Peoples Financial Services (PFIS) 10-Q 5 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 31, 2021
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Entity File Number	001-36388
Entity Registrant Name	PEOPLES FINANCIAL SERVICES CORP.
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
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		7,172,722
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001056943
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Cash and due from banks:
Cash and due from banks	$ 33,662	$ 29,287
Interest-bearing deposits in other banks	7,425	15,905
Federal funds sold	319,500	183,000
Total cash and due from banks	360,587	228,192
Investment securities:
Available-for-sale	461,372	295,911
Equity investments carried at fair value	147	138
Held-to-maturity: Fair value September 30, 2021, $32,556; December 31, 2020, $7,513	32,848	7,225
Total investment securities	494,367	303,274
Loans	2,205,661	2,177,982
Less: allowance for loan losses	26,693	27,344
Net loans	2,178,968	2,150,638
Loans held for sale	997	837
Premises and equipment, net	50,682	47,045
Accrued interest receivable	8,280	8,255
Goodwill	63,370	63,370
Intangible assets, net	584	960
Bank owned life insurance	42,734	42,316
Other assets	32,956	38,915
Total assets	3,233,525	2,883,802
Deposits:
Noninterest-bearing	712,601	622,475
Interest-bearing	2,128,318	1,814,638
Total deposits	2,840,919	2,437,113
Short-term borrowings	0	50,000
Long-term debt	3,235	14,769
Subordinated debentures	33,000	33,000
Accrued interest payable	872	736
Other liabilities	27,767	31,307
Total liabilities	2,905,793	2,566,925
Stockholders' equity:
Common stock, par value $2.00, authorized 25,000,000 shares, issued and outstanding 7,177,028 shares at September 30, 2021 and 7,215,202 shares at December 31, 2020	14,356	14,431
Capital surplus	127,826	129,274
Retained earnings	190,061	171,023
Accumulated other comprehensive income (loss)	(4,511)	2,149
Total stockholders' equity	327,732	316,877
Total liabilities and stockholders' equity	$ 3,233,525	$ 2,883,802

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position
Held-to-maturity, Fair value	$ 32,556	$ 7,513
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	7,177,028	7,215,202
Common stock, shares outstanding	7,177,028	7,215,202

Consolidated Statements of Inco

Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest and fees on loans:
Taxable	$ 21,276	$ 20,901	$ 62,205	$ 62,978
Tax-exempt	1,024	876	2,859	2,848
Interest and dividends on investment securities:
Taxable	1,285	1,250	3,804	4,223
Tax-exempt	432	280	1,233	874
Dividends	24	23	72	71
Interest on interest-bearing deposits in other banks	2	4	6	27
Interest on federal funds sold	124	12	228	19
Total interest income	24,167	23,346	70,407	71,040
Interest expense:
Interest on deposits	1,698	2,758	5,731	9,125
Interest on short-term borrowings	1	82	78	757
Interest on long-term debt	40	139	225	575
Interest on subordinated debt	443	443	1,330	591
Total interest expense	2,182	3,422	7,364	11,048
Net interest income	21,985	19,924	63,043	59,992
Provision for loan losses	400	1,050		6,350
Net interest income after provision for loan losses	21,585	18,874	63,043	53,642
Noninterest income:
Mortgage banking income	244	488	764	937
Increase in cash surrender value of life insurance	225	192	669	572
Interest rate swap revenue	79	1,228	744	1,947
Net gain (loss) on equity investment securities	5	2	9	(82)
Net gain on sale of investment securities available-for-sale		457		724
Total noninterest income	3,449	4,935	10,353	11,907
Noninterest expense:
Salaries and employee benefits expense	7,829	7,831	21,649	22,735
Net occupancy and equipment expense	3,150	3,131	9,464	9,252
Amortization of intangible assets	125	154	375	462
Professional fees and outside services	629	617	1,645	1,593
FDIC insurance and assessments	305	241	836	651
Donations	366	340	1,084	1,019
Other expenses	1,887	1,660	5,395	5,155
Total noninterest expense	14,291	13,974	40,448	40,867
Income before income taxes	10,743	9,835	32,948	24,682
Income tax expense	1,647	1,523	5,843	3,513
Net income	9,096	8,312	27,105	21,169
Other comprehensive income (loss):
Unrealized gain (loss) on investment securities available-for-sale	(3,130)	(639)	(8,409)	9,084
Reclassification adjustment for net gain on sales included in net income		(457)		(724)
Change in derivative fair value	(128)	(137)	(22)	356
Other comprehensive income (loss)	(3,258)	(1,233)	(8,431)	8,716
Income tax expense (benefit)	(684)	(259)	(1,771)	1,831
Other comprehensive income (loss), net of income taxes	(2,574)	(974)	(6,660)	6,885
Comprehensive income	$ 6,522	$ 7,338	$ 20,445	$ 28,054
Net income:
Basic	$ 1.26	$ 1.14	$ 3.76	$ 2.89
Diluted	$ 1.26	$ 1.14	$ 3.74	$ 2.87
Average common shares outstanding:
Basic	7,198,125	7,277,189	7,204,399	7,332,539
Diluted	7,233,189	7,312,253	7,239,463	7,364,693
Dividends declared	$ 0.38	$ 0.36	$ 1.12	$ 1.08
Service charges, fees and commissions
Noninterest income:
Revenue from contracts with customers	$ 1,667	$ 1,584	$ 4,476	$ 4,622
Merchant services income
Noninterest income:
Revenue from contracts with customers	158	137	759	723
Commission and fees on fiduciary activities
Noninterest income:
Revenue from contracts with customers	639	575	1,725	1,574
Wealth management income
Noninterest income:
Revenue from contracts with customers	$ 432	$ 272	$ 1,207	$ 890

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2019	$ 14,777	$ 135,251	$ 152,187	$ (3,205)	$ 299,010
Net income			5,281		5,281
Other comprehensive (loss) income, net of income taxes				6,633	6,633
Dividends declared			(2,662)		(2,662)
Stock based compensation		5			5
Share retirement	(107)	(2,097)			(2,204)
Balance at Mar. 31, 2020	14,670	133,159	154,806	3,428	306,063
Balance at Dec. 31, 2019	14,777	135,251	152,187	(3,205)	299,010
Net income					21,169
Other comprehensive (loss) income, net of income taxes					6,885
Balance at Sep. 30, 2020	14,468	130,038	165,437	3,680	313,623
Balance at Mar. 31, 2020	14,670	133,159	154,806	3,428	306,063
Net income			7,576		7,576
Other comprehensive (loss) income, net of income taxes				1,226	1,226
Dividends declared			(2,643)		(2,643)
Stock based compensation		186			186
Share retirement	(21)	(343)			(364)
Balance at Jun. 30, 2020	14,649	133,002	159,739	4,654	312,044
Net income			8,312		8,312
Other comprehensive (loss) income, net of income taxes				(974)	(974)
Dividends declared			(2,614)		(2,614)
Stock based compensation		192			192
Share retirement	(181)	(3,156)			(3,337)
Balance at Sep. 30, 2020	14,468	130,038	165,437	3,680	313,623
Balance at Dec. 31, 2020	14,431	129,274	171,023	2,149	316,877
Net income			9,478		9,478
Other comprehensive (loss) income, net of income taxes				(5,931)	(5,931)
Dividends declared			(2,665)		(2,665)
Stock based compensation		89			89
Share retirement	(26)	(491)			(517)
Common stock grants awarded, net of unearned compensation	18	(18)
Balance at Mar. 31, 2021	14,423	128,854	177,836	(3,782)	317,331
Balance at Dec. 31, 2020	14,431	129,274	171,023	2,149	316,877
Net income					27,105
Other comprehensive (loss) income, net of income taxes					(6,660)
Balance at Sep. 30, 2021	14,356	127,826	190,061	(4,511)	327,732
Balance at Mar. 31, 2021	14,423	128,854	177,836	(3,782)	317,331
Net income			8,531		8,531
Other comprehensive (loss) income, net of income taxes				1,845	1,845
Dividends declared			(2,665)		(2,665)
Stock based compensation		177			177
Share retirement	(16)	(312)			(328)
Balance at Jun. 30, 2021	14,407	128,719	183,702	(1,937)	324,891
Net income			9,096		9,096
Other comprehensive (loss) income, net of income taxes				(2,574)	(2,574)
Dividends declared			(2,737)		(2,737)
Stock based compensation		213			213
Share retirement	(51)	(1,106)			(1,157)
Balance at Sep. 30, 2021	$ 14,356	$ 127,826	$ 190,061	$ (4,511)	$ 327,732

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Statement of Stockholders' Equity
Dividends declared (in dollars per share)	$ 0.38	$ 0.37	$ 0.37	$ 0.36	$ 0.36	$ 0.36
Share retired, shares	25,699	7,828	13,101	90,165	10,383	53,746
Common stock grants awarded, net of unearned compensation			$ 182
Common stock grants awarded, net of unearned compensation (in shares)			9,192

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 27,105	$ 21,169
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	1,883	2,109
Amortization of right-of-use lease asset	320	313
Accretion of deferred loan fees, net	(4,636)	(1,079)
Amortization of intangibles	375	462
Amortization of low income housing partnerships	360	416
Provision for loan losses		6,350
Net unrealized (gain) loss on equity investment securities	(9)	82
Net gain on sale of other real estate owned	(125)	(15)
Loans originated for sale	(18,462)	(28,655)
Proceeds from sale of loans originated for sale	18,577	27,949
Net gain on sale of loans originated for sale	(275)	(469)
Net amortization of investment securities	875	825
Net gain on sale of investment securities available-for-sale		(724)
Gain on sale of premises and equipment	(20)
Increase in cash surrender value of life insurance	(669)	(572)
Deferred income tax expense	620	619
Stock based compensation	479	383
Net change in:
Accrued interest receivable	(25)	(1,614)
Other assets	313	(34,812)
Accrued interest payable	136	12
Other liabilities	(1,108)	10,842
Net cash provided by operating activities	25,714	3,591
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale		48,206
Proceeds from repayments of investment securities:
Available-for-sale	40,111	61,463
Held-to-maturity	367	336
Purchases of investment securities:
Available-for-sale	(214,856)	(18,313)
Held-to-maturity	(25,996)
Net redemption of restricted equity securities	1,481	4,656
Net increase in lending activities	(24,238)	(252,227)
Purchases of premises and equipment	(3,668)	(1,593)
Proceeds from the sale of premises and equipment	101
Investment in bank owned life insurance		(1,500)
Proceeds from bank owned life insurance	251
Proceeds from sale of other real estate owned	925	483
Net cash used in investing activities	(225,522)	(158,489)
Cash flows from financing activities:
Net increase in deposits	403,806	385,395
Repayment of long-term debt	(11,534)	(12,464)
Net decrease in short-term borrowings	(50,000)	(102,150)
Retirement of common stock	(2,002)	(5,905)
Cash dividends paid	(8,067)	(7,919)
Net cash provided by financing activities	332,203	289,957
Net increase in cash and cash equivalents	132,395	135,059
Cash and cash equivalents at beginning of period	228,192	31,153
Cash and cash equivalents at end of period	360,587	166,212
Cash paid during the period for:
Interest	7,228	7,614
Income taxes	5,600	4,350
Noncash items:
Transfers of loans to other real estate	545	730
Initial recognition of right-of-use assets	2,253	899
Initial recognition of lease liability	$ 2,253	899
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	9 Months Ended
	Sep. 30, 2021
Summary of significant accounting policies
Summary of significant accounting policies	1. Summary of significan t 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 (“the Bank”), collectively, the “Company” or “Peoples”. The Company services its retail and commercial customers through ​ Basis of presentation: ​ The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10-01 of Regulation S-X. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and results of operations for the periods presented have been included. All significant intercompany balances and transactions have been eliminated in consolidation. Prior-period amounts are reclassified when necessary to conform to the current year’s presentation. These reclassifications did not have any effect on the consolidated operating results or financial position of the Company. The consolidated operating results and financial position of the Company for the three and nine months ended and as of September 30, 2021, are not necessarily indicative of the results of consolidated operations and financial position that may be expected in the future. ​ 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, determination of other-than-temporary impairment losses on securities, and impairment of goodwill. Actual results could differ from those estimates. For additional information and disclosures required under GAAP, reference is made to the Company’s Annual Report on Form 10-K for the period ended December 31, 2020. ​ Significant events: COVID-19 ​ Operationally, as COVID-19 events unfold, our continued priority is the health and safety of our customers and employees. We continue to follow the recommendations of our state governments as to conducting business and continue to maintain safety protocols. Currently all our offices have returned to pre-pandemic operating hours with full lobby access. ​ On March 22, 2020, the federal banking agencies issued an “Interagency Statement on Loan Modifications and Reporting for Financial Institutions Working with Customers Affected by the Coronavirus.” The guidance explained that in consultation with the FASB staff the federal banking agencies concluded that short-term modifications (e.g. six months) made on a good faith basis to borrowers who were current as of the implementation date of a modification are not Troubled Debt Restructurings (“TDRs”). The Coronavirus Aid, Relief and Economic Security (“CARES”) Act was passed by Congress on March 27, 2020. Section 4013 of the CARES Act also addressed COVID-19 related modifications and specified that COVID-19 related modifications on loans that were not more than 30 days past due as of December 31, 2019 are not TDRs. On December 27, 2020, another COVID-19 relief bill was signed that extended this guidance until the earlier of January 1, 2022 or 60 days after the date on which the national emergency declared as a result of COVID-19 is terminated. During 2020, the Bank had applied this guidance and modified 479 commercial loans with an outstanding balance of $306.8 million and 512 consumer loans with an outstanding balance of $23.3 million. As of September 30, 2021, all of these modifications had expired and the loans returned to their contractual payment terms. ​ The CARES Act, as amended, included an allocation of $659 billion for loans to be issued by financial institutions through the Small Business Administration (“SBA”) Paycheck Protection Program (“PPP”). PPP loans are forgivable, in whole or in part, if the proceeds are used for payroll and other permitted purposes in accordance with the requirements of the PPP. These loans carry a fixed rate of 1.00% and a term of two years (loans made before June 5, 2020) or five years (loans made on or after June 5, 2020), if not forgiven, in whole or in part. Payments are deferred until either the date on which the SBA remits the amount of forgiveness proceeds to the lender or the date that is 10 months after the last day of the covered period if the borrower does not apply for forgiveness within that 10 month period. Through December 31, 2020, the Bank had originated 1,450 PPP loans totaling $217.5 million in principal, with an average loan size of $150,000 . The PPP loans originated during 2020 generated net fees totaling $5.2 million. These fees are deferred and accreted into interest income over the contractual period of 24 months or 60 months, as applicable. Upon SBA forgiveness, unamortized fees are then recognized into interest income. Participation in the PPP had a significant impact on the Bank’s asset mix and net interest income in 2020 and during the first nine months of 2021 and will continue to impact both asset mix and net interest income until these loans are forgiven or paid off. The initial PPP expired on August 8, 2020. Through December 31, 2020, PPP loans totaling $27.8 million had been forgiven by the SBA and a total of $2.3 million in PPP net fees had been recognized by the Bank. ​ On December 27, 2020, another COVID-19 relief bill was signed that extended and modified several provisions of the PPP. This included an additional allocation of $284 billion. The SBA reactivated the PPP on January 11, 2021. The Bank originated additional loans through the PPP, which expired on May 31, 2021. In the nine months ended September 30, 2021, the Bank had generated and received SBA approval on 1,062 PPP loans totaling $121.6 million and generated $4.3 million in related deferred PPP net fees. In the nine months ended September 30, 2021, PPP loans totaling $227.8 million had been forgiven by the SBA and a total of $4.9 million in PPP net fees had been recognized by the Bank including fees recognized upon forgiveness and continuing amortization of fees from the 2020 and 2021 PPP originations. At September 30, 2021, PPP loan balances total $83.5 million with remaining unamortized fees of $2.3 million. We expect the majority of the loans to be forgiven and the net fees recognized into income over the next six months . ​ Fourth Quarter Dividend Decl aration ​ On October 29, 2021, the Board of Directors declared a fourth quarter dividend of $0.38 per share. The dividend is payable December 15, 2021 to shareholders of record November 30, 2021. ​ Visa Class B Common Stock Sale ​ On October 8, 2021, Peoples’ banking subsidiary, Peoples Security Bank and Trust Company (the “Bank”), agreed to sell its 44,982 shares of the Class B common stock of Visa Inc. for a purchase price of $12.2 million. The shares had no carrying value on the Bank’s balance sheet and, as the Bank had no historical cost basis in the shares, the entire purchase price will be realized as a pretax gain. ​ The Bank received 73,333 Class B shares of Visa Inc. as part of its membership interest in March 2008, and 28,351 shares were redeemed in connection with Visa’s initial public offering in 2008. The sale of the remaining 44,982 Class B shares settled in October, 2021 and will be included in our 2021 fourth-quarter and year-end results as an after-tax gain of $9.6 million. The gain on the sale of the Class B shares is not indicative of the expected results of consolidated operations for those periods. ​ Recent accounting standards: ​ From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board ("FASB") or other standard setting bodies that are adopted by the Company as of the required effective dates. The following should be read in conjunction with "Note 1 Summary of significant accounting policies" of the Notes to the Consolidated Financial Statements included in the Company’s annual report on Form 10-K for the year ended December 31, 2020. Unless otherwise discussed, management believes the impact of any recently issued standards, including those issued but not yet effective, will not have a material impact on the Company’s consolidated financial statements. ​ In June 2016, the 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 significant 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. At the relevant time, the Company qualified as a smaller reporting company 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 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 Bank'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. ​

