ACNB (ACNB) 10-K 14 Mar 24 2023 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Mar. 08, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	1-35015
Entity Registrant Name	ACNB CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2233457
Entity Address, Address Line One	16 Lincoln Square
Entity Address, City or Town	Gettysburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	17325
City Area Code	717
Local Phone Number	334-3161
Title of 12(b) Security	Common Stock, $2.50 par value per share
Trading Symbol	ACNB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Document Financial Statement Error Correction	false
Entity Public Float			$ 274,100
Entity Common Stock, Shares Outstanding		8,505,311
Entity Central Index Key	0000715579
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false
ICFR Auditor Attestation Flag	true

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2023
Audit Information [Abstract]
Auditor Firm ID	173
Auditor Name	Crowe LLP
Auditor Location	Washington, DC

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Cash and due from banks	$ 21,442	$ 40,067
Interest-bearing deposits with banks	44,516	128,094
Total Cash and Cash Equivalents	65,958	168,161
Equity securities with readily determinable fair values	928	1,719
Investment securities available for sale, at estimated fair value	451,693	553,554
Investment securities held to maturity, at amortized cost (fair value $59,057, $58,078)	64,600	64,977
Loans held for sale	280	123
Total loans, net of unearned income	1,627,988	1,538,610
Less: Allowance for credit losses	(19,969)	(17,861)
Loans, net	1,608,019	1,520,749
Assets held for sale	0	3,393
Premises and equipment, net	26,283	27,053
Right of use asset	2,615	3,162
Restricted investment in bank stocks	9,677	1,629
Investment in bank-owned life insurance	79,871	77,993
Investments in low-income housing partnerships	1,003	1,129
Goodwill	44,185	44,185
Intangible assets, net	9,082	10,332
Foreclosed assets held for resale	467	474
Other assets	54,186	46,874
Total Assets	2,418,847	2,525,507
LIABILITIES AND STOCKHOLDERS’ EQUITY
Deposits: Non-interest bearing	500,332	595,049
Deposits: Interest bearing	1,361,481	1,603,926
Total Deposits	1,861,813	2,198,975
Short-term borrowings	56,882	41,954
Long-term borrowings	195,292	21,000
Lease liability	2,615	3,162
Allowance for unfunded commitments	1,719	92
Other liabilities	23,065	15,282
Total Liabilities	2,141,386	2,280,465
STOCKHOLDERS' EQUITY
Preferred stock, $2.50 par value; 20,000,000 shares authorized; no shares outstanding at December 31, 2023 and 2022, respectively	0	0
Common stock, $2.50 par value; 20,000,000 shares authorized; 8,896,119 and 8,838,720 shares issued; 8,511,453 and 8,515,120 shares outstanding at December 31, 2023 and 2022, respectively	22,231	22,086
Treasury stock, at cost 384,666 and 323,600 shares at December 31, 2023 and 2022, respectively	(10,954)	(8,927)
Additional paid-in capital	97,602	96,022
Retained earnings	213,491	193,873
Accumulated other comprehensive loss	(44,909)	(58,012)
Total Stockholders’ Equity	277,461	245,042
Total Liabilities and Stockholders’ Equity	2,418,847	2,525,507
Securities held to maturity, fair value	$ 59,057	$ 58,078

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 59,057	$ 58,078
Preferred stock, par value	$ 2.50	$ 2.50
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 2.50	$ 2.50
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	8,896,119	8,838,720
Common stock, shares outstanding	8,511,453	8,515,120
Treasury stock, shares	384,666	323,600

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Loans, including fees
Taxable	$ 79,433	$ 68,898
Tax-exempt	1,405	1,348
Securities:
Taxable	10,985	9,799
Tax-exempt	1,168	1,144
Dividends	331	104
Other	3,318	5,756
Total Interest and Dividend Income	96,640	87,049
INTEREST EXPENSE
Deposits	3,695	2,561
Short-term borrowings	898	77
Long-term borrowings	3,727	986
Total Interest Expense	8,320	3,624
Net Interest Income	88,320	83,425
Net Interest Income after Provisions for Credit Losses and Unfunded Commitments	87,476	83,425
NONINTEREST INCOME
Insurance commissions	9,319	8,307
Earnings on investment in bank-owned life insurance	1,878	1,532
Net losses on sales or calls of investment securities	(5,240)	(234)
Net gains (losses) on equity securities	18	(298)
Net gains on sales of low income housing partnership	0	421
Gain on assets held for sale	337	0
Other	1,127	1,044
Total Noninterest Income	18,445	21,807
NONINTEREST EXPENSES
Salaries and employee benefits	40,931	35,979
Net occupancy	3,908	4,076
Equipment	6,514	6,612
Other tax	1,269	1,632
Professional services	2,320	2,086
Supplies and postage	808	823
Marketing and corporate relations	612	299
FDIC and regulatory	1,388	1,128
Intangible assets amortization	1,424	1,492
Other	6,898	6,154
Total Noninterest Expenses	66,072	60,281
Income Before Income Taxes	39,849	44,951
Provision for income taxes	8,161	9,199
Net Income	$ 31,688	$ 35,752
PER SHARE DATA
Basic earnings	$ 3.72	$ 4.15
Diluted earnings	$ 3.71	$ 4.15
Financing Receivable Excluding Unfunded Commitments
INTEREST EXPENSE
Provision for credit losses	$ 860	$ 0
Unfunded Loan Commitment
INTEREST EXPENSE
Provision for credit losses	(16)	0
Service charges on deposits
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	3,958	4,066
Wealth management
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	3,644	3,160
ATM debit card charges
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	3,348	3,322
Gain from mortgage loans held for sale
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	$ 56	$ 487

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 31,688	$ 35,752
INVESTMENT SECURITIES
Unrealized gains (losses) arising during the period, net of income tax expense (benefit) of $1,814 and $(14,499), respectively	6,814	(46,441)
Reclassification adjustment for net AFS investment securities losses included in net income, net of income tax benefit of $1,188 and $55, respectively	4,052	193
Total unrealized gain (loss) on AFS investment securities	10,866	(46,248)
Unrealized losses on securities previously transferred to HTM, net of income tax benefit of $— and $(1,072), respectively	0	(3,751)
Amortization of unrealized losses on AFS investment securities transferred to HTM, net of income taxes of $203 and $211, respectively	916	739
PENSION
Amortization of pension net loss, transition liability, and prior service cost, net of income taxes of $76 and $90, respectively	258	317
Unrecognized net gain, net of income taxes of $312 and $15, respectively	1,063	476
Total unrealized gain on pension	1,321	793
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	13,103	(48,467)
TOTAL COMPREHENSIVE INCOME (LOSS)	$ 44,791	$ (12,715)

CONSOLIDATED STATEMENTS OF CO_3

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
SECURITIES: Unrealized gains (losses) arising during the period, income taxes	$ 1,814	$ (14,499)
SECURITIES: Reclassification adjustment from AOCI for sale of securities, tax	1,188	55
SECURITIES: Transfer to held-to-maturity, Unrealized losses gains arising during the period, income taxes	0	(1,072)
SECURITIES: Transfer from available-for-sale, Unrealized losses arising during the period, income taxes	203	211
PENSION: Amortization of pension net loss, transition liability, and prior service cost, income taxes	76	90
PENSION: Unrecognized net loss, income taxes	$ 312	$ 15

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2021	$ 272,114	$ 21,978	$ (2,245)	$ 94,688	$ 167,238	$ (9,545)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	35,752				35,752
Other comprehensive income (loss), net of taxes	(48,467)					(48,467)
Common stock shares issued	713	52		661
Repurchased shares	(6,682)		(6,682)
Restricted stock grants	729	56		673
Cash dividends declared	(9,117)				(9,117)
Ending Balance at Dec. 31, 2022	245,042	22,086	(8,927)	96,022	193,873	(58,012)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	31,688				31,688
Cumulative effect for adoption of Topic 326, net of tax	(2,368)				(2,368)
Other comprehensive income (loss), net of taxes	13,103					13,103
Common stock shares issued	721	51		670
Repurchased shares	(2,027)		(2,027)
Restricted stock grants	0	94		(94)
Compensation expense for restricted shares	1,004			1,004
Cash dividends declared	(9,702)				(9,702)
Ending Balance at Dec. 31, 2023	$ 277,461	$ 22,231	$ (10,954)	$ 97,602	$ 213,491	$ (44,909)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Treasury stock acquired, shares		206,929
Restricted stock grants, shares	43,074	21,935
Cash dividends declared, per share	$ 1.14	$ 1.06

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 31,688	$ 35,752
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sales of loans originated for sale	(56)	(487)
Gain on sales of assets held for sale	(337)	0
Loss on sale of premises and equipment	0	41
Earnings on investment in bank-owned life insurance	(1,878)	(1,532)
Loss on sales or calls of securities	5,240	234
(Gain) loss on equity securities	(18)	298
Gain on sale of low-income housing partnership	0	(421)
Restricted stock compensation expense	1,004	729
Depreciation and amortization	3,362	3,796
Provision for credit losses and provision for unfunded commitments	844	0
Net amortization of investment securities premiums	690	2,156
Increase in interest receivable	(1,165)	(1,395)
Increase (decrease) in interest payable	743	(58)
Mortgage loans originated for sale	(2,646)	(36,664)
Proceeds from sales of loans originated for sale	2,545	39,221
Increase in other assets	(7,449)	(4,303)
Decrease in deferred tax expense	2,376	924
Increase in other liabilities	5,659	910
Net Cash Provided by Operating Activities	40,602	39,201
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from calls/maturities of investment securities held to maturity	1,097	2,903
Proceeds from calls/maturities of investment securities available for sale	32,594	58,578
Proceeds from sales of investment securities held to maturity	0	1,054
Proceeds from sales of investment securities available for sale	125,241	3,129
Proceeds from sales of equity securities	592	811
Purchase of investment securities available for sale	(48,838)	(284,336)
Purchase of investment securities held to maturity	0	(22,204)
Purchase of equity securities	0	(206)
(Purchase)/redemption of restricted investment in bank stocks	(8,048)	674
Net increase in loans	(89,589)	(71,829)
Proceeds from sale of low-income housing partnerships	0	421
Purchase of bank-owned life insurance	0	(12,200)
Acquisition of insurance books of business/agency	(174)	(7,800)
Capital expenditures	(1,168)	(1,811)
Proceeds from sales of premises and equipment	0	1,093
Proceeds from sales of assets held for sale	3,730	0
Net Cash (Used in) Provided by Investing Activities	15,437	(331,723)
CASH FLOWS FROM FINANCING ACTIVITIES
Net decrease in noninterest-bearing deposits	(94,717)	(28,311)
Net decrease in interest-bearing deposits	(242,445)	(199,103)
Net increase in short-term borrowings	14,928	6,752
Proceeds from long-term borrowings	175,000	1,500
Repayments on long-term borrowings	0	(15,200)
Dividends paid	(9,702)	(9,117)
Common stock repurchased	(2,027)	(6,682)
Common stock issued	721	713
Net Cash Used In Financing Activities	(158,242)	(249,448)
Net Decrease in Cash and Cash Equivalents	(102,203)	(541,970)
CASH AND CASH EQUIVALENTS — BEGINNING	168,161	710,131
CASH AND CASH EQUIVALENTS — ENDING	65,958	168,161
Supplemental disclosures of cash flow information:
Cash paid for interest	7,155	3,682
Cash paid for income taxes	10,030	7,225
Supplemental disclosures of certain noncash activities:
Recognition of operating lease right of use assets	126	472
Recognition of operating lease liabilities	126	472
Investments transferred from available for sale to held to maturity	0	39,683
Premises and equipment transferred to fixed assets held for sale	0	3,393
Loans transferred to foreclosed assets held for resale and other foreclosed transactions	$ 0	$ 474

