Peoples Financial Services (PFIS) 10-Q 10 May 23 2023 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2023	May 01, 2023
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Transition Report	false
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		7,150,757
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001056943
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Cash and cash equivalents
Cash and due from banks	$ 31,354	$ 37,675
Interest-bearing deposits in other banks	7,129	193
Federal funds sold	102,100
Total cash and cash equivalents	140,583	37,868
Investment securities:
Available-for-sale	418,125	477,703
Equity investments carried at fair value	81	110
Held-to-maturity: Fair value March 31, 2023, $77,073; December 31, 2022, $76,563	89,705	91,179
Total investment securities	507,911	568,992
Loans	2,818,043
Less: allowance for credit losses	25,444	27,472
Net loans	2,792,599
Loans	2,818,043	2,730,116
Less: allowance for credit losses		27,472
Net loans		2,702,644
Goodwill	63,370	63,370
Premises and equipment, net	56,561	55,667
Bank owned life insurance	48,598	48,344
Deferred tax assets	16,015	18,739
Accrued interest receivable	11,678	11,715
Intangible assets, net	77	105
Other assets	41,079	46,071
Total assets	3,678,471	3,553,515
Deposits:
Noninterest-bearing	746,089	772,765
Interest-bearing	2,489,878	2,273,833
Total deposits	3,235,967	3,046,598
Short-term borrowings	17,280	114,930
Long-term debt	25,000	555
Subordinated debentures	33,000	33,000
Accrued interest payable	2,304	903
Other liabilities	36,286	42,179
Total liabilities	3,349,837	3,238,165
Stockholders' equity:
Common stock, par value $2.00, authorized 25,000,000 shares, issued and outstanding 7,150,757 shares at March 31, 2023 and 7,158,017 shares at December 31, 2022	14,323	14,321
Capital surplus	126,231	126,850
Retained earnings	237,522	230,515
Accumulated other comprehensive loss	(49,442)	(56,336)
Total stockholders' equity	328,634	315,350
Total liabilities and stockholders' equity	$ 3,678,471	$ 3,553,515

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
CONSOLIDATED BALANCE SHEETS
Held-to-maturity, Fair value	$ 77,073	$ 76,563
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	7,150,757	7,158,017
Common stock, shares outstanding	7,150,757	7,158,017

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest and fees on loans:
Taxable	$ 30,049	$ 20,853
Tax-exempt	1,389	1,161
Interest and dividends on investment securities:
Taxable	2,124	1,972
Tax-exempt	457	510
Dividends	2
Interest on interest-bearing deposits in other banks	14	2
Interest on federal funds sold	243	73
Total interest income	34,278	24,571
Interest expense:
Interest on deposits	9,678	1,468
Interest on short-term borrowings	1,086
Interest on long-term debt	27	28
Interest on subordinated debt	443	444
Total interest expense	11,234	1,940
Net interest income	23,044	22,631
Provision for credit losses	1,264	300
Net interest income after provision for credit losses	21,780	22,331
Noninterest income:
Mortgage banking income	103	144
Increase in cash surrender value of life insurance	258	218
Interest rate swap revenue	223	343
Net (losses) gains on equity investment securities	(29)	4
Net gains on sale of investment securities available for sale	81
Total noninterest income	3,674	3,421
Noninterest expense:
Salaries and employee benefits expense	9,080	8,040
Net occupancy and equipment expense	4,103	3,825
Amortization of intangible assets	29	96
Net gain on sale of other real estate owned		(458)
Professional fees and outside services	619	470
FDIC insurance and assessments	501	326
Donations	397	334
Other expenses	1,757	1,656
Total noninterest expense	16,486	14,289
Income before income taxes	8,968	11,463
Provision for income tax expense	1,389	1,833
Net income	7,579	9,630
Other comprehensive income (loss):
Unrealized gain (loss) on investment securities available-for-sale	10,836	(32,612)
Reclassification adjustment for net gain on sales included in net income	(81)
Change in derivative fair value	(1,970)	(493)
Other comprehensive income (loss)	8,785	(33,105)
Income tax expense (benefit) related to other comprehensive income (loss)	1,891	(6,952)
Other comprehensive income (loss), net of income tax expense (benefit)	6,894	(26,153)
Comprehensive income (loss)	$ 14,473	$ (16,523)
Per share data:
Basic	$ 1.06	$ 1.34
Diluted	$ 1.05	$ 1.33
Average common shares outstanding:
Basic	7,157,553	7,172,455
Diluted	7,198,970	7,216,421
Dividends declared	$ 0.41	$ 0.39
Service charges, fees, commissions and other
Noninterest income:
Revenue from contracts with customers	$ 1,965	$ 1,692
Merchant services income
Noninterest income:
Revenue from contracts with customers	118	114
Commission and fees on fiduciary activities
Noninterest income:
Revenue from contracts with customers	557	555
Wealth management income
Noninterest income:
Revenue from contracts with customers	$ 398	$ 351

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Capital Surplus	Retained Earnings Cumulative impact of adoption	Retained Earnings	Accumulated Other Comprehensive Loss	Cumulative impact of adoption	Total
Balance at Dec. 31, 2021	$ 14,341	$ 127,549		$ 203,750	$ (5,514)		$ 340,126
Net income				9,630			9,630
Other comprehensive income (loss), net of income tax					(26,153)		(26,153)
Dividends declared				(2,796)			(2,796)
Stock based compensation		(28)					(28)
Restricted stock issued: unearned income	24	(24)
Share retirement	(13)	(305)					(318)
Balance at Mar. 31, 2022	14,352	127,192		210,584	(31,667)		320,461
Balance at Dec. 31, 2022	14,321	126,850		230,515	(56,336)		315,350
Net income				7,579			7,579
Other comprehensive income (loss), net of income tax					6,894		6,894
Dividends declared				(2,936)			(2,936)
Stock based compensation		209					209
Restricted stock issued: unearned income	35	(35)
Share retirement	(33)	(793)					(826)
Balance (ASU 2016-13) at Mar. 31, 2023			$ 2,364			$ 2,364
Balance at Mar. 31, 2023	$ 14,323	$ 126,231		$ 237,522	$ (49,442)		$ 328,634

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
Dividends declared (in dollars per share)	$ 0.41	$ 0.39
Restricted stock issued, shares	17,640	12,332
Share retirement, shares	16,573	6,714
Unearned income		$ 210

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 7,579	$ 9,630
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment	703	663
Amortization of right-of-use lease asset	124	146
Amortization of deferred loan fees, net	150	949
Amortization of intangibles	29	96
Amortization of low income housing partnerships	121	121
Provision for credit losses	1,264	300
Net unrealized loss (gain) on equity investment securities	29	(4)
Net gain on sale of other real estate owned		(458)
Loans originated for sale	(1,244)	(3,798)
Proceeds from sale of loans originated for sale	1,245	4,069
Net gain on sale of loans originated for sale	(1)	(24)
Net amortization of investment securities	290	431
Net loss (gain) on sale of investment securities available-for-sale	(81)
Gain on sale of premises and equipment	(14)	(5)
Increase in cash surrender value of life insurance	(258)	(218)
Deferred income tax expense	183	4
Stock based compensation	209	(28)
Net change in:
Accrued interest receivable	37	(693)
Other assets	(3,019)	(3,869)
Accrued interest payable	1,401	436
Other liabilities	(4,198)	1,388
Net cash provided by operating activities	4,549	9,136
Cash flows from investing activities:
Proceeds from sales of investment securities available-for-sale	67,362
Proceeds from repayments of investment securities:
Available-for-sale	2,791	12,897
Held-to-maturity	1,446	1,207
Purchases of investment securities:
Available-for-sale		(64,051)
Held-to-maturity		(25,873)
Net redemption of restricted equity securities	4,743	1,352
Net increase in loans	(88,086)	(69,733)
Investment in bank owned life insurance		(1,081)
Purchases of premises and equipment	(2,506)	(1,284)
Proceeds from the sale of premises and equipment	14	5
Proceeds from bank owned life insurance		225
Proceeds from sale of other real estate owned		946
Net cash used in investing activities	(14,236)	(145,390)
Cash flows from financing activities:
Net increase in deposits	189,369	1,467
Proceeds from long-term debt	25,000
Repayment of long-term debt	(555)	(529)
Net decrease in short-term borrowings	(97,650)
Retirement of common stock	(826)	(318)
Cash dividends paid	(2,936)	(2,796)
Net cash provided (used) by financing activities	112,402	(2,176)
Net increase (decrease) in cash and cash equivalents	102,715	(138,430)
Cash and cash equivalents at beginning of period	37,868	279,933
Cash and cash equivalents at end of period	140,583	141,503
Cash paid during the period for:
Interest	9,833	1,504
Income taxes	47	$ 35
Noncash items:
Initial recognition of right-of-use assets	(785)
Initial recognition of lease liability	$ (820)

Summary of significant accounti

Summary of significant accounting policies	3 Months Ended
	Mar. 31, 2023
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 months ended and as of March 31, 2023, 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 credit losses, fair value of financial instruments, the valuation of deferred tax assets, 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, 2022. ​ Second Quarter Dividend Decl aration ​ On April 28, 2023, the Board of Directors declared a second quarter dividend of $0.41 per share. The dividend is payable on June 15, 2023 to shareholders of record as of May 31, 2023. ​ Adoption of New Accounting Standard ​ On January 1, 2023, the Company adopted ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, which replaces the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss (CECL) model. The Company adopted ASU 2016-13 using a modified retrospective approach. Results for reporting periods beginning after January 1, 2023 are presented under Topic 326, while prior period amounts continue to be reported in accordance with previously applicable GAAP. At adoption, the Company decreased its allowance for credit losses by $3.0 million. Upon adoption the Company recorded a cumulative effect adjustment that increased stockholders’ equity by $2.4 million, net of tax. The Company adopted ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures” effective January 1, 2023. The ASU addresses and amends areas identified by the FASB as part of its post-implementation review of the accounting standard that introduced the current expected credit losses model. The amendments eliminate the accounting guidance for troubled debt restructurings by creditors that have adopted the current expected credit losses model and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require disclosure of current-period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. ​ Allowance for Credit Losses ​ The allowance for credit losses represents the estimated amount considered necessary to cover lifetime expected credit losses inherent in financial assets at the balance sheet date. The measurement of expected credit losses is applicable to loans receivable and securities measured at amortized cost. It also applies to off-balance sheet credit exposures such as loan commitments and unused lines of credit. The allowance is established through a provision for credit losses that is charged against income. The methodology for determining the allowance for credit losses is considered a critical accounting policy by management because of the high degree of judgment involved, the subjectivity of the assumptions used, and the potential for changes in the forecasted economic environment that could result in changes to the amount of the recorded allowance for credit losses. The allowance for credit losses is reported separately as a contra-asset on the consolidated balance sheets. The expected credit loss for unfunded lending commitments and unfunded loan commitments is reported on the consolidated balance sheets in other liabilities while the provision for credit losses related to unfunded commitments is reported in other non-interest expense in the consolidated statements of income and comprehensive income (loss). ​ Allowance for Credit Losses on Loans Receivable ​ The allowance for credit losses on loans is deducted from the amortized cost basis of the loan to present the net amount expected to be collected. Expected losses are evaluated and calculated on a collective, or pooled, basis for those loans which share similar risk characteristics. The Company has chosen to segment its portfolio consistent with the manner in which it manages credit risk. Such segments include residential real estate, consumer, commercial and industrial, commercial real estate and municipal. At each reporting period, the Company evaluates whether loans within a pool continue to exhibit similar risk characteristics. If the risk characteristics of a loan change, such that they are no longer similar to other loans in the pool, the Company will evaluate the loan with a different pool of loans that share similar risk characteristics. If the loan does not share risk characteristics with other loans, the Company will evaluate the loan on an individual basis. The Company evaluates the pooling methodology at least annually. Loans are charged off against the allowance for credit losses when the Company believes the balances to be uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged off or expected to be charged off. ​ The Company estimates the allowance for credit losses on loans using an advanced probability of default model which incorporates probability of default, loss given default, exposure at default and probability of attrition attributes. The model considers relevant available information at both the portfolio and loan level from internal data that is supplemented by shared data pool information. The model also incorporates reasonable and supportable economic forecasts. After the reasonable and supportable forecast period, the model reverts to average historical losses. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications. ​ Also included in the allowance for credit losses on loans are qualitative reserves to cover losses that are expected but, in the Company’s assessment, may not be adequately represented in the quantitative analysis described above. Factors that the Company considers include changes in lending policies and procedures, changes in management, changes in the quality of the loan review process, the existence of any concentrations of credit and other external factors. ​ Individually Evaluated Loans ​ On a case-by-case basis, the Company may conclude that a loan should be evaluated on an individual basis based on its disparate risk characteristics. The Bank has determined that any loans currently on non-accrual status or are 90 or more days past due and still accruing are considered impaired and should be individually evaluated for losses. When the Company determines that a loan no longer shares similar risk characteristics with other loans in the portfolio, the allowance will be determined on an individual basis using the present value of expected cash flows or, for collateral-dependent loans, the fair value of the collateral as of the reporting date, less estimated selling costs, as applicable. If the fair value of the collateral is less than the amortized cost basis of the loan, the Company will establish a reserve for the difference between the fair value of the collateral, less costs to sell and carrying costs at the reporting date and the amortized cost basis of the loan. If this amount is deemed uncollectible, the Company will charge-off that amount. ​ Acquired Loans ​ Acquired loans are included in the Company's calculation of the allowance for credit losses. How the allowance on an acquired loan is recorded depends on whether or not it has been classified as a Purchased Credit Deteriorated (“PCD”) loan. PCD loans are loans acquired at a discount that is due, in part, to credit quality. PCD loans are accounted for in accordance with ASC Subtopic 326-20 and are initially recorded at fair value as determined by the sum of the present value of expected future cash flows and an allowance for credit losses at acquisition. The allowance for PCD loans is recorded through a gross-up effect, while the allowance for acquired non-PCD loans is recorded through provision expense, consistent with originated loans. Thus, the determination of which loans are PCD and non-PCD can have a significant impact on the accounting for these loans. Subsequent to acquisition, the allowance for PCD loans will generally follow the same estimation, provision and charge-off process as non-PCD acquired and originated loans. ​ Under FASB ASC Topic 326, a PCD asset is defined as an individual financial asset that as of the date of acquisition has experienced a more than insignificant deterioration in credit quality since origination as determined during the acquisition process. Upon identification of these assets, the amortized cost basis will be adjusted at the time of acquisition to reflect any impairment amount. After acquisition, PCD loans will be either collectively evaluated for reserve requirements or individually evaluated if on nonaccrual status or are 90 or more days past due and still accruing. ​ Allowance for Credit Losses on Off-Balance Sheet Commitments ​ The Company is required to include unfunded commitments that are expected to be funded in the future within the allowance calculation, other than those that are unconditionally cancelable. To arrive at that reserve, the reserve percentage for each applicable segment is applied to the unused portion of the expected commitment balance and is multiplied by the expected funding rate. To determine the expected funding rate, the Company uses a historical utilization rate for each segment. As noted above, the allowance for credit losses on unfunded loan commitments is included in other liabilities on the consolidated balance sheets and the related credit expense is recorded in other non-interest expense in the consolidated statements of income and comprehensive income (loss). ​ Allowance for Credit Losses on Held to Maturity Securities ​ The Company’s portfolio of held to maturity securities consists of municipal bonds and U.S. agency residential mortgage-backed securities which are highly rated by major rating agencies and have a long history of no credit losses. In estimating the net amount expected to be collected for held to maturity securities in an unrealized loss position, a historical loss based method is utilized. ​ Allowance for Credit Losses on Available for Sale Securities ​ For available for sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For securities available for sale that do not meet the above criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the extent to which fair value is less than amortized cost, any changes to the rating by a rating agency, and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of tax. The Company elected the practical expedient of zero loss estimates for securities issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major agencies and have a long history of no credit losses. ​ Accrued Interest Receivable ​ The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of loans, available for sale securities, and held to maturity securities. Accrued interest receivable on loans is reported as a component of accrued interest receivable on the Consolidated Balance Sheets, totaled $9.8 million at March 31, 2023 and is excluded from the estimate of credit losses. Accrued interest receivable on available of sale securities and held to maturity securities, also a component of accrued interest receivable on the Consolidated Balance Sheets, totaled $1.6 million and $191 thousand, respectively, at March 31, 2023 and is excluded from the estimate of credit losses. ​ 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, 2022. ​ 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. ​ ASU 2023-01, “Leases (Topic 842) - Common Control Arrangements” (ASU 2023-01) requires entities to determine whether a related party arrangement between entities under common control is a lease. If the arrangement is determined to be a lease, an entity must classify and account for the lease on the same basis as an arrangement with an unrelated party (on the basis of legally enforceable terms and conditions). ASU 2023-01 is effective January 1, 2024 and is not expected to have an impact on our financial statements. ​ ASU 2023-02 “Investments - Equity Method and Join Ventures (Topic 323) - Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method” (ASU 2023-02) permits reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. ASU 2023-02 is effective January 1, 2024 and is not expected to have an impact on our financial statements. ​ ​ ​ ​

Other comprehensive income (los

Other comprehensive income (loss)	3 Months Ended
	Mar. 31, 2023
Other comprehensive income (loss)
Other comprehensive income (loss)	2. Other comprehensive income (loss): T ​ The components of accumulated other comprehensive loss included in stockholders’ equity at March 31, 2023 and December 31, 2022 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 ​ December 31, 2022 Net unrealized loss on investment securities available-for-sale ​ $ (55,495) ​ $ (66,250) ​ Income tax benefit ​ (11,950) ​ (14,266) ​ Net of income taxes ​ (43,545) ​ (51,984) ​ Benefit plan adjustments ​ (5,499) ​ (5,499) ​ Income tax benefit ​ (1,184) ​ (1,184) ​ Net of income taxes ​ (4,315) ​ (4,315) ​ Derivative adjustments ​ (2,017) ​ (47) ​ Income tax benefit ​ (434) ​ (10) ​ Net of income taxes ​ (1,583) ​ (37) ​ Accumulated other comprehensive loss ​ $ (49,442) ​ $ (56,336) ​ ​

Earnings per share

Earnings per share	3 Months Ended
	Mar. 31, 2023
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 months ended March 31, 2023 and 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 ​ 2022 ​ (Dollars in thousands, except percents) ​ Basic ​ Diluted ​ Basic ​ Diluted ​ Net income $ 7,579 $ 7,579 $ 9,630 ​ $ 9,630 Average common shares outstanding ​ 7,157,553 ​ 7,198,970 ​ 7,172,455 ​ 7,216,421 ​ Earnings per share ​ $ 1.06 ​ $ 1.05 ​ $ 1.34 ​ $ 1.33 ​ ​

