769 was outstanding in borrowings and $218,350 was used to issue standby letters of credit to collateralize public fund deposits. Advances with the FHLB are secured under terms of a blanket collateral agreement by a pledge of FHLB stock and certain other qualifying collateral, such as investments and mortgage-backed securities and mortgage loans. Interest accrues daily on the FHLB advances based on rates of the FHLB discount notes. This rate resets each day. The Company also has unsecured line of credit agreements with two correspondent banks, where the total line amount was $18,000 at December 31, 2020 and 2019. There were amounts outstanding on either line of credit at December 31, 2020 or 2019. Interest on these borrowings accrues daily based on the daily federal funds rate.

Long-term debt

Long-term debt	12 Months Ended
	Dec. 31, 2020
Long-term debt.
Long-term debt	12. Long-term debt: Long-term debt consisting of advances from the FHLB at December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ Due ​ Fixed ​ ​ ​ December 31, 2020 ​ ​ December 31, 2019 June 2020 1.74 % ​ ​ ​ ​ $ 5,000 ​ June 2020 ​ 2.22 ​ ​ ​ ​ 6,000 ​ December 2020 ​ 1.84 ​ ​ $ ​ ​ 5,000 ​ June 2021 ​ 1.99 ​ ​ ​ 10,000 ​ ​ 10,000 ​ March 2023 ​ 4.69 ​ ​ ​ 4,769 ​ ​ 6,733 ​ ​ ​ ​ ​ ​ $ 14,769 ​ $ 32,733 ​ ​ Maturities of long-term debt, by contractual maturity, in years subsequent to December 31, 2020 are as follows: ​ ​ ​ ​ ​ ​ 2021 $ 12,058 ​ 2022 ​ 2,156 ​ 2023 ​ 555 ​ ​ ​ $ 14,769 ​ ​ None of the advances from the FHLB are convertible. At December 31, 2020, long-term debt are all at fixed rates. There were one During 2020, the company participated in the Federal Reserve Banks PPPLF by pledging PPP loans as collateral. Borrowings from this facility are categorized as long-term based on the twenty four

Subordinated debt

Subordinated debt	12 Months Ended
	Dec. 31, 2020
Subordinated debt
Subordinated debt	13. Subordinated debt: On June 1, 2020, the Company sold $33,000 aggregate principal amount of Subordinated Notes due 2030 (the “2020 Notes”) to accredited investors. The 2020 Notes qualify as Tier 2 capital for regulatory capital purposes. The 2020 Notes bear interest at a rate of 5.375% per year for the first five years and then float based on a benchmark rate (as defined), provided that the interest rate applicable to the outstanding principal balance during the period the 2020 Notes are floating will at no time be less the 4.75%. Interest will be payable semi-annually in arrears on June 1 and December 1 of each year, beginning on June 1, 2020, for the first five years after issuance and will be payable quarterly in arrears thereafter on March 1, June 1, September 1, and December 1. The 2020 Notes will mature on June 1, 2030 and are redeemable in whole or in part, without premium or penalty, at any time on or after June 1, 2025 and prior to June 1, 2030. Additionally, if all or any portion of the 2020 Notes cease to be deemed Tier 2 Capital, the Company may redeem, in whole and not in part, at any time upon giving not less than ten days’ notice, an amount equal to one hundred percent (100%) of the principal amount outstanding plus accrued but unpaid interest to but excluding the date fixed for redemption. Holders of the 2020 Notes may not accelerate the maturity of the 2020 Notes, except upon the bankruptcy, insolvency, liquidation, receivership or similar proceeding by or against the Company. ​

Fair value of financial instrum

Fair value of financial instruments	12 Months Ended
	Dec. 31, 2020
Fair value of financial instruments
Fair value of financial instruments	14. Fair value of financial instruments: Assets and liabilities measured at fair value on a recurring basis at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2020 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 18,905 $ 18,905 ​ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 65,188 ​ ​ ​ ​ $ 65,188 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 55,366 ​ ​ ​ ​ 55,366 ​ ​ ​ ​ Tax-exempt ​ 56,994 ​ ​ ​ ​ 56,994 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 3,707 ​ ​ ​ ​ 3,707 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 94,751 ​ ​ ​ ​ 94,751 ​ ​ ​ ​ Corporate debt securities ​ ​ 1,000 ​ ​ ​ ​ ​ 1,000 ​ ​ ​ ​ Common equity securities ​ ​ 138 ​ ​ 138 ​ ​ ​ ​ ​ ​ ​ Loan held for sale ​ ​ 837 ​ ​ ​ ​ ​ 837 ​ ​ ​ ​ Interest rate floor-other assets ​ ​ 1,678 ​ ​ ​ ​ ​ 1,678 ​ ​ ​ ​ Interest rate swap-other assets ​ ​ 13,693 ​ ​ ​ ​ ​ 13,693 ​ ​ ​ ​ Interest rate swap-other liabilities ​ ​ (14,099) ​ ​ ​ ​ ​ (14,099) ​ ​ ​ ​ Total ​ $ 298,158 ​ $ 19,043 ​ $ 279,115 ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2019 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 24,128 $ 24,128 ​ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 87,110 ​ ​ ​ ​ $ 87,110 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 34,898 ​ ​ ​ ​ 34,898 ​ ​ ​ ​ Tax-exempt ​ 60,163 ​ ​ ​ ​ 60,163 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 8,470 ​ ​ ​ ​ 8,470 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 115,709 ​ ​ ​ ​ 115,709 ​ ​ ​ ​ Common equity securities ​ 423 ​ ​ 423 ​ ​ ​ ​ ​ ​ ​ Loan held for sale ​ ​ 986 ​ ​ ​ ​ ​ 986 ​ ​ ​ ​ Interest rate floor-other assets ​ ​ 944 ​ ​ ​ ​ ​ 944 ​ ​ ​ ​ Interest rate swap-other assets ​ ​ 4,728 ​ ​ ​ ​ ​ 4,728 ​ ​ ​ ​ Interest rate swap-other liabilities ​ ​ (4,680) ​ ​ ​ ​ ​ (4,680) ​ ​ ​ ​ Total ​ $ 332,879 ​ $ 24,551 ​ $ 308,328 ​ $ ​ ​ ​ Assets and liabilities measured at fair value on a nonrecurring basis at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2020 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 2,884 ​ ​ ​ ​ $ 2,884 ​ Other real estate owned ​ $ 527 ​ ​ ​ ​ ​ ​ ​ $ 527 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant Other ​ Significant ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2019 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 1,808 ​ ​ ​ ​ $ 1,808 ​ Other real estate owned ​ $ 283 ​ ​ ​ ​ ​ ​ ​ $ 283 ​ ​ The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level 3 inputs to determine fair value: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements ​ ​ Fair Value ​ ​ ​ ​ ​ Range December 31, 2020 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 2,884 Appraisal of collateral Appraisal adjustments 9.0% to 97.0% (28.2)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.5)% ​ Other real estate owned ​ $ 527 Appraisal of collateral Appraisal adjustments 3.1% to 58.1% (29.9)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.0)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements ​ ​ Fair Value ​ ​ ​ ​ ​ Range December 31, 2019 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 1,808 Appraisal of collateral Appraisal adjustments 8.6% to 97.0% (54.4)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.2)% ​ Other real estate owned ​ $ 283 Appraisal of collateral Appraisal adjustments 20.0% to 63.6% (43.7)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.0)% ​ ​ Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal. The carrying and fair values of the Company’s financial instruments at December 31, 2020 and 2019 and their placement within the fair value hierarchy are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable ​ ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs December 31, 2020 Value Value (level 1) (level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 228,192 ​ $ 228,192 ​ $ 228,192 ​ ​ ​ ​ ​ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 295,911 ​ 295,911 ​ ​ 18,905 ​ $ 277,006 ​ ​ ​ ​ Common equity securities ​ ​ 138 ​ ​ 138 ​ ​ 138 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 7,225 ​ 7,513 ​ ​ ​ ​ 7,513 ​ ​ ​ ​ Loans held for sale ​ 837 ​ 837 ​ ​ ​ ​ 837 ​ ​ ​ ​ Net loans ​ 2,150,638 ​ 2,145,752 ​ ​ ​ ​ ​ ​ ​ $ 2,145,752 ​ Accrued interest receivable ​ 8,255 ​ 8,255 ​ ​ ​ ​ 8,255 ​ ​ ​ ​ Mortgage servicing rights ​ 838 ​ 1,269 ​ ​ ​ ​ 1,269 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ ​ 5,397 ​ 5,397 ​ ​ ​ ​ 5,397 ​ ​ ​ ​ Interest rate floor ​ ​ 1,678 ​ ​ 1,678 ​ ​ ​ ​ ​ 1,678 ​ ​ ​ ​ Interest rate swaps ​ 13,693 ​ 13,693 ​ ​ ​ ​ 13,693 ​ ​ ​ ​ Total ​ $ 2,712,802 ​ $ 2,708,635 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 2,437,113 ​ $ 2,441,014 ​ ​ ​ ​ $ 2,441,014 ​ ​ ​ ​ Long-term debt ​ 14,769 ​ 15,073 ​ ​ ​ ​ 15,073 ​ ​ ​ ​ Subordinated debentures ​ 33,000 ​ 33,096 ​ ​ ​ ​ 33,096 ​ ​ ​ ​ Accrued interest payable ​ ​ 736 ​ 736 ​ ​ ​ ​ ​ 736 ​ ​ ​ ​ Interest rate swaps ​ 14,099 ​ 14,099 ​ ​ ​ ​ ​ 14,099 ​ ​ ​ ​ Total ​ $ 2,499,717 ​ $ 2,504,018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable ​ ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs December 31, 2019 Value Value (level 1) (level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 31,153 ​ $ 31,153 ​ $ 31,153 ​ ​ ​ ​ ​ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 330,478 ​ 330,478 ​ ​ 24,128 ​ $ 306,350 ​ ​ ​ ​ Common equity securities ​ ​ 423 ​ ​ 423 ​ ​ 423 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 7,656 ​ 7,889 ​ ​ ​ ​ 7,889 ​ ​ ​ ​ Loans held for sale ​ 986 ​ 986 ​ ​ ​ ​ 986 ​ ​ ​ ​ Net loans ​ 1,915,563 ​ 1,881,658 ​ ​ ​ ​ ​ ​ ​ $ 1,881,658 ​ Accrued interest receivable ​ 6,981 ​ 6,981 ​ ​ ​ ​ 6,981 ​ ​ ​ ​ Mortgage servicing rights ​ 738 ​ 1,444 ​ ​ ​ ​ 1,444 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ 10,201 ​ 10,201 ​ ​ ​ ​ 10,201 ​ ​ ​ ​ Interest rate floor ​ ​ 944 ​ ​ 944 ​ ​ ​ ​ ​ 944 ​ ​ ​ ​ Interest rate swaps ​ ​ 4,728 ​ ​ 4,728 ​ ​ ​ ​ ​ 4,728 ​ ​ ​ ​ Total ​ $ 2,309,851 ​ $ 2,276,885 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 1,971,489 ​ $ 1,972,084 ​ ​ ​ ​ $ 1,972,084 ​ ​ ​ ​ Long-term debt ​ 32,733 ​ 33,075 ​ ​ ​ ​ 33,075 ​ ​ ​ ​ Accrued interest payable ​ 1,277 ​ 1,277 ​ ​ ​ ​ ​ 1,277 ​ ​ ​ ​ Interest rate swaps ​ ​ 4,680 ​ ​ 4,680 ​ ​ ​ ​ ​ 4,680 ​ ​ ​ ​ Total ​ $ 2,010,179 ​ $ 2,011,116 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Derivatives and hedging activit

Derivatives and hedging activities	12 Months Ended
	Dec. 31, 2020
Derivatives and hedging activities
Derivatives and hedging activities	15. Derivatives and hedging activities: Risk Management Objective of Using Derivatives The Company is exposed to certain risk arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts principally related to the Company’s assets and borrowings. ​ Cash Flow Hedges of Interest Rate Risk ​ The Company’s objectives in using interest rate derivatives are to add stability to interest income/expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps and floors as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Interest rate floors designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty if interest rates fall below the strike rate on the contract in exchange for an up-front premium. During 2020, such derivatives were used to hedge the variable cash flows associated with existing variable-rate assets and issuances of debt. ​ The Company executed an interest rate swap to reduce its exposure to variability in the interest rate associated with floating-rate borrowings. For derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in Accumulated Other Comprehensive Income and subsequently reclassified into interest expense/income in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense/income as interest payments are made/received on the Company’s variable-rate debt/assets. During 2021 the Company estimates that an additional $50 will be reclassified as a decrease to interest income. Non-designated Hedges Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain customers. The Company executes interest rate swaps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that the Company executes with a third party, such that the Company minimizes its net risk exposure resulting from such transactions. As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. As of December 31, 2020, the Company had 73 interest rate swaps with an aggregate notional amount of $375,341 related to this program. ​ Fair Values of Derivative Instruments on the Balance Sheet The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Consolidated Balance Sheets as of December 31, 2020 and December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Asset Derivatives ​ Asset Derivatives ​ Liability Derivatives ​ Liability Derivatives ​ ​ ​ ​ As of December 31, 2020 ​ As of December 31, 2019 (1) ​ As of December 31, 2020 ​ As of December 31, 2019 (2) ​ Notional Balance Sheet ​ ​ Balance Sheet ​ ​ Balance Sheet ​ ​ Balance Sheet ​ ​ ​ ​ Amount ​ Location ​ Fair Value ​ Location ​ Fair Value ​ Location ​ Fair Value ​ Location ​ Fair Value Derivatives designated as hedging instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Floor $ 25,000 ​ Other Assets ​ $ 1,678 ​ Other Assets ​ $ 944 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap $ 50,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Liabilities ​ $ 485 ​ ​ ​ ​ ​ Total derivatives designated as hedging instruments ​ ​ ​ ​ ​ $ 1,678 ​ ​ ​ $ 944 ​ ​ ​ $ 485 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not ​ ​ ​ ​ ​ ​ Interest Rate Swaps (3) $ 375,341 ​ Other Assets $ 13,693 Other Assets $ 4,728 Other Liabilities $ 13,614 Other Liabilities ​ $ 4,680 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total derivatives not ​ ​ ​ $ 13,693 ​ $ 4,728 ​ $ 13,614 ​ $ 4,680 (1) Assets amount does not include accrued interest receivable of $235 (2) Liabilities amount does not include accrued interest payable of $235 (3) Notional amount of interest rate swaps at December 31, 2019 $172,096 ​ Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Loss) ​ The table below presents the effect of fair value and cash flow hedge accounting on accumulated other comprehensive income (loss) as of December 31, 2020 and December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of ​ ​ ​ ​ ​ Amount of ​ ​ Amount of ​ ​ ​ Amount of ​ ​ Amount of ​ ​ Amount of ​ Gain or (Loss) ​ ​ Amount of ​ ​ Gain (Loss) ​ ​ Gain (Loss) ​ ​ ​ Gain (Loss) ​ ​ Gain (Loss) ​ ​ Loss ​ Recognized from ​ ​ Gain (Loss) ​ ​ Reclassified ​ ​ Reclassified ​ ​ ​ Recognized in ​ ​ Recognized in ​ ​ Recognized in ​ Accumulated ​ ​ Reclassified ​ ​ from Accumulated ​ ​ from Accumulated Derivatives in ​ ​ OCI on ​ ​ OCI Included ​ ​ OCI Excluded ​ Other Comprehensive ​ ​ from Accumulated ​ ​ OCI into Income ​ ​ OCI into Income Hedging Derivative Component Component Income into OCI into Income Included Component Excluded Component Relationships ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap ​ $ 71 ​ $ 71 ​ ​ ​ ​ Interest Expense ​ $ (40) ​ $ (40) ​ ​ ​ Interest Rate Floor (*) ​ $ (18) ​ $ (17) ​ $ (1) ​ Interest Income ​ $ 134 ​ $ 150 ​ $ (16) Total ​ $ 53 ​ $ 54 ​ $ (1) ​ ​ ​ $ 94 ​ $ 110 ​ $ (16) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of ​ ​ ​ ​ ​ Amount of ​ ​ Amount of ​ ​ ​ Amount of ​ ​ Amount of ​ ​ Amount of ​ Gain or (Loss) ​ ​ Amount of ​ ​ Gain ​ ​ Loss ​ ​ ​ Gain ​ ​ Gain ​ ​ Gain ​ Recognized from ​ ​ Loss ​ ​ Reclassified ​ ​ Reclassified ​ ​ ​ Recognized in ​ ​ Recognized in ​ ​ Recognized in ​ Accumulated ​ ​ Reclassified ​ ​ from Accumulated ​ ​ from Accumulated Derivatives in ​ ​ OCI on ​ ​ OCI Included ​ ​ OCI Excluded ​ Other Comprehensive ​ ​ from Accumulated ​ ​ OCI into Income ​ ​ OCI into Income Hedging ​ Derivative ​ Component ​ Component ​ Income into ​ OCI into Income ​ Included Component ​ Excluded Component Relationships ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Floor (*) ​ $ 192 ​ $ 196 ​ $ (4) ​ Interest Income ​ $ 26 ​ $ 42 ​ $ (16) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ * Amounts disclosed are gross and not net of taxes. ​ Effect of Fair Value and Cash Flow Hedge Accounting on the Consolidated Statements of Income and Comprehensive Income ​ The table below presents the effect of the Company’s derivative financial instruments on the consolidated statements of income and comprehensive income as of December 31, 2020 and December 31, 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) Recognized in ​ ​ ​ Income on Fair Value and Cash Flow Hedging ​ ​ ​ Relationships ​ ​ ​ 2020 ​ ​ 2020 ​ ​ 2019 ​ 2019 ​ Interest Income Interest Expense Interest Income Interest Expense Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded ​ $ 134 ​ $ (40) ​ $ 26 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The effects of fair value and cash flow hedging: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gain or (loss) on cash flow hedging relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest contracts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income ​ $ 134 ​ $ (40) ​ $ 26 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component ​ $ 150 ​ ​ ​ ​ $ 42 ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component ​ $ (16) ​ ​ ​ ​ $ (16) ​ ​ ​ Effect of Derivative Instruments on the Consolidated Statements of Income and Comprehensive Income ​ The tables below present the effect of the Company’s other derivative financial instruments on the consolidated statements of income and comprehensive income for the years ended December 31, 2020 and 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of Gain ​ Amount of Loss ​ ​ ​ ​ Recognized in ​ Recognized in ​ ​ Location of Gain or (Loss) ​ Income ​ Income ​ ​ Recognized in Income on ​ Twelve Months Ended ​ Twelve Months Ended Derivatives Not Designated as Hedging Instruments Derivative December 31, 2020 December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Swaps Interest rate swap revenue ​ $ 31 ​ $ 77 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fee Income ​ Interest rate swap revenue ​ $ 2,290 ​ $ 1,713 ​ ​ Offsetting Derivatives The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s derivatives as of December 31, 2020 and December 31, 2019. The net amounts of derivative assets or liabilities can be reconciled to the tabular disclosure of fair value. The tabular disclosure of fair value provides the location that derivative assets and liabilities are presented on the consolidated balance sheets. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ Assets Balance Sheet Balance Sheet Instruments Received Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 15,371 ​ $ ​ ​ $ 15,371 ​ $ ​ ​ ​ ​ ​ $ 15,371 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Assets ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Received ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 14,099 ​ $ ​ ​ $ 14,099 ​ $ ​ ​ ​ ​ ​ $ 14,099 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Assets ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Received ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 5,672 ​ $ ​ ​ $ 5,672 ​ $ ​ ​ ​ ​ ​ $ 5,672 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Assets ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Received ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 4,680 ​ $ ​ ​ $ 4,680 ​ $ ​ ​ ​ ​ ​ $ 4,680 ​ Credit-risk-related Contingent Features ​ The Company has agreements with certain of its derivative counterparties that contain a provision where if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its derivative counterparties that contain a provision where if the Company fails to maintain its status as a well capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations under the agreements. As of December 31, 2020, the termination value of derivatives in a net asset position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $79. As of December 31, 2019, the termination value of derivatives in a net asset position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $48. The Company has minimum collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $15,360 against its obligations under these agreements as of December 30, 2020, compared to having posted collateral of $4,140 with counterparties at December 31, 2019. If the Company had breached any of these provisions it could have been required to settle its obligations under the agreements at the termination value.

Stock plans

Stock plans	12 Months Ended
	Dec. 31, 2020
Stock plans
Stock plans	16. Stock plans: ​ The 2008 long-term incentive plan (“2008 Plan”) allowed for eligible participants to be granted equity awards. No awards may be made under the 2008 Plan after January 15, 2018. In May 2017, the Company’s stockholders approved the 2017 equity incentive plan (“2017 Plan”). The 2017 Plan allows for eligible participants to be granted equity awards. Under the 2017 Plan the Compensation Committee of the Board of Directors has the authority to, among other things: ● Select the persons to be granted awards under the 2017 Plan. ● Determine the type, size and term of awards. ● Determine whether such performance objectives and conditions have been met. ● Accelerate the vesting or excercisability of an award. Persons eligible to receive awards under the 2008 Plan and 2017 Plan include directors, officers, employees, consultants and other service providers of the Company and its subsidiaries. As of December 31, 2020, 56,966 shares of the Company’s common stock were available for grant as awards pursuant to the 2017 Plan. The 2008 Plan expired in January 2018 but remained in effect in accordance with its terms to govern outstanding awards under that plan. As of December 31, 2020, no awards are outstanding under the 2008 Plan. If any outstanding awards under the 2017 Plan are forfeited by the holder or canceled by the Company, the underlying shares would be available for regrant to others. The 2017 Plan authorizes grants of stock options, stock appreciation rights, cash awards, performance awards, restricted stock and restricted stock units. In 2020, the Company awarded 3,615 shares of non-performance-based restricted stock and 12,654 performance-based restricted stock units under the 2017 Plan. In 2019, the Company awarded 3,855 shares of non-performance-based restricted stock and 13,490 performance-based restricted stock units under the 2017 Plan. In 2020, 1,920 shares of non-performance-based and 6,535 shares of performance based restricted stock granted under the 2017 Plan vested along with 673 shares of non-performance-based restricted stock granted under the 2008 Plan and there were 1,875 shares forfeited under the provisions of the 2017 Plan. In 2019, 1,614 shares of non-performance-based restricted stock and 928 shares of performance-based shares granted under the 2017 Plan vested along with 674 shares of non-performance-based restricted stock and 5,743 of performance-based shares granted under the 2008 Plan. There were 1,711 shares forfeited under the provisions of the 2017 Plan and 1,327 shares forfeited under the provisions of the 2008 plan. The non-performance restricted stock grants made in 2020, 2019, 2018 and 2017 vest equally over three years from the grant date. The performance-based restricted stock units vest three years after the grant date and include conditions based on the Company’s three year cumulative diluted earnings per share and three-year average return on equity or tangible equity that determines the number of restricted stock units that may vest. The activity related to the 2017 Plan for each of the years ended December 31, 2020, 2019 and 2018 was as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Nonvested, January 1 25,984 12,892 1,538 ​ Granted shares ​ 16,269 17,345 11,468 ​ Vested shares 8,455 ​ 2,542 ​ 114 ​ Forfeited shares ​ 1,875 ​ 1,711 ​ ​ ​ Nonvested, December 31 31,923 25,984 12,892 ​ ​ The Company expenses the fair value of all-share based compensation over the requisite service period commencing at grant date. The fair value of restricted stock is expensed on a straight-line basis. Compensation is recognized over the vesting period and adjusted based on the performance criteria. The Company classifies share-based compensation for employees within “salaries and employee benefits expense” on the Consolidated Statements of Income and Comprehensive Income. In 2020, the Company recognized $570 for awards granted under the 2017 Plan. In 2019, the Company recognized $432 for awards granted under the 2017 Plan and $122 for awards granted under the 2008 plan. In 2018, the Company recognized $149 for awards granted under the 2017 Plan and $123 for awards granted under the 2008 plan. As of December 31, 2020, the Company had 1.9