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations ACNB Corporation, headquartered in Gettysburg, Pennsylvania, provides banking, insurance, and financial services to businesses and consumers through its wholly-owned subsidiaries, ACNB Bank and ACNB Insurance Services, Inc., formerly Russell Insurance Group, Inc. The Bank engages in full-service commercial and consumer banking and wealth management services, including trust and retail brokerage, through its 26 community banking offices, including 17 community banking office locations in Adams, Cumberland, Franklin, and York Counties, Pennsylvania, and nine community banking office locations in Carroll and Frederick Counties, Maryland. There are also loan production offices in Lancaster and York, Pennsylvania, and Hunt Valley, Maryland. ACNB Insurance Services, Inc. is a full-service insurance agency based in Westminster, Maryland, with additional locations in Jarrettsville, Maryland, and Gettysburg, Pennsylvania. The agency offers a broad range of property, casualty, health, life and disability insurance to both individual and commercial clients. On February 28, 2022, ACNB Insurance Services, Inc. completed the acquisition of the business and assets of Hockley & O’Donnell Insurance Agency, LLC, Gettysburg, PA. This insurance agency acquisition in Adams County, PA, leveraged the affiliation with ACNB Corporation and ACNB Bank in their headquarters’ market. ACNB Bank announced plans to rebrand its Maryland banking divisions on December 19, 2022. Effective January 1, 2023, these divisions, NWSB Bank and FCB Bank, formally adopted the ACNB Bank name and brand identity in the counties of Carroll and Frederick in northern Maryland, respectively. The goal of this rebranding initiative was to eliminate customer confusion, especially for those who bank in multiple markets, and to provide future operating and cost efficiencies. Further, this step now fully aligns the brand of ACNB Bank with that of ACNB Insurance Services which was rebranded effective January 1, 2022, to create enhanced synergies and market recognition throughout the Corporation’s Market Area. Basis of Financial Statements The consolidated financial statements have been prepared in accordance with GAAP and include the accounts of the Corporation and its wholly-owned subsidiaries. All significant intercompany transactions have been eliminated. Assets held by the Corporation’s Wealth Management Department, including trust and retail brokerage, in an agency, fiduciary or retail brokerage capacity for its customers are excluded from the consolidated financial statements since they do not constitute assets of the Corporation. Assets held by the Wealth Management Department amounted to $639.4 million and $518.8 million at December 31, 2023 and 2022, respectively. Income from fiduciary, investment management and brokerage activities are included in other income. Certain amounts in the 2022 consolidated financial statements and notes have been reclassified to conform to the 2023 presentation. The Corporation evaluates subsequent events through the filing of this report with the SEC. Use of Estimates To prepare financial statements in conformity with GAAP management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for credit losses. Cash and Cash Equivalents Cash and cash equivalents include cash on hand, balances due from banks, and federal funds sold, all of which mature within 90 days and interest-bearing deposits with banks. Net cash flows are reported for customer loan and deposit transactions, interest bearing deposits in other financial institutions, and federal funds purchased and repurchase agreements. Interest-bearing deposits in other financial institutions are carried at cost. Investment Securities On January 1, 2023 the Corporation adopted ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, universally referred to as CECL. ASU 2016-13 applies to all financial instruments carried at amortized cost, including HTM securities, and makes targeted improvements to the accounting for credit losses on AFS securities. In addition, Topic 326 amends the accounting for credit losses on certain other debt securities. The Corporation did not record any allowance for credit losses on its debt securities as a result of adopting Topic 326. Equity securities with readily determinable fair values are recorded at fair value with changes in fair value recognized in net income. Debt securities that management has the positive intent and ability to hold to maturity are classified as “held to maturity” and recorded at amortized cost. Debt securities not classified as HTM or trading are classified as “available for sale” and recorded at fair value, with unrealized gains and losses excluded from earnings and reported, net of tax, in other comprehensive income (loss). Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Declines in the fair value of HTM and AFS securities below their cost that are deemed to be impaired are reflected in earnings as realized losses. In relation to HTM securities, any declines in the fair value that are assumed to impair the credit quality of such debt instruments are evaluated and the estimated loss is incorporated into the Banks’ expected credit losses for any given period. In estimating impairment losses on debt securities, management considers (1) whether management intends to sell the security, or (2) if it is more likely than not that management will be required to sell the security before recovery, or (3) if management does not expect to recover the entire amortized cost basis. In assessing potential impairment for equity securities, consideration is given to management’s intention and ability to hold the securities until recovery of unrealized losses. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Transfers of debt securities into the HTM category from the AFS category are made at fair value at the date of transfer. The unrealized holding gain or loss at the date of transfer is retained in other comprehensive income (loss) and in the carrying value of the HTM securities. Such amounts are amortized over the remaining expected life of the security. Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors or current investor yield requirements. Net unrealized losses are recognized through a valuation allowance by charges to income. Mortgage loans held for sale are sold with the mortgage servicing rights released to another financial institution through a correspondent relationship. The correspondent financial institution absorbs all of the risk related to rate lock commitments. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold. Loans The Corporation grants commercial, residential, and consumer loans to customers. A substantial portion of the loan portfolio is represented by commercial real estate and residential mortgage loans throughout southcentral Pennsylvania and northern Maryland. The ability of the Corporation’s debtors to honor their contracts is dependent upon the real estate values and general economic conditions in this area. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge-offs and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. The loans receivable portfolio is segmented into commercial, residential mortgage, home equity lines of credit, and consumer loans. Commercial loans consist of the following classes: commercial and industrial, commercial real estate, and real estate construction. The accrual of interest on commercial loans and residential mortgage is discontinued at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Consumer loans, including home equity lines of credit, are typically charged off no later than 120 days past due. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. Facts and circumstances can arise that cause a loan to be placed on nonaccrual if payment capacity is insufficient. All interest accrued, but not collected, for loans that are placed on nonaccrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Allowance for Credit Losses As mentioned above, in 2023 the Corporation adopted CECL which replaced the incurred loss methodology. The measurement of expected credit losses under CECL is applicable to financial assets measured at amortized cost, including loans, HTM securities and purchased financial assets, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. It also applies to OBS credit exposures, such as loan commitments, standby letters of credit, financial guarantees and other similar instruments. Financial institutions and other organizations will now use forecasted information to better inform their credit loss estimates. Many of the loss estimation techniques applied previously are still permitted, although the inputs to those techniques changed to reflect the full amount of expected credit losses. The Corporation maintains an ACL at a level determined to be adequate to absorb expected credit losses associated with the Corporation’s financial instruments over the life of those instruments as of the balance sheet date. As part of its process of adopting CECL, management implemented a third-party software solution and determined appropriate loan segments, methodologies, model assumptions and qualitative components. The Corporation’s systematic ACL methodology is based on the following portfolio segments: Commercial and Industrial, Commercial Real Estate, Real Estate Construction, Residential Mortgage, Home Equity Lines of Credit and Consumer. The loan portfolio is segmented by loan types that have similar risk characteristics and types of collateral and that behave similarly during economic cycles. The calculation includes both a quantitative and qualitative component which incorporates the forecasting of certain economic variables. The Bank engaged a third-party to assist in developing the CECL model and to assist with evaluation of data and methodologies related to this standard. The Bank’s CECL Committee, which includes members from Credit Administration, Accounting/Finance, Risk Management and Internal Audit, has oversight by the Chief Executive Officer, Chief Financial Officer, and Chief Credit Officer. The Bank’s implementation plan also included the assessment and documentation of appropriate processes, policies and internal controls. Management had a third-party independent consultant review and validate the CECL model. The ultimate impact of adopting Topic 326, and at each subsequent reporting period, is highly dependent on credit quality, macroeconomic forecasts and conditions, composition of the loans and securities portfolio, along with other management judgments. The Corporation adopted Topic 326 using the modified retrospective method. 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. The segmentation in the CECL model is different from the segmentation in the incurred loss model, however there was minimal impact on the presentation of the financial statement disclosures. The following is a discussion of the key risks by portfolio segment that management assesses in preparing the ACL. Commercial Real Estate — The Corporation engages in commercial real estate lending in its primary market and surrounding areas. The portfolio is secured primarily by commercial retail space, office buildings, and hotels. Generally, commercial real estate loans have terms that do not exceed 20 years, have loan-to-value ratios of up to 80% of the appraised value of the property, and are typically secured by personal guarantees of the borrowers. In underwriting these loans, the Corporation performs a thorough analysis of the financial condition of the borrower, the borrower’s credit history, and the reliability and predictability of the cash flow generated by the property securing the loan. Appraisals on properties securing commercial real estate loans originated by the Corporation are performed by independent appraisers. Commercial real estate loans generally present a higher level of risk than other types of loans due primarily to the effect of general economic conditions and the complexities involved in valuing the underlying collateral. Residential Mortgage — One-to-four family residential mortgage loan originations, including home equity closed-end loans, are generated by the Corporation’s marketing efforts, its present customers, walk-in customers, and referrals. These loans originate primarily within the Corporation’s Market Area or with customers primarily from the Market Area. The Corporation offers fixed-rate and adjustable-rate mortgage loans with terms up to a maximum of 30 years for both permanent structures and those under construction. The Corporation’s one-to-four family residential mortgage originations are secured primarily by properties located in its primary Market Area and surrounding areas. The majority of the Corporation’s residential mortgage loans originate with a loan-to-value of 80% or less. Loans in excess of 80% are required to have private mortgage insurance. In underwriting one-to-four family residential real estate loans, the Corporation evaluates both the borrower’s financial ability to repay the loan as agreed and the value of the property securing the loan. Properties securing real estate loans made by the Corporation are appraised by independent appraisers. The Corporation generally requires borrowers to obtain an attorney’s title opinion or title insurance, as well as fire and property insurance (including flood insurance, if necessary) in an amount not less than the amount of the loan. The Corporation has not engaged in subprime residential mortgage originations. Residential mortgage loans are subject to risk due primarily to general economic conditions, as well as periods of weak housing markets. Commercial and Industrial — The Corporation originates commercial and industrial loans primarily to businesses located in its primary Market Area and surrounding areas. These loans are used for various business purposes which include short-term loans and lines of credit to finance machinery and equipment purchases, inventory, and accounts receivable. Generally, the maximum term for loans extended on machinery and equipment is based on the projected useful life of such machinery and equipment. Most business lines of credit are written on demand and may be renewed annually. Commercial and industrial loans are generally secured with short-term assets; however, in many cases, additional collateral such as real estate is provided as additional security for the loan. Loan-to-value maximum values have been established by the Corporation and are specific to the type of collateral. Collateral values may be determined using invoices, inventory reports, accounts receivable aging reports, collateral appraisals, etc. In underwriting commercial and industrial loans, an analysis is performed to evaluate the borrower’s character and capacity to repay the loan, the adequacy of the borrower’s capital and collateral, as well as the conditions affecting the borrower. Evaluation of the borrower’s past, present and future cash flows is also an important aspect of the Corporation’s analysis. Commercial loans generally present a higher level of risk than other types of loans due primarily to the effect of general economic conditions. Home Equity Lines of Credit — The Corporation originates home equity lines of credit primarily within the Corporation’s Market Area or with customers primarily from the Market Area. Home equity lines of credit are generated by the Corporation’s marketing efforts, its present customers, walk-in customers, and referrals. Home equity lines of credit are secured by the borrower’s primary residence with a maximum loan-to-value of 90% and a maximum term of 20 years. In underwriting home equity lines of credit, the Corporation evaluates both the value of the property securing the loan and the borrower’s financial ability to repay the loan as agreed. The ability to repay is determined by the borrower’s employment history, current financial condition, and credit background. Home equity lines of credit generally present a moderate level of risk due primarily to general economic conditions, as well as periods of weak housing markets. Junior liens inherently have more credit risk by virtue of the fact that another financial institution may have a higher security position in the case of foreclosure liquidation of collateral to extinguish the debt. Generally, foreclosure actions could become more prevalent if the real estate markets are weak and property values deteriorate. Real Estate Construction — The Corporation engages in real estate construction lending in its primary market and surrounding areas. The Corporation’s real estate construction lending consists of commercial and residential site development loans, as well as commercial building construction and residential housing construction loans. The Corporation’s real estate construction loans are generally secured with the subject property. Terms of construction loans depend on the specifics of the project, such as estimated absorption rates, estimated time to complete, etc. In underwriting real estate construction loans, the Corporation performs a thorough analysis of the financial condition of the borrower, the borrower’s credit history, and the reliability and predictability of the cash flow generated by the project using feasibility studies, market data, etc. Appraisals on properties securing real estate construction loans originated by the Corporation are performed by independent appraisers. Real estate construction loans generally present a higher level of risk than other types of loans due primarily to the effect of general economic conditions and the uncertainties surrounding total construction costs. Consumer — The Corporation offers a variety of secured and unsecured consumer loans, including those for vehicles and mobile homes and loans secured by savings deposits. These loans originate primarily within the Corporation’s Market Area or with customers primarily from the Market Area. Consumer loan terms vary according to the type and value of collateral and the creditworthiness of the borrower. In underwriting consumer loans, a thorough analysis of the borrower’s financial ability to repay the loan as agreed is performed. The ability to repay is determined by the borrower’s employment history, current financial condition, and credit background. Consumer loans may entail greater credit risk than residential mortgage loans or home equity lines of credit, particularly in the case of consumer loans which are unsecured or are secured by rapidly depreciable assets such as automobiles or recreational equipment. In such cases, any repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment of the outstanding loan balance as a result of the greater likelihood of damage, loss or depreciation. In addition, consumer loan collections are dependent on the borrower’s continuing financial stability, and thus are more likely to be affected by adverse personal circumstances. Furthermore, the application of various federal and state laws, including bankruptcy and insolvency laws, may limit the amount which can be recovered on such loans. The adoption of Topic 326 resulted in a Day 1 adjustment of $3.3 million, including an increase to the ACL of $1.6 million and a $1.6 million reserve on unfunded loan commitments recorded in the liabilities section on the Consolidated Statements of Condition on January 1, 2023. As of January 1, 2023, the Corporation recorded a cumulative effect adjustment of $2.4 million to decrease retained earnings related to the adoption of Topic 326. Upon CECL adoption, the Corporation elected to implement the regulatory agencies’ capital transition relief over the permissible three-year period. The following table illustrates the impact of Topic 326: January 1, 2023 (In thousands) Pre Topic 326 As Reported Under Topic 326 Impact of Topic 326 Adoption Allowance for Credit Losses on Loans: Commercial and industrial $ (2,848) $ (2,086) $ 762 Commercial real estate (10,016) (11,122) (1,106) Real estate construction (1,000) (2,347) (1,347) Residential mortgage (3,029) (3,326) (297) Home equity lines of credit (347) (364) (17) Consumer (376) (234) 142 Unallocated (245) — 245 Allowance for credit losses on loans $ (17,861) $ (19,479) $ (1,618) Assets: Total Loans, net of allowance for credit losses $ 1,520,749 $ 1,519,131 $ 1,618 Net deferred tax asset 17,718 18,452 734 Liabilities: Allowance for unfunded commitments 92 1,735 1,643 Equity: Retained earnings 245,042 242,674 2,368 The ACL represents an amount which, in management’s judgment, is adequate to absorb expected losses on outstanding loans at the balance sheet date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions and prepayment experience. The ACL is measured and recorded upon the initial recognition of a financial asset. The ACL is reduced by charge-offs, net of recoveries of previous losses, and is increased or decreased by a provision for credit losses, which is recorded as a current period operating expense. The Company believes it uses relevant information available to make determinations about the ACL and that it has established the existing allowance in accordance with GAAP. However, the determination of the ACL requires significant judgment and estimates of expected losses in the loan portfolio can vary significantly from the amounts actually observed. While the Company uses available information to recognize expected losses, future additions to the ACL may be necessary based on changes in the loans comprising the portfolio, changes in the current and forecasted economic conditions, changes to the interest rate environment which may directly impact prepayment and curtailment rate assumptions, and/or changes in the financial condition of borrowers. The adoption of CECL did not result in a significant change to any other credit risk management and monitoring processes, including identification of past due or delinquent borrowers, nonaccrual practices or charge-off policies. The Corporation’s methodology for estimating the ACL includes: Segmentation. The Corporation’s loan portfolio is segmented by loan types that have similar risk characteristics and types of collateral and behave similarly during economic cycles. Specific Analysis. A specific reserve analysis is applied to certain individually evaluated loans. These loans are evaluated quarterly generally based on collateral value, observable market value or the present value of expected future cash flows. A specific reserve is established if the fair value is less than the loan balance. A charge-off is recognized when the loss is quantifiable. Quantitative Analysis . The Corporation elected to use Discounted Cash Flow and chose unemployment rate as the driving factor of their economic forecasts. In regards to unemployment rates, the Corporation elected to forecast economic factors over the period of the next four quarters. The Corporation chose not to extend beyond four quarters given the inherent risks associated with forecasting. The Corporation utilizes relevant third-party forecasts as a basis and support for its own forecast. These forecasts are assumed to revert to the long-term average and utilized in the model to estimate the PD and LGD through regression. The Corporation elected a reversion period of four quarters. The Corporation deemed four quarters to be a reasonable time period to ensure it did not include irrelevant information, but also not too short to introduce unnecessary volatility. Model assumptions include, but are not limited to the discount rate, prepayment speeds, funding rates, PD, LGD and curtailments. The product of the PD and the LGD is the estimated loss rate, which varies over time. The estimated loss rate is applied within the appropriate periods in the cash flow model to determine the net present value. Net present value is also impacted by assumptions related to the duration between default and recovery. The reserve is based on the difference between the summation of the principal balances taking amortized costs into consideration and the summation of the net present values. Qualitative Analysis. Based on management’s review and analysis of internal, external and model risks, management may adjust the model output. Management reviews the peaks and troughs of the model’s calibration, considering economic forecasts to develop guardrails that serve as the basis for determining the reasonableness of the model’s output and makes adjustments as necessary. This process challenges unexpected variability resulting from outputs beyond the model’s calibration that appear to be unreasonable. Additionally, management may adjust the economic forecast if it is incompatible with known market conditions based on management’s experience and perspective. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 made certain targeted amendments specific to troubled debt restructurings by creditors and vintage disclosure related to gross write-offs. Upon adoption, the Corporation is required to apply the loan and refinancing and restructuring guidance to determine whether a modification results in a new loan or a continuation of an existing loan, rather than applying the recognition and measurement guidance for TDRs. The ASU also requires companies to disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases within scope of Subtopic 326-20. The Corporation adopted ASU 2022-02 on January 1, 2023. ACL Methodology Before CECL Adoption For the year ended December 31, 2022 and prior, the ACL was established as losses were estimated to occur through a provision for credit losses charged to earnings. Credit losses were charged against the allowance when management believed the uncollectibility of a loan balance was confirmed. Subsequent recoveries, if any, were credited to the ACL. The ACL was evaluated on a regular basis by management and was based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may have affected the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation was inherently subjective as it required estimates that are susceptible to significant revision as more information became available. The ACL consisted of specific, general and unallocated components. The specific component related to loans that were classified as either doubtful, substandard, or special mention. For such loans that were also classified as impaired, an ACL was established when the discounted cash flows (or collateral value or observable market price) of the impaired loan was lower than the carrying value of that loan. The general component covered pools of loans by loan class including commercial loans not considered impaired, as well as smaller balance homogeneous loans, such as residential real estate, home equity, and other consumer loans. These pools of loans were evaluated for loss exposure based upon historical loss rates for each of these categories of loans, adjusted for qualitative risk factors. These qualitative risk factors included: • Lending policies and procedures, including underwriting standards and collection, charge-off and recovery practices; • National, regional and local economic and business conditions, as well as the condition of various market segments, including the impact on the value of underlying collateral for collateral dependent loans; • Nature and volume of the portfolio and terms of loans; • Experience, ability and depth of lending management and staff; • Volume and severity of past due, classified and nonaccrual loans, as well as other loan modifications; and, • Existence and effect of any concentrations of credit and changes in the level of such concentrations. Each factor was assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. Adjustments to the factors were supported through documentation of changes in conditions in a narrative accompanying the ACL calculation. The unallocated component of the ACL was maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the ACL reflected the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. It covered risks that were inherently difficult to quantify including, but not limited to, collateral risk, information risk, and historical charge-off risk. A loan is considered impaired when, based on current information and events, it is probable that the Corporation will be unable to collect the scheduled payments of principal and/or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and/or interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis for commercial and commercial construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral dependent. A specific allocation within the ACL is established for an impaired loan if its carrying value exceeds its estimated fair value. The estimated fair values of the Corporation’s impaired loans are measured based on the estimated fair value of the loan’s collateral or the discounted cash flows method. It is the policy of the Corporation to order an updated valuation on all real estate secured loans when the loan becomes 90 days past due and there has not been an updated valu