Investment securities

Investment securities	3 Months Ended
	Mar. 31, 2023
Investment securities
Investment securities	4. Investment securities: ​ The amortized cost and fair value of investment securities aggregated by investment category at March 31, 2023 and December 31, 2022 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 197,660 ​ $ ​ ​ $ 16,096 ​ $ 181,564 ​ U.S. government-sponsored enterprises ​ ​ 16,872 ​ ​ ​ ​ ​ 441 ​ ​ 16,431 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 68,426 ​ ​ 5 ​ ​ 11,227 ​ 57,204 ​ Tax-exempt ​ 77,668 ​ 1 ​ ​ 9,095 ​ 68,574 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 942 ​ ​ ​ ​ 34 ​ 908 ​ U.S. government-sponsored enterprises ​ 95,947 ​ ​ ​ 17,735 ​ 78,212 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 12,105 ​ ​ ​ 484 ​ 11,621 ​ Corporate debt securities ​ ​ 4,000 ​ ​ ​ ​ ​ 389 ​ ​ 3,611 ​ Total ​ $ 473,620 ​ $ 6 ​ $ 55,501 ​ $ 418,125 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 11,228 ​ $ 8 ​ $ 674 ​ $ 10,562 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 16,806 ​ ​ ​ ​ 2,541 ​ 14,265 ​ U.S. government-sponsored enterprises ​ 61,671 ​ ​ ​ ​ 9,425 ​ 52,246 ​ Total ​ $ 89,705 ​ $ 8 ​ $ 12,640 ​ $ 77,073 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 199,937 ​ $ ​ ​ $ 19,640 ​ $ 180,297 ​ U.S. government-sponsored enterprises ​ ​ 16,955 ​ ​ ​ ​ ​ 585 ​ 16,370 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 68,946 ​ ​ ​ ​ 13,588 ​ 55,358 ​ Tax-exempt ​ 99,774 ​ 93 ​ 11,460 ​ 88,407 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 982 ​ ​ ​ 40 ​ 942 ​ U.S. government-sponsored enterprises ​ 141,231 ​ ​ ​ 20,112 ​ 121,119 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ ​ 12,128 ​ ​ ​ ​ ​ 544 ​ ​ 11,584 ​ Corporate debt securities ​ ​ 4,000 ​ ​ ​ ​ ​ 374 ​ ​ 3,626 ​ Total ​ $ 543,953 ​ $ 93 ​ $ 66,343 ​ $ 477,703 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 11,237 ​ $ 1 ​ $ 841 ​ $ 10,397 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ 17,304 ​ ​ ​ ​ 3,016 ​ 14,288 ​ U.S. government-sponsored enterprises ​ 62,638 ​ ​ ​ ​ 10,760 ​ 51,878 ​ Total ​ $ 91,179 ​ $ 1 ​ $ 14,617 ​ $ 76,563 ​ ​ The Company had net unrealized losses on available-for-sale securities of $43.5 million net of deferred income taxes of $12.0 million at March 31, 2023 and net unrealized losses on available-for-sale securities of $52.0 million net of deferred income taxes of $14.3 million at December 31, 2022. During the three month period ended March 31, 2023, investment securities, including U.S. Treasury bonds and mortgage-backed securities, with a par value of $65.6 million were sold at a net gain of $81 thousand. The proceeds were used to pay-down higher cost short-term borrowings. ​ The maturity distribution of the fair value, which is the net carrying amount, of the debt securities classified as available-for-sale at March 31, 2023, is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ Fair (Dollars in thousands) Value Within one year ​ $ 15,202 ​ After one but within five years ​ 176,975 ​ After five but within ten years ​ 66,629 ​ After ten years ​ 66,319 ​ ​ ​ 325,125 ​ Mortgage-backed and other amortizing securities ​ 93,000 ​ Total ​ $ 418,125 ​ ​ The maturity distribution of the amortized cost and fair value, of debt securities classified as held-to-maturity at March 31, 2023, is summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair (Dollars in thousands) Cost Value Within one year ​ $ ​ ​ $ ​ ​ After one but within five years ​ ​ ​ ​ ​ ​ ​ After five but within ten years ​ ​ 8,877 ​ ​ 8,355 ​ After ten years ​ ​ 2,351 ​ ​ 2,207 ​ ​ ​ 11,228 ​ 10,562 ​ Mortgage-backed securities ​ 78,477 ​ 66,511 ​ Total ​ $ 89,705 ​ $ 77,073 ​ ​ Securities with a carrying value of $151.2 million and $168.0 million at March 31, 2023 and December 31, 2022, 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 March 31, 2023 and December 31, 2022, there were no significant concentrations of credit risk from any one issuer, with the exception of U.S. government agencies and sponsored enterprises, which exceeded 10.0 percent of stockholders’ equity. ​ The fair value and gross unrealized losses of investment securities with unrealized losses at March 31, 2023 and December 31, 2022, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position, are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ Less Than 12 Months ​ 12 Months or Greater ​ Total ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ (Dollars in thousands) Loss Position Value Losses Loss Position Value Losses Loss Position Value Losses ​ U.S. Treasury securities ​ ​ ​ $ ​ ​ $ ​ ​ 43 ​ $ 181,564 ​ $ 16,096 ​ 43 ​ $ 181,564 ​ $ 16,096 ​ U.S. government-sponsored enterprises ​ ​ ​ ​ ​ ​ ​ ​ ​ 5 ​ ​ 16,431 ​ ​ 441 ​ 5 ​ ​ 16,431 ​ ​ 441 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 2 ​ ​ 999 ​ ​ 19 ​ 63 ​ ​ 54,709 ​ ​ 11,208 ​ 65 ​ ​ 55,708 ​ ​ 11,227 ​ Tax-exempt ​ 7 ​ ​ 3,095 ​ ​ 29 ​ 98 ​ ​ 70,366 ​ ​ 9,740 ​ 105 ​ ​ 73,461 ​ ​ 9,769 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 2 ​ ​ 818 ​ ​ 31 ​ 7 ​ ​ 14,355 ​ ​ 2,544 ​ 9 ​ ​ 15,173 ​ ​ 2,575 ​ U.S. government-sponsored enterprises ​ 1 ​ ​ 527 ​ ​ 12 ​ 40 ​ ​ 129,931 ​ ​ 27,148 ​ 41 ​ ​ 130,458 ​ 27,160 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 1 ​ 1,926 ​ 86 ​ 3 ​ ​ 9,695 ​ ​ 398 ​ 4 ​ 11,621 ​ 484 ​ Corporate debt securities ​ ​ ​ ​ ​ ​ ​ ​ ​ 6 ​ ​ 3,611 ​ ​ 389 ​ 6 ​ ​ 3,611 ​ ​ 389 ​ Total ​ 13 ​ $ 7,365 ​ $ 177 ​ 265 ​ $ 480,662 ​ $ 67,964 ​ 278 ​ $ 488,027 ​ $ 68,141 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ Less Than 12 Months ​ 12 Months or Greater ​ Total ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ (Dollars in thousands) Loss Position Value Losses Loss Position Value Losses Loss Position Value Losses ​ U.S. Treasury securities ​ 5 ​ $ 23,700 ​ $ 1,887 ​ 40 ​ $ 156,597 ​ $ 17,753 ​ 45 ​ $ 180,297 ​ $ 19,640 ​ U.S. government-sponsored enterprises ​ 4 ​ ​ 14,104 ​ ​ 197 ​ 1 ​ ​ 2,266 ​ ​ 388 ​ 5 ​ ​ 16,370 ​ ​ 585 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 21 ​ ​ 19,919 ​ ​ 2,908 ​ 45 ​ ​ 34,464 ​ ​ 10,680 ​ 66 ​ ​ 54,383 ​ ​ 13,588 ​ Tax-exempt ​ 39 ​ 30,973 ​ 1,690 ​ 84 ​ ​ 59,664 ​ 10,611 ​ 123 ​ 90,637 ​ 12,301 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 5 ​ ​ 904 ​ 39 ​ 4 ​ ​ 14,326 ​ ​ 3,017 ​ 9 ​ 15,230 ​ 3,056 ​ U.S. government-sponsored enterprises ​ 19 ​ 57,166 ​ 2,029 ​ 25 ​ ​ 115,831 ​ ​ 28,843 ​ 44 ​ 172,997 ​ 30,872 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 4 ​ ​ 11,584 ​ ​ 544 ​ ​ ​ ​ ​ ​ ​ ​ ​ 4 ​ 11,584 ​ 544 ​ Corporate debt securities ​ 1 ​ 953 ​ 47 ​ 5 ​ ​ 2,673 ​ ​ 327 ​ 6 ​ 3,626 ​ 374 ​ Total ​ 98 ​ $ 159,303 ​ $ 9,341 ​ 204 ​ $ 385,821 ​ $ 71,619 ​ 302 ​ $ 545,124 ​ $ 80,960 ​ ​ ​ As described in Note 1, on January 1, 2023 the Company adopted amended accounting guidance that requires an allowance for credit losses be deducted from the amortized cost basis of financial assets, including investment securities held to maturity, to present the net carrying value at the amount that is expected to be collected over the contractual term of the asset. The Company estimated no allowance for credit losses for its investment securities classified as held-to-maturity at January 1, 2023 or March 31, 2023, as the portfolio of held-to-maturity securities consists entirely of U.S. government sponsored enterprises, agencies and states and political subdivisions investments. ​ The unrealized losses on securities are primarily due to the changes in market interest rates subsequent to purchase. In addition, the Company does not intend to sell and does not believe that it is more likely than not that it will be required to sell these investments until there is a full recovery of the unrealized loss, which may be at maturity. As a result, there was no allowance for credit loss required on available-for-sale debt securities in an unrealized loss position at March 31, 2023 and December 31, 2022. ​ ​

Loans, net and allowance for cr

Loans, net and allowance for credit losses	3 Months Ended
	Mar. 31, 2023
Loans, net and allowance for credit losses
Loans, net and allowance for credit losses	5. Loans, net and allowance for credit losses: ​ The major classifications of loans outstanding, net of deferred loan origination fees and costs at March 31, 2023 and December 31, 2022 are summarized as follows. The Company had net deferred loan origination fees of $0.1 million and $0.3 million at March 31, 2023 and December 31, 2022, respectively. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 December 31, 2022 Commercial and Industrial ​ $ 430,098 ​ $ 433,048 ​ Municipal ​ ​ 169,278 ​ ​ 166,210 ​ Total ​ ​ 599,376 ​ ​ 599,258 ​ Real estate ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 1,782,911 ​ 1,709,827 ​ Residential ​ ​ 342,459 ​ 330,728 ​ Total ​ ​ 2,125,370 ​ ​ 2,040,555 ​ Consumer ​ ​ ​ ​ ​ ​ ​ Indirect Auto ​ ​ 86,587 ​ ​ 76,461 ​ Consumer Other ​ ​ 6,710 ​ 13,842 ​ Total ​ ​ 93,297 ​ ​ 90,303 ​ Total ​ $ 2,818,043 ​ $ 2,730,116 ​ ​ ​ 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 or five years , 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. PPP 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. ​ The Bank originated additional loans through the PPP, which expired on May 31, 2021. During 2021, the Bank had generated and received SBA approval on 1,062 PPP loans totaling $121.6 million and generated $4.4 million in related deferred PPP net fees. ​ Included in the commercial and industrial balances at March 31, 2023 are Paycheck Protection Program (PPP) loans that had an outstanding balance of $22.2 million comprised of $10.9 million remaining from those originated during 2021 as part of round two and $11.3 million remaining from loans originated during 2020 under round one of the program. At December 31, 2022, PPP loans had outstanding balances totaling $22.3 million. Net deferred loan origination fees remaining related to PPP loans was $0.2 million at March 31, 2023 and December 31, 2022. The PPP loans are risk rated ‘Pass’ and do not carry an allowance for credit losses due to a 100% SBA guarantee. At March 31, 2023 and December 31, 2022, the outstanding PPP balances were considered current. ​ The following tables present the balance of the allowance for credit losses at March 31, 2023 and 2022. For the three months ended March 31, 2023, the balance of the allowance for credit losses is based on the CECL methodology, as presented in Note 1. For the three months ended March 31, 2022, the allowance for loan losses is based upon the calculation methodology as described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022. The tables identify the valuation allowances attributable to specifically identified impairments on individually evaluated loans, including those acquired with deteriorated credit quality, as well as valuation allowances for impairments on loans evaluated collectively. The tables include the underlying balance of loans receivable applicable to each category as of those dates. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ March 31, 2023 Commercial Municipal Commercial Residential ​ Consumer ​ Total Allowance for credit losses: ​ $ 4,365 ​ $ 1,247 ​ $ 17,915 ​ $ 3,072 ​ $ 873 ​ $ 27,472 ​ Impact of adopting ASU 2016-13 ​ ​ (1,683) ​ ​ 747 ​ ​ (3,344) ​ ​ 987 ​ ​ 30 ​ ​ (3,263) ​ Adjusted Beginning Balance January 1, 2023 ​ ​ 2,682 ​ ​ 1,994 ​ ​ 14,571 ​ ​ 4,059 ​ ​ 903 ​ ​ 24,209 ​ Charge-offs ​ (4) ​ ​ ​ ​ ​ ​ ​ (71) ​ (75) ​ Recoveries ​ ​ ​ ​ ​ 1 ​ 16 ​ 49 ​ 66 ​ Provisions (credits) ​ (197) ​ 324 ​ 1,120 ​ (207) ​ 204 ​ 1,244 ​ Ending balance ​ $ 2,481 ​ $ 2,318 ​ $ 15,692 ​ $ 3,868 ​ $ 1,085 ​ $ 25,444 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ March 31, 2022 Commercial Municipal Commercial Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance January 1, 2022 ​ $ 7,466 ​ $ 987 ​ $ 15,928 ​ $ 3,209 ​ $ 793 ​ $ 28,383 ​ Charge-offs ​ (161) ​ ​ ​ (132) ​ ​ ​ (62) ​ (355) ​ Recoveries ​ 9 ​ ​ ​ 16 ​ 3 ​ 51 ​ 79 ​ Provisions (credits) ​ (887) ​ 179 ​ 977 ​ 43 ​ (12) ​ 300 ​ Ending balance ​ $ 6,427 $ 1,166 $ 16,789 ​ $ 3,255 ​ $ 770 ​ $ 28,407 ​ ​ The following table represents the allowance for credit losses by major classification of loan and whether the loans were individually or collectively evaluated and collateral dependent by class of loans at March 31, 2023 under ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ March 31, 2023 Commercial Municipal Commercial Residential Consumer Total Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 2,481 ​ $ 2,318 ​ $ 15,692 $ 3,868 ​ $ 1,085 ​ $ 25,444 Ending balance: individually evaluated 14 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14 Ending balance: collectively evaluated $ 2,467 ​ $ 2,318 ​ $ 15,692 ​ $ 3,868 ​ $ 1,085 ​ $ 25,430 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 430,098 ​ $ 169,278 ​ $ 1,782,911 $ 342,459 ​ $ 93,297 ​ $ 2,818,043 Individually evaluated - collateral dependent - real estate ​ 10 ​ ​ ​ ​ 867 ​ ​ 789 ​ ​ ​ ​ 1,666 Individually evaluated - collateral dependent - non-real estate ​ ​ 14 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14 ​ Collectively evaluated ​ ​ 430,074 ​ ​ 169,278 ​ ​ 1,782,044 ​ ​ 341,670 ​ ​ 93,297 ​ ​ 2,816,363 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The following table represents the allowance for loan losses by major classification of loan and whether the loans were individually or collectively evaluated for impairment at December 31, 2022 prior to the adoption of ASU 2016-13. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2022 Commercial Municipal Commercial Residential Consumer Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 4,365 ​ $ 1,247 ​ $ 17,915 $ 3,072 ​ $ 873 ​ $ 27,472 Ending balance: individually evaluated for impairment 19 ​ ​ ​ ​ ​ ​ ​ 21 ​ ​ ​ ​ 40 Ending balance: collectively evaluated for impairment $ 4,346 ​ $ 1,247 ​ $ 17,915 ​ $ 3,051 ​ $ 873 ​ $ 27,432 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 433,048 ​ $ 166,210 ​ $ 1,709,827 $ 330,728 ​ $ 90,303 ​ $ 2,730,116 Ending balance: individually evaluated for impairment ​ 98 ​ ​ ​ ​ 2,063 ​ ​ 1,760 ​ ​ ​ ​ 3,921 Ending balance: collectively evaluated for impairment ​ ​ 432,950 ​ ​ 166,210 ​ ​ 1,707,764 ​ ​ 328,968 ​ ​ 90,303 ​ ​ 2,726,195 ​ ​ Nonaccrual Loans ​ . ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recorded for ​ ​ ​ ​ Total ​ ​ Nonaccrual with ​ ​ Nonaccrual with ​ ​ Nonaccrual Loans ​ ​ ​ ​ Nonaccrual ​ ​ an Allowance for ​ ​ no Allowance for ​ ​ in the three months ​ (Dollars in thousands) ​ Loans ​ ​ Credit Losses ​ ​ Credit Losses ​ ​ ended March 31, 2023 Commercial ​ $ 14 ​ $ 14 ​ $ ​ ​ $ 5 ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 867 ​ ​ ​ 867 ​ 374 ​ Residential ​ 723 ​ ​ ​ 723 ​ ​ ​ Consumer ​ 194 ​ ​ ​ 194 ​ ​ ​ Total ​ $ 1,798 ​ $ 14 ​ $ 1,784 ​ $ 379 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recorded for ​ ​ ​ ​ Total ​ ​ Nonaccrual with ​ ​ Nonaccrual with ​ ​ Nonaccrual Loans ​ ​ ​ ​ Nonaccrual ​ ​ an Allowance for ​ ​ no Allowance for ​ ​ in the three months ​ (Dollars in thousands) ​ Loans ​ ​ Credit Losses ​ ​ Credit Losses ​ ​ ended December 31, 2022 Commercial ​ $ 86 ​ $ 19 ​ $ 67 ​ $ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,155 ​ ​ ​ 1,155 ​ ​ ​ Residential ​ 562 ​ ​ ​ 562 ​ ​ ​ Consumer ​ 232 ​ ​ ​ 232 ​ ​ ​ Total ​ $ 2,035 ​ $ 19 ​ $ 2,016 ​ $ ​ ​ ​ The following table summarizes information concerning impaired loans, which include nonaccrual loans, troubled debt restructurings and loans past due 90 days or more and still accruing, as of and for the three months ended March 31, 2022 by major loan classification: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Quarter Ended ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income (Dollars in thousands) Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 138 ​ $ 475 ​ $ ​ ​ $ 148 ​ $ 2 Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,748 ​ 3,505 ​ ​ ​ ​ 2,562 ​ ​ 12 Residential ​ 874 ​ 1,047 ​ ​ ​ ​ 874 ​ ​ 4 Consumer ​ 207 ​ 217 ​ ​ ​ ​ 173 ​ ​ ​ Total ​ 3,967 ​ 5,244 ​ ​ ​ ​ 3,757 ​ ​ 18 With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 21 ​ 21 ​ ​ 21 ​ 31 ​ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 440 ​ 452 ​ 45 ​ 477 ​ 4 Residential ​ 273 ​ 274 ​ 49 ​ 338 ​ 3 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 734 ​ 747 ​ 115 ​ 846 ​ 7 Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 159 ​ 496 ​ 21 ​ 179 ​ 2 Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,188 ​ 3,957 ​ 45 ​ 3,039 ​ 16 Residential ​ 1,147 ​ 1,321 ​ 49 ​ 1,212 ​ 7 Consumer ​ 207 ​ 217 ​ ​ ​ ​ 173 ​ ​ ​ Total ​ $ 4,701 ​ $ 5,991 ​ $ 115 ​ $ 4,603 ​ $ 25 ​ ​ 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 table presents the amortized cost of loans and gross chargeoffs by year of origination and by 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 March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving Loans Amortized Cost Basis ​ Total Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 11,531 ​ $ 50,495 ​ $ 46,353 ​ $ 32,496 ​ $ 50,260 ​ $ 89,938 ​ $ 140,615 ​ $ 421,688 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 67 ​ 67 Substandard ​ 15 ​ ​ ​ ​ ​ 46 ​ ​ ​ ​ ​ 53 ​ ​ 276 ​ 7,953 ​ ​ 8,343 Total Commercial ​ 11,546 ​ 50,495 ​ 46,399 ​ 32,496 ​ 50,313 ​ 90,214 ​ 148,635 ​ 430,098 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 1,400 ​ 45,146 ​ 91,776 ​ 11,850 ​ 36 ​ 18,983 ​ 87 ​ 169,278 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Substandard ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Municipal ​ ​ 1,400 ​ 45,146 ​ 91,776 ​ 11,850 ​ 36 ​ 18,983 ​ 87 ​ 169,278 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 55,319 ​ 531,819 ​ 488,524 ​ 151,845 ​ 154,002 ​ 386,268 ​ ​ ​ 1,767,777 Special Mention ​ ​ 1,763 ​ ​ ​ ​ ​ ​ ​ 303 ​ 3,301 ​ ​ ​ 5,367 Substandard ​ ​ 175 ​ ​ ​ 1,637 ​ 165 ​ 628 ​ 7,162 ​ ​ ​ 9,767 Total Commercial real estate ​ ​ 57,257 ​ ​ 531,819 ​ ​ 490,161 ​ ​ 152,010 ​ ​ 154,933 ​ ​ 396,731 ​ ​ ​ ​ ​ 1,782,911 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 5,741 ​ 55,051 ​ 69,011 ​ 28,927 ​ 17,764 ​ 93,343 ​ 72,014 ​ 341,851 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Substandard ​ ​ ​ ​ ​ ​ 17 ​ 214 ​ ​ ​ 377 ​ ​ ​ 608 Total Residential real estate ​ ​ 5,741 ​ 55,051 ​ 69,028 ​ 29,141 ​ 17,764 ​ 93,720 ​ 72,014 ​ 342,459 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 17,548 ​ 39,005 ​ 17,087 ​ 8,127 ​ 5,179 ​ 5,457 ​ 700 ​ 93,103 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Substandard ​ ​ ​ ​ ​ ​ 111 ​ 30 ​ 19 ​ 34 ​ ​ ​ 194 Total Consumer ​ 17,548 ​ 39,005 ​ 17,198 ​ 8,157 ​ 5,198 ​ 5,491 ​ 700 ​ 93,297 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Loans ​ $ 93,492 ​ $ 721,516 ​ $ 714,562 ​ $ 233,654 ​ $ 228,244 ​ $ 605,139 ​ $ 221,436 ​ $ 2,818,043 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross charge-offs ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ ​ ​ $ ​ ​ $ ​ ​ $ ​ ​ $ ​ ​ $ ​ ​ $ 4 ​ $ 4 Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ 1 ​ ​ 35 ​ ​ 17 ​ ​ 10 ​ ​ 8 ​ ​ ​ ​ ​ 71 Total Gross charge-offs ​ $ ​ ​ $ 1 ​ $ 35 ​ $ 17 ​ $ 10 ​ $ 8 ​ $ 4 ​ $ 75 ​ ​ The following table presents the amortized cost of loans by major classification of loans summarized by the aggregate pass rating and the classified ratings of special mention, substandard and doubtful within the Company’s internal risk rating system at December 31, 2022 as disclosed prior to ASU 2016-13: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Pass Mention Substandard Doubtful Total Commercial ​ $ 424,411 ​ $ 7,822 ​ $ 815 ​ $ ​ ​ $ 433,048 ​ Municipal ​ ​ 166,210 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 166,210 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,699,041 ​ 7,509 ​ 3,277 ​ ​ ​ ​ 1,709,827 ​ Residential ​ 329,098 ​ ​ ​ 1,630 ​ ​ ​ ​ 330,728 ​ Consumer ​ 90,020 ​ ​ ​ 283 ​ ​ ​ ​ 90,303 ​ Total ​ $ 2,708,780 ​ $ 15,331 ​ $ 6,005 ​ $ ​ ​ $ 2,730,116 ​ ​ ​ ​ The major classifications of loans by past due status are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and (Dollars in thousands) ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 156 ​ $ ​ ​ $ 14 ​ $ 170 ​ $ 429,928 ​ $ 430,098 ​ $ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 169,278 ​ ​ 169,278 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 92 ​ ​ 616 ​ 245 ​ 953 ​ 1,781,958 ​ 1,782,911 ​ ​ ​ ​ Residential ​ 1,965 ​ ​ 444 ​ ​ 467 ​ 2,876 ​ 339,583 ​ 342,459 ​ ​ 59 ​ Consumer ​ 487 ​ ​ 92 ​ 53 ​ 632 ​ 92,665 ​ 93,297 ​ ​ ​ Total ​ $ 2,700 ​ $ 1,152 ​ $ 779 ​ $ 4,631 ​ $ 2,813,412 ​ $ 2,818,043 ​ $ 59 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and (Dollars in thousands) ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 137 ​ $ 38 ​ $ 86 ​ $ 261 ​ $ 432,787 ​ $ 433,048 ​ $ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 166,210 ​ ​ 166,210 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 102 ​ ​ 2 ​ 334 ​ 438 ​ 1,709,389 ​ 1,709,827 ​ ​ ​ ​ Residential ​ 1,162 ​ 128 ​ 988 ​ 2,278 ​ 328,450 ​ 330,728 ​ ​ 748 ​ Consumer ​ 690 ​ 199 ​ 120 ​ 1,009 ​ 89,294 ​ 90,303 ​ ​ ​ Total ​ $ 2,091 ​ $ 367 ​ $ 1,528 ​ $ 3,986 ​ $ 2,726,130 ​ $ 2,730,116 ​ $ 748 ​ ​ ​ Allowance for Credit Losses on Off Balance Sheet Commitments ​ The following table presents the activity in the ACL on off balance sheet commitments for the three months ended March 31, 2023: ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ March 31, 2023 Balance at December 31, 2022 ​ $ 179 Impact of adopting Topic 326 ​ ​ 270 Credit recorded in noninterest expense ​ ​ (185) Total allowance for credit losses on off balance sheet commitments ​ $ 264 ​ ​ ​ Modifications to Borrowers Experiencing Financial Difficulty ​ The Company adopted Accounting Standards Update (“ASU”) 2022-02, Financial Instruments - Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures (“ASU 2022-02”) effective January 1, 2023. The amendments in ASU 2022-02 eliminated the recognition and measure of troubled debt restructurings and enhanced disclosures for loan modifications to borrowers experiencing financial difficulty. ​ There were no loans made to borrowers experiencing financial difficulty that were modified during the three months ended March 31, 2023 and hence there were no loans made to borrowers experiencing financial difficulty that subsequently defaulted. ​ Information on loan modifications prior to the adoption of ASU 2022-02 on January 1, 2023 is presented in accordance with the applicable accounting standards in effect at that time. During the three months ended March 31, 2022, the Company did not modify any loans that were determined to be a troubled debt restructuring. ​