Employee benefit plans

Employee benefit plans	12 Months Ended
	Dec. 31, 2020
Employee benefit plans
Employee benefit plans	17. Employee benefit plans: The Company sponsors a separate ESOP and Retirement Profit Sharing 401(k) Plan. The Company also maintains SERPs and an employees’ pension plan, which is currently frozen. Under the ESOP, amounts voted by the Company’s board of directors are paid into the ESOP and each eligible participant is credited with an amount in proportion to their annual compensation or a fixed dollar amount. All contributions to the ESOP are invested in or will be invested primarily in Company stock. Distribution of a participant’s ESOP account occurs upon retirement, death or termination in accordance with the plan provisions. Under the Retirement Profit Sharing Plan, amounts approved by the board of directors have been paid into a fund and each participant was credited with an amount in proportion to their annual compensation. Upon retirement, death or termination, each participant is paid the total amount of their credits in the fund in one of a number of optional ways in accordance with the plan provisions. Eligible participants may elect deferrals of up to the maximum amounts permitted by law. The Company contributed $371, $357 and $197 to the ESOP in 2020, 2019 and 2018. In addition, the Company contribution of $1,207, $1,139 and $1,047 to the Retirement Profit Sharing Plan in 2020, 2019 and 2018, was comprised of a safe harbor contribution of $655, $627 and $578 and a discretionary match of $552, $512 and $469. The Company established a SERP Plan to replace certain 401(k) plan benefits lost due to compensation limits imposed on qualified plans by federal tax law. The annual benefit is a maximum of 6% of the executive compensation in excess of Federal limits. The total liability associated with this plan was $142 and $133 at December 31, 2020 and 2019, respectively. The expense associated with the plan was $9, $17 and $20 for 2020, 2019 and 2018 respectively. The Company has SERPs for the benefit of certain officers. At December 31, 2020 and 2019, other liabilities include $2,351 and $2,077 accrued under the Plans. Compensation expense includes approximately $461, $360 and $335 relating to these SERPs for the years ended December 31, 2020, 2019 and 2018, respectively. Under the Employees’ Pension Plan, currently under curtailment, amounts computed on an actuarial basis were being paid by the Company into a trust fund. The plan provided for fixed benefits payable for life upon retirement at the age of 65, based on length of service and compensation levels as defined in the plan. As of June 22, 2008 no further benefits are being accrued in this plan. Plan assets of the trust fund are invested and administered by the Trust Department of the Company. Information related to the Employees’ Pension Plan is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits December 31 ​ 2020 ​ 2019 Change in benefit obligation: ​ ​ ​ ​ ​ Benefit obligation, beginning ​ $ 17,491 ​ $ 16,338 ​ Interest cost ​ 544 ​ 639 ​ Change in experience gain ​ (291) ​ 96 ​ Change in actuarial assumptions loss ​ 2,159 ​ 1,221 ​ Benefits paid ​ (790) ​ (803) ​ Benefit obligation, ending ​ 19,113 ​ 17,491 ​ Change in plan assets: ​ ​ ​ ​ ​ ​ ​ Fair value of plan assets, beginning ​ 16,930 ​ 14,919 ​ Actual return on plan assets ​ 1,488 ​ 2,814 ​ Employer contributions ​ ​ ​ ​ ​ Benefits paid ​ (790) ​ (803) ​ Fair value of plan assets, ending ​ 17,628 ​ 16,930 ​ Funded status at end of year ​ $ (1,485) ​ $ (561) ​ ​ The Society of Actuaries updated the mortality scale within the mortality tables from MP 2019 to MP 2020 which the Company utilized in its pension plan remeasurements at December 31, 2020 and 2019. The change in the discount rate, coupled with changes in the mortality assumption, resulted in an increase to the benefit obligation of $2,159 in 2020 and $1,221 in 2019. Amounts recognized in the consolidated balance sheets are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits ​ December 31 ​ 2020 ​ 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities $ 1,485 $ 561 ​ Amounts recognized in the accumulated other comprehensive loss consist of: ​ ​ ​ ​ ​ ​ ​ ​ Net actuarial gain ​ (7,977) ​ (6,579) ​ ​ Deferred taxes ​ 1,675 ​ 1,382 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net amount recognized ​ $ (6,302) ​ $ (5,197) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The accumulated benefit obligation for the defined benefit pension plan was $19,113 and $17,491 at December 31, 2020 and 2019, respectively. Components of net periodic pension income and other amounts recognized in other comprehensive loss are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Years Ended December 31, ​ 2020 ​ 2019 ​ 2018 Net periodic pension income: ​ ​ ​ ​ ​ ​ ​ Interest cost ​ $ 544 ​ $ 639 ​ $ 623 ​ Expected return on plan assets ​ (1,236) ​ (1,084) ​ (960) ​ Amortization of unrecognized net loss ​ 218 ​ 227 ​ 194 ​ Net periodic pension income: ​ (474) ​ (218) ​ ​ (143) ​ Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loss (gain) ​ 544 ​ 639 ​ (590) ​ Deferred tax ​ (114) ​ (134) ​ 124 ​ Total recognized in other comprehensive income (loss) ​ 430 ​ 505 ​ (466) ​ Total recognized in net period pension cost and other comprehensive income (loss) ​ $ (44) ​ $ 287 ​ $ (609) ​ ​ Weighted-average assumptions used to determine benefit obligations and related expenses were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits ​ December 31, ​ 2020 ​ 2019 ​ 2018 ​ Discount rate: ​ ​ ​ ​ ​ Obligation 2.25 % 3.25 % 4.00 % ​ Expense 3.25 ​ 4.00 ​ 3.75 ​ ​ Expected long-term return on plan assets 7.50 % 7.50 % 7.50 % ​ ​ The expected long-term return on plan assets was determined using average historical returns of the Company’s plan assets. The Company’s pension plan weighted-average asset allocations at December 31, 2020 and 2019, by asset category are as follows: ​ ​ ​ ​ ​ ​ ​ December 31, 2020 2019 Asset Category: ​ ​ ​ ​ ​ Cash and cash equivalents 6.8 % 6.2 % Equity securities 63.3 ​ 61.9 ​ Corporate bonds 20.7 ​ 20.6 ​ U.S. government securities 9.2 ​ 11.3 ​ ​ 100.0 % 100.0 % ​ Fair value measurement of pension plan assets at December 31, 2020 and 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in ​ ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Significant ​ Significant ​ ​ ​ ​ for Identical ​ Observable ​ Observable ​ ​ ​ ​ Assets ​ Inputs ​ Inputs December 31, 2020 ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Cash and cash equivalents ​ $ 1,203 ​ $ 1,203 ​ ​ ​ $ ​ ​ Equity securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. large cap ​ 10,266 ​ 10,266 ​ ​ ​ ​ ​ ​ ​ International ​ 888 ​ 888 ​ ​ ​ ​ ​ ​ ​ Fixed income securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ 216 ​ ​ ​ ​ $ 216 ​ ​ ​ ​ U.S. government agencies ​ 1,400 ​ ​ ​ ​ 1,400 ​ ​ ​ ​ Corporate bonds ​ 3,655 ​ ​ ​ ​ 3,655 ​ ​ ​ ​ Total ​ $ 17,628 ​ $ 12,357 ​ $ 5,271 ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Significant ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Observable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs December 31, 2019 ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Cash and cash equivalents ​ $ 1,053 ​ $ 1,053 ​ ​ ​ ​ $ ​ ​ Equity securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. large cap ​ 9,663 ​ 9,663 ​ ​ ​ ​ ​ ​ ​ International ​ 817 ​ 817 ​ ​ ​ ​ ​ ​ ​ Fixed income securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ 202 ​ ​ ​ ​ $ 202 ​ ​ ​ ​ U.S. government agencies ​ 1,713 ​ ​ ​ ​ 1,713 ​ ​ ​ ​ Corporate bonds ​ 3,482 ​ ​ ​ ​ 3,482 ​ ​ ​ ​ Total ​ $ 16,930 ​ $ 11,533 ​ $ 5,397 ​ $ ​ ​ ​ The Company investment policies and strategies with respect to the pension plan include: (i) the Trust and Investment Division’s equity philosophy is large-cap core with a value bias. We invest in individual high-grade common stocks that are selected from our approved list; (ii) diversification is maintained by having no more than 20% in any industry sector and no individual equity representing more than 10% of the portfolio; and (iii) the fixed income style is conservative but also responsive to the various needs of our individual clients. Fixed income securities consist of U.S. government agencies or corporate bonds rated “A” or better. The Company targets the following allocation percentages: (i) cash equivalents 10%; (ii) fixed income 40% ; and (iii) equities 50%. There is no Company stock included in equity securities at December 31, 2020 or 2019. The Company has not determined the amount of the expected contribution to the Employees’ Pension Plan for 2021. The following benefit payments are expected to be paid in the next five years and in the aggregate for the five years thereafter: ​ ​ ​ ​ ​ ​ ​ Pension Benefits 2021 ​ $ 840 ​ 2022 ​ 878 ​ 2023 ​ 896 ​ 2024 ​ 948 ​ 2025 ​ 970 ​ Thereafter ​ ​ 5,019 ​ ​

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2020
Income taxes
Income taxes	18. Income taxes: The current and deferred amounts of the provision for income taxes expense (benefit) for each of the years ended December 31, 2020, 2019 and 2018 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Current ​ $ 6,600 ​ $ 2,761 ​ $ 4,072 ​ Deferred ​ (1,779) ​ 394 ​ (681) ​ Total ​ $ 4,821 ​ $ 3,155 ​ $ 3,391 ​ The components of the net deferred tax asset at December 31, 2020 and 2019 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 ​ ​ ​ ​ ​ ​ ​ ​ Deferred tax assets: ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ $ 5,742 ​ $ 4,762 ​ Lease liability ​ ​ 1,349 ​ ​ 1,301 ​ Defined benefit plan ​ 1,108 ​ 815 ​ Deferred compensation ​ 789 ​ 682 ​ Deferred loan fees ​ 1,368 ​ 525 ​ Other ​ 170 ​ 137 ​ Total ​ 10,526 ​ 8,222 ​ Deferred tax liabilities: ​ ​ ​ ​ ​ ​ ​ Lease right-of-use assets ​ ​ 1,319 ​ ​ 1,286 ​ Premises and equipment, net ​ 1,455 ​ 1,350 ​ Merger related accounting ​ 694 ​ ​ 850 ​ Deferred loan costs ​ ​ 936 ​ ​ 716 ​ Investment securities available-for-sale ​ 2,033 ​ 416 ​ Other ​ 321 ​ 242 ​ Total ​ 6,758 ​ 4,860 ​ Net deferred tax asset ​ $ 3,768 ​ $ 3,362 ​ Management believes that future taxable income will be sufficient to utilize deferred tax assets. Core earnings of the Company have remained strong and will continue to support the recognition of the deferred tax asset based on future growth projections. A reconciliation between the amount of the effective income tax expense and the income tax expense that would have been provided at the federal statutory rate of 21.0 percent for the years ended December 31, 2020, December 31, 2019 and December 31, 2018 is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ ​ ​ 2019 ​ ​ ​ 2018 ​ Year Ended December 31 Amount % ​ Amount % ​ Amount ​ % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Federal income tax at statutory rate ​ $ 7,177 ​ 21.00 % ​ $ 6,067 ​ 21.00 % ​ $ 5,945 ​ 21.00 % Effect of federal income tax rate changes (Note 1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax exempt interest ​ (1,032) ​ (3.02) ​ ​ (1,299) ​ (4.50) ​ ​ (1,320) ​ (4.66) ​ Bank owned life insurance income ​ (299) ​ (0.87) ​ ​ (159) ​ (0.55) ​ ​ (236) ​ (0.83) ​ Residential housing program tax credits ​ (1,094) ​ (3.20) ​ ​ ​ (1,094) ​ (3.79) ​ ​ ​ (1,094) ​ (3.87) ​ Other, net ​ 69 ​ 0.19 ​ ​ (360) ​ (1.25) ​ ​ 96 ​ 0.34 ​ Total ​ $ 4,821 ​ 14.10 % ​ $ 3,155 ​ 10.91 % ​ $ 3,391 ​ 11.98 % ​

Parent Company financial statem

Parent Company financial statements	12 Months Ended
	Dec. 31, 2020
Parent Company financial statements
Parent Company financial statements	19. Parent Company financial statements: CONDENSED BALANCE SHEETS ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 Assets: ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 1,069 ​ $ 5,192 ​ Equity securities ​ ​ 138 ​ ​ 423 ​ Investment in bank subsidiary ​ 348,584 ​ 293,415 ​ Other assets ​ 273 ​ 19 ​ Total assets ​ $ 350,064 ​ $ 299,049 ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities and Stockholders’ Equity: ​ ​ ​ ​ ​ ​ ​ Subordinated debt ​ $ 33,000 ​ ​ ​ ​ Accrued interest payable ​ ​ 148 ​ ​ ​ ​ Other liabilities ​ ​ 39 ​ $ 39 ​ Stockholders’ equity ​ 316,877 ​ 299,010 ​ Total liabilities and stockholders’ equity ​ $ 350,064 ​ $ 299,049 ​ ​ CONDENSED STATEMENTS OF INCOME ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividends from subsidiaries ​ $ 10,518 ​ $ 10,131 ​ $ 9,691 ​ Other income ​ ​ 8 ​ ​ 8 ​ ​ 72 ​ Net gain realized on sale of equity securities ​ ​ 29 ​ ​ ​ ​ ​ ​ ​ Unrealized holding gains (losses) on equity securities ​ (35) ​ 132 ​ 13 ​ Total income ​ 10,520 ​ 10,271 ​ 9,776 ​ Expense: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest expense on subordinated debt ​ ​ 1,035 ​ ​ ​ ​ ​ ​ ​ Other expenses ​ 200 ​ 145 ​ 214 ​ Total expenses ​ 1,235 ​ 145 ​ 214 ​ Income before taxes and undistributed income ​ 9,285 ​ 10,126 ​ 9,562 ​ Income tax benefit ​ ​ (255) ​ (1) ​ (27) ​ Income before undistributed income of subsidiaries ​ 9,540 ​ 10,127 ​ 9,589 ​ Equity in undistributed net income of subsidiaries ​ 19,814 ​ 15,609 ​ 15,331 ​ Net income ​ $ 29,354 ​ $ 25,736 ​ $ 24,920 ​ ​ condensed Statements of Cash Flows ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Cash flows from operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 29,354 ​ $ 25,736 ​ $ 24,920 ​ Adjustments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net losses (gains) on investment securities ​ 6 ​ (132) ​ (14) ​ Undistributed net income of subsidiaries ​ (19,814) ​ (15,609) ​ (15,331) ​ Decrease in other assets ​ (255) ​ (302) ​ ​ (106) ​ Increase (decrease) in other liabilities ​ 148 ​ ​ ​ (10) ​ Stock based compensation ​ 570 ​ 554 ​ 272 ​ Increase in due from subsidiaries ​ ​ ​ ​ 1,974 ​ ​ ​ ​ Net cash provided by operating activities ​ 10,009 ​ 12,221 ​ 9,731 ​ Cash flows from investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Purchase of equity securities ​ ​ ​ ​ ​ (234) ​ Sale of equity securities ​ ​ 279 ​ ​ ​ ​ ​ ​ ​ Net cash provided by (used in) investing activities ​ 279 ​ ​ ​ (234) ​ Cash flows used in financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Proceeds from subordinated debt ​ ​ 33,000 ​ ​ ​ ​ ​ ​ ​ Investment in subsidiary ​ ​ (30,000) ​ ​ ​ ​ ​ ​ ​ Retirement of stock ​ (6,893) ​ ​ (634) ​ ​ ​ ​ Cash dividends paid ​ (10,518) ​ (10,131) ​ (9,693) ​ Net cash used in financing activities ​ (14,411) ​ (10,765) ​ (9,693) ​ Increase (decrease) in cash ​ (4,123) ​ 1,456 ​ (196) ​ Cash at beginning of year ​ 5,192 ​ 3,736 ​ 3,932 ​ Cash at end of year ​ $ 1,069 ​ $ 5,192 ​ $ 3,736 ​ ​

Regulatory matters

Regulatory matters	12 Months Ended
	Dec. 31, 2020
Regulatory matters
Regulatory matters	20. Regulatory matters: Dividends are paid by the Parent Company from its assets, which are mainly provided by dividends from Peoples Bank. Under the Pennsylvania Business Corporation Law of 1988, as amended, the Company may not pay a dividend if, after payment, either the Company could not pay its debts as they become due in the usual course of business, or the Company’s total assets would be less than its total liabilities. The determination of total assets and liabilities may be based upon: (i) financial statements prepared on the basis of GAAP; (ii) financial statements that are prepared on the basis of other accounting practices and principles that are reasonable under the circumstances; or (iii) a fair valuation or other method that is reasonable under the circumstances. In addition, the Federal Reserve Board has the power to prohibit dividends by bank holding companies if their actions constitute unsafe or unsound practices. The Federal Reserve Board has issued a policy statement on the payment of cash dividends by bank holding companies, which expresses the Federal Reserve Board’s view that a bank holding company should pay cash dividends only to the extent that the company’s net income for the past year is sufficient to cover both the cash dividends and a rate of earnings retention that is consistent with the company’s capital needs, asset quality and overall financial condition. The Federal Reserve Board also indicated that it would be inappropriate for a bank holding company experiencing serious financial problems to borrow funds to pay dividends. Under the prompt corrective action regulations, the Federal Reserve Board may prohibit a bank holding company from paying any dividends if the holding company’s bank subsidiary is classified as “undercapitalized.” ​ In addition, under the Pennsylvania Banking Code of 1965, as amended, Peoples Bank may only declare and pay dividends out of accumulated net earnings, or accumulated net earnings acquired as a result of a merger within seven years. Further, Peoples Bank may not declare or pay any dividend unless Peoples Bank’s surplus would not be reduced by the payment of the dividend below 100 percent of our capital stock. Pennsylvania law requires that each year Peoples Bank set aside as surplus, a sum equal to not less than 10 percent of its net earnings if surplus does not equal at least 100 percent of our capital stock. Under federal law and FDIC regulations, an insured bank may not pay dividends if doing so would make it undercapitalized within the meaning of the prompt corrective action law or if in default of its deposit insurance fund assessment. Although subject to the aforementioned regulatory restrictions, the Company’s consolidated retained earnings at December 31, 2020 and 2019 were not restricted under any borrowing agreement as to payment of dividends or reacquisition of common stock. The Company has paid cash dividends since its formation as a bank holding company in 1986. It is the present intention of the Board of Directors to continue this dividend payment policy, however, further dividends must necessarily depend upon earnings, financial condition, appropriate legal restrictions and other factors relevant at the time the Board of Directors considers payment of dividends. The amount of funds available for transfer from Peoples Bank to the Company in the form of loans and other extensions of credit is also limited. Under Federal regulation, transfers to any one affiliate are limited to 10.0 percent of capital and surplus. At December 31, 2020, the maximum amount available for transfer from Peoples Bank to the Company in the form of loans amounted to $31,002. At December 31, 2020 and 2019, there were no loans outstanding, nor were any advances made during 2020 and 2019. The Company and Peoples Bank are subject to certain regulatory capital requirements administered by the federal banking agencies, which are defined in Section 38 of the Federal Deposit Insurance Corporation Improvement Act of 1991 (“FDICIA”). Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s and Peoples Bank’s consolidated financial statements. In the event an institution is deemed to be undercapitalized by such standards, FDICIA prescribes an increasing amount of regulatory intervention, including the required institution of a capital restoration plan and restrictions on the growth of assets, branches or lines of business. Further restrictions are applied to the significantly or critically undercapitalized institutions including restrictions on interest payable on accounts, dismissal of management and appointment of a receiver. For well capitalized institutions, FDICIA provides authority for regulatory intervention when the institution is deemed to be engaging in unsafe and unsound practices or receives a less than satisfactory examination report rating. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and Peoples Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Prompt corrective action provisions are not applicable to bank holding companies. Risk-based capital rules require that banks and holding companies maintain a "capital conservation buffer" of 250 Peoples Bank met the capital requirement for the “well capitalized” category under the regulatory framework for prompt corrective action at December 31, 2020. To be categorized as well capitalized, Peoples Bank must maintain certain minimum Tier I risk-based, total risk-based and Tier I Leverage ratios as set forth in the following tables. The Tier I Leverage ratio is defined as Tier I capital to total average assets less intangible assets. Regulators may assign Peoples Bank to a lower capitalization category based on factors other than capital. The Company and Peoples Bank’s actual capital ratios at December 31, 2020 and 2019, and the minimum ratios required for capital adequacy purposes and to be well capitalized under the prompt corrective action provisions are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum to be Well ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capitalized under ​ ​ ​ ​ ​ ​ ​ Minimum For Capital ​ Prompt Corrective ​ ​ Actual ​ Adequacy Purposes ​ Action Provisions December 31, 2020 ​ Amount ​ Ratio ​ Amount ​ Ratio ​ Amount ​ Ratio Common equity Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 250,397 12.16 % $ 92,631 4.50 % ​ ​ ​ ​ ​ Peoples Bank ​ 282,104 13.73 ​ 92,461 4.50 ​ $ 133,554 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ ​ 250,397 12.16 ​ ​ 123,508 6.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 282,104 13.73 ​ 123,281 6.00 ​ ​ 164,374 8.00 ​ Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 310,741 15.10 ​ 164,677 8.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 307,807 14.98 ​ 164,374 8.00 ​ 205,468 10.00 ​ Tier 1 capital to average assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 250,397 9.28 ​ 107,878 4.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ ​ 282,104 10.08 % ​ 111,891 4.00 % ​ 139,864 5.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum to be Well ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capitalized under ​ ​ ​ ​ ​ ​ ​ Minimum For Capital ​ Prompt Corrective ​ ​ Actual ​ Adequacy Purposes ​ Action Provisions December 31, 2019 ​ Amount ​ Ratio ​ Amount ​ Ratio ​ Amount ​ Ratio Common equity Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 237,280 11.90 % $ 89,717 4.50 % ​ ​ ​ ​ ​ Peoples Bank ​ 231,685 11.64 ​ 89,576 4.50 ​ $ 129,387 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ ​ 237,280 11.90 ​ ​ 119,623 6.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 231,685 11.64 ​ 119,434 6.00 ​ ​ 159,246 8.00 ​ Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 259,957 13.04 ​ 159,497 8.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 254,362 12.78 ​ 159,246 8.00 ​ 199,057 10.00 ​ Tier 1 capital to average assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 237,280 10.14 ​ 93,633 4.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ ​ 231,685 9.91 % ​ 93,508 4.00 % ​ 116,884 5.00 % ​

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2020
Contingencies
Contingencies	21. Contingencies: Neither the Company nor any of its property is subject to any material legal proceedings. Management, after consultation with legal counsel, does not anticipate that the ultimate liability, if any, arising out of pending and threatened lawsuits will have a material effect on the operating results or financial position of the Company.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)	22. Accumulated Other Comprehensive Income (Loss): The components of accumulated other comprehensive income (loss) included in stockholders’ equity at December 31, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Net unrealized gain on investment securities available-for-sale ​ $ 9,696 ​ $ 1,835 ​ Income tax ​ 2,036 ​ 385 ​ Net of income taxes ​ 7,660 ​ 1,450 ​ Benefit plan adjustments ​ (7,977) ​ (6,579) ​ Income tax benefit ​ (1,675) ​ (1,382) ​ Net of income taxes ​ (6,302) ​ (5,197) ​ Derivative adjustments ​ 1,002 ​ 687 ​ Income tax ​ 211 ​ 144 ​ Net of income taxes ​ 791 ​ 543 ​ Accumulated other comprehensive income (loss) ​ $ 2,149 ​ $ (3,205) ​ ​ Other comprehensive income (loss) and related tax effects for the years ended December 31, 2020, 2019 and 2018 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 2019 ​ 2018 ​ Unrealized gain (loss) on investment securities available-for-sale ​ $ 8,779 ​ $ 5,109 ​ $ (2,014) ​ Net gain on the sale of investment securities available-for-sale ​ ​ (918) ​ ​ (23) ​ ​ ​ ​ Other comprehensive income on available-for-sale debt securities ​ ​ 7,861 ​ ​ 5,086 ​ ​ (2,014) ​ Benefit plans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of actuarial loss (2) ​ ​ 218 ​ ​ 227 ​ ​ 194 ​ Actuarial gain (loss) ​ ​ (1,616) ​ ​ 412 ​ ​ (785) ​ Net change in benefit plan liabilities ​ (1,398) ​ 639 ​ (591) ​ Net change in derivatives ​ ​ 315 ​ ​ 441 ​ ​ 246 ​ Other comprehensive loss before taxes ​ ​ 6,778 ​ ​ 6,166 ​ (2,359) ​ Income tax (benefit) ​ 1,424 ​ 1,295 ​ (496) ​ Other comprehensive income (loss) ​ $ 5,354 ​ $ 4,871 ​ $ (1,863) ​ ​ (1) Represents amounts reclassified out of accumulated comprehensive income (loss) and included in gains on sale of investment securities on the consolidated statements of income and comprehensive income. (2) Represents amounts reclassified out of accumulated comprehensive income (loss) and included in the computation of net periodic pension expense. Refer to Note 17 included in these consolidated financial statements.

Summary of quarterly financial

Summary of quarterly financial information (unaudited)	12 Months Ended
	Dec. 31, 2020
Summary of quarterly financial information (unaudited)
Summary of quarterly financial information (unaudited)	23. Summary of quarterly financial information (unaudited): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Quarter Ended ​ March 31 ​ June 30 ​ Sept. 30 ​ Dec. 31 Interest income $ 23,842 $ 23,852 $ 23,346 $ 23,085 ​ Interest expense ​ 4,281 ​ 3,345 ​ 3,422 ​ 3,276 ​ Net interest income ​ 19,561 ​ 20,507 ​ 19,924 ​ 19,809 ​ Provision for loan losses ​ 3,500 ​ 1,800 ​ 1,050 ​ 1,050 ​ Net interest income after provision for loan losses ​ 16,061 ​ 18,707 ​ 18,874 ​ 18,759 ​ Noninterest income ​ 3,550 ​ 3,422 ​ 4,935 ​ 4,735 ​ Noninterest expense ​ 13,651 ​ 13,242 ​ 13,974 ​ 14,001 ​ Income before income taxes ​ 5,960 ​ 8,887 ​ 9,835 ​ 9,493 ​ Income tax expense ​ 679 ​ 1,311 ​ 1,523 ​ 1,308 ​ Net income ​ $ 5,281 ​ $ 7,576 ​ $ 8,312 ​ $ 8,185 ​ Per share data: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income - basic ​ $ 0.72 ​ $ 1.03 ​ $ 1.14 ​ $ 1.13 ​ Net income - diluted ​ ​ 0.71 ​ ​ 1.03 ​ ​ 1.13 ​ ​ 1.13 ​ Cash dividends declared ​ $ 0.36 ​ $ 0.36 ​ $ 0.36 ​ $ 0.36 ​ Average common shares outstanding - basic ​ ​ 7,379,438 ​ ​ 7,341,636 ​ ​ 7,277,189 ​ ​ 7,222,810 ​ Average common shares outstanding - diluted ​ 7,405,703 ​ 7,376,700 ​ 7,312,253 ​ 7,257,874 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 Quarter Ended ​ March 31 ​ June 30 ​ Sept. 30 ​ Dec. 31 Interest income $ 22,801 $ 23,332 $ 23,632 $ 23,616 ​ Interest expense ​ 4,504 ​ 4,604 ​ 4,396 ​ 4,364 ​ Net interest income ​ 18,297 ​ 18,728 ​ 19,236 ​ 19,252 ​ Provision for loan losses ​ 1,050 ​ 350 ​ 700 ​ 4,000 ​ Net interest income after provision for loan losses ​ 17,247 ​ 18,378 ​ 18,536 ​ 15,252 ​ Noninterest income ​ 3,416 ​ 4,152 ​ 3,682 ​ 3,870 ​ Noninterest expense ​ 13,490 ​ 14,429 ​ 14,079 ​ 13,644 ​ Income before income taxes ​ 7,173 ​ 8,101 ​ 8,139 ​ 5,478 ​ Income tax expense ​ 761 ​ 957 ​ 991 ​ 446 ​ Net income ​ $ 6,412 ​ $ 7,144 ​ $ 7,148 ​ $ 5,032 ​ Per share data: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income - basic ​ $ 0.87 ​ $ 0.96 ​ $ 0.97 ​ $ 0.68 ​ Net income - diluted ​ ​ 0.87 ​ ​ 0.96 ​ ​ 0.96 ​ ​ 0.68 ​ Cash dividends declared ​ $ 0.34 ​ $ 0.34 ​ $ 0.34 ​ $ 0.35 ​ Average common shares outstanding - basic ​ ​ 7,379,438 ​ ​ 7,399,302 ​ ​ 7,394,992 ​ ​ 7,388,488 ​ Average common shares outstanding - diluted ​ 7,408,536 ​ 7,413,114 ​ 7,417,403 ​ 7,410,899 ​ ​