Other comprehensive income (los

Other comprehensive income (loss)	9 Months Ended
	Sep. 30, 2021
Other comprehensive income (loss)
Other comprehensive income (loss)	2. 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, benefit plan adjustments and adjustments to derivative fair values. ​ The components of accumulated other comprehensive income (loss) included in stockholders’ equity at September 30, 2021 and December 31, 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Net unrealized gain on investment securities available-for-sale ​ $ 1,287 ​ $ 9,696 ​ Income tax expense ​ 270 ​ 2,036 ​ Net of income taxes ​ 1,017 ​ 7,660 ​ Benefit plan adjustments ​ (7,977) ​ (7,977) ​ Income tax benefit ​ (1,675) ​ (1,675) ​ Net of income taxes ​ (6,302) ​ (6,302) ​ Derivative adjustments ​ 980 ​ 1,002 ​ Income tax ​ 206 ​ 211 ​ Net of income taxes ​ 774 ​ 791 ​ Accumulated other comprehensive income (loss) ​ $ (4,511) ​ $ 2,149 ​ ​

Earnings per share

Earnings per share	9 Months Ended
	Sep. 30, 2021
Earnings per share
Earnings per share	​ 3. 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. ​ The following table presents the calculation of both basic and diluted earnings per share of common stock for the three and nine months ended September 30, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ For the Three Months Ended September 30, Basic Diluted Basic Diluted Net income $ 9,096 $ 9,096 $ 8,312 $ 8,312 Average common shares outstanding ​ 7,198,125 ​ 7,233,189 ​ 7,277,189 ​ 7,312,253 ​ Earnings per share ​ $ 1.26 ​ $ 1.26 ​ $ 1.14 ​ $ 1.14 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ For the Nine Months Ended September 30, ​ Basic ​ Diluted ​ Basic ​ Diluted ​ Net income $ 27,105 $ 27,105 $ 21,169 ​ $ 21,169 Average common shares outstanding ​ 7,204,399 ​ 7,239,463 ​ 7,332,539 ​ 7,364,693 ​ Earnings per share ​ $ 3.76 ​ $ 3.74 ​ $ 2.89 ​ $ 2.87 ​ ​

Investment securities

Investment securities	9 Months Ended
	Sep. 30, 2021
Investment securities
Investment securities	4. Investment securities: ​ The amortized cost and fair value of investment securities aggregated by investment category at September 30, 2021 and December 31, 2020 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair September 30, 2021 Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 135,816 ​ $ 191 ​ $ 610 ​ $ 135,397 ​ U.S. government-sponsored enterprises ​ ​ 40,969 ​ ​ 621 ​ ​ ​ ​ ​ 41,590 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 66,535 ​ ​ 1,315 ​ ​ 949 ​ 66,901 ​ Tax-exempt ​ 89,124 ​ 2,389 ​ ​ 1,028 ​ 90,485 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 2,087 ​ 71 ​ ​ ​ ​ 2,158 ​ U.S. government-sponsored enterprises ​ 109,992 ​ 1,199 ​ 2,471 ​ 108,720 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 12,562 ​ 598 ​ ​ ​ 13,160 ​ Corporate debt securities ​ ​ 3,000 ​ ​ ​ ​ ​ 39 ​ ​ 2,961 ​ Total ​ $ 460,085 ​ $ 6,384 ​ $ 5,097 ​ $ 461,372 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 10,384 ​ $ 146 ​ $ 59 ​ $ 10,471 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 11,361 ​ ​ ​ ​ 195 ​ 11,166 ​ U.S. government-sponsored enterprises ​ 11,103 ​ 4 ​ ​ 188 ​ 10,919 ​ Total ​ $ 32,848 ​ $ 150 ​ $ 442 ​ $ 32,556 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ Equity Securities ​ At September 30, 2021, our equity security portfolio consisted of stock of one financial institution. At September 30, 2021 and December 31, 2020, we had $147 and $138 respectively, in equity securities recorded at fair value. At September 30, 2021, the fair value of our equity portfolio was lower than the cost basis by $6. The following is a summary of unrealized and realized gains and losses recognized in net income on equity securities during the three and nine months ended September 30, 2021 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ 2021 ​ 2020 Net gain recognized during the period on equity securities ​ $ 5 ​ $ 2 Less: Net gain (loss) recognized during the period on equity securities sold during the period ​ ​ ​ ​ Unrealized gain recognized during the reporting period on equity securities still held at the reporting date ​ $ 5 ​ $ 2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Nine Months Ended September 30, ​ 2021 ​ 2020 Net gain (loss) recognized during the period on equity securities ​ $ 9 ​ $ (82) Less: Net gain (loss) recognized during the period on equity securities sold during the period ​ ​ ​ ​ Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date ​ $ 9 ​ $ (82) ​ Restricted Investment In Stock ​ Restricted investment in stock includes Federal Home Loan Bank (“FHLB”) stock with a carrying cost of $3,874 and $5,355 at September 30, 2021 and December 31, 2020, respectively, Atlantic Community Bankers Bank (“ACBB”) stock with a carrying cost of $42 at September 30, 2021 and December 31, 2020, respectively, and VISA Class B stock with a carrying cost of $0 at September 30, 2021 and December 31, 2020, which are included in other assets in the consolidated balance sheets. FHLB and ACBB stock was issued as a requirement to facilitate participation in borrowing and other banking services. The investment in FHLB stock may fluctuate, as it is based on the member bank’s use of FHLB’s services. ​ On October 8, 2021, Peoples’ banking subsidiary, Peoples Security Bank and Trust Company (the “Bank”), agreed to sell its 44,982 shares of the Class B common stock of Visa Inc. for a purchase price of $12.2 million. ​ These restricted investments are carried at cost and evaluated for other-than-temporary impairment (“OTTI”) periodically. As of September 30, 2021, there was no OTTI associated with these investments. ​ The maturity distribution of the fair value, which is the net carrying amount, of the debt securities classified as available-for-sale at September 30, 2021, is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ Fair September 30, 2021 Value Within one year ​ $ 38,277 ​ After one but within five years ​ 95,877 ​ After five but within ten years ​ 93,524 ​ After ten years ​ 106,538 ​ ​ ​ 334,216 ​ Mortgage-backed and other amortizing securities ​ 127,156 ​ Total ​ $ 461,372 ​ ​ The maturity distribution of the amortized cost and fair value, of debt securities classified as held-to-maturity at September 30, 2021, is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair September 30, 2021 Cost Value After five but within ten years ​ $ 5,940 ​ $ 5,938 ​ After ten years ​ ​ 4,444 ​ ​ 4,533 ​ ​ ​ 10,384 ​ 10,471 ​ Mortgage-backed securities ​ 22,464 ​ 22,085 ​ Total ​ $ 32,848 ​ $ 32,556 ​ ​ Securities with a carrying value of $195,104 and $165,982 at September 30, 2021 and December 31, 2020, respectively, were pledged to secure public deposits and certain other deposits as required or permitted by law. ​ 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 September 30, 2021 and December 31, 2020, 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 September 30, 2021 and December 31, 2020, 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 September 30, 2021 Value Losses Value Losses Value Losses U.S. Treasury securities $ 102,789 $ 610 ​ ​ ​ ​ $ 102,789 $ 610 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ ​ 29,122 ​ ​ 771 ​ $ 4,283 ​ $ 178 ​ $ 33,405 ​ $ 949 ​ Tax-exempt ​ ​ 52,825 ​ ​ 1,087 ​ ​ ​ ​ ​ ​ ​ ​ 52,825 ​ ​ 1,087 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ 11,279 ​ ​ 195 ​ ​ ​ ​ ​ ​ ​ $ 11,279 ​ $ 195 ​ U.S. government-sponsored enterprises ​ ​ 89,214 ​ ​ 2,502 ​ ​ 7,069 ​ ​ 157 ​ ​ 96,283 ​ 2,659 ​ Corporate debt securities ​ ​ 2,961 ​ ​ 39 ​ ​ ​ ​ ​ ​ ​ ​ 2,961 ​ ​ 39 ​ Total ​ $ 288,190 ​ $ 5,204 ​ $ 11,352 ​ $ 335 ​ $ 299,542 ​ $ 5,539 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ Management, from a credit risk perspective, has taken action to identify and assess its COVID-19 related credit exposures based on asset class. No specific COVID-19 related credit impairment was identified within our investment securities portfolio, including our municipal securities, during the first nine months of 2021. The Company had twenty mortgage-backed securities, sixty-five tax-exempt municipals, thirty-three taxable municipals and five corporate bonds that were in unrealized loss positions at September 30, 2021. Of these securities, four mortgage-backed securities and four taxable municipals 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 known 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 September 30, 2021. There was no OTTI recognized for the three or nine months ended September 30, 2021 and 2020.