Other assets

Other assets	3 Months Ended
	Mar. 31, 2023
Other assets
Other assets	6. Other assets: ​ The components of other assets at March 31, 2023 and December 31, 2022 are summarized as follows: ​ Restricted equity securities declined $4.7 million from December 31, 2022 due to lower FHLB stock requirement resulting from a decrease in borrowings. Interest rate swaps balance represents the fair value of our commercial loan back-to-back swaps and is lower due to a decline in market rates from December 31, 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 ​ December 31, 2022 Other real estate owned ​ $ 121 ​ $ 121 ​ Investment in low income housing partnership ​ 5,325 ​ 5,446 ​ Mortgage servicing rights ​ 906 ​ 914 ​ Restricted equity securities (FHLB and other) ​ 4,887 ​ 9,630 ​ Interest rate floor ​ ​ 1 ​ ​ 1 ​ Interest rate swaps ​ ​ 18,485 ​ ​ 21,794 ​ Other assets ​ 11,354 ​ 8,165 ​ Total ​ $ 41,079 ​ $ 46,071 ​ ​

Fair value estimates

Fair value estimates	3 Months Ended
	Mar. 31, 2023
Fair value estimates
Fair value of 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 March 31, 2023 and December 31, 2022 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: ​ Interest rate swaps and options: Derivative contracts create exposure to interest rate movements as well as risks from the potential of non-performance of the counterparty. ​ ​ Assets and liabilities measured at fair value on a recurring basis at March 31, 2023 and December 31, 2022 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs March 31, 2023 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 181,564 $ 181,564 $ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 16,431 ​ ​ ​ ​ ​ 16,431 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 57,204 ​ ​ ​ ​ 57,204 ​ ​ ​ ​ Tax-exempt ​ 68,574 ​ ​ ​ ​ 68,574 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 908 ​ ​ ​ ​ 908 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 89,833 ​ ​ ​ ​ 89,833 ​ ​ ​ ​ Corporate debt securities ​ ​ 3,611 ​ ​ ​ ​ ​ 3,611 ​ ​ ​ ​ Common equity securities ​ ​ 81 ​ ​ 81 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 418,206 ​ $ 181,645 ​ $ 236,561 ​ $ ​ ​ Interest rate floor-other assets ​ $ 1 ​ ​ ​ ​ $ 1 ​ ​ ​ ​ Interest rate swap-other assets ​ $ 18,485 ​ ​ ​ ​ $ 18,485 ​ ​ ​ ​ Interest rate floor-other liabilities ​ ​ (1,980) ​ ​ ​ ​ ​ (1,980) ​ ​ ​ ​ Interest rate swap-other liabilities ​ $ (17,914) ​ ​ ​ ​ $ (17,914) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2022 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 180,297 $ 180,297 $ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 16,370 ​ ​ ​ ​ ​ 16,370 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 55,358 ​ ​ ​ ​ 55,358 ​ ​ ​ ​ Tax-exempt ​ 88,407 ​ ​ ​ ​ 88,407 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 942 ​ ​ ​ ​ 942 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 132,703 ​ ​ ​ ​ 132,703 ​ ​ ​ ​ Corporate debt securities ​ ​ 3,626 ​ ​ ​ ​ ​ 3,626 ​ ​ ​ ​ Common equity securities ​ 110 ​ ​ 110 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 477,813 ​ $ 180,407 ​ $ 297,406 ​ $ ​ ​ Interest rate floor-other assets ​ $ 1 ​ ​ ​ ​ $ 1 ​ ​ ​ ​ Interest rate swap-other assets ​ $ 21,794 ​ ​ ​ ​ $ 21,794 ​ ​ ​ ​ Interest rate swap-other liabilities ​ $ (21,466) ​ ​ ​ ​ $ (21,466) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets and liabilities measured at fair value on a nonrecurring basis at March 31, 2023 and December 31, 2022 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs March 31, 2023 Amount (Level 1) (Level 2) (Level 3) Loans individually evaluated for credit loss $ 1,680 $ ​ $ ​ $ 1,680 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant Other ​ Significant ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2022 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 220 $ ​ $ ​ $ 220 ​ ​ 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 (Dollars in thousands, except percents) ​ Fair Value ​ ​ ​ ​ ​ Range March 31, 2023 Estimate Valuation Techniques Unobservable Input (Weighted Average) Loans individually evaluated for credit loss $ 1,680 Appraisal of collateral Appraisal adjustments 22.8% to 77.0% (67.3)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.2)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands, except percents) ​ Fair Value ​ ​ ​ ​ ​ Range December 31, 2022 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 220 Appraisal of collateral Appraisal adjustments 21.6% to 97.0% (77.7)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (4.9)% ​ ​ 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 March 31, 2023 and December 31, 2022 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 (Dollars in thousands) ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs March 31, 2023 Value Value (Level 1) (Level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 140,583 ​ $ 140,583 ​ $ 140,583 ​ $ ​ ​ $ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 418,125 ​ 418,125 ​ ​ 181,564 ​ ​ 236,561 ​ ​ ​ ​ Common equity securities ​ ​ 81 ​ ​ 81 ​ ​ 81 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 89,705 ​ 77,073 ​ ​ ​ ​ 77,073 ​ ​ ​ ​ Loans held for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ 2,792,599 ​ 2,629,921 ​ ​ ​ ​ ​ ​ ​ ​ 2,629,921 ​ Accrued interest receivable ​ 11,678 ​ 11,678 ​ ​ ​ ​ 11,678 ​ ​ ​ ​ Mortgage servicing rights ​ 906 ​ 1,747 ​ ​ ​ ​ 1,747 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ ​ 4,887 ​ 4,887 ​ ​ ​ ​ 4,887 ​ ​ ​ ​ Interest rate floor ​ ​ 1 ​ ​ 1 ​ ​ ​ ​ ​ 1 ​ ​ ​ ​ Interest rate swaps ​ 18,485 ​ 18,485 ​ ​ ​ ​ 18,485 ​ ​ ​ ​ Total ​ $ 3,477,050 ​ $ 3,302,580 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 3,235,967 ​ $ 3,229,495 ​ $ ​ ​ $ 3,229,495 ​ $ ​ ​ Short-term borrowings ​ ​ 17,280 ​ ​ 17,280 ​ ​ ​ ​ ​ 17,280 ​ ​ ​ ​ Long-term debt ​ 25,000 ​ 24,982 ​ ​ ​ ​ 24,982 ​ ​ ​ ​ Subordinated debentures ​ 33,000 ​ 31,898 ​ ​ ​ ​ 31,898 ​ ​ ​ ​ Accrued interest payable ​ ​ 2,304 ​ 2,304 ​ ​ ​ ​ ​ 2,304 ​ ​ ​ ​ Interest rate floor ​ ​ 1,980 ​ ​ 1,980 ​ ​ ​ ​ ​ 1,980 ​ ​ ​ ​ Interest rate swaps ​ 17,914 ​ 17,914 ​ ​ ​ ​ ​ 17,914 ​ ​ ​ ​ Total ​ $ 3,333,445 ​ $ 3,325,853 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable (Dollars in thousands) ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs December 31, 2022 Value Value (Level 1) (Level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 37,868 ​ $ 37,868 ​ $ 37,868 ​ $ ​ ​ $ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 477,703 ​ 477,703 ​ ​ 180,297 ​ ​ 294,706 ​ ​ ​ ​ Common equity securities ​ ​ 110 ​ ​ 110 ​ ​ 110 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 91,179 ​ 76,563 ​ ​ ​ ​ 76,563 ​ ​ ​ ​ Loans held for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ 2,702,644 ​ 2,562,780 ​ ​ ​ ​ ​ ​ ​ ​ 2,562,780 ​ Accrued interest receivable ​ 11,715 ​ 11,715 ​ ​ ​ ​ 11,715 ​ ​ ​ ​ Mortgage servicing rights ​ 914 ​ 1,762 ​ ​ ​ ​ 1,762 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ 9,630 ​ 9,630 ​ ​ ​ ​ 9,630 ​ ​ ​ ​ Interest rate floor ​ ​ 1 ​ ​ 1 ​ ​ ​ ​ ​ 1 ​ ​ ​ ​ Interest rate swaps ​ ​ 21,794 ​ ​ 21,794 ​ ​ ​ ​ ​ 21,794 ​ ​ ​ ​ Total ​ $ 3,353,558 ​ $ 3,199,926 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 3,046,598 ​ $ 3,035,615 ​ $ ​ ​ $ 3,035,615 ​ $ ​ ​ Short-term borrowings ​ 114,930 ​ 114,743 ​ ​ ​ ​ 114,743 ​ ​ ​ ​ Long-term debt ​ 555 ​ 555 ​ ​ ​ ​ 555 ​ ​ ​ ​ Subordinated debentures ​ ​ 33,000 ​ ​ 53,998 ​ ​ ​ ​ ​ 53,998 ​ ​ ​ ​ Accrued interest payable ​ 903 ​ 903 ​ ​ ​ ​ ​ 903 ​ ​ ​ ​ Interest rate swaps ​ ​ 21,466 ​ ​ 21,466 ​ ​ ​ ​ ​ 21,466 ​ ​ ​ ​ Total ​ $ 3,217,452 ​ $ 3,227,280 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Employee benefit plans

Employee benefit plans	3 Months Ended
	Mar. 31, 2023
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 months ended March 31, salaries and employee benefits expense includes approximately $478 thousand in 2023, and $256 thousand in 2022 relating to the employee benefit plans. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits (Dollars in thousands) ​ 2023 ​ 2022 ​ Net periodic pension income: ​ ​ ​ ​ ​ Interest cost ​ $ 164 ​ $ 114 ​ ​ Expected return on plan assets ​ (293) ​ (352) ​ ​ Amortization of unrecognized net loss ​ 50 ​ 50 ​ ​ Net periodic pension income: ​ $ (79) ​ $ (188) ​ ​ ​ 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 exercisability 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 March 31, 2023, there were 17,364 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 re-grant 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 three months ended March 31, 2023, the Company granted no awards of restricted stock and restricted stock units under the 2017 Plan. For the three months ended March 31, 2022, the Company granted The non-performance restricted stock grants made in 2022, 2021 and 2020 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 criteria. 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 $209 thousand for the three months ended March 31, 2023 for awards granted under the 2017 Plan. The Company recognized compensation expense of $199 thousand for the three months ended March 31, 2022 for awards granted under the 2017 Plan. As of March 31, 2023, the Company had $0.8 million 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 1.5 years.

Derivatives and hedging activit

Derivatives and hedging activities	3 Months Ended
	Mar. 31, 2023
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 existing credit derivatives result from participations of loan participation arrangements, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. ​ 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. Such derivatives have been used to hedge the variable cash flows associated with existing variable-rate assets and issuances of debt. ​ 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 (loss) 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 (loss) 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 $32 thousand will be reclassified as a reduction to interest income. ​ Fair Value Hedges of Interest Rate Risk ​ The Company ​ For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest income. ​ As of March 31, 2023, the following amounts were recorded on the balance sheet related to cumulative basis adjustment for fair value hedges: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Line Item in the Statement of Financial Position in Which the Hedged Item is Included ​ Amortized Amount of the Hedged Assets/(Liabilities) ​ Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) (Dollars in Thousands) ​ 2023 ​ 2022 ​ 2023 ​ 2022 AFS Securities (1) $ 100,000 $ ​ $ 1,986 $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total $ 100,000 $ ​ $ 1,986 $ ​ (1) These amounts include the amortized cost basis of closed portfolios of fixed rate assets used to designate hedging relationships in which the hedged item is the stated amount of assets in the closed portfolio anticipated to be outstanding for the designated hedged period. At March 31, 2023, the amortized cost basis of the closed portfolios used in these hedging relationships was $146.1 million. The amounts of the designated hedged items were $138.6 million. ​ 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 derivatives 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 derivatives associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer derivatives and the offsetting derivatives are recognized directly in earnings. As of March 31, 2023, the Company had ​ The Company’s existing credit derivatives result from participations in or out of interest rate swaps provided by or to external lenders as part of loan participation arrangements, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. Derivatives not designated as hedges are not speculative and result from a service the Company provides to certain lenders which participate in loans. ​ ​ 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 Sheet as of March 31, 2023 and December 31, 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Values of Derivative Instruments ​ ​ Derivative Assets ​ ​ Derivative Liabilities ​ ​ As of March 31, 2023 ​ As of December 31, 2022 ​ ​ As of March 31, 2023 ​ As of December 31, 2022 (Dollars in Thousands) ​ Notional Amount ​ Balance Sheet Location ​ Fair Value ​ Balance Sheet Location ​ Fair Value ​ ​ Notional Amount ​ Balance Sheet Location ​ Fair Value ​ Balance Sheet Location ​ Fair Value Derivatives designated as hedging instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Products $ 25,000 ​ Other Assets $ 1 ​ Other Assets $ 1 ​ $ 100,000 ​ Other Liabilities $ 1,970 ​ Other Liabilities $ ​ Total derivatives designated as hedging instruments ​ ​ ​ ​ $ 1 ​ ​ $ 1 ​ ​ ​ ​ ​ $ 1,970 ​ ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not designated as hedging instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Products $ 208,147 ​ Other Assets $ 18,963 ​ Other Assets $ 22,195 ​ $ 208,147 ​ Other Liabilities $ 18,392 ​ Other Liabilities $ 21,466 Other Contracts ​ 1,522 ​ Other Assets ​ 6 ​ Other Assets ​ ​ ​ ​ 6,307 ​ Other Liabilities ​ 2 ​ Other Liabilities ​ ​ Total derivatives not designated as hedging instruments ​ ​ ​ ​ $ 18,969 ​ ​ $ 22,195 ​ ​ ​ ​ ​ $ 18,394 ​ ​ $ 21,466 (1) Amounts include accrued interest. (2) Notional amount of interest rate floor at December 31, 2022 was $25.0 million. Notional asset amount of interest rate swaps at December 31, 2022 was $187.3 million and $1.5 million for risk participation agreements. ​ 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 March 31, 2023 and March 31, 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Amount of Gain or (Loss) Recognized in OCI on Derivative Amount of Gain or (Loss) Recognized in OCI Included Component Amount of Gain or (Loss) Recognized in OCI Excluded Component Location of Gain or (Loss) Recognized from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Included Component Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component March 31, 2023 2023 ​ ​ ​ 2023 ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ Interest Rate Products $ 1 ​ $ 1 Interest Income ($ 16) ​ $ 16 Total $ 1 ​ $ 1 ​ ($ 16) ​ $ 16 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Amount of Gain or (Loss) Recognized in OCI on Derivative Amount of Gain or (Loss) Recognized in OCI Included Component Amount of Gain or (Loss) Recognized in OCI Excluded Component Location of Gain or (Loss) Recognized from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Included Component Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component March 31, 2022 2022 ​ ​ ​ 2022 ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ Interest Rate Products ($ 361) (439) $ 78 Interest Income $ 131 147 ($ 16) Total ($ 361) ($ 439) $ 78 ​ $ 131 $ 147 ($ 16) ​ * Amounts disclosed are gross and not net of taxes. ​ Effect of Fair Value and Cash Flow Hedge Accounting on the Statements of Income and Comprehensive Income (Loss) ​ The table below presents the effect of the Company’s derivative financial instruments on the consolidated statements of income and comprehensive income (loss) as of March 31, 2023 and March 31, 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) ​ ​ Recognized in Income on Fair Value and ​ ​ Cash Flow Hedging Relationships ​ ​ For the three months ended March 31, ​ ​ ​ 2023 ​ ​ 2022 (Dollars in Thousands) Interest Income Interest Income ​ ​ ​ ​ ​ ​ ​ Total amounts of income and expense line items presented in the ​ ​ ​ ​ ​ ​ statement of financial performance in which the effects of fair value or ​ ​ ​ ​ ​ ​ cash flow hedges are recorded ​ $ 15 ​ $ 131 ​ ​ ​ ​ ​ ​ ​ The effects of fair value and cash flow hedging: ​ ​ ​ ​ ​ ​ Gain or (loss) on fair value hedging relationships ​ ​ ​ ​ ​ ​ Interest contracts ​ ​ ​ ​ ​ ​ Hedged items ​ ​ 1,986 ​ ​ ​ Derivatives designated as hedging instruments ​ ​ (1,955) ​ ​ ​ Gain or (loss) on cash flow hedging relationships ​ ​ ​ ​ ​ ​ Interest contracts ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income ​ ​ (16) ​ ​ 131 Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income - Included Component ​ ​ ​ ​ ​ 147 Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income - Excluded Component ​ $ (16) ​ $ (16) ​ Effect of Derivative Instruments Not Designated as Hedging Instruments on the Statements of Income and Comprehensive Income (Loss) The tables below present the effect of the Company’s derivative financial instruments on the consolidated statements of income and comprehensive income (loss) for the three months ended March 31, 2023 and 2022. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of Gain or (Loss) ​ Amount of Gain or (Loss) ​ ​ ​ ​ Recognized in ​ Recognized in ​ ​ Location of Gain or (Loss) ​ Income on Derivative ​ Income on Derivative ​ ​ Recognized in Income on ​ Three Months Ended ​ Three Months Ended (Dollars in thousands) Derivative March 31, 2023 March 31, 2022 Derivatives Not Designated as Hedging Instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Products Other income / (expense) ​ $ (161) ​ $ 240 ​ Other Contracts ​ Other income / (expense) ​ ​ ​ ​ ​ 2 ​ Total ​ $ (161) ​ $ 242 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fee Income ​ Fee income ​ $ 384 ​ $ 103 ​ ​ Offsetting Derivatives The table below presents a gross presentation, the effects of offsetting, and a net presentation of the Company’s derivatives as of March 31, 2023 and December 31, 2022. 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 March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Posted ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 18,964 ​ $ ​ ​ $ 18,964 ​ $ ​ ​ $ 17,280 ​ $ 1,684 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Liabilities ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Posted* ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 20,365 ​ $ ​ ​ $ 20,365 ​ $ 20,365 ​ $ ​ ​ $ ​ *Cash collateral of $1,710 was paid in March 2023, but not presented in the table above. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Posted ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 22,196 ​ $ ​ ​ $ 22,196 ​ $ ​ ​ $ 14,530 ​ $ 7,666 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Liabilities ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Posted ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 21,466 ​ $ ​ ​ $ 21,466 ​ $ 21,466 ​ $ ​ ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 March 31, 2023, 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 $2.0 million. As of December 31, 2022, 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

Deposits

Deposits	3 Months Ended
	Mar. 31, 2023
Deposits.
Deposits	​ 10. Deposits ​ The major components of interest-bearing and noninterest-bearing deposits at March 31, 2023 and December 31, 2022 are summarized as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 ​ December 31, 2022 Interest-bearing deposits: ​ ​ ​ ​ ​ ​ Money market accounts ​ $ 775,511 ​ $ 685,323 Now accounts ​ 698,888 ​ 772,712 Savings accounts ​ 500,709 ​ 523,931 Time deposits less than $250 ​ 400,327 ​ 199,136 Time deposits $250 or more ​ 114,443 ​ 92,731 Total interest-bearing deposits ​ 2,489,878 ​ 2,273,833 Noninterest-bearing deposits ​ 746,089 ​ 772,765 Total deposits ​ $ 3,235,967 ​ $ 3,046,598 ​ The deposit base consisted of 48.6% retail accounts, 33.2% commercial accounts, 12.5% municipal relationships and 5.7% brokered deposits at March 31, 2023. At March 31, 2023, 76.6% of deposits were fully insured by the FDIC while $757.4 million or 23.4% of total deposits were uninsured by the FDIC. In addition, at March 31, 2023, $292.0 million in letters of credit issued by the FHLB were pledged as collateral for municipal deposits. As an additional resource to our uninsured depositors, we offer all depositors access to IntraFi's CDARS and ICS programs which allows deposit customers to obtain full FDIC deposit insurance while maintaining the deposit relationship with our Bank.