RESTRICTIONS ON CASH AND DUE FR

RESTRICTIONS ON CASH AND DUE FROM BANKS	12 Months Ended
	Dec. 31, 2023
Restricted Cash and Investments [Abstract]
RESTRICTIONS ON CASH AND DUE FROM BANKS	RESTRICTIONS ON CASH AND CASH EQUIVALENTS The Corporation is required to maintain cash balances at certain correspondent banks in exchange for services obtained through those banks. At December 31, 2023 and 2022, these balances were included in interest-bearing deposits with banks.

INVESTMENT SECURITIES

INVESTMENT SECURITIES	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	INVESTMENT SECURITIES Fair value of equity securities with readily determinable fair values are as follows: (In thousands) Fair Value at January 1 Purchases Sales/reclassification Gains/(Losses) (Losses)/Gains on sales of securities Fair Value at December 31 2023 CRA Mutual Fund $ 915 $ — $ — $ 13 $ — $ 928 Canapi Ventures SBIC Fund 206 — 206 — — — Stock in other banks 598 — 592 5 (11) — Total $ 1,719 $ — $ 798 $ 18 $ (11) $ 928 2022 CRA Mutual Fund $ 1,036 $ — $ — $ (121) $ — $ 915 Canapi Ventures SBIC Fund — 206 — — — 206 Stock in other banks 1,573 — 811 (177) 13 598 Total $ 2,609 $ 206 $ 811 $ (298) $ 13 $ 1,719 Amortized cost and fair value of debt securities were as follows: (In thousands) Amortized Gross Gross Fair December 31, 2023 Available for Sale U.S. Government and agencies $ 176,458 $ — $ 19,663 $ 156,795 Mortgage-backed securities 293,128 363 28,287 265,204 Corporate bonds 32,326 202 2,834 29,694 Total $ 501,912 $ 565 $ 50,784 $ 451,693 Held to Maturity Mortgage-backed securities $ 2,467 $ — $ 124 $ 2,343 State and municipal 62,133 — 5,419 56,714 Total $ 64,600 $ — $ 5,543 $ 59,057 December 31, 2022 Available for Sale U.S. Government and agencies $ 241,467 $ — $ 30,468 $ 210,999 Mortgage-backed securities 327,535 342 32,159 295,718 State and municipal 15,235 196 196 15,235 Corporate bonds 33,404 15 1,817 31,602 Total $ 617,641 $ 553 $ 64,640 $ 553,554 Held to Maturity Mortgage-backed securities $ 3,279 $ — $ 194 $ 3,085 State and municipal 61,698 — 6,705 54,993 Total $ 64,977 $ — $ 6,899 $ 58,078 The following table shows the gross unrealized and estimated fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2023 and 2022: Less than 12 Months 12 Months or More Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2023 Available for Sale U.S. Government and agencies $ — $ — $ 156,795 $ 19,663 $ 156,795 $ 19,663 Mortgage-backed securities — — 230,443 28,287 230,443 28,287 Corporate bonds — — 15,279 2,834 15,279 2,834 Total $ — $ — $ 402,517 $ 50,784 $ 402,517 $ 50,784 Held to Maturity Mortgage-backed securities $ — $ — $ 2,343 $ 124 $ 2,343 $ 124 State and municipal — — 56,714 5,419 56,714 5,419 Total $ — $ — $ 59,057 $ 5,543 $ 59,057 $ 5,543 December 31, 2022 Available for Sale U.S. Government and agencies $ 25,426 $ 1,461 $ 185,573 $ 29,007 $ 210,999 $ 30,468 Mortgage-backed securities 221,249 19,362 63,145 12,797 284,394 32,159 State and municipal 6,229 196 — — 6,229 196 Corporate bonds 24,337 1,217 5,250 600 29,587 1,817 Total $ 277,241 $ 22,236 $ 253,968 $ 42,404 $ 531,209 $ 64,640 Held to Maturity Mortgage-backed securities $ 3,085 $ 194 $ — $ — $ 3,085 $ 194 State and municipal 38,086 3,875 16,907 2,830 54,993 6,705 Total $ 41,171 $ 4,069 $ 16,907 $ 2,830 $ 58,078 $ 6,899 All mortgage-backed security investments are government sponsored enterprise pass-through instruments issued by the Federal National Mortgage Association, Government National Mortgage Association or Federal Home Loan Mortgage Corporation, which guarantee the timely payment of principal on these investments. The Company evaluates AFS debt securities for expected credit losses in unrealized loss positions at each measurement date to determine whether the decline in the fair value below the amortized cost basis is due to credit-related factors or noncredit-related factors. In estimating credit events which may lead to an ACL on debt securities, management considers whether it intends to sell the security, or if it is more likely than not that it will be required to sell the security before recovery, or if it does not expect to recover the entire amortized cost basis. Amortized cost and fair value at December 31, 2023, by contractual maturity, where applicable, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay with or without penalties. Available for Sale Held to Maturity (In thousands) Amortized Fair Amortized Fair 1 year or less $ 15,664 $ 15,178 $ — $ — Over 1 year through 5 years 109,772 99,591 1,394 1,299 Over 5 years through 10 years 81,348 70,242 25,391 23,807 Over 10 years 2,000 1,478 35,348 31,608 Mortgage-backed securities 293,128 265,204 2,467 2,343 $ 501,912 $ 451,693 $ 64,600 $ 59,057 The Corporation reassessed classification of certain investments and effective April 1, 2022, the Corporation transferred $39.7 million of state and municipal securities from AFS to HTM securities. The transfer occurred at fair value. The related unrealized loss of $4.8 million included in other comprehensive loss remained in other comprehensive loss, to be amortized out of other comprehensive loss with an offsetting entry to interest income as a yield adjustment over the remaining term of the securities. No gain or loss was recorded at the time of transfer. During 2022, the Corporation enacted a sale of certain amortizing securities designated as HTM under the standards set forth in ASC Topic 320, Investments - Debt Securities . It was determined that the combination of scheduled, equal installments, principal prepayments on such securities had resulted in the collection of more than eighty-five percent of the principal outstanding at acquisition, and the non-recurrence of the event to enact a sale of such securities. The proceeds from sales of securities and the associated gains and losses are listed below: Years Ended December 31, (In thousands) 2023 2022 Proceeds $ 125,241 $ 4,994 Gross gains 230 14 Gross losses 5,470 248 At December 31, 2023 and 2022, securities with a carrying value of $233.7 million and $342.2 million, respectively, were pledged as collateral as required by law on public and trust deposits, repurchase agreements, and for other purposes.