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2020
Summary of significant accounting policies
Nature of operations	Nature of operations: Peoples Financial Services Corp., a bank holding company incorporated under the laws of Pennsylvania, provides a full range of financial services through its wholly-owned subsidiary, Peoples Security Bank and Trust Company (“Peoples Bank”), collectively, the “Company” or “Peoples”. The Company services its retail and commercial customers through Peoples Bank is a state-chartered bank and trust company under the jurisdiction of the Pennsylvania Department of Banking and Securities and the Federal Deposit Insurance Corporation. Peoples Bank’s primary product is loans to small and medium-sized businesses. Other lending products include one-to-four family residential mortgages and consumer loans. Peoples Bank primarily funds its loans by offering deposits to commercial enterprises and individuals. Deposit product offerings include checking accounts, savings accounts, money market accounts and certificates of deposits. The Company faces competition primarily from commercial banks, thrift institutions and credit unions within its market, many of which are larger in terms of assets and capital. In addition, mutual funds and security brokers compete for various types of deposits, and consumer, mortgage, leasing and insurance companies compete for various types of loans and leases. Principal methods of competing for banking and permitted nonbanking services include price, nature of product, quality of service and convenience of location. Peoples Financial Services Corp. and Peoples Bank are subject to regulations of certain federal and state regulatory agencies and undergo periodic examinations.
Basis of presentation	Basis of presentation: The consolidated financial statements of the Company have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”), Regulation S-X and reporting practices applied in the banking industry. All significant intercompany balances and transactions have been eliminated in consolidation. The Company also presents herein condensed parent company only financial information regarding Peoples Financial Services Corp. (“Parent Company”). Prior period amounts are reclassified when necessary to conform with the current year’s presentation. Such reclassifications had no effect on financial position or results of operations. The Company has evaluated events and transactions occurring subsequent to the balance sheet date of December 31, 2020, for items that should potentially be recognized or disclosed in these consolidated financial statements. The evaluation was conducted through the date these consolidated financial statements were issued.
Estimates	Estimates: The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates that are particularly susceptible to material change in the near term relate to the determination of the allowance for loan losses, fair value of financial instruments, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, the valuation of deferred tax assets, the valuation of derivative instruments, determination of other-than-temporary impairment losses on securities and impairment of goodwill. Actual results could differ from those estimates.
Investment securities	Investment securities: Investment securities are classified and accounted for as either held-to-maturity or available-for-sale securities based on management’s intent at the time of acquisition. Management is required to reassess the appropriateness of such classifications at each reporting date. The Company classifies debt securities as held-to maturity when management has the positive intent and ability to hold such securities to maturity. Held-to-maturity securities are stated at cost, adjusted for amortization of premium and accretion of discount. Investment securities are designated as available-for-sale when they are to be held for indefinite periods of time as management intends to use such securities to implement asset/liability strategies or to sell them in response to changes in interest rates, prepayment risk, liquidity requirements, or other circumstances identified by management. Available-for-sale securities are reported at fair value, with unrealized gains and losses, net of income taxes, excluded from earnings and reported in a separate component of stockholders’ equity. All marketable equity securities are accounted for at fair value with unrealized gains and losses reported in earnings. Estimated fair values for investment securities are based on quoted market prices from a national pricing service. Realized gains and losses are computed using the specific identification method and are included in noninterest income. Premiums on callable debt securities are amortized to the earliest call date from the maturity date. Premiums on non-callable securities are amortized and discounts are accreted using the interest method over the expected life of the security. Investment securities that are bought and held principally for the purpose of selling them in the near term, in order to generate profits from market appreciation, are classified as trading account securities. Transfers of securities between categories are recorded at fair value at the date of the transfer, with the accounting treatment of unrealized gains or losses determined by the category into which the security is transferred. Management evaluates each investment security to determine if a decline in fair value below its amortized cost is an other-than-temporary impairment (“OTTI”) at least quarterly, and more frequently when economic or market concerns warrant an evaluation. Factors considered in determining whether an other-than-temporary impairment was incurred include: (i) the length of time and the extent to which the fair value has been less than amortized cost; (ii) the financial condition and near-term prospects of the issuer; (iii) whether a decline in fair value is attributable to adverse conditions specifically related to the security or specific conditions in an industry or geographic area; (iv) the credit-worthiness of the issuer of the security; (v) whether dividend or interest payments have been reduced or have not been made; (vi) an adverse change in the remaining expected cash flows from the security such that the Company will not recover the amortized cost of the security; (vii) whether management intends to sell the security; and (viii) if it is more likely than not that management will be required to sell the security before recovery. If a decline is judged to be other-than-temporary, the individual security is written-down to fair value with the credit related component of the write-down included in earnings and the non-credit related component included in other comprehensive income or loss. The assessment of whether an other-than-temporary impairment exists involves a high degree of subjectivity and judgment and is based on information available to management at a point in time.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Loans held for sale	Loans held for sale: Loans held for sale consist of one-to-four family residential mortgages originated and intended for sale in the secondary market. The loans are carried in aggregate at the lower of cost or estimated market value, based upon current delivery prices in the secondary mortgage market. Net unrealized losses are recognized through a valuation allowance by corresponding charges to income. Gains or losses on the sale of these loans are recognized in noninterest income at the time of sale using the specific identification method. Loan origination fees, net of certain direct loan origination costs, are included in net gains or losses upon the sale of the related mortgage loan.
Loans, net	Loans, net: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at their outstanding unpaid principal balances, net of deferred fees or costs. Interest income is accrued on the principal amount outstanding. Loan origination fees, net of certain direct origination costs, are deferred and recognized over the contractual life of the related loan as an adjustment to yield using the effective interest method. Premiums and discounts on purchased loans are amortized as adjustments to interest income using the effective interest method. Delinquency fees are recognized in income at the time when they are paid by customer. Transfers of financial assets, which include loan participation sales, are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when: (i) the assets have been isolated from the Company; (ii) the transferee obtains the right, free of conditions that constrain it from taking advantage of that right, to pledge or exchange the transferred assets and (iii) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. The loan portfolio is segmented into commercial and retail loans. Commercial loans consist of commercial, commercial real estate, municipal and other related tax free loans. Retail loans consist of residential real estate and other consumer loans. The Company makes commercial loans for real estate development and other business purposes required by the customer base. The Company’s credit policies establish advance rates against the different forms of collateral that can be pledged against various commercial loans. Typically, the majority of loans will be underwritten to a percentage of their underlying collateral values such as real estate values, equipment, eligible accounts receivable and inventory. Individual loan advance rates may be higher or lower depending upon the financial strength of the borrower and/or term of the loan. Generally, assets financed through commercial loans are used for the operations of the business. Repayment for these types of loans generally comes from the cash flow of the business or the ongoing conversion of assets. Commercial real estate loans include construction, mini-perm, or longer term loans financing commercial properties. Repayment of these loans are generally dependent upon either the ongoing business cash flow from an owner occupied property or the lease/rental income or sale of a non-owner occupied property. Commercial real estate loans typically require a loan to value of not greater than Loans secured by commercial real estate generally have larger balances and involve a greater degree of risk than one-to-four family residential mortgage loans. Of primary concern in commercial real estate lending is the borrower’s and any guarantor’s creditworthiness and the feasibility and cash flow potential of the financed project. Additional considerations include: location, market and geographic concentration risks, loan to value, strength of guarantors and quality of tenants. Payments on loans secured by income properties often depend on successful operation and management of the properties. As a result, repayment of such loans may be subject to a higher level of risk than residential real estate loans, which could be caused by unfavorable conditions in the real estate market or the economy. To effectively monitor loans on income properties, the Company requires borrowers and loan guarantors, if any, to provide annual financial statements on commercial real estate loans and rent rolls where applicable. In reaching a decision on whether to make a commercial real estate loan, the Company considers and reviews a cash flow analysis of the borrower and guarantor, when applicable. In addition, the Company evaluates business cash flows, if applicable, net operating income of the property, the borrower’s expertise, credit history and the value of the underlying property. The Company has generally required that the properties securing these real estate loans have debt service coverage ratios, which is net cash flow before debt service to debt service, of at least Commercial loans are generally made on the basis of a business entity or individual borrower’s ability to make repayment from business cash flows or individual borrowers’ employment and other income. Commercial business loans tend to have a slightly higher risk than commercial real estate loans because collateral usually consists of business assets versus real estate. Further, any collateral securing such loans may depreciate over time and could be difficult to appraise and liquidate. As a result, repayment of commercial business loans may depend substantially on the success of the business itself. Residential mortgages, including home equity loans, are secured by the borrower’s residential real estate in either a first or second lien position. Residential mortgages have varying loan rates depending on the financial condition of the borrower, loan to value ratio and term. Residential mortgages may have amortizations up to 30 years. Consumer loans include installment loans, car loans, and overdraft lines of credit. These loans are both secured and unsecured. Consumer loans may entail greater risk than do residential mortgage loans, particularly in the case of consumer loans that are unsecured. Repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment for the outstanding loan and a small remaining deficiency often does not warrant further substantial collection efforts against the borrower. Consumer loan collections depend on the borrower’s continuing financial stability, and therefore are likely to be adversely affected by various factors, including job loss, divorce, illness or personal bankruptcy. Furthermore, the application of various federal and state laws, including federal and state insolvency laws, may limit the amount that can be recovered on such loans.
Off-balance sheet financial instruments	Off-balance sheet financial instruments: In the ordinary course of business, the Company has entered into off-balance sheet financial instruments consisting of commitments to extend credit, unused portions of lines of credit and standby letters of credit. These financial instruments are recorded in the consolidated financial statements when they are funded. Fees on commercial letters of credit and on unused available lines of credit are recorded as interest and fees on loans and are included in interest income when paid. The Company records an allowance for off-balance sheet credit losses, if deemed necessary, separately as a liability.
Nonperforming assets	Nonperforming assets: Nonperforming assets consist of nonperforming loans and other real estate owned. Nonperforming loans include nonaccrual loans, troubled debt restructured loans and accruing loans past due 90 days 90 days Troubled debt restructured loans are loans with original terms, interest rate, or both, that have been modified as a result of a deterioration in the borrower’s financial condition and a concession has been granted that the Company would not otherwise consider. Unless on nonaccrual, interest income on these loans is recognized when earned, using the interest method. The Company offers a variety of modifications to borrowers that would be considered concessions. The modification categories offered can generally fall within the following categories: ● Rate Modification — A modification in which the interest rate is changed to a below market rate. ● Term Modification — A modification in which the maturity date, timing of payments or frequency of payments is changed. ● Interest Only Modification — A modification in which the loan is converted to interest only payments for a period of time. ● Payment Modification — A modification in which the dollar amount of the payment is changed, other than an interest only modification described above. ● Combination Modification — Any other type of modification, including the use of multiple categories above. The Company segments loans into risk categories based on relevant information about the ability of borrowers to service their debt such as current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. Loans are individually analyzed for credit risk by classifying them within the Company’s internal risk rating system. The Company’s risk rating classifications are defined as follows: ● Pass — A loan to borrowers with acceptable credit quality and risk that is not adversely classified as Substandard, Doubtful, Loss nor designated as Special Mention. ● Special Mention — A loan that has potential weaknesses that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the institution’s credit position at some future date. Special Mention loans are not adversely classified since they do not expose the Company to sufficient risk to warrant adverse classification. ● Substandard — A loan that is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the bank will sustain some loss if the deficiencies are not corrected. ● Doubtful — A loan classified as Doubtful has all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make the collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. ● Loss — A loan classified as Loss is considered uncollectible and of such little value that its continuance as bankable loans is not warranted. This classification does not mean that the loan has absolutely no recovery or salvage value, but rather it is not practical or desirable to defer writing off this basically worthless asset even though partial recovery may be effected in the future. Other real estate owned is comprised of properties acquired through foreclosure proceedings or in-substance foreclosures. A loan is classified as in-substance foreclosure when the Company has taken possession of the collateral regardless of whether formal foreclosure proceedings take place. Other real estate owned is included in other assets and recorded at fair value less cost to sell at the time of acquisition, establishing a new cost basis. Any excess of the loan balance over the recorded value is charged to the allowance for loan losses. Subsequent declines in the recorded values of the properties prior to their disposal and costs to maintain the assets are included in other expenses. Any gain or loss realized upon disposal of other real estate owned is included in noninterest expense.
Allowance for loan losses	Allowance for loan losses: The allowance for loan losses represents management’s estimate of losses inherent in the loan portfolio as of the balance sheet date. The allowance for loan losses account is maintained through a provision for loan losses charged to earnings. Loans, or portions of loans, determined to be confirmed losses are charged against the allowance account and subsequent recoveries, if any, are credited to the account. A loss is considered confirmed when information available at the financial statement date indicates the loan, or a portion thereof, is uncollectible. Nonaccrual, troubled debt restructured and loans deemed impaired at the time of acquisition are reviewed monthly to determine if carrying value reductions are warranted or if these classifications should be changed. Consumer loans are considered losses and charged-off when they are 120 days past due. Management evaluates the adequacy of the allowance for loan losses account quarterly. This assessment is based on past charge-off experience, known and inherent risks in the portfolio, adverse situations that may affect the borrower’s ability to repay, the estimated value of 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. Regulators, in reviewing the loan portfolio as part of the scope of a regulatory examination, may require the Company to increase its allowance for loan losses or take other actions that would require the Company to increase its allowance for loan losses. The allowance for loan losses is maintained at a level believed to be adequate to absorb probable credit losses related to specifically identified loans, as well as probable incurred losses inherent in the remainder of the loan portfolio as of the balance sheet date. The allowance for loan losses consists of an allocated element and an unallocated element. The allocated element consists of a specific allowance for impaired loans individually evaluated and a formula portion for loss contingencies on those loans collectively evaluated. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. All amounts due according to the contractual terms means that both the contractual interest and principal payments of a loan will be collected as scheduled in the loan agreement. Factors considered by management in determining impairment include payment status, ability to pay and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. The Company recognizes interest income on impaired loans, including the recording of cash receipts, for nonaccrual, restructured loans or accruing loans depending on the status of the impaired loan. Loans considered impaired are measured for impairment based on the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. If the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral, if the loan is collateral dependent, is less than the recorded investment in the loan, a specific allowance for the loan will be established. The formula portion of the allowance for loan losses relates to large pools of smaller-balance homogeneous loans and those identified loans considered not individually impaired having similar characteristics as these loan pools. Loss contingencies for each of the major loan pools are determined by applying a total loss factor to the current balance outstanding for each individual pool. The total loss factor is comprised of a historical loss factor using a loss migration method plus qualitative factors, which adjusts the historical loss factor for changes in trends, conditions and other relevant factors that may affect repayment of the loans in these pools as of the evaluation date. Loss migration involves determining the percentage of each pool that is expected to ultimately result in loss based on historical loss experience. The historical loss factor for each pool is a weighted average of the Company’s historical net charge-off ratio for the most recent rolling twelve quarters. Management adjusts these historical loss factors by qualitative factors that represents a number of environmental risks that may cause estimated credit losses associated with the current portfolio to differ from historical loss experience. These environmental risks include: (i) changes in lending policies and procedures including underwriting standards and collection, charge-off and recovery practices; (ii) changes in the composition and volume of the portfolio; (iii) changes in national, local and industry conditions, including the effects of such changes on the value of underlying collateral for collateral-dependent loans; (iv) changes in the volume and severity of classified loans, including past due, nonaccrual, troubled debt restructures and other loan modifications; (v) changes in the levels of, and trends in, charge-offs and recoveries; (vi) the existence and effect of any concentrations of credit and changes in the level of such concentrations; (vii) changes in the experience, ability and depth of lending management and other relevant staff; (viii) changes in the quality of the loan review system and the degree of oversight by the board of directors; and (ix) the effect of external factors such as competition, pandemics and legal and regulatory requirements on the level of estimated credit losses in the current loan portfolio. Each environmental risk factor is assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. Adjustments to the factors are supported through documentation of changes in conditions in a narrative accompanying the allowance for loan loss calculation. Management believes the level of the allowance for loan losses was adequate to absorb probable credit losses inherent in the loan portfolio as of December 31, 2020.
Revenue from Contracts with Customers	Revenue from Contracts with Customers: The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, “Revenue from Contracts with Customers” (“Topic 606”). Under Topic 606, the Company must identify the contract with a customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when (or as) the Company satisfies a performance obligation. Significant revenue has not been recognized in the current reporting period that results from performance obligations satisfied in previous periods. The Company’s primary sources of revenue are derived from interest and dividends earned on loans, investment securities, and other financial instruments that are not within the scope of Topic 606. The Company has evaluated the nature of its contracts with customers and determined that further disaggregation of revenue from contracts with customers into more granular categories beyond what is presented in the consolidated statements of income was not necessary. The Company generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. The following is a discussion of revenues within the scope of the guidance: ● Service charges, fees, commissions and other . Service charges, fees and commissions on deposit accounts include fees for banking services provided, overdrafts and non-sufficient funds. Revenue is generally recognized in accordance with published deposit account agreements for retail accounts or contractual agreements for commercial accounts. The Company’s deposit services also include our ATM and debit card interchange revenue that is presented gross of the associated costs. Interchange revenue is generated by the Company’s deposit customers’ usage and volume of activity. Interchange rates are not controlled by the Company, which effectively acts as processor that collects and remits payments associated with customer debit card transactions. ● Commission and fees on fiduciary activities. Commission and fees on fiduciary activities includes fees and commissions from investment management, administrative and advisory services primarily for individuals, and to a lesser extent, partnerships and corporations. Revenue is recognized on an accrual basis at the time the services are performed and when the Company has a right to invoice and are based on either the market value of the assets managed or the services provided. ● Wealth management income. Wealth management income includes fees and commissions charged when the Company arranges for another party to transfer brokerage services to a customer. The fees and commissions under this agent relationship are based upon stated fee schedules based upon the type of transaction, volume, and value of the services provided. ● Merchant services income . Merchant services revenue is derived from a third party vendor that processes credit card transactions on behalf of the Company’s merchant customers. Merchant services revenue is primarily comprised of residual fee income based on the referred merchant’s processing volumes and/or margin.
Premises and equipment, net	Premises and equipment, net: Land is stated at cost. Premises, equipment and leasehold improvements are stated at cost less accumulated depreciation and amortization. The cost of routine maintenance and repairs is expensed as incurred. The cost of major replacements, renewals and betterments is capitalized. When assets are retired or otherwise disposed of, the cost and related accumulated depreciation and amortization are eliminated and any resulting gain or loss is reflected in noninterest income. Depreciation and amortization are computed principally using the straight-line method based on the following estimated useful lives of the related assets, or in the case of leasehold improvements, to the expected terms of the leases, if shorter: ​ ​ ​ ​ ​ Premises and leasehold improvements 7 ​ Furniture, fixtures and equipment 3 ​ ​
Goodwill and other intangible assets, net	Goodwill and other intangible assets, net: The Company accounts for its acquisitions using the purchase accounting method. Purchase accounting requires the total purchase price to be allocated to the estimated fair values of assets acquired and liabilities assumed, including certain intangible assets that must be recognized. Typically, this allocation results in the purchase price exceeding the fair value of net assets acquired, which is recorded as goodwill. Core deposit intangibles are a measure of the value of checking, money market and savings deposits acquired in business combinations accounted for under the purchase method. Core deposit intangibles and other identified intangibles with finite useful lives are amortized using the sum of the year’s digits over their estimated useful lives of up to ten years. Goodwill and other intangible assets are tested for impairment annually or when circumstances arise indicating impairment may have occurred. In making this assessment that impairment has occurred, management considers a number of factors including, but not limited to, operating results, business plans, economic projections, anticipated future cash flows, and current market data. There are inherent uncertainties related to these factors and management’s judgment in applying them to the analysis of impairment. Changes in economic and operating conditions, as well as other factors, could result in impairment in future periods. Any impairment losses arising from such testing would be reported in the consolidated statements of income and comprehensive income as a separate line item within operations. There were no impairment losses recognized as a result of periodic impairment testing in each of the three-years ended December 31, 2020.
Mortgage servicing rights	Mortgage servicing rights: Mortgage servicing rights are recognized as a separate asset when acquired through sales of loan originations. The Company determines a mortgage servicing right by allocating the total costs incurred between the loan sold and the servicing right, based on their relative fair values at the date of the sale. Mortgage servicing rights are included in other assets and are amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying mortgage loans. In addition, mortgage servicing rights are evaluated for impairment at each reporting date based on the fair value of those rights. For purposes of measuring impairment, the rights are stratified by loan type, term and interest rate. The amount of impairment recognized, through a valuation allowance, is the amount by which the mortgage servicing rights for a stratum exceed their fair value.
Restricted equity securities	Restricted equity securities: As a member of the Federal Home Loan Bank of Pittsburgh (“FHLB”), the Company is required to purchase and hold stock in the FHLB to satisfy membership and borrowing requirements. This stock is restricted in that it can only be redeemed by the FHLB or transferred to another member institution, and all redemptions of FHLB stock must be at par. As a result of these restrictions, FHLB stock is unlike other investment securities as there is no trading market for FHLB stock and the transfer price is determined by FHLB membership rules and not by market participants. The carrying value of restricted stock is included in other assets.
Bank owned life insurance	Bank owned life insurance: The Company invests in bank owned life insurance (“BOLI”) as a source of funding for employee benefit expenses. BOLI involves the purchasing of life insurance on certain employees. The Company is the owner and beneficiary of the policies. This life insurance investment is carried at the cash surrender value of the underlying policies. Income from increases in cash surrender value of the policies is included in noninterest income. The policies can be liquidated, if necessary, with associated tax costs. However, the Company intends to hold these policies and, accordingly, the Company has not provided for income taxes on the earnings from the increase in cash surrender value.
Pension and post-retirement benefit plans	Pension and post-retirement benefit plans: The Company sponsors a separate Employee Stock Ownership Plan (“ESOP”) and Retirement Profit Sharing 401(k) Plan and maintains Supplemental Executive Retirement Plans (“SERPs”) and an employee pension plan, which is currently frozen. The Company also provides post-retirement benefit plans other than pensions, consisting principally of life insurance benefits, to eligible retirees. The liabilities and annual income or expense of the Company’s pension and other post-retirement benefit plans are determined using methodologies that involve several actuarial assumptions, the most significant of which are the discount rate and the long-term rate of asset return, based on the market-related value of assets. The fair values of plan assets are determined based on prevailing market prices or estimated fair value for investments with no available quoted prices.
Statements of Cash Flows	Statements of Cash Flows: Cash and cash equivalents include cash on hand, cash items in the process of collection, noninterest-bearing and interest-bearing deposits in other banks and federal funds sold.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities: The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain of its risk, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. ​ The Company has elected to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.
Fair value of financial instruments	Fair value of financial instruments: The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosure under GAAP. Fair value estimates are calculated without attempting to estimate the value of anticipated future business and the value of certain assets and liabilities that are not considered financial. Accordingly, such assets and liabilities are excluded from disclosure requirements. Fair value is the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. 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. In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets. In many cases, these values cannot be realized in immediate settlement of the instrument. Current fair value guidance provides a consistent definition of fair value, which focuses on exit price in an orderly transaction that is not a forced liquidation or distressed sale between participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. In accordance with GAAP, the Company groups its assets and liabilities generally measured at fair value into three levels based on market information or other fair value estimates in which the assets and liabilities are traded or valued and the reliability of the assumptions used to determine fair value. These levels include: ● Level 1: Unadjusted quoted prices of identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. ● Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. ● Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. The following methods and assumptions were used by the Company to construct the summary table in Note 14 containing the fair values and related carrying amounts of financial instruments measured at fair value:
Investment securities	Investment securities: The fair values of marketable equity securities are based on quoted market prices from active exchange markets. The fair values of debt securities are based on pricing from a matrix pricing model and quoted market prices.
Impaired loans	Impaired loans:
Interest rate swaps and floors	Interest rate swaps and floors:
Advertising	Advertising: The Company follows the policy of charging marketing and advertising costs to expense as incurred. Advertising expense for the years ended December 31, 2020, 2019 and 2018 was $462, $873 and $720, respectively.
Income taxes	Income taxes: Deferred income taxes are provided on the balance sheet method whereby deferred tax assets are recognized for deductible temporary differences and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax basis. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion of the deferred tax assets will not be realized. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the effective date. A tax position is recognized as a benefit only if it is more likely than not that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that has a likelihood of being realized on examination of more than 50 percent. For tax positions not meeting the more likely than not threshold, no tax benefit is recorded. Under the more likely than not threshold guidelines, the Company believes no significant uncertain tax positions exist, either individually or in the aggregate, that would give rise to the non-recognition of an existing tax benefit. The Company had no material unrecognized tax benefits or accrued interest and penalties for any year in the three-year period ended December 31, 2020. As applicable, the Company recognizes accrued interest and penalties assessed as a result of a taxing authority examination through income tax expense. The Company files consolidated income tax returns in the United States of America and various state jurisdictions. With limited exception, the Company is no longer subject to federal and state income tax examinations by taxing authorities for years before 2017.
Other comprehensive income (loss)	Other comprehensive income (loss): The components of other comprehensive income (loss) and their related tax effects are reported in the consolidated statements of income and comprehensive income. The accumulated other comprehensive income (loss) included in the Consolidated Balance Sheets relates to net unrealized gains and losses on investment securities available-for-sale, the net change in derivative fair value and the unfunded benefit plan amounts which include prior service costs and unrealized net losses.
Earnings per share	Earnings per share: Basic earnings per share represent income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company relate to awards of restricted stock units, and are determined using the treasury stock method. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 For the Year Ended December 31 ​ Basic ​ Diluted ​ Basic ​ Diluted ​ Basic ​ Diluted Net income $ 29,354 $ 29,354 $ 25,736 ​ $ 25,736 $ 24,920 $ 24,920 ​ Average common shares outstanding ​ 7,304,956 ​ 7,337,843 ​ 7,395,429 ​ 7,412,369 ​ 7,397,797 ​ 7,402,900 ​ Earnings per share ​ $ 4.02 ​ $ 4.00 ​ $ 3.48 ​ $ 3.47 ​ $ 3.37 ​ $ 3.37 ​
Stock-based compensation	Stock-based compensation: The Company recognizes all share-based payments to employees in the consolidated statements of income and comprehensive income based on their fair values. The fair value of such equity instruments is recognized as an expense in the consolidated financial statements as services are performed. The Company has granted restricted stock awards and units to employees at a price equal to the fair value of the shares underlying the awards at the date of grant. The fair value of restricted stock awards and units are equivalent to the fair value on the date of grant and is amortized over the vesting period.
Recent accounting standards	Recent accounting standards: In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, “Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This ASU will have a material impact on the Company’s calculation and accounting for its allowance for loan losses as well as credit losses related to investment securities available-for-sale. A summary of significant provisions of this ASU is as follows: ● The ASU requires that a financial asset (or a group of financial assets) measured at amortized cost basis be presented, net of a valuation allowance for credit losses, at an amount expected to be collected on the financial asset(s), and that the income statement include the measurement of credit losses for newly recognized financial assets as well as changes in expected losses on previously recognized financial assets. The provisions of this ASU require measurement of expected credit losses based on relevant information including past events, historical experience, current conditions, and reasonable and supportive forecasts that affect the collectability of the asset. The provisions of this ASU differ from current GAAP in that current GAAP generally delays recognition of the full amount of credit losses until the loss is probable of occurring. ● The amendments in the ASU retain many of the disclosure requirements related to credit quality in current GAAP, updated to reflect the change from an incurred loss methodology to an expected credit loss methodology. In addition, the ASU requires that disclosure of credit quality indicators in relation to the amortized cost of financing receivables, a current requirement, be further disaggregated by year of origination. ● This ASU requires that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down, and limits the amount of the allowance for credit losses to the amount by which the fair value is below amortized cost. For purchased investment securities available-for-sale with a more-than-insignifcant amount of credit deterioration since origination, the ASU requires an allowance be determined in a manner similar to other investment securities available-for-sale; however, the initial allowance would be added to the purchase price, with only subsequent changes in the allowance recorded in credit loss expense, and interest income recognized at the effective rate excluding the discount embedded in the purchase price related to estimated credit losses at acquisition. ● In November 2019, the FASB voted to defer the adoption date for smaller reporting companies from 2020 to 2023. The Company qualified as a smaller reporting company at that time and therefore guidance is effective for the Company in 2023. The Company will record the effect of implementing this ASU through a cumulative-effect adjustment through retained earnings as of the beginning of the reporting period in which Topic 326 is effective. ​ We are evaluating the impact of the ASU on our consolidated financial statements. In addition to our allowance for loan losses, we will also record an allowance for credit losses on debt securities instead of applying the impairment model currently utilized. The amount of the adjustments will be impacted by each portfolio’s composition and credit quality at the adoption date as well as economic conditions and forecasts at that time. ​ In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” - Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The amendments in this ASU simplify how an entity is required to test goodwill for impairment by eliminating the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. The Company adopted this guidance effective January 1, 2020. Adoption of this ASU did not have a material impact on the Company’s consolidated financial statements. ​ In August 2018, the FASB issued ASU 2018-14, “Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20)”, which provides changes to the disclosure requirements for defined benefit plans. The amended guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments are a result of the disclosure framework project that focuses on improvements to the effectiveness of disclosures in the notes to financial statements. The amendments remove and add certain disclosure requirements. The disclosure requirements being removed relating to public companies are (1) the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year, (2) the amount and timing of plan assets expected to be returned to the employer, (3) the 2001 disclosure requirement relating to Japanese Welfare Pension Insurance Law, (4) related party disclosures about the amount of future annual benefits covered by insurance, and (5) the effects of a one-percentage-point change in assumed health care cost trends on the benefit cost and obligation. The disclosure requirements being added relating to public companies are (1) the weighted-average interest crediting rates for cash balance plans, and (2) an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. The Company adopted this guidance effective January 1, 2020. Adoption of this ASU did not have a material impact on its disclosures to the consolidated financial statements. ​ In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes”, which aims to simplify the accounting for income taxes by removing certain exceptions to the general principles and also simplification of areas such as franchise taxes, step-up in tax basis goodwill, separate entity financial statements and interim recognition of enactment of tax laws or rate changes. The ASU will be effective for the Company on January 1, 2021. The Company is currently evaluating the potential impact of ASU 2019-12 on the consolidated financial statements. ​ In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting”, which provides optional expedients and exceptions for a limited time period to ease the potential burden in accounting for reference rate reform on financial reporting. The amendments in ASU 2020-04 are elective for entities with contracts, including derivative contracts, that reference LIBOR or some other reference rate that are expected to be discontinued. For the Company's cash flow hedges, ASU 2020-04 allows: (i) an entity to change the reference rate without having to designate the hedging relationship; (ii) for cash flow hedges in which the designated hedged risk is LIBOR, allows an entity to assert that it remains probable that the hedged forecasted transaction will occur; and (iii) allows an entity to change the designated method used to assess hedge effectiveness and simplifies or temporarily suspends the assessment of hedge effectiveness for hedging relationships. ASU 2020-04 must be applied prospectively and was effective immediately upon issuance and remains effective through December 31, 2022. ​ The Company adopted the amendments in ASU 2020-04 as of the March 12, 2020 issuance date, on a prospective basis. The adoption did not have an immediate direct impact to the consolidated financial statements. As contracts are modified through December 2022, we will assess the impact based on this guidance. The Company does not expect there will be a material impact to the consolidated financial statements. ​ In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs. ASU 2020-08 clarifies that the Company should reevaluate whether a callable debt security is within the scope of the guidance of premium amortization of purchased callable debt securities, at each reporting date. If there is no remaining premium or if there are no further call dates the Company shall reset the effective yield using the payment terms of the debt security. ASU 2020-08 is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2020 and early application is not permitted. The guidance is not expected to have a material impact on the consolidated financial statements.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2020
Summary of significant accounting policies
Schedule of estimated useful life of related assets	​ ​ ​ ​ ​ Premises and leasehold improvements 7 ​ Furniture, fixtures and equipment 3 ​
Schedule of earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ 2019 ​ 2018 For the Year Ended December 31 ​ Basic ​ Diluted ​ Basic ​ Diluted ​ Basic ​ Diluted Net income $ 29,354 $ 29,354 $ 25,736 ​ $ 25,736 $ 24,920 $ 24,920 ​ Average common shares outstanding ​ 7,304,956 ​ 7,337,843 ​ 7,395,429 ​ 7,412,369 ​ 7,397,797 ​ 7,402,900 ​ Earnings per share ​ $ 4.02 ​ $ 4.00 ​ $ 3.48 ​ $ 3.47 ​ $ 3.37 ​ $ 3.37 ​