Loans, net and allowance for lo

Loans, net and allowance for loan losses	9 Months Ended
	Sep. 30, 2021
Loans, net and allowance for loan losses
Loans, net and allowance for loan losses	5. Loans, net and allowance for loan losses: ​ The major classifications of loans outstanding, net of deferred loan origination fees and costs at September 30, 2021 and December 31, 2020 are summarized as follows. The Company had net deferred loan origination fees of $1,785 and $2,058 at September 30, 2021 and December 31, 2020, respectively. Net deferred loan origination fees remaining related to PPP loans is ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Commercial ​ $ 588,466 ​ $ 679,286 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,248,693 ​ 1,137,990 ​ Residential ​ 291,404 ​ 277,414 ​ Consumer ​ 77,098 ​ 83,292 ​ Total ​ $ 2,205,661 ​ $ 2,177,982 ​ ​ The PPP loans are included in the commercial loan classification and had an outstanding balance at September 30, 2021 of $83,521 comprised of $69,284 remaining from those originated during 2021 as part of round two and $14,237 remaining from loans originated during 2020 under round one of the program. At December 31,2020, PPP loans originated during 2020 had outstanding balances totaling $189,699. The PPP loans are risk rated ‘Pass’ and do not carry an allowance for loan losses due to a 100% SBA guarantee. The outstanding balance is considered current at September 30, 2021 and December 31, 2020. ​ The changes in the allowance for loan losses account by major classification of loan for the three and nine months ended September 30, 2021 and 2020 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2021 Commercial Commercial Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance July 1, 2021 ​ $ 8,520 ​ $ 14,281 ​ $ 3,069 ​ $ 869 ​ $ 26,739 ​ Charge-offs ​ (446) ​ (12) ​ ​ ​ (8) ​ (466) ​ Recoveries ​ 4 ​ 1 ​ ​ ​ 15 ​ 20 ​ Provisions (credits) ​ (164) ​ 519 ​ 92 ​ (47) ​ 400 ​ Ending balance ​ $ 7,914 ​ $ 14,789 ​ $ 3,161 ​ $ 829 ​ $ 26,693 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2020 Commercial Commercial Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance July 1, 2020 ​ $ 8,487 ​ $ 13,855 ​ $ 3,567 ​ $ 1,048 ​ $ 26,957 ​ Charge-offs ​ (1,354) ​ (66) ​ (71) ​ (51) ​ (1,542) ​ Recoveries ​ 51 ​ 14 ​ 9 ​ 45 ​ 119 ​ Provisions (credits) ​ 1,271 ​ (5) ​ (159) ​ (57) ​ 1,050 ​ Ending balance ​ $ 8,455 $ 13,798 ​ $ 3,346 ​ $ 985 ​ $ 26,584 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2021 Commercial Commercial Residential ​ Consumer ​ Total ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance January 1, 2021 $ 8,734 ​ $ 14,559 ​ $ 3,129 ​ $ 922 ​ $ 27,344 ​ Charge-offs (461) ​ (252) ​ (24) ​ (114) ​ (851) ​ Recoveries 83 ​ 67 ​ 2 ​ 48 ​ 200 ​ Provisions (credits) (442) ​ 415 ​ 54 ​ (27) ​ ​ ​ Ending balance $ 7,914 $ 14,789 ​ $ 3,161 ​ $ 829 ​ $ 26,693 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2020 Commercial Commercial Residential ​ Consumer ​ Total ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance January 1, 2020 ​ $ 6,888 ​ $ 11,496 ​ $ 3,226 ​ $ 1,067 ​ $ 22,677 ​ Charge-offs ​ (2,339) ​ (113) ​ (206) ​ (299) ​ (2,957) ​ Recoveries ​ 349 ​ 14 ​ 22 ​ 129 ​ 514 ​ Provisions ​ 3,557 ​ 2,401 ​ 304 ​ 88 ​ 6,350 ​ Ending balance ​ $ 8,455 ​ $ 13,798 ​ $ 3,346 ​ $ 985 ​ $ 26,584 ​ ​ The allocation of the allowance for loan losses and the related loans by major classifications of loans at September 30, 2021 and December 31, 2020 is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ September 30, 2021 Commercial Commercial Residential Consumer Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 7,914 ​ $ 14,789 $ 3,161 ​ $ 829 ​ $ 26,693 Ending balance: individually evaluated for impairment 18 ​ ​ 107 ​ ​ 41 ​ ​ ​ ​ 166 Ending balance: collectively evaluated for impairment $ 7,896 ​ $ 14,682 ​ $ 3,120 ​ $ 829 ​ $ 26,527 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 588,466 ​ $ 1,248,693 $ 291,404 ​ $ 77,098 ​ $ 2,205,661 Ending balance: individually evaluated for impairment ​ 1,058 ​ ​ 3,094 ​ ​ 1,431 ​ ​ 82 ​ 5,665 Ending balance: collectively evaluated for impairment ​ $ 587,408 ​ $ 1,245,599 ​ $ 289,973 ​ $ 77,016 ​ $ 2,199,996 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2020 Commercial Commercial Residential Consumer Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 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 loan 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 affected in the future. ​ 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 September 30, 2021 and December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 Pass Mention Substandard Doubtful Total Commercial ​ $ 584,020 ​ $ 2,889 ​ $ 1,557 ​ $ ​ ​ $ 588,466 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,229,908 ​ 13,013 ​ 5,772 ​ ​ ​ ​ 1,248,693 ​ Residential ​ 288,389 ​ 338 ​ 2,677 ​ ​ ​ ​ 291,404 ​ Consumer ​ 77,016 ​ ​ ​ 82 ​ ​ ​ ​ 77,098 ​ Total ​ $ 2,179,333 ​ $ 16,240 ​ $ 10,088 ​ $ ​ ​ $ 2,205,661 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ The decrease to special mention commercial loans is due to a payoff of a $12.9 million municipal related credit. The decrease in special mention commercial real estate loans resulted primarily from an upgrade to a $5.3 million credit due to a credit enhancement and satisfactory repayment history. The decrease to substandard commercial loans resulted primarily from a $1.5 million relationship that was paid off during the nine month period ended September 30, 2021. The decrease in substandard commercial real estate loans resulted from a refinance of a credit related to the hospitality industry that is secured by a seventy-five percent SBA guarantee. ​ Information concerning nonaccrual loans by major loan classification at September 30, 2021 and December 31, 2020 is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Commercial ​ $ 648 ​ $ 3,822 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,435 ​ 3,262 ​ Residential ​ 809 ​ 922 ​ Consumer ​ 82 ​ 111 ​ Total ​ $ 3,974 ​ $ 8,117 ​ ​ The decrease to non-accrual loans since year end was due primarily to a $1.5 million payoff and $1.0 million payoff of two unrelated commercial relationships, a $0.5 million total charge-off of a small business line of credit and a $0.5 million commercial real estate loan transferred to other real estate owned. ​ The major classifications of loans by past due status are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and September 30, 2021 ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 62 ​ $ 47 ​ $ 648 ​ $ 757 ​ $ 587,709 ​ $ 588,466 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 612 ​ ​ 311 ​ 2,465 ​ 3,388 ​ 1,245,305 ​ 1,248,693 ​ $ 30 ​ Residential ​ 317 ​ ​ 302 ​ ​ 857 ​ 1,476 ​ 289,928 ​ 291,404 ​ ​ 48 ​ Consumer ​ 450 ​ 78 ​ 82 ​ 610 ​ 76,488 ​ 77,098 ​ ​ ​ Total ​ $ 1,441 ​ $ 738 ​ $ 4,052 ​ $ 6,231 ​ $ 2,199,430 ​ $ 2,205,661 ​ $ 78 ​ ​ Improved credit quality resulted in lower levels of past due loans from year end. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ The following tables summarize information concerning impaired loans as of and for the three and nine months ended September 30, 2021 and September 30, 2020, and as of and for the year ended December 31, 2020 by major loan classification: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ This Quarter ​ Year-to-Date ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income Recorded ​ Income September 30, 2021 Investment Balance Allowance Investment Recognized Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 634 ​ $ 1,097 ​ ​ ​ ​ $ 870 ​ $ 2 ​ $ 1,166 ​ $ 9 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,560 ​ 3,275 ​ ​ ​ ​ 2,785 ​ 4 ​ 2,805 ​ 19 ​ Residential ​ 991 ​ 1,184 ​ ​ ​ ​ 999 ​ 5 ​ 1,051 ​ 15 ​ Consumer ​ 82 ​ 96 ​ ​ ​ ​ 79 ​ ​ ​ ​ 91 ​ ​ ​ ​ Total ​ 4,267 ​ 5,652 ​ ​ ​ ​ 4,733 ​ 11 ​ 5,113 ​ 43 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 424 ​ 424 ​ $ 18 ​ 695 ​ 5 ​ 1,354 ​ 15 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 534 ​ 564 ​ 107 ​ 604 ​ 4 ​ 875 ​ 14 ​ Residential ​ 440 ​ 446 ​ 41 ​ 450 ​ 3 ​ 445 ​ 10 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 1,398 ​ 1,434 ​ 166 ​ 1,749 ​ 12 ​ 2,674 ​ 39 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,058 ​ 1,521 ​ 18 ​ 1,565 ​ 7 ​ 2,520 ​ 24 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,094 ​ 3,839 ​ 107 ​ 3,389 ​ 8 ​ 3,680 ​ 33 ​ Residential ​ 1,431 ​ 1,630 ​ 41 ​ 1,449 ​ 8 ​ 1,496 ​ 25 ​ Consumer ​ 82 ​ 96 ​ ​ ​ 79 ​ ​ ​ 91 ​ ​ ​ Total ​ $ 5,665 ​ $ 7,086 ​ $ 166 ​ $ 6,482 ​ $ 23 ​ $ 7,787 ​ $ 82 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ This Quarter ​ Year-to-Date ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income Recorded ​ Income September 30, 2020 Investment Balance Allowance Investment Recognized Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 2,060 ​ $ 3,032 ​ ​ ​ ​ $ 2,491 ​ $ 3 ​ $ 3,081 ​ $ 28 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,146 ​ 2,749 ​ ​ ​ ​ 2,094 ​ ​ 3 ​ 2,092 ​ ​ 25 ​ Residential ​ 1,068 ​ 1,219 ​ ​ ​ ​ 1,092 ​ ​ 5 ​ 1,258 ​ ​ 15 ​ Consumer ​ 103 ​ 119 ​ ​ ​ ​ 132 ​ ​ ​ ​ 181 ​ ​ ​ ​ Total ​ 5,377 ​ 7,119 ​ ​ ​ ​ 5,809 ​ ​ 11 ​ 6,612 ​ ​ 68 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,679 ​ 2,713 ​ $ 1,113 ​ 2,583 ​ ​ 6 ​ 2,036 ​ ​ 12 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,015 ​ 2,254 ​ 179 ​ 2,232 ​ 18 ​ 1,714 ​ 18 ​ Residential ​ 711 ​ 795 ​ 92 ​ 761 ​ 3 ​ 666 ​ 10 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 5,405 ​ 5,762 ​ 1,384 ​ 5,576 ​ 27 ​ 4,416 ​ 40 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,739 ​ 5,745 ​ 1,113 ​ 5,074 ​ 9 ​ 5,117 ​ 40 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,161 ​ 5,003 ​ 179 ​ 4,326 ​ 21 ​ 3,806 ​ 43 ​ Residential ​ 1,779 ​ 2,014 ​ 92 ​ 1,853 ​ 8 ​ 1,924 ​ 25 ​ Consumer ​ 103 ​ 119 ​ ​ ​ ​ 132 ​ ​ ​ ​ 181 ​ ​ ​ ​ Total ​ $ 10,782 ​ $ 12,881 ​ $ 1,384 ​ $ 11,385 ​ $ 38 ​ $ 11,028 ​ $ 108 ​ ​ Loan Modifications/Troubled Debt Restructurings/COVID-19 Included in the commercial loan and commercial and residential real estate categories are troubled debt restructurings that are classified as impaired. Troubled debt restructurings totaled $2,560 at September 30, 2021, $2,818 at December 31, 2020 and $3,004 at September 30, 2020. ​ 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 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. ​ ● 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. ​ There were no loans modified as troubled debt restructurings during the three and nine months ended September 30, 2021. The following table provides the number of loans modified in a trouble debt restructuring and the pre- and post-modification recorded during the three and nine months ended September 30, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Three Months Ended September 30, 2020 ​ For the Nine Months Ended September 30, 2020 ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ Pre-Modification ​ ​ Post-Modification ​ ​ Number ​ Recorded ​ Recorded ​ Number ​ ​ Recorded ​ ​ Recored ​ ​ of Loans Investment Investment of Loans ​ Investment ​ Investment Commercial real estate ​ ​ ​ $ ​ ​ $ ​ ​ 3 ​ $ 1,073 ​ $ 1,073 Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ 1 ​ ​ 12 ​ ​ 12 Total ​ ​ ​ $ ​ ​ $ ​ 4 ​ $ 1,085 ​ $ 1,085 ​ During the three and nine months ended September 31, 2021, there were no payment defaults on troubled debt restructurings. During the three and nine months ended September 30, 2020, there was one payment default on a residential real estate loan in the amount of $52. ​ The Company received a significant number of requests to modify loan terms and/or defer principal and/or interest payments, and agreed to many such deferrals during 2020. 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 applied this guidance. Similarly, FASB 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 COVID-19 related requests for temporary modifications to the repayment structure for borrower loans. As of September 30, 2021, all loans have returned to original repayment terms.

Other assets

Other assets	9 Months Ended
	Sep. 30, 2021
Other assets
Other assets	6. Other assets: ​ The components of other assets at September 30, 2021, and December 31, 2020 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Other real estate owned ​ $ 610 ​ $ 864 ​ Investment in low income housing partnership ​ 5,972 ​ 6,332 ​ Mortgage servicing rights ​ 846 ​ 838 ​ Restricted equity securities (FHLB and other) ​ 3,916 ​ 5,397 ​ Net deferred tax asset ​ ​ 4,918 ​ ​ 3,768 ​ Interest rate floor ​ ​ 1,159 ​ ​ 1,678 ​ Interest rate swaps ​ ​ 9,531 ​ ​ 13,693 ​ Other assets ​ 6,004 ​ 6,345 ​ Total ​ $ 32,956 ​ $ 38,915 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Fair value estimates

Fair value estimates	9 Months Ended
	Sep. 30, 2021
Fair value estimates
Fair value estimates	7. Fair value estimates: ​ 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. ​ In accordance with FASB ASC 820, “Fair Value Measurements and Disclosures,” 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. ​ An asset’s or liability’s placement in the fair value hierarchy is based on the lowest level of input that is significant to the fair value estimate. ​ During the periods ended September 30, 2021 and December 31, 2020 there were no transfers in or out of Level 3 . ​ The following methods and assumptions were used by the Company to calculate fair values and related carrying amounts of financial instruments: ​ Investment securities: ​ Loans held for sale: ​ Interest rate swaps and options: ​ ​ Assets and liabilities measured at fair value on a recurring basis at September 30, 2021 and December 31, 2020 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs September 30, 2021 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 135,397 $ 135,397 ​ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 41,590 ​ ​ ​ ​ $ 41,590 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 66,901 ​ ​ ​ ​ 66,901 ​ ​ ​ ​ Tax-exempt ​ 90,485 ​ ​ ​ ​ 90,485 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 2,158 ​ ​ ​ ​ 2,158 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 121,880 ​ ​ ​ ​ 121,880 ​ ​ ​ ​ Corporate debt securities ​ ​ 2,961 ​ ​ ​ ​ ​ 2,961 ​ ​ ​ ​ Common equity securities ​ ​ 147 ​ ​ 147 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 461,519 ​ $ 135,544 ​ $ 325,975 ​ $ ​ ​ Loan held for sale ​ $ 997 ​ ​ ​ ​ $ 997 ​ ​ ​ ​ Interest rate floor-other assets ​ $ 1,159 ​ ​ ​ ​ $ 1,159 ​ ​ ​ ​ Interest rate swap-other assets ​ $ 9,531 ​ ​ ​ ​ $ 9,531 ​ ​ ​ ​ Interest rate swap-other liabilities ​ $ (9,277) ​ ​ ​ ​ $ (9,277) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 296,049 ​ $ 19,043 ​ $ 277,006 ​ $ ​ ​ 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) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets and liabilities measured at fair value on a nonrecurring basis at September 30, 2021 and December 31, 2020 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable ​ ​ ​ ​ Identical Assets ​ Inputs ​ Inputs September 30, 2021 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 1,232 ​ ​ ​ ​ $ 1,232 ​ Other real estate owned ​ $ 487 ​ ​ ​ ​ ​ ​ ​ $ 487 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant Other ​ Significant ​ ​ ​ ​ Active Markets for ​ 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 values of impaired loans are 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. ​ 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 September 30, 2021 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 1,232 Appraisal of collateral Appraisal adjustments 21.6% to 97.0% (87.0)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.3)% ​ Other real estate owned ​ $ 487 Appraisal of collateral Appraisal adjustments 35.9% to 35.9% (35.9)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.0)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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)% ​ ​ 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 September 30, 2021 and December 31, 2020 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 September 30, 2021 Value Value (level 1) (level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 360,587 ​ $ 360,587 ​ $ 360,587 ​ ​ ​ ​ ​ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 461,372 ​ 461,372 ​ ​ 135,397 ​ $ 325,975 ​ ​ ​ ​ Common equity securities ​ ​ 147 ​ ​ 147 ​ ​ 147 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 32,848 ​ 32,556 ​ ​ ​ ​ 32,556 ​ ​ ​ ​ Loans held for sale ​ 997 ​ 997 ​ ​ ​ ​ 997 ​ ​ ​ ​ Net loans ​ 2,178,968 ​ 2,154,145 ​ ​ ​ ​ ​ ​ ​ $ 2,154,145 ​ Accrued interest receivable ​ 8,280 ​ 8,280 ​ ​ ​ ​ 8,280 ​ ​ ​ ​ Mortgage servicing rights ​ 846 ​ 1,282 ​ ​ ​ ​ 1,282 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ ​ 3,916 ​ 3,916 ​ ​ ​ ​ 3,916 ​ ​ ​ ​ Interest rate floor ​ ​ 1,159 ​ ​ 1,159 ​ ​ ​ ​ ​ 1,159 ​ ​ ​ ​ Interest rate swaps ​ 9,531 ​ 9,531 ​ ​ ​ ​ 9,531 ​ ​ ​ ​ Total ​ $ 3,058,651 ​ $ 3,033,972 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 2,840,919 ​ $ 2,842,487 ​ ​ ​ ​ $ 2,842,487 ​ ​ ​ ​ Long-term debt ​ 3,235 ​ 3,336 ​ ​ ​ ​ 3,336 ​ ​ ​ ​ Subordinated debentures ​ 33,000 ​ 32,660 ​ ​ ​ ​ 32,660 ​ ​ ​ ​ Accrued interest payable ​ ​ 872 ​ 872 ​ ​ ​ ​ ​ 872 ​ ​ ​ ​ Interest rate swaps ​ 9,277 ​ 9,277 ​ ​ ​ ​ ​ 9,277 ​ ​ ​ ​ Total ​ $ 2,887,303 ​ $ 2,888,632 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Employee benefit plans

Employee benefit plans	9 Months Ended
	Sep. 30, 2021
Employee benefit plans
Employee benefit plans	8. Employee benefit plans: ​ The Company provides an Employee Stock Ownership Plan (“ESOP”) and a Retirement Profit Sharing Plan. The Company also maintains Supplemental Executive Retirement Plans (“SERPs”) and an Employees’ Pension Plan, which is currently frozen. ​ For the three and nine months ended September 30, salaries and employee benefits expense includes approximately $343 and $991 in 2021, and $308 and $968 in 2020 relating to the employee benefit plans. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Three Months Ended September 30, 2021 2020 Components of net periodic pension benefit: ​ ​ ​ ​ Interest cost ​ $ 105 ​ $ 164 Expected return on plan assets ​ (322) ​ (371) Amortization of unrecognized net gain ​ 76 ​ 65 Net periodic benefit ​ $ (141) ​ $ (142) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Nine Months Ended September 30, 2021 2020 Components of net periodic pension benefit: ​ ​ ​ ​ Interest cost ​ $ 315 ​ $ 381 Expected return on plan assets ​ (966) ​ (865) Amortization of unrecognized net gain ​ 227 ​ 152 Net periodic benefit ​ $ (424) ​ $ (332) ​ 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 2017 Plan include directors, officers, employees, consultants and other service providers of the Company and its subsidiaries. As of September 30, 2021, there were 37,151 shares of the Company’s common stock available for grant as awards pursuant to the 2017 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. For the nine months ended September 30, 2021 and 2020, the Company granted awards of restricted stock and restricted stock units under the 2017 Plan, The non-performance restricted stock grants made in 2021, 2020 and 2019 vest equally over three years . The performance-based restricted stock units vest over three fiscal years 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 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 criterea. The Company classifies share-based compensation for employees within “salaries and employee benefits expense” on the consolidated statements of income and comprehensive income. The Company recognized net compensation costs of $213 and $479 for the three and nine months ended September 30, 2021 for awards granted under the 2017 Plan. The Company recognized compensation expense of $192 and $383 for the three and nine months ended September 30, 2020 for awards granted under the 2017 Plan. As of September 30, 2021, the Company had $1,068 of unrecognized compensation expense associated with restricted stock awards. The remaining cost is expected to be recognized over a weighted average vesting period of under 1.8 years.