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2023
Borrowings
Borrowings	11. Borrowings ​ Short-term borrowings consist 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. Total short-term borrowings at March 31, 2023 were $17.3 million as compared to $114.9 million at December 31, 2022. Other borrowings, which include cash collateral pledged by derivative counterparties to offset interest rate exposure, represented the entire balance of $17.3 million at March 31, 2023. The overall decrease to total short-term borrowings from December 31, 2022 is due to paying-off the overnight borrowings at the FHLB with proceeds from the sale of investment securities and deposit growth. ​ The table below outlines short-term borrowings at and for the three months ended March 31, 2023 and at and for the year ended December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the three months ended March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End (Dollars in thousands, except percents) Balance Balance Balance the Year of the Period Other borrowings $ 17,280 $ 13,841 $ 17,280 4.57 % 4.83 % FHLB advances ​ ​ ​ ​ ​ 77,689 ​ ​ 158,000 4.86 ​ ​ ​ Total short-term borrowings ​ $ 17,280 ​ $ 91,530 ​ $ 175,280 4.81 % 4.83 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End (Dollars in thousands, except percents) Balance Balance Balance the Year of the Year Other borrowings $ 14,530 $ 10,033 $ 16,100 2.10 % 4.30 % FHLB advances ​ ​ 100,400 ​ ​ 32,647 ​ ​ 125,975 2.73 ​ 4.45 ​ Total short-term borrowings ​ $ 114,930 ​ $ 42,680 ​ $ 142,075 2.58 % 4.43 % ​ 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 March 31, 2023, the maximum borrowing capacity was $1.2 billion of which $25.0 million was outstanding in borrowings and $292.0 million was used to issue standby letters of credit to collateralize public fund deposits. At December 31, 2022, the maximum borrowing capacity was $1.2 billion of which $101.0 million was outstanding in borrowings and $388.8 million 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 March 31, 2023 and December 31, 2022 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ ​ (Dollars in thousands, except percents) Fixed ​ ​ ​ March 31, 2023 ​ ​ December 31, 2022 March 2023 ​ 4.69 % ​ $ ​ ​ $ 555 ​ March 2025 ​ 4.37 ​ ​ ​ 10,000 ​ ​ ​ ​ March 2026 ​ 4.20 ​ ​ ​ 15,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 25,000 ​ $ 555 ​ ​ Maturities of long-term debt, by contractual maturity, for the remainder of 2023 and subsequent years are as follows: ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ ​ ​ 2025 ​ $ 10,000 ​ 2026 ​ 15,000 ​ ​ ​ $ 25,000 ​ ​ The advances from the FHLB totaling $25.0 million are not convertible.

Subordinated debt

Subordinated debt	3 Months Ended
	Mar. 31, 2023
Subordinated debt
Subordinated debt	12. Subordinated debt ​ On June 1, 2020, the Company sold $33.0 million 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. ​

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	3 Months Ended
	Mar. 31, 2023
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 months ended and as of March 31, 2023, 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 credit losses, fair value of financial instruments, the valuation of deferred tax assets, 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, 2022.
Second Quarter Dividend Declaration	Second Quarter Dividend Decl aration ​ On April 28, 2023, the Board of Directors declared a second quarter dividend of $0.41 per share. The dividend is payable on June 15, 2023 to shareholders of record as of May 31, 2023.
Adoption of New Accounting Standard and Recent accounting standards	​ Adoption of New Accounting Standard ​ On January 1, 2023, the Company adopted ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, which replaces the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss (CECL) model. The Company adopted ASU 2016-13 using a modified retrospective approach. Results for reporting periods beginning after January 1, 2023 are presented under Topic 326, while prior period amounts continue to be reported in accordance with previously applicable GAAP. At adoption, the Company decreased its allowance for credit losses by $3.0 million. Upon adoption the Company recorded a cumulative effect adjustment that increased stockholders’ equity by $2.4 million, net of tax. The Company adopted ASU 2022-02, “Financial Instruments - Credit Losses (Topic 326) Troubled Debt Restructurings and Vintage Disclosures” effective January 1, 2023. The ASU addresses and amends areas identified by the FASB as part of its post-implementation review of the accounting standard that introduced the current expected credit losses model. The amendments eliminate the accounting guidance for troubled debt restructurings by creditors that have adopted the current expected credit losses model and enhance the disclosure requirements for loan refinancings and restructurings made with borrowers experiencing financial difficulty. In addition, the amendments require disclosure of current-period gross write-offs for financing receivables and net investment in leases by year of origination in the vintage disclosures. ​ Allowance for Credit Losses ​ The allowance for credit losses represents the estimated amount considered necessary to cover lifetime expected credit losses inherent in financial assets at the balance sheet date. The measurement of expected credit losses is applicable to loans receivable and securities measured at amortized cost. It also applies to off-balance sheet credit exposures such as loan commitments and unused lines of credit. The allowance is established through a provision for credit losses that is charged against income. The methodology for determining the allowance for credit losses is considered a critical accounting policy by management because of the high degree of judgment involved, the subjectivity of the assumptions used, and the potential for changes in the forecasted economic environment that could result in changes to the amount of the recorded allowance for credit losses. The allowance for credit losses is reported separately as a contra-asset on the consolidated balance sheets. The expected credit loss for unfunded lending commitments and unfunded loan commitments is reported on the consolidated balance sheets in other liabilities while the provision for credit losses related to unfunded commitments is reported in other non-interest expense in the consolidated statements of income and comprehensive income (loss). ​ Allowance for Credit Losses on Loans Receivable ​ The allowance for credit losses on loans is deducted from the amortized cost basis of the loan to present the net amount expected to be collected. Expected losses are evaluated and calculated on a collective, or pooled, basis for those loans which share similar risk characteristics. The Company has chosen to segment its portfolio consistent with the manner in which it manages credit risk. Such segments include residential real estate, consumer, commercial and industrial, commercial real estate and municipal. At each reporting period, the Company evaluates whether loans within a pool continue to exhibit similar risk characteristics. If the risk characteristics of a loan change, such that they are no longer similar to other loans in the pool, the Company will evaluate the loan with a different pool of loans that share similar risk characteristics. If the loan does not share risk characteristics with other loans, the Company will evaluate the loan on an individual basis. The Company evaluates the pooling methodology at least annually. Loans are charged off against the allowance for credit losses when the Company believes the balances to be uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged off or expected to be charged off. ​ The Company estimates the allowance for credit losses on loans using an advanced probability of default model which incorporates probability of default, loss given default, exposure at default and probability of attrition attributes. The model considers relevant available information at both the portfolio and loan level from internal data that is supplemented by shared data pool information. The model also incorporates reasonable and supportable economic forecasts. After the reasonable and supportable forecast period, the model reverts to average historical losses. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications. ​ Also included in the allowance for credit losses on loans are qualitative reserves to cover losses that are expected but, in the Company’s assessment, may not be adequately represented in the quantitative analysis described above. Factors that the Company considers include changes in lending policies and procedures, changes in management, changes in the quality of the loan review process, the existence of any concentrations of credit and other external factors. ​ Individually Evaluated Loans ​ On a case-by-case basis, the Company may conclude that a loan should be evaluated on an individual basis based on its disparate risk characteristics. The Bank has determined that any loans currently on non-accrual status or are 90 or more days past due and still accruing are considered impaired and should be individually evaluated for losses. When the Company determines that a loan no longer shares similar risk characteristics with other loans in the portfolio, the allowance will be determined on an individual basis using the present value of expected cash flows or, for collateral-dependent loans, the fair value of the collateral as of the reporting date, less estimated selling costs, as applicable. If the fair value of the collateral is less than the amortized cost basis of the loan, the Company will establish a reserve for the difference between the fair value of the collateral, less costs to sell and carrying costs at the reporting date and the amortized cost basis of the loan. If this amount is deemed uncollectible, the Company will charge-off that amount. ​ Acquired Loans ​ Acquired loans are included in the Company's calculation of the allowance for credit losses. How the allowance on an acquired loan is recorded depends on whether or not it has been classified as a Purchased Credit Deteriorated (“PCD”) loan. PCD loans are loans acquired at a discount that is due, in part, to credit quality. PCD loans are accounted for in accordance with ASC Subtopic 326-20 and are initially recorded at fair value as determined by the sum of the present value of expected future cash flows and an allowance for credit losses at acquisition. The allowance for PCD loans is recorded through a gross-up effect, while the allowance for acquired non-PCD loans is recorded through provision expense, consistent with originated loans. Thus, the determination of which loans are PCD and non-PCD can have a significant impact on the accounting for these loans. Subsequent to acquisition, the allowance for PCD loans will generally follow the same estimation, provision and charge-off process as non-PCD acquired and originated loans. ​ Under FASB ASC Topic 326, a PCD asset is defined as an individual financial asset that as of the date of acquisition has experienced a more than insignificant deterioration in credit quality since origination as determined during the acquisition process. Upon identification of these assets, the amortized cost basis will be adjusted at the time of acquisition to reflect any impairment amount. After acquisition, PCD loans will be either collectively evaluated for reserve requirements or individually evaluated if on nonaccrual status or are 90 or more days past due and still accruing. ​ Allowance for Credit Losses on Off-Balance Sheet Commitments ​ The Company is required to include unfunded commitments that are expected to be funded in the future within the allowance calculation, other than those that are unconditionally cancelable. To arrive at that reserve, the reserve percentage for each applicable segment is applied to the unused portion of the expected commitment balance and is multiplied by the expected funding rate. To determine the expected funding rate, the Company uses a historical utilization rate for each segment. As noted above, the allowance for credit losses on unfunded loan commitments is included in other liabilities on the consolidated balance sheets and the related credit expense is recorded in other non-interest expense in the consolidated statements of income and comprehensive income (loss). ​ Allowance for Credit Losses on Held to Maturity Securities ​ The Company’s portfolio of held to maturity securities consists of municipal bonds and U.S. agency residential mortgage-backed securities which are highly rated by major rating agencies and have a long history of no credit losses. In estimating the net amount expected to be collected for held to maturity securities in an unrealized loss position, a historical loss based method is utilized. ​ Allowance for Credit Losses on Available for Sale Securities ​ For available for sale securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For securities available for sale that do not meet the above criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the extent to which fair value is less than amortized cost, any changes to the rating by a rating agency, and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of tax. The Company elected the practical expedient of zero loss estimates for securities issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major agencies and have a long history of no credit losses. ​ Accrued Interest Receivable ​ The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of loans, available for sale securities, and held to maturity securities. Accrued interest receivable on loans is reported as a component of accrued interest receivable on the Consolidated Balance Sheets, totaled $9.8 million at March 31, 2023 and is excluded from the estimate of credit losses. Accrued interest receivable on available of sale securities and held to maturity securities, also a component of accrued interest receivable on the Consolidated Balance Sheets, totaled $1.6 million and $191 thousand, respectively, at March 31, 2023 and is excluded from the estimate of credit losses. ​ 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, 2022. ​ 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. ​ ASU 2023-01, “Leases (Topic 842) - Common Control Arrangements” (ASU 2023-01) requires entities to determine whether a related party arrangement between entities under common control is a lease. If the arrangement is determined to be a lease, an entity must classify and account for the lease on the same basis as an arrangement with an unrelated party (on the basis of legally enforceable terms and conditions). ASU 2023-01 is effective January 1, 2024 and is not expected to have an impact on our financial statements. ​ ASU 2023-02 “Investments - Equity Method and Join Ventures (Topic 323) - Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method” (ASU 2023-02) permits reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. ASU 2023-02 is effective January 1, 2024 and is not expected to have an impact on our financial statements. ​ ​ ​ ​

Other comprehensive income (l_2

Other comprehensive income (loss) (Tables)	3 Months Ended
	Mar. 31, 2023
Other comprehensive income (loss)
Schedule of components of accumulated other comprehensive loss	​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 ​ December 31, 2022 Net unrealized loss on investment securities available-for-sale ​ $ (55,495) ​ $ (66,250) ​ Income tax benefit ​ (11,950) ​ (14,266) ​ Net of income taxes ​ (43,545) ​ (51,984) ​ Benefit plan adjustments ​ (5,499) ​ (5,499) ​ Income tax benefit ​ (1,184) ​ (1,184) ​ Net of income taxes ​ (4,315) ​ (4,315) ​ Derivative adjustments ​ (2,017) ​ (47) ​ Income tax benefit ​ (434) ​ (10) ​ Net of income taxes ​ (1,583) ​ (37) ​ Accumulated other comprehensive loss ​ $ (49,442) ​ $ (56,336) ​ ​

Earnings per share (Tables)

Earnings per share (Tables)	3 Months Ended
	Mar. 31, 2023
Earnings per share
Schedule of earnings per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2023 ​ 2022 ​ (Dollars in thousands, except percents) ​ Basic ​ Diluted ​ Basic ​ Diluted ​ Net income $ 7,579 $ 7,579 $ 9,630 ​ $ 9,630 Average common shares outstanding ​ 7,157,553 ​ 7,198,970 ​ 7,172,455 ​ 7,216,421 ​ Earnings per share ​ $ 1.06 ​ $ 1.05 ​ $ 1.34 ​ $ 1.33 ​

Investment securities (Tables)

Investment securities (Tables)	3 Months Ended
	Mar. 31, 2023
Investment Securities
Schedule of amortized cost and fair value of investment securities aggregated by investment category	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 197,660 ​ $ ​ ​ $ 16,096 ​ $ 181,564 ​ U.S. government-sponsored enterprises ​ ​ 16,872 ​ ​ ​ ​ ​ 441 ​ ​ 16,431 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 68,426 ​ ​ 5 ​ ​ 11,227 ​ 57,204 ​ Tax-exempt ​ 77,668 ​ 1 ​ ​ 9,095 ​ 68,574 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 942 ​ ​ ​ ​ 34 ​ 908 ​ U.S. government-sponsored enterprises ​ 95,947 ​ ​ ​ 17,735 ​ 78,212 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 12,105 ​ ​ ​ 484 ​ 11,621 ​ Corporate debt securities ​ ​ 4,000 ​ ​ ​ ​ ​ 389 ​ ​ 3,611 ​ Total ​ $ 473,620 ​ $ 6 ​ $ 55,501 ​ $ 418,125 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 11,228 ​ $ 8 ​ $ 674 ​ $ 10,562 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 16,806 ​ ​ ​ ​ 2,541 ​ 14,265 ​ U.S. government-sponsored enterprises ​ 61,671 ​ ​ ​ ​ 9,425 ​ 52,246 ​ Total ​ $ 89,705 ​ $ 8 ​ $ 12,640 ​ $ 77,073 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value Available-for-sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasury securities ​ $ 199,937 ​ $ ​ ​ $ 19,640 ​ $ 180,297 ​ U.S. government-sponsored enterprises ​ ​ 16,955 ​ ​ ​ ​ ​ 585 ​ 16,370 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 68,946 ​ ​ ​ ​ 13,588 ​ 55,358 ​ Tax-exempt ​ 99,774 ​ 93 ​ 11,460 ​ 88,407 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 982 ​ ​ ​ 40 ​ 942 ​ U.S. government-sponsored enterprises ​ 141,231 ​ ​ ​ 20,112 ​ 121,119 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ ​ 12,128 ​ ​ ​ ​ ​ 544 ​ ​ 11,584 ​ Corporate debt securities ​ ​ 4,000 ​ ​ ​ ​ ​ 374 ​ ​ 3,626 ​ Total ​ $ 543,953 ​ $ 93 ​ $ 66,343 ​ $ 477,703 ​ Held-to-maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Tax-exempt state and municipals ​ $ 11,237 ​ $ 1 ​ $ 841 ​ $ 10,397 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ 17,304 ​ ​ ​ ​ 3,016 ​ 14,288 ​ U.S. government-sponsored enterprises ​ 62,638 ​ ​ ​ ​ 10,760 ​ 51,878 ​ Total ​ $ 91,179 ​ $ 1 ​ $ 14,617 ​ $ 76,563 ​ ​
Schedule of fair value and unrealized losses of investment securities in continuous unrealized loss position	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ Less Than 12 Months ​ 12 Months or Greater ​ Total ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ (Dollars in thousands) Loss Position Value Losses Loss Position Value Losses Loss Position Value Losses ​ U.S. Treasury securities ​ ​ ​ $ ​ ​ $ ​ ​ 43 ​ $ 181,564 ​ $ 16,096 ​ 43 ​ $ 181,564 ​ $ 16,096 ​ U.S. government-sponsored enterprises ​ ​ ​ ​ ​ ​ ​ ​ ​ 5 ​ ​ 16,431 ​ ​ 441 ​ 5 ​ ​ 16,431 ​ ​ 441 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 2 ​ ​ 999 ​ ​ 19 ​ 63 ​ ​ 54,709 ​ ​ 11,208 ​ 65 ​ ​ 55,708 ​ ​ 11,227 ​ Tax-exempt ​ 7 ​ ​ 3,095 ​ ​ 29 ​ 98 ​ ​ 70,366 ​ ​ 9,740 ​ 105 ​ ​ 73,461 ​ ​ 9,769 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 2 ​ ​ 818 ​ ​ 31 ​ 7 ​ ​ 14,355 ​ ​ 2,544 ​ 9 ​ ​ 15,173 ​ ​ 2,575 ​ U.S. government-sponsored enterprises ​ 1 ​ ​ 527 ​ ​ 12 ​ 40 ​ ​ 129,931 ​ ​ 27,148 ​ 41 ​ ​ 130,458 ​ 27,160 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 1 ​ 1,926 ​ 86 ​ 3 ​ ​ 9,695 ​ ​ 398 ​ 4 ​ 11,621 ​ 484 ​ Corporate debt securities ​ ​ ​ ​ ​ ​ ​ ​ ​ 6 ​ ​ 3,611 ​ ​ 389 ​ 6 ​ ​ 3,611 ​ ​ 389 ​ Total ​ 13 ​ $ 7,365 ​ $ 177 ​ 265 ​ $ 480,662 ​ $ 67,964 ​ 278 ​ $ 488,027 ​ $ 68,141 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ Less Than 12 Months ​ 12 Months or Greater ​ Total ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ Number of ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ Securities in a ​ Fair ​ Unrealized ​ (Dollars in thousands) Loss Position Value Losses Loss Position Value Losses Loss Position Value Losses ​ U.S. Treasury securities ​ 5 ​ $ 23,700 ​ $ 1,887 ​ 40 ​ $ 156,597 ​ $ 17,753 ​ 45 ​ $ 180,297 ​ $ 19,640 ​ U.S. government-sponsored enterprises ​ 4 ​ ​ 14,104 ​ ​ 197 ​ 1 ​ ​ 2,266 ​ ​ 388 ​ 5 ​ ​ 16,370 ​ ​ 585 ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 21 ​ ​ 19,919 ​ ​ 2,908 ​ 45 ​ ​ 34,464 ​ ​ 10,680 ​ 66 ​ ​ 54,383 ​ ​ 13,588 ​ Tax-exempt ​ 39 ​ 30,973 ​ 1,690 ​ 84 ​ ​ 59,664 ​ 10,611 ​ 123 ​ 90,637 ​ 12,301 ​ Residential mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 5 ​ ​ 904 ​ 39 ​ 4 ​ ​ 14,326 ​ ​ 3,017 ​ 9 ​ 15,230 ​ 3,056 ​ U.S. government-sponsored enterprises ​ 19 ​ 57,166 ​ 2,029 ​ 25 ​ ​ 115,831 ​ ​ 28,843 ​ 44 ​ 172,997 ​ 30,872 ​ Commercial mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 4 ​ ​ 11,584 ​ ​ 544 ​ ​ ​ ​ ​ ​ ​ ​ ​ 4 ​ 11,584 ​ 544 ​ Corporate debt securities ​ 1 ​ 953 ​ 47 ​ 5 ​ ​ 2,673 ​ ​ 327 ​ 6 ​ 3,626 ​ 374 ​ Total ​ 98 ​ $ 159,303 ​ $ 9,341 ​ 204 ​ $ 385,821 ​ $ 71,619 ​ 302 ​ $ 545,124 ​ $ 80,960 ​ ​
Available-for-Sale Securities
Investment Securities
Schedule of maturity distribution of fair value	​ ​ ​ ​ ​ ​ ​ ​ Fair (Dollars in thousands) Value Within one year ​ $ 15,202 ​ After one but within five years ​ 176,975 ​ After five but within ten years ​ 66,629 ​ After ten years ​ 66,319 ​ ​ ​ 325,125 ​ Mortgage-backed and other amortizing securities ​ 93,000 ​ Total ​ $ 418,125 ​ ​
Held-to-maturity Securities.
Investment Securities
Schedule of maturity distribution of fair value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amortized ​ Fair (Dollars in thousands) Cost Value Within one year ​ $ ​ ​ $ ​ ​ After one but within five years ​ ​ ​ ​ ​ ​ ​ After five but within ten years ​ ​ 8,877 ​ ​ 8,355 ​ After ten years ​ ​ 2,351 ​ ​ 2,207 ​ ​ ​ 11,228 ​ 10,562 ​ Mortgage-backed securities ​ 78,477 ​ 66,511 ​ Total ​ $ 89,705 ​ $ 77,073 ​ ​