LOANS AND ALLOWANCE FOR CREDIT

LOANS AND ALLOWANCE FOR CREDIT LOSSES	12 Months Ended
	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
LOANS AND ALLOWANCE FOR CREDIT LOSSES	LOANS AND ALLOWANCE FOR CREDIT LOSSES The composition of the loan portfolio as of December 31: (In thousands) 2023 2022 Commercial real estate $ 898,709 $ 824,111 Residential mortgage 394,189 361,905 Commercial and industrial 152,344 180,958 Home equity lines of credit 90,163 83,463 Real estate construction 84,341 80,491 Consumer 9,954 11,336 Gross loans 1,629,700 1,542,264 Unearned income (1,712) (3,654) Total loans, net of unearned income $ 1,627,988 $ 1,538,610 The Bank has granted loans to certain of its executive officers, directors and their related interests. These loans were made on substantially the same basis, including interest rates and collateral as those prevailing for comparable transactions with other borrowers at the same time. None of these loans were past due, in nonaccrual status, or restructured at December 31, 2023. Following is a summary of the activity for these related-party loans: (In thousands) 2023 Balance at January 1 $ 5,950 New loans (1) 344 Repayments (1) 987 Balance at December 31 $ 5,307 ———————————————— (1) Includes one additional loan and the removal of one loan due to changes in executive management and directors. One of the factors used to monitor the performance and credit quality of the loan portfolio is to analyze the age of the loans receivable as determined by the length of time a recorded payment is past due. The following tables present the classes of the loan portfolio summarized by the past due status: (In thousands) 30–59 Days Past Due 60–89 Days >90 Days Total Past Current Total Loans Loans December 31, 2023 Commercial real estate $ 150 $ 347 $ — $ 497 $ 898,212 $ 898,709 $ — Residential mortgage 1,293 388 849 2,530 391,659 394,189 505 Commercial and industrial 50 — 159 209 152,135 152,344 — Home equity lines of credit 414 — 654 1,068 89,095 90,163 654 Real estate construction 12 — — 12 84,329 84,341 — Consumer 8 — 3 11 9,943 9,954 3 Total Loans $ 1,927 $ 735 $ 1,665 $ 4,327 $ 1,625,373 $ 1,629,700 $ 1,162 (In thousands) 30–59 Days Past Due 60–89 Days >90 Days Total Past Current Total Loans Loans December 31, 2022 Commercial real estate $ 2,026 $ 350 $ 255 $ 2,631 $ 821,480 $ 824,111 $ — Residential mortgage 2,969 970 705 4,644 357,261 361,905 705 Commercial and industrial 287 — 162 449 180,509 180,958 — Home equity lines of credit 438 117 498 1,053 82,410 83,463 498 Real estate construction 24 — — 24 80,467 80,491 — Consumer 155 80 — 235 11,101 11,336 — Total Loans $ 5,899 $ 1,517 $ 1,620 $ 9,036 $ 1,533,228 $ 1,542,264 $ 1,203 Allowance for Credit Losses, effective January 1, 2023 As discussed in Note 1, “Summary of Significant Account Polices,” the Corporation adopted CECL effective January 1, 2023. CECL requires estimated credit losses on loans to be determined based on an expected life of loan model, as compared to an incurred loss model, which was in effect for periods prior to 2023. Accordingly, ACL disclosures subsequent to January 1, 2023 are not always comparable to prior periods. In addition, certain new disclosures required under CECL are not applicable to prior periods. As a result, the tables in this disclosure present separately for each period, where appropriate. Under CECL, loans individually evaluated consist of nonaccrual loans. Under the incurred loss model in effect prior to the adoption of CECL, loans evaluated individually for impairment were referred to as impaired loans. The following table presents nonaccrual loans: December 31, 2023 December 31, 2022 (In thousands) With a Related Allowance Without a Related Allowance Total Total Commercial real estate $ 315 $ 1,164 $ 1,479 $ 1,873 Residential mortgage — 343 343 — Commercial and industrial 1,004 — 1,004 781 Home equity lines of credit — 185 185 — $ 1,319 $ 1,692 $ 3,011 $ 2,654 No additional funds are committed to be advanced in connection with individually evaluated loans. If interest on all nonaccrual loans had been accrued at original contract rates, interest income would have increased by $302 thousand in 2023 and $410 thousand in 2022. One accruing TDR was included in the table above as of December 31, 2022. That loan was moved to performing status during 2023 due to its loan repayment history . Total nonperforming loans at December 31 are as follows: (In thousands) 2023 2022 Nonaccrual loans $ 3,011 $ 2,654 Greater than 90 days past due and still accruing 1,162 1,203 Total nonperforming loans $ 4,173 $ 3,857 Loan Modifications On January 1, 2023, the Corporation adopted the accounting guidance in ASU 2022-02, which eliminated the recognition and measurement of TDRs. Due to the removal of the TDR designation, the Corporation evaluates all loan restructurings according to the accounting guidance for loan modifications to determine if the restructuring results in a new loan or a continuation of the existing loan. Loan modifications to borrowers experiencing financial difficulty that result in a direct change in the timing or amount of contractual cash flows include situations where there is principal forgiveness, interest rate reductions, other-than-insignificant payment delays, term extensions, and combinations of the above. Therefore, the disclosures related to loan restructurings are only for modifications that directly affect cash flows. Loans modified as of December 31, 2023 were as follows: (In thousands) Term Extension % of Total Class of Financing Receivable Commercial and industrial $ 549 0.4 % As of December 31, 2023, the Corporation had no commitments to lend any additional funds on modified loans. There were no loans that defaulted during the period that had been modified preceding the payment default when the borrower was experiencing financial difficulty at the time of modification. For purposes of this disclosure, a default occurs when, within 12 months of the original modification, either a full or partial charge-off occurs or the loan becomes 90 days or more past due. Collateral-Dependent Loans A loan is considered to be collateral-dependent when the debtor is experiencing financial difficulty and repayment is expected to be provided substantially through the sale or operation of the collateral. For all classes of loans deemed collateral-dependent, the Corporation elected the practical expedient to estimate expected credit losses based on the collateral’s fair value less cost to sell. In most cases, the Corporation records a partial charge-off to reduce the collateral-dependent loan’s carrying value to the collateral’s fair value less cost to sell. Substantially all of the collateral supporting collateral-dependent loans consists of various types of real estate, including residential properties, commercial properties, such as retail centers, office buildings, and lodging, agriculture land, and vacant land. The following table presents the amortized cost basis of individually evaluated loans as of December 31, 2023. Changes in the fair value of the collateral for individually evaluated loans are reported as provision for credit losses or a reversal of provision for credit losses in the period of change. December 31, 2023 Type of Collateral (In thousands) Business Assets Real Estate Commercial real estate $ — $ 1,479 Residential mortgage — 343 Commercial and industrial 1,004 — Home equity lines of credit — 185 Total $ 1,004 $ 2,007 Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process at December 31, 2023 and December 31, 2022, totaled $1.3 million and $1.1 million, respectively. Allowance for Credit Losses The Corporation maintains an ACL at a level determined to be adequate to absorb expected credit losses associated with the Corporation’s financial instruments over the life of those instruments as of the balance sheet date. The Corporation’s systematic ACL methodology is based on the following portfolio segments: commercial real estate, residential mortgage, commercial and industrial, home equity lines of credit, real estate construction and consumer. The Corporation’s loan portfolio is segmented by loan types that have similar risk characteristics, type of collateral and behave similarly during economic cycles. The segmentation in the CECL model is different from the segmentation in the incurred loss model, however there was minimal impact on the presentation of the financial statement disclosures. See Note 1 “Summary of Significant Accounting Policies” for discussion of the key risks by portfolio segment that management assesses in preparing the ACL. The Bank considers the performance of the loan portfolio and its impact on the ACL. The Bank does not assign internal risk ratings to smaller balance, homogeneous loans such as certain residential mortgage, home equity lines of credit, construction loans to individuals secured by residential real estate and consumer loans. For these loans, the Bank evaluates credit quality based on the aging status of the loan and designates as performing and nonperforming. The following summarizes designated internal risk categories by portfolio segment for loans that the Bank assigns a risk rating and those that Bank evaluates based on the performance status: December 31, 2023 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis (In thousands) 2023 2022 2021 2020 2019 Prior Total Internally Risk Rated: Commercial real estate Pass $ 136,158 $ 152,767 $ 130,994 $ 60,918 $ 65,856 $ 287,026 $ 13,636 $ 847,355 Special Mention 1,927 6,385 5,920 1,904 8,222 16,244 1,994 42,596 Substandard — — — 1,530 704 6,524 — 8,758 Total Commercial real estate $ 138,085 $ 159,152 $ 136,914 $ 64,352 $ 74,782 $ 309,794 $ 15,630 $ 898,709 Residential mortgage Pass $ 39,146 $ 27,612 $ 41,031 $ 14,758 $ 10,492 $ 27,274 $ 402 $ 160,715 Special Mention 588 82 593 397 826 2,457 62 5,005 Substandard — — — — — 218 — 218 Total Residential Mortgage $ 39,734 $ 27,694 $ 41,624 $ 15,155 $ 11,318 $ 29,949 $ 464 $ 165,938 Commercial and industrial Pass $ 12,319 $ 24,259 $ 34,830 $ 15,614 $ 13,922 $ 17,780 $ 25,147 $ 143,871 Special Mention 128 303 290 529 140 459 2,014 3,863 Substandard 7 135 499 91 9 1,597 2,272 4,610 Total Commercial and industrial $ 12,454 $ 24,697 $ 35,619 $ 16,234 $ 14,071 $ 19,836 $ 29,433 $ 152,344 Year-to-date gross charge-offs $ — $ — $ — $ — $ — $ 110 $ — $ 110 Real estate construction Pass $ 19,766 $ 39,758 $ 3,953 $ 1,160 $ — $ 2,604 $ 8,003 $ 75,244 Special Mention — 465 — 92 — 725 — 1,282 Substandard — — — — — 69 — 69 Total Real estate construction $ 19,766 $ 40,223 $ 3,953 $ 1,252 $ — $ 3,398 $ 8,003 $ 76,595 Home equity lines of credit Pass $ 300 $ 99 $ — $ — $ — $ 131 $ 5,235 $ 5,765 Special Mention — — — — — — 727 727 Substandard — — — — — 362 — 362 Total Home equity lines of credit $ 300 $ 99 $ — $ — $ — $ 493 $ 5,962 $ 6,854 Performance Rated: Residential mortgage Performing $ 33,884 $ 45,221 $ 14,878 $ 16,184 $ 9,059 $ 108,021 $ 156 $ 227,403 Nonperforming — — — — — 848 — 848 Total Residential Mortgage $ 33,884 $ 45,221 $ 14,878 $ 16,184 $ 9,059 $ 108,869 $ 156 $ 228,251 Home equity lines of credit Performing $ 23 $ 38 $ — $ 13 $ 94 $ 4,742 $ 77,745 $ 82,655 Nonperforming — — — — — 92 562 654 Total Home equity lines of credit $ 23 $ 38 $ — $ 13 $ 94 $ 4,834 $ 78,307 $ 83,309 Consumer Performing $ 2,351 $ 2,685 $ 778 $ 522 $ 271 $ 1,085 $ 2,259 $ 9,951 Nonperforming — — — — — — 3 3 Total Consumer $ 2,351 $ 2,685 $ 778 $ 522 $ 271 $ 1,085 $ 2,262 $ 9,954 Year-to-date gross charge-offs $ 48 $ 83 $ 42 $ 55 $ 23 $ 78 $ 67 $ 396 Real estate construction Performing $ 5,571 $ 753 $ 175 $ 210 $ 170 $ 867 $ — $ 7,746 Total Real estate construction $ 5,571 $ 753 $ 175 $ 210 $ 170 $ 867 $ — $ 7,746 Total Portfolio loans Pass $ 207,689 $ 244,495 $ 210,808 $ 92,450 $ 90,270 $ 334,815 $ 52,423 $ 1,232,950 Special Mention 2,643 7,235 6,803 2,922 9,188 19,885 4,797 53,473 Substandard 7 135 499 1,621 713 8,770 2,272 14,017 Performing 41,829 48,697 15,831 16,929 9,594 114,715 80,160 327,755 Nonperforming — — — — — 940 565 1,505 Total Portfolio loans $ 252,168 $ 300,562 $ 233,941 $ 113,922 $ 109,765 $ 479,125 $ 140,217 $ 1,629,700 Year-to-date gross charge-offs $ 48 $ 83 $ 42 $ 55 $ 23 $ 188 $ 67 $ 506 The information presented in the preceding table is not required to be disclosed for periods prior to the adoption of CECL. The following table presents the most comparable required information, the recorded investment in loan classes by internally assigned risk ratings and loan classes by performing and nonperforming status as of December 31, 2022: (In thousands) Commercial Commercial Real Estate Residential Home Equity Consumer Total December 31, 2022 Pass $ 175,633 $ 789,017 $ 78,673 $ 355,888 $ 82,366 $ 11,336 $ 1,492,913 Special Mention 4,035 29,540 1,818 5,803 712 — 41,908 Substandard 1,290 5,554 — 214 385 — 7,443 Total Portfolio Loans $ 180,958 $ 824,111 $ 80,491 $ 361,905 $ 83,463 $ 11,336 $ 1,542,264 Performing Loans $ 180,177 $ 822,238 $ 80,491 $ 361,200 $ 82,965 $ 11,336 $ 1,538,407 Nonperforming Loans 781 1,873 — 705 498 — 3,857 Total Portfolio Loans $ 180,958 $ 824,111 $ 80,491 $ 361,905 $ 83,463 $ 11,336 $ 1,542,264 The following table summarizes the allowance for credit losses by loan portfolio class for the year ended December 31, 2023: (In thousands) Commercial Commercial Real Estate Residential Home Equity Consumer Unallocated Total Allowance for Credit Losses Beginning balance - January 1, 2023 $ 2,848 $ 10,016 $ 1,000 $ 3,029 $ 347 $ 376 $ 245 $ 17,861 Impact of CECL adoption (762) 1,106 1,347 297 17 (142) (245) 1,618 Charge-offs (110) — — — — (396) — (506) Recoveries 64 — — — — 72 — 136 Provisions (credits) 8 888 (277) (23) 33 231 — 860 Ending balance - December 31, 2023 $ 2,048 $ 12,010 $ 2,070 $ 3,303 $ 397 $ 141 $ — $ 19,969 The following table summarizes the allowance for loan losses by loan portfolio class for the year ended December 31, 2022: (In thousands) Commercial Commercial Real Estate Residential Home Equity Consumer Unallocated Total Allowance for Loan Losses Beginning balance - January 1, 2022 $ 3,176 $ 10,716 $ 616 $ 3,235 $ 501 $ 408 $ 381 $ 19,033 Charge-offs (238) (831) — (3) (33) (181) — (1,286) Recoveries 58 — — 5 22 29 — 114 Provisions (credits) (148) 131 384 (208) (143) 120 (136) — Ending balance - December 31, 2022 $ 2,848 $ 10,016 $ 1,000 $ 3,029 $ 347 $ 376 $ 245 $ 17,861 The following summarizes information relative to individually evaluated loans by loan portfolio class as of December 31, 2022: Individually Evaluated Loans with Allowance Individually Evaluated Loans with (In thousands) Recorded Unpaid Related Recorded Unpaid December 31, 2022 Commercial and industrial $ 781 $ 781 $ 628 $ — $ — Commercial real estate 350 350 192 4,984 4,984 Total $ 1,131 $ 1,131 $ 820 $ 4,984 $ 4,984 The following summarizes information in regards to the average of individually evaluated loans and related interest income by loan portfolio class as of December 31, 2022: Individually Evaluated Loans with Individually Evaluated Loans with (In thousands) Average Interest Average Interest December 31, 2022 Commercial and industrial $ 991 $ — $ 2 $ — Commercial real estate 856 — 5,566 589 Total $ 1,847 $ — $ 5,568 $ 589

PREMISES AND EQUIPMENT

PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
PREMISES AND EQUIPMENT	PREMISES AND EQUIPMENT Premises and equipment were as follows at December 31: (In thousands) 2023 2022 Land $ 5,418 $ 5,418 Buildings and improvements 33,249 32,515 Furniture and equipment 14,813 14,598 Construction in process 81 8 Total premises and equipment 53,561 52,539 Accumulated depreciation (27,278) (25,486) Premises and equipment, net $ 26,283 $ 27,053 Depreciation expense was $1.9 million and $2.3 million for the years ended December 31, 2023 and 2022, respectively.

INVESTMENTS IN LOW-INCOME HOUSI

INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS	12 Months Ended
	Dec. 31, 2023
Real Estate Partnership Investment Subsidiaries, Net Income (Loss) before Tax [Abstract]
INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS	INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPSACNB Corporation is a limited partner in two partnerships, whose purpose is to develop, manage and operate residential low-income properties. At December 31, 2023 and 2022, the carrying value of these investments was $1.0 million and $1.1 million, respectively. In December 2022, ACNB Corporation sold one limited partnership resulting in a $421 thousand gain.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
LEASES	LEASES The Corporation enters into noncancellable lease arrangements primarily for some of its community banking offices. Certain lease arrangements contain clauses requiring increasing rental payments over the lease term, which are generally contractually stipulated. Many of these lease arrangements provide the Corporation with the option to renew the lease arrangement after the initial lease term. These options are included in determining the lease term used to establish the right-of-use assets and lease liabilities, when it is reasonably certain the Corporation will exercise its renewal option. As most of the Corporation’s leases do not have a readily determinable implicit rate, the incremental borrowing rate is primarily used to determine the discount rate for purposes of measuring the right-of-use assets and lease liabilities. The Corporation’s lease arrangements do not contain any material residual value guarantees or material restrictive covenants. The following ROU assets and lease liabilities are reported within the Consolidated Statements of Condition as follows: (In thousands) December 31, 2023 December 31, 2022 Operating Leases: ROU assets $ 2,615 $ 3,162 Lease liabilities 2,615 3,162 Weighted average remaining lease term 4.7 years 5.0 years Weighted average discount rate 5.61 % 5.42 % Supplemental cash flow information related to operating leases for the years ended December 31: (In thousands) 2023 2022 Operating cash flows from operating leases $ 924 $ 964 As of December 31, 2023, the Corporation did not have any significant additional operating or finance leases that had not yet commenced. The following summarizes the remaining scheduled future minimum lease payments for operating leases as of December 31, 2023: Year (In thousands) 2024 $ 827 2025 785 2026 632 2027 428 2028 393 Thereafter 367 Total minimum lease payments 3,432 Less: amount representing interest (1) 817 Present value of net minimum lease payments $ 2,615 _______________________________ (1) Amount necessary to reduce net minimum lease payments to present value calculated at the Corporation’s incremental borrowing rate.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2023
Business Combinations [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS Goodwill totaled $44.2 million as of both December 31, 2023 and 2022. There were no goodwill impairment charges in 2023 based on the annual goodwill assessment. On February 28, 2022, ACNB Insurance Services, Inc. completed its acquisition of Hockley & O’Donnell of Gettysburg, Pennsylvania. The purchase price was $7.8 million and was funded with all cash and no additional contingent payments were required. The acquisition of Hockley & O’Donnell resulted in goodwill of approximately $2.1 million and generated $5.7 million in customer list and non-compete covenants intangible assets. Goodwill, which has an indefinite useful life, is evaluated for impairment annually or more frequently if events and circumstances indicate that the asset might be impaired. The Corporation did not identify any goodwill impairment on ACNB Insurance Services, Inc. or the Bank’s outstanding goodwill from its most recent testing. There were no impairment losses or accumulated impairment losses associated with goodwill as of December 31, 2023 and 2022. The carrying value and accumulated amortization of the intangible assets and core deposit intangibles are as follows: 2023 2022 (Dollars in thousands) Gross Accumulated Amortization Gross Accumulated Amortization ACNB Insurance Services - amortizing intangible assets $ 16,331 $ 8,956 $ 16,151 $ 8,177 Core deposit intangibles 5,978 4,271 5,978 3,620 $ 22,309 $ 13,227 $ 22,129 $ 11,797 Amortization expense was $1.4 million and $1.5 million for the years ended December 31, 2023 and 2022, respectively. The following table shows the amortization expense of the intangible assets for future periods: Year (in thousands) 2024 $ 1,244 2025 1,115 2026 1,004 2027 857 2028 711 Thereafter 4,151 $ 9,082