Derivatives and hedging activit

Derivatives and hedging activities	9 Months Ended
	Sep. 30, 2021
Derivatives and hedging activities
Derivatives and hedging activities	9. 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. ​ 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. During the nine months ended September 30, 2021, the Company terminated the interest rate swap associated with floating-rate borrowings and accelerated the reclassification of amounts in other comprehensive income to earnings as a result of the hedged forecasted transactions becoming probable not to occur. The accelerated amount was a loss of $25. ​ 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 the next twelve months, the Company estimates that an additional $538 will be reclassified as an increase 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 September 30, 2021, the Company had 84 interest rate swaps with an aggregate notional amount of $396,154 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 September 30, 2021 and December 31, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Asset Derivatives ​ Asset Derivatives ​ Liability Derivatives ​ Liability Derivatives ​ ​ ​ ​ As of September 30, 2021 (1) ​ As of December 31, 2020 ​ As of September 30, 2021 (1) ​ As of December 31, 2020 ​ 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 ​ $ 1,159 ​ Other Assets ​ $ 1,678 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap $ 50,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Liabilities ​ $ ​ ​ Other Liabilities ​ $ 485 Total derivatives designated as hedging instruments ​ ​ ​ ​ ​ $ 1,159 ​ ​ ​ $ 1,678 ​ ​ ​ $ ​ ​ ​ ​ $ 485 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not ​ ​ ​ ​ ​ ​ Interest Rate Swaps (2) $ 396,154 ​ Other Assets $ 9,531 Other Assets $ 13,693 Other Liabilities $ 9,277 Other Liabilities ​ $ 13,614 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total derivatives not ​ ​ ​ $ 9,531 ​ $ 13,693 ​ $ 9,277 ​ $ 13,614 (1) Amounts include accrued interest . (2) Notional amount of interes t rate swaps at December 31, 2020 was $375,341 . ​ 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 September 30, 2021 and September 30, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ September 30, 2021 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ September 30, 2021 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap ​ $ 401 ​ $ 401 ​ ​ ​ ​ Interest Expense ​ $ (23) ​ $ (23) ​ ​ ​ Cash Flow Swap ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other expense ​ ​ (25) ​ ​ (25) ​ ​ ​ Interest Rate Floor (*) ​ $ (66) ​ $ (70) ​ $ 4 ​ Interest Income ​ $ 405 ​ $ 453 ​ $ (48) Total ​ $ 335 ​ $ 331 ​ $ 4 ​ ​ ​ $ 357 ​ $ 405 ​ $ (48) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap ​ $ (592) ​ $ (592) ​ ​ ​ ​ Interest Expense ​ $ 53 ​ $ 53 ​ ​ ​ Interest Rate Floor (*) ​ $ 124 ​ $ 146 ​ $ (22) ​ Interest Income ​ $ 279 ​ $ 327 ​ $ (48) Total ​ $ (468) ​ $ (446) ​ $ (22) ​ ​ ​ $ 332 ​ $ 380 ​ $ (48) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ * 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 for the three and nine months ended September 30, 2021 and September 30, 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) Recognized in ​ ​ ​ Income on Fair Value and Cash Flow Hedging ​ ​ ​ Relationships ​ ​ ​ For the three months ended September 30, ​ ​ ​ 2021 ​ ​ 2021 ​ ​ 2020 ​ ​ 2020 ​ 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 ​ $ 137 ​ ​ ​ ​ $ 133 ​ ​ (20) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 137 ​ ​ ​ ​ $ 133 ​ ​ (20) Amount of gain or (loss) reclassified from accumulated other comprehensive income into income as a result that a forecasted transaction is no longer probable of occurring ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component ​ $ 153 ​ ​ ​ ​ $ 149 ​ ​ (20) Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component ​ $ (16) ​ ​ ​ ​ $ (16) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) Recognized in ​ ​ ​ Income on Fair Value and Cash Flow Hedging ​ ​ ​ Relationships ​ ​ ​ For the nine months ended September 30, ​ ​ ​ 2021 ​ ​ 2021 ​ ​ 2020 ​ ​ 2020 ​ 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 ​ $ 405 ​ $ (48) ​ $ 279 ​ $ 53 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 405 ​ $ (23) ​ $ 279 ​ $ 53 Amount of gain or (loss) reclassified from accumulated other comprehensive income into income as a result that a forecasted transaction is no longer probable of occurring ​ ​ ​ ​ $ (25) ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component ​ $ 453 ​ $ (48) ​ $ 327 ​ $ 53 Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component ​ $ (48) ​ ​ ​ ​ $ (48) ​ $ ​ ​ ​ ​ ​ ​ ​ ​ Effect of Derivative Instruments on the Consolidated Statements of Income and Comprehensive Income The tables below present the effect of the Company’s derivative financial instruments on the Consolidated Statements of Income and Comprehensive Income for the three and nine months ended September 30, 2021 and 2020. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of Gain ​ Amount of Loss Amount of Gain ​ Amount of Loss ​ ​ ​ ​ Recognized in ​ Recognized in Recognized in ​ Recognized in ​ ​ Location of Gain or (Loss) ​ Income ​ Income Income ​ Income ​ ​ Recognized in Income on ​ Three Months Ended ​ Nine Months Ended Three Months Ended ​ Nine Months Ended Derivatives Not Designated as Hedging Instruments Derivative September 30, 2021 September 30, 2021 September 30, 2020 September 30, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Swaps Interest rate swap revenue ​ $ 7 ​ $ 175 ​ $ 97 ​ $ (44) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fee Income ​ Fee income ​ $ 72 ​ $ 569 ​ $ 1,131 ​ $ 1,991 ​ Offsetting Derivatives The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s derivatives as of September 30, 2021 and December 31, 2020. 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 September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 10,690 ​ $ ​ ​ $ 10,690 ​ $ 3,029 ​ ​ ​ ​ $ 7,661 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Paid ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 9,277 ​ $ ​ ​ $ 9,277 ​ $ 3,029 ​ ​ — ​ $ 6,248 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 1,678 ​ ​ ​ ​ $ 13,693 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Paid ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 14,099 ​ $ ​ ​ $ 14,099 ​ $ 1,678 ​ ​ 12,421 ​ $ ​ ​ 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 September 30, 2021, the termination value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $6,248. As of December 31, 2020, the termination value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $12,421. The Company has minimum collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $7,380 against its obligations under these agreements as of September 30, 2021, compared to having posted collateral of $15,360 with counterparties at December 31, 2020. Cash collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the agreement. The cash collateral is exchanged under bilateral collateral and master netting agreements that allow us to offset the net derivative position with the related collateral. The application of the cash collateral cannot reduce the net derivative position below zero. Therefore, excess other collateral, if any, is not reflected above. 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.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2021
Deposits.
Deposits	​ 10. Deposits ​ The major components of interest-bearing and noninterest-bearing deposits at September 30, 2021 and December 31, 2020 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ At the period end September 30, 2021 December 31, 2020 Interest-bearing deposits: ​ ​ ​ ​ ​ ​ ​ Money market accounts ​ $ 571,679 ​ $ 496,634 ​ Now accounts ​ 780,033 ​ 567,087 ​ Savings accounts ​ 478,012 ​ 431,224 ​ Time deposits less than $250 ​ 208,691 ​ 221,446 ​ Time deposits $250 or more ​ 89,903 ​ 98,247 ​ Total interest-bearing deposits ​ 2,128,318 ​ 1,814,638 ​ Noninterest-bearing deposits ​ 712,601 ​ 622,475 ​ Total deposits ​ $ 2,840,919 ​ $ 2,437,113 ​ ​ The growth in deposits occurred in non-maturity deposits as demand for liquid accounts elevated due to low interest rates. Strong organic growth of core deposits from new and existing relationships across all our markets, inflows of public fund deposits, and federal government stimulus payments contributed to the increase. Time deposits less than $250 decreased due to $12.5 million of matured brokered deposits. Time deposits $250 or more decreased due to the maturity of a few large public fund certificates of deposit.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2021
Borrowings
Borrowings	11. Borrowings ​ Short-term borrowings consists of FHLB advances representing overnight borrowings or with stated original terms of less than twelve months and other borrowings related to collateral held from derivative counterparties. At September 30, 2021 there were no short-term borrowings outstanding, as excess liquidity was used to payoff borrowings. The table below outlines short-term borrowings at September 30, 2021 and December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the nine months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Weighted ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Average ​ Rate at ​ Balance Balance Balance Rate September 30,2021 FHLB advances ​ ​ ​ ​ ​ 18,682 ​ ​ 50,000 0.55 ​ ​ ​ Total short-term borrowings ​ $ ​ ​ $ 18,682 ​ $ 50,000 0.55 % ​ % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End ​ Balance Balance Balance the Year of the Year FHLB advances ​ $ 50,000 ​ $ 83,716 ​ $ 179,199 1.01 % 0.40 % ​ 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 September 30, 2021, the maximum borrowing capacity was $858,953 of which $3,235 was outstanding in borrowings and $352,935 was used to issue standby letters of credit to collateralize public fund deposits. 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. The overnight borrowing rate resets each day. Long-term debt consisting of advances from the FHLB at September 30, 2021 and December 31, 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ Due ​ Fixed ​ ​ ​ September 30, 2021 ​ ​ December 31, 2020 June 2021 ​ 1.99 ​ ​ ​ ​ ​ $ 10,000 ​ March 2023 ​ 4.69 ​ ​ $ 3,235 ​ ​ 4,769 ​ ​ ​ ​ ​ ​ $ 3,235 ​ $ 14,769 ​ ​ Maturities of long-term debt, by contractual maturity, for the remainder of 2021 and subsequent years are as follows: ​ ​ ​ ​ ​ ​ 2021 $ 524 ​ 2022 ​ 2,156 ​ 2023 ​ 555 ​ ​ ​ $ 3,235 ​ ​ The advances from the FHLB totaling $3,235 are not convertible.

Subordinated debt

Subordinated debt	9 Months Ended
	Sep. 30, 2021
Subordinated debt
Subordinated debt	12. 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 is 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 or the Bank. ​

Income taxes

Income taxes	9 Months Ended
	Sep. 30, 2021
Income taxes
Income taxes	13. Income taxes ​ The effective tax rate of the Company was 15.3% and 17.7% for the three and nine months ended September 30, 2021 compared to 15.5% and 14.2% for the three and nine months ended September 30, 2020. The nine months ended September 30, 2021 includes a $621 deferred tax adjustment related to prior periods and the Company’s frozen pension plan. Excluding this adjustment, the effective tax rate would be 15.8% for the nine month period ended September 30, 2021, an increase from the year ago period’s 14.2% due to a lower proportion of tax exempt income recognized in 2021 when compared to 2020. Before tax investment tax credits amounted to $276 and $819 for the three and nine months ended September 30, 2021 compared to before tax investment tax credits and other credits of $276 and $821 for those same periods last year.

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	9 Months Ended
	Sep. 30, 2021
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 (“the Bank”), collectively, the “Company” or “Peoples”. The Company services its retail and commercial customers through
Basis of presentation	Basis of presentation: ​ The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10-01 of Regulation S-X. In the opinion of management, all normal recurring adjustments necessary for a fair presentation of the consolidated financial position and results of operations for the periods presented have been included. All significant intercompany balances and transactions have been eliminated in consolidation. Prior-period amounts are reclassified when necessary to conform to the current year’s presentation. These reclassifications did not have any effect on the consolidated operating results or financial position of the Company. The consolidated operating results and financial position of the Company for the three and nine months ended and as of September 30, 2021, are not necessarily indicative of the results of consolidated operations and financial position that may be expected in the future. ​ 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, determination of other-than-temporary impairment losses on securities, and impairment of goodwill. Actual results could differ from those estimates. For additional information and disclosures required under GAAP, reference is made to the Company’s Annual Report on Form 10-K for the period ended December 31, 2020.
Fourth Quarter Dividend Declaration	Fourth Quarter Dividend Decl aration ​ On October 29, 2021, the Board of Directors declared a fourth quarter dividend of $0.38 per share. The dividend is payable December 15, 2021 to shareholders of record November 30, 2021. ​ Visa Class B Common Stock Sale ​ On October 8, 2021, Peoples’ banking subsidiary, Peoples Security Bank and Trust Company (the “Bank”), agreed to sell its 44,982 shares of the Class B common stock of Visa Inc. for a purchase price of $12.2 million. The shares had no carrying value on the Bank’s balance sheet and, as the Bank had no historical cost basis in the shares, the entire purchase price will be realized as a pretax gain. ​ The Bank received 73,333 Class B shares of Visa Inc. as part of its membership interest in March 2008, and 28,351 shares were redeemed in connection with Visa’s initial public offering in 2008. The sale of the remaining 44,982 Class B shares settled in October, 2021 and will be included in our 2021 fourth-quarter and year-end results as an after-tax gain of $9.6 million. The gain on the sale of the Class B shares is not indicative of the expected results of consolidated operations for those periods.
Visa Class B Common Stock Sale	On October 29, 2021, the Board of Directors declared a fourth quarter dividend of $0.38 per share. The dividend is payable December 15, 2021 to shareholders of record November 30, 2021.
Recent accounting standards	Recent accounting standards: ​ From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board ("FASB") or other standard setting bodies that are adopted by the Company as of the required effective dates. The following should be read in conjunction with "Note 1 Summary of significant accounting policies" of the Notes to the Consolidated Financial Statements included in the Company’s annual report on Form 10-K for the year ended December 31, 2020. Unless otherwise discussed, management believes the impact of any recently issued standards, including those issued but not yet effective, will not have a material impact on the Company’s consolidated financial statements. ​ In June 2016, the 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 significant 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. At the relevant time, the Company qualified as a smaller reporting company 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 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 Bank'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.

Other comprehensive income (l_2

Other comprehensive income (loss) (Tables)	9 Months Ended
	Sep. 30, 2021
Other comprehensive income (loss)
Schedule of components of accumulated other comprehensive income (loss)	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Net unrealized gain on investment securities available-for-sale ​ $ 1,287 ​ $ 9,696 ​ Income tax expense ​ 270 ​ 2,036 ​ Net of income taxes ​ 1,017 ​ 7,660 ​ Benefit plan adjustments ​ (7,977) ​ (7,977) ​ Income tax benefit ​ (1,675) ​ (1,675) ​ Net of income taxes ​ (6,302) ​ (6,302) ​ Derivative adjustments ​ 980 ​ 1,002 ​ Income tax ​ 206 ​ 211 ​ Net of income taxes ​ 774 ​ 791 ​ Accumulated other comprehensive income (loss) ​ $ (4,511) ​ $ 2,149 ​

Earnings per share (Tables)

Earnings per share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings per share
Schedule of earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ For the Three Months Ended September 30, Basic Diluted Basic Diluted Net income $ 9,096 $ 9,096 $ 8,312 $ 8,312 Average common shares outstanding ​ 7,198,125 ​ 7,233,189 ​ 7,277,189 ​ 7,312,253 ​ Earnings per share ​ $ 1.26 ​ $ 1.26 ​ $ 1.14 ​ $ 1.14 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ For the Nine Months Ended September 30, ​ Basic ​ Diluted ​ Basic ​ Diluted ​ Net income $ 27,105 $ 27,105 $ 21,169 ​ $ 21,169 Average common shares outstanding ​ 7,204,399 ​ 7,239,463 ​ 7,332,539 ​ 7,364,693 ​ Earnings per share ​ $ 3.76 ​ $ 3.74 ​ $ 2.89 ​ $ 2.87 ​

Investment securities (Tables)

Investment securities (Tables)	9 Months Ended
	Sep. 30, 2021
Investment Securities
Schedule of amortized cost and fair value of investment securities aggregated by investment category	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair September 30, 2021 Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 135,816 ​ $ 191 ​ $ 610 ​ $ 135,397 ​ U.S. government-sponsored enterprises ​ ​ 40,969 ​ ​ 621 ​ ​ ​ ​ ​ 41,590 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 66,535 ​ ​ 1,315 ​ ​ 949 ​ 66,901 ​ Tax-exempt ​ 89,124 ​ 2,389 ​ ​ 1,028 ​ 90,485 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 2,087 ​ 71 ​ ​ ​ ​ 2,158 ​ U.S. government-sponsored enterprises ​ 109,992 ​ 1,199 ​ 2,471 ​ 108,720 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 12,562 ​ 598 ​ ​ ​ 13,160 ​ Corporate debt securities ​ ​ 3,000 ​ ​ ​ ​ ​ 39 ​ ​ 2,961 ​ Total ​ $ 460,085 ​ $ 6,384 ​ $ 5,097 ​ $ 461,372 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 10,384 ​ $ 146 ​ $ 59 ​ $ 10,471 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 11,361 ​ ​ ​ ​ 195 ​ 11,166 ​ U.S. government-sponsored enterprises ​ 11,103 ​ 4 ​ ​ 188 ​ 10,919 ​ Total ​ $ 32,848 ​ $ 150 ​ $ 442 ​ $ 32,556 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​
Summary of unrealized and realized gains and losses	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended September 30, ​ 2021 ​ 2020 Net gain recognized during the period on equity securities ​ $ 5 ​ $ 2 Less: Net gain (loss) recognized during the period on equity securities sold during the period ​ ​ ​ ​ Unrealized gain recognized during the reporting period on equity securities still held at the reporting date ​ $ 5 ​ $ 2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Nine Months Ended September 30, ​ 2021 ​ 2020 Net gain (loss) recognized during the period on equity securities ​ $ 9 ​ $ (82) Less: Net gain (loss) recognized during the period on equity securities sold during the period ​ ​ ​ ​ Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date ​ $ 9 ​ $ (82)
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 September 30, 2021 Value Losses Value Losses Value Losses U.S. Treasury securities $ 102,789 $ 610 ​ ​ ​ ​ $ 102,789 $ 610 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ ​ 29,122 ​ ​ 771 ​ $ 4,283 ​ $ 178 ​ $ 33,405 ​ $ 949 ​ Tax-exempt ​ ​ 52,825 ​ ​ 1,087 ​ ​ ​ ​ ​ ​ ​ ​ 52,825 ​ ​ 1,087 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ 11,279 ​ ​ 195 ​ ​ ​ ​ ​ ​ ​ $ 11,279 ​ $ 195 ​ U.S. government-sponsored enterprises ​ ​ 89,214 ​ ​ 2,502 ​ ​ 7,069 ​ ​ 157 ​ ​ 96,283 ​ 2,659 ​ Corporate debt securities ​ ​ 2,961 ​ ​ 39 ​ ​ ​ ​ ​ ​ ​ ​ 2,961 ​ ​ 39 ​ Total ​ $ 288,190 ​ $ 5,204 ​ $ 11,352 ​ $ 335 ​ $ 299,542 ​ $ 5,539 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​
Available-for-Sale Securities.
Investment Securities
Schedule of maturity distribution of fair value	​ ​ ​ ​ ​ ​ ​ ​ Fair September 30, 2021 Value Within one year ​ $ 38,277 ​ After one but within five years ​ 95,877 ​ After five but within ten years ​ 93,524 ​ After ten years ​ 106,538 ​ ​ ​ 334,216 ​ Mortgage-backed and other amortizing securities ​ 127,156 ​ Total ​ $ 461,372 ​
Held-to-maturity Securities.
Investment Securities
Schedule of maturity distribution of fair value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair September 30, 2021 Cost Value After five but within ten years ​ $ 5,940 ​ $ 5,938 ​ After ten years ​ ​ 4,444 ​ ​ 4,533 ​ ​ ​ 10,384 ​ 10,471 ​ Mortgage-backed securities ​ 22,464 ​ 22,085 ​ Total ​ $ 32,848 ​ $ 32,556 ​