Loans, net and allowance for _2

Loans, net and allowance for credit losses (Tables)	3 Months Ended
	Mar. 31, 2023
Loans, net and allowance for credit losses
Schedule of major classifications of loans outstanding	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 December 31, 2022 Commercial and Industrial ​ $ 430,098 ​ $ 433,048 ​ Municipal ​ ​ 169,278 ​ ​ 166,210 ​ Total ​ ​ 599,376 ​ ​ 599,258 ​ Real estate ​ ​ ​ ​ ​ ​ ​ Commercial ​ ​ 1,782,911 ​ 1,709,827 ​ Residential ​ ​ 342,459 ​ 330,728 ​ Total ​ ​ 2,125,370 ​ ​ 2,040,555 ​ Consumer ​ ​ ​ ​ ​ ​ ​ Indirect Auto ​ ​ 86,587 ​ ​ 76,461 ​ Consumer Other ​ ​ 6,710 ​ 13,842 ​ Total ​ ​ 93,297 ​ ​ 90,303 ​ Total ​ $ 2,818,043 ​ $ 2,730,116 ​ ​
Schedule of changes in allowance for loan losses account by major classification of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ March 31, 2023 Commercial Municipal Commercial Residential ​ Consumer ​ Total Allowance for credit losses: ​ $ 4,365 ​ $ 1,247 ​ $ 17,915 ​ $ 3,072 ​ $ 873 ​ $ 27,472 ​ Impact of adopting ASU 2016-13 ​ ​ (1,683) ​ ​ 747 ​ ​ (3,344) ​ ​ 987 ​ ​ 30 ​ ​ (3,263) ​ Adjusted Beginning Balance January 1, 2023 ​ ​ 2,682 ​ ​ 1,994 ​ ​ 14,571 ​ ​ 4,059 ​ ​ 903 ​ ​ 24,209 ​ Charge-offs ​ (4) ​ ​ ​ ​ ​ ​ ​ (71) ​ (75) ​ Recoveries ​ ​ ​ ​ ​ 1 ​ 16 ​ 49 ​ 66 ​ Provisions (credits) ​ (197) ​ 324 ​ 1,120 ​ (207) ​ 204 ​ 1,244 ​ Ending balance ​ $ 2,481 ​ $ 2,318 ​ $ 15,692 ​ $ 3,868 ​ $ 1,085 ​ $ 25,444 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ ​ March 31, 2022 Commercial Municipal Commercial Residential ​ Consumer ​ Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Beginning Balance January 1, 2022 ​ $ 7,466 ​ $ 987 ​ $ 15,928 ​ $ 3,209 ​ $ 793 ​ $ 28,383 ​ Charge-offs ​ (161) ​ ​ ​ (132) ​ ​ ​ (62) ​ (355) ​ Recoveries ​ 9 ​ ​ ​ 16 ​ 3 ​ 51 ​ 79 ​ Provisions (credits) ​ (887) ​ 179 ​ 977 ​ 43 ​ (12) ​ 300 ​ Ending balance ​ $ 6,427 $ 1,166 $ 16,789 ​ $ 3,255 ​ $ 770 ​ $ 28,407 ​ ​
Schedule of nonaccrual loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recorded for ​ ​ ​ ​ Total ​ ​ Nonaccrual with ​ ​ Nonaccrual with ​ ​ Nonaccrual Loans ​ ​ ​ ​ Nonaccrual ​ ​ an Allowance for ​ ​ no Allowance for ​ ​ in the three months ​ (Dollars in thousands) ​ Loans ​ ​ Credit Losses ​ ​ Credit Losses ​ ​ ended March 31, 2023 Commercial ​ $ 14 ​ $ 14 ​ $ ​ ​ $ 5 ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 867 ​ ​ ​ 867 ​ 374 ​ Residential ​ 723 ​ ​ ​ 723 ​ ​ ​ Consumer ​ 194 ​ ​ ​ 194 ​ ​ ​ Total ​ $ 1,798 ​ $ 14 ​ $ 1,784 ​ $ 379 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Income ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recorded for ​ ​ ​ ​ Total ​ ​ Nonaccrual with ​ ​ Nonaccrual with ​ ​ Nonaccrual Loans ​ ​ ​ ​ Nonaccrual ​ ​ an Allowance for ​ ​ no Allowance for ​ ​ in the three months ​ (Dollars in thousands) ​ Loans ​ ​ Credit Losses ​ ​ Credit Losses ​ ​ ended December 31, 2022 Commercial ​ $ 86 ​ $ 19 ​ $ 67 ​ $ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,155 ​ ​ ​ 1,155 ​ ​ ​ Residential ​ 562 ​ ​ ​ 562 ​ ​ ​ Consumer ​ 232 ​ ​ ​ 232 ​ ​ ​ Total ​ $ 2,035 ​ $ 19 ​ $ 2,016 ​ $ ​ ​
Summarized information concerning impaired loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the Quarter Ended ​ ​ ​ ​ ​ Unpaid ​ ​ ​ ​ Average ​ Interest ​ ​ Recorded ​ Principal ​ Related ​ Recorded ​ Income (Dollars in thousands) Investment Balance Allowance Investment Recognized With no related allowance: ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ 138 ​ $ 475 ​ $ ​ ​ $ 148 ​ $ 2 Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 2,748 ​ 3,505 ​ ​ ​ ​ 2,562 ​ ​ 12 Residential ​ 874 ​ 1,047 ​ ​ ​ ​ 874 ​ ​ 4 Consumer ​ 207 ​ 217 ​ ​ ​ ​ 173 ​ ​ ​ Total ​ 3,967 ​ 5,244 ​ ​ ​ ​ 3,757 ​ ​ 18 With an allowance recorded: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 21 ​ 21 ​ ​ 21 ​ 31 ​ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 440 ​ 452 ​ 45 ​ 477 ​ 4 Residential ​ 273 ​ 274 ​ 49 ​ 338 ​ 3 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total ​ 734 ​ 747 ​ 115 ​ 846 ​ 7 Total impaired loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 159 ​ 496 ​ 21 ​ 179 ​ 2 Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 3,188 ​ 3,957 ​ 45 ​ 3,039 ​ 16 Residential ​ 1,147 ​ 1,321 ​ 49 ​ 1,212 ​ 7 Consumer ​ 207 ​ 217 ​ ​ ​ ​ 173 ​ ​ ​ Total ​ $ 4,701 ​ $ 5,991 ​ $ 115 ​ $ 4,603 ​ $ 25 ​
Schedule of major classification of loans portfolio summarized by credit quality	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving Loans Amortized Cost Basis ​ Total Commercial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 11,531 ​ $ 50,495 ​ $ 46,353 ​ $ 32,496 ​ $ 50,260 ​ $ 89,938 ​ $ 140,615 ​ $ 421,688 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 67 ​ 67 Substandard ​ 15 ​ ​ ​ ​ ​ 46 ​ ​ ​ ​ ​ 53 ​ ​ 276 ​ 7,953 ​ ​ 8,343 Total Commercial ​ 11,546 ​ 50,495 ​ 46,399 ​ 32,496 ​ 50,313 ​ 90,214 ​ 148,635 ​ 430,098 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 1,400 ​ 45,146 ​ 91,776 ​ 11,850 ​ 36 ​ 18,983 ​ 87 ​ 169,278 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Substandard ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Municipal ​ ​ 1,400 ​ 45,146 ​ 91,776 ​ 11,850 ​ 36 ​ 18,983 ​ 87 ​ 169,278 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 55,319 ​ 531,819 ​ 488,524 ​ 151,845 ​ 154,002 ​ 386,268 ​ ​ ​ 1,767,777 Special Mention ​ ​ 1,763 ​ ​ ​ ​ ​ ​ ​ 303 ​ 3,301 ​ ​ ​ 5,367 Substandard ​ ​ 175 ​ ​ ​ 1,637 ​ 165 ​ 628 ​ 7,162 ​ ​ ​ 9,767 Total Commercial real estate ​ ​ 57,257 ​ ​ 531,819 ​ ​ 490,161 ​ ​ 152,010 ​ ​ 154,933 ​ ​ 396,731 ​ ​ ​ ​ ​ 1,782,911 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 5,741 ​ 55,051 ​ 69,011 ​ 28,927 ​ 17,764 ​ 93,343 ​ 72,014 ​ 341,851 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Substandard ​ ​ ​ ​ ​ ​ 17 ​ 214 ​ ​ ​ 377 ​ ​ ​ 608 Total Residential real estate ​ ​ 5,741 ​ 55,051 ​ 69,028 ​ 29,141 ​ 17,764 ​ 93,720 ​ 72,014 ​ 342,459 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ ​ 17,548 ​ 39,005 ​ 17,087 ​ 8,127 ​ 5,179 ​ 5,457 ​ 700 ​ 93,103 Special Mention ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Substandard ​ ​ ​ ​ ​ ​ 111 ​ 30 ​ 19 ​ 34 ​ ​ ​ 194 Total Consumer ​ 17,548 ​ 39,005 ​ 17,198 ​ 8,157 ​ 5,198 ​ 5,491 ​ 700 ​ 93,297 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Loans ​ $ 93,492 ​ $ 721,516 ​ $ 714,562 ​ $ 233,654 ​ $ 228,244 ​ $ 605,139 ​ $ 221,436 ​ $ 2,818,043 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross charge-offs ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ $ ​ ​ $ ​ ​ $ ​ ​ $ ​ ​ $ ​ ​ $ ​ ​ $ 4 ​ $ 4 Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ 1 ​ ​ 35 ​ ​ 17 ​ ​ 10 ​ ​ 8 ​ ​ ​ ​ ​ 71 Total Gross charge-offs ​ $ ​ ​ $ 1 ​ $ 35 ​ $ 17 ​ $ 10 ​ $ 8 ​ $ 4 ​ $ 75 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ ​ Special ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) Pass Mention Substandard Doubtful Total Commercial ​ $ 424,411 ​ $ 7,822 ​ $ 815 ​ $ ​ ​ $ 433,048 ​ Municipal ​ ​ 166,210 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 166,210 ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 1,699,041 ​ 7,509 ​ 3,277 ​ ​ ​ ​ 1,709,827 ​ Residential ​ 329,098 ​ ​ ​ 1,630 ​ ​ ​ ​ 330,728 ​ Consumer ​ 90,020 ​ ​ ​ 283 ​ ​ ​ ​ 90,303 ​ Total ​ $ 2,708,780 ​ $ 15,331 ​ $ 6,005 ​ $ ​ ​ $ 2,730,116 ​ ​
Schedule of information concerning nonaccrual loans by major loan classification	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ March 31, 2023 Commercial Municipal Commercial Residential Consumer Total Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 2,481 ​ $ 2,318 ​ $ 15,692 $ 3,868 ​ $ 1,085 ​ $ 25,444 Ending balance: individually evaluated 14 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14 Ending balance: collectively evaluated $ 2,467 ​ $ 2,318 ​ $ 15,692 ​ $ 3,868 ​ $ 1,085 ​ $ 25,430 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 430,098 ​ $ 169,278 ​ $ 1,782,911 $ 342,459 ​ $ 93,297 ​ $ 2,818,043 Individually evaluated - collateral dependent - real estate ​ 10 ​ ​ ​ ​ 867 ​ ​ 789 ​ ​ ​ ​ 1,666 Individually evaluated - collateral dependent - non-real estate ​ ​ 14 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14 ​ Collectively evaluated ​ ​ 430,074 ​ ​ 169,278 ​ ​ 1,782,044 ​ ​ 341,670 ​ ​ 93,297 ​ ​ 2,816,363 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Real estate ​ ​ ​ ​ ​ ​ December 31, 2022 Commercial Municipal Commercial Residential Consumer Total Allowance for loan losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 4,365 ​ $ 1,247 ​ $ 17,915 $ 3,072 ​ $ 873 ​ $ 27,472 Ending balance: individually evaluated for impairment 19 ​ ​ ​ ​ ​ ​ ​ 21 ​ ​ ​ ​ 40 Ending balance: collectively evaluated for impairment $ 4,346 ​ $ 1,247 ​ $ 17,915 ​ $ 3,051 ​ $ 873 ​ $ 27,432 Loans receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Ending balance ​ $ 433,048 ​ $ 166,210 ​ $ 1,709,827 $ 330,728 ​ $ 90,303 ​ $ 2,730,116 Ending balance: individually evaluated for impairment ​ 98 ​ ​ ​ ​ 2,063 ​ ​ 1,760 ​ ​ ​ ​ 3,921 Ending balance: collectively evaluated for impairment ​ ​ 432,950 ​ ​ 166,210 ​ ​ 1,707,764 ​ ​ 328,968 ​ ​ 90,303 ​ ​ 2,726,195 ​
Schedule of major classifications of loans by past due status	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and (Dollars in thousands) ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 156 ​ $ ​ ​ $ 14 ​ $ 170 ​ $ 429,928 ​ $ 430,098 ​ $ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 169,278 ​ ​ 169,278 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 92 ​ ​ 616 ​ 245 ​ 953 ​ 1,781,958 ​ 1,782,911 ​ ​ ​ ​ Residential ​ 1,965 ​ ​ 444 ​ ​ 467 ​ 2,876 ​ 339,583 ​ 342,459 ​ ​ 59 ​ Consumer ​ 487 ​ ​ 92 ​ 53 ​ 632 ​ 92,665 ​ 93,297 ​ ​ ​ Total ​ $ 2,700 ​ $ 1,152 ​ $ 779 ​ $ 4,631 ​ $ 2,813,412 ​ $ 2,818,043 ​ $ 59 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 ​ ​ ​ ​ ​ Greater ​ ​ ​ ​ ​ ​ Loans > 90 ​ ​ 30-59 Days ​ 60-89 Days ​ than 90 ​ Total Past ​ ​ ​ ​ ​ ​ ​ Days and (Dollars in thousands) ​ Past Due ​ Past Due ​ Days ​ Due ​ Current ​ Total Loans ​ Accruing Commercial ​ $ 137 ​ $ 38 ​ $ 86 ​ $ 261 ​ $ 432,787 ​ $ 433,048 ​ $ ​ ​ Municipal ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 166,210 ​ ​ 166,210 ​ ​ ​ ​ Real estate: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial ​ 102 ​ ​ 2 ​ 334 ​ 438 ​ 1,709,389 ​ 1,709,827 ​ ​ ​ ​ Residential ​ 1,162 ​ 128 ​ 988 ​ 2,278 ​ 328,450 ​ 330,728 ​ ​ 748 ​ Consumer ​ 690 ​ 199 ​ 120 ​ 1,009 ​ 89,294 ​ 90,303 ​ ​ ​ Total ​ $ 2,091 ​ $ 367 ​ $ 1,528 ​ $ 3,986 ​ $ 2,726,130 ​ $ 2,730,116 ​ $ 748 ​ ​
Schedule of allowance for credit losses on off balance sheet commitments	​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ March 31, 2023 Balance at December 31, 2022 ​ $ 179 Impact of adopting Topic 326 ​ ​ 270 Credit recorded in noninterest expense ​ ​ (185) Total allowance for credit losses on off balance sheet commitments ​ $ 264 ​

Other assets (Tables)

Other assets (Tables)	3 Months Ended
	Mar. 31, 2023
Other assets
Schedule of components of other assets	​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 ​ December 31, 2022 Other real estate owned ​ $ 121 ​ $ 121 ​ Investment in low income housing partnership ​ 5,325 ​ 5,446 ​ Mortgage servicing rights ​ 906 ​ 914 ​ Restricted equity securities (FHLB and other) ​ 4,887 ​ 9,630 ​ Interest rate floor ​ ​ 1 ​ ​ 1 ​ Interest rate swaps ​ ​ 18,485 ​ ​ 21,794 ​ Other assets ​ 11,354 ​ 8,165 ​ Total ​ $ 41,079 ​ $ 46,071 ​

Fair value estimates (Tables)