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2023
Interest-Bearing Deposit Liabilities [Abstract]
DEPOSITS	DEPOSITS Deposits were comprised of the following as of December 31: (In thousands) 2023 2022 Noninterest-bearing demand deposits $ 500,332 $ 595,049 Interest-bearing demand deposits 524,289 592,586 Money market 264,907 310,911 Savings 340,134 407,299 Total demand and savings 1,629,662 1,905,845 Time 232,151 293,130 Total deposits $ 1,861,813 $ 2,198,975 Scheduled maturities of time certificates of deposit at December 31, 2023, were as follows ( in thousands ): Time Deposits Year Less than $250,000 $250,000 or more 2024 $ 145,891 $ 39,351 2025 30,168 3,780 2026 6,643 254 2027 4,322 — 2028 1,726 — Thereafter 16 — $ 188,766 $ 43,385

BORROWINGS

BORROWINGS	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
BORROWINGS	BORROWINGS Short-term borrowings and weighted-average interest rates at December 31 are as follows: 2023 2022 (Dollars in thousands) Amount Rate Amount Rate Securities sold under repurchase agreements $ 26,882 0.15 % $ 41,954 0.12 % FHLB Advances 30,000 5.64 — — Total $ 56,882 3.05 % $ 41,954 0.12 % Borrowings with original maturities of one year or less are classified as short-term. Securities sold under repurchase agreements are comprised of customer repurchase agreements, which are sweep accounts with next-day maturities utilized by larger commercial customers to earn interest on their funds. Securities are pledged to these customers in an amount at least equal to the outstanding balance. Under an agreement with the FHLB, the Bank has short-term borrowing capacity included within its maximum borrowing capacity. All FHLB advances are collateralized by a security agreement covering qualifying loans. In addition, all FHLB advances are secured by the FHLB capital stock owned by the Bank having a par value of $9.4 million at December 31, 2023. The Bank also has lines of credit that total $192.0 million with correspondent banks for overnight federal funds borrowings. There were no advances on these lines at December 31, 2023 and 2022. A summary of long-term borrowings and their weighted-average contractual rates as of December 31 is as follows: 2023 2022 (Dollars in thousands) Amount Rate Amount Rate FHLB fixed-rate advances maturing: 2026 $ 80,000 4.71 % $ — — % 2027 60,000 4.64 — — 2028 35,000 4.23 — — Trust preferred subordinated debt 5,292 7.28 6,000 3.21 Subordinated debt 15,000 4.00 15,000 4.00 $ 195,292 4.62 % $ 21,000 3.78 % The long-term FHLB advances are collateralized by the assets defined in the security agreement and FHLB capital stock described previously. Based on this collateral and ACNB’s holding of FHLB stock, ACNB is eligible to borrow up to $867.2 million, of which $661.7 million was available at December 31, 2023. The trust preferred subordinated debt is comprised of debt securities issued by FCBI in December 2006 and assumed by ACNB Corporation through the acquisition of FCBI. FCBI completed the private placement of an aggregate of $6.0 million of trust preferred securities. The interest rate on the subordinated debentures is adjusted quarterly to 163 basis points over three-month SOFR. On December 15, 2023 the most recent interest rate reset date, the interest rate was adjusted to 7.28% for the period ending March 14, 2024. The trust preferred securities mature on December 15, 2036, and may be redeemed at par, at the Corporation’s option, on any interest payment date. The trust preferred subordinated debt is considered Tier 1 capital for the consolidated capital ratios. On March 30, 2021, ACNB entered into Subordinated Note Purchase Agreements with certain Purchasers pursuant to which the Corporation sold and issued $15.0 million in aggregate principal amount of its 4.00% fixed-to-floating rate subordinated notes due March 31, 2031. The Subordinated Notes bear interest at a fixed rate of 4.00% per year, from and including March 30, 2021 to, but excluding, March 31, 2026 or earlier redemption date. From and including March 31, 2026 to, but excluding the maturity date or earlier redemption date, the interest rate will reset quarterly at a variable rate equal to the then current 90-day average SOFR plus 329 basis points. As provided in the Subordinated Notes, the interest rate on the Subordinated Notes during the applicable floating rate period may be determined based on a rate other than the 90-day average SOFR. The Subordinated Notes were issued by the Corporation to the Purchasers at a price equal to 100% of their face amount. The Subordinated Notes have a stated maturity of March 31, 2031, are redeemable by the Corporation at its option, in whole or in part, on or after March 30, 2026, and at any time upon the occurrences of certain events. The subordinated debt is considered Tier 2 capital for the consolidated capital ratios.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS Fair value is the exchange price that would be received to sell the asset or transfer the liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. Fair value measurement establishes a fair value hierarchy that prioritizes the inputs to valuation methods used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 - Quoted prices for similar assets or liabilities in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability. Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). An asset or liability’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The following tables present assets measured at fair value and the basis of measurement used at December 31: 2023 (In thousands) Basis Level 1 Level 2 Level 3 Total Equity securities with readily determinable fair values Recurring $ 928 $ — $ — $ 928 AFS Investment Securities: U.S. Government and agencies — 156,795 — 156,795 Mortgage-backed securities — 265,204 — 265,204 Corporate bonds — 29,694 — 29,694 Total AFS Investment Securities Recurring — 451,693 — 451,693 Loans held for sale Recurring — 280 — 280 Individually evaluated loans Non-recurring — — 242 242 Foreclosed assets held for resale Non-recurring — — 467 467 2022 (In thousands) Basis Level 1 Level 2 Level 3 Total Equity securities with readily determinable fair values Recurring $ 1,719 $ — $ — $ 1,719 AFS Investment Securities: U.S. Government and agencies — 210,999 — 210,999 Mortgage-backed securities — 295,718 — 295,718 State and municipal — 15,235 — 15,235 Corporate bonds — 31,602 — 31,602 Total AFS Investment Securities Recurring — 553,554 — 553,554 Loans held for sale Recurring — 123 — 123 Individually evaluated loans Non-recurring — — 3,773 3,773 Foreclosed assets held for resale Non-recurring — — 474 474 The valuation techniques used to measure fair value for the items in the preceding tables are as follows: Equity securities - The fair value of equity securities with readily determinable fair values is recorded on the Consolidated Balance Sheet, with realized and unrealized gains and losses reported in other expense on the Consolidated Statements of Income. Available for sale investment securities – Included in this asset category are debt securities. Level 2 investment securities are valued by a third-party pricing service. The pricing service uses pricing models that vary based on asset class and incorporate available market information, including quoted prices of investment securities with similar characteristics. Because many fixed income securities do not trade on a daily basis, pricing models use available information, as applicable, through processes such as benchmark yield curves, benchmarking of like securities, sector groupings and matrix pricing. Standard market inputs include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data, including market research publications. For certain security types, additional inputs may be used, or some of the standard market inputs may not be applicable. • U.S. Government and agencies – These debt securities are classified as Level 2. Fair values are determined by a third-party pricing service, as detailed above. • Mortgage-backed/State and municipal securities – These debt securities are classified as Level 2. Fair values are determined by a third-party pricing service, as detailed above. • Corporate bonds – This category consists of subordinated and senior debt issued by financial institutions and are classified as Level 2 investments. The fair values for these corporate debt securities are determined by a third-party pricing service, as detailed above. Loans held for sale – This category includes mortgage loans held for sale that are measured at fair value. Fair values as of December 31, 2023 and 2022, were measured as the price that secondary market investors were offering for loans with similar characteristics. See “Note 1 - Summary of Significant Accounting Policies” for details related to the Corporation’s election to measure assets and liabilities at fair value. Individually evaluated loans – This category consists of loans that were individually evaluated for impairment and have a specific reserve. They are classified as Level 3 assets. Foreclosed assets held for resale – This category consists of foreclosed assets that are held for resale and classified as Level 3 assets, for which the fair values were based on estimated selling prices less estimated selling costs for similar assets in active markets. The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value as of December 31: (Dollars in thousands) Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average 2023 Individually evaluated loans $ 242 Appraisal of collateral (1) Appraisal adjustments (2) (33)%–(100)% (94) % 2022 Individually evaluated loans $ 3,773 Appraisal of collateral (1) Appraisal adjustments (2) (10)%–(50)% (48) % _______________________________ (1) Fair value is generally determined through management’s estimate or independent third-party appraisals of the underlying collateral, which generally includes various Level 3 inputs which are not observable. (2) Appraisals may be adjusted downward by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percentage of the appraisal. Higher downward adjustments are caused by negative changes to the collateral or conditions in the real estate market, actual offers or sales contracts received, and/or age of the appraisal . The following information should not be interpreted as an estimate of the fair value of the entire Corporation since a fair value calculation is only provided for a limited portion of the Corporation’s assets and liabilities. Due to a wide range of valuation techniques and the degree of subjectivity used in making the estimates, comparisons between the Corporation’s disclosures and those of other companies may not be meaningful. The following tables present the carrying amount and the estimated fair value of the Corporation’s financial instruments as of December 31: 2023 Estimated Fair Value (In thousands) Carrying Amount Total Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 21,442 $ 21,442 $ 7,063 $ 14,379 $ — Interest-bearing deposits with banks 44,516 44,516 44,516 — — Equity securities with readily determinable fair values 928 928 928 — — Investment securities available for sale 451,693 451,693 — 451,693 — Investment securities held to maturity 64,600 59,057 — 59,057 — Loans held for sale 280 280 — 280 — Loans, net 1,608,019 1,562,703 — — 1,562,703 Accrued interest receivable 8,080 8,080 — 8,080 — Restricted investment in bank stocks 9,677 9,677 — 9,677 — Financial liabilities: Demand deposits, savings, and money markets 1,629,662 1,391,709 — 1,391,709 — Time deposits 232,151 221,770 — 221,770 — Securities sold under repurchase agreements 26,882 23,666 — 23,666 — FHLB Advances 205,000 206,950 — 206,950 — Trust preferred and subordinated debt 20,292 16,992 — 16,992 — Accrued interest payable 794 794 — 794 — 2022 Estimated Fair Value (In thousands) Carrying Amount Total Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $40,067 $40,067 $6,977 $33,090 $— Interest-bearing deposits with banks 128,094 128,094 128,094 — — Equity securities with readily determinable fair values 1,719 1,719 1,719 — — Investment securities available for sale 553,554 553,554 — 553,554 — Investment securities held to maturity 64,977 58,078 — 58,078 — Loans held for sale 123 123 — 123 — Loans, net 1,520,749 1,458,556 — — 1,458,556 Accrued interest receivable 6,915 6,915 — 6,915 — Restricted investment in bank stocks 1,629 1,629 — 1,629 — Financial liabilities: Demand deposits, savings, and money markets 1,905,845 1,905,845 — 1,905,845 — Time deposits 293,130 276,182 — 276,182 — Securities sold under repurchase agreements 41,954 41,954 — 41,954 — Trust preferred and subordinated debt 21,000 18,648 — 18,648 — Accrued interest payable 51 51 — 51 — Management uses its best judgment in estimating the fair value of the Corporation’s financial instruments; however, there are inherent weaknesses in any estimation technique. Therefore, for substantially all financial instruments, the fair value estimates herein are not necessarily indicative of the amounts the Corporation could have realized in a sales transaction on the dates indicated. The estimated fair value amounts have been measured as of their respective reporting dates and have not been reevaluated or updated for purposes of these consolidated financial statements subsequent to those respective dates. As such, the estimated fair values of these financial instruments subsequent to the respective reporting dates may be different than the amounts reported at each period end.