Loans, net and allowance for _2

Loans, net and allowance for loan losses (Tables)	9 Months Ended
	Sep. 30, 2021
Loans, net and allowance for loan losses
Schedule of major classifications of loans outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Commercial ​ $ 588,466 ​ $ 679,286 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,248,693 ​ 1,137,990 ​ Residential ​ 291,404 ​ 277,414 ​ Consumer ​ 77,098 ​ 83,292 ​ Total ​ $ 2,205,661 ​ $ 2,177,982 ​
Schedule of changes in allowance for loan losses account by major classification of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2021 Commercial Commercial Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance July 1, 2021 ​ $ 8,520 ​ $ 14,281 ​ $ 3,069 ​ $ 869 ​ $ 26,739 ​ Charge-offs ​ (446) ​ (12) ​ ​ ​ (8) ​ (466) ​ Recoveries ​ 4 ​ 1 ​ ​ ​ 15 ​ 20 ​ Provisions (credits) ​ (164) ​ 519 ​ 92 ​ (47) ​ 400 ​ Ending balance ​ $ 7,914 ​ $ 14,789 ​ $ 3,161 ​ $ 829 ​ $ 26,693 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2020 Commercial Commercial Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance July 1, 2020 ​ $ 8,487 ​ $ 13,855 ​ $ 3,567 ​ $ 1,048 ​ $ 26,957 ​ Charge-offs ​ (1,354) ​ (66) ​ (71) ​ (51) ​ (1,542) ​ Recoveries ​ 51 ​ 14 ​ 9 ​ 45 ​ 119 ​ Provisions (credits) ​ 1,271 ​ (5) ​ (159) ​ (57) ​ 1,050 ​ Ending balance ​ $ 8,455 $ 13,798 ​ $ 3,346 ​ $ 985 ​ $ 26,584 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2021 Commercial Commercial Residential ​ Consumer ​ Total ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance January 1, 2021 $ 8,734 ​ $ 14,559 ​ $ 3,129 ​ $ 922 ​ $ 27,344 ​ Charge-offs (461) ​ (252) ​ (24) ​ (114) ​ (851) ​ Recoveries 83 ​ 67 ​ 2 ​ 48 ​ 200 ​ Provisions (credits) (442) ​ 415 ​ 54 ​ (27) ​ ​ ​ Ending balance $ 7,914 $ 14,789 ​ $ 3,161 ​ $ 829 ​ $ 26,693 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ September 30, 2020 Commercial Commercial Residential ​ Consumer ​ Total ​ Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance January 1, 2020 ​ $ 6,888 ​ $ 11,496 ​ $ 3,226 ​ $ 1,067 ​ $ 22,677 ​ Charge-offs ​ (2,339) ​ (113) ​ (206) ​ (299) ​ (2,957) ​ Recoveries ​ 349 ​ 14 ​ 22 ​ 129 ​ 514 ​ Provisions ​ 3,557 ​ 2,401 ​ 304 ​ 88 ​ 6,350 ​ Ending balance ​ $ 8,455 ​ $ 13,798 ​ $ 3,346 ​ $ 985 ​ $ 26,584 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ September 30, 2021 Commercial Commercial Residential Consumer Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 7,914 ​ $ 14,789 $ 3,161 ​ $ 829 ​ $ 26,693 Ending balance: individually evaluated for impairment 18 ​ ​ 107 ​ ​ 41 ​ ​ ​ ​ 166 Ending balance: collectively evaluated for impairment $ 7,896 ​ $ 14,682 ​ $ 3,120 ​ $ 829 ​ $ 26,527 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 588,466 ​ $ 1,248,693 $ 291,404 ​ $ 77,098 ​ $ 2,205,661 Ending balance: individually evaluated for impairment ​ 1,058 ​ ​ 3,094 ​ ​ 1,431 ​ ​ 82 ​ 5,665 Ending balance: collectively evaluated for impairment ​ $ 587,408 ​ $ 1,245,599 ​ $ 289,973 ​ $ 77,016 ​ $ 2,199,996 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2020 Commercial Commercial Residential Consumer Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​
Schedule of major classification of loans portfolio summarized by credit quality	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 Pass Mention Substandard Doubtful Total Commercial ​ $ 584,020 ​ $ 2,889 ​ $ 1,557 ​ $ ​ ​ $ 588,466 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,229,908 ​ 13,013 ​ 5,772 ​ ​ ​ ​ 1,248,693 ​ Residential ​ 288,389 ​ 338 ​ 2,677 ​ ​ ​ ​ 291,404 ​ Consumer ​ 77,016 ​ ​ ​ 82 ​ ​ ​ ​ 77,098 ​ Total ​ $ 2,179,333 ​ $ 16,240 ​ $ 10,088 ​ $ ​ ​ $ 2,205,661 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​
Schedule of information concerning nonaccrual loans by major loan classification	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Commercial ​ $ 648 ​ $ 3,822 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,435 ​ 3,262 ​ Residential ​ 809 ​ 922 ​ Consumer ​ 82 ​ 111 ​ Total ​ $ 3,974 ​ $ 8,117 ​
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 September 30, 2021 ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 62 ​ $ 47 ​ $ 648 ​ $ 757 ​ $ 587,709 ​ $ 588,466 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 612 ​ ​ 311 ​ 2,465 ​ 3,388 ​ 1,245,305 ​ 1,248,693 ​ $ 30 ​ Residential ​ 317 ​ ​ 302 ​ ​ 857 ​ 1,476 ​ 289,928 ​ 291,404 ​ ​ 48 ​ Consumer ​ 450 ​ 78 ​ 82 ​ 610 ​ 76,488 ​ 77,098 ​ ​ ​ Total ​ $ 1,441 ​ $ 738 ​ $ 4,052 ​ $ 6,231 ​ $ 2,199,430 ​ $ 2,205,661 ​ $ 78 ​ ​ Improved credit quality resulted in lower levels of past due loans from year end. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​
Summarized information concerning impaired loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ This Quarter ​ Year-to-Date ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income Recorded ​ Income September 30, 2021 Investment Balance Allowance Investment Recognized Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 634 ​ $ 1,097 ​ ​ ​ ​ $ 870 ​ $ 2 ​ $ 1,166 ​ $ 9 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,560 ​ 3,275 ​ ​ ​ ​ 2,785 ​ 4 ​ 2,805 ​ 19 ​ Residential ​ 991 ​ 1,184 ​ ​ ​ ​ 999 ​ 5 ​ 1,051 ​ 15 ​ Consumer ​ 82 ​ 96 ​ ​ ​ ​ 79 ​ ​ ​ ​ 91 ​ ​ ​ ​ Total ​ 4,267 ​ 5,652 ​ ​ ​ ​ 4,733 ​ 11 ​ 5,113 ​ 43 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 424 ​ 424 ​ $ 18 ​ 695 ​ 5 ​ 1,354 ​ 15 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 534 ​ 564 ​ 107 ​ 604 ​ 4 ​ 875 ​ 14 ​ Residential ​ 440 ​ 446 ​ 41 ​ 450 ​ 3 ​ 445 ​ 10 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 1,398 ​ 1,434 ​ 166 ​ 1,749 ​ 12 ​ 2,674 ​ 39 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,058 ​ 1,521 ​ 18 ​ 1,565 ​ 7 ​ 2,520 ​ 24 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,094 ​ 3,839 ​ 107 ​ 3,389 ​ 8 ​ 3,680 ​ 33 ​ Residential ​ 1,431 ​ 1,630 ​ 41 ​ 1,449 ​ 8 ​ 1,496 ​ 25 ​ Consumer ​ 82 ​ 96 ​ ​ ​ 79 ​ ​ ​ 91 ​ ​ ​ Total ​ $ 5,665 ​ $ 7,086 ​ $ 166 ​ $ 6,482 ​ $ 23 ​ $ 7,787 ​ $ 82 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ This Quarter ​ Year-to-Date ​ ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income Recorded ​ Income September 30, 2020 Investment Balance Allowance Investment Recognized Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 2,060 ​ $ 3,032 ​ ​ ​ ​ $ 2,491 ​ $ 3 ​ $ 3,081 ​ $ 28 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,146 ​ 2,749 ​ ​ ​ ​ 2,094 ​ ​ 3 ​ 2,092 ​ ​ 25 ​ Residential ​ 1,068 ​ 1,219 ​ ​ ​ ​ 1,092 ​ ​ 5 ​ 1,258 ​ ​ 15 ​ Consumer ​ 103 ​ 119 ​ ​ ​ ​ 132 ​ ​ ​ ​ 181 ​ ​ ​ ​ Total ​ 5,377 ​ 7,119 ​ ​ ​ ​ 5,809 ​ ​ 11 ​ 6,612 ​ ​ 68 ​ With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,679 ​ 2,713 ​ $ 1,113 ​ 2,583 ​ ​ 6 ​ 2,036 ​ ​ 12 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,015 ​ 2,254 ​ 179 ​ 2,232 ​ 18 ​ 1,714 ​ 18 ​ Residential ​ 711 ​ 795 ​ 92 ​ 761 ​ 3 ​ 666 ​ 10 ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 5,405 ​ 5,762 ​ 1,384 ​ 5,576 ​ 27 ​ 4,416 ​ 40 ​ Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,739 ​ 5,745 ​ 1,113 ​ 5,074 ​ 9 ​ 5,117 ​ 40 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 4,161 ​ 5,003 ​ 179 ​ 4,326 ​ 21 ​ 3,806 ​ 43 ​ Residential ​ 1,779 ​ 2,014 ​ 92 ​ 1,853 ​ 8 ​ 1,924 ​ 25 ​ Consumer ​ 103 ​ 119 ​ ​ ​ ​ 132 ​ ​ ​ ​ 181 ​ ​ ​ ​ Total ​ $ 10,782 ​ $ 12,881 ​ $ 1,384 ​ $ 11,385 ​ $ 38 ​ $ 11,028 ​ $ 108 ​
Summary loans whose terms have been modified resulting in troubled debt restructurings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Three Months Ended September 30, 2020 ​ For the Nine Months Ended September 30, 2020 ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ ​ Pre-Modification ​ ​ Post-Modification ​ ​ Number ​ Recorded ​ Recorded ​ Number ​ ​ Recorded ​ ​ Recored ​ ​ of Loans Investment Investment of Loans ​ Investment ​ Investment Commercial real estate ​ ​ ​ $ ​ ​ $ ​ ​ 3 ​ $ 1,073 ​ $ 1,073 Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ 1 ​ ​ 12 ​ ​ 12 Total ​ ​ ​ $ ​ ​ $ ​ 4 ​ $ 1,085 ​ $ 1,085

Other assets (Tables)

Other assets (Tables)	9 Months Ended
	Sep. 30, 2021
Other assets
Schedule of components of other assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2021 ​ December 31, 2020 Other real estate owned ​ $ 610 ​ $ 864 ​ Investment in low income housing partnership ​ 5,972 ​ 6,332 ​ Mortgage servicing rights ​ 846 ​ 838 ​ Restricted equity securities (FHLB and other) ​ 3,916 ​ 5,397 ​ Net deferred tax asset ​ ​ 4,918 ​ ​ 3,768 ​ Interest rate floor ​ ​ 1,159 ​ ​ 1,678 ​ Interest rate swaps ​ ​ 9,531 ​ ​ 13,693 ​ Other assets ​ 6,004 ​ 6,345 ​ Total ​ $ 32,956 ​ $ 38,915 ​ ​ ​ ​ ​ ​ ​ ​ ​

Fair value estimates (Tables)

Fair value estimates (Tables)	9 Months Ended
	Sep. 30, 2021
Fair value estimates
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 September 30, 2021 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 135,397 $ 135,397 ​ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 41,590 ​ ​ ​ ​ $ 41,590 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 66,901 ​ ​ ​ ​ 66,901 ​ ​ ​ ​ Tax-exempt ​ 90,485 ​ ​ ​ ​ 90,485 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 2,158 ​ ​ ​ ​ 2,158 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 121,880 ​ ​ ​ ​ 121,880 ​ ​ ​ ​ Corporate debt securities ​ ​ 2,961 ​ ​ ​ ​ ​ 2,961 ​ ​ ​ ​ Common equity securities ​ ​ 147 ​ ​ 147 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 461,519 ​ $ 135,544 ​ $ 325,975 ​ $ ​ ​ Loan held for sale ​ $ 997 ​ ​ ​ ​ $ 997 ​ ​ ​ ​ Interest rate floor-other assets ​ $ 1,159 ​ ​ ​ ​ $ 1,159 ​ ​ ​ ​ Interest rate swap-other assets ​ $ 9,531 ​ ​ ​ ​ $ 9,531 ​ ​ ​ ​ Interest rate swap-other liabilities ​ $ (9,277) ​ ​ ​ ​ $ (9,277) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 296,049 ​ $ 19,043 ​ $ 277,006 ​ $ ​ ​ 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) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
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 September 30, 2021 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 1,232 ​ ​ ​ ​ $ 1,232 ​ Other real estate owned ​ $ 487 ​ ​ ​ ​ ​ ​ ​ $ 487 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant Other ​ Significant ​ ​ ​ ​ Active Markets for ​ 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 ​
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 September 30, 2021 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 1,232 Appraisal of collateral Appraisal adjustments 21.6% to 97.0% (87.0)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.3)% ​ Other real estate owned ​ $ 487 Appraisal of collateral Appraisal adjustments 35.9% to 35.9% (35.9)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.0)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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)% ​ ​
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 September 30, 2021 Value Value (level 1) (level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 360,587 ​ $ 360,587 ​ $ 360,587 ​ ​ ​ ​ ​ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 461,372 ​ 461,372 ​ ​ 135,397 ​ $ 325,975 ​ ​ ​ ​ Common equity securities ​ ​ 147 ​ ​ 147 ​ ​ 147 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 32,848 ​ 32,556 ​ ​ ​ ​ 32,556 ​ ​ ​ ​ Loans held for sale ​ 997 ​ 997 ​ ​ ​ ​ 997 ​ ​ ​ ​ Net loans ​ 2,178,968 ​ 2,154,145 ​ ​ ​ ​ ​ ​ ​ $ 2,154,145 ​ Accrued interest receivable ​ 8,280 ​ 8,280 ​ ​ ​ ​ 8,280 ​ ​ ​ ​ Mortgage servicing rights ​ 846 ​ 1,282 ​ ​ ​ ​ 1,282 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ ​ 3,916 ​ 3,916 ​ ​ ​ ​ 3,916 ​ ​ ​ ​ Interest rate floor ​ ​ 1,159 ​ ​ 1,159 ​ ​ ​ ​ ​ 1,159 ​ ​ ​ ​ Interest rate swaps ​ 9,531 ​ 9,531 ​ ​ ​ ​ 9,531 ​ ​ ​ ​ Total ​ $ 3,058,651 ​ $ 3,033,972 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 2,840,919 ​ $ 2,842,487 ​ ​ ​ ​ $ 2,842,487 ​ ​ ​ ​ Long-term debt ​ 3,235 ​ 3,336 ​ ​ ​ ​ 3,336 ​ ​ ​ ​ Subordinated debentures ​ 33,000 ​ 32,660 ​ ​ ​ ​ 32,660 ​ ​ ​ ​ Accrued interest payable ​ ​ 872 ​ 872 ​ ​ ​ ​ ​ 872 ​ ​ ​ ​ Interest rate swaps ​ 9,277 ​ 9,277 ​ ​ ​ ​ ​ 9,277 ​ ​ ​ ​ Total ​ $ 2,887,303 ​ $ 2,888,632 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Employee benefit plans (Tables)