Fair value estimates (Tables)	3 Months Ended
	Mar. 31, 2023
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 (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs March 31, 2023 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 181,564 $ 181,564 $ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 16,431 ​ ​ ​ ​ ​ 16,431 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 57,204 ​ ​ ​ ​ 57,204 ​ ​ ​ ​ Tax-exempt ​ 68,574 ​ ​ ​ ​ 68,574 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 908 ​ ​ ​ ​ 908 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 89,833 ​ ​ ​ ​ 89,833 ​ ​ ​ ​ Corporate debt securities ​ ​ 3,611 ​ ​ ​ ​ ​ 3,611 ​ ​ ​ ​ Common equity securities ​ ​ 81 ​ ​ 81 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 418,206 ​ $ 181,645 ​ $ 236,561 ​ $ ​ ​ Interest rate floor-other assets ​ $ 1 ​ ​ ​ ​ $ 1 ​ ​ ​ ​ Interest rate swap-other assets ​ $ 18,485 ​ ​ ​ ​ $ 18,485 ​ ​ ​ ​ Interest rate floor-other liabilities ​ ​ (1,980) ​ ​ ​ ​ ​ (1,980) ​ ​ ​ ​ Interest rate swap-other liabilities ​ $ (17,914) ​ ​ ​ ​ $ (17,914) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant ​ Significant ​ ​ ​ ​ Active Markets for ​ Other Observable ​ Unobservable (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2022 Amount (Level 1) (Level 2) (Level 3) U.S. Treasury securities $ 180,297 $ 180,297 $ ​ $ ​ ​ U.S. government-sponsored enterprises ​ ​ 16,370 ​ ​ ​ ​ ​ 16,370 ​ ​ ​ ​ State and municipals: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Taxable ​ 55,358 ​ ​ ​ ​ 55,358 ​ ​ ​ ​ Tax-exempt ​ 88,407 ​ ​ ​ ​ 88,407 ​ ​ ​ ​ Mortgage-backed securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. government agencies ​ 942 ​ ​ ​ ​ 942 ​ ​ ​ ​ U.S. government-sponsored enterprises ​ 132,703 ​ ​ ​ ​ 132,703 ​ ​ ​ ​ Corporate debt securities ​ ​ 3,626 ​ ​ ​ ​ ​ 3,626 ​ ​ ​ ​ Common equity securities ​ 110 ​ ​ 110 ​ ​ ​ ​ ​ ​ ​ Total investment securities ​ $ 477,813 ​ $ 180,407 ​ $ 297,406 ​ $ ​ ​ Interest rate floor-other assets ​ $ 1 ​ ​ ​ ​ $ 1 ​ ​ ​ ​ Interest rate swap-other assets ​ $ 21,794 ​ ​ ​ ​ $ 21,794 ​ ​ ​ ​ Interest rate swap-other liabilities ​ $ (21,466) ​ ​ ​ ​ $ (21,466) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
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 (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs March 31, 2023 Amount (Level 1) (Level 2) (Level 3) Loans individually evaluated for credit loss $ 1,680 $ ​ $ ​ $ 1,680 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Measurement Using ​ ​ ​ ​ ​ Quoted Prices in ​ Significant Other ​ Significant ​ ​ ​ ​ Active Markets for ​ Observable ​ Unobservable (Dollars in thousands) ​ ​ ​ Identical Assets ​ Inputs ​ Inputs December 31, 2022 Amount (Level 1) (Level 2) (Level 3) Impaired loans $ 220 $ ​ $ ​ $ 220 ​ ​
Schedule of additional quantitative information about assets measured at fair value on a nonrecurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands, except percents) ​ Fair Value ​ ​ ​ ​ ​ Range March 31, 2023 Estimate Valuation Techniques Unobservable Input (Weighted Average) Loans individually evaluated for credit loss $ 1,680 Appraisal of collateral Appraisal adjustments 22.8% to 77.0% (67.3)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (5.2)% ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative Information about Level 3 Fair Value Measurements (Dollars in thousands, except percents) ​ Fair Value ​ ​ ​ ​ ​ Range December 31, 2022 Estimate Valuation Techniques Unobservable Input (Weighted Average) Impaired loans $ 220 Appraisal of collateral Appraisal adjustments 21.6% to 97.0% (77.7)% ​ ​ ​ ​ ​ ​ ​ Liquidation expenses 3.0% to 6.0% (4.9)% ​ ​
Schedule of carrying and fair values of financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable (Dollars in thousands) ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs March 31, 2023 Value Value (Level 1) (Level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 140,583 ​ $ 140,583 ​ $ 140,583 ​ $ ​ ​ $ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 418,125 ​ 418,125 ​ ​ 181,564 ​ ​ 236,561 ​ ​ ​ ​ Common equity securities ​ ​ 81 ​ ​ 81 ​ ​ 81 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 89,705 ​ 77,073 ​ ​ ​ ​ 77,073 ​ ​ ​ ​ Loans held for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ 2,792,599 ​ 2,629,921 ​ ​ ​ ​ ​ ​ ​ ​ 2,629,921 ​ Accrued interest receivable ​ 11,678 ​ 11,678 ​ ​ ​ ​ 11,678 ​ ​ ​ ​ Mortgage servicing rights ​ 906 ​ 1,747 ​ ​ ​ ​ 1,747 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ ​ 4,887 ​ 4,887 ​ ​ ​ ​ 4,887 ​ ​ ​ ​ Interest rate floor ​ ​ 1 ​ ​ 1 ​ ​ ​ ​ ​ 1 ​ ​ ​ ​ Interest rate swaps ​ 18,485 ​ 18,485 ​ ​ ​ ​ 18,485 ​ ​ ​ ​ Total ​ $ 3,477,050 ​ $ 3,302,580 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 3,235,967 ​ $ 3,229,495 ​ $ ​ ​ $ 3,229,495 ​ $ ​ ​ Short-term borrowings ​ ​ 17,280 ​ ​ 17,280 ​ ​ ​ ​ ​ 17,280 ​ ​ ​ ​ Long-term debt ​ 25,000 ​ 24,982 ​ ​ ​ ​ 24,982 ​ ​ ​ ​ Subordinated debentures ​ 33,000 ​ 31,898 ​ ​ ​ ​ 31,898 ​ ​ ​ ​ Accrued interest payable ​ ​ 2,304 ​ 2,304 ​ ​ ​ ​ ​ 2,304 ​ ​ ​ ​ Interest rate floor ​ ​ 1,980 ​ ​ 1,980 ​ ​ ​ ​ ​ 1,980 ​ ​ ​ ​ Interest rate swaps ​ 17,914 ​ 17,914 ​ ​ ​ ​ ​ 17,914 ​ ​ ​ ​ Total ​ $ 3,333,445 ​ $ 3,325,853 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Value Hierarchy ​ ​ ​ ​ ​ ​ ​ ​ Quoted ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Markets for ​ Other ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Identical ​ Observable ​ Unobservable (Dollars in thousands) ​ Carrying ​ Fair ​ Assets ​ Inputs ​ Inputs December 31, 2022 Value Value (Level 1) (Level 2) (Level 3) Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and due from banks ​ $ 37,868 ​ $ 37,868 ​ $ 37,868 ​ $ ​ ​ $ ​ ​ Investment securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Available-for-sale ​ 477,703 ​ 477,703 ​ ​ 180,297 ​ ​ 294,706 ​ ​ ​ ​ Common equity securities ​ ​ 110 ​ ​ 110 ​ ​ 110 ​ ​ ​ ​ ​ ​ ​ Held-to-maturity ​ 91,179 ​ 76,563 ​ ​ ​ ​ 76,563 ​ ​ ​ ​ Loans held for sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net loans ​ 2,702,644 ​ 2,562,780 ​ ​ ​ ​ ​ ​ ​ ​ 2,562,780 ​ Accrued interest receivable ​ 11,715 ​ 11,715 ​ ​ ​ ​ 11,715 ​ ​ ​ ​ Mortgage servicing rights ​ 914 ​ 1,762 ​ ​ ​ ​ 1,762 ​ ​ ​ ​ Restricted equity securities (FHLB and other) ​ 9,630 ​ 9,630 ​ ​ ​ ​ 9,630 ​ ​ ​ ​ Interest rate floor ​ ​ 1 ​ ​ 1 ​ ​ ​ ​ ​ 1 ​ ​ ​ ​ Interest rate swaps ​ ​ 21,794 ​ ​ 21,794 ​ ​ ​ ​ ​ 21,794 ​ ​ ​ ​ Total ​ $ 3,353,558 ​ $ 3,199,926 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ $ 3,046,598 ​ $ 3,035,615 ​ $ ​ ​ $ 3,035,615 ​ $ ​ ​ Short-term borrowings ​ 114,930 ​ 114,743 ​ ​ ​ ​ 114,743 ​ ​ ​ ​ Long-term debt ​ 555 ​ 555 ​ ​ ​ ​ 555 ​ ​ ​ ​ Subordinated debentures ​ ​ 33,000 ​ ​ 53,998 ​ ​ ​ ​ ​ 53,998 ​ ​ ​ ​ Accrued interest payable ​ 903 ​ 903 ​ ​ ​ ​ ​ 903 ​ ​ ​ ​ Interest rate swaps ​ ​ 21,466 ​ ​ 21,466 ​ ​ ​ ​ ​ 21,466 ​ ​ ​ ​ Total ​ $ 3,217,452 ​ $ 3,227,280 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Employee benefit plans (Tables)

Employee benefit plans (Tables)	3 Months Ended
	Mar. 31, 2023
Employee benefit plans
Schedule of components of net periodic benefit cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension Benefits (Dollars in thousands) ​ 2023 ​ 2022 ​ Net periodic pension income: ​ ​ ​ ​ ​ Interest cost ​ $ 164 ​ $ 114 ​ ​ Expected return on plan assets ​ (293) ​ (352) ​ ​ Amortization of unrecognized net loss ​ 50 ​ 50 ​ ​ Net periodic pension income: ​ $ (79) ​ $ (188) ​ ​ ​

Derivatives and hedging activ_2

Derivatives and hedging activities (Tables)	3 Months Ended
	Mar. 31, 2023
Derivatives and hedging activities
Schedule of amounts were recorded on the balance sheet related to cumulative basis adjustment for fair value hedges	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Line Item in the Statement of Financial Position in Which the Hedged Item is Included ​ Amortized Amount of the Hedged Assets/(Liabilities) ​ Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) (Dollars in Thousands) ​ 2023 ​ 2022 ​ 2023 ​ 2022 AFS Securities (1) $ 100,000 $ ​ $ 1,986 $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total $ 100,000 $ ​ $ 1,986 $ ​ (1) These amounts include the amortized cost basis of closed portfolios of fixed rate assets used to designate hedging relationships in which the hedged item is the stated amount of assets in the closed portfolio anticipated to be outstanding for the designated hedged period. At March 31, 2023, the amortized cost basis of the closed portfolios used in these hedging relationships was $146.1 million. The amounts of the designated hedged items were $138.6 million. ​
Schedule of fair value of derivative financial instruments and balance sheet classification	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair Values of Derivative Instruments ​ ​ Derivative Assets ​ ​ Derivative Liabilities ​ ​ As of March 31, 2023 ​ As of December 31, 2022 ​ ​ As of March 31, 2023 ​ As of December 31, 2022 (Dollars in Thousands) ​ Notional Amount ​ Balance Sheet Location ​ Fair Value ​ Balance Sheet Location ​ Fair Value ​ ​ Notional Amount ​ Balance Sheet Location ​ Fair Value ​ Balance Sheet Location ​ Fair Value Derivatives designated as hedging instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Products $ 25,000 ​ Other Assets $ 1 ​ Other Assets $ 1 ​ $ 100,000 ​ Other Liabilities $ 1,970 ​ Other Liabilities $ ​ Total derivatives designated as hedging instruments ​ ​ ​ ​ $ 1 ​ ​ $ 1 ​ ​ ​ ​ ​ $ 1,970 ​ ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives not designated as hedging instruments ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Products $ 208,147 ​ Other Assets $ 18,963 ​ Other Assets $ 22,195 ​ $ 208,147 ​ Other Liabilities $ 18,392 ​ Other Liabilities $ 21,466 Other Contracts ​ 1,522 ​ Other Assets ​ 6 ​ Other Assets ​ ​ ​ ​ 6,307 ​ Other Liabilities ​ 2 ​ Other Liabilities ​ ​ Total derivatives not designated as hedging instruments ​ ​ ​ ​ $ 18,969 ​ ​ $ 22,195 ​ ​ ​ ​ ​ $ 18,394 ​ ​ $ 21,466 (1) Amounts include accrued interest. (2) Notional amount of interest rate floor at December 31, 2022 was $25.0 million. Notional asset amount of interest rate swaps at December 31, 2022 was $187.3 million and $1.5 million for risk participation agreements. ​
Schedule of effect of fair value and cash flow hedge accounting on accumulated other comprehensive income	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Amount of Gain or (Loss) Recognized in OCI on Derivative Amount of Gain or (Loss) Recognized in OCI Included Component Amount of Gain or (Loss) Recognized in OCI Excluded Component Location of Gain or (Loss) Recognized from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Included Component Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component March 31, 2023 2023 ​ ​ ​ 2023 ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ Interest Rate Products $ 1 ​ $ 1 Interest Income ($ 16) ​ $ 16 Total $ 1 ​ $ 1 ​ ($ 16) ​ $ 16 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in Thousands) Amount of Gain or (Loss) Recognized in OCI on Derivative Amount of Gain or (Loss) Recognized in OCI Included Component Amount of Gain or (Loss) Recognized in OCI Excluded Component Location of Gain or (Loss) Recognized from Accumulated Other Comprehensive Income into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Included Component Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component March 31, 2022 2022 ​ ​ ​ 2022 ​ ​ Derivatives in Cash Flow Hedging Relationships ​ ​ ​ ​ ​ ​ ​ Interest Rate Products ($ 361) (439) $ 78 Interest Income $ 131 147 ($ 16) Total ($ 361) ($ 439) $ 78 ​ $ 131 $ 147 ($ 16) ​ * Amounts disclosed are gross and not net of taxes. ​
Schedule of effect of derivative financial instruments on Income Statement	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Location and Amount of Gain or (Loss) ​ ​ Recognized in Income on Fair Value and ​ ​ Cash Flow Hedging Relationships ​ ​ For the three months ended March 31, ​ ​ ​ 2023 ​ ​ 2022 (Dollars in Thousands) Interest Income Interest Income ​ ​ ​ ​ ​ ​ ​ Total amounts of income and expense line items presented in the ​ ​ ​ ​ ​ ​ statement of financial performance in which the effects of fair value or ​ ​ ​ ​ ​ ​ cash flow hedges are recorded ​ $ 15 ​ $ 131 ​ ​ ​ ​ ​ ​ ​ The effects of fair value and cash flow hedging: ​ ​ ​ ​ ​ ​ Gain or (loss) on fair value hedging relationships ​ ​ ​ ​ ​ ​ Interest contracts ​ ​ ​ ​ ​ ​ Hedged items ​ ​ 1,986 ​ ​ ​ Derivatives designated as hedging instruments ​ ​ (1,955) ​ ​ ​ Gain or (loss) on cash flow hedging relationships ​ ​ ​ ​ ​ ​ Interest contracts ​ ​ ​ ​ ​ ​ Amount of gain or (loss) reclassified from accumulated other comprehensive income into income ​ ​ (16) ​ ​ 131 Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income - Included Component ​ ​ ​ ​ ​ 147 Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income - Excluded Component ​ $ (16) ​ $ (16) ​
Schedule of gain (loss) on derivative instruments not designated as hedging instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount of Gain or (Loss) ​ Amount of Gain or (Loss) ​ ​ ​ ​ Recognized in ​ Recognized in ​ ​ Location of Gain or (Loss) ​ Income on Derivative ​ Income on Derivative ​ ​ Recognized in Income on ​ Three Months Ended ​ Three Months Ended (Dollars in thousands) Derivative March 31, 2023 March 31, 2022 Derivatives Not Designated as Hedging Instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate Products Other income / (expense) ​ $ (161) ​ $ 240 ​ Other Contracts ​ Other income / (expense) ​ ​ ​ ​ ​ 2 ​ Total ​ $ (161) ​ $ 242 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fee Income ​ Fee income ​ $ 384 ​ $ 103 ​ ​
Schedule of offsetting derivatives	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Posted ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 18,964 ​ $ ​ ​ $ 18,964 ​ $ ​ ​ $ 17,280 ​ $ 1,684 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Liabilities ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Posted* ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 20,365 ​ $ ​ ​ $ 20,365 ​ $ 20,365 ​ $ ​ ​ $ ​ *Cash collateral of $1,710 was paid in March 2023, but not presented in the table above. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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 ​ Posted ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 22,196 ​ $ ​ ​ $ 22,196 ​ $ ​ ​ $ 14,530 ​ $ 7,666 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Offsetting of Derivative Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ as of December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Amounts Not Offset in the Balance Sheet ​ ​ ​ ​ Gross ​ ​ ​ Net Amounts ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amounts of ​ Gross Amounts ​ of Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Recognized ​ Offset in the ​ presented in the ​ Financial ​ Cash Collateral ​ Net ​ ​ Liabilities ​ Balance Sheet ​ Balance Sheet ​ Instruments ​ Posted ​ Amount ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivatives ​ $ 21,466 ​ $ ​ ​ $ 21,466 ​ $ 21,466 ​ $ ​ ​ $ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2023
Deposits.
Summary of major components of interest-bearing and noninterest-bearing deposits	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 31, 2023 ​ December 31, 2022 Interest-bearing deposits: ​ ​ ​ ​ ​ ​ Money market accounts ​ $ 775,511 ​ $ 685,323 Now accounts ​ 698,888 ​ 772,712 Savings accounts ​ 500,709 ​ 523,931 Time deposits less than $250 ​ 400,327 ​ 199,136 Time deposits $250 or more ​ 114,443 ​ 92,731 Total interest-bearing deposits ​ 2,489,878 ​ 2,273,833 Noninterest-bearing deposits ​ 746,089 ​ 772,765 Total deposits ​ $ 3,235,967 ​ $ 3,046,598

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2023
Borrowings
Summary of short-term borrowings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the three months ended March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End (Dollars in thousands, except percents) Balance Balance Balance the Year of the Period Other borrowings $ 17,280 $ 13,841 $ 17,280 4.57 % 4.83 % FHLB advances ​ ​ ​ ​ ​ 77,689 ​ ​ 158,000 4.86 ​ ​ ​ Total short-term borrowings ​ $ 17,280 ​ $ 91,530 ​ $ 175,280 4.81 % 4.83 % ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ At and for the year ended December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ ​ ​ ​ Maximum ​ Average ​ Average ​ ​ Ending ​ Average ​ Month-End ​ Rate for ​ Rate at End (Dollars in thousands, except percents) Balance Balance Balance the Year of the Year Other borrowings $ 14,530 $ 10,033 $ 16,100 2.10 % 4.30 % FHLB advances ​ ​ 100,400 ​ ​ 32,647 ​ ​ 125,975 2.73 ​ 4.45 ​ Total short-term borrowings ​ $ 114,930 ​ $ 42,680 ​ $ 142,075 2.58 % 4.43 % ​
Schedule of long-term debt consisting of advances	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Interest Rate ​ ​ ​ ​ ​ (Dollars in thousands, except percents) Fixed ​ ​ ​ March 31, 2023 ​ ​ December 31, 2022 March 2023 ​ 4.69 % ​ $ ​ ​ $ 555 ​ March 2025 ​ 4.37 ​ ​ ​ 10,000 ​ ​ ​ ​ March 2026 ​ 4.20 ​ ​ ​ 15,000 ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 25,000 ​ $ 555 ​
Schedule of maturities of long-term debt	​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ ​ ​ 2025 ​ $ 10,000 ​ 2026 ​ 15,000 ​ ​ ​ $ 25,000 ​

Summary of significant accoun_3

Summary of significant accounting policies - Nature of operations and Basis of presentation (Details)		3 Months Ended
	Apr. 28, 2023 $ / shares	Mar. 31, 2023 Office $ / shares	Mar. 31, 2022 $ / shares
Summary of significant accounting policies
Number of full-service community banking offices | Office		28
Dividends declared | $ / shares	$ 0.41	$ 0.41	$ 0.39

Summary of significant accoun_4

Summary of significant accounting policies - Adoption of new accounting standard (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 25,444		$ 27,472	$ 28,407	$ 28,383
Stockholders' equity	328,634		315,350	$ 320,461	$ 340,126
Accrued interest receivable on loans	9,800
Accrued interest receivable on available of sale securities	1,600
Accrued interest receivable on held to maturity securities	191
Cumulative impact of adoption | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		$ 3,000	$ (3,263)
Stockholders' equity	$ 2,364	$ 2,400

Other comprehensive income (l_3

Other comprehensive income (loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other comprehensive income (loss)
Net unrealized loss on investment securities available-for-sale	$ (55,495)	$ (66,250)
Income tax benefit	(11,950)	(14,266)
Net of income taxes	(43,545)	(51,984)
Benefit plan adjustments	(5,499)	(5,499)
Income tax benefit	1,184	1,184
Net of income taxes	(4,315)	(4,315)
Derivative adjustments	(2,017)	(47)
Income tax (benefit) expense	(434)	(10)
Net of income taxes	(1,583)	(37)
Accumulated other comprehensive loss	$ (49,442)	$ (56,336)

Earnings per share - Schedule o

Earnings per share - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings per share
Net income, Basic	$ 7,579	$ 9,630
Average common shares outstanding - Basic	7,157,553	7,172,455
Earnings per share - Basic	$ 1.06	$ 1.34
Net income, Diluted	$ 7,579	$ 9,630
Average common shares outstanding - Diluted	7,198,970	7,216,421
Earnings per share - Diluted	$ 1.05	$ 1.33

Investment securities - Amortiz

Investment securities - Amortized Cost and Fair Value of Investment Securities Aggregated by Investment Category (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment Securities
Available-for-sale, Amortized Cost	$ 473,620	$ 543,953
Available-for-sale, Gross Unrealized Gains	6	93
Available-for-sale, Gross Unrealized Losses	55,501	66,343
Available-for-sale, Fair Value	418,125	477,703
Held-to-maturity, Amortized Cost	89,705	91,179
Held-to-maturity, Gross Unrealized Gains	8	1
Held-to-maturity, Gross Unrealized Losses	12,640	14,617
Held-to-maturity, Fair value	77,073	76,563
U.S. Treasury securities
Investment Securities
Available-for-sale, Amortized Cost	197,660	199,937
Available-for-sale, Gross Unrealized Losses	16,096	19,640
Available-for-sale, Fair Value	181,564	180,297
U.S. Government-sponsored enterprises state and municipals
Investment Securities
Available-for-sale, Amortized Cost	16,872	16,955
Available-for-sale, Gross Unrealized Losses	441	585
Available-for-sale, Fair Value	16,431	16,370
State and municipals, Taxable
Investment Securities
Available-for-sale, Amortized Cost	68,426	68,946
Available-for-sale, Gross Unrealized Gains	5
Available-for-sale, Gross Unrealized Losses	11,227	13,588
Available-for-sale, Fair Value	57,204	55,358
State and municipals, Tax-exempt
Investment Securities
Available-for-sale, Amortized Cost	77,668	99,774
Available-for-sale, Gross Unrealized Gains	1	93
Available-for-sale, Gross Unrealized Losses	9,095	11,460
Available-for-sale, Fair Value	68,574	88,407
Tax-exempt state and municipals
Investment Securities
Held-to-maturity, Amortized Cost	11,228	11,237
Held-to-maturity, Gross Unrealized Gains	8	1
Held-to-maturity, Gross Unrealized Losses	674	841
Held-to-maturity, Fair value	10,562	10,397
Residential mortgage-backed securities, U.S. government agencies
Investment Securities
Available-for-sale, Amortized Cost	942	982
Available-for-sale, Gross Unrealized Losses	34	40
Available-for-sale, Fair Value	908	942
Held-to-maturity, Amortized Cost	16,806	17,304
Held-to-maturity, Gross Unrealized Losses	2,541	3,016
Held-to-maturity, Fair value	14,265	14,288
Residential mortgage-backed securities, U.S. government-sponsored enterprises
Investment Securities
Available-for-sale, Amortized Cost	95,947	141,231
Available-for-sale, Gross Unrealized Losses	17,735	20,112
Available-for-sale, Fair Value	78,212	121,119
Held-to-maturity, Amortized Cost	61,671	62,638
Held-to-maturity, Gross Unrealized Losses	9,425	10,760
Held-to-maturity, Fair value	52,246	51,878
Commercial mortgage-backed Securities, U.S. government-sponsored enterprises
Investment Securities
Available-for-sale, Amortized Cost	12,105	12,128
Available-for-sale, Gross Unrealized Losses	484	544
Available-for-sale, Fair Value	11,621	11,584
Corporate debt securities
Investment Securities
Available-for-sale, Amortized Cost	4,000	4,000
Available-for-sale, Gross Unrealized Losses	389	374
Available-for-sale, Fair Value	$ 3,611	$ 3,626