RETIREMENT PLANS

RETIREMENT PLANS	12 Months Ended
	Dec. 31, 2023
Postemployment Benefits [Abstract]
RETIREMENT PLANS	RETIREMENT PLANS Defined-Contribution 401(k) Retirement Plans The Bank maintains a 401(k) retirement plan for the benefit of eligible employees. The plan allows employees to contribute up to 100% of their compensation subject to certain limits based on federal tax laws. The plan also provides for the Bank to match 100% of the employee’s contribution to the plan up to 3% of the employee’s compensation, plus 50% the employee’s contribution to the plan on the next 2% of the employee’s compensation. Matching contributions vest immediately to the employee. Bank contributions to the plan were $999 thousand and $901 thousand for 2023 and 2022, respectively, and were included as a component of salaries and employee benefits expense. ACNB Insurance Services, Inc. has a similar but separate 401(k) plan with the match of 6% for non-highly compensated employees and 3% match for highly compensated employees. ACNB Insurance Services, Inc.’s contributions to the plan were $183 thousand and $157 thousand for 2023 and 2022, respectively, and were included as a component of salaries and employee benefits expense. Nonqualified Compensation Plans The Bank maintains nonqualified compensation plans for selected senior officers. The estimated present value of future benefits is accrued over the period from the effective date of the agreements until the expected retirement dates of the individuals. The balance accrued for these plans included in other liabilities as of December 31, 2023 and 2022, totaled $4.5 million and $4.1 million, respectively. The annual expense included in salaries and employee benefits expense totaled $953 thousand and $628 thousand during the years ended December 31, 2023 and 2022, respectively. To fund the benefits under these plans, the Bank is the owner of single premium life insurance policies on participants in the nonqualified retirement plans. Defined Benefit Pension Plan The Bank has a non-contributory, defined benefit pension plan. No employee hired after March 31, 2012 is eligible to participate in the plan. Retirement benefits are a function of both years of service and compensation. As of the last annual census, the Bank had a combined 336 active, vested terminated, and retired persons in the plan. The funding policy is to contribute annually the amount that is sufficient to meet the minimum funding requirements set forth by ERISA. The Bank uses a measurement date of December 31 for this plan. The following table summarized the changes in the projected benefit obligation and fair value of plan assets for the plan years ended December 31: (In thousands) 2023 2022 Change in benefit obligation: Projected Benefit obligation at beginning of year $ 30,226 $ 39,123 Service cost 495 777 Interest cost 1,493 1,052 Actuarial gain (loss) 983 (9,141) Benefits paid (1,703) (1,585) Projected benefit obligation at end of year 31,494 30,226 Change in plan assets, at fair value: Fair value of plan assets at beginning of year 43,119 50,218 Actual return on plan assets 5,011 (5,514) Benefits paid (1,703) (1,585) Fair value of plan assets at end of year 46,427 43,119 Funded Status, included in other assets $ 14,933 $ 12,893 The amounts recognized in accumulated other comprehensive income (loss) are as follows: (In thousands) 2023 2022 Total net actuarial loss (pre-tax) $ 5,120 $ 6,887 For the years ended December 31, 2023 and 2022, the assumptions used to determine the benefit obligation are as follows: 2023 2022 Discount rate 4.90 % 5.10 % Rate of compensation increase 3.50 % 3.50 % The discount rate assumption used to determine the benefit obligation decreased since last year. This change results in an increase in the benefit obligation. The components of net periodic benefit cost (income) related to the non-contributory, defined benefit pension plan are as follows for the years ended December 31 : (In thousands) 2023 2022 Components of net periodic benefit cost (income): Service cost $ 495 $ 777 Interest cost 1,493 1,052 Expected return on plan assets (2,653) (3,136) Recognized net actuarial loss 392 407 Net Periodic Benefit Income (273) (900) Net gain (1,375) (491) Amortization of net loss (392) (407) Total recognized in other comprehensive income (loss) (1,767) (898) Total recognized in net periodic benefit cost (income) and other comprehensive income $ (2,040) $ (1,798) The assumptions used to determine the net periodic benefit cost (income) are as follows for the years ended December 31: 2023 2022 Discount rate 5.10 % 2.75 % Expected long-term rate of return on plan assets 6.75 % 6.75 % Rate of compensation increase 3.50 % 3.50 % The Corporation’s comparison of obligations to plan assets at December 31, 2023 and 2022 are as follows: (In thousands) 2023 2022 Projected benefit obligation $ 31,494 $ 30,226 Accumulated benefit obligation 30,411 29,150 Fair value of plan assets at measurement date 46,427 43,119 For the year ended December 31, 2023 the mortality assumption was updated to reflect the most recently published mortality information through October 2023. Estimated future benefit payments are as follows: Year (in thousands) 2024 $ 2,010 2025 2,060 2026 2,070 2027 2,060 2028 2,060 2029-2033 10,750 The Corporation’s overall investment strategy is to achieve a mix of investments to meet the long-term rate of return assumption and near-term pension obligations with a diversification of assets types, fund strategies and fund managers. The mix of investments is adjusted periodically by retaining an advisory firm to recommend appropriate allocations after reviewing the Corporation’s risk tolerance on contribution levels, funded status and plan expense, and any applicable regulatory requirements. The weighted-average assets’ allocation in the following table represents the Corporation’s conclusion on the appropriate mix of investments. The specific investment vehicles are institutional separate accounts from a variety of fund managers which are regularly reviewed by the Corporation for acceptable performance. The Corporation’s pension plan weighted-average assets’ allocations at December 31, 2023 and 2022, are as follows: 2023 2022 Equity securities 43 % 46 % Debt securities 54 49 Real property 3 5 100 % 100 % Equity securities included $3.9 million of the Corporation’s common stock, or 8%, of total plan assets, and $3.3 million, or 8%, of total plan assets, at December 31, 2023 and 2022, respectively. Fair value measurements were as follows: (In thousands) Total Level 1 Level 2 Level 3 December 31, 2023 Equity securities $ 20,123 $ 3,876 $ 16,247 $ — Debt securities 24,891 — 24,891 — Real estate 1,413 — 1,413 — Total $ 46,427 $ 3,876 $ 42,551 $ — December 31, 2022 Equity securities $ 19,749 $ 3,339 $ 16,410 $ — Debt securities 21,228 — 21,228 — Real estate 2,142 — 2,142 — Total $ 43,119 $ 3,339 $ 39,780 $ —

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The components of income tax expense were as follows: (In thousands) 2023 2022 Current: Federal $ 7,924 $ 7,461 State (534) 1,259 Total 7,390 8,720 Deferred: Federal 755 592 State 16 (113) Total 771 479 Provision for income taxes $ 8,161 $ 9,199 The differences between the ETR and the federal statutory income tax rate are as follows: 2023 2022 Federal income tax at statutory rate 21.0 % 21.0 % State income taxes, net of federal benefit 1.5 1.8 Tax-exempt income (1.3) (1.1) Earnings on investment in bank-owned life insurance (1.0) (0.7) Tax credit benefits — (0.6) Other 0.3 0.1 Effective income tax rate 20.5 % 20.5 % The net deferred tax asset recorded by the Corporation is included in other assets and consists of the following tax effects of temporary differences as of December 31: (In thousands) 2023 2022 Deferred tax assets: Investment securities available for sale $ 12,052 $ 15,210 Allowance for credit losses 4,533 4,128 Accrued deferred compensation 1,166 1,064 Pension 1,162 1,608 Deferred director fees 1,097 978 Other 783 719 Lease liability 742 731 Nonaccrual interest 740 792 Allowance for unfunded commitments 390 — Accumulated depreciation 3 — Purchase accounting — 149 Total gross deferred tax assets 22,668 25,379 Deferred tax liabilities: Prepaid benefit cost 4,552 4,571 Goodwill and intangibles, net 1,439 1,462 Right of use asset 742 731 Prepaid expenses 67 179 Deferred loan fees 57 66 Accumulated depreciation — 208 Purchase accounting 25 — Total gross deferred tax liabilities 6,882 7,217 Net deferred tax asset $ 15,786 $ 18,162 Rehabilitation and low-income housing income tax credits were $14 thousand and $281 thousand, during 2023 and 2022, respectively. The Corporation did not have any uncertain tax positions at December 31, 2023 and 2022. The Corporation’s policy is to recognize interest and penalties on unrecognized tax benefits in income tax expense in the Consolidated Statements of Income. The Corporation and its subsidiaries are subject to U.S. federal income tax as well as income tax of the states for which income is derived. The Corporation is no longer subject to examination by taxing authorities for year before 2019.

REGULATORY MATTERS

REGULATORY MATTERS	12 Months Ended
	Dec. 31, 2023
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
REGULATORY MATTERS	REGULATORY MATTERS Regulatory Capital Requirements The Corporation and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Corporation’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Corporation and the Bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Minimum regulatory capital requirements established by Basel III rules require the Corporation and the Bank to: • Meet a minimum Tier 1 leverage capital ratio of 4.0% of average assets; • Meet a minimum Common Equity Tier 1 capital ratio of 4.5% of risk-weighted assets; • Meet a minimum Tier 1 capital ratio of 6.0% of risk-weighted assets; • Meet a minimum Total capital ratio of 8.0% of risk-weighted assets; • Maintain a “capital conservation buffer” of 2.5% above the minimum risk-based capital requirements, which must be maintained to avoid restrictions on capital distributions and certain discretionary bonus; and, • Comply with the definition of capital to improve the ability of regulatory capital instruments to absorb losses. Management believes, as of December 31, 2023, that the Corporation and the Bank meet all capital adequacy requirements to which they are subject. There are no subsequent conditions or events that management believes have changed the Bank’s category. The actual and required regulatory capital levels, leverage ratios and risk-based capital ratios as of December 31: Actual For Capital Adequacy To be Well Capitalized under Prompt Corrective Action Provisions (2) (Dollars in thousands) Amount Ratio Amount (1) Ratio (1) Amount Ratio CORPORATION 2023 Tier 1 Leverage Capital (to average assets) $ 280,135 11.57 % $ 96,822 4.0% N/A N/A Common Equity Tier 1 Capital (to risk-weighted assets) 274,844 15.16 81,562 4.5 N/A N/A Tier 1 Capital (to risk-weighted assets) 280,135 15.46 108,749 6.0 N/A N/A Total Capital (to risk-weighted assets) 315,564 17.41 144,999 8.0 N/A N/A 2022 Tier 1 Leverage Capital (to average assets) $ 258,468 9.91 % $ 104,372 4.0% N/A N/A Common Equity Tier 1 Capital (to risk-weighted assets) 252,468 15.00 75,733 4.5 N/A N/A Tier 1 Capital (to risk-weighted assets) 258,468 15.36 100,978 6.0 N/A N/A Total Capital (to risk-weighted assets) 291,421 17.32 134,637 8.0 N/A N/A ACNB BANK 2023 Tier 1 Leverage Capital (to average assets) $ 268,314 11.12 % $ 96,494 4.0% $ 120,618 5.0% Common Equity Tier 1 Capital (to risk-weighted assets) 268,314 14.86 81,260 4.5 117,375 6.5 Tier 1 Capital (to risk-weighted assets) 268,314 14.86 108,346 6.0 144,462 8.0 Total Capital (to risk-weighted assets) 288,742 15.99 144,462 8.0 180,577 10.0 2022 Tier 1 Leverage Capital (to average assets) $ 246,184 9.50 % $ 103,690 4.0% $ 129,612 5.0% Common Equity Tier 1 Capital (to risk-weighted assets) 246,184 14.68 75,441 4.5 108,971 6.5 Tier 1 Capital (to risk-weighted assets) 246,184 14.68 100,588 6.0 134,118 8.0 Total Capital (to risk-weighted assets) 264,137 15.76 134,118 8.0 167,647 10.0 _______________________________ (1) Amounts and ratios do not include capital conservation buffer. (2) N/A - Not applicable as “well capitalized” applies only to banks. Dividend Restrictions Dividend payments by the Bank to the Corporation are subject to certain legal and regulatory limitations. As of December 31, 2023 $48.3 million of undistributed earnings of the Bank, included in consolidated retained earnings, was available for distribution to the Corporation as dividends without prior regulatory approval. Additionally, dividends paid by the Bank to the Corporation would be prohibited if the effect thereof would cause the Bank’s capital to be reduced below applicable minimum capital requirements.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2023
Risks and Uncertainties [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Commitments The Corporation is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments consist primarily of commitments to extend credit (typically mortgages and commercial loans) and, to a lesser extent, standby letters of credit. To varying degrees, these instruments involve elements of credit and interest rate risk in excess of the amount recognized on the Consolidated Statement of Condition. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual amount of those instruments. The Corporation uses the same credit policies in making commitments and conditional obligations as it does for on balance sheet instruments. The Corporation does not anticipate any material losses from these commitments. Commitments to extend credit, including commitments to grant loans and unfunded commitments under lines of credit, are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Corporation evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Corporation upon extensions of credit, is based on management’s credit evaluation of the customer. Collateral held varies but may include accounts receivable, inventory, property and equipment and income-producing commercial properties. On loans secured by real estate, the Corporation generally requires loan to value ratios of no greater than 80%. Standby letters of credit are conditional commitments issued by the Corporation to guarantee the performance of a customer to a third-party. Those guarantees are primarily issued to support public and private borrowing arrangements and similar transactions. The terms of the letters of credit vary and may have renewal features. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. The Corporation generally holds collateral and/or personal guarantees supporting those commitments for which collateral is deemed necessary. Management believes that the proceeds obtained through a liquidation of such collateral and the enforcement of guarantees would be sufficient to cover the maximum potential amount of future payments required under the corresponding guarantees. The Corporation maintains a $5.0 million unsecured line of credit with a correspondent bank. The Corporation guarantees a note related to a $1.5 million commercial line of credit with a correspondent bank, with normal terms and conditions for such a line, for ACNB Insurance Services, the borrower. The commercial line of credit is for general working capital needs as they arise by the ACNB Insurance Services. The liability is recorded for the net drawn amount of this line, no further liability is recorded for the remaining line as to the guarantor’s obligation as the guarantor would have full recourse from all assets of its wholly-owned subsidiary. There were no advances on these lines at December 31, 2023 and 2022. The Corporation has not been required to perform on any financial guarantees, and has not incurred any losses on its commitments, during the past three years. A summary of the Corporation’s commitments at December 31 were as follows: (In thousands) 2023 2022 Commitments to extend credit $ 403,300 $ 401,786 Standby letters of credit 21,029 11,429 Contingencies The Corporation is subject to claims and lawsuits which arise primarily in the ordinary course of business. Based on information presently available and advice received from legal counsel representing the Corporation in connection with any such claims and lawsuits, it is the opinion of management that the disposition or ultimate determination of any such claims and lawsuits will not have a material adverse effect on the consolidated financial position, consolidated results of operations or liquidity of the Corporation.

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2023
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The Corporation has a simple capital structure. Basic earnings per share of common stock is calculated as net income available to common stockholders divided by the weighted average number of shares outstanding less unvested restricted stock at the end of the period. Diluted earnings per share is calculated as net income available to common stockholders divided by the weighted average number of shares outstanding. Years Ended December 31, 2023 2022 Weighted average shares outstanding (basic) 8,507,803 8,623,012 Unvested shares 28,322 — Weighted average shares outstanding (diluted) 8,536,125 8,623,012 Per share: Basic $ 3.72 $ 4.15 Diluted 3.71 4.15

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Accumulated Other Comprehensive Loss Other comprehensive income includes unrealized gains and losses on investment securities AFS and unrealized gains and losses on changes in funded status of the pension plan which are also recognized as separate components of equity. The components of the accumulated other comprehensive loss, net of taxes, are as follows: (In thousands) Unrealized (Losses) Gains on Pension Accumulated Balance at December 31, 2021 $ (3,474) $ (6,071) $ (9,545) Amounts reclassified from accumulated other comprehensive loss, net of tax: Unrealized losses on AFS securities, net of tax (50,192) — (50,192) Realized losses on securities, net of tax 193 — 193 Amortization of unrealized losses on securities transferred to HTM, net of tax 739 — 739 Amortization of pension net loss, transition liability and prior service cost, net of tax — 317 317 Unrecognized pension net gain, net of tax — 476 476 Net current period other comprehensive (loss) income (49,260) 793 (48,467) Balance at December 31, 2022 (52,734) (5,278) (58,012) Amounts reclassified from accumulated other comprehensive loss, net of tax: Unrealized gain on AFS securities, net of tax 6,814 — 6,814 Realized losses on securities, net of tax 4,052 — 4,052 Amortization of unrealized losses on securities transferred to HTM, net of tax 916 — 916 Amortization of pension net loss, transition liability and prior service cost, net of tax — 258 258 Unrecognized pension net gain, net of tax — 1,063 1,063 Net current period other comprehensive income 11,782 1,321 13,103 Balance at December 31, 2023 $ (40,952) $ (3,957) $ (44,909) Dividend Reinvestment Plan In January 2011, the Corporation offered stockholders the opportunity to participate in the ACNB Corporation Dividend Reinvestment and Stock Purchase Plan. The plan provides registered holders of ACNB Corporation common stock with a convenient way to purchase additional shares of common stock by permitting participants in the plan to automatically reinvest cash dividends on all or a portion of the shares owned and to make quarterly voluntary cash payments under the terms of the plan. Participation in the plan is voluntary, and there are eligibility requirements to participate in the plan. During 2023, 20,361 shares were issued under this plan with proceeds in the amount of $721 thousand. During 2022, 20,908 shares were issued under this plan with proceeds in the amount of $713 thousand. Proceeds are used for general corporate purposes. Stock Incentive Plan On May 1, 2018, stockholders approved and ratified the ACNB Corporation 2018 Omnibus Stock Incentive Plan, effective as of March 20, 2018, in which awards shall not exceed, in the aggregate, 400,000 shares of common stock, plus any shares that were authorized, but not issued, under the ACNB Corporation 2009 Restricted Stock Plan. The ACNB Corporation 2009 Restricted Stock Plan expired by its own terms after 10 years on February 24, 2019. No further shares may be issued under this plan. The remaining 174,055 shares were transferred to the ACNB Corporation 2018 Omnibus Stock Incentive Plan. As of December 31, 2023, 99,381 shares were issued under this plan, of which 32,993 were unvested. Plan expense is recognized over the vesting period of the stock issued and resulted in $1.0 million and $729 thousand of compensation expense during the years ended December 31, 2023 and 2022, respectively. Share Repurchase Plan