Investment securities (Tables)

Investment securities (Tables)	12 Months Ended
	Dec. 31, 2020
Investment Securities
Schedule of amortized cost and fair value of investment securities aggregated by investment category	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair December 31, 2020 Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 18,478 ​ $ 427 ​ ​ ​ ​ $ 18,905 ​ U.S. government-sponsored enterprises ​ ​ 63,834 ​ ​ 1,354 ​ ​ ​ ​ ​ 65,188 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 53,297 ​ ​ 2,099 ​ $ 30 ​ 55,366 ​ Tax-exempt ​ 53,977 ​ 3,054 ​ ​ 37 ​ 56,994 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 3,553 ​ 154 ​ ​ ​ ​ 3,707 ​ U.S. government-sponsored enterprises ​ 79,457 ​ 1,930 ​ 136 ​ 81,251 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 12,619 ​ 881 ​ ​ ​ 13,500 ​ Corporate debt securities ​ ​ 1,000 ​ ​ ​ ​ ​ ​ ​ ​ 1,000 ​ Total ​ $ 286,215 ​ $ 9,899 ​ $ 203 ​ $ 295,911 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 6,849 ​ $ 275 ​ $ ​ ​ $ 7,124 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 21 ​ ​ ​ ​ ​ ​ 21 ​ U.S. government-sponsored enterprises ​ 355 ​ 13 ​ ​ ​ ​ 368 ​ Total ​ $ 7,225 ​ $ 288 ​ $ ​ ​ $ 7,513 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair December 31, 2019 Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 23,966 ​ $ 162 ​ ​ ​ ​ $ 24,128 ​ U.S. government-sponsored enterprises ​ ​ 87,156 ​ ​ 181 ​ $ 227 ​ 87,110 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 35,418 ​ 295 ​ 815 ​ 34,898 ​ Tax-exempt ​ 59,127 ​ 1,056 ​ 20 ​ 60,163 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 8,368 ​ 112 ​ 10 ​ 8,470 ​ U.S. government-sponsored enterprises ​ 101,914 ​ 1,011 ​ 77 ​ 102,848 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ ​ 12,694 ​ ​ 171 ​ ​ 4 ​ ​ 12,861 ​ Total ​ $ 328,643 ​ $ 2,988 ​ $ 1,153 ​ $ 330,478 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 6,852 ​ $ 208 ​ $ ​ ​ $ 7,060 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ 31 ​ ​ ​ ​ ​ ​ 31 ​ U.S. government-sponsored enterprises ​ 773 ​ 25 ​ ​ ​ ​ 798 ​ Total ​ $ 7,656 ​ $ 233 ​ $ ​ ​ $ 7,889 ​
Schedule of fair value and unrealized losses of investment securities in continuous unrealized loss position	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized December 31, 2020 Value Losses Value Losses Value Losses State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ $ 9,246 ​ $ 30 ​ $ ​ ​ $ ​ ​ $ 9,246 ​ $ 30 ​ Tax-exempt ​ ​ 6,786 ​ ​ 37 ​ ​ ​ ​ ​ ​ ​ ​ 6,786 ​ ​ 37 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ ​ 11,553 ​ ​ 135 ​ ​ 284 ​ ​ 1 ​ ​ 11,837 ​ 136 ​ Total ​ $ 27,585 ​ $ 202 ​ $ 284 ​ $ 1 ​ $ 27,869 ​ $ 203 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than 12 Months ​ 12 Months or More ​ Total ​ ​ Fair ​ Unrealized ​ Fair ​ Unrealized ​ Fair ​ Unrealized December 31, 2019 Value Losses Value Losses Value Losses U.S. government-sponsored enterprises ​ $ 13,695 ​ $ 149 ​ $ 36,070 ​ $ 78 ​ $ 49,765 ​ $ 227 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 23,929 ​ ​ 815 ​ ​ ​ ​ ​ ​ ​ 23,929 ​ 815 ​ Tax-exempt ​ 2,684 ​ 19 ​ ​ 1,098 ​ 1 ​ 3,782 ​ 20 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 992 ​ 1 ​ ​ 2,362 ​ ​ 9 ​ 3,354 ​ 10 ​ U.S. government-sponsored enterprises ​ 36,939 ​ ​ 51 ​ ​ 3,751 ​ ​ 30 ​ ​ 40,690 ​ ​ 81 ​ Total ​ $ 78,239 ​ $ 1,035 ​ $ 43,281 ​ $ 118 ​ $ 121,520 ​ $ 1,153 ​
Summary of unrealized and realized gains and losses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, ​ 2020 ​ 2019 Net gain (loss) recognized during the period on equity securities ​ $ (6) ​ $ 132 Less: Net gain (loss) recognized during the period on equity securities sold during the period ​ 29 ​ ​ Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date ​ $ (35) ​ $ 132
Available-for-Sale Securities.
Investment Securities
Schedule of maturity distribution of fair value	​ ​ ​ ​ ​ ​ ​ ​ Fair December 31, 2020 Value Within one year ​ $ 37,351 ​ After one but within five years ​ 49,444 ​ After five but within ten years ​ 22,799 ​ After ten years ​ 84,357 ​ ​ ​ 193,951 ​ Mortgage-backed and other amortizing securities ​ 101,960 ​ Total ​ $ 295,911 ​
Held-to-maturity Securities.
Investment Securities
Schedule of maturity distribution of fair value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair December 31, 2020 Cost Value Within one year ​ $ 175 ​ $ 178 ​ After five but within ten years ​ ​ 324 ​ ​ 344 ​ After ten years ​ ​ 6,350 ​ ​ 6,602 ​ ​ ​ 6,849 ​ 7,124 ​ Mortgage-backed securities ​ 376 ​ 389 ​ Total ​ $ 7,225 ​ $ 7,513 ​

Loans, net and allowance for _2

Loans, net and allowance for loan losses (Tables)	12 Months Ended
	Dec. 31, 2020
Loans, net and allowance for loan losses
Schedule of major classifications of loans outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Commercial ​ $ 679,286 ​ $ 522,957 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,137,990 ​ 1,011,423 ​ Residential ​ 277,414 ​ 301,378 ​ Consumer ​ 83,292 ​ 102,482 ​ Total ​ $ 2,177,982 ​ $ 1,938,240 ​
Schedule of changes in allowance for loan losses account by major classification of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2020 ​ Commercial ​ Commercial ​ Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning balance ​ $ 6,888 ​ $ 11,496 ​ $ 3,226 ​ $ 1,067 ​ $ 22,677 ​ Charge-offs ​ (2,771) ​ (144) ​ (247) ​ (317) ​ (3,479) ​ Recoveries ​ 525 ​ 16 ​ 57 ​ 148 ​ 746 ​ Provisions ​ 4,092 ​ 3,191 ​ 93 ​ 24 ​ 7,400 ​ Ending balance ​ $ 8,734 ​ $ 14,559 ​ $ 3,129 ​ $ 922 ​ $ 27,344 ​ Ending balance: individually evaluated for impairment ​ 947 ​ 180 ​ 75 ​ ​ ​ 1,202 ​ Ending balance: collectively evaluated for impairment ​ $ 7,787 ​ $ 14,379 ​ $ 3,054 ​ $ 922 ​ $ 26,142 ​ Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 679,286 ​ $ 1,137,990 ​ $ 277,414 ​ $ 83,292 ​ $ 2,177,982 ​ Ending balance: individually evaluated for impairment ​ 4,297 ​ 3,952 ​ 1,546 ​ ​ 111 ​ 9,906 ​ Ending balance: collectively evaluated for impairment ​ $ 674,989 ​ $ 1,134,038 ​ $ 275,868 ​ $ 83,181 ​ $ 2,168,076 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ December 31, 2019 ​ Commercial ​ Commercial ​ Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning balance ​ $ 5,516 ​ $ 10,736 ​ $ 3,892 ​ $ 1,235 ​ $ 21,379 Charge-offs ​ (3,314) ​ (817) ​ (477) ​ (459) ​ (5,067) Recoveries ​ 69 ​ 1 ​ 29 ​ 166 ​ 265 Provisions ​ 4,617 ​ 1,576 ​ (218) ​ 125 ​ 6,100 Ending balance ​ $ 6,888 ​ $ 11,496 ​ $ 3,226 ​ $ 1,067 ​ $ 22,677 Ending balance: individually evaluated for impairment ​ 363 ​ 279 ​ 135 ​ ​ ​ 777 Ending balance: collectively evaluated for impairment ​ $ 6,525 ​ $ 11,217 ​ $ 3,091 ​ $ 1,067 ​ $ 21,900 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 522,957 ​ $ 1,011,423 ​ $ 301,378 ​ $ 102,482 ​ $ 1,938,240 Ending balance: individually evaluated for impairment ​ 4,658 ​ 3,048 ​ 2,153 ​ ​ 261 ​ 10,120 Ending balance: collectively evaluated for impairment ​ $ 518,299 ​ $ 1,008,375 ​ $ 299,225 ​ $ 102,221 ​ $ 1,928,120 Real estate
Schedule of major classification of loans portfolio summarized by credit quality	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 Pass Mention Substandard Doubtful Total Commercial ​ $ 660,559 ​ $ 14,305 ​ $ 4,422 ​ $ ​ ​ $ 679,286 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,107,699 ​ 17,517 ​ 12,774 ​ ​ ​ ​ 1,137,990 ​ Residential ​ 274,327 ​ 144 ​ 2,943 ​ ​ ​ ​ 277,414 ​ Consumer ​ 83,215 ​ ​ ​ 77 ​ ​ ​ ​ 83,292 ​ Total ​ $ 2,125,800 ​ $ 31,966 ​ $ 20,216 ​ $ ​ ​ $ 2,177,982 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2019 Pass Mention Substandard Doubtful Total Commercial ​ $ 513,994 ​ $ 3,837 ​ $ 5,126 ​ $ ​ ​ $ 522,957 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 993,645 ​ 2,508 ​ 15,270 ​ ​ ​ ​ 1,011,423 ​ Residential ​ 298,449 ​ 597 ​ 2,332 ​ ​ ​ ​ 301,378 ​ Consumer ​ 102,145 ​ ​ ​ 337 ​ ​ ​ ​ 102,482 ​ Total ​ $ 1,908,233 ​ $ 6,942 ​ $ 23,065 ​ $ ​ ​ $ 1,938,240 ​
Schedule of information concerning nonaccrual loans by major loan classification	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Commercial ​ $ 3,822 ​ $ 3,336 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,262 ​ 2,765 ​ Residential ​ 922 ​ 1,148 ​ Consumer ​ 111 ​ 261 ​ Total ​ $ 8,117 ​ $ 7,510 ​
Schedule of major classifications of loans by past due status	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and December 31, 2020 ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 73 ​ ​ ​ ​ $ 3,822 ​ $ 3,895 ​ $ 675,391 ​ $ 679,286 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 344 ​ $ 134 ​ 3,262 ​ 3,740 ​ 1,134,250 ​ 1,137,990 ​ ​ ​ ​ Residential ​ 2,072 ​ 480 ​ ​ 993 ​ 3,545 ​ 273,869 ​ 277,414 ​ $ 71 ​ Consumer ​ 374 ​ 63 ​ 111 ​ 548 ​ 82,744 ​ 83,292 ​ ​ ​ Total ​ $ 2,863 ​ $ 677 ​ $ 8,188 ​ $ 11,728 ​ $ 2,166,254 ​ $ 2,177,982 ​ $ 71 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and December 31, 2019 ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 75 ​ ​ ​ ​ $ 3,036 ​ $ 3,111 ​ $ 519,846 ​ $ 522,957 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 926 ​ $ 175 ​ 2,765 ​ 3,866 ​ 1,007,557 ​ 1,011,423 ​ ​ ​ ​ Residential ​ 2,164 ​ 1,227 ​ 1,526 ​ 4,917 ​ 296,461 ​ 301,378 ​ $ 378 ​ Consumer ​ 523 ​ 123 ​ 261 ​ 907 ​ 101,575 ​ 102,482 ​ ​ ​ Total ​ $ 3,688 ​ $ 1,525 ​ $ 7,588 ​ $ 12,801 ​ $ 1,925,439 ​ $ 1,938,240 ​ $ 378 ​
Summarized information concerning impaired loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income December 31, 2020 Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 2,251 ​ $ 3,421 ​ ​ ​ ​ $ 2,915 ​ $ 30 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,372 ​ 2,964 ​ ​ ​ ​ 2,148 ​ 28 ​ Residential ​ 1,086 ​ 1,263 ​ ​ ​ ​ 1,223 ​ 21 ​ Consumer ​ 111 ​ 121 ​ ​ ​ ​ 167 ​ ​ ​ ​ Total ​ 5,820 ​ 7,769 ​ ​ ​ ​ 6,453 ​ 79 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,046 ​ 2,094 ​ ​ 947 ​ 2,038 ​ 17 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,580 ​ 1,710 ​ 180 ​ 1,687 ​ 36 ​ Residential ​ 460 ​ 482 ​ 75 ​ 624 ​ 13 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 4,086 ​ 4,286 ​ 1,202 ​ 4,349 ​ 66 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,297 ​ 5,515 ​ 947 ​ 4,953 ​ 47 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,952 ​ 4,674 ​ 180 ​ 3,835 ​ 64 ​ Residential ​ 1,546 ​ 1,745 ​ 75 ​ 1,847 ​ 34 ​ Consumer ​ 111 ​ 121 ​ ​ ​ 167 ​ ​ ​ Total ​ $ 9,906 ​ $ 12,055 ​ $ 1,202 ​ $ 10,802 ​ $ 145 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income December 31, 2019 Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 3,638 ​ $ 4,175 ​ ​ ​ ​ $ 3,907 ​ $ 63 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,918 ​ 2,205 ​ ​ ​ ​ 2,385 ​ 38 ​ Residential ​ 1,718 ​ 2,060 ​ ​ ​ ​ 1,362 ​ 25 ​ Consumer ​ 261 ​ 274 ​ ​ ​ ​ 233 ​ ​ ​ ​ Total ​ 7,535 ​ 8,714 ​ ​ ​ ​ 7,887 ​ 126 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,020 ​ 1,038 ​ ​ 363 ​ 1,012 ​ 32 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,130 ​ 1,811 ​ 279 ​ 1,050 ​ 10 ​ Residential ​ 435 ​ 450 ​ 135 ​ 1,408 ​ 29 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ 20 ​ ​ ​ Total ​ 2,585 ​ 3,299 ​ 777 ​ 3,490 ​ 71 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,658 ​ 5,213 ​ 363 ​ 4,919 ​ 95 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,048 ​ 4,016 ​ 279 ​ 3,435 ​ 48 ​ Residential ​ 2,153 ​ 2,510 ​ 135 ​ 2,770 ​ 54 ​ Consumer ​ 261 ​ 274 ​ ​ ​ 253 ​ ​ ​ Total ​ $ 10,120 ​ $ 12,013 ​ $ 777 ​ $ 11,377 ​ $ 197 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Year Ended ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income December 31, 2018 Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 1,562 ​ $ 1,900 ​ ​ ​ ​ $ 1,318 ​ $ 67 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,969 ​ 2,299 ​ ​ ​ ​ 2,822 ​ ​ 28 ​ Residential ​ 1,970 ​ 2,658 ​ ​ ​ ​ 2,193 ​ ​ 22 ​ Consumer ​ 152 ​ 160 ​ ​ ​ ​ 135 ​ ​ ​ ​ Total ​ 5,653 ​ 7,017 ​ ​ ​ ​ 6,468 ​ ​ 117 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 675 ​ 675 ​ $ 50 ​ 1,006 ​ ​ 30 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,152 ​ 1,323 ​ 403 ​ 1,676 ​ 18 ​ Residential ​ 2,101 ​ 2,328 ​ 666 ​ 1,585 ​ 22 ​ Consumer ​ ​ 60 ​ ​ 60 ​ ​ 60 ​ ​ 21 ​ ​ ​ ​ Total ​ 3,988 ​ 4,386 ​ 1,179 ​ 4,288 ​ 70 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,237 ​ 2,575 ​ 50 ​ 2,324 ​ 97 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,121 ​ 3,622 ​ 403 ​ 4,498 ​ 46 ​ Residential ​ 4,071 ​ 4,986 ​ 666 ​ 3,778 ​ 44 ​ Consumer ​ 212 ​ 220 ​ ​ 60 ​ 156 ​ ​ ​ ​ Total ​ $ 9,641 ​ $ 11,403 ​ $ 1,179 ​ $ 10,756 ​ $ 187 ​
Summary loans whose terms have been modified resulting in troubled debt restructurings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification Post-Modification ​ ​ ​ ​ Number ​ Outstanding Recorded ​ Outstanding ​ Recorded December 31, 2020 ​ of Contracts ​ Investment ​ Recorded Investment ​ Investment Commercial ​ 1 ​ $ 12 ​ $ 12 ​ $ 5 ​ Commercial real estate 3 ​ ​ 1,073 ​ ​ 1,073 ​ ​ 1,046 ​ Total 4 ​ $ 1,085 ​ $ 1,085 ​ $ 1,051 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification Post-Modification ​ ​ ​ ​ Number ​ Outstanding Recorded ​ Outstanding ​ Recorded December 31, 2019 ​ of Contracts ​ Investment ​ Recorded Investment ​ Investment Commercial real estate 1 ​ $ 346 ​ $ 346 ​ $ 241 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pre-Modification Post-Modification ​ ​ ​ ​ ​ Number ​ Outstanding Recorded ​ Outstanding ​ Recorded ​ December 31, 2018 ​ of Contracts ​ Investment ​ Recorded Investment ​ Investment ​ Commercial real estate 1 ​ $ 340 ​ $ 340 ​ $ 340 ​
Schedule of payment deferrals granted on commercial loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Percentage ​ ​ Percentage ​ ​ ​ Number ​ ​ ​ ​ of Total ​ ​ of Tier 1 ​ ​ ​ of ​ ​ ​ ​ Loan ​ ​ Capital ​ December 31, 2020 NAICS category ​ Loans ​ ​ Balance ​ Portfolio ​ ​ (Bank) ​ Lessors of Residential Buildings and Dwellings ​ 3 ​ $ 143 ​ ​ ​ ​ 0.1 % Full-Service Restaurants ​ 3 ​ ​ 1,961 ​ 0.1 % ​ 0.8 ​ General Automotive Repair ​ 1 ​ ​ 1,459 ​ 0.1 ​ ​ 0.6 ​ School and Employee Bus Transportation ​ 1 ​ ​ 725 ​ ​ ​ ​ 0.3 ​ All Others ​ 10 ​ ​ 1,508 ​ 0.1 ​ ​ 0.6 ​ ​ ​ 18 ​ $ 5,796 ​ 0.3 % ​ 2.3 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Percentage ​ ​ Percentage ​ ​ ​ Number ​ ​ ​ ​ of Total ​ ​ of Tier 1 ​ ​ ​ of ​ ​ ​ ​ Loan ​ ​ Capital ​ 2020 NAICS category ​ Loans ​ ​ Balance ​ Portfolio ​ ​ (Bank) ​ Lessors of Nonresidential Buildings ​ 65 ​ $ 71,899 ​ 3.3 % ​ 26.9 % Lessors of Residential Buildings and Dwellings ​ 64 ​ ​ 53,564 ​ 2.5 ​ ​ 19.9 ​ Hotels and Motels ​ 27 ​ ​ 39,261 ​ 1.8 ​ ​ 14.5 ​ Full-Service Restaurants ​ 33 ​ ​ 27,783 ​ 1.3 ​ ​ 10.3 ​ Limited-Service Restaurants ​ 8 ​ ​ 11,829 ​ 0.5 ​ ​ 4.4 ​ Gasoline Stations with Convenience Stores ​ 18 ​ ​ 12,422 ​ 0.6 ​ ​ 4.6 ​ Construction and Mining ​ 13 ​ ​ 9,718 ​ 0.4 ​ ​ 3.6 ​ Assisted Living Facilities for the Elderly ​ 2 ​ ​ 6,319 ​ 0.3 ​ ​ 2.3 ​ Colleges, Universities, and Professional Schools ​ 1 ​ ​ 6,301 ​ 0.3 ​ ​ 2.3 ​ All Others ​ 248 ​ ​ 67,674 ​ 3.1 ​ ​ 24.9 ​ ​ ​ 479 ​ $ 306,770 ​ 14.1 % ​ 113.7 %

Off-balance sheet financial i_2

Off-balance sheet financial instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Off-balance sheet financial instruments.
Summary of contractual amounts of off-balance sheet commitments	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 Commitments to extend credit ​ $ 336,667 ​ $ 290,517 ​ Unused portions of lines of credit ​ 55,391 ​ 52,168 ​ Standby letters of credit ​ 34,428 ​ 45,018 ​ ​ ​ $ 426,486 ​ $ 387,703 ​

Premises and equipment, net (Ta

Premises and equipment, net (Tables)	12 Months Ended
	Dec. 31, 2020
Premises and equipment, net
Summary of premises and equipment	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 Land ​ $ 5,217 ​ $ 5,535 ​ Premises and leasehold improvements ​ 48,596 ​ 47,705 ​ Right-of-use assets ​ ​ 6,282 ​ ​ 6,125 ​ Furniture, fixtures and equipment ​ 18,395 ​ 17,422 ​ ​ ​ 78,490 ​ 76,787 ​ Less: accumulated depreciation ​ 31,445 ​ 28,855 ​ ​ ​ $ 47,045 ​ $ 47,932 ​

Operating lease commitments a_2

Operating lease commitments and contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Operating lease commitments and contingencies
Summary of future minimum annual rent commitments under various operating leases	​ ​ ​ ​ ​ ​ 2021 $ 611 ​ 2022 ​ 618 ​ 2023 ​ 560 ​ 2024 ​ 488 ​ 2025 ​ 504 ​ Thereafter ​ 5,500 ​ Total future minimum lease payments ​ ​ 8,281 ​ Less amount representing interest ​ ​ (1,856) ​ Present value of future minimum lease payments ​ $ 6,425 ​

Intangible assets, net (Tables)

Intangible assets, net (Tables)	12 Months Ended
	Dec. 31, 2020
Intangible assets, net
Summary of estimated amortization expense on intangible assets	​ ​ ​ ​ ​ ​ 2021 $ 491 ​ 2022 ​ 363 ​ 2023 ​ 106 ​ Total ​ $ 960 ​

Other assets (Tables)

Other assets (Tables)	12 Months Ended
	Dec. 31, 2020
Other assets
Schedule of components of other assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Other real estate owned ​ $ 864 ​ $ 450 ​ Investment in low income housing partnership ​ 6,332 ​ 6,901 ​ Mortgage servicing rights ​ 838 ​ 738 ​ Restricted equity securities (FHLB and other) ​ 5,397 ​ 10,201 ​ Net deferred tax asset ​ ​ 3,768 ​ ​ 3,362 ​ Interest rate floor ​ ​ 1,678 ​ ​ 944 ​ Interest rate swaps ​ ​ 13,693 ​ ​ 4,728 ​ Other assets ​ 6,345 ​ 6,855 ​ Total ​ $ 38,915 ​ $ 34,179 ​ ​ ​ ​ ​ ​ ​ ​ ​

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2020
Deposits.
Summary of major components of interest-bearing and noninterest-bearing deposits	​ ​ ​ ​ ​ ​ ​ ​ ​ At the period end December 31, 2020 December 31, 2019 Interest-bearing deposits: ​ ​ ​ ​ ​ ​ ​ Money market accounts ​ $ 496,634 ​ $ 365,463 ​ Now accounts ​ 567,087 ​ 402,999 ​ Savings accounts ​ 431,224 ​ 370,270 ​ Time deposits less than $250 ​ 221,446 ​ 231,450 ​ Time deposits $250 or more ​ 98,247 ​ 138,069 ​ Total interest-bearing deposits ​ 1,814,638 ​ 1,508,251 ​ Noninterest-bearing deposits ​ 622,475 ​ 463,238 ​ Total deposits ​ $ 2,437,113 ​ $ 1,971,489 ​
Schedule of aggregate amounts of maturities for all time deposits	​ ​ ​ ​ ​ ​ 2021 $ 223,247 ​ 2022 ​ 40,093 ​ 2023 ​ 22,905 ​ 2024 ​ 15,099 ​ 2025 ​ 7,316 ​ Thereafter ​ 11,033 ​ ​ ​ $ 319,693 ​

Short-term borrowings (Tables)