Investment securities - Maturit

Investment securities - Maturity Distribution of Debt Securities Classified as Available-for-Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment securities
Within one year	$ 15,202
After one but within five years	176,975
After five but within ten years	66,629
After ten years	66,319
Available for sale securities	325,125
Mortgage-backed and other amortizing securities	93,000
Total	$ 418,125	$ 477,703

Investment securities - Summary

Investment securities - Summary of Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amortized Cost of Held-to-maturity Securities
Amortized Cost, After five but within ten years, Held to maturity	$ 8,877
Amortized Cost, After ten years, Held to maturity	2,351
Amortized Cost, Held to maturity	11,228
Amortized Cost, Mortgage-backed securities, Held to maturity	78,477
Held-to-maturity, Amortized Cost	89,705	$ 91,179
Fair Value of Held-to-maturity Securities
Fair Value, After five but within ten years, Held to maturity	8,355
Fair Value, After ten years, Held to maturity	2,207
Fair Value, Held to maturity	10,562
Fair Value, Mortgage-backed securities, Held to maturity	66,511
Held to maturity, Fair Value	$ 77,073	$ 76,563

Investment securities - Pledged

Investment securities - Pledged Securities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
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	$ 151.2	$ 168
U.S. Government-sponsored enterprises state and municipals
Available-for-sale and Held-to-maturity securities
Maximum percentage of stockholders' equity exceeded for securities of any individual issuer	10%	10%

Investment securities - Fair Va

Investment securities - Fair Value and Unrealized Losses of Investment Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position	13	98
Less Than 12 Months, Fair Value	$ 7,365	$ 159,303
Less Than 12 Months, Unrealized Losses	$ 177	$ 9,341
12 Months or Greater, Number of Securities in a Loss Position	265	204
12 Months or Greater, Fair Value	$ 480,662	$ 385,821
12 Months or Greater, Unrealized Losses	$ 67,964	$ 71,619
Total, Number of Securities in a Loss Position	278	302
Total, Fair Value	$ 488,027	$ 545,124
Total, Unrealized Losses	$ 68,141	$ 80,960
U.S. Treasury securities
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security		5
Less Than 12 Months, Fair Value		$ 23,700
Less Than 12 Months, Unrealized Losses		$ 1,887
12 Months or Greater, Number of Securities in a Loss Position | security	43	40
12 Months or Greater, Fair Value	$ 181,564	$ 156,597
12 Months or Greater, Unrealized Losses	$ 16,096	$ 17,753
Total, Number of Securities in a Loss Position | security	43	45
Total, Fair Value	$ 181,564	$ 180,297
Total, Unrealized Losses	$ 16,096	$ 19,640
U.S. Government-sponsored enterprises state and municipals
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security		4
Less Than 12 Months, Fair Value		$ 14,104
Less Than 12 Months, Unrealized Losses		$ 197
12 Months or Greater, Number of Securities in a Loss Position | security	5	1
12 Months or Greater, Fair Value	$ 16,431	$ 2,266
12 Months or Greater, Unrealized Losses	$ 441	$ 388
Total, Number of Securities in a Loss Position | security	5	5
Total, Fair Value	$ 16,431	$ 16,370
Total, Unrealized Losses	$ 441	$ 585
State and Municipals, Taxable
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security	2	21
Less Than 12 Months, Fair Value	$ 999	$ 19,919
Less Than 12 Months, Unrealized Losses	$ 19	$ 2,908
12 Months or Greater, Number of Securities in a Loss Position | security	63	45
12 Months or Greater, Fair Value	$ 54,709	$ 34,464
12 Months or Greater, Unrealized Losses	$ 11,208	$ 10,680
Total, Number of Securities in a Loss Position | security	65	66
Total, Fair Value	$ 55,708	$ 54,383
Total, Unrealized Losses	$ 11,227	$ 13,588
State and Municipals, Tax-exempt
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security	7	39
Less Than 12 Months, Fair Value	$ 3,095	$ 30,973
Less Than 12 Months, Unrealized Losses	$ 29	$ 1,690
12 Months or Greater, Number of Securities in a Loss Position | security	98	84
12 Months or Greater, Fair Value	$ 70,366	$ 59,664
12 Months or Greater, Unrealized Losses	$ 9,740	$ 10,611
Total, Number of Securities in a Loss Position | security	105	123
Total, Fair Value	$ 73,461	$ 90,637
Total, Unrealized Losses	$ 9,769	$ 12,301
Residential mortgage-backed securities, U.S. government agencies
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security	2	5
Less Than 12 Months, Fair Value	$ 818	$ 904
Less Than 12 Months, Unrealized Losses	$ 31	$ 39
12 Months or Greater, Number of Securities in a Loss Position | security	7	4
12 Months or Greater, Fair Value	$ 14,355	$ 14,326
12 Months or Greater, Unrealized Losses	$ 2,544	$ 3,017
Total, Number of Securities in a Loss Position | security	9	9
Total, Fair Value	$ 15,173	$ 15,230
Total, Unrealized Losses	$ 2,575	$ 3,056
Residential mortgage-backed securities, U.S. government-sponsored enterprises
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security	1	19
Less Than 12 Months, Fair Value	$ 527	$ 57,166
Less Than 12 Months, Unrealized Losses	$ 12	$ 2,029
12 Months or Greater, Number of Securities in a Loss Position | security	40	25
12 Months or Greater, Fair Value	$ 129,931	$ 115,831
12 Months or Greater, Unrealized Losses	$ 27,148	$ 28,843
Total, Number of Securities in a Loss Position | security	41	44
Total, Fair Value	$ 130,458	$ 172,997
Total, Unrealized Losses	$ 27,160	$ 30,872
Commercial mortgage-backed Securities, U.S. government-sponsored enterprises
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security	1	4
Less Than 12 Months, Fair Value	$ 1,926	$ 11,584
Less Than 12 Months, Unrealized Losses	$ 86	$ 544
12 Months or Greater, Number of Securities in a Loss Position | security	3
12 Months or Greater, Fair Value	$ 9,695
12 Months or Greater, Unrealized Losses	$ 398
Total, Number of Securities in a Loss Position | security	4	4
Total, Fair Value	$ 11,621	$ 11,584
Total, Unrealized Losses	$ 484	$ 544
Corporate debt securities
Available-for-sale and Held-to-maturity securities
Less Than 12 Months, Number of Securities in a Loss Position | security		1
Less Than 12 Months, Fair Value		$ 953
Less Than 12 Months, Unrealized Losses		$ 47
12 Months or Greater, Number of Securities in a Loss Position | security	6	5
12 Months or Greater, Fair Value	$ 3,611	$ 2,673
12 Months or Greater, Unrealized Losses	$ 389	$ 327
Total, Number of Securities in a Loss Position | security	6	6
Total, Fair Value	$ 3,611	$ 3,626
Total, Unrealized Losses	$ 389	$ 374

Investment securities (Details)

Investment securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Jan. 01, 2023
Summary of significant accounting policies
Net unrealized losses on available-for-sale securities	$ 43,500	$ 52,000
Deferred income taxes on available-for-sale securities	12,000	14,300
Proceeds from sale of available-for-sale investment securities	65,600
Net gain on available-for-sale securities	81
Allowance for credit loss on available-for-sale debt securities	0	$ 0
Allowance for credit loss on held-to-maturity	$ 0		$ 0

Loans, net and allowance for _3

Loans, net and allowance for credit losses - Net Deferred Loan Costs (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2021 USD ($) loan	Dec. 31, 2022 USD ($)
Net deferred loan costs	$ 100,000		$ 300,000
PPP
Net deferred loan costs	200,000		200,000
Fixed interest rate	1
Loans outstanding	$ 22,200,000		$ 22,300,000
PPP | Scenario, Loans Issued Before 5 June 2020 [Member]
Term of paycheck protection program	2 years
Deferral term of paycheck protection program	24 months
PPP | Scenario, Loans Issued After 5 June 2020 [Member]
Term of paycheck protection program	5 years
Deferral term of paycheck protection program	60 months
PPP Two
Net deferred loan costs		$ 4,400,000
Number of loans | loan		1,062
Proceeds from Sale of Loans Receivable		$ 121,600,000
Loans outstanding	$ 10,900,000
PPP One
Loans outstanding	$ 11,300,000

Loans, net and allowance for _4

Loans, net and allowance for credit losses - Major Classifications of Loans Outstanding (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable
Loans	$ 2,818,043	$ 2,730,116
Loans	2,818,043
Commercial
Accounts, Notes, Loans and Financing Receivable
Loans	430,098	433,048
Loans	430,098
Municipal
Accounts, Notes, Loans and Financing Receivable
Loans	169,278	166,210
Loans	169,278
Commercial, Industrial and Municipal
Accounts, Notes, Loans and Financing Receivable
Loans		599,258
Loans	599,376
Real estate
Accounts, Notes, Loans and Financing Receivable
Loans		2,040,555
Loans	2,125,370
Commercial real estate
Accounts, Notes, Loans and Financing Receivable
Loans	1,782,911	1,709,827
Loans	1,782,911
Residential real estate
Accounts, Notes, Loans and Financing Receivable
Loans	342,459	330,728
Loans	342,459
Consumer
Accounts, Notes, Loans and Financing Receivable
Loans	93,297	90,303
Loans	93,297
Indirect Auto
Accounts, Notes, Loans and Financing Receivable
Loans		76,461
Loans	86,587
Consumer Other
Accounts, Notes, Loans and Financing Receivable
Loans		$ 13,842
Loans	$ 6,710

Loans, net and allowance for _5

Loans, net and allowance for credit losses - Changes in Allowance for Loan Losses Account by Major Classification of Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Allowance for loan losses:
Beginning Balance	$ 27,472	$ 28,383
Charge-offs	(75)	(355)
Recoveries	66	79
Provisions (credits)	1,244	300
Ending balance	25,444	28,407
Cumulative impact of adoption | ASU 2016-13
Allowance for loan losses:
Beginning Balance	(3,263)
Adjusted Balance
Allowance for loan losses:
Beginning Balance	24,209
Commercial
Allowance for loan losses:
Beginning Balance	4,365	7,466
Charge-offs	(4)	(161)
Recoveries		9
Provisions (credits)	197	(887)
Ending balance	2,481	6,427
Commercial | Cumulative impact of adoption | ASU 2016-13
Allowance for loan losses:
Beginning Balance	(1,683)
Commercial | Adjusted Balance
Allowance for loan losses:
Beginning Balance	2,682
Municipal
Allowance for loan losses:
Beginning Balance	1,247	987
Provisions (credits)	324	179
Ending balance	2,318	1,166
Municipal | Cumulative impact of adoption | ASU 2016-13
Allowance for loan losses:
Beginning Balance	747
Municipal | Adjusted Balance
Allowance for loan losses:
Beginning Balance	1,994
Commercial real estate
Allowance for loan losses:
Beginning Balance	17,915	15,928
Charge-offs		(132)
Recoveries	1	16
Provisions (credits)	1,120	977
Ending balance	15,692	16,789
Commercial real estate | Cumulative impact of adoption | ASU 2016-13
Allowance for loan losses:
Beginning Balance	(3,344)
Commercial real estate | Adjusted Balance
Allowance for loan losses:
Beginning Balance	14,571
Residential real estate
Allowance for loan losses:
Beginning Balance	3,072	3,209
Recoveries	16	3
Provisions (credits)	207	43
Ending balance	3,868	3,255
Residential real estate | Cumulative impact of adoption | ASU 2016-13
Allowance for loan losses:
Beginning Balance	987
Residential real estate | Adjusted Balance
Allowance for loan losses:
Beginning Balance	4,059
Consumer
Allowance for loan losses:
Beginning Balance	873	793
Charge-offs	(71)	(62)
Recoveries	49	51
Provisions (credits)	204	(12)
Ending balance	1,085	$ 770
Consumer | Cumulative impact of adoption | ASU 2016-13
Allowance for loan losses:
Beginning Balance	30
Consumer | Adjusted Balance
Allowance for loan losses:
Beginning Balance	$ 903

Loans, net and allowance for _6

Loans, net and allowance for credit losses - Allocation of Allowance for Loan Losses and Related Loans by Major Classification of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Allowance for loan losses:
Ending balance: individually evaluated for impairment	$ 14	$ 40
Ending balance: collectively evaluated for impairment	25,430	27,432
Loans receivable:
Ending balance	2,818,043	2,730,116
Ending balance: individually evaluated for impairment	1,666	3,921
Ending balance: collectively evaluated for impairment	2,816,363	2,726,195
Commercial
Allowance for loan losses:
Ending balance: individually evaluated for impairment	14	19
Ending balance: collectively evaluated for impairment	2,467	4,346
Loans receivable:
Ending balance	430,098	433,048
Ending balance: individually evaluated for impairment	10	98
Ending balance: collectively evaluated for impairment	430,074	432,950
Municipal
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	2,318	1,247
Loans receivable:
Ending balance	169,278	166,210
Ending balance: collectively evaluated for impairment	169,278	166,210
Commercial real estate
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	15,692	17,915
Loans receivable:
Ending balance	1,782,911	1,709,827
Ending balance: individually evaluated for impairment	867	2,063
Ending balance: collectively evaluated for impairment	1,782,044	1,707,764
Residential real estate
Allowance for loan losses:
Ending balance: individually evaluated for impairment		21
Ending balance: collectively evaluated for impairment	3,868	3,051
Loans receivable:
Ending balance	342,459	330,728
Ending balance: individually evaluated for impairment	789	1,760
Ending balance: collectively evaluated for impairment	341,670	328,968
Consumer
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	1,085	873
Loans receivable:
Ending balance	93,297	90,303
Ending balance: collectively evaluated for impairment	$ 93,297	$ 90,303

Loans, net and allowance for _7

Loans, net and allowance for credit losses - Nonaccrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Nonaccrual Loans	$ 1,798	$ 2,035
Nonaccrual with an Allowance for Credit Losses	14	19
Nonaccrual with no Allowance for Credit Losses	1,784	2,016
Interest Income Not Recorded for Nonaccrual Loans	379
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Nonaccrual Loans	14	86
Nonaccrual with an Allowance for Credit Losses	14	19
Nonaccrual with no Allowance for Credit Losses		67
Interest Income Not Recorded for Nonaccrual Loans	5
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Nonaccrual Loans	867	1,155
Nonaccrual with no Allowance for Credit Losses	867	1,155
Interest Income Not Recorded for Nonaccrual Loans	374
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Nonaccrual Loans	723	562
Nonaccrual with no Allowance for Credit Losses	723	562
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Nonaccrual Loans	194	232
Nonaccrual with no Allowance for Credit Losses	$ 194	$ 232

Loans, net and allowance for _8

Loans, net and allowance for credit losses - Summarized Information in Concerning to Impaired Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	$ 3,967
Unpaid Principal Balance, With no related allowance, Total	5,244
Average Recorded Investment, With no related allowance, Total	3,757
Interest Income Recognized, With no related allowance, Total	18
Recorded Investment, With an allowance recorded, Total	734
Unpaid Principal Balance, With an allowance recorded, Total	747
Related Allowance, With an allowance recorded, Total	115
Average Recorded Investment, With an allowance recorded, Total	846
Interest Income Recognized, With an allowance recorded, Total	7
Recorded Investment, Total	4,701
Unpaid Principal Balance, Total	5,991
Average Recorded Investment, Total	4,603
Interest Income Recognized, Total	25
Commercial
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	138
Unpaid Principal Balance, With no related allowance, Total	475
Average Recorded Investment, With no related allowance, Total	148
Interest Income Recognized, With no related allowance, Total	2
Recorded Investment, With an allowance recorded, Total	21
Unpaid Principal Balance, With an allowance recorded, Total	21
Related Allowance, With an allowance recorded, Total	21
Average Recorded Investment, With an allowance recorded, Total	31
Recorded Investment, Total	159
Unpaid Principal Balance, Total	496
Average Recorded Investment, Total	179
Interest Income Recognized, Total	2
Commercial real estate
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	2,748
Unpaid Principal Balance, With no related allowance, Total	3,505
Average Recorded Investment, With no related allowance, Total	2,562
Interest Income Recognized, With no related allowance, Total	12
Recorded Investment, With an allowance recorded, Total	440
Unpaid Principal Balance, With an allowance recorded, Total	452
Related Allowance, With an allowance recorded, Total	45
Average Recorded Investment, With an allowance recorded, Total	477
Interest Income Recognized, With an allowance recorded, Total	4
Recorded Investment, Total	3,188
Unpaid Principal Balance, Total	3,957
Average Recorded Investment, Total	3,039
Interest Income Recognized, Total	16
Residential real estate
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	874
Unpaid Principal Balance, With no related allowance, Total	1,047
Average Recorded Investment, With no related allowance, Total	874
Interest Income Recognized, With no related allowance, Total	4
Recorded Investment, With an allowance recorded, Total	273
Unpaid Principal Balance, With an allowance recorded, Total	274
Related Allowance, With an allowance recorded, Total	49
Average Recorded Investment, With an allowance recorded, Total	338
Interest Income Recognized, With an allowance recorded, Total	3
Recorded Investment, Total	1,147
Unpaid Principal Balance, Total	1,321
Average Recorded Investment, Total	1,212
Interest Income Recognized, Total	7
Consumer
Financing Receivable, Impaired
Recorded Investment, With no related allowance, Total	207
Unpaid Principal Balance, With no related allowance, Total	217
Average Recorded Investment, With no related allowance, Total	173
Recorded Investment, Total	207
Unpaid Principal Balance, Total	217
Average Recorded Investment, Total	$ 173

Loans, net and allowance for _9

Loans, net and allowance for credit losses - Major Classification of Loans Portfolio Summarized by Credit Quality (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable
2023	$ 93,492
2022	721,516
2021	714,562
2020	233,654
2019	228,244
Prior	605,139
Revolving Loans Amortized Cost Basis	221,436
Total	2,818,043
Loans	2,818,043	$ 2,730,116
Gross charge-offs, 2022	1
Gross charge-offs, 2021	35
Gross charge-offs, 2020	17
Gross charge-offs, 2019	10
Gross charge-offs, Prior	8
Gross charge-offs, Revolving Loans Amortized Cost Basis	4
Total	75
Commercial
Accounts, Notes, Loans and Financing Receivable
2023	11,546
2022	50,495
2021	46,399
2020	32,496
2019	50,313
Prior	90,214
Revolving Loans Amortized Cost Basis	148,635
Total	430,098
Loans	430,098	433,048
Gross charge-offs, Revolving Loans Amortized Cost Basis	4
Total	4
Municipal
Accounts, Notes, Loans and Financing Receivable
2023	1,400
2022	45,146
2021	91,776
2020	11,850
2019	36
Prior	18,983
Revolving Loans Amortized Cost Basis	87
Total	169,278
Loans	169,278	166,210
Commercial real estate
Accounts, Notes, Loans and Financing Receivable
2023	57,257
2022	531,819
2021	490,161
2020	152,010
2019	154,933
Prior	396,731
Total	1,782,911
Loans	1,782,911	1,709,827
Residential real estate
Accounts, Notes, Loans and Financing Receivable
2023	5,741
2022	55,051
2021	69,028
2020	29,141
2019	17,764
Prior	93,720
Revolving Loans Amortized Cost Basis	72,014
Total	342,459
Loans	342,459	330,728
Consumer
Accounts, Notes, Loans and Financing Receivable
2023	17,548
2022	39,005
2021	17,198
2020	8,157
2019	5,198
Prior	5,491
Revolving Loans Amortized Cost Basis	700
Total	93,297
Loans	93,297	90,303
Gross charge-offs, 2022	1
Gross charge-offs, 2021	35
Gross charge-offs, 2020	17
Gross charge-offs, 2019	10
Gross charge-offs, Prior	8
Total	71
Pass
Accounts, Notes, Loans and Financing Receivable
Loans		2,708,780
Pass | Commercial
Accounts, Notes, Loans and Financing Receivable
2023	11,531
2022	50,495
2021	46,353
2020	32,496
2019	50,260
Prior	89,938
Revolving Loans Amortized Cost Basis	140,615
Total	421,688
Loans		424,411
Pass | Municipal
Accounts, Notes, Loans and Financing Receivable
2023	1,400
2022	45,146
2021	91,776
2020	11,850
2019	36
Prior	18,983
Revolving Loans Amortized Cost Basis	87
Total	169,278
Loans		166,210
Pass | Commercial real estate
Accounts, Notes, Loans and Financing Receivable
2023	55,319
2022	531,819
2021	488,524
2020	151,845
2019	154,002
Prior	386,268
Total	1,767,777
Loans		1,699,041
Pass | Residential real estate
Accounts, Notes, Loans and Financing Receivable
2023	5,741
2022	55,051
2021	69,011
2020	28,927
2019	17,764
Prior	93,343
Revolving Loans Amortized Cost Basis	72,014
Total	341,851
Loans		329,098
Pass | Consumer
Accounts, Notes, Loans and Financing Receivable
2023	17,548
2022	39,005
2021	17,087
2020	8,127
2019	5,179
Prior	5,457
Revolving Loans Amortized Cost Basis	700
Total	93,103
Loans		90,020
Special Mention
Accounts, Notes, Loans and Financing Receivable
Loans		15,331
Special Mention | Commercial
Accounts, Notes, Loans and Financing Receivable
Revolving Loans Amortized Cost Basis	67
Total	67
Loans		7,822
Special Mention | Commercial real estate
Accounts, Notes, Loans and Financing Receivable
2023	1,763
2019	303
Prior	3,301
Total	5,367
Loans		7,509
Substandard
Accounts, Notes, Loans and Financing Receivable
Loans		6,005
Substandard | Commercial
Accounts, Notes, Loans and Financing Receivable
2023	15
2021	46
2019	53
Prior	276
Revolving Loans Amortized Cost Basis	7,953
Total	8,343
Loans		815
Substandard | Commercial real estate
Accounts, Notes, Loans and Financing Receivable
2023	175
2021	1,637
2020	165
2019	628
Prior	7,162
Total	9,767
Loans		3,277
Substandard | Residential real estate
Accounts, Notes, Loans and Financing Receivable
2021	17
2020	214
Prior	377
Total	608
Loans		1,630
Substandard | Consumer
Accounts, Notes, Loans and Financing Receivable
2021	111
2020	30
2019	19
Prior	34
Total	$ 194
Loans		$ 283