Employee benefit plans (Tables)	9 Months Ended
	Sep. 30, 2021
Employee benefit plans
Schedule of components of net periodic benefit cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Three Months Ended September 30, 2021 2020 Components of net periodic pension benefit: ​ ​ ​ ​ Interest cost ​ $ 105 ​ $ 164 Expected return on plan assets ​ (322) ​ (371) Amortization of unrecognized net gain ​ 76 ​ 65 Net periodic benefit ​ $ (141) ​ $ (142) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits Nine Months Ended September 30, 2021 2020 Components of net periodic pension benefit: ​ ​ ​ ​ Interest cost ​ $ 315 ​ $ 381 Expected return on plan assets ​ (966) ​ (865) Amortization of unrecognized net gain ​ 227 ​ 152 Net periodic benefit ​ $ (424) ​ $ (332)

Derivatives and hedging activ_2

Derivatives and hedging activities (Tables)	9 Months Ended
	Sep. 30, 2021
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 September 30, 2021 (1) ​ As of December 31, 2020 ​ As of September 30, 2021 (1) ​ As of December 31, 2020 ​ 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 ​ $ 1,159 ​ Other Assets ​ $ 1,678 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap $ 50,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other Liabilities ​ $ ​ ​ Other Liabilities ​ $ 485 Total derivatives designated as hedging instruments ​ ​ ​ ​ ​ $ 1,159 ​ ​ ​ $ 1,678 ​ ​ ​ $ ​ ​ ​ ​ $ 485 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not ​ ​ ​ ​ ​ ​ Interest Rate Swaps (2) $ 396,154 ​ Other Assets $ 9,531 Other Assets $ 13,693 Other Liabilities $ 9,277 Other Liabilities ​ $ 13,614 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total derivatives not ​ ​ ​ $ 9,531 ​ $ 13,693 ​ $ 9,277 ​ $ 13,614 (1) Amounts include accrued interest . (2) Notional amount of interes t rate swaps at December 31, 2020 was $375,341 .
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 ​ ​ ​ ​ ​ September 30, 2021 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ September 30, 2021 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap ​ $ 401 ​ $ 401 ​ ​ ​ ​ Interest Expense ​ $ (23) ​ $ (23) ​ ​ ​ Cash Flow Swap ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other expense ​ ​ (25) ​ ​ (25) ​ ​ ​ Interest Rate Floor (*) ​ $ (66) ​ $ (70) ​ $ 4 ​ Interest Income ​ $ 405 ​ $ 453 ​ $ (48) Total ​ $ 335 ​ $ 331 ​ $ 4 ​ ​ ​ $ 357 ​ $ 405 ​ $ (48) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ ​ Income ​ ​ ​ ​ ​ September 30, 2020 ​ ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash Flow Swap ​ $ (592) ​ $ (592) ​ ​ ​ ​ Interest Expense ​ $ 53 ​ $ 53 ​ ​ ​ Interest Rate Floor (*) ​ $ 124 ​ $ 146 ​ $ (22) ​ Interest Income ​ $ 279 ​ $ 327 ​ $ (48) Total ​ $ (468) ​ $ (446) ​ $ (22) ​ ​ ​ $ 332 ​ $ 380 ​ $ (48) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ * 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 ​ ​ ​ For the three months ended September 30, ​ ​ ​ 2021 ​ ​ 2021 ​ ​ 2020 ​ ​ 2020 ​ 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 ​ $ 137 ​ ​ ​ ​ $ 133 ​ ​ (20) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 137 ​ ​ ​ ​ $ 133 ​ ​ (20) Amount of gain or (loss) reclassified from accumulated other comprehensive income into income as a result that a forecasted transaction is no longer probable of occurring ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component ​ $ 153 ​ ​ ​ ​ $ 149 ​ ​ (20) Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component ​ $ (16) ​ ​ ​ ​ $ (16) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) Recognized in ​ ​ ​ Income on Fair Value and Cash Flow Hedging ​ ​ ​ Relationships ​ ​ ​ For the nine months ended September 30, ​ ​ ​ 2021 ​ ​ 2021 ​ ​ 2020 ​ ​ 2020 ​ 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 ​ $ 405 ​ $ (48) ​ $ 279 ​ $ 53 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 405 ​ $ (23) ​ $ 279 ​ $ 53 Amount of gain or (loss) reclassified from accumulated other comprehensive income into income as a result that a forecasted transaction is no longer probable of occurring ​ ​ ​ ​ $ (25) ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component ​ $ 453 ​ $ (48) ​ $ 327 ​ $ 53 Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component ​ $ (48) ​ ​ ​ ​ $ (48) ​ $ ​
Schedule of gain (loss) on derivative instruments not designated as hedging instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of Gain ​ Amount of Loss Amount of Gain ​ Amount of Loss ​ ​ ​ ​ Recognized in ​ Recognized in Recognized in ​ Recognized in ​ ​ Location of Gain or (Loss) ​ Income ​ Income Income ​ Income ​ ​ Recognized in Income on ​ Three Months Ended ​ Nine Months Ended Three Months Ended ​ Nine Months Ended Derivatives Not Designated as Hedging Instruments Derivative September 30, 2021 September 30, 2021 September 30, 2020 September 30, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Swaps Interest rate swap revenue ​ $ 7 ​ $ 175 ​ $ 97 ​ $ (44) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fee Income ​ Fee income ​ $ 72 ​ $ 569 ​ $ 1,131 ​ $ 1,991
Schedule of offsetting derivatives	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 10,690 ​ $ ​ ​ $ 10,690 ​ $ 3,029 ​ ​ ​ ​ $ 7,661 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Paid ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 9,277 ​ $ ​ ​ $ 9,277 ​ $ 3,029 ​ ​ — ​ $ 6,248 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ $ 1,678 ​ ​ ​ ​ $ 13,693 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Paid ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 14,099 ​ $ ​ ​ $ 14,099 ​ $ 1,678 ​ ​ 12,421 ​ $ ​

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2021
Deposits.
Summary of major components of interest-bearing and noninterest-bearing deposits	​ ​ ​ ​ ​ ​ ​ ​ ​ At the period end September 30, 2021 December 31, 2020 Interest-bearing deposits: ​ ​ ​ ​ ​ ​ ​ Money market accounts ​ $ 571,679 ​ $ 496,634 ​ Now accounts ​ 780,033 ​ 567,087 ​ Savings accounts ​ 478,012 ​ 431,224 ​ Time deposits less than $250 ​ 208,691 ​ 221,446 ​ Time deposits $250 or more ​ 89,903 ​ 98,247 ​ Total interest-bearing deposits ​ 2,128,318 ​ 1,814,638 ​ Noninterest-bearing deposits ​ 712,601 ​ 622,475 ​ Total deposits ​ $ 2,840,919 ​ $ 2,437,113 ​

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2021
Borrowings
Summary of short-term borrowings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the nine months ended September 30, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Weighted ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Average ​ Rate at ​ Balance Balance Balance Rate September 30,2021 FHLB advances ​ ​ ​ ​ ​ 18,682 ​ ​ 50,000 0.55 ​ ​ ​ Total short-term borrowings ​ $ ​ ​ $ 18,682 ​ $ 50,000 0.55 % ​ % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End ​ Balance Balance Balance the Year of the Year FHLB advances ​ $ 50,000 ​ $ 83,716 ​ $ 179,199 1.01 % 0.40 %
Schedule of long-term debt consisting of advances	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ Due ​ Fixed ​ ​ ​ September 30, 2021 ​ ​ December 31, 2020 June 2021 ​ 1.99 ​ ​ ​ ​ ​ $ 10,000 ​ March 2023 ​ 4.69 ​ ​ $ 3,235 ​ ​ 4,769 ​ ​ ​ ​ ​ ​ $ 3,235 ​ $ 14,769 ​
Schedule of maturities of long-term debt	​ ​ ​ ​ ​ ​ 2021 $ 524 ​ 2022 ​ 2,156 ​ 2023 ​ 555 ​ ​ ​ $ 3,235 ​

Summary of significant accoun_3

Summary of significant accounting policies - Nature of operations and Basis of presentation (Details)	9 Months Ended
	Sep. 30, 2021Office
Summary of significant accounting policies
Number of full-service community banking offices	28

Summary of significant accoun_4

Summary of significant accounting policies - Significant events (Details)	Oct. 29, 2021$ / shares	Sep. 30, 2021USD ($)loan$ / shares	Jun. 30, 2021$ / shares	Mar. 31, 2021$ / shares	Sep. 30, 2020USD ($)$ / shares	Jun. 30, 2020$ / shares	Mar. 31, 2020$ / shares	Sep. 30, 2021USD ($)loan$ / shares	Sep. 30, 2020USD ($)$ / shares	Dec. 31, 2020USD ($)loan
Interest and Fee Income, Loans and Leases, Total		$ 21,276,000			$ 20,901,000			$ 62,205,000	$ 62,978,000
Loans		$ 2,205,661,000						$ 2,205,661,000		$ 2,177,982,000
Dividends declared | $ / shares	$ 0.38	$ 0.38	$ 0.37	$ 0.37	$ 0.36	$ 0.36	$ 0.36	$ 1.12	$ 1.08
Period for net fees recognized into income								6 months
PPP
Loans		$ 83,521,000						$ 83,521,000		$ 189,699,000
Remaining unamortized fees		$ 2,300,000						$ 2,300,000
PPP | SBA PPP
Number of loans originated | loan		1,062						1,062		1,450
Principal amount of loan originated		$ 121,600,000						$ 121,600,000		$ 217,500,000
Average loan size										150,000
Net fees on loans										5,200,000
Fees income								4,300,000
Amount of loan forgiven		227,800,000						227,800,000		27,800,000
Interest and Fee Income, Loans and Leases, Total								4,900,000		$ 2,300,000
PPP | Minimum | SBA PPP
Amortization period										24 months
PPP | Maximum | SBA PPP
Amortization period										60 months
PPP Two
Loans		$ 69,284,000						$ 69,284,000
Commercial loans | SBA PPP
Number of business loans with payment deferrals granted | loan										479
Loan receivable balances where payment deferrals were granted										$ 306,800,000
Consumer Loan | SBA PPP
Number of business loans with payment deferrals granted | loan										512
Loan receivable balances where payment deferrals were granted										$ 23,300,000

Summary of significant accoun_5

Summary of significant accounting policies - Visa Class B Common Stock Sale (Details) - USD ($)	Oct. 08, 2021	Oct. 31, 2021	Mar. 31, 2008	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2008
Gain on sale of investments					$ 724,000
Visa Class B stock
Number of shares sold	44,982	44,982
Purchase price	$ 12,200,000
Carrying value	$ 0
Number of shares purchased			73,333
Number of shares redeemed						28,351
Gain on sale of investments				$ 9,600,000

Other comprehensive income (l_3

Other comprehensive income (loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Other comprehensive income (loss)
Net unrealized gain on investment securities available-for-sale	$ 1,287	$ 9,696
Income tax expense	270	2,036
Net of income taxes	1,017	7,660
Benefit plan adjustments	(7,977)	(7,977)
Income tax benefit	1,675	1,675
Net of income taxes	(6,302)	(6,302)
Derivative adjustments	980	1,002
Income tax	206	211
Net of income taxes	774	791
Accumulated other comprehensive income (loss)	$ (4,511)	$ 2,149

Earnings per share - Schedule o

Earnings per share - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings per share
Net income, Basic	$ 9,096	$ 8,312	$ 27,105	$ 21,169
Average common shares outstanding - basic	7,198,125	7,277,189	7,204,399	7,332,539
Net income - basic	$ 1.26	$ 1.14	$ 3.76	$ 2.89
Net income, Diluted	$ 9,096	$ 8,312	$ 27,105	$ 21,169
Average common shares outstanding - diluted	7,233,189	7,312,253	7,239,463	7,364,693
Net income - diluted	$ 1.26	$ 1.14	$ 3.74	$ 2.87

Investment securities - Amortiz

Investment securities - Amortized Cost and Fair Value of Investment Securities Aggregated by Investment Category (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment Securities
Available-for-sale, Amortized Cost	$ 460,085	$ 286,215
Available-for-sale, Gross Unrealized Gains	6,384	9,899
Available-for-sale, Gross Unrealized Losses	5,097	203
Available-for-sale, Fair Value	461,372	295,911
Held-to-maturity, Amortized Cost	32,848	7,225
Held-to-maturity, Gross Unrealized Gains	150	288
Held-to-maturity, Gross Unrealized Losses	442
Held-to-maturity, Fair value	32,556	7,513
U.S. Treasuries
Investment Securities
Available-for-sale, Amortized Cost	135,816	18,478
Available-for-sale, Gross Unrealized Gains	191	427
Available-for-sale, Gross Unrealized Losses	610
Available-for-sale, Fair Value	135,397	18,905
U.S. government-sponsored enterprises state and municipals
Investment Securities
Available-for-sale, Amortized Cost	40,969	63,834
Available-for-sale, Gross Unrealized Gains	621	1,354
Available-for-sale, Fair Value	41,590	65,188
Mortgage-backed Securities, U.S. government agencies
Investment Securities
Available-for-sale, Amortized Cost	2,087	3,553
Available-for-sale, Gross Unrealized Gains	71	154
Available-for-sale, Fair Value	2,158	3,707
Held-to-maturity, Amortized Cost	11,361	21
Held-to-maturity, Gross Unrealized Losses	195
Held-to-maturity, Fair value	11,166	21
Mortgage-backed Securities, U.S. government-sponsored enterprises
Investment Securities
Available-for-sale, Amortized Cost	109,992	79,457
Available-for-sale, Gross Unrealized Gains	1,199	1,930
Available-for-sale, Gross Unrealized Losses	2,471	136
Available-for-sale, Fair Value	108,720	81,251
Held-to-maturity, Amortized Cost	11,103	355
Held-to-maturity, Gross Unrealized Gains	4	13
Held-to-maturity, Gross Unrealized Losses	188
Held-to-maturity, Fair value	10,919	368
Commercial mortgage-backed Securities, U.S. government-sponsored enterprises
Investment Securities
Available-for-sale, Amortized Cost	12,562	12,619
Available-for-sale, Gross Unrealized Gains	598	881
Available-for-sale, Fair Value	13,160	13,500
Corporate debt securities
Investment Securities
Available-for-sale, Amortized Cost	3,000	1,000
Available-for-sale, Gross Unrealized Losses	39
Available-for-sale, Fair Value	2,961	1,000
State and Municipals, Taxable
Investment Securities
Available-for-sale, Amortized Cost	66,535	53,297
Available-for-sale, Gross Unrealized Gains	1,315	2,099
Available-for-sale, Gross Unrealized Losses	949	30
Available-for-sale, Fair Value	66,901	55,366
State and Municipals, Tax-exempt
Investment Securities
Available-for-sale, Amortized Cost	89,124	53,977
Available-for-sale, Gross Unrealized Gains	2,389	3,054
Available-for-sale, Gross Unrealized Losses	1,028	37
Available-for-sale, Fair Value	90,485	56,994
Held-to-maturity, Amortized Cost	10,384	6,849
Held-to-maturity, Gross Unrealized Gains	146	275
Held-to-maturity, Gross Unrealized Losses	59
Held-to-maturity, Fair value	$ 10,471	$ 7,124

Investment securities - Equity

Investment securities - Equity Securities Portfolio (Details) $ in Thousands	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)
Investment Securities
Number of equity securities portfolio consisting of stock of other financial institutions | security	1
Equity investments carried at fair value	$ 147	$ 138
Fair value of equity portfolio in excess of cost basis	6
Common equity securities.
Investment Securities
Equity investments carried at fair value	$ 147	$ 138