Short-term borrowings (Tables)	12 Months Ended
	Dec. 31, 2020
Short-term borrowings
Summary of short-term borrowings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Weighted ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Average ​ Rate at ​ Balance Balance Balance Rate December 31,2020 FHLB advances ​ $ 50,000 ​ $ 83,716 ​ $ 179,199 1.01 % 0.40 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End ​ Balance Balance Balance the Year of the Year FHLB advances ​ $ 152,150 ​ $ 62,941 ​ $ 152,150 2.61 % 1.84 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End ​ Balance Balance Balance the Year of the Year FHLB advances ​ $ 86,500 ​ $ 133,834 ​ $ 189,275 2.05 % 2.62 %
Schedule of long-term debt consisting of advances	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ Due ​ Fixed ​ ​ ​ December 31, 2020 ​ ​ December 31, 2019 June 2020 1.74 % ​ ​ ​ ​ $ 5,000 ​ June 2020 ​ 2.22 ​ ​ ​ ​ 6,000 ​ December 2020 ​ 1.84 ​ ​ $ ​ ​ 5,000 ​ June 2021 ​ 1.99 ​ ​ ​ 10,000 ​ ​ 10,000 ​ March 2023 ​ 4.69 ​ ​ ​ 4,769 ​ ​ 6,733 ​ ​ ​ ​ ​ ​ $ 14,769 ​ $ 32,733 ​
Schedule of maturities of long-term debt	​ ​ ​ ​ ​ ​ 2021 $ 12,058 ​ 2022 ​ 2,156 ​ 2023 ​ 555 ​ ​ ​ $ 14,769 ​

Long-term debt (Tables)

Long-term debt (Tables)	12 Months Ended
	Dec. 31, 2020
Long-term debt.
Schedule of long-term debt consisting of advances	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ Due ​ Fixed ​ ​ ​ December 31, 2020 ​ ​ December 31, 2019 June 2020 1.74 % ​ ​ ​ ​ $ 5,000 ​ June 2020 ​ 2.22 ​ ​ ​ ​ 6,000 ​ December 2020 ​ 1.84 ​ ​ $ ​ ​ 5,000 ​ June 2021 ​ 1.99 ​ ​ ​ 10,000 ​ ​ 10,000 ​ March 2023 ​ 4.69 ​ ​ ​ 4,769 ​ ​ 6,733 ​ ​ ​ ​ ​ ​ $ 14,769 ​ $ 32,733 ​
Schedule of maturities of long-term debt	​ ​ ​ ​ ​ ​ 2021 $ 12,058 ​ 2022 ​ 2,156 ​ 2023 ​ 555 ​ ​ ​ $ 14,769 ​

Fair value of financial instr_2

Fair value of financial instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Fair value of financial instruments
Schedule of assets and liabilities measured at fair value on a recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2020 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 18,905 $ 18,905 ​ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 65,188 ​ ​ ​ ​ $ 65,188 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 55,366 ​ ​ ​ ​ 55,366 ​ ​ ​ ​ Tax-exempt ​ 56,994 ​ ​ ​ ​ 56,994 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 3,707 ​ ​ ​ ​ 3,707 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 94,751 ​ ​ ​ ​ 94,751 ​ ​ ​ ​ Corporate debt securities ​ ​ 1,000 ​ ​ ​ ​ ​ 1,000 ​ ​ ​ ​ Common equity securities ​ ​ 138 ​ ​ 138 ​ ​ ​ ​ ​ ​ ​ Loan held for sale ​ ​ 837 ​ ​ ​ ​ ​ 837 ​ ​ ​ ​ Interest rate floor-other assets ​ ​ 1,678 ​ ​ ​ ​ ​ 1,678 ​ ​ ​ ​ Interest rate swap-other assets ​ ​ 13,693 ​ ​ ​ ​ ​ 13,693 ​ ​ ​ ​ Interest rate swap-other liabilities ​ ​ (14,099) ​ ​ ​ ​ ​ (14,099) ​ ​ ​ ​ Total ​ $ 298,158 ​ $ 19,043 ​ $ 279,115 ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2019 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 24,128 $ 24,128 ​ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 87,110 ​ ​ ​ ​ $ 87,110 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 34,898 ​ ​ ​ ​ 34,898 ​ ​ ​ ​ Tax-exempt ​ 60,163 ​ ​ ​ ​ 60,163 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 8,470 ​ ​ ​ ​ 8,470 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 115,709 ​ ​ ​ ​ 115,709 ​ ​ ​ ​ Common equity securities ​ 423 ​ ​ 423 ​ ​ ​ ​ ​ ​ ​ Loan held for sale ​ ​ 986 ​ ​ ​ ​ ​ 986 ​ ​ ​ ​ Interest rate floor-other assets ​ ​ 944 ​ ​ ​ ​ ​ 944 ​ ​ ​ ​ Interest rate swap-other assets ​ ​ 4,728 ​ ​ ​ ​ ​ 4,728 ​ ​ ​ ​ Interest rate swap-other liabilities ​ ​ (4,680) ​ ​ ​ ​ ​ (4,680) ​ ​ ​ ​ Total ​ $ 332,879 ​ $ 24,551 ​ $ 308,328 ​ $ ​ ​
Schedule of assets and liabilities measured at fair value on a nonrecurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2020 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 2,884 ​ ​ ​ ​ $ 2,884 ​ Other real estate owned ​ $ 527 ​ ​ ​ ​ ​ ​ ​ $ 527 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant Other ​ Significant ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2019 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 1,808 ​ ​ ​ ​ $ 1,808 ​ Other real estate owned ​ $ 283 ​ ​ ​ ​ ​ ​ ​ $ 283 ​
Schedule of additional quantitative information about assets measured at fair value on a nonrecurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements ​ ​ Fair Value ​ ​ ​ ​ ​ Range December 31, 2020 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 2,884 Appraisal of collateral Appraisal adjustments 9.0% to 97.0% (28.2)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.5)% ​ Other real estate owned ​ $ 527 Appraisal of collateral Appraisal adjustments 3.1% to 58.1% (29.9)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.0)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements ​ ​ Fair Value ​ ​ ​ ​ ​ Range December 31, 2019 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 1,808 Appraisal of collateral Appraisal adjustments 8.6% to 97.0% (54.4)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.2)% ​ Other real estate owned ​ $ 283 Appraisal of collateral Appraisal adjustments 20.0% to 63.6% (43.7)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.0)% ​
Schedule of carrying and fair values of financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable ​ ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs December 31, 2020 Value Value (level 1) (level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 228,192 ​ $ 228,192 ​ $ 228,192 ​ ​ ​ ​ ​ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 295,911 ​ 295,911 ​ ​ 18,905 ​ $ 277,006 ​ ​ ​ ​ Common equity securities ​ ​ 138 ​ ​ 138 ​ ​ 138 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 7,225 ​ 7,513 ​ ​ ​ ​ 7,513 ​ ​ ​ ​ Loans held for sale ​ 837 ​ 837 ​ ​ ​ ​ 837 ​ ​ ​ ​ Net loans ​ 2,150,638 ​ 2,145,752 ​ ​ ​ ​ ​ ​ ​ $ 2,145,752 ​ Accrued interest receivable ​ 8,255 ​ 8,255 ​ ​ ​ ​ 8,255 ​ ​ ​ ​ Mortgage servicing rights ​ 838 ​ 1,269 ​ ​ ​ ​ 1,269 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ ​ 5,397 ​ 5,397 ​ ​ ​ ​ 5,397 ​ ​ ​ ​ Interest rate floor ​ ​ 1,678 ​ ​ 1,678 ​ ​ ​ ​ ​ 1,678 ​ ​ ​ ​ Interest rate swaps ​ 13,693 ​ 13,693 ​ ​ ​ ​ 13,693 ​ ​ ​ ​ Total ​ $ 2,712,802 ​ $ 2,708,635 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 2,437,113 ​ $ 2,441,014 ​ ​ ​ ​ $ 2,441,014 ​ ​ ​ ​ Long-term debt ​ 14,769 ​ 15,073 ​ ​ ​ ​ 15,073 ​ ​ ​ ​ Subordinated debentures ​ 33,000 ​ 33,096 ​ ​ ​ ​ 33,096 ​ ​ ​ ​ Accrued interest payable ​ ​ 736 ​ 736 ​ ​ ​ ​ ​ 736 ​ ​ ​ ​ Interest rate swaps ​ 14,099 ​ 14,099 ​ ​ ​ ​ ​ 14,099 ​ ​ ​ ​ Total ​ $ 2,499,717 ​ $ 2,504,018 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable ​ ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs December 31, 2019 Value Value (level 1) (level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 31,153 ​ $ 31,153 ​ $ 31,153 ​ ​ ​ ​ ​ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 330,478 ​ 330,478 ​ ​ 24,128 ​ $ 306,350 ​ ​ ​ ​ Common equity securities ​ ​ 423 ​ ​ 423 ​ ​ 423 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 7,656 ​ 7,889 ​ ​ ​ ​ 7,889 ​ ​ ​ ​ Loans held for sale ​ 986 ​ 986 ​ ​ ​ ​ 986 ​ ​ ​ ​ Net loans ​ 1,915,563 ​ 1,881,658 ​ ​ ​ ​ ​ ​ ​ $ 1,881,658 ​ Accrued interest receivable ​ 6,981 ​ 6,981 ​ ​ ​ ​ 6,981 ​ ​ ​ ​ Mortgage servicing rights ​ 738 ​ 1,444 ​ ​ ​ ​ 1,444 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ 10,201 ​ 10,201 ​ ​ ​ ​ 10,201 ​ ​ ​ ​ Interest rate floor ​ ​ 944 ​ ​ 944 ​ ​ ​ ​ ​ 944 ​ ​ ​ ​ Interest rate swaps ​ ​ 4,728 ​ ​ 4,728 ​ ​ ​ ​ ​ 4,728 ​ ​ ​ ​ Total ​ $ 2,309,851 ​ $ 2,276,885 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 1,971,489 ​ $ 1,972,084 ​ ​ ​ ​ $ 1,972,084 ​ ​ ​ ​ Long-term debt ​ 32,733 ​ 33,075 ​ ​ ​ ​ 33,075 ​ ​ ​ ​ Accrued interest payable ​ 1,277 ​ 1,277 ​ ​ ​ ​ ​ 1,277 ​ ​ ​ ​ Interest rate swaps ​ ​ 4,680 ​ ​ 4,680 ​ ​ ​ ​ ​ 4,680 ​ ​ ​ ​ Total ​ $ 2,010,179 ​ $ 2,011,116 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Derivatives and hedging activ_2

Derivatives and hedging activities (Tables)	12 Months Ended
	Dec. 31, 2020
Derivatives and hedging activities
Schedule of fair value of derivative financial instruments and balance sheet classification	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Asset Derivatives ​ Asset Derivatives ​ Liability Derivatives ​ Liability Derivatives ​ ​ ​ ​ As of December 31, 2020 ​ As of December 31, 2019 (1) ​ As of December 31, 2020 ​ As of December 31, 2019 (2) ​ Notional Balance Sheet ​ ​ Balance Sheet ​ ​ Balance Sheet ​ ​ Balance Sheet ​ ​ ​ ​ Amount ​ Location ​ Fair Value ​ Location ​ Fair Value ​ Location ​ Fair Value ​ Location ​ Fair Value Derivatives designated as hedging instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Floor $ 25,000 ​ Other Assets ​ $ 1,678 ​ Other Assets ​ $ 944 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap $ 50,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Liabilities ​ $ 485 ​ ​ ​ ​ ​ Total derivatives designated as hedging instruments ​ ​ ​ ​ ​ $ 1,678 ​ ​ ​ $ 944 ​ ​ ​ $ 485 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not ​ ​ ​ ​ ​ ​ Interest Rate Swaps (3) $ 375,341 ​ Other Assets $ 13,693 Other Assets $ 4,728 Other Liabilities $ 13,614 Other Liabilities ​ $ 4,680 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total derivatives not ​ ​ ​ $ 13,693 ​ $ 4,728 ​ $ 13,614 ​ $ 4,680 (1) Assets amount does not include accrued interest receivable of $235 (2) Liabilities amount does not include accrued interest payable of $235 (3) Notional amount of interest rate swaps at December 31, 2019 $172,096 ​
Schedule of effect of fair value and cash flow hedge accounting on accumulated other comprehensive income	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of ​ ​ ​ ​ ​ Amount of ​ ​ Amount of ​ ​ ​ Amount of ​ ​ Amount of ​ ​ Amount of ​ Gain or (Loss) ​ ​ Amount of ​ ​ Gain (Loss) ​ ​ Gain (Loss) ​ ​ ​ Gain (Loss) ​ ​ Gain (Loss) ​ ​ Loss ​ Recognized from ​ ​ Gain (Loss) ​ ​ Reclassified ​ ​ Reclassified ​ ​ ​ Recognized in ​ ​ Recognized in ​ ​ Recognized in ​ Accumulated ​ ​ Reclassified ​ ​ from Accumulated ​ ​ from Accumulated Derivatives in ​ ​ OCI on ​ ​ OCI Included ​ ​ OCI Excluded ​ Other Comprehensive ​ ​ from Accumulated ​ ​ OCI into Income ​ ​ OCI into Income Hedging Derivative Component Component Income into OCI into Income Included Component Excluded Component Relationships ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ December 31, 2020 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap ​ $ 71 ​ $ 71 ​ ​ ​ ​ Interest Expense ​ $ (40) ​ $ (40) ​ ​ ​ Interest Rate Floor (*) ​ $ (18) ​ $ (17) ​ $ (1) ​ Interest Income ​ $ 134 ​ $ 150 ​ $ (16) Total ​ $ 53 ​ $ 54 ​ $ (1) ​ ​ ​ $ 94 ​ $ 110 ​ $ (16) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location of ​ ​ ​ ​ ​ Amount of ​ ​ Amount of ​ ​ ​ Amount of ​ ​ Amount of ​ ​ Amount of ​ Gain or (Loss) ​ ​ Amount of ​ ​ Gain ​ ​ Loss ​ ​ ​ Gain ​ ​ Gain ​ ​ Gain ​ Recognized from ​ ​ Loss ​ ​ Reclassified ​ ​ Reclassified ​ ​ ​ Recognized in ​ ​ Recognized in ​ ​ Recognized in ​ Accumulated ​ ​ Reclassified ​ ​ from Accumulated ​ ​ from Accumulated Derivatives in ​ ​ OCI on ​ ​ OCI Included ​ ​ OCI Excluded ​ Other Comprehensive ​ ​ from Accumulated ​ ​ OCI into Income ​ ​ OCI into Income Hedging ​ Derivative ​ Component ​ Component ​ Income into ​ OCI into Income ​ Included Component ​ Excluded Component Relationships ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ December 31, 2019 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Floor (*) ​ $ 192 ​ $ 196 ​ $ (4) ​ Interest Income ​ $ 26 ​ $ 42 ​ $ (16) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ * Amounts disclosed are gross and not net of taxes.
Schedule of effect of derivative financial instruments on Income Statement	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) Recognized in ​ ​ ​ Income on Fair Value and Cash Flow Hedging ​ ​ ​ Relationships ​ ​ ​ 2020 ​ ​ 2020 ​ ​ 2019 ​ 2019 ​ Interest Income Interest Expense Interest Income Interest Expense Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded ​ $ 134 ​ $ (40) ​ $ 26 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The effects of fair value and cash flow hedging: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gain or (loss) on cash flow hedging relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest contracts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income ​ $ 134 ​ $ (40) ​ $ 26 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component ​ $ 150 ​ ​ ​ ​ $ 42 ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component ​ $ (16) ​ ​ ​ ​ $ (16) ​ ​
Schedule of gain (loss) on derivative instruments not designated as hedging instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of Gain ​ Amount of Loss ​ ​ ​ ​ Recognized in ​ Recognized in ​ ​ Location of Gain or (Loss) ​ Income ​ Income ​ ​ Recognized in Income on ​ Twelve Months Ended ​ Twelve Months Ended Derivatives Not Designated as Hedging Instruments Derivative December 31, 2020 December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Swaps Interest rate swap revenue ​ $ 31 ​ $ 77 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fee Income ​ Interest rate swap revenue ​ $ 2,290 ​ $ 1,713 ​
Schedule of offsetting derivatives	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ Assets Balance Sheet Balance Sheet Instruments Received Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 15,371 ​ $ ​ ​ $ 15,371 ​ $ ​ ​ ​ ​ ​ $ 15,371 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Assets ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Received ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 14,099 ​ $ ​ ​ $ 14,099 ​ $ ​ ​ ​ ​ ​ $ 14,099 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Assets ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Received ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 5,672 ​ $ ​ ​ $ 5,672 ​ $ ​ ​ ​ ​ ​ $ 5,672 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Assets ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Received ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 4,680 ​ $ ​ ​ $ 4,680 ​ $ ​ ​ ​ ​ ​ $ 4,680

Stock plans (Tables)

Stock plans (Tables)	12 Months Ended
	Dec. 31, 2020
Stock plans
Schedule of activity related to restricted stock	​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Nonvested, January 1 25,984 12,892 1,538 ​ Granted shares ​ 16,269 17,345 11,468 ​ Vested shares 8,455 ​ 2,542 ​ 114 ​ Forfeited shares ​ 1,875 ​ 1,711 ​ ​ ​ Nonvested, December 31 31,923 25,984 12,892 ​

Employee benefit plans (Tables)

Employee benefit plans (Tables)	12 Months Ended
	Dec. 31, 2020
Employee benefit plans
Summary of pension and postretirement life insurance plans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits December 31 ​ 2020 ​ 2019 Change in benefit obligation: ​ ​ ​ ​ ​ Benefit obligation, beginning ​ $ 17,491 ​ $ 16,338 ​ Interest cost ​ 544 ​ 639 ​ Change in experience gain ​ (291) ​ 96 ​ Change in actuarial assumptions loss ​ 2,159 ​ 1,221 ​ Benefits paid ​ (790) ​ (803) ​ Benefit obligation, ending ​ 19,113 ​ 17,491 ​ Change in plan assets: ​ ​ ​ ​ ​ ​ ​ Fair value of plan assets, beginning ​ 16,930 ​ 14,919 ​ Actual return on plan assets ​ 1,488 ​ 2,814 ​ Employer contributions ​ ​ ​ ​ ​ Benefits paid ​ (790) ​ (803) ​ Fair value of plan assets, ending ​ 17,628 ​ 16,930 ​ Funded status at end of year ​ $ (1,485) ​ $ (561) ​
Schedule of amounts recognized in balance sheet	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits ​ December 31 ​ 2020 ​ 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities $ 1,485 $ 561 ​ Amounts recognized in the accumulated other comprehensive loss consist of: ​ ​ ​ ​ ​ ​ ​ ​ Net actuarial gain ​ (7,977) ​ (6,579) ​ ​ Deferred taxes ​ 1,675 ​ 1,382 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net amount recognized ​ $ (6,302) ​ $ (5,197) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Schedule of components of net periodic benefit cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Years Ended December 31, ​ 2020 ​ 2019 ​ 2018 Net periodic pension income: ​ ​ ​ ​ ​ ​ ​ Interest cost ​ $ 544 ​ $ 639 ​ $ 623 ​ Expected return on plan assets ​ (1,236) ​ (1,084) ​ (960) ​ Amortization of unrecognized net loss ​ 218 ​ 227 ​ 194 ​ Net periodic pension income: ​ (474) ​ (218) ​ ​ (143) ​ Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loss (gain) ​ 544 ​ 639 ​ (590) ​ Deferred tax ​ (114) ​ (134) ​ 124 ​ Total recognized in other comprehensive income (loss) ​ 430 ​ 505 ​ (466) ​ Total recognized in net period pension cost and other comprehensive income (loss) ​ $ (44) ​ $ 287 ​ $ (609) ​ ​
Schedule of weighted-average assumptions used to determine benefit obligations and related expenses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits ​ December 31, ​ 2020 ​ 2019 ​ 2018 ​ Discount rate: ​ ​ ​ ​ ​ Obligation 2.25 % 3.25 % 4.00 % ​ Expense 3.25 ​ 4.00 ​ 3.75 ​ ​ Expected long-term return on plan assets 7.50 % 7.50 % 7.50 % ​
Schedule of pension plan weighted-average asset allocations	​ ​ ​ ​ ​ ​ ​ December 31, 2020 2019 Asset Category: ​ ​ ​ ​ ​ Cash and cash equivalents 6.8 % 6.2 % Equity securities 63.3 ​ 61.9 ​ Corporate bonds 20.7 ​ 20.6 ​ U.S. government securities 9.2 ​ 11.3 ​ ​ 100.0 % 100.0 %
Schedule of fair value measurement of pension plan assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in ​ ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Significant ​ Significant ​ ​ ​ ​ for Identical ​ Observable ​ Observable ​ ​ ​ ​ Assets ​ Inputs ​ Inputs December 31, 2020 ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Cash and cash equivalents ​ $ 1,203 ​ $ 1,203 ​ ​ ​ $ ​ ​ Equity securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. large cap ​ 10,266 ​ 10,266 ​ ​ ​ ​ ​ ​ ​ International ​ 888 ​ 888 ​ ​ ​ ​ ​ ​ ​ Fixed income securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ 216 ​ ​ ​ ​ $ 216 ​ ​ ​ ​ U.S. government agencies ​ 1,400 ​ ​ ​ ​ 1,400 ​ ​ ​ ​ Corporate bonds ​ 3,655 ​ ​ ​ ​ 3,655 ​ ​ ​ ​ Total ​ $ 17,628 ​ $ 12,357 ​ $ 5,271 ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ Active Markets ​ Significant ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Observable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs December 31, 2019 ​ Total ​ (Level 1) ​ (Level 2) ​ (Level 3) Cash and cash equivalents ​ $ 1,053 ​ $ 1,053 ​ ​ ​ ​ $ ​ ​ Equity securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. large cap ​ 9,663 ​ 9,663 ​ ​ ​ ​ ​ ​ ​ International ​ 817 ​ 817 ​ ​ ​ ​ ​ ​ ​ Fixed income securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ 202 ​ ​ ​ ​ $ 202 ​ ​ ​ ​ U.S. government agencies ​ 1,713 ​ ​ ​ ​ 1,713 ​ ​ ​ ​ Corporate bonds ​ 3,482 ​ ​ ​ ​ 3,482 ​ ​ ​ ​ Total ​ $ 16,930 ​ $ 11,533 ​ $ 5,397 ​ $ ​ ​
Schedule of expected benefit payments	​ ​ ​ ​ ​ ​ ​ Pension Benefits 2021 ​ $ 840 ​ 2022 ​ 878 ​ 2023 ​ 896 ​ 2024 ​ 948 ​ 2025 ​ 970 ​ Thereafter ​ ​ 5,019 ​

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income taxes
Schedule of current and deferred amounts of the provision for income taxes expense (benefit0	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Current ​ $ 6,600 ​ $ 2,761 ​ $ 4,072 ​ Deferred ​ (1,779) ​ 394 ​ (681) ​ Total ​ $ 4,821 ​ $ 3,155 ​ $ 3,391 ​
Schedule of the components of the net deferred tax asset	​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 ​ ​ ​ ​ ​ ​ ​ ​ Deferred tax assets: ​ ​ ​ ​ ​ ​ ​ Allowance for loan losses ​ $ 5,742 ​ $ 4,762 ​ Lease liability ​ ​ 1,349 ​ ​ 1,301 ​ Defined benefit plan ​ 1,108 ​ 815 ​ Deferred compensation ​ 789 ​ 682 ​ Deferred loan fees ​ 1,368 ​ 525 ​ Other ​ 170 ​ 137 ​ Total ​ 10,526 ​ 8,222 ​ Deferred tax liabilities: ​ ​ ​ ​ ​ ​ ​ Lease right-of-use assets ​ ​ 1,319 ​ ​ 1,286 ​ Premises and equipment, net ​ 1,455 ​ 1,350 ​ Merger related accounting ​ 694 ​ ​ 850 ​ Deferred loan costs ​ ​ 936 ​ ​ 716 ​ Investment securities available-for-sale ​ 2,033 ​ 416 ​ Other ​ 321 ​ 242 ​ Total ​ 6,758 ​ 4,860 ​ Net deferred tax asset ​ $ 3,768 ​ $ 3,362 ​
Schedule of the reconciliation between the amount of the effective income tax expense and the income tax expense that would have been provided at the federal statutory rate	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 ​ ​ ​ 2019 ​ ​ ​ 2018 ​ Year Ended December 31 Amount % ​ Amount % ​ Amount ​ % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Federal income tax at statutory rate ​ $ 7,177 ​ 21.00 % ​ $ 6,067 ​ 21.00 % ​ $ 5,945 ​ 21.00 % Effect of federal income tax rate changes (Note 1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax exempt interest ​ (1,032) ​ (3.02) ​ ​ (1,299) ​ (4.50) ​ ​ (1,320) ​ (4.66) ​ Bank owned life insurance income ​ (299) ​ (0.87) ​ ​ (159) ​ (0.55) ​ ​ (236) ​ (0.83) ​ Residential housing program tax credits ​ (1,094) ​ (3.20) ​ ​ ​ (1,094) ​ (3.79) ​ ​ ​ (1,094) ​ (3.87) ​ Other, net ​ 69 ​ 0.19 ​ ​ (360) ​ (1.25) ​ ​ 96 ​ 0.34 ​ Total ​ $ 4,821 ​ 14.10 % ​ $ 3,155 ​ 10.91 % ​ $ 3,391 ​ 11.98 %

Parent Company financial stat_2

Parent Company financial statements (Tables)	12 Months Ended
	Dec. 31, 2020
Parent Company financial statements
Condensed Balance Sheets	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31 2020 2019 Assets: ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 1,069 ​ $ 5,192 ​ Equity securities ​ ​ 138 ​ ​ 423 ​ Investment in bank subsidiary ​ 348,584 ​ 293,415 ​ Other assets ​ 273 ​ 19 ​ Total assets ​ $ 350,064 ​ $ 299,049 ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities and Stockholders’ Equity: ​ ​ ​ ​ ​ ​ ​ Subordinated debt ​ $ 33,000 ​ ​ ​ ​ Accrued interest payable ​ ​ 148 ​ ​ ​ ​ Other liabilities ​ ​ 39 ​ $ 39 ​ Stockholders’ equity ​ 316,877 ​ 299,010 ​ Total liabilities and stockholders’ equity ​ $ 350,064 ​ $ 299,049 ​
Condensed Statements of Income and Comprehensive Income	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Income: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Dividends from subsidiaries ​ $ 10,518 ​ $ 10,131 ​ $ 9,691 ​ Other income ​ ​ 8 ​ ​ 8 ​ ​ 72 ​ Net gain realized on sale of equity securities ​ ​ 29 ​ ​ ​ ​ ​ ​ ​ Unrealized holding gains (losses) on equity securities ​ (35) ​ 132 ​ 13 ​ Total income ​ 10,520 ​ 10,271 ​ 9,776 ​ Expense: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest expense on subordinated debt ​ ​ 1,035 ​ ​ ​ ​ ​ ​ ​ Other expenses ​ 200 ​ 145 ​ 214 ​ Total expenses ​ 1,235 ​ 145 ​ 214 ​ Income before taxes and undistributed income ​ 9,285 ​ 10,126 ​ 9,562 ​ Income tax benefit ​ ​ (255) ​ (1) ​ (27) ​ Income before undistributed income of subsidiaries ​ 9,540 ​ 10,127 ​ 9,589 ​ Equity in undistributed net income of subsidiaries ​ 19,814 ​ 15,609 ​ 15,331 ​ Net income ​ $ 29,354 ​ $ 25,736 ​ $ 24,920 ​
Condensed Statements of Cash Flows	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31 2020 2019 2018 Cash flows from operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 29,354 ​ $ 25,736 ​ $ 24,920 ​ Adjustments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net losses (gains) on investment securities ​ 6 ​ (132) ​ (14) ​ Undistributed net income of subsidiaries ​ (19,814) ​ (15,609) ​ (15,331) ​ Decrease in other assets ​ (255) ​ (302) ​ ​ (106) ​ Increase (decrease) in other liabilities ​ 148 ​ ​ ​ (10) ​ Stock based compensation ​ 570 ​ 554 ​ 272 ​ Increase in due from subsidiaries ​ ​ ​ ​ 1,974 ​ ​ ​ ​ Net cash provided by operating activities ​ 10,009 ​ 12,221 ​ 9,731 ​ Cash flows from investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Purchase of equity securities ​ ​ ​ ​ ​ (234) ​ Sale of equity securities ​ ​ 279 ​ ​ ​ ​ ​ ​ ​ Net cash provided by (used in) investing activities ​ 279 ​ ​ ​ (234) ​ Cash flows used in financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Proceeds from subordinated debt ​ ​ 33,000 ​ ​ ​ ​ ​ ​ ​ Investment in subsidiary ​ ​ (30,000) ​ ​ ​ ​ ​ ​ ​ Retirement of stock ​ (6,893) ​ ​ (634) ​ ​ ​ ​ Cash dividends paid ​ (10,518) ​ (10,131) ​ (9,693) ​ Net cash used in financing activities ​ (14,411) ​ (10,765) ​ (9,693) ​ Increase (decrease) in cash ​ (4,123) ​ 1,456 ​ (196) ​ Cash at beginning of year ​ 5,192 ​ 3,736 ​ 3,932 ​ Cash at end of year ​ $ 1,069 ​ $ 5,192 ​ $ 3,736 ​