Loans, net and allowance for_10

Loans, net and allowance for credit losses - Information Concerning Nonaccrual Loans by Major Loan Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	$ 1,798	$ 2,035
Commercial
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	14	86
Commercial real estate
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	867	1,155
Residential real estate
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	723	562
Consumer
Financing Receivable, Recorded Investment, Past Due.
Nonaccrual loans, Total	$ 194	$ 232

Loans, net and allowance for_11

Loans, net and allowance for credit losses - Major Classification of Loans by Past Due Status (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due.
Total Due	$ 2,818,043
Loans	2,818,043	$ 2,730,116
Loans > 90 Days and Accruing	59	748
Financial Assets, Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	4,631	3,986
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	2,700	2,091
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	1,152	367
Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due.
Total Due	779	1,528
Financial Assets, Not Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	2,813,412	2,726,130
Commercial
Financing Receivable, Recorded Investment, Past Due.
Total Due	430,098
Loans	430,098	433,048
Commercial | Financial Assets, Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	170	261
Commercial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	156	137
Commercial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due		38
Commercial | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due.
Total Due	14	86
Commercial | Financial Assets, Not Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	429,928	432,787
Municipal
Financing Receivable, Recorded Investment, Past Due.
Total Due	169,278
Loans	169,278	166,210
Municipal | Financial Assets, Not Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	169,278	166,210
Commercial real estate
Financing Receivable, Recorded Investment, Past Due.
Total Due	1,782,911
Loans	1,782,911	1,709,827
Commercial real estate | Financial Assets, Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	953	438
Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	92	102
Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	616	2
Commercial real estate | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due.
Total Due	245	334
Commercial real estate | Financial Assets, Not Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	1,781,958	1,709,389
Residential real estate
Financing Receivable, Recorded Investment, Past Due.
Total Due	342,459
Loans	342,459	330,728
Loans > 90 Days and Accruing	59	748
Residential real estate | Financial Assets, Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	2,876	2,278
Residential real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	1,965	1,162
Residential real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	444	128
Residential real estate | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due.
Total Due	467	988
Residential real estate | Financial Assets, Not Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	339,583	328,450
Consumer
Financing Receivable, Recorded Investment, Past Due.
Total Due	93,297
Loans	93,297	90,303
Consumer | Financial Assets, Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	632	1,009
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	487	690
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	92	199
Consumer | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due.
Total Due	53	120
Consumer | Financial Assets, Not Past Due
Financing Receivable, Recorded Investment, Past Due.
Total Due	$ 92,665	$ 89,294

Loans, net and allowance for_12

Loans, net and allowance for credit losses - Allowance for Credit Losses on Off Balance Sheet Commitments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at December 31, 2022	$ 179
Credit recorded in noninterest expense	(185)
Total allowance for credit losses on off balance sheet commitments	264
Cumulative impact of adoption
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at December 31, 2022	$ 270

Loans, net and allowance for_13

Loans, net and allowance for credit losses - Loan Modifications and Troubled Debt Restructurings (Details)	3 Months Ended
	Mar. 31, 2023 loan
Loans, net and allowance for credit losses
Number of loans	0
Number of subsequently defaulted on loans	0

Other assets - Components of Ot

Other assets - Components of Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Other real estate owned	$ 121	$ 121
Investment in low income housing partnership	5,325	5,446
Mortgage servicing rights	906	914
Restricted equity securities (FHLB and other)	4,887	9,630
Interest rate floor and swaps	18,964	22,196
Other assets	11,354	8,165
Total	41,079	46,071
Decrease in restricted equity securities	4,700
Interest Rate Floor
Interest rate floor and swaps	1	1
Interest Rate Swaps
Interest rate floor and swaps	$ 18,485	$ 21,794

Fair value estimates - Transfer

Fair value estimates - Transfers Between Levels (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair value estimates
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	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	$ 418,206	$ 477,813
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	181,564	180,297
U.S. Government-sponsored enterprises state and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	16,431	16,370
State and Municipals, Taxable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	57,204	55,358
State and Municipals, Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	68,574	88,407
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	3,611	3,626
Residential mortgage-backed securities, U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	908	942
Residential mortgage-backed securities, U.S. government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	89,833	132,703
Common equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	81	110
Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	1	1
Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	18,485	21,794
Interest rate floor-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	(1,980)
Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	(17,914)	(21,466)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	181,645	180,407
Level 1 | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	181,564	180,297
Level 1 | Common equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	81	110
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	236,561	297,406
Level 2 | U.S. Government-sponsored enterprises state and municipals
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	16,431	16,370
Level 2 | State and Municipals, Taxable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	57,204	55,358
Level 2 | State and Municipals, Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	68,574	88,407
Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	3,611	3,626
Level 2 | Residential mortgage-backed securities, U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	908	942
Level 2 | Residential mortgage-backed securities, U.S. government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	89,833	132,703
Level 2 | Interest rate floor - other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	1	1
Level 2 | Interest rate swap-other assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets measured at fair value	18,485	21,794
Level 2 | Interest rate floor-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	(1,980)
Level 2 | Interest rate swap-other liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Liabilities measured at fair value	$ (17,914)	$ (21,466)

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	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans individually evaluated for credit loss	$ 1,680
Impaired loans		$ 220
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Loans individually evaluated for credit loss	$ 1,680
Impaired loans		$ 220

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	Mar. 31, 2023	Dec. 31, 2022
Loans individually evaluated for credit loss
Fair Value Inputs, Assets, Quantitative Information
Assets measured at fair value	$ 1,680
Loans individually evaluated for credit loss | Minimum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	22.80%
Range and weighted average of liquidation expenses	3%
Loans individually evaluated for credit loss | Maximum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	77%
Range and weighted average of liquidation expenses	6%
Loans individually evaluated for credit loss | Weighted Average
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments	67.30%
Range and weighted average of liquidation expenses	5.20%
Impaired Loans
Fair Value Inputs, Assets, Quantitative Information
Assets measured at fair value		$ 220
Impaired Loans | Minimum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments		21.60%
Range and weighted average of liquidation expenses		3%
Impaired Loans | Maximum
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments		97%
Range and weighted average of liquidation expenses		6%
Impaired Loans | Weighted Average
Fair Value Inputs, Assets, Quantitative Information
Range and weighted average of appraisal adjustments		77.70%
Range and weighted average of liquidation expenses		4.90%

Fair value estimates - Carrying

Fair value estimates - Carrying and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment securities:
Available-for-sale	$ 418,125	$ 477,703
Common equity securities	81	110
Held-to-maturity	77,073	76,563
Mortgage servicing rights	906	914
Financial liabilities:
Subordinated debentures	33,000	33,000
Carrying Value
Financial assets:
Cash and due from banks	140,583	37,868
Investment securities:
Available-for-sale	418,125	477,703
Common equity securities	81	110
Held-to-maturity	89,705	91,179
Net loans	2,792,599	2,702,644
Accrued interest receivable	11,678	11,715
Mortgage servicing rights	906	914
Restricted equity securities (FHLB and other)	4,887	9,630
Interest rate floor	1	1
Interest rate swaps	18,485	21,794
Total assets	3,477,050	3,353,558
Financial liabilities:
Deposits	3,235,967	3,046,598
Short-term borrowings	17,280	114,930
Long-term debt	25,000	555
Subordinated debentures	33,000	33,000
Accrued interest payable	2,304	903
Interest rate floor	1,980
Interest rate swap	17,914	21,466
Total liabilities	3,333,445	3,217,452
Fair Value
Financial assets:
Cash and due from banks	140,583	37,868
Investment securities:
Available-for-sale	418,125	477,703
Common equity securities	81	110
Held-to-maturity	77,073	76,563
Net loans	2,629,921	2,562,780
Accrued interest receivable	11,678	11,715
Mortgage servicing rights	1,747	1,762
Restricted equity securities (FHLB and other)	4,887	9,630
Interest rate floor	1	1
Interest rate swaps	18,485	21,794
Total assets	3,302,580	3,199,926
Financial liabilities:
Deposits	3,229,495	3,035,615
Short-term borrowings	17,280	114,743
Long-term debt	24,982	555
Subordinated debentures	31,898	53,998
Accrued interest payable	2,304	903
Interest rate floor	1,980
Interest rate swap	17,914	21,466
Total liabilities	3,325,853	3,227,280
Level 1
Financial assets:
Cash and due from banks	140,583	37,868
Investment securities:
Available-for-sale	181,564	180,297
Common equity securities	81	110
Level 2
Investment securities:
Available-for-sale	236,561	294,706
Held-to-maturity	77,073	76,563
Accrued interest receivable	11,678	11,715
Mortgage servicing rights	1,747	1,762
Restricted equity securities (FHLB and other)	4,887	9,630
Interest rate floor	1	1
Interest rate swaps	18,485	21,794
Financial liabilities:
Deposits	3,229,495	3,035,615
Short-term borrowings	17,280	114,743
Long-term debt	24,982	555
Subordinated debentures	31,898	53,998
Accrued interest payable	2,304	903
Interest rate floor	1,980
Interest rate swap	17,914	21,466
Level 3
Investment securities:
Net loans	$ 2,629,921	$ 2,562,780

Employee benefit plans - Compon

Employee benefit plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Components of net periodic pension cost:
Salaries and employee benefits expense	$ 9,080	$ 8,040
Pension Benefits
Components of net periodic pension cost:
Salaries and employee benefits expense	478	256
Interest cost	164	114
Expected return on plan assets	(293)	(352)
Amortization of unrecognized net loss	50	50
Net periodic pension income:	$ (79)	$ (188)

Employee benefit plans - Additi

Employee benefit plans - Additional Information (Details) - 2017 Plan - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award
Common stock available for grant as awards	17,364
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	0	19,787
Salaries and employee benefits expense	$ 209	$ 199
Unrecognized compensation expense	$ 800
Weighted average vesting period	1 year 6 months

Derivatives and hedging activ_3

Derivatives and hedging activities - Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Derivatives, Fair Value [Line Items]
Amortized Amount of the Hedged Assets/(Liabilities)	$ 18,964	$ 22,196
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Available-for-sale Securities, Debt Securities		Available-for-sale Securities, Debt Securities
Fair value hedges | Derivatives designated as hedging instruments | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Amortized Amount of the Hedged Assets/(Liabilities)	$ 100,000
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	1,986
Amortized Cost Basis Amount of the Hedged Assets	146,100
Amounts of designated hedged items	$ 138,600

Derivatives and hedging activ_4

Derivatives and hedging activities - Fair Values of Derivative Instruments on the Balance Sheet (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) security	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Derivatives, Fair Value
Interest rate floor and swaps	$ 18,964,000		$ 22,196,000
Liability Derivatives	20,365,000		21,466,000
Cash collateral	17,280,000		14,530,000
Net Amounts of Assets presented in the Balance Sheet	20,365,000		21,466,000
Interest income
Derivatives, Fair Value
Amount of gain or (loss) reclassified as a increase to interest income		$ 147,000
Interest Rate Swaps
Derivatives, Fair Value
Interest rate floor and swaps	18,485,000		21,794,000
Interest Rate Floor
Derivatives, Fair Value
Interest rate floor and swaps	1,000		1,000
Credit-risk contract
Derivatives, Fair Value
Cash collateral	1,700,000
Net Amounts of Assets presented in the Balance Sheet	2,000,000		2,000
Derivatives designated as hedging instruments | Other Assets.
Derivatives, Fair Value
Interest rate floor and swaps	1,000		1,000
Derivatives designated as hedging instruments | Other Liabilities.
Derivatives, Fair Value
Liability Derivatives	1,970,000
Derivatives designated as hedging instruments | Interest rate products | Other Assets.
Derivatives, Fair Value
Notional amount	25,000,000
Interest rate floor and swaps	1,000		1,000
Derivatives designated as hedging instruments | Interest rate products | Other Liabilities.
Derivatives, Fair Value
Notional amount	100,000,000
Liability Derivatives	1,970,000
Derivatives not designated as hedging instruments | Other Assets.
Derivatives, Fair Value
Interest rate floor and swaps	18,969,000		22,195,000
Derivatives not designated as hedging instruments | Other Liabilities.
Derivatives, Fair Value
Liability Derivatives	18,394,000		21,466,000
Derivatives not designated as hedging instruments | Interest rate products | Other Assets.
Derivatives, Fair Value
Notional amount	208,147,000
Interest rate floor and swaps	18,963,000		22,195,000
Derivatives not designated as hedging instruments | Interest rate products | Other Liabilities.
Derivatives, Fair Value
Notional amount	208,147,000
Liability Derivatives	18,392,000		21,466,000
Derivatives not designated as hedging instruments | Other | Other Assets.
Derivatives, Fair Value
Notional amount	1,522,000
Interest rate floor and swaps	6,000
Derivatives not designated as hedging instruments | Other | Other Liabilities.
Derivatives, Fair Value
Notional amount	6,307,000
Liability Derivatives	$ 2,000
Derivatives not designated as hedging instruments | Risk participation agreements
Derivatives, Fair Value
Notional amount			1,500,000
Derivatives not designated as hedging instruments | Interest Rate Swaps
Derivatives, Fair Value
Number of instruments held | security	96
Notional amount	$ 209,700,000		187,300,000
Derivatives not designated as hedging instruments | Interest Rate Floor
Derivatives, Fair Value
Notional amount			$ 25,000,000
Cash Flow Hedge | Interest income
Derivatives, Fair Value
Amount of gain or (loss) reclassified as a increase to interest income	$ 32,000

Derivatives and hedging activ_5

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		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Derivative Instruments, Gain (Loss)
Amount of Gain (Loss) Recognized in OCI Included Component	$ (2,017)		$ (47)
Interest income
Derivative Instruments, Gain (Loss)
Amount of Gain Reclassified from Accumulated OCI into Income	(16)	$ 131
Cash Flow Hedge
Derivative Instruments, Gain (Loss)
Amount of (Loss) Recognized in OCI on Derivative	1	(361)
Amount of Gain (Loss) Recognized in OCI Included Component		(439)
Amount of (Loss) Recognized in OCI Excluded Component	1	78
Amount of Gain Reclassified from Accumulated OCI into Income	(16)	131
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component		147
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component	16	(16)
Cash Flow Hedge | Interest rate products | Interest income
Derivative Instruments, Gain (Loss)
Amount of (Loss) Recognized in OCI on Derivative	1	(361)
Amount of Gain (Loss) Recognized in OCI Included Component		(439)
Amount of (Loss) Recognized in OCI Excluded Component	1	78
Amount of Gain Reclassified from Accumulated OCI into Income	(16)	131
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income Included Component		147
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income Excluded Component	$ 16	$ (16)

Derivatives and hedging activ_6

Derivatives and hedging activities - Effect of Fair Value and Cash Flow Hedge Accounting on the Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
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	$ (1,970)	$ (493)
The effects of fair value and cash flow hedging: Gain or (loss) on cash flow hedging relationships
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - excluded component	$ (16)	$ (16)
Derivative, Excluded Component, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Dividend Income, Operating	Interest and Dividend Income, Operating
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	$ 15	$ 131
The effects of fair value and cash flow hedging: Gain or (loss) on cash flow hedging relationships
Hedged items	1,986
Derivatives designated as hedging instruments	(1,955)
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income	$ (16)	131
Amount of gain or (loss) reclassified from accumulated other comprehensive income into income - included component		$ 147

Derivatives and hedging activ_7

Derivatives and hedging activities - Effect of Other Derivative Instruments on the Income Statement (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income	$ (161)	$ 242
Interest Rate Swaps | Interest Rate Swap Revenue
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income	(161)	240
Other
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income		2
Fee Income | Interest Rate Swap Revenue
Derivative Instruments, Gain (Loss)
Amount of Gain Recognized in Income	$ 384	$ 103

Derivatives and hedging activ_8

Derivatives and hedging activities - Offsetting Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	$ 18,964	$ 22,196
Net Amounts of Assets presented in the Balance Sheet	18,964	22,196
Gross Amounts Not Offset presented in the Balance Sheet - Cash Collateral Received	17,280	14,530
Net Amount	1,684	7,666
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	20,365	21,466
Net Amounts of Assets presented in the Balance Sheet	20,365	21,466
Gross Amounts Not Offset presented in the Balance Sheet - Financial Instruments	20,365	$ 21,466
Cash collateral paid but not offset	$ 1,710

Deposits - Components of Intere

Deposits - Components of Interest-bearing and Noninterest-bearing Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Deposits.
Money market accounts	$ 775,511	$ 685,323
Now accounts	698,888	772,712
Savings accounts	500,709	523,931
Time deposits less than $250	400,327	199,136
Time deposits $250 or more	114,443	92,731
Total interest-bearing deposits	2,489,878	2,273,833
Noninterest-bearing deposits	746,089	772,765
Total deposits	$ 3,235,967	$ 3,046,598

Deposits (Details)

Deposits (Details) $ in Millions	Mar. 31, 2023 USD ($)
Retail accounts
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	48.60%
Commercial accounts
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	33.20%
Municipal relationships
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	12.50%
Letters of credit pledged as collateral	$ 292
Brokered deposits
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	5.70%
Deposit insured by FDIC
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	76.60%
Deposit uninsured by FDIC
Cash and Cash Equivalents [Line Items]
Percentage of deposit held	23.40%
Deposit liabilities uninsured by FDIC	$ 757.4

Borrowings (Details)

Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Short-term borrowings
Ending Balance	$ 17,280	$ 114,930
Average Balance	91,530	42,680
Maximum Month-End Balance	$ 175,280	$ 142,075
Weighted Average Rate for the Year	4.81%	2.58%
Weighted Average Rate at End of Year	4.83%	4.43%
Other borrowings
Short-term borrowings
Ending Balance	$ 17,280	$ 14,530
Average Balance	13,841	10,033
Maximum Month-End Balance	$ 17,280	$ 16,100
Weighted Average Rate for the Year	4.57%	2.10%
Weighted Average Rate at End of Year	4.83%	4.30%
FHLB Advances
Short-term borrowings
Ending Balance		$ 100,400
Average Balance	$ 77,689	32,647
Maximum Month-End Balance	$ 158,000	$ 125,975
Weighted Average Rate for the Year	4.86%	2.73%
Weighted Average Rate at End of Year		4.45%

Borrowings - Additional Informa

Borrowings - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Short-term borrowings
Short-term borrowings	$ 17,280	$ 114,930
Other borrowings	17,300
Peoples Bank
Short-term borrowings
Maximum borrowing capacity	1,200,000	1,200,000
Outstanding amount in borrowings	25,000	101,000
Amount of credit facility used to issue standby letters of credit to collateralize public fund deposits	$ 292,000	$ 388,800

Borrowings - Long-term debt adv

Borrowings - Long-term debt advances (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument
Long-term debt	$ 25,000	$ 555
Long-term 4.69% fixed rate debt due March 2023
Debt Instrument
Long-term debt		$ 555
Fixed interest rate (as a percent)		4.69%
Long-term 4.37% fixed rate debt due March 2025
Debt Instrument
Long-term debt	$ 10,000
Fixed interest rate (as a percent)	4.37%
Long-term 4.20% fixed rate debt due March 2026
Debt Instrument
Long-term debt	$ 15,000
Fixed interest rate (as a percent)	4.20%

Borrowings - Maturities of long

Borrowings - Maturities of long-term debt (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Borrowings
2025	$ 10,000
2026	15,000
Total long-term debt	25,000	$ 555
FHLB long-term advances	$ 25,000

Subordinated debt (Details)

Subordinated debt (Details) - 2020 Notes $ in Millions	Jun. 01, 2020 USD ($)
Debt Instrument
Aggregate principal amount	$ 33
Rate of interest for first five years	5.375%
Duration interest rate in effect	5 years
Percentage of debt redeemed	100%
Minimum
Debt Instrument
Floated interest rate	4.75%
Number of days notice to redeem debt	10 days