Investment securities - Unreali

Investment securities - Unrealized and realized gains and losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investment securities
Net gain (loss) recognized during the period on equity securities	$ 5	$ 2	$ 9	$ (82)
Unrealized gain (loss) recognized during the reporting period on equity securities still held at the reporting date	$ 5	$ 2	$ 9	$ (82)

Investment securities - Maturit

Investment securities - Maturity Distribution of Debt Securities Classified as Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities
Within one year	$ 38,277
After one but within five years	95,877
After five but within ten years	93,524
After ten years	106,538
Available for sale securities	334,216
Mortgage-backed and other amortizing securities	127,156
Total	$ 461,372	$ 295,911

Investment securities - Summary

Investment securities - Summary of Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost of Held-to-maturity Securities
Amortized Cost, After five but within ten years, Held to maturity	$ 5,940
Amortized Cost, After ten years, Held to maturity	4,444
Amortized Cost, Held to maturity	10,384
Amortized Cost, Mortgage-backed securities, Held to maturity	22,464
Held-to-maturity, Amortized Cost	32,848	$ 7,225
Fair Value of Held-to-maturity Securities
Fair Value, After five but within ten years, Held to maturity	5,938
Fair Value, After ten years, Held to maturity	4,533
Fair Value, Held to maturity	10,471
Fair Value, Mortgage-backed securities, Held to maturity	22,085
Held to maturity, Fair Value	$ 32,556	$ 7,513

Investment securities - Pledged

Investment securities - Pledged Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
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	$ 195,104	$ 165,982

Investment securities - Fair Va

Investment securities - Fair Value and Unrealized Losses of Investment Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	$ 288,190	$ 27,585
12 Months or More, Fair Value	11,352	284
Less Than 12 Months, Unrealized Losses	5,204	202
12 Months or More, Unrealized Losses	335	1
Total, Fair Value	299,542	27,869
Total, Unrealized Losses	5,539	203
State and Municipals, Taxable
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	29,122	9,246
12 Months or More, Fair Value	4,283
Less Than 12 Months, Unrealized Losses	771	30
12 Months or More, Unrealized Losses	178
Total, Fair Value	33,405	9,246
Total, Unrealized Losses	949	30
State and Municipals, Tax-exempt
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	52,825	6,786
Less Than 12 Months, Unrealized Losses	1,087	37
Total, Fair Value	52,825	6,786
Total, Unrealized Losses	1,087	37
U.S. Treasuries
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	102,789
Less Than 12 Months, Unrealized Losses	610
Total, Fair Value	102,789
Total, Unrealized Losses	610
Mortgage-backed Securities, U.S. government agencies
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	11,279
Less Than 12 Months, Unrealized Losses	195
Total, Fair Value	11,279
Total, Unrealized Losses	195
Mortgage-backed Securities, U.S. government-sponsored enterprises
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	89,214	11,553
12 Months or More, Fair Value	7,069	284
Less Than 12 Months, Unrealized Losses	2,502	135
12 Months or More, Unrealized Losses	157	1
Total, Fair Value	96,283	11,837
Total, Unrealized Losses	2,659	$ 136
Corporate debt securities
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Fair Value	2,961
Less Than 12 Months, Unrealized Losses	39
Total, Fair Value	2,961
Total, Unrealized Losses	$ 39

Investment securities - Additio

Investment securities - Additional Information (Details)	Oct. 08, 2021USD ($)shares	Oct. 31, 2021shares	Mar. 31, 2008shares	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)security	Sep. 30, 2020USD ($)	Dec. 31, 2008shares	Dec. 31, 2020USD ($)
Other-than-temporary impairments recognized						$ 0
Value of common stock				$ 14,356,000		14,356,000			$ 14,431,000
Gain on sale of investments							$ 724,000
Visa Class B stock
Value of common stock				0		0			0
Number of shares sold | shares	44,982	44,982
Purchase price	$ 12,200,000
Carrying value	$ 0
Number of shares purchased | shares			73,333
Number of shares redeemed | shares								28,351
Gain on sale of investments						9,600,000
Federal Home Loan Bank of Pittsburgh (FHLB)
Value of common stock				3,874,000		3,874,000			5,355,000
Atlantic Community Bankers Bank (ACBB)
Value of common stock				42,000		42,000			$ 42,000
U.S. government-sponsored enterprises state and municipals
Other-than-temporary impairments recognized				$ 0	$ 0	$ 0	$ 0
Mortgage-backed Securities, U.S. government-sponsored enterprises
Number of securities in continuous unrealized loss position | security						20
Number of securities in continuous unrealized loss positions 12 months or longer | security						4
Corporate Bonds
Number of securities in continuous unrealized loss position | security						5
State and Municipals, Taxable
Number of securities in continuous unrealized loss position | security						33
Number of securities in continuous unrealized loss positions 12 months or longer | security						4
State and Municipals, Tax-exempt
Number of securities in continuous unrealized loss position | security						65

Loans, net and allowance for _3

Loans, net and allowance for loan losses - Net Deferred Loan Costs (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Net deferred loan costs	$ 1,785	$ 2,058
Loans	2,205,661	2,177,982
PPP
Net deferred loan costs	2,283	2,921
Loans	83,521	$ 189,699
PPP Two
Loans	69,284
PPP One
Loans	$ 14,237

Loans, net and allowance for _4

Loans, net and allowance for loan losses - Major Classifications of Loans Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable
Loans	$ 2,205,661	$ 2,177,982
Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	588,466	679,286
Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,248,693	1,137,990
Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	291,404	277,414
Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	$ 77,098	$ 83,292

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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Allowance for loan losses:
Beginning Balance	$ 26,739	$ 26,957	$ 27,344	$ 22,677
Charge-offs	(466)	(1,542)	(851)	(2,957)
Recoveries	20	119	200	514
Provisions (credits)	400	1,050		6,350
Ending balance	26,693	26,584	26,693	26,584
Increase (decrease) in charge offs due to a partial write down of a non-accrual commercial relationship			1,500
Commercial
Allowance for loan losses:
Beginning Balance	8,520	8,487	8,734	6,888
Charge-offs	(446)	(1,354)	(461)	(2,339)
Recoveries	4	51	83	349
Provisions (credits)	(164)	1,271	(442)	3,557
Ending balance	7,914	8,455	7,914	8,455
Real estate Commercial
Allowance for loan losses:
Beginning Balance	14,281	13,855	14,559	11,496
Charge-offs	(12)	(66)	(252)	(113)
Recoveries	1	14	67	14
Provisions (credits)	519	(5)	415	2,401
Ending balance	14,789	13,798	14,789	13,798
Real estate Residential
Allowance for loan losses:
Beginning Balance	3,069	3,567	3,129	3,226
Charge-offs		(71)	(24)	(206)
Recoveries		9	2	22
Provisions (credits)	92	(159)	54	304
Ending balance	3,161	3,346	3,161	3,346
Consumer
Allowance for loan losses:
Beginning Balance	869	1,048	922	1,067
Charge-offs	(8)	(51)	(114)	(299)
Recoveries	15	45	48	129
Provisions (credits)	(47)	(57)	(27)	88
Ending balance	$ 829	$ 985	$ 829	$ 985

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	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Allowance for loan losses:
Ending balance	$ 26,693	$ 26,739	$ 27,344	$ 26,584	$ 26,957	$ 22,677
Ending balance: individually evaluated for impairment	166		1,202
Ending balance: collectively evaluated for impairment	26,527		26,142
Loans receivable:
Ending balance	2,205,661		2,177,982
Ending balance: individually evaluated for impairment	5,665		9,906
Ending balance: collectively evaluated for impairment	2,199,996		2,168,076
Commercial
Allowance for loan losses:
Ending balance	7,914	8,520	8,734	8,455	8,487	6,888
Ending balance: individually evaluated for impairment	18		947
Ending balance: collectively evaluated for impairment	7,896		7,787
Loans receivable:
Ending balance	588,466		679,286
Ending balance: individually evaluated for impairment	1,058		4,297
Ending balance: collectively evaluated for impairment	587,408		674,989
Real estate Commercial
Allowance for loan losses:
Ending balance	14,789	14,281	14,559	13,798	13,855	11,496
Ending balance: individually evaluated for impairment	107		180
Ending balance: collectively evaluated for impairment	14,682		14,379
Loans receivable:
Ending balance	1,248,693		1,137,990
Ending balance: individually evaluated for impairment	3,094		3,952
Ending balance: collectively evaluated for impairment	1,245,599		1,134,038
Real estate Residential
Allowance for loan losses:
Ending balance	3,161	3,069	3,129	3,346	3,567	3,226
Ending balance: individually evaluated for impairment	41		75
Ending balance: collectively evaluated for impairment	3,120		3,054
Loans receivable:
Ending balance	291,404		277,414
Ending balance: individually evaluated for impairment	1,431		1,546
Ending balance: collectively evaluated for impairment	289,973		275,868
Consumer
Allowance for loan losses:
Ending balance	829	$ 869	922	$ 985	$ 1,048	$ 1,067
Ending balance: collectively evaluated for impairment	829		922
Loans receivable:
Ending balance	77,098		83,292
Ending balance: individually evaluated for impairment	82		111
Ending balance: collectively evaluated for impairment	$ 77,016		$ 83,181

Loans, net and allowance for _7

Loans, net and allowance for loan losses - Major Classification of Loans Portfolio Summarized by Credit Quality (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)item	Dec. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable
Loans	$ 2,205,661	$ 2,177,982
Increase (decrease) in charge offs due to a partial write down of a non-accrual commercial relationship	1,500
Increase (decrease) in charge offs due to a partial write down of a non-accrual commercial relationship one	$ 1,000
Number of unrelated commercial relationships | item	2
Increase (decrease) in non accrual loans due to charge off of small business line of credit	$ 500
Increase (decrease) in charge offs due to commercial real estate loan transferred to other real estate owned	500
Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	588,466	679,286
Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,248,693	1,137,990
Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	291,404	277,414
Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	77,098	83,292
Pass
Accounts, Notes, Loans and Financing Receivable
Loans	2,179,333	2,125,800
Pass | Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	584,020	660,559
Pass | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,229,908	1,107,699
Pass | Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	288,389	274,327
Pass | Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	77,016	83,215
Special Mention
Accounts, Notes, Loans and Financing Receivable
Loans	16,240	31,966
Special Mention | Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	2,889	14,305
Increase (decrease) in loans and leases receivable	12,900
Special Mention | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	13,013	17,517
Decrease in loan due to upgrading credit line	5,300
Special Mention | Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	338	144
Substandard
Accounts, Notes, Loans and Financing Receivable
Loans	10,088	20,216
Substandard | Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	1,557	4,422
Increase (decrease) in loans and leases receivable	1,500
Substandard | Real estate Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	$ 5,772	12,774
Security provided by SBA	75.00%
Substandard | Real estate Residential
Accounts, Notes, Loans and Financing Receivable
Loans	$ 2,677	2,943
Substandard | Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	$ 82	$ 77

Loans, net and allowance for _8

Loans, net and allowance for loan losses - Information Concerning Nonaccrual Loans by Major Loan Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	$ 3,974	$ 8,117
Commercial
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	648	3,822
Real estate Commercial
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	2,435	3,262
Real estate Residential
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	809	922
Consumer
Financing Receivable, Recorded Investment, Past Due
Nonaccrual loans, Total	$ 82	$ 111

Loans, net and allowance for _9

Loans, net and allowance for loan losses - Major Classification of Loans by Past Due Status (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment, Past Due
Total Past Due	$ 6,231	$ 11,728
Current	2,199,430	2,166,254
Total Loans	2,205,661	2,177,982
Loans > 90 Days and Accruing	78	71
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	1,441	2,863
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	738	677
Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due	4,052	8,188
Commercial
Financing Receivable, Recorded Investment, Past Due
Total Past Due	757	3,895
Current	587,709	675,391
Total Loans	588,466	679,286
Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	62	73
Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	47
Commercial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due	648	3,822
Real estate Commercial
Financing Receivable, Recorded Investment, Past Due
Total Past Due	3,388	3,740
Current	1,245,305	1,134,250
Total Loans	1,248,693	1,137,990
Loans > 90 Days and Accruing	30
Real estate Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	612	344
Real estate Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	311	134
Real estate Commercial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due	2,465	3,262
Real estate Residential
Financing Receivable, Recorded Investment, Past Due
Total Past Due	1,476	3,545
Current	289,928	273,869
Total Loans	291,404	277,414
Loans > 90 Days and Accruing	48	71
Real estate Residential | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	317	2,072
Real estate Residential | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	302	480
Real estate Residential | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due	857	993
Consumer
Financing Receivable, Recorded Investment, Past Due
Total Past Due	610	548
Current	76,488	82,744
Total Loans	77,098	83,292
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	450	374
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	78	63
Consumer | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due
Total Past Due	82	111
PPP
Financing Receivable, Recorded Investment, Past Due
Total Loans	$ 83,521	$ 189,699

Loans, net and allowance for_10

Loans, net and allowance for loan losses - Summarized Information in Concerning to Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	$ 4,267	$ 5,377		$ 4,267	$ 5,377	$ 5,820
Unpaid Principal Balance, With no related allowance, Total	5,652	7,119		5,652	7,119	7,769
Average Recorded Investment, With no related allowance, Total	4,733	5,809		5,113	6,612	6,453
Interest Income Recognized, With no related allowance, Total	11	11		43	68	79
Recorded Investment, With an allowance recorded, Total	1,398	5,405		1,398	5,405	4,086
Unpaid Principal Balance, With an allowance recorded, Total	1,434	5,762		1,434	5,762	4,286
Related Allowance, With an allowance recorded, Total	166	1,384		166	1,384	1,202
Average Recorded Investment, With an allowance recorded, Total	1,749	5,576		2,674	4,416	4,349
Interest Income Recognized, With an allowance recorded, Total	12	27		39	40	66
Recorded Investment, Total	5,665	10,782		5,665	10,782	9,906
Unpaid Principal Balance, Total	7,086	12,881		7,086	12,881	12,055
Average Recorded Investment, Total	6,482	11,385		7,787	11,028	10,802
Interest Income Recognized, Total	23	38		82	108	145
Commercial
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	634	2,060		634	2,060	2,251
Unpaid Principal Balance, With no related allowance, Total	1,097	3,032		1,097	3,032	3,421
Average Recorded Investment, With no related allowance, Total	870	2,491		1,166	3,081	2,915
Interest Income Recognized, With no related allowance, Total	2	3		9	28	30
Recorded Investment, With an allowance recorded, Total	424	2,679		424	2,679	2,046
Unpaid Principal Balance, With an allowance recorded, Total	424	2,713		424	2,713	2,094
Related Allowance, With an allowance recorded, Total	18	1,113		18	1,113	947
Average Recorded Investment, With an allowance recorded, Total	695	2,583		1,354	2,036	2,038
Interest Income Recognized, With an allowance recorded, Total	5		$ 6	15	12	17
Recorded Investment, Total	1,058	4,739		1,058	4,739	4,297
Unpaid Principal Balance, Total	1,521	5,745		1,521	5,745	5,515
Average Recorded Investment, Total	1,565	5,074		2,520	5,117	4,953
Interest Income Recognized, Total	7	9		24	40	47
Real estate Commercial
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	2,560	2,146		2,560	2,146	2,372
Unpaid Principal Balance, With no related allowance, Total	3,275	2,749		3,275	2,749	2,964
Average Recorded Investment, With no related allowance, Total	2,785	2,094		2,805	2,092	2,148
Interest Income Recognized, With no related allowance, Total	4	3		19	25	28
Recorded Investment, With an allowance recorded, Total	534	2,015		534	2,015	1,580
Unpaid Principal Balance, With an allowance recorded, Total	564	2,254		564	2,254	1,710
Related Allowance, With an allowance recorded, Total	107	179		107	179	180
Average Recorded Investment, With an allowance recorded, Total	604	2,232		875	1,714	1,687
Interest Income Recognized, With an allowance recorded, Total	4	18		14	18	36
Recorded Investment, Total	3,094	4,161		3,094	4,161	3,952
Unpaid Principal Balance, Total	3,839	5,003		3,839	5,003	4,674
Average Recorded Investment, Total	3,389	4,326		3,680	3,806	3,835
Interest Income Recognized, Total	8	21		33	43	64
Real estate Residential
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	991	1,068		991	1,068	1,086
Unpaid Principal Balance, With no related allowance, Total	1,184	1,219		1,184	1,219	1,263
Average Recorded Investment, With no related allowance, Total	999	1,092		1,051	1,258	1,223
Interest Income Recognized, With no related allowance, Total	5	5		15	15	21
Recorded Investment, With an allowance recorded, Total	440	711		440	711	460
Unpaid Principal Balance, With an allowance recorded, Total	446	795		446	795	482
Related Allowance, With an allowance recorded, Total	41	92		41	92	75
Average Recorded Investment, With an allowance recorded, Total	450	761		445	666	624
Interest Income Recognized, With an allowance recorded, Total	3	3		10	10	13
Recorded Investment, Total	1,431	1,779		1,431	1,779	1,546
Unpaid Principal Balance, Total	1,630	2,014		1,630	2,014	1,745
Average Recorded Investment, Total	1,449	1,853		1,496	1,924	1,847
Interest Income Recognized, Total	8	8		25	25	34
Consumer
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	82	103		82	103	111
Unpaid Principal Balance, With no related allowance, Total	96	119		96	119	121
Average Recorded Investment, With no related allowance, Total	79	132		91	181	167
Recorded Investment, Total	82	103		82	103	111
Unpaid Principal Balance, Total	96	119		96	119	121
Average Recorded Investment, Total	$ 79	$ 132		$ 91	$ 181	$ 167