Regulatory matters (Tables)

Regulatory matters (Tables)	12 Months Ended
	Dec. 31, 2020
Regulatory matters
Schedule of actual capital ratios and the minimum ratios required for capital adequacy purposes and to be well capitalized under the prompt corrective action provisions	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum to be Well ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capitalized under ​ ​ ​ ​ ​ ​ ​ Minimum For Capital ​ Prompt Corrective ​ ​ Actual ​ Adequacy Purposes ​ Action Provisions December 31, 2020 ​ Amount ​ Ratio ​ Amount ​ Ratio ​ Amount ​ Ratio Common equity Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 250,397 12.16 % $ 92,631 4.50 % ​ ​ ​ ​ ​ Peoples Bank ​ 282,104 13.73 ​ 92,461 4.50 ​ $ 133,554 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ ​ 250,397 12.16 ​ ​ 123,508 6.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 282,104 13.73 ​ 123,281 6.00 ​ ​ 164,374 8.00 ​ Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 310,741 15.10 ​ 164,677 8.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 307,807 14.98 ​ 164,374 8.00 ​ 205,468 10.00 ​ Tier 1 capital to average assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 250,397 9.28 ​ 107,878 4.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ ​ 282,104 10.08 % ​ 111,891 4.00 % ​ 139,864 5.00 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Minimum to be Well ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capitalized under ​ ​ ​ ​ ​ ​ ​ Minimum For Capital ​ Prompt Corrective ​ ​ Actual ​ Adequacy Purposes ​ Action Provisions December 31, 2019 ​ Amount ​ Ratio ​ Amount ​ Ratio ​ Amount ​ Ratio Common equity Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 237,280 11.90 % $ 89,717 4.50 % ​ ​ ​ ​ ​ Peoples Bank ​ 231,685 11.64 ​ 89,576 4.50 ​ $ 129,387 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ ​ 237,280 11.90 ​ ​ 119,623 6.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 231,685 11.64 ​ 119,434 6.00 ​ ​ 159,246 8.00 ​ Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 259,957 13.04 ​ 159,497 8.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ 254,362 12.78 ​ 159,246 8.00 ​ 199,057 10.00 ​ Tier 1 capital to average assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 237,280 10.14 ​ 93,633 4.00 ​ ​ ​ ​ ​ ​ Peoples Bank ​ ​ 231,685 9.91 % ​ 93,508 4.00 % ​ 116,884 5.00 %

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss)
Schedule of components of accumulated other comprehensive loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2020 ​ December 31, 2019 Net unrealized gain on investment securities available-for-sale ​ $ 9,696 ​ $ 1,835 ​ Income tax ​ 2,036 ​ 385 ​ Net of income taxes ​ 7,660 ​ 1,450 ​ Benefit plan adjustments ​ (7,977) ​ (6,579) ​ Income tax benefit ​ (1,675) ​ (1,382) ​ Net of income taxes ​ (6,302) ​ (5,197) ​ Derivative adjustments ​ 1,002 ​ 687 ​ Income tax ​ 211 ​ 144 ​ Net of income taxes ​ 791 ​ 543 ​ Accumulated other comprehensive income (loss) ​ $ 2,149 ​ $ (3,205) ​
Schedule of other comprehensive income (loss) and related tax effects	Other comprehensive income (loss) and related tax effects for the years ended December 31, 2020, 2019 and 2018 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year Ended December 31, 2020 2019 ​ 2018 ​ Unrealized gain (loss) on investment securities available-for-sale ​ $ 8,779 ​ $ 5,109 ​ $ (2,014) ​ Net gain on the sale of investment securities available-for-sale ​ ​ (918) ​ ​ (23) ​ ​ ​ ​ Other comprehensive income on available-for-sale debt securities ​ ​ 7,861 ​ ​ 5,086 ​ ​ (2,014) ​ Benefit plans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortization of actuarial loss (2) ​ ​ 218 ​ ​ 227 ​ ​ 194 ​ Actuarial gain (loss) ​ ​ (1,616) ​ ​ 412 ​ ​ (785) ​ Net change in benefit plan liabilities ​ (1,398) ​ 639 ​ (591) ​ Net change in derivatives ​ ​ 315 ​ ​ 441 ​ ​ 246 ​ Other comprehensive loss before taxes ​ ​ 6,778 ​ ​ 6,166 ​ (2,359) ​ Income tax (benefit) ​ 1,424 ​ 1,295 ​ (496) ​ Other comprehensive income (loss) ​ $ 5,354 ​ $ 4,871 ​ $ (1,863) ​ ​ (1) Represents amounts reclassified out of accumulated comprehensive income (loss) and included in gains on sale of investment securities on the consolidated statements of income and comprehensive income. (2) Represents amounts reclassified out of accumulated comprehensive income (loss) and included in the computation of net periodic pension expense. Refer to Note 17 included in these consolidated financial statements.

Summary of quarterly financia_2

Summary of quarterly financial information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Summary of quarterly financial information (unaudited)
Summary of quarterly financial information	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2020 Quarter Ended ​ March 31 ​ June 30 ​ Sept. 30 ​ Dec. 31 Interest income $ 23,842 $ 23,852 $ 23,346 $ 23,085 ​ Interest expense ​ 4,281 ​ 3,345 ​ 3,422 ​ 3,276 ​ Net interest income ​ 19,561 ​ 20,507 ​ 19,924 ​ 19,809 ​ Provision for loan losses ​ 3,500 ​ 1,800 ​ 1,050 ​ 1,050 ​ Net interest income after provision for loan losses ​ 16,061 ​ 18,707 ​ 18,874 ​ 18,759 ​ Noninterest income ​ 3,550 ​ 3,422 ​ 4,935 ​ 4,735 ​ Noninterest expense ​ 13,651 ​ 13,242 ​ 13,974 ​ 14,001 ​ Income before income taxes ​ 5,960 ​ 8,887 ​ 9,835 ​ 9,493 ​ Income tax expense ​ 679 ​ 1,311 ​ 1,523 ​ 1,308 ​ Net income ​ $ 5,281 ​ $ 7,576 ​ $ 8,312 ​ $ 8,185 ​ Per share data: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income - basic ​ $ 0.72 ​ $ 1.03 ​ $ 1.14 ​ $ 1.13 ​ Net income - diluted ​ ​ 0.71 ​ ​ 1.03 ​ ​ 1.13 ​ ​ 1.13 ​ Cash dividends declared ​ $ 0.36 ​ $ 0.36 ​ $ 0.36 ​ $ 0.36 ​ Average common shares outstanding - basic ​ ​ 7,379,438 ​ ​ 7,341,636 ​ ​ 7,277,189 ​ ​ 7,222,810 ​ Average common shares outstanding - diluted ​ 7,405,703 ​ 7,376,700 ​ 7,312,253 ​ 7,257,874 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2019 Quarter Ended ​ March 31 ​ June 30 ​ Sept. 30 ​ Dec. 31 Interest income $ 22,801 $ 23,332 $ 23,632 $ 23,616 ​ Interest expense ​ 4,504 ​ 4,604 ​ 4,396 ​ 4,364 ​ Net interest income ​ 18,297 ​ 18,728 ​ 19,236 ​ 19,252 ​ Provision for loan losses ​ 1,050 ​ 350 ​ 700 ​ 4,000 ​ Net interest income after provision for loan losses ​ 17,247 ​ 18,378 ​ 18,536 ​ 15,252 ​ Noninterest income ​ 3,416 ​ 4,152 ​ 3,682 ​ 3,870 ​ Noninterest expense ​ 13,490 ​ 14,429 ​ 14,079 ​ 13,644 ​ Income before income taxes ​ 7,173 ​ 8,101 ​ 8,139 ​ 5,478 ​ Income tax expense ​ 761 ​ 957 ​ 991 ​ 446 ​ Net income ​ $ 6,412 ​ $ 7,144 ​ $ 7,148 ​ $ 5,032 ​ Per share data: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income - basic ​ $ 0.87 ​ $ 0.96 ​ $ 0.97 ​ $ 0.68 ​ Net income - diluted ​ ​ 0.87 ​ ​ 0.96 ​ ​ 0.96 ​ ​ 0.68 ​ Cash dividends declared ​ $ 0.34 ​ $ 0.34 ​ $ 0.34 ​ $ 0.35 ​ Average common shares outstanding - basic ​ ​ 7,379,438 ​ ​ 7,399,302 ​ ​ 7,394,992 ​ ​ 7,388,488 ​ Average common shares outstanding - diluted ​ 7,408,536 ​ 7,413,114 ​ 7,417,403 ​ 7,410,899 ​

Summary of significant accoun_4

Summary of significant accounting policies - Nature of operations and Basis of presentation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)Office
Summary of significant accounting policies
Number of full-service community banking offices | Office	26
Reclassification of prior period items amounts effect on net income | $	$ 0

Summary of significant accoun_5

Summary of significant accounting policies - Loans, net (Details)	12 Months Ended
	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable
Debt service coverage ratio	1.2
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable
Maximum loan to value percentage	80.00%
Residential Mortgage | Maximum
Accounts, Notes, Loans and Financing Receivable
Maximum amortization period	30 years

Summary of significant accoun_6

Summary of significant accounting policies - Nonperforming assets and Allowance for loan losses (Details)	12 Months Ended
	Dec. 31, 2020
Summary of significant accounting policies
Non performing loans past due period for Non-accrual status	90 days
Minimum contractual terms of a loan	6 months
Maximum days of consumer loans past due	120 days

Summary of significant accoun_7

Summary of significant accounting policies - Premises and equipment, net (Details)	12 Months Ended
	Dec. 31, 2020
Minimum | Premises and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, estimated useful life	7 years
Minimum | Furniture, fixtures and equipment
Property, Plant and Equipment
Property, plant and equipment, estimated useful life	3 years
Maximum | Premises and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, estimated useful life	40 years
Maximum | Furniture, fixtures and equipment
Property, Plant and Equipment
Property, plant and equipment, estimated useful life	10 years

Summary of significant accoun_8

Summary of significant accounting policies - Goodwill and other intangible assets, net; Advertising (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill
Impairment losses on intangible assets	$ 0	$ 0	$ 0
Advertising expense	$ 462	$ 873	$ 720
Maximum
Goodwill
Finite useful life of intangible assets	10 years

Summary of significant accoun_9

Summary of significant accounting policies - Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary of significant accounting policies
Income tax benefit recognition threshold	50.00%
Unrecognized tax benefit or accrued interest and penalties	$ 0	$ 0	$ 0

Summary of significant accou_10

Summary of significant accounting policies - Earnings per share (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	Dec. 31, 2018
Basic earnings per share
Net income, Basic									$ 29,354	$ 25,736	$ 24,920
Average common shares outstanding - basic	7,222,810	7,277,189	7,341,636	7,379,438	7,388,488	7,394,992	7,399,302	7,379,438	7,304,956	7,395,429	7,397,797
Net income - basic	$ 1.13	$ 1.14	$ 1.03	$ 0.72	$ 0.68	$ 0.97	$ 0.96	$ 0.87	$ 4.02	$ 3.48	$ 3.37
Diluted earnings per share
Net income, Diluted									$ 29,354	$ 25,736	$ 24,920
Average common shares outstanding - diluted	7,257,874	7,312,253	7,376,700	7,405,703	7,410,899	7,417,403	7,413,114	7,408,536	7,337,843	7,412,369	7,402,900
Net income - diluted	$ 1.13	$ 1.13	$ 1.03	$ 0.71	$ 0.68	$ 0.96	$ 0.96	$ 0.87	$ 4	$ 3.47	$ 3.37

Cash and due from banks (Detail

Cash and due from banks (Details) $ in Thousands	Dec. 31, 2019USD ($)
Cash and due from banks
Required reserve balances	$ 2,545

Investment securities - Amortiz

Investment securities - Amortized Cost and Fair Value of Investment Securities Aggregated by Investment Category (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment Securities
Available-for-sale, Amortized Cost	$ 286,215	$ 328,643
Available-for-sale, Gross Unrealized Gains	9,899	2,988
Available-for-sale, Gross Unrealized Losses	203	1,153
Available-for-sale, Fair Value	295,911	330,478
Held-to-maturity, Amortized Cost	7,225	7,656
Held-to-maturity, Gross Unrealized Gains	288	233
Held-to-maturity, Fair value	7,513	7,889
U.S. Treasuries
Investment Securities
Available-for-sale, Amortized Cost	18,478	23,966
Available-for-sale, Gross Unrealized Gains	427	162
Available-for-sale, Fair Value	18,905	24,128
U.S. government-sponsored enterprises state and municipals
Investment Securities
Available-for-sale, Amortized Cost	63,834	87,156
Available-for-sale, Gross Unrealized Gains	1,354	181
Available-for-sale, Gross Unrealized Losses		227
Available-for-sale, Fair Value	65,188	87,110
Mortgage-backed Securities, U.S. government agencies
Investment Securities
Available-for-sale, Amortized Cost	3,553	8,368
Available-for-sale, Gross Unrealized Gains	154	112
Available-for-sale, Gross Unrealized Losses		10
Available-for-sale, Fair Value	3,707	8,470
Held-to-maturity, Amortized Cost	21	31
Held-to-maturity, Fair value	21	31
Mortgage-backed Securities, U.S. government-sponsored enterprises
Investment Securities
Available-for-sale, Amortized Cost	79,457	101,914
Available-for-sale, Gross Unrealized Gains	1,930	1,011
Available-for-sale, Gross Unrealized Losses	136	77
Available-for-sale, Fair Value	81,251	102,848
Held-to-maturity, Amortized Cost	355	773
Held-to-maturity, Gross Unrealized Gains	13	25
Held-to-maturity, Fair value	368	798
Commercial mortgage-backed Securities, U.S. government-sponsored enterprises
Investment Securities
Available-for-sale, Amortized Cost	12,619	12,694
Available-for-sale, Gross Unrealized Gains	881	171
Available-for-sale, Gross Unrealized Losses		4
Available-for-sale, Fair Value	13,500	12,861
Corporate debt securities
Investment Securities
Available-for-sale, Amortized Cost	1,000
Available-for-sale, Fair Value	1,000
State and Municipals, Taxable
Investment Securities
Available-for-sale, Amortized Cost	53,297	35,418
Available-for-sale, Gross Unrealized Gains	2,099	295
Available-for-sale, Gross Unrealized Losses	30	815
Available-for-sale, Fair Value	55,366	34,898
Held-to-maturity, Amortized Cost	6,849
Held-to-maturity, Gross Unrealized Gains	275
Held-to-maturity, Fair value	7,124
State and Municipals, Tax-exempt
Investment Securities
Available-for-sale, Amortized Cost	53,977	59,127
Available-for-sale, Gross Unrealized Gains	3,054	1,056
Available-for-sale, Gross Unrealized Losses	37	20
Available-for-sale, Fair Value	$ 56,994	60,163
Held-to-maturity, Amortized Cost		6,852
Held-to-maturity, Gross Unrealized Gains		208
Held-to-maturity, Fair value		$ 7,060

Investment securities - Unreali

Investment securities - Unrealized and Realized Gains/(Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Investment securities
Unrealized gains (loss), net	$ 7,660	$ 1,450
Net of deferred income taxes	2,036	385
Proceeds from sale of available-for-sale investment securities	64,841	9,677
Gross realized gains	923	66
Gross realized losses	$ 5	$ 43

Investment securities - Equity

Investment securities - Equity Securities Portfolio (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)security	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)
Schedule of Trading Securities and Other Trading Assets [Line Items]
Number of equity securities portfolio consisting of stock of other financial institutions | security	1
Proceeds from sale of equity holdings	$ 279
Gain on sale of equity holdings	29
Equity investments carried at fair value	138		$ 423
Net unrealized gains recognized in AOCI		$ 3
Fair value of equity portfolio in excess of cost basis	15
Common equity securities.
Schedule of Trading Securities and Other Trading Assets [Line Items]
Equity investments carried at fair value	$ 138		$ 423

Investment securities - Unrea_2

Investment securities - Unrealized and realized gains and losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investment securities
Net gain (loss) recognized during the period on equity securities	$ (6)	$ 132	$ 14
Less: Net gains (loss) recognized during the period on equity securities sold during the period	29
Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date	$ (35)	$ 132

Investment securities - Maturit

Investment securities - Maturity Distribution of Debt Securities Classified as Available-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment securities
Within one year	$ 37,351
After one but within five years	49,444
After five but within ten years	22,799
After ten years	84,357
Available for sale securities	193,951
Mortgage-backed and other amortizing securities	101,960
Total	$ 295,911	$ 330,478

Investment securities - Summary

Investment securities - Summary of Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost of Held-to-maturity Securities
Amortized Cost, Within one year, Held to Maturity	$ 175
Amortized Cost, After five but within ten years, Held to maturity	324
Amortized Cost, After ten years, Held to maturity	6,350
Amortized Cost, Held to maturity	6,849
Amortized Cost, Mortgage-backed securities, Held to maturity	376
Held-to-maturity, Amortized Cost	7,225	$ 7,656
Fair Value of Held-to-maturity Securities
Fair Value, Within one year, Held to Maturity	178
Fair Value, After five but within ten years, Held to maturity	344
Fair Value, After ten years, Held to maturity	6,602
Fair Value, Held to maturity	7,124
Fair Value, Mortgage-backed securities, Held to maturity	389
Held to maturity, Fair Value	$ 7,513	$ 7,889

Investment securities - Pledged

Investment securities - Pledged Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale and Held-to-maturity securities
Carrying value of securities pledged	us-gaap:AssetPledgedAsCollateralMember	us-gaap:AssetPledgedAsCollateralMember
Collateral Pledged
Available-for-sale and Held-to-maturity securities
Carrying value of securities pledged	$ 165,982	$ 157,047
U.S. government-sponsored enterprises state and municipals
Available-for-sale and Held-to-maturity securities
Maximum percentage of stockholders' equity exceeded for securities of any individual issuer	10.00%	10.00%

Investment securities - Fair Va

Investment securities - Fair Value and Unrealized Losses of Investment Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	$ 27,585	$ 78,239
12 Months or More, Fair Value	284	43,281
Less Than 12 Months, Unrealized Losses	202	1,035
12 Months or More, Unrealized Losses	1	118
Total, Fair Value	27,869	121,520
Total, Unrealized Losses	203	1,153
State and Municipals, Taxable
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	9,246	23,929
Less Than 12 Months, Unrealized Losses	30	815
Total, Fair Value	9,246	23,929
Total, Unrealized Losses	30	815
State and Municipals, Tax-exempt
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	6,786	2,684
12 Months or More, Fair Value		1,098
Less Than 12 Months, Unrealized Losses	37	19
12 Months or More, Unrealized Losses		1
Total, Fair Value	6,786	3,782
Total, Unrealized Losses	37	20
U.S. government-sponsored enterprises state and municipals
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value		13,695
12 Months or More, Fair Value		36,070
Less Than 12 Months, Unrealized Losses		149
12 Months or More, Unrealized Losses		78
Total, Fair Value		49,765
Total, Unrealized Losses		227
Mortgage-backed Securities, U.S. government agencies
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value		992
12 Months or More, Fair Value		2,362
Less Than 12 Months, Unrealized Losses		1
12 Months or More, Unrealized Losses		9
Total, Fair Value		3,354
Total, Unrealized Losses		10
Mortgage-backed Securities, U.S. government-sponsored enterprises
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	11,553	36,939
12 Months or More, Fair Value	284	3,751
Less Than 12 Months, Unrealized Losses	135	51
12 Months or More, Unrealized Losses	1	30
Total, Fair Value	11,837	40,690
Total, Unrealized Losses	$ 136	$ 81

Investment securities - Additio

Investment securities - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)securityshares	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Number of investment securities held	26
Other-than-temporary impairments recognized | $	$ 0	$ 0	$ 0
Visa Class A stock
Conversion ratio of common stock	1.6228
Shares to be issued following resolution of Visa litigation | shares	72,997
Visa Class B stock
Shares held | shares	44,982
Mortgage-backed Securities, U.S. government-sponsored enterprises
Number of investment securities held	6
Number of securities in continuous unrealized loss positions 12 months or longer	2
State and Municipals, Taxable
Number of investment securities held	8
State and Municipals, Tax-exempt
Number of investment securities held	12

Loans, net and allowance for _3

Loans, net and allowance for loan losses - Net Deferred Loan Costs (Details) - USD ($)	12 Months Ended			36 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Net deferred loan costs	$ 2,058,000	$ 908,000		$ 908,000
Loans	2,177,982,000	1,938,240,000	$ 1,823,266,000	1,938,240,000
Loans outstanding to directors, executive officers, principal stockholders or to their affiliates	5,031,000	12,248,000		12,248,000
Advances of loans receivable	3,747,000	7,857,000
Repayments of loans receivable	5,574,000	9,376,000
Number of related party loans classified as nonaccrual, past due, or restructured	0	0
Deposits from related parties	9,000,000	12,900,000		12,900,000
Interest income recognized using the cash-basis method on impaired loans	0	0	0	0
Commercial
Loans	679,286,000	522,957,000	494,134,000	522,957,000
Real estate Commercial
Loans	1,137,990,000	1,011,423,000	907,803,000	1,011,423,000
Real estate Residential
Loans	277,414,000	301,378,000	299,876,000	301,378,000
Consumer
Loans	83,292,000	$ 102,482,000	$ 121,453,000	$ 102,482,000
PPP
Loans	$ 189,699,000

Loans, net and allowance for _4

Loans, net and allowance for loan losses - Major Classifications of Loans Outstanding (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable
Loans	$ 2,177,982	$ 1,938,240	$ 1,823,266
Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	679,286	522,957	494,134
Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,137,990	1,011,423	907,803
Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	277,414	301,378	299,876
Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	$ 83,292	$ 102,482	$ 121,453

Loans, net and allowance for _5

Loans, net and allowance for loan losses - Changes in Allowance for Loan Losses Account by Major Classification of Loans (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	Dec. 31, 2018
Allowance for loan losses:
Beginning Balance				$ 22,677				$ 21,379	$ 22,677	$ 21,379	$ 18,960
Charge-offs									(3,479)	(5,067)	(2,354)
Recoveries									746	265	573
Provisions	$ 1,050	$ 1,050	$ 1,800	3,500	$ 4,000	$ 700	$ 350	1,050	7,400	6,100	4,200
Ending balance	27,344				22,677				27,344	22,677	21,379
Allowance for credit losses increase (decrease)									4,600
Write-offs net of recoveries									2,700
Commercial
Allowance for loan losses:
Beginning Balance				6,888				5,516	6,888	5,516	5,513
Charge-offs									(2,771)	(3,314)	(154)
Recoveries									525	69	137
Provisions									4,092	4,617	20
Ending balance	8,734				6,888				8,734	6,888	5,516
Partial write down									1,100
Charge-offs originated from one employee and deemed impaired										2,300
Loans receivable specific reserve					300					300
Commercial | Small Business Line of Credit
Allowance for loan losses:
Charge-offs									(900)	(2,300)
Recoveries									200
Commercial | Separate Credit
Allowance for loan losses:
Recoveries									200
Commercial | Other Commercial Loans
Allowance for loan losses:
Charge-offs										(1,000)
Real estate Commercial
Allowance for loan losses:
Beginning Balance				11,496				10,736	11,496	10,736	8,944
Charge-offs									(144)	(817)	(1,250)
Recoveries									16	1	136
Provisions									3,191	1,576	2,906
Ending balance	14,559				11,496				14,559	11,496	10,736
Real estate Residential
Allowance for loan losses:
Beginning Balance				3,226				3,892	3,226	3,892	3,111
Charge-offs									(247)	(477)	(405)
Recoveries									57	29	98
Provisions									93	(218)	1,088
Ending balance	3,129				3,226				3,129	3,226	3,892
Consumer
Allowance for loan losses:
Beginning Balance				$ 1,067				$ 1,235	1,067	1,235	1,392
Charge-offs									(317)	(459)	(545)
Recoveries									148	166	202
Provisions									24	125	186
Ending balance	$ 922				$ 1,067				$ 922	$ 1,067	$ 1,235

Loans, net and allowance for _6

Loans, net and allowance for loan losses - Allocation of Allowance for Loan Losses and Related Loans by Major Classification of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses:
Ending balance	$ 27,344	$ 22,677	$ 21,379	$ 18,960
Ending balance: individually evaluated for impairment	1,202	777	1,179
Ending balance: collectively evaluated for impairment	26,142	21,900	20,200
Loans receivable:
Ending balance	2,177,982	1,938,240	1,823,266
Ending balance: individually evaluated for impairment	9,906	10,120	9,641
Ending balance: collectively evaluated for impairment	2,168,076	1,928,120	1,813,625
Commercial
Allowance for loan losses:
Ending balance	8,734	6,888	5,516	5,513
Ending balance: individually evaluated for impairment	947	363	50
Ending balance: collectively evaluated for impairment	7,787	6,525	5,466
Loans receivable:
Ending balance	679,286	522,957	494,134
Ending balance: individually evaluated for impairment	4,297	4,658	2,237
Ending balance: collectively evaluated for impairment	674,989	518,299	491,897
Real estate Commercial
Allowance for loan losses:
Ending balance	14,559	11,496	10,736	8,944
Ending balance: individually evaluated for impairment	180	279	403
Ending balance: collectively evaluated for impairment	14,379	11,217	10,333
Loans receivable:
Ending balance	1,137,990	1,011,423	907,803
Ending balance: individually evaluated for impairment	3,952	3,048	3,121
Ending balance: collectively evaluated for impairment	1,134,038	1,008,375	904,682
Real estate Residential
Allowance for loan losses:
Ending balance	3,129	3,226	3,892	3,111
Ending balance: individually evaluated for impairment	75	135	666
Ending balance: collectively evaluated for impairment	3,054	3,091	3,226
Loans receivable:
Ending balance	277,414	301,378	299,876
Ending balance: individually evaluated for impairment	1,546	2,153	4,071
Ending balance: collectively evaluated for impairment	275,868	299,225	295,805
Consumer
Allowance for loan losses:
Ending balance	922	1,067	1,235	$ 1,392
Ending balance: individually evaluated for impairment			60
Ending balance: collectively evaluated for impairment	922	1,067	1,175
Loans receivable:
Ending balance	83,292	102,482	121,453
Ending balance: individually evaluated for impairment	111	261	212
Ending balance: collectively evaluated for impairment	$ 83,181	$ 102,221	$ 121,241