ACNB CORPORATION (PARENT COMPAN

ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION	PARENT COMPANY ONLY FINANCIAL INFORMATION CONDENSED STATEMENTS OF CONDITION December 31, (In thousands) 2023 2022 ASSETS Cash $ 16,647 $ 18,263 Investment in banking subsidiary 258,748 225,806 Investment in other subsidiaries 20,023 18,757 Securities and other assets 1,107 1,797 Receivable from banking subsidiary 1,355 1,508 Total Assets $ 297,880 $ 266,131 LIABILITIES AND STOCKHOLDERS’ EQUITY Long-term borrowings $ 20,292 $ 21,000 Other liabilities 127 89 Stockholders’ equity 277,461 245,042 Total Liabilities and Stockholders’ Equity $ 297,880 $ 266,131 CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (LOSS) Years Ended December 31, (In thousands) 2023 2022 Dividends from banking subsidiary $ 9,702 $ 9,117 Net (loss) gain on sales of securities (7) 13 Other Income 41 519 9,736 9,649 Expenses 1,934 1,653 7,802 7,996 Income tax benefit 413 516 8,215 8,512 Equity in undistributed earnings of subsidiaries 23,473 27,240 Net Income $ 31,688 $ 35,752 Comprehensive Income (Loss) $ 44,791 $ (12,715) CONDENSED STATEMENTS OF CASH FLOWS Years Ended December 31, (In thousands) 2023 2022 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 31,688 $ 35,752 Equity in undistributed earnings of subsidiaries (23,473) (27,240) (Increase) decrease in receivable from banking subsidiary 153 (311) Gain on sale of equity securities (7) (13) Mark-to-market gain on equity securities — 177 Gain on sale of low-income housing partnership — (421) Other 439 (308) Net Cash Provided by Operating Activities 8,800 7,636 CASH FLOWS FROM INVESTING ACTIVITIES Return on investment from subsidiary — 13,000 Proceeds from sale of low-income housing partnership — 421 Proceeds from sale of equity securities 592 811 Net Cash Used in Investing Activities 592 14,232 CASH FLOWS USED IN FINANCING ACTIVITIES Repayments on long-term borrowings — (2,700) Dividends paid (9,702) (9,117) Common stock repurchased (2,027) (6,681) Common stock issued 721 1,442 Net Cash Used in Financing Activities (11,008) (17,056) Net Increase (Decrease) in Cash and Cash Equivalents (1,616) 4,812 CASH AND CASH EQUIVALENTS — BEGINNING 18,263 13,451 CASH AND CASH EQUIVALENTS — ENDING $ 16,647 $ 18,263

SEGMENT AND RELATED INFORMATION

SEGMENT AND RELATED INFORMATION	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
SEGMENT AND RELATED INFORMATION	SEGMENT AND RELATED INFORMATION The Corporation has two reporting segments, the Bank and ACNB Insurance Services, Inc. as discussed further in Note 1 - “Summary of Significant Accounting Policies.” Segment information for the years ended December 31: (In thousands) Banking Insurance Total 2023 Interest income and other income from external customers $ 105,766 $ 9,319 $ 115,085 Interest expense 8,320 — 8,320 Depreciation and amortization expense 2,515 847 3,362 Income before income taxes 38,148 1,701 39,849 Total assets 2,399,151 19,696 2,418,847 Goodwill 35,800 8,385 44,185 Capital expenditures 424 744 1,168 2022 Interest income and other income from external customers $ 101,240 $ 7,616 $ 108,856 Interest expense 3,591 33 3,624 Depreciation and amortization expense 2,995 801 3,796 Income before income taxes 43,639 1,312 44,951 Total assets 2,505,353 20,154 2,525,507 Goodwill 35,800 8,385 44,185 Capital expenditures 1,783 28 1,811