Loans, net and allowance for_11

Loans, net and allowance for loan losses - Loans Modified Resulting in Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)loan	Sep. 30, 2020USD ($)contract	Sep. 30, 2021USD ($)loan	Sep. 30, 2020USD ($)loancontract	Dec. 31, 2020USD ($)
Number of loans | loan	0		0	4
Pre-Modification Recorded Investment				$ 1,085
Post-Modification Recorded Investment				1,085
Number of defaults on loans restructured	$ 0		$ 0
Loans receivable, related parties, considered as nonaccrual, past due or restructured or potential credit risk	$ 2,560	$ 3,004	$ 2,560	$ 3,004	$ 2,818
Real estate Commercial
Number of loans | loan				3
Pre-Modification Recorded Investment				$ 1,073
Post-Modification Recorded Investment				$ 1,073
Real estate Residential
Number of defaults on loans restructured | contract		1		1
Recorded Investment		$ 52		$ 52
Commercial and Industrial
Number of loans | loan				1
Pre-Modification Recorded Investment				$ 12
Post-Modification Recorded Investment				$ 12

Other assets - Components of Ot

Other assets - Components of Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other real estate owned	$ 610	$ 864
Investment in low income housing partnership	5,972	6,332
Mortgage servicing rights	846	838
Restricted equity securities (FHLB and other)	3,916	5,397
Net deferred tax asset	4,918	3,768
Interest rate floor and swaps	10,690	15,371
Other assets	6,004	6,345
Total	32,956	38,915
Interest Rate Floor
Interest rate floor and swaps	1,159	1,678
Interest Rate Swaps
Interest rate floor and swaps	$ 9,531	$ 13,693

Fair value estimates - Transfer

Fair value estimates - Transfers Between Levels (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Fair value estimates
Fair value of assets transfers from level 1 to level 2	$ 0	$ 0
Fair value of assets transfers from level 2 to level 1	0	0
Fair value of liabilities transfers from level 1 to level 2	0	0
Fair value of liabilities transfers from level 2 to level 1	0	0
Fair value of assets transfers into level 3	0	0
Fair value of assets transfers out of level 3	0	0
Fair value of liabilities transfers into level 3	0	0
Fair value of liabilities transfers out of level 3	$ 0	$ 0

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	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	$ 461,519	$ 296,049
U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	135,397	18,905
U.S. government-sponsored enterprises state and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	41,590	65,188
State and Municipals, Taxable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	66,901	55,366
State and Municipals, Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	90,485	56,994
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	2,961	1,000
Mortgage-backed Securities, U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	2,158	3,707
Mortgage-backed Securities, U.S. government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	121,880	94,751
Common equity securities.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	147	138
Loan held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	997	837
Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	1,159	1,678
Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	9,531	13,693
Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	(9,277)	(14,099)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	135,544	19,043
Level 1 | U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	135,397	18,905
Level 1 | Common equity securities.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	147	138
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	325,975	277,006
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	41,590	65,188
Level 2 | State and Municipals, Taxable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	66,901	55,366
Level 2 | State and Municipals, Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	90,485	56,994
Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	2,961	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	2,158	3,707
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	121,880	94,751
Level 2 | Loan held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	997	837
Level 2 | Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	1,159	1,678
Level 2 | Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Estimate	9,531	13,693
Level 2 | Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	$ (9,277)	$ (14,099)

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	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	$ 1,232	$ 2,884
Other real estate owned	487	527
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired loans	1,232	2,884
Other real estate owned	$ 487	$ 527

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	Sep. 30, 2021	Dec. 31, 2020
Impaired loans
Fair Value Inputs, Assets, Quantitative Information
Assets, Fair Value Estimate	$ 1,232	$ 2,884
Range and weighted average of appraisal adjustments	87.00%	28.20%
Range and weighted average of liquidation expenses	5.30%	5.50%
Impaired loans | Minimum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	21.60%	9.00%
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%
Other real estate owned
Fair Value Inputs, Assets, Quantitative Information
Assets, Fair Value Estimate	$ 487	$ 527
Range and weighted average of appraisal adjustments	35.90%	29.90%
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	35.90%	3.10%
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	35.90%	58.10%
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	Sep. 30, 2021	Dec. 31, 2020
Investment securities:
Available-for-sale	$ 461,372	$ 295,911
Common equity securities	147	138
Held-to-maturity	32,556	7,513
Loans held for sale	997	837
Mortgage servicing rights	846	838
Financial liabilities:
Subordinated debentures	33,000	33,000
Carrying Value
Financial assets:
Cash and due from banks	360,587	228,192
Investment securities:
Available-for-sale	461,372	295,911
Common equity securities	147	138
Held-to-maturity	32,848	7,225
Loans held for sale	997	837
Net loans	2,178,968	2,150,638
Accrued interest receivable	8,280	8,255
Mortgage servicing rights	846	838
Restricted equity securities (FHLB and other)	3,916	5,397
Interest rate floor	1,159	1,678
Interest rate swaps	9,531	13,693
Total assets	3,058,651	2,712,802
Financial liabilities:
Deposits	2,840,919	2,437,113
Long-term debt	3,235	14,769
Subordinated debentures	33,000	33,000
Accrued interest payable	872	736
Interest rate swap	9,277	14,099
Total liabilities	2,887,303	2,499,717
Fair Value
Financial assets:
Cash and due from banks	360,587	228,192
Investment securities:
Available-for-sale	461,372	295,911
Common equity securities	147	138
Held-to-maturity	32,556	7,513
Loans held for sale	997	837
Net loans	2,154,145	2,145,752
Accrued interest receivable	8,280	8,255
Mortgage servicing rights	1,282	1,269
Restricted equity securities (FHLB and other)	3,916	5,397
Interest rate floor	1,159	1,678
Interest rate swaps	9,531	13,693
Total assets	3,033,972	2,708,635
Financial liabilities:
Deposits	2,842,487	2,441,014
Long-term debt	3,336	15,073
Subordinated debentures	32,660	33,096
Accrued interest payable	872	736
Interest rate swap	9,277	14,099
Total liabilities	2,888,632	2,504,018
Level 1
Financial assets:
Cash and due from banks	360,587	228,192
Investment securities:
Available-for-sale	135,397	18,905
Common equity securities	147	138
Level 2
Investment securities:
Available-for-sale	325,975	277,006
Held-to-maturity	32,556	7,513
Loans held for sale	997	837
Accrued interest receivable	8,280	8,255
Mortgage servicing rights	1,282	1,269
Restricted equity securities (FHLB and other)	3,916	5,397
Interest rate floor	1,159	1,678
Interest rate swaps	9,531	13,693
Financial liabilities:
Deposits	2,842,487	2,441,014
Long-term debt	3,336	15,073
Subordinated debentures	32,660	33,096
Accrued interest payable	872	736
Interest rate swap	9,277	14,099
Level 3
Investment securities:
Net loans	$ 2,154,145	$ 2,145,752

Employee benefit plans - Compon

Employee benefit plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Components of net periodic pension cost:
Salaries and employee benefits expense	$ 7,829	$ 7,831	$ 21,649	$ 22,735
Pension Benefits
Components of net periodic pension cost:
Salaries and employee benefits expense	343	308	991	968
Interest cost	105	164	315	381
Expected return on plan assets	(322)	(371)	(966)	(865)
Amortization of unrecognized net gain	76	65	227	152
Net periodic benefit	$ (141)	$ (142)	$ (424)	$ (332)

Employee benefit plans - Additi

Employee benefit plans - Additional Information (Details) - 2017 Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Common stock available for grant as awards	37,151		37,151
Salaries and employee benefits expense	$ 213	$ 192	$ 479	$ 383
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			19,818
Unrecognized compensation expense	$ 1,068		$ 1,068
Weighted average vesting period			1 year 9 months 18 days
Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Granted shares				16,269

Derivatives and hedging activ_3

Derivatives and hedging activities - Fair Values of Derivative Instruments on the Balance Sheet (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021USD ($)security	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)security	Sep. 30, 2020USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Derivatives, Fair Value
Interest rate floor and swaps	$ 10,690		$ 10,690			$ 15,371
Liability Derivatives	9,277		9,277			14,099
Interest Receivable	8,280		8,280			8,255
Interest Payable	872		872			736
Net Amounts of Assets presented in the Balance Sheet	9,277		9,277			14,099
Interest expense
Derivatives, Fair Value
Amount of gain or (loss) reclassified as a increase to interest income (expense)		$ (20)	(48)	$ 53
Interest income
Derivatives, Fair Value
Amount of gain or (loss) reclassified as a increase to interest income (expense)	153	$ 149	453	$ 327
Interest Rate Floor
Derivatives, Fair Value
Interest rate floor and swaps	1,159		1,159			1,678
Interest Rate Swaps
Derivatives, Fair Value
Interest rate floor and swaps	9,531		9,531			13,693
Credit-risk contract
Derivatives, Fair Value
Posted collateral	7,380		7,380			15,360
Net Amounts of Assets presented in the Balance Sheet	6,248		6,248			12,421
Derivatives designated as hedging instruments
Derivatives, Fair Value
Interest rate floor and swaps	1,159		1,159			1,678
Liability Derivatives						485
Derivatives designated as hedging instruments | Interest Rate Floor
Derivatives, Fair Value
Notional amount	25,000		25,000
Derivatives designated as hedging instruments | Interest Rate Floor | Other Assets.
Derivatives, Fair Value
Interest rate floor and swaps	1,159		1,159			1,678
Derivatives not designated as hedging instruments
Derivatives, Fair Value
Interest rate floor and swaps	9,531		9,531			13,693
Liability Derivatives	$ 9,277		$ 9,277			13,614
Derivatives not designated as hedging instruments | Interest Rate Swaps
Derivatives, Fair Value
Number of instruments held | security	84		84
Notional amount	$ 396,154		$ 396,154			375,341
Derivatives not designated as hedging instruments | Interest Rate Swaps | Other Assets.
Derivatives, Fair Value
Interest rate floor and swaps	9,531		9,531			13,693
Derivatives not designated as hedging instruments | Interest Rate Swaps | Other Liabilities.
Derivatives, Fair Value
Liability Derivatives	9,277		9,277			13,614
Cash Flow Hedge | Derivatives designated as hedging instruments
Derivatives, Fair Value
Derivatives terminated	25		25
Notional amount	$ 50,000		$ 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)					$ 538

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	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI Included Component			$ 980		$ 1,002
Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income		$ (20)	(23)	$ 53
Interest income
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 137	$ 133	405	279
Cash Flow Hedge
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI on Derivative			335	(468)
Amount of Gain (Loss) Recognized in OCI Included Component			331	(446)
Amount of Loss Recognized in OCI Excluded Component			4	(22)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income			357	332
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component			405	380
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Excluded Component			(48)	(48)
Cash Flow Hedge | Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI on Derivative			401	(592)
Amount of Gain (Loss) Recognized in OCI Included Component			401	(592)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income			(23)	53
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component			(23)	53
Cash Flow Hedge | Other expense
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income			(25)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component			(25)
Cash Flow Hedge | Interest Rate Floor | Interest income
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI on Derivative			(66)	124
Amount of Gain (Loss) Recognized in OCI Included Component			(70)	146
Amount of Loss Recognized in OCI Excluded Component			4	(22)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income			405	279
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component			453	327
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Excluded Component			$ (48)	$ (48)

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	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
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	$ (128)	$ (137)	$ (22)	$ 356
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	137	133	405	279
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income	137	133	405	279
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component	153	149	453	327
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component	$ (16)	(16)	(48)	(48)
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		(20)	(48)	53
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income		(20)	(23)	53
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income as a result that a forecasted transaction is no longer probable of occurring			(25)
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component		$ (20)	$ (48)	$ 53

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	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest Rate Swaps
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income	$ 7	$ 97	$ 175	$ (44)
Fee Income
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in Income	$ 72	$ 1,131	$ 569	$ 1,991

Derivatives and hedging activ_7

Derivatives and hedging activities - Offsetting Derivatives (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	$ 10,690	$ 15,371
Net Amounts of Assets presented in the Balance Sheet	10,690	15,371
Gross Amounts Not Offset in the Statement of Financial Position - Financial Instruments	3,029	1,678
Net Amount	7,661	13,693
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	9,277	14,099
Net Amounts of Assets presented in the Balance Sheet	9,277	14,099
Gross Amounts Not Offset in the Statement of Financial Position - Financial Instruments	3,029	1,678
Gross Amounts Not Offset in the Statement of Financial Position - Cash Collateral Paid		$ 12,421
Net Amount	$ 6,248

Deposits - Components of Intere

Deposits - Components of Interest-bearing and Noninterest-bearing Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deposits.
Money market accounts	$ 571,679	$ 496,634
Now accounts	780,033	567,087
Savings accounts	478,012	431,224
Time deposits less than $250	208,691	221,446
Time deposits $250 or more	89,903	98,247
Total interest-bearing deposits	2,128,318	1,814,638
Noninterest-bearing deposits	712,601	622,475
Total deposits	2,840,919	$ 2,437,113
Increase (decrease) in deposits of accounts with balances less than $250 thousand	$ 12,500

Borrowings (Details)

Borrowings (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Short-term Debt
Ending Balance	$ 0	$ 50,000
Average Balance	18,682
Maximum Month-End Balance	$ 50,000
Weighted Average Rate for the Year	0.55%
FHLB advances
Short-term Debt
Ending Balance		50,000
Average Balance	$ 18,682	83,716
Maximum Month-End Balance	$ 50,000	$ 179,199
Weighted Average Rate for the Year	0.55%	1.01%
Weighted Average Rate at End of Year		0.40%

Borrowings - Additional Informa

Borrowings - Additional Information (Details) - Peoples Bank - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Short-term Debt
Maximum borrowing capacity	$ 858,953	$ 807,042
Outstanding amount in borrowings	3,235	64,769
Amount of credit facility used to issue standby letters of credit to collateralize public fund deposits	$ 352,935	$ 218,350

Borrowings - Long-term debt adv

Borrowings - Long-term debt advances (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument
Long-term debt	$ 3,235	$ 14,769
Long-term 1.99% fixed rate debt due June 2021
Debt Instrument
Long-term debt		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	$ 3,235	$ 4,769
Fixed interest rate (as a percent)	4.69%

Borrowings - Maturities of long

Borrowings - Maturities of long-term debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Borrowings
2021	$ 524
2022	2,156
2023	555
Total long-term debt	$ 3,235	$ 14,769

Borrowings - Fixed and adjustab

Borrowings - Fixed and adjustable rate information (Details) $ in Thousands	Sep. 30, 2021USD ($)
Borrowings
FHLB long-term advances	$ 3,235

Subordinated debt (Details)

Subordinated debt (Details) - 2020 Notes $ in Thousands	Jun. 01, 2020USD ($)
Debt Instrument
Aggregate principal amount	$ 33,000
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
Floated interest rate	4.75%
Number of days notice to redeem debt	10 days

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income taxes
Federal statutory rate	15.30%	15.50%	17.70%	14.20%
Investment and other tax credits	$ 276	$ 276	$ 819	$ 821
Deferred tax adjustment			$ 621
Effective tax rate			15.80%	14.20%