Loans, net and allowance for _7

Loans, net and allowance for loan losses - Major Classification of Loans Portfolio Summarized by Credit Quality (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable
Loans	$ 2,177,982	$ 1,938,240	$ 1,823,266
Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	679,286	522,957	494,134
Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,137,990	1,011,423	907,803
Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	277,414	301,378	299,876
Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	83,292	102,482	$ 121,453
Pass
Accounts, Notes, Loans and Financing Receivable
Loans	2,125,800	1,908,233
Pass | Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	660,559	513,994
Pass | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,107,699	993,645
Pass | Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	274,327	298,449
Pass | Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	83,215	102,145
Special Mention
Accounts, Notes, Loans and Financing Receivable
Loans	31,966	6,942
Special Mention | Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	14,305	3,837
Special Mention | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	17,517	2,508
Special Mention | Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	144	597
Substandard
Accounts, Notes, Loans and Financing Receivable
Loans	20,216	23,065
Substandard | Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	4,422	5,126
Substandard | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	12,774	15,270
Substandard | Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	2,943	2,332
Substandard | Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	$ 77	$ 337

Loans, net and allowance for _8

Loans, net and allowance for loan losses - Reclassification of Commercial Credits Category (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)loan
Special Mention | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Number of loans reclassified | loan	4
Number of loans reclassified during the period due to the loss of major tenants | loan	2
Change in category	$ 9
Increase (decrease) in loans and leases receivable due to hospitality industry and financial difficulties due to COVID-19	4.5
Special Mention | Commercial
Accounts, Notes, Loans and Financing Receivable
Increase (decrease) in loans and leases receivable	13
Substandard | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Change in category due to construction delays	$ 5.1

Loans, net and allowance for _9

Loans, net and allowance for loan losses - Information Concerning Nonaccrual Loans by Major Loan Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	$ 8,117	$ 7,510
Commercial
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	3,822	3,336
Real estate Commercial
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	3,262	2,765
Real estate Residential
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	922	1,148
Consumer
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	$ 111	$ 261

Loans, net and allowance for_10

Loans, net and allowance for loan losses - Major Classification of Loans by Past Due Status (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020USD ($)loan	Dec. 31, 2020USD ($)loan	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Financing Receivable, Recorded Investment, Past Due
Total Past Due		$ 11,728	$ 12,801
Current		2,166,254	1,925,439
Total Loans		2,177,982	1,938,240	$ 1,823,266
Loans > 90 Days and Accruing		71	378
Loan receivable balances where payment deferrals were granted	$ 330,119	$ 6,084
Minimum
Financing Receivable, Recorded Investment, Past Due
Number of days in which principal only payments and principal and interest deferrals are generally granted		90 days
Maximum
Financing Receivable, Recorded Investment, Past Due
Number of days in which principal only payments and principal and interest deferrals are generally granted		180 days
Commercial loans
Financing Receivable, Recorded Investment, Past Due
Number of commercial loans added to non-accrual loans | loan		3
Number of commercial loans added to non-accrual loans with specific reserves allocated | loan		2
Number of business loans with payment deferrals granted | loan		479
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		$ 2,863	3,688
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		677	1,525
Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due		8,188	7,588
Commercial
Financing Receivable, Recorded Investment, Past Due
Total Past Due		3,895	3,111
Current		675,391	519,846
Total Loans		$ 679,286	522,957	494,134
Number of business loans with payment deferrals granted | loan		18
Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		$ 73	75
Commercial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due		3,822	3,036
Real estate Commercial
Financing Receivable, Recorded Investment, Past Due
Total Past Due		3,740	3,866
Current		1,134,250	1,007,557
Total Loans		1,137,990	1,011,423	907,803
Real estate Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		344	926
Real estate Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		134	175
Real estate Commercial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due		3,262	2,765
Real estate Residential
Financing Receivable, Recorded Investment, Past Due
Total Past Due		3,545	4,917
Current		273,869	296,461
Total Loans		277,414	301,378	299,876
Loans > 90 Days and Accruing		71	378
Real estate Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		2,072	2,164
Real estate Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		480	1,227
Real estate Residential | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due		993	1,526
Consumer
Financing Receivable, Recorded Investment, Past Due
Total Past Due		548	907
Current		82,744	101,575
Total Loans		$ 83,292	102,482	$ 121,453
Number of business loans with payment deferrals granted | loan	512	26
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		$ 374	523
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due		63	123
Consumer | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due		111	$ 261
PPP
Financing Receivable, Recorded Investment, Past Due
Total Loans		$ 189,699

Loans, net and allowance for_11

Loans, net and allowance for loan losses - Summarized Information in Concerning to Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	$ 5,820	$ 7,535	$ 5,653
Unpaid Principal Balance, With no related allowance, Total	7,769	8,714	7,017
Average Recorded Investment, With no related allowance, Total	6,453	7,887	6,468
Interest Income Recognized, With no related allowance, Total	79	126	117
Recorded Investment, With an allowance recorded, Total	4,086	2,585	3,988
Unpaid Principal Balance, With an allowance recorded, Total	4,286	3,299	4,386
Related Allowance, With an allowance recorded, Total	1,202	777	1,179
Average Recorded Investment, With an allowance recorded, Total	4,349	3,490	4,288
Interest Income Recognized, With an allowance recorded, Total	66	71	70
Recorded Investment, Total	9,906	10,120	9,641
Unpaid Principal Balance, Total	12,055	12,013	11,403
Related Allowance, With an allowance recorded, Total	1,202	777	1,179
Average Recorded Investment, Total	10,802	11,377	10,756
Interest Income Recognized, Total	145	197	187
Commercial
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	2,251	3,638	1,562
Unpaid Principal Balance, With no related allowance, Total	3,421	4,175	1,900
Average Recorded Investment, With no related allowance, Total	2,915	3,907	1,318
Interest Income Recognized, With no related allowance, Total	30	63	67
Recorded Investment, With an allowance recorded, Total	2,046	1,020	675
Unpaid Principal Balance, With an allowance recorded, Total	2,094	1,038	675
Related Allowance, With an allowance recorded, Total	947	363	50
Average Recorded Investment, With an allowance recorded, Total	2,038	1,012	1,006
Interest Income Recognized, With an allowance recorded, Total	17	32	30
Recorded Investment, Total	4,297	4,658	2,237
Unpaid Principal Balance, Total	5,515	5,213	2,575
Related Allowance, With an allowance recorded, Total	947	363	50
Average Recorded Investment, Total	4,953	4,919	2,324
Interest Income Recognized, Total	47	95	97
Real estate Commercial
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	2,372	1,918	1,969
Unpaid Principal Balance, With no related allowance, Total	2,964	2,205	2,299
Average Recorded Investment, With no related allowance, Total	2,148	2,385	2,822
Interest Income Recognized, With no related allowance, Total	28	38	28
Recorded Investment, With an allowance recorded, Total	1,580	1,130	1,152
Unpaid Principal Balance, With an allowance recorded, Total	1,710	1,811	1,323
Related Allowance, With an allowance recorded, Total	180	279	403
Average Recorded Investment, With an allowance recorded, Total	1,687	1,050	1,676
Interest Income Recognized, With an allowance recorded, Total	36	10	18
Recorded Investment, Total	3,952	3,048	3,121
Unpaid Principal Balance, Total	4,674	4,016	3,622
Related Allowance, With an allowance recorded, Total	180	279	403
Average Recorded Investment, Total	3,835	3,435	4,498
Interest Income Recognized, Total	64	48	46
Real estate Residential
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	1,086	1,718	1,970
Unpaid Principal Balance, With no related allowance, Total	1,263	2,060	2,658
Average Recorded Investment, With no related allowance, Total	1,223	1,362	2,193
Interest Income Recognized, With no related allowance, Total	21	25	22
Recorded Investment, With an allowance recorded, Total	460	435	2,101
Unpaid Principal Balance, With an allowance recorded, Total	482	450	2,328
Related Allowance, With an allowance recorded, Total	75	135	666
Average Recorded Investment, With an allowance recorded, Total	624	1,408	1,585
Interest Income Recognized, With an allowance recorded, Total	13	29	22
Recorded Investment, Total	1,546	2,153	4,071
Unpaid Principal Balance, Total	1,745	2,510	4,986
Related Allowance, With an allowance recorded, Total	75	135	666
Average Recorded Investment, Total	1,847	2,770	3,778
Interest Income Recognized, Total	34	54	44
Consumer
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	111	261	152
Unpaid Principal Balance, With no related allowance, Total	121	274	160
Average Recorded Investment, With no related allowance, Total	167	233	135
Recorded Investment, With an allowance recorded, Total			60
Unpaid Principal Balance, With an allowance recorded, Total			60
Related Allowance, With an allowance recorded, Total			60
Average Recorded Investment, With an allowance recorded, Total		20	21
Recorded Investment, Total	111	261	212
Unpaid Principal Balance, Total	121	274	220
Related Allowance, With an allowance recorded, Total			60
Average Recorded Investment, Total	$ 167	$ 253	$ 156

Loans, net and allowance for_12

Loans, net and allowance for loan losses - Loans Modified Resulting in Troubled Debt Restructurings (Details)	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2020USD ($)loan	Dec. 31, 2020USD ($)contract	Dec. 31, 2019USD ($)loancontract	Dec. 31, 2018USD ($)loancontract
Loans in the formal process of foreclosure	$ 135,000	$ 135,000	$ 135,000	$ 665,000
Number of loans modified		4	4	1	1
Pre-Modification Outstanding Recorded Investment	1,085,000
Post-Modification Outstanding Recorded Investment	1,085,000
Recorded Investment	1,051,000	$ 1,051,000	$ 1,051,000
Number of defaults on loans restructured	0			$ 0	$ 0
Loans receivable, related parties, considered as nonaccrual, past due or restructured or potential credit risk	2,818,000	$ 2,818,000	$ 2,818,000	$ 2,193,000
COVID 19
Number of loans modified | loan		4
COVID 19 | Restaurant
Number of loans modified | loan		2
COVID 19 | Retail, Small Business
Number of loans modified | loan		2
Commercial
Number of loans modified | contract			1
Pre-Modification Outstanding Recorded Investment	12,000
Post-Modification Outstanding Recorded Investment	12,000
Recorded Investment	5,000	$ 5,000	$ 5,000
Real estate Commercial
Number of loans modified | contract			3	1	1
Pre-Modification Outstanding Recorded Investment	1,073,000			$ 346,000	$ 340,000
Post-Modification Outstanding Recorded Investment	1,073,000			346,000	340,000
Recorded Investment	$ 1,046,000	$ 1,046,000	$ 1,046,000	$ 241,000	$ 340,000

Loans, net and allowance for_13

Loans, net and allowance for loan losses - Schedule of Payment Deferrals Granted on Commercial Loans (Details) - Commercial - Loan Deferrals $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)loan
Number of Loans | loan	18
Balance | $	$ 5,796
Percentage of Total Loan Portfolio	0.30%
Percentage of Tier 1 Capital (Bank)	2.30%
Maximum
Number of Loans | loan	479
Balance | $	$ 306,770
Percentage of Total Loan Portfolio	14.10%
Percentage of Tier 1 Capital (Bank)	113.70%
Lessors of Nonresidential Buildings | Maximum
Number of Loans | loan	65
Balance | $	$ 71,899
Percentage of Total Loan Portfolio	3.30%
Percentage of Tier 1 Capital (Bank)	26.90%
Lessors of Residential Buildings and Dwellings
Number of Loans | loan	3
Balance | $	$ 143
Percentage of Tier 1 Capital (Bank)	0.10%
Lessors of Residential Buildings and Dwellings | Maximum
Number of Loans | loan	64
Balance | $	$ 53,564
Percentage of Total Loan Portfolio	2.50%
Percentage of Tier 1 Capital (Bank)	19.90%
Hotels and Motels | Maximum
Number of Loans | loan	27
Balance | $	$ 39,261
Percentage of Total Loan Portfolio	1.80%
Percentage of Tier 1 Capital (Bank)	14.50%
Full-Service Restaurants
Number of Loans | loan	3
Balance | $	$ 1,961
Percentage of Total Loan Portfolio	0.10%
Percentage of Tier 1 Capital (Bank)	0.80%
Full-Service Restaurants | Maximum
Number of Loans | loan	33
Balance | $	$ 27,783
Percentage of Total Loan Portfolio	1.30%
Percentage of Tier 1 Capital (Bank)	10.30%
General Automotive Repair
Number of Loans | loan	1
Balance | $	$ 1,459
Percentage of Total Loan Portfolio	0.10%
Percentage of Tier 1 Capital (Bank)	0.60%
School and Employee Bus Transportation
Number of Loans | loan	1
Balance | $	$ 725
Percentage of Tier 1 Capital (Bank)	0.30%
Limited-Service Restaurants | Maximum
Number of Loans | loan	8
Balance | $	$ 11,829
Percentage of Total Loan Portfolio	0.50%
Percentage of Tier 1 Capital (Bank)	4.40%
Gasoline Stations with Convenience Stores | Maximum
Number of Loans | loan	18
Balance | $	$ 12,422
Percentage of Total Loan Portfolio	0.60%
Percentage of Tier 1 Capital (Bank)	4.60%
Construction and Mining | Maximum
Number of Loans | loan	13
Balance | $	$ 9,718
Percentage of Total Loan Portfolio	0.40%
Percentage of Tier 1 Capital (Bank)	3.60%
Assisted Living Facilities for the Elderly | Maximum
Number of Loans | loan	2
Balance | $	$ 6,319
Percentage of Total Loan Portfolio	0.30%
Percentage of Tier 1 Capital (Bank)	2.30%
Colleges, Universities, and Professional Schools | Maximum
Number of Loans | loan	1
Balance | $	$ 6,301
Percentage of Total Loan Portfolio	0.30%
Percentage of Tier 1 Capital (Bank)	2.30%
All Others
Number of Loans | loan	10
Balance | $	$ 1,508
Percentage of Total Loan Portfolio	0.10%
Percentage of Tier 1 Capital (Bank)	0.60%
All Others | Maximum
Number of Loans | loan	248
Balance | $	$ 67,674
Percentage of Total Loan Portfolio	3.10%
Percentage of Tier 1 Capital (Bank)	24.90%

Off-balance sheet financial i_3

Off-balance sheet financial instruments - Summary of Contractual Amounts of Off-balance Sheet Commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Off-balance sheet financial instruments.
Commitments to extend credit	$ 336,667	$ 290,517
Unused portions of lines of credit	55,391	52,168
Standby letters of credit	34,428	45,018
Total contractual amounts of off-balance sheet commitments	$ 426,486	$ 387,703

Off-balance sheet financial i_4

Off-balance sheet financial instruments - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Off-balance sheet financial instruments.
Expiration period of standby letters	12 months
Amount of standby letters of credit	$ 4,902	$ 31,893

Premises and equipment, net - S

Premises and equipment, net - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment
Premises and equipment, gross	$ 78,490	$ 76,787
Less: accumulated depreciation	31,445	28,855
Premises and equipment, net	47,045	47,932
Land
Property, Plant and Equipment
Premises and equipment, gross	5,217	5,535
Premises and leasehold improvements
Property, Plant and Equipment
Premises and equipment, gross	48,596	47,705
Right-Of-Use Assets
Property, Plant and Equipment
Premises and equipment, gross	6,282	6,125
Furniture, fixtures and equipment
Property, Plant and Equipment
Premises and equipment, gross	$ 18,395	$ 17,422

Operating lease commitments a_3

Operating lease commitments and contingencies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)item	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Operating leases
Options to renew	true
Renewal term	5 years
Weighted average remaining lease term	13 years	16 years
Weighted-average discount rate	3.19%	3.46%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Lease liabilities for operating leases	$ 6,425
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities	Other Liabilities
Lease payments	$ 660
Lease expense	$ 326
Number of operating lease terminated | item	2
Rent expense	$ 727	$ 670
Rent expense			$ 492
Premises and Equipment
Operating leases
Right-of-use assets	6,282	6,125
Other Liabilities.
Operating leases
Lease liabilities for operating leases	6,425	$ 6,194
Additional Lease Property
Operating leases
Lease liabilities for operating leases	$ 899
Number of operating lease added | item	1
Minimum
Operating leases
Remaining renewal term	3 years
Discount rate	1.95%	2.89%
Maximum
Operating leases
Remaining renewal term	21 years
Discount rate	3.85%	3.85%

Operating lease commitments a_4

Operating lease commitments and contingencies - Summary of Future Minimum Rental Commitments Under Operating Leases (Details) $ in Thousands	Dec. 31, 2020USD ($)
Operating lease commitments and contingencies
2021	$ 611
2022	618
2023	560
2024	488
2025	504
Thereafter	5,500
Total payments	8,281
Less amount representing interest	(1,856)
Present value of future minimum lease payments	$ 6,425

Intangible assets, net - Additi

Intangible assets, net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets
Gross carrying amount of intangible assets	$ 1,091	$ 1,091
Amortization of intangibles	606	730	$ 881
Core Deposit
Finite-Lived Intangible Assets
Gross carrying amount of intangible assets	8,146	8,146
Accumulated amortization on intangible assets	7,507	7,071
Trade Name
Finite-Lived Intangible Assets
Gross carrying amount of intangible assets	203	203
Accumulated amortization on intangible assets	182	168
Asset Management And Retirement Plan Services
Finite-Lived Intangible Assets
Accumulated amortization on intangible assets	$ 792	$ 636

Intangible assets, net - Summar

Intangible assets, net - Summary of Estimated Amortization Expense on Intangible Assets (Details) $ in Thousands	Dec. 31, 2020USD ($)
Intangible assets, net
2021	$ 491
2022	363
2023	106
Total	$ 960

Other assets - Components of Ot

Other assets - Components of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other real estate owned	$ 864	$ 450
Investment in low income housing partnership	6,332	6,901
Mortgage servicing rights	838	738
Restricted equity securities (FHLB and other)	5,397	10,201
Net deferred tax asset	3,768	3,362
Interest rate floor and swaps	15,371	5,672
Total	38,915	34,179
Interest Rate Floor
Interest rate floor and swaps	1,678	944
Interest Rate Swaps
Interest rate floor and swaps	13,693	4,728
Other assets	$ 6,345	$ 6,855

Other assets - Unpaid Principal

Other assets - Unpaid Principal Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other assets
Unpaid principal balances of mortgage loans serviced for others	$ 166,472	$ 159,587

Deposits - Components of Intere

Deposits - Components of Interest-bearing and Noninterest-bearing Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deposits.
Money market accounts	$ 496,634	$ 365,463
Now accounts	567,087	402,999
Savings accounts	431,224	370,270
Time deposits less than $250	221,446	231,450
Time deposits $250 or more	98,247	138,069
Total interest-bearing deposits	1,814,638	1,508,251
Noninterest-bearing deposits	622,475	463,238
Total deposits	$ 2,437,113	$ 1,971,489

Deposits - Schedule of Maturiti

Deposits - Schedule of Maturities of Time Deposits (Details) $ in Thousands	Dec. 31, 2020USD ($)
Deposits.
2021	$ 223,247
2022	40,093
2023	22,905
2024	15,099
2025	7,316
Thereafter	11,033
Total	$ 319,693

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deposits.
Aggregate amount of deposits reclassified as loans	$ 245	$ 343

Short-term borrowings (Details)

Short-term borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Short-term Debt
Ending Balance	$ 50,000	$ 152,150
FHLB advances
Short-term Debt
Ending Balance	50,000	152,150	$ 86,500
Average Balance	83,716	62,941	133,834
Maximum Month-End Balance	$ 179,199	$ 152,150	$ 189,275
Weighted Average Rate for the Year	1.01%	2.61%	2.05%
Weighted Average Rate at End of Year	0.40%	1.84%	2.62%

Short-term borrowings - Additio

Short-term borrowings - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt
Maximum borrowing capacity	$ 18,000	$ 18,000
Outstanding amount in borrowings	0	$ 0
Peoples Bank
Short-term Debt
Maximum borrowing capacity	807,042
Outstanding amount in borrowings	64,769
Amount of credit facility used to issue standby letters of credit to collateralize public fund deposits	$ 218,350

Long-term debt - Long-term debt

Long-term debt - Long-term debt advances (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument
Long-term debt	$ 14,769	$ 32,733
Long-term 1.74% fixed rate debt due June 2020
Debt Instrument
Long-term debt		5,000
Fixed interest rate (as a percent)	1.74%
Long-term 2.22% fixed rate debt due June 2020
Debt Instrument
Long-term debt		6,000
Fixed interest rate (as a percent)	2.22%
Long-term 1.84% fixed rate debt due December 2020
Debt Instrument
Long-term debt		5,000
Fixed interest rate (as a percent)	1.84%
Long-term 1.99% fixed rate debt due June 2021
Debt Instrument
Long-term debt	$ 10,000	10,000
Fixed interest rate (as a percent)	1.99%
Long-term 4.69% fixed rate debt due March 2023
Debt Instrument
Long-term debt	$ 4,769	$ 6,733
Fixed interest rate (as a percent)	4.69%

Long-term debt - Maturities of

Long-term debt - Maturities of long-term debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Long-term debt.
2021	$ 12,058
2022	2,156
2023	555
Total long-term debt	$ 14,769	$ 32,733

Long-term debt - Fixed and adju

Long-term debt - Fixed and adjustable rate information (Details)	12 Months Ended
	Dec. 31, 2020USD ($)item	Dec. 31, 2019USD ($)
Debt Instrument
Number of FHLB advances entered | item	0
FHLB long-term advances		$ 16,000
PPP
Debt Instrument
Long-term debt	$ 0
Minimum | FHLB advance one
Debt Instrument
FHLB advances term		1 year
Minimum | PPP
Debt Instrument
Loan term	24 months
Maximum | FHLB advance two
Debt Instrument
FHLB advances term		2 years
Maximum | PPP
Debt Instrument
Loan term	60 months

Subordinated debt (Details)

Subordinated debt (Details) - 2020 Notes $ in Thousands	Jun. 01, 2020USD ($)
Debt Instrument [Line Items]
Aggregate principal amount	$ 33
Rate of interest for first five years	5.375%
Duration interest rate in effect	5 years
Percentage of debt redeemed	100.00%
Minimum
Debt Instrument [Line Items]
Floated interest rate	4.75%
Number of days notice to redeem debt	10 days

Fair value estimates - Schedule

Fair value estimates - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	$ 298,158	$ 332,879
U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	18,905	24,128
U.S. government-sponsored enterprises state and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	65,188	87,110
State and Municipals, Taxable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	55,366	34,898
State and Municipals, Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	56,994	60,163
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	1,000
Mortgage-backed Securities, U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	3,707	8,470
Mortgage-backed Securities, U.S. government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	94,751	115,709
Common equity securities.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	138	423
Loan held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	837	986
Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	1,678	944
Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	13,693	4,728
Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	(14,099)	(4,680)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	19,043	24,551
Level 1 | U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	18,905	24,128
Level 1 | Common equity securities.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	138	423
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	279,115	308,328
Level 2 | U.S. government-sponsored enterprises state and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	65,188	87,110
Level 2 | State and Municipals, Taxable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	55,366	34,898
Level 2 | State and Municipals, Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	56,994	60,163
Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	1,000
Level 2 | Mortgage-backed Securities, U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	3,707	8,470
Level 2 | Mortgage-backed Securities, U.S. government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	94,751	115,709
Level 2 | Loan held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	837	986
Level 2 | Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	1,678	944
Level 2 | Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	13,693	4,728
Level 2 | Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	$ (14,099)	(4,680)
Level 3 | Common equity securities.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate
Level 3 | Loan held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate
Level 3 | Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate
Level 3 | Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate
Level 3 | Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value

Fair value estimates - Schedu_2

Fair value estimates - Schedule of Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring Basis - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	$ 2,884	$ 1,808
Other real estate owned	527	283
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	2,884	1,808
Other real estate owned	$ 527	$ 283

Fair value estimates - Addition

Fair value estimates - Additional Quantitative Information about Assets Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring Basis - Level 3 - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other real estate owned
Fair Value Inputs, Assets, Quantitative Information
Assets, Fair Value Estimate	$ 527	$ 283
Range and weighted average of appraisal adjustments	29.90%	43.70%
Range and weighted average of liquidation expenses	5.00%	5.00%
Other real estate owned | Minimum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	3.10%	20.00%
Range and weighted average of liquidation expenses	3.00%	3.00%
Other real estate owned | Maximum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	58.10%	63.60%
Range and weighted average of liquidation expenses	6.00%	6.00%
Impaired loans
Fair Value Inputs, Assets, Quantitative Information
Assets, Fair Value Estimate	$ 2,884	$ 1,808
Range and weighted average of appraisal adjustments	28.20%	54.40%
Range and weighted average of liquidation expenses	5.50%	5.20%
Impaired loans | Minimum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	9.00%	8.60%
Range and weighted average of liquidation expenses	3.00%	3.00%
Impaired loans | Maximum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	97.00%	97.00%
Range and weighted average of liquidation expenses	6.00%	6.00%

Fair value estimates - Carrying

Fair value estimates - Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investment securities:
Available-for-sale	$ 295,911	$ 330,478
Common equity securities	138	423
Held-to-maturity	7,513	7,889
Loans held for sale	837	986
Mortgage servicing rights	838	738
Financial liabilities:
Subordinated debentures	33,000
Carrying Value
Financial assets:
Cash and due from banks	228,192	31,153
Investment securities:
Available-for-sale	295,911	330,478
Common equity securities	138	423
Held-to-maturity	7,225	7,656
Loans held for sale	837	986
Net loans	2,150,638	1,915,563
Accrued interest receivable	8,255	6,981
Mortgage servicing rights	838	738
Restricted equity securities (FHLB and other)	5,397	10,201
Interest rate floor	1,678	944
Interest rate swaps	13,693	4,728
Total assets	2,712,802	2,309,851
Financial liabilities:
Deposits	2,437,113	1,971,489
Long-term debt	14,769	32,733
Subordinated debentures	33,000
Accrued interest payable	736	1,277
Interest rate swap	14,099	4,680
Total liabilities	2,499,717	2,010,179
Fair Value
Financial assets:
Cash and due from banks	228,192	31,153
Investment securities:
Available-for-sale	295,911	330,478
Common equity securities	138	423
Held-to-maturity	7,513	7,889
Loans held for sale	837	986
Net loans	2,145,752	1,881,658
Accrued interest receivable	8,255	6,981
Mortgage servicing rights	1,269	1,444
Restricted equity securities (FHLB and other)	5,397	10,201
Interest rate floor	1,678	944
Interest rate swaps	13,693	4,728
Total assets	2,708,635	2,276,885
Financial liabilities:
Deposits	2,441,014	1,972,084
Long-term debt	15,073	33,075
Subordinated debentures	33,096
Accrued interest payable	736	1,277
Interest rate swap	14,099	4,680
Total liabilities	2,504,018	2,011,116
Level 1
Financial assets:
Cash and due from banks	228,192	31,153
Investment securities:
Available-for-sale	18,905	24,128
Common equity securities	138	423
Level 2
Investment securities:
Available-for-sale	277,006	306,350
Held-to-maturity	7,513	7,889
Loans held for sale	837	986
Accrued interest receivable	8,255	6,981
Mortgage servicing rights	1,269	1,444
Restricted equity securities (FHLB and other)	5,397	10,201
Interest rate floor	1,678	944
Interest rate swaps	13,693	4,728
Financial liabilities:
Deposits	2,441,014	1,972,084
Long-term debt	15,073	33,075
Subordinated debentures	33,096
Accrued interest payable	736	1,277
Interest rate swap	14,099	4,680
Level 3
Investment securities:
Net loans	$ 2,145,752	$ 1,881,658