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policy)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations ACNB Corporation, headquartered in Gettysburg, Pennsylvania, provides banking, insurance, and financial services to businesses and consumers through its wholly-owned subsidiaries, ACNB Bank and ACNB Insurance Services, Inc., formerly Russell Insurance Group, Inc. The Bank engages in full-service commercial and consumer banking and wealth management services, including trust and retail brokerage, through its 26 community banking offices, including 17 community banking office locations in Adams, Cumberland, Franklin, and York Counties, Pennsylvania, and nine community banking office locations in Carroll and Frederick Counties, Maryland. There are also loan production offices in Lancaster and York, Pennsylvania, and Hunt Valley, Maryland. ACNB Insurance Services, Inc. is a full-service insurance agency based in Westminster, Maryland, with additional locations in Jarrettsville, Maryland, and Gettysburg, Pennsylvania. The agency offers a broad range of property, casualty, health, life and disability insurance to both individual and commercial clients. On February 28, 2022, ACNB Insurance Services, Inc. completed the acquisition of the business and assets of Hockley & O’Donnell Insurance Agency, LLC, Gettysburg, PA. This insurance agency acquisition in Adams County, PA, leveraged the affiliation with ACNB Corporation and ACNB Bank in their headquarters’ market. ACNB Bank announced plans to rebrand its Maryland banking divisions on December 19, 2022. Effective January 1, 2023, these divisions, NWSB Bank and FCB Bank, formally adopted the ACNB Bank name and brand identity in the counties of Carroll and Frederick in northern Maryland, respectively. The goal of this rebranding initiative was to eliminate customer confusion, especially for those who bank in multiple markets, and to provide future operating and cost efficiencies. Further, this step now fully aligns the brand of ACNB Bank with that of ACNB Insurance Services which was rebranded effective January 1, 2022, to create enhanced synergies and market recognition throughout the Corporation’s Market Area.
Basis of Financial Statements	Basis of Financial Statements The consolidated financial statements have been prepared in accordance with GAAP and include the accounts of the Corporation and its wholly-owned subsidiaries. All significant intercompany transactions have been eliminated. Assets held by the Corporation’s Wealth Management Department, including trust and retail brokerage, in an agency, fiduciary or retail brokerage capacity for its customers are excluded from the consolidated financial statements since they do not constitute assets of the Corporation. Assets held by the Wealth Management Department amounted to $639.4 million and $518.8 million at December 31, 2023 and 2022, respectively. Income from fiduciary, investment management and brokerage activities are included in other income.
Subsequent Events	The Corporation evaluates subsequent events through the filing of this report with the SEC.
Use of Estimates	Use of Estimates To prepare financial statements in conformity with GAAP management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for credit losses.
Cash Flows	Cash and Cash Equivalents
Securities	Investment Securities On January 1, 2023 the Corporation adopted ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”, universally referred to as CECL. ASU 2016-13 applies to all financial instruments carried at amortized cost, including HTM securities, and makes targeted improvements to the accounting for credit losses on AFS securities. In addition, Topic 326 amends the accounting for credit losses on certain other debt securities. The Corporation did not record any allowance for credit losses on its debt securities as a result of adopting Topic 326. Equity securities with readily determinable fair values are recorded at fair value with changes in fair value recognized in net income. Debt securities that management has the positive intent and ability to hold to maturity are classified as “held to maturity” and recorded at amortized cost. Debt securities not classified as HTM or trading are classified as “available for sale” and recorded at fair value, with unrealized gains and losses excluded from earnings and reported, net of tax, in other comprehensive income (loss). Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Declines in the fair value of HTM and AFS securities below their cost that are deemed to be impaired are reflected in earnings as realized losses. In relation to HTM securities, any declines in the fair value that are assumed to impair the credit quality of such debt instruments are evaluated and the estimated loss is incorporated into the Banks’ expected credit losses for any given period. In estimating impairment losses on debt securities, management considers (1) whether management intends to sell the security, or (2) if it is more likely than not that management will be required to sell the security before recovery, or (3) if management does not expect to recover the entire amortized cost basis. In assessing potential impairment for equity securities, consideration is given to management’s intention and ability to hold the securities until recovery of unrealized losses. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Transfers of debt securities into the HTM category from the AFS category are made at fair value at the date of transfer. The unrealized holding gain or loss at the date of transfer is retained in other comprehensive income (loss) and in the carrying value of the HTM securities. Such amounts are amortized over the remaining expected life of the security.
Loans Held for Sale	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value, as determined by aggregate outstanding commitments from investors or current investor yield requirements. Net unrealized losses are recognized through a valuation allowance by charges to income. Mortgage loans held for sale are sold with the mortgage servicing rights released to another financial institution through a correspondent relationship. The correspondent financial institution absorbs all of the risk related to rate lock commitments. Gains or losses on sales of mortgage loans are recognized based on the difference between the selling price and the carrying value of the related mortgage loans sold.
Loans	Loans The Corporation grants commercial, residential, and consumer loans to customers. A substantial portion of the loan portfolio is represented by commercial real estate and residential mortgage loans throughout southcentral Pennsylvania and northern Maryland. The ability of the Corporation’s debtors to honor their contracts is dependent upon the real estate values and general economic conditions in this area. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge-offs and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. The loans receivable portfolio is segmented into commercial, residential mortgage, home equity lines of credit, and consumer loans. Commercial loans consist of the following classes: commercial and industrial, commercial real estate, and real estate construction. The accrual of interest on commercial loans and residential mortgage is discontinued at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Consumer loans, including home equity lines of credit, are typically charged off no later than 120 days past due. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful. Facts and circumstances can arise that cause a loan to be placed on nonaccrual if payment capacity is insufficient. All interest accrued, but not collected, for loans that are placed on nonaccrual or charged off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Allowance for Credit Losses	Allowance for Credit Losses As mentioned above, in 2023 the Corporation adopted CECL which replaced the incurred loss methodology. The measurement of expected credit losses under CECL is applicable to financial assets measured at amortized cost, including loans, HTM securities and purchased financial assets, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. It also applies to OBS credit exposures, such as loan commitments, standby letters of credit, financial guarantees and other similar instruments. Financial institutions and other organizations will now use forecasted information to better inform their credit loss estimates. Many of the loss estimation techniques applied previously are still permitted, although the inputs to those techniques changed to reflect the full amount of expected credit losses. The Corporation maintains an ACL at a level determined to be adequate to absorb expected credit losses associated with the Corporation’s financial instruments over the life of those instruments as of the balance sheet date. As part of its process of adopting CECL, management implemented a third-party software solution and determined appropriate loan segments, methodologies, model assumptions and qualitative components. The Corporation’s systematic ACL methodology is based on the following portfolio segments: Commercial and Industrial, Commercial Real Estate, Real Estate Construction, Residential Mortgage, Home Equity Lines of Credit and Consumer. The loan portfolio is segmented by loan types that have similar risk characteristics and types of collateral and that behave similarly during economic cycles. The calculation includes both a quantitative and qualitative component which incorporates the forecasting of certain economic variables. The Bank engaged a third-party to assist in developing the CECL model and to assist with evaluation of data and methodologies related to this standard. The Bank’s CECL Committee, which includes members from Credit Administration, Accounting/Finance, Risk Management and Internal Audit, has oversight by the Chief Executive Officer, Chief Financial Officer, and Chief Credit Officer. The Bank’s implementation plan also included the assessment and documentation of appropriate processes, policies and internal controls. Management had a third-party independent consultant review and validate the CECL model. The ultimate impact of adopting Topic 326, and at each subsequent reporting period, is highly dependent on credit quality, macroeconomic forecasts and conditions, composition of the loans and securities portfolio, along with other management judgments. The Corporation adopted Topic 326 using the modified retrospective method. 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. The segmentation in the CECL model is different from the segmentation in the incurred loss model, however there was minimal impact on the presentation of the financial statement disclosures. The following is a discussion of the key risks by portfolio segment that management assesses in preparing the ACL. Commercial Real Estate — The Corporation engages in commercial real estate lending in its primary market and surrounding areas. The portfolio is secured primarily by commercial retail space, office buildings, and hotels. Generally, commercial real estate loans have terms that do not exceed 20 years, have loan-to-value ratios of up to 80% of the appraised value of the property, and are typically secured by personal guarantees of the borrowers. In underwriting these loans, the Corporation performs a thorough analysis of the financial condition of the borrower, the borrower’s credit history, and the reliability and predictability of the cash flow generated by the property securing the loan. Appraisals on properties securing commercial real estate loans originated by the Corporation are performed by independent appraisers. Commercial real estate loans generally present a higher level of risk than other types of loans due primarily to the effect of general economic conditions and the complexities involved in valuing the underlying collateral. Residential Mortgage — One-to-four family residential mortgage loan originations, including home equity closed-end loans, are generated by the Corporation’s marketing efforts, its present customers, walk-in customers, and referrals. These loans originate primarily within the Corporation’s Market Area or with customers primarily from the Market Area. The Corporation offers fixed-rate and adjustable-rate mortgage loans with terms up to a maximum of 30 years for both permanent structures and those under construction. The Corporation’s one-to-four family residential mortgage originations are secured primarily by properties located in its primary Market Area and surrounding areas. The majority of the Corporation’s residential mortgage loans originate with a loan-to-value of 80% or less. Loans in excess of 80% are required to have private mortgage insurance. In underwriting one-to-four family residential real estate loans, the Corporation evaluates both the borrower’s financial ability to repay the loan as agreed and the value of the property securing the loan. Properties securing real estate loans made by the Corporation are appraised by independent appraisers. The Corporation generally requires borrowers to obtain an attorney’s title opinion or title insurance, as well as fire and property insurance (including flood insurance, if necessary) in an amount not less than the amount of the loan. The Corporation has not engaged in subprime residential mortgage originations. Residential mortgage loans are subject to risk due primarily to general economic conditions, as well as periods of weak housing markets. Commercial and Industrial — The Corporation originates commercial and industrial loans primarily to businesses located in its primary Market Area and surrounding areas. These loans are used for various business purposes which include short-term loans and lines of credit to finance machinery and equipment purchases, inventory, and accounts receivable. Generally, the maximum term for loans extended on machinery and equipment is based on the projected useful life of such machinery and equipment. Most business lines of credit are written on demand and may be renewed annually. Commercial and industrial loans are generally secured with short-term assets; however, in many cases, additional collateral such as real estate is provided as additional security for the loan. Loan-to-value maximum values have been established by the Corporation and are specific to the type of collateral. Collateral values may be determined using invoices, inventory reports, accounts receivable aging reports, collateral appraisals, etc. In underwriting commercial and industrial loans, an analysis is performed to evaluate the borrower’s character and capacity to repay the loan, the adequacy of the borrower’s capital and collateral, as well as the conditions affecting the borrower. Evaluation of the borrower’s past, present and future cash flows is also an important aspect of the Corporation’s analysis. Commercial loans generally present a higher level of risk than other types of loans due primarily to the effect of general economic conditions. Home Equity Lines of Credit — The Corporation originates home equity lines of credit primarily within the Corporation’s Market Area or with customers primarily from the Market Area. Home equity lines of credit are generated by the Corporation’s marketing efforts, its present customers, walk-in customers, and referrals. Home equity lines of credit are secured by the borrower’s primary residence with a maximum loan-to-value of 90% and a maximum term of 20 years. In underwriting home equity lines of credit, the Corporation evaluates both the value of the property securing the loan and the borrower’s financial ability to repay the loan as agreed. The ability to repay is determined by the borrower’s employment history, current financial condition, and credit background. Home equity lines of credit generally present a moderate level of risk due primarily to general economic conditions, as well as periods of weak housing markets. Junior liens inherently have more credit risk by virtue of the fact that another financial institution may have a higher security position in the case of foreclosure liquidation of collateral to extinguish the debt. Generally, foreclosure actions could become more prevalent if the real estate markets are weak and property values deteriorate. Real Estate Construction — The Corporation engages in real estate construction lending in its primary market and surrounding areas. The Corporation’s real estate construction lending consists of commercial and residential site development loans, as well as commercial building construction and residential housing construction loans. The Corporation’s real estate construction loans are generally secured with the subject property. Terms of construction loans depend on the specifics of the project, such as estimated absorption rates, estimated time to complete, etc. In underwriting real estate construction loans, the Corporation performs a thorough analysis of the financial condition of the borrower, the borrower’s credit history, and the reliability and predictability of the cash flow generated by the project using feasibility studies, market data, etc. Appraisals on properties securing real estate construction loans originated by the Corporation are performed by independent appraisers. Real estate construction loans generally present a higher level of risk than other types of loans due primarily to the effect of general economic conditions and the uncertainties surrounding total construction costs. Consumer — The Corporation offers a variety of secured and unsecured consumer loans, including those for vehicles and mobile homes and loans secured by savings deposits. These loans originate primarily within the Corporation’s Market Area or with customers primarily from the Market Area. Consumer loan terms vary according to the type and value of collateral and the creditworthiness of the borrower. In underwriting consumer loans, a thorough analysis of the borrower’s financial ability to repay the loan as agreed is performed. The ability to repay is determined by the borrower’s employment history, current financial condition, and credit background. Consumer loans may entail greater credit risk than residential mortgage loans or home equity lines of credit, particularly in the case of consumer loans which are unsecured or are secured by rapidly depreciable assets such as automobiles or recreational equipment. In such cases, any repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment of the outstanding loan balance as a result of the greater likelihood of damage, loss or depreciation. In addition, consumer loan collections are dependent on the borrower’s continuing financial stability, and thus are more likely to be affected by adverse personal circumstances. Furthermore, the application of various federal and state laws, including bankruptcy and insolvency laws, may limit the amount which can be recovered on such loans. The adoption of Topic 326 resulted in a Day 1 adjustment of $3.3 million, including an increase to the ACL of $1.6 million and a $1.6 million reserve on unfunded loan commitments recorded in the liabilities section on the Consolidated Statements of Condition on January 1, 2023. As of January 1, 2023, the Corporation recorded a cumulative effect adjustment of $2.4 million to decrease retained earnings related to the adoption of Topic 326. Upon CECL adoption, the Corporation elected to implement the regulatory agencies’ capital transition relief over the permissible three-year period. The following table illustrates the impact of Topic 326: January 1, 2023 (In thousands) Pre Topic 326 As Reported Under Topic 326 Impact of Topic 326 Adoption Allowance for Credit Losses on Loans: Commercial and industrial $ (2,848) $ (2,086) $ 762 Commercial real estate (10,016) (11,122) (1,106) Real estate construction (1,000) (2,347) (1,347) Residential mortgage (3,029) (3,326) (297) Home equity lines of credit (347) (364) (17) Consumer (376) (234) 142 Unallocated (245) — 245 Allowance for credit losses on loans $ (17,861) $ (19,479) $ (1,618) Assets: Total Loans, net of allowance for credit losses $ 1,520,749 $ 1,519,131 $ 1,618 Net deferred tax asset 17,718 18,452 734 Liabilities: Allowance for unfunded commitments 92 1,735 1,643 Equity: Retained earnings 245,042 242,674 2,368 The ACL represents an amount which, in management’s judgment, is adequate to absorb expected losses on outstanding loans at the balance sheet date based on the evaluation of the size and current risk characteristics of the loan portfolio, past events, current conditions, reasonable and supportable forecasts of future economic conditions and prepayment experience. The ACL is measured and recorded upon the initial recognition of a financial asset. The ACL is reduced by charge-offs, net of recoveries of previous losses, and is increased or decreased by a provision for credit losses, which is recorded as a current period operating expense. The Company believes it uses relevant information available to make determinations about the ACL and that it has established the existing allowance in accordance with GAAP. However, the determination of the ACL requires significant judgment and estimates of expected losses in the loan portfolio can vary significantly from the amounts actually observed. While the Company uses available information to recognize expected losses, future additions to the ACL may be necessary based on changes in the loans comprising the portfolio, changes in the current and forecasted economic conditions, changes to the interest rate environment which may directly impact prepayment and curtailment rate assumptions, and/or changes in the financial condition of borrowers. The adoption of CECL did not result in a significant change to any other credit risk management and monitoring processes, including identification of past due or delinquent borrowers, nonaccrual practices or charge-off policies. The Corporation’s methodology for estimating the ACL includes: Segmentation. The Corporation’s loan portfolio is segmented by loan types that have similar risk characteristics and types of collateral and behave similarly during economic cycles. Specific Analysis. A specific reserve analysis is applied to certain individually evaluated loans. These loans are evaluated quarterly generally based on collateral value, observable market value or the present value of expected future cash flows. A specific reserve is established if the fair value is less than the loan balance. A charge-off is recognized when the loss is quantifiable. Quantitative Analysis . The Corporation elected to use Discounted Cash Flow and chose unemployment rate as the driving factor of their economic forecasts. In regards to unemployment rates, the Corporation elected to forecast economic factors over the period of the next four quarters. The Corporation chose not to extend beyond four quarters given the inherent risks associated with forecasting. The Corporation utilizes relevant third-party forecasts as a basis and support for its own forecast. These forecasts are assumed to revert to the long-term average and utilized in the model to estimate the PD and LGD through regression. The Corporation elected a reversion period of four quarters. The Corporation deemed four quarters to be a reasonable time period to ensure it did not include irrelevant information, but also not too short to introduce unnecessary volatility. Model assumptions include, but are not limited to the discount rate, prepayment speeds, funding rates, PD, LGD and curtailments. The product of the PD and the LGD is the estimated loss rate, which varies over time. The estimated loss rate is applied within the appropriate periods in the cash flow model to determine the net present value. Net present value is also impacted by assumptions related to the duration between default and recovery. The reserve is based on the difference between the summation of the principal balances taking amortized costs into consideration and the summation of the net present values. Qualitative Analysis. Based on management’s review and analysis of internal, external and model risks, management may adjust the model output. Management reviews the peaks and troughs of the model’s calibration, considering economic forecasts to develop guardrails that serve as the basis for determining the reasonableness of the model’s output and makes adjustments as necessary. This process challenges unexpected variability resulting from outputs beyond the model’s calibration that appear to be unreasonable. Additionally, management may adjust the economic forecast if it is incompatible with known market conditions based on management’s experience and perspective. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 made certain targeted amendments specific to troubled debt restructurings by creditors and vintage disclosure related to gross write-offs. Upon adoption, the Corporation is required to apply the loan and refinancing and restructuring guidance to determine whether a modification results in a new loan or a continuation of an existing loan, rather than applying the recognition and measurement guidance for TDRs. The ASU also requires companies to disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases within scope of Subtopic 326-20. The Corporation adopted ASU 2022-02 on January 1, 2023. ACL Methodology Before CECL Adoption For the year ended December 31, 2022 and prior, the ACL was established as losses were estimated to occur through a provision for credit losses charged to earnings. Credit losses were charged against the allowance when management believed the uncollectibility of a loan balance was confirmed. Subsequent recoveries, if any, were credited to the ACL. The ACL was evaluated on a regular basis by management and was based upon management’s periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may have affected the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation was inherently subjective as it required estimates that are susceptible to significant revision as more information became available. The ACL consisted of specific, general and unallocated components. The specific component related to loans that were classified as either doubtful, substandard, or special mention. For such loans that were also classified as impaired, an ACL was established when the discounted cash flows (or collateral value or observable market price) of the impaired loan was lower than the carrying value of that loan. The general component covered pools of loans by loan class including commercial loans not considered impaired, as well as smaller balance homogeneous loans, such as residential real estate, home equity, and other consumer loans. These pools of loans were evaluated for loss exposure based upon historical loss rates for each of these categories of loans, adjusted for qualitative risk factors. These qualitative risk factors included: • Lending policies and procedures, including underwriting standards and collection, charge-off and recovery practices; • National, regional and local economic and business conditions, as well as the condition of various market segments, including the impact on the value of underlying collateral for collateral dependent loans; • Nature and volume of the portfolio and terms of loans; • Experience, ability and depth of lending management and staff; • Volume and severity of past due, classified and nonaccrual loans, as well as other loan modifications; and, • Existence and effect of any concentrations of credit and changes in the level of such concentrations. Each factor was assigned a value to reflect improving, stable or declining conditions based on management’s best judgment using relevant information available at the time of the evaluation. Adjustments to the factors were supported through documentation of changes in conditions in a narrative accompanying the ACL calculation. The unallocated component of the ACL was maintained to cover uncertainties that could affect management’s estimate of probable losses. The unallocated component of the ACL reflected the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. It covered risks that were inherently difficult to quantify including, but not limited to, collateral risk, information risk, and historical charge-off risk. A loan is considered impaired when, based on current information and events, it is probable that the Corporation will be unable to collect the scheduled payments of principal and/or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and/or interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis for commercial and commercial construction loans by either the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s obtainable market price, or the fair value of the collateral if the loan is collateral dependent. A specific allocation within the ACL is established for an impaired loan if its carrying value exceeds its estimated fair value. The estimated fair values of the Corporation’s impaired loans are measured based on the estimated fair value of the loan’s collateral or the discounted cash flows method. It is the policy of the Corporation to order an updated valuation on all real estate secured loans when the loan becomes 90 days past due and there has not been an updated valuation completed within the previous 12 months. In addition, the Corporation orders third-party valuations on all impaired real estate collateralized loans within 30 days of the loan being classified as impaired. Until the valuations are completed, the Corporation utilizes the most recent independent third-party real estate valuation to estimate the need for a specific allocation to be assigned to the loan. These existing valuations are discounted downward to account for such things as the age of the existing collateral valuation, change in the condition of the real estate, change in local market and economic conditions, and other specific factors involving the collateral. Once the updated valuation is completed, the collateral value is updated accordingly. For commercial and industrial loans secured by non-real estate collateral, such as accounts receivable, inventory and equipment, estimated fair values are determined based on the borrower’s financial statements, inventory reports, accounts receivable aging reports, equipment appraisals, or invoices. Indications of value from these sources are generally discounted based on the age of the financial information or the quality of the assets. The Corporation actively monitors the values of collateral as well as the age of the valuation of impaired loans. The Corporation orders valuations at least every 18 months, or more frequently if management believes that there is an indication that the fair value has declined. For impaired loans secured by collateral other than real estate, the Corporation considers the net book value of the collateral, as recorded in the most recent financial statements of the borrower, and determines fair value based on estimates made by management. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, the Corporation did not separately identify individual consumer and residential loans for impairment disclosures, unless such loans were the subject of a troubled debt restructure. The allowance calculation methodology includes further segregation of loan classes into credit quality rating categories. The borrower’s overall financial condition, repayment sources, guarantors, and value of collateral, if appropriate, are generally evaluated annually for commercial loans or when credit deficiencies arise, such as delinquent loan payments. Credit Quality Indicators The Corporation’s portfolio risk rating analysis estimates the capability of the borrower to repay the contractual obligations of the loan agreements as scheduled or at all. The Corporation’s internal credit risk rating system is based on debt service coverage, collateral values and other subjective factors. Non-commercial-purpose loans are defaulted to a performing classification until a loan migrates to past due status. Special Mention – Considered “Other Assets Especially Mentioned” these loans are currently protected, but are potentially weak. Loans in this rating category constitute an undue and unwarranted credit risk, but not to the point of justifying a classification of substandard. The credit risk may be relatively minor, yet constitutes an unwarranted risk in light of the circumstances surrounding a specific loan. Substandard – Loans in this category are 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. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual loans classified as substandard. Doubtful – Loans in this category have all the weaknesses inherent in one classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The possibility of loss is extremely high, but because of certain important and reasonable specific pending factors which may work to strengthen the credit, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral, and refinancing plans. Loss - Loans classified as a loss are considered uncollectible and are charged to the ACL. Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass-rated loans. In addition, federal and state regulatory agencies, as an integral part of their examination process, periodically review the Corporation’s ACL and may require the Corporation to recognize additions to the allowance based on their judgments about information available to them at the time of their examination, which may not be currently available to management. Based on management’s comprehensive analysis of the loan portfolio and economic conditions, management believes the current level of the allowance for credit losses is adequate.
Concentrations of Credit Risk	Concentration of Credit Risk Most of the Corporation’s activities are with customers located within southcentral Pennsylvania and northern Maryland. Note 3 discusses the types of securities in which the Corporation invests. The types of lending in which the Corporation engages are outlined above. Non-owner occupied commercial real estate represented 60.9% of the commercial real estate portfolio at December 31, 2023. Because of the varied nature of the tenants in aggregate, management believes that these loans present an acceptable