Derivatives and hedging activ_3

Derivatives and hedging activities - Fair Values of Derivative Instruments on the Balance Sheet (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)security	Dec. 31, 2019USD ($)
Derivatives, Fair Value
Asset Derivatives		$ 15,371	$ 5,672
Liability Derivatives		14,099	4,680
Interest Receivable		8,255	6,981
Interest Payable		736	1,277
Net Amounts of Assets presented in the Balance Sheet		14,099	4,680
Interest income
Derivatives, Fair Value
Amount of gain or (loss) reclassified as a increase to interest income (expense)		150	42
Interest Rate Floor
Derivatives, Fair Value
Asset Derivatives		1,678	944
Interest Rate Swaps
Derivatives, Fair Value
Asset Derivatives		13,693	4,728
Credit-risk contract
Derivatives, Fair Value
Posted collateral		15,360	4,140
Net Amounts of Assets presented in the Balance Sheet		79	48
Derivatives designated as hedging instruments
Derivatives, Fair Value
Asset Derivatives		1,678	944
Liability Derivatives		485
Derivatives designated as hedging instruments | Interest Rate Floor
Derivatives, Fair Value
Notional amount		25,000
Asset Derivatives			944
Derivatives designated as hedging instruments | Interest Rate Floor | Other Assets
Derivatives, Fair Value
Asset Derivatives		1,678
Derivatives not designated as hedging instruments
Derivatives, Fair Value
Asset Derivatives		13,693	4,728
Liability Derivatives		$ 13,614	4,680
Derivatives not designated as hedging instruments | Interest Rate Swaps
Derivatives, Fair Value
Number of instruments held | security		73
Notional amount		$ 375,341	172,096
Interest Receivable			235
Interest Payable			235
Derivatives not designated as hedging instruments | Interest Rate Swaps | Other Assets
Derivatives, Fair Value
Asset Derivatives		13,693	4,728
Derivatives not designated as hedging instruments | Interest Rate Swaps | Other Liabilities.
Derivatives, Fair Value
Liability Derivatives		13,614	$ 4,680
Cash Flow Hedge | Derivatives designated as hedging instruments
Derivatives, Fair Value
Notional amount		50,000
Cash Flow Hedge | Derivatives designated as hedging instruments | Other Liabilities.
Derivatives, Fair Value
Liability Derivatives		$ 485
Forecast | Cash Flow Hedge | Interest income
Derivatives, Fair Value
Amount of gain or (loss) reclassified as a increase to interest income (expense)	$ 50,000

Derivatives and hedging activ_4

Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in OCI Included Component	$ 315	$ 441	$ 246
Amount of Gain (Loss) Recognized in OCI Included Component	1,002	687
Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(40)
Interest income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	134	26
Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative	53
Amount of Gain (Loss) Recognized in OCI Included Component	54
Amount of Loss Recognized in OCI Excluded Component	(1)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	94
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component	110
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Excluded Component	(16)
Cash Flow Hedge | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative	71
Amount of Gain (Loss) Recognized in OCI Included Component	71
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	(40)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component	(40)
Cash Flow Hedge | Interest Rate Floor | Interest income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative	(18)	192
Amount of Gain Recognized in OCI Included Component		196
Amount of Gain (Loss) Recognized in OCI Included Component	(17)
Amount of Loss Recognized in OCI Excluded Component	(1)	(4)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	134	26
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax		42
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component	150
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Excluded Component	$ (16)	$ (16)

Derivatives and hedging activ_5

Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on the Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss)
Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded	$ 315	$ 441	$ 246
Interest income
Derivative Instruments, Gain (Loss)
Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded	134	26
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income	134	26
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component	150	42
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component	(16)	$ 16
Interest expense
Derivative Instruments, Gain (Loss)
Total amounts of income and expense line items presented in the statements of income and comprehensive income in which the effects of fair value or cash flow hedges are recorded	(40)
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income	$ (40)

Derivatives and hedging activ_6

Derivatives and hedging activities - Effect of Other Derivative Instruments on the Income Statement (Details) - Derivatives not designated as hedging instruments - Interest Rate Swap Revenue - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest Rate Swaps
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income	$ 31	$ 77
Fee Income
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income	$ 2,290	$ 1,713

Derivatives and hedging activ_7

Derivatives and hedging activities - Offsetting Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	$ 15,371	$ 5,672
Net Amounts of Assets presented in the Balance Sheet	15,371	5,672
Net Amount	15,371	5,672
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	14,099	4,680
Net Amounts of Assets presented in the Balance Sheet	14,099	4,680
Net Amount	$ 14,099	$ 4,680

Stock plans - Additional Inform

Stock plans - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Non-Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award
Shares or units vesting period	3 years
Performance-based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award
Shares or units vesting period	3 years
Cumulative diluted earnings per share period used for conditions for vesting of performance-based restricted stock units	3 years
Average return on equity period used for conditions for vesting of performance-based restricted stock units	3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted shares	16,269	17,345	11,468
Vested shares	8,455	2,542	114
Number of nonvested restricted stock awards	31,923	25,984	12,892	1,538
Forfeited shares	1,875	1,711
Unrecognized compensation expense	$ 586
Weighted average vesting period	1 year 10 months 25 days
2008 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of nonvested restricted stock awards	0
Forfeited shares		1,327
Salaries and employee benefits expense		$ 122	$ 123
2008 Plan | Non-Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award
Vested shares	673	674
2008 Plan | Performance-based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award
Vested shares		5,743
2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Common stock available for grant as awards	56,966
Forfeited shares	1,875	1,711
Salaries and employee benefits expense	$ 570	$ 432	$ 149
2017 Plan | Non-Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted shares	3,615
Shares or units awarded		3,855
Number of nonvested restricted stock awards	1,920	1,614
2017 Plan | Performance-based restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award
Granted shares	12,654	13,490
Number of nonvested restricted stock awards	6,535	928

Stock plans - Schedule of Activ

Stock plans - Schedule of Activity Related to Restricted Stock (Details) - Restricted Stock - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award
Nonvested, January 1	25,984	12,892	1,538
Granted shares	16,269	17,345	11,468
Vested shares	8,455	2,542	114
Forfeited shares	1,875	1,711
Nonvested, December 31	31,923	25,984	12,892

Employee benefit plans - Salari

Employee benefit plans - Salaries and Employee Benefits Expense - ESOP (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Peoples Security Bank and Trust ESOP
Peoples Security Bank and Trust ESOP
Contribution to ESOP	$ 371	$ 357	$ 197

Employee benefit plans - Sala_2

Employee benefit plans - Salaries and Employee Benefits Expense - Profit Sharing (Details) - Retirement Profit Sharing Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Profit Sharing plan
Company contribution	$ 1,207	$ 1,139	$ 1,047
Safe harbor contribution	655	627	578
Discretionary contributions	$ 552	$ 512	$ 469

Employee benefit plans - Sala_3

Employee benefit plans - Salaries and Employee Benefits Expense - SERP and Employee Pension Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 22, 2008
Supplemental Executive Retirement Plans ("SERP")
Defined Benefit Plan Disclosure
Maximum annual benefit in excess of federal limits (as a percent)	6.00%
Employee benefit plan liability	$ 142	$ 133
Employee benefit plan expense	9	17	$ 20
Defined benefit plan accrued liabilities	2,351	2,077
Salaries and employee benefits expense	$ 461	360	$ 335
Pension Benefits
Defined Benefit Plan Disclosure
Retirement age period for fixed benefits payable	65 years
Benefits accrued under employees' pension plan				$ 0
Increase (decrease) in accumulated benefit obligation	$ 2,159	$ 1,221

Employee benefit plans - Summar

Employee benefit plans - Summary of Pension and Postretirement Life Insurance Plans (Details) - Pension Benefits - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in benefit obligation:
Benefit obligation, beginning	$ 17,491	$ 16,338
Interest cost	544	639	$ 623
Change in experience gain	(291)	96
Change in actuarial assumptions loss	2,159	1,221
Benefits paid	(790)	(803)
Benefit obligation, ending	19,113	17,491	16,338
Change in plan assets:
Fair value of plan assets, beginning	16,930	14,919
Actual return on plan assets	1,488	2,814
Benefits paid	(790)	(803)
Fair value of plan assets, ending	17,628	16,930	$ 14,919
Funded status at end of year	$ (1,485)	$ (561)

Employee benefit plans - Schedu

Employee benefit plans - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amounts recognized in the accumulated other comprehensive loss consist of:
Net amount recognized	$ 6,302	$ 5,197
Pension Benefits
Defined Benefit Plan Disclosure
Liabilities	1,485	561
Amounts recognized in the accumulated other comprehensive loss consist of:
Net actuarial gain	(7,977)	(6,579)
Deferred taxes	1,675	1,382
Net amount recognized	(6,302)	(5,197)
Accumulated benefit obligation	$ 19,113	$ 17,491	$ 16,338

Employee benefit plans - Compon

Employee benefit plans - Components of Net Periodic Pension Expense (Income) and Other Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net loss (gain)	$ 7,977	$ 6,579
Pension Benefits
Components of net periodic pension cost:
Interest cost	544	639	$ 623
Expected return on plan assets	(1,236)	(1,084)	(960)
Amortization of unrecognized net gain	218	227	194
Net periodic benefit	(474)	(218)	(143)
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net loss (gain)	544	639	(590)
Deferred tax	(114)	(134)	124
Total recognized in other comprehensive loss	430	505	(466)
Total recognized in net period pension cost and other comprehensive loss	$ (44)	$ 287	$ (609)

Employee benefit plans - Sche_2

Employee benefit plans - Schedule of Weighted-Average Assumptions Used to Determine Benefit Obligations and Related Expenses (Details) - Pension Benefits	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure
Discount rate, Obligation	2.25%	3.25%	4.00%
Discount rate, Expense	3.25%	4.00%	3.75%
Expected long-term return on plan assets	7.50%	7.50%	7.50%

Employee benefit plans - Sche_3

Employee benefit plans - Schedule of Pension Plan Weighted-Average Asset Allocations (Details) - Pension Benefits	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure
Weighted-average asset allocations	100.00%	100.00%
Cash and cash equivalents
Defined Benefit Plan Disclosure
Weighted-average asset allocations	6.80%	6.20%
Equity securities
Defined Benefit Plan Disclosure
Weighted-average asset allocations	63.30%	61.90%
Corporate debt securities
Defined Benefit Plan Disclosure
Weighted-average asset allocations	20.70%	20.60%
U.S. Treasuries and Government agencies
Defined Benefit Plan Disclosure
Weighted-average asset allocations	9.20%	11.30%

Employee benefit plans - Fair V

Employee benefit plans - Fair Value Measurement of Pension Plan Assets (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure
Fair value of pension plan assets	$ 17,628	$ 16,930	$ 14,919
Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of pension plan assets	1,203	1,053
U.S. large cap
Defined Benefit Plan Disclosure
Fair value of pension plan assets	10,266	9,663
International
Defined Benefit Plan Disclosure
Fair value of pension plan assets	888	817
U.S. Treasuries
Defined Benefit Plan Disclosure
Fair value of pension plan assets	216	202
U.S. Government agencies
Defined Benefit Plan Disclosure
Fair value of pension plan assets	1,400	1,713
Corporate debt securities
Defined Benefit Plan Disclosure
Fair value of pension plan assets	3,655	3,482
Level 1
Defined Benefit Plan Disclosure
Fair value of pension plan assets	12,357	11,533
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of pension plan assets	1,203	1,053
Level 1 | U.S. large cap
Defined Benefit Plan Disclosure
Fair value of pension plan assets	10,266	9,663
Level 1 | International
Defined Benefit Plan Disclosure
Fair value of pension plan assets	888	817
Level 2
Defined Benefit Plan Disclosure
Fair value of pension plan assets	5,271	5,397
Level 2 | U.S. Treasuries
Defined Benefit Plan Disclosure
Fair value of pension plan assets	216	202
Level 2 | U.S. Government agencies
Defined Benefit Plan Disclosure
Fair value of pension plan assets	1,400	1,713
Level 2 | Corporate debt securities
Defined Benefit Plan Disclosure
Fair value of pension plan assets	$ 3,655	$ 3,482

Employee benefit plans - Sala_4

Employee benefit plans - Salaries and Employee Benefits Expense - Investment Percentages (Details) - Pension Benefits - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure
Amount of company's common stock included in equity securities	$ 0	$ 0
Industry sector | Maximum
Defined Benefit Plan Disclosure
Maximum diversification (as a percent)	20.00%
Common equity securities.
Defined Benefit Plan Disclosure
Maximum diversification (as a percent)	10.00%
Cash equivalents
Defined Benefit Plan Disclosure
Defined benefit plan, target allocation (as a percent)	10.00%
Fixed income
Defined Benefit Plan Disclosure
Defined benefit plan, target allocation (as a percent)	40.00%
Equities
Defined Benefit Plan Disclosure
Defined benefit plan, target allocation (as a percent)	50.00%

Employee benefit plans - Sche_4

Employee benefit plans - Schedule of Benefit Payments Expected to be Paid (Details) - Pension Benefits $ in Thousands	Dec. 31, 2020USD ($)
Defined Benefit Plan Disclosure
2021	$ 840
2022	878
2023	896
2024	948
2025	970
Thereafter	$ 5,019

Income taxes - Current and Defe

Income taxes - Current and Deferred Amounts of Provision for Income Taxes Expense (Benefit) (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	Dec. 31, 2018
Income taxes
Current									$ 6,600	$ 2,761	$ 4,072
Deferred									(1,779)	394	(681)
Total income tax expense (benefit)	$ 1,308	$ 1,523	$ 1,311	$ 679	$ 446	$ 991	$ 957	$ 761	$ 4,821	$ 3,155	$ 3,391

Income taxes - Components of Ne

Income taxes - Components of Net Deferred Tax Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for loan losses	$ 5,742	$ 4,762
Lease liability	1,349	1,301
Defined benefit plan	1,108	815
Deferred compensation	789	682
Deferred loan fees	1,368	525
Other	170	137
Total	10,526	8,222
Deferred tax liabilities:
Lease right-of-use assets	1,319	1,286
Premises and equipment, net	1,455	1,350
Merger related accounting	694	850
Deferred loan costs	936	716
Investment securities available-for-sale	2,033	416
Other	321	242
Total	6,758	4,860
Net deferred tax asset	$ 3,768	$ 3,362

Income taxes - Reconciliation o

Income taxes - Reconciliation of Effective Income Tax Expense (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	Dec. 31, 2018
Income taxes
Federal income tax at statutory rate									$ 7,177	$ 6,067	$ 5,945
Tax exempt interest									(1,032)	(1,299)	(1,320)
Bank owned life insurance income									(299)	(159)	(236)
Residential housing program tax credits									(1,094)	(1,094)	(1,094)
Other, net									69	(360)	96
Total income tax expense (benefit)	$ 1,308	$ 1,523	$ 1,311	$ 679	$ 446	$ 991	$ 957	$ 761	$ 4,821	$ 3,155	$ 3,391
Federal income tax at statutory rate									21.00%	21.00%	21.00%
Tax exempt interest									(3.02%)	(4.50%)	(4.66%)
Bank owned life insurance income									(0.87%)	(0.55%)	(0.83%)
Residential housing program tax credits									(3.20%)	(3.79%)	(3.87%)
Other, net									0.19%	(1.25%)	0.34%
Total									14.10%	10.91%	11.98%

Parent Company financial stat_3

Parent Company financial statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents	$ 228,192	$ 31,153
Equity securities	138	423
Other assets	38,915	34,179
Total assets	2,883,802	2,475,327
Liabilities and Stockholders' Equity:
Subordinated debt	33,000
Accrued interest payable	736	1,277
Other liabilities	31,307	18,668
Stockholders' equity	316,877	299,010	$ 278,614	$ 264,976
Total liabilities and stockholders' equity	2,883,802	2,475,327
Peoples Bank
Assets:
Cash and cash equivalents	1,069	5,192	$ 3,736	$ 3,932
Equity securities	138	423
Investment in bank subsidiary	348,584	293,415
Other assets	273	19
Total assets	350,064	299,049
Liabilities and Stockholders' Equity:
Subordinated debt	33,000
Accrued interest payable	148
Other liabilities	39	39
Stockholders' equity	316,877	299,010
Total liabilities and stockholders' equity	$ 350,064	$ 299,049

Parent Company financial stat_4

Parent Company financial statements - Condensed Statements of Income (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	Dec. 31, 2018
Interest income:
Dividends from subsidiaries									$ 97	$ 84	$ 72
Net gain realized on sale of equity securities									(6)	132	14
Unrealized holding gains (losses) on equity securities									35	(132)
Expense:
Interest expense on subordinated debt									1,035
Interest expense on subordinated debt	$ 9,493	$ 9,835	$ 8,887	$ 5,960	$ 5,478	$ 8,139	$ 8,101	$ 7,173
Income tax benefit	1,308	1,523	1,311	679	446	991	957	761	4,821	3,155	3,391
Net income	$ 8,185	$ 8,312	$ 7,576	$ 5,281	$ 5,032	$ 7,148	$ 7,144	$ 6,412	29,354	25,736	24,920
Comprehensive Income									34,708	30,607	23,648
Peoples Bank
Interest income:
Dividends from subsidiaries									10,518	10,131	9,691
Other income									8	8	72
Net gain realized on sale of equity securities									29
Unrealized holding gains (losses) on equity securities									(35)	132	13
Total income									10,520	10,271	9,776
Expense:
Interest expense on subordinated debt									1,035
Other expenses									200	145	214
Total expenses									1,235	145	214
Interest expense on subordinated debt									9,285	10,126	9,562
Income tax benefit									(255)	(1)	(27)
Income before undistributed income of subsidiaries									9,540	10,127	9,589
Equity in undistributed net income of subsidiaries									19,814	15,609	15,331
Net income									$ 29,354	$ 25,736	$ 24,920

Parent Company financial stat_5

Parent Company financial statements - Condensed Statements 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	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 8,185	$ 8,312	$ 7,576	$ 5,281	$ 5,032	$ 7,148	$ 7,144	$ 6,412	$ 29,354	$ 25,736	$ 24,920
Adjustments:
Decrease in other assets									(12,268)	(3,363)	816
Increase (decrease) in other liabilities									13,549	2,389	(1,736)
Stock based compensation									570	554	272
Net cash provided by operating activities									37,180	37,079	32,626
Cash flows from investing activities:
Net cash used in investing activities									(201,240)	(184,721)	(134,806)
Cash flows used in financing activities:
Proceeds from long-term debt										16,000
Retirement of common stock									(6,893)	(634)
Net cash provided by financing activities									361,099	146,179	97,308
Increase (decrease) in cash									197,039	(1,463)	(4,872)
Cash and cash equivalents at beginning of period				31,153					31,153
Cash and cash equivalents at end of period	228,192				31,153				228,192	31,153
Peoples Bank
Cash flows from operating activities:
Net income									29,354	25,736	24,920
Adjustments:
Net losses (gains) on investment securities									6	(132)	(14)
Undistributed net income of subsidiaries	(19,814)				(15,609)				(19,814)	(15,609)	(15,331)
Decrease in other assets									(255)	(302)	(106)
Increase (decrease) in other liabilities									148		(10)
Stock based compensation									570	554	272
Increase in due from subsidiaries										1,974
Net cash provided by operating activities									10,009	12,221	9,731
Cash flows from investing activities:
Purchase of equity securities											(234)
Sale of equity securities									279
Net cash used in investing activities									279		(234)
Cash flows used in financing activities:
Investment in subsidiary									(30,000)
Retirement of common stock									(6,893)	(634)
Cash dividends paid									(10,518)	(10,131)	(9,693)
Net cash provided by financing activities									(14,411)	(10,765)	(9,693)
Increase (decrease) in cash									(4,123)	1,456	(196)
Cash and cash equivalents at beginning of period				$ 5,192				$ 3,736	5,192	3,736	3,932
Cash and cash equivalents at end of period	$ 1,069				$ 5,192				1,069	$ 5,192	$ 3,736
Subordinated Debentures
Cash flows used in financing activities:
Proceeds from long-term debt									33,000
Subordinated Debentures | Peoples Bank
Cash flows used in financing activities:
Proceeds from long-term debt									$ 33,000

Regulatory matters - Additional

Regulatory matters - Additional Information (Details) - USD ($)	Jan. 01, 2016	Dec. 31, 2020	Dec. 31, 2019
Schedule of Capitalization
Capital stock (as a percent)		100.00%
Period over which the Company may only declare and pay dividends out of accumulated net earnings, including accumulated net earnings acquired as a result of a merger		7 years
Funds available for transfers		$ 31,002,000
Loans outstanding		$ 0	$ 0
Capital conservation buffer	2.50%
Maximum
Schedule of Capitalization
Net earnings which must set aside as a surplus (as a percent)		10.00%
Minimum
Schedule of Capitalization
Net earnings to surplus funds (as a percent)		10.00%

Regulatory matters - Schedule o

Regulatory matters - Schedule of Bank's Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Consolidated
Common equity Tier 1 capital to risk-weighted assets
Common equity Tier 1 capital to risk-weighted assets, Actual Amount	$ 250,397	$ 237,280
Common equity Tier 1 capital to risk-weighted assets, Actual Ratio	12.16	11.90
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 92,631	$ 89,717
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	4.50	4.50
Tier 1 capital to risk-weighted assets
Tier 1 capital to risk-weighted assets, Actual Amount	$ 250,397	$ 237,280
Tier 1 capital to risk-weighted assets, Actual Ratio	12.16	11.90
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 123,508	$ 119,623
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	6	6
Total capital to risk-weighted assets
Total capital to risk-weighted assets, Actual Amount	$ 310,741	$ 259,957
Total capital to risk-weighted assets, Actual Ratio	15.10	13.04
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 164,677	$ 159,497
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	8	8
Tier 1 capital to average assets
Tier 1 capital to average assets, Actual Amount	$ 250,397	$ 237,280
Tier 1 capital to average assets, Actual Ratio	9.28	10.14
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount	$ 107,878	$ 93,633
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio	4	4
Peoples Bank
Common equity Tier 1 capital to risk-weighted assets
Common equity Tier 1 capital to risk-weighted assets, Actual Amount	$ 282,104	$ 231,685
Common equity Tier 1 capital to risk-weighted assets, Actual Ratio	13.73	11.64
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 92,461	$ 89,576
Common equity Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	4.50	4.50
Common equity Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 133,554	$ 129,387
Common equity Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	6.50	6.50
Tier 1 capital to risk-weighted assets
Tier 1 capital to risk-weighted assets, Actual Amount	$ 282,104	$ 231,685
Tier 1 capital to risk-weighted assets, Actual Ratio	13.73	11.64
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 123,281	$ 119,434
Tier 1 capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	6	6
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 164,374	$ 159,246
Tier 1 capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	8	8
Total capital to risk-weighted assets
Total capital to risk-weighted assets, Actual Amount	$ 307,807	$ 254,362
Total capital to risk-weighted assets, Actual Ratio	14.98	12.78
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Amount	$ 164,374	$ 159,246
Total capital to risk-weighted assets, Minimum For Capital Adequacy Purposes Ratio	8	8
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 205,468	$ 199,057
Total capital to risk-weighted assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	10	10
Tier 1 capital to average assets
Tier 1 capital to average assets, Actual Amount	$ 282,104	$ 231,685
Tier 1 capital to average assets, Actual Ratio	10.08	9.91
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Amount	$ 111,891	$ 93,508
Tier 1 capital to average assets, Minimum For Capital Adequacy Purposes Ratio	4	4
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 139,864	$ 116,884
Tier 1 capital to average assets, Minimum to be Well Capitalized under Prompt Corrective Action Provisions Ratio	5	5

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss)
Net unrealized gain on investment securities available-for-sale	$ 9,696	$ 1,835
Income tax	2,036	385
Net of income taxes	7,660	1,450
Benefit plan adjustments	(7,977)	(6,579)
Income tax benefit	(1,675)	(1,382)
Net of income taxes	(6,302)	(5,197)
Derivative adjustments	1,002	687
Income tax	211	144
Net of income taxes	791	543
Accumulated other comprehensive income (loss)	$ 2,149	$ (3,205)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Loss and Related Tax Effects (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss)
Unrealized gain (loss) on investment securities available-for-sale	$ 8,779	$ 5,109	$ (2,014)
Net gain on the sale of investment securities available-for-sale	(918)	(23)
Other comprehensive income on available-for-sale debt securities	7,861	5,086	(2,014)
Amortization of actuarial loss (2)	218	227	194
Actuarial gain (loss)	(1,616)	412	(785)
Change in benefit plan liabilities	(1,398)	639	(591)
Net change in derivatives	315	441	246
Other comprehensive income (loss)	6,778	6,166	(2,359)
Income tax (benefit)	1,424	1,295	(496)
Other comprehensive income (loss)	$ 5,354	$ 4,871	$ (1,863)

Summary of quarterly financia_3

Summary of quarterly financial information - Summary of Quarterly Financial Information (unaudited) (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	Dec. 31, 2018
Summary of quarterly financial information (unaudited)
Interest income	$ 23,085	$ 23,346	$ 23,852	$ 23,842	$ 23,616	$ 23,632	$ 23,332	$ 22,801	$ 94,125	$ 93,381	$ 84,661
Interest expense	3,276	3,422	3,345	4,281	4,364	4,396	4,604	4,504	14,324	17,868	13,322
Net interest income	19,809	19,924	20,507	19,561	19,252	19,236	18,728	18,297	79,801	75,513	71,339
Provision for loan losses	1,050	1,050	1,800	3,500	4,000	700	350	1,050	7,400	6,100	4,200
Net interest income after provision for loan losses	18,759	18,874	18,707	16,061	15,252	18,536	18,378	17,247	72,401	69,413	67,139
Noninterest income	4,735	4,935	3,422	3,550	3,870	3,682	4,152	3,416	16,642	15,120	13,659
Noninterest expense	14,001	13,974	13,242	13,651	13,644	14,079	14,429	13,490	54,868	55,642	52,487
Income before income taxes	9,493	9,835	8,887	5,960	5,478	8,139	8,101	7,173
Income tax expense	1,308	1,523	1,311	679	446	991	957	761	4,821	3,155	3,391
Net income	$ 8,185	$ 8,312	$ 7,576	$ 5,281	$ 5,032	$ 7,148	$ 7,144	$ 6,412	$ 29,354	$ 25,736	$ 24,920
Per share data:
Net income - basic	$ 1.13	$ 1.14	$ 1.03	$ 0.72	$ 0.68	$ 0.97	$ 0.96	$ 0.87	$ 4.02	$ 3.48	$ 3.37
Net income - diluted	1.13	1.13	1.03	0.71	0.68	0.96	0.96	0.87	4	3.47	$ 3.37
Cash dividends declared	$ 0.36	$ 0.36	$ 0.36	$ 0.36	$ 0.35	$ 0.34	$ 0.34	$ 0.34	$ 0.36	$ 0.35
Average common shares outstanding - basic	7,222,810	7,277,189	7,341,636	7,379,438	7,388,488	7,394,992	7,399,302	7,379,438	7,304,956	7,395,429	7,397,797
Average common shares outstanding - diluted	7,257,874	7,312,253	7,376,700	7,405,703	7,410,899	7,417,403	7,413,114	7,408,536	7,337,843	7,412,369	7,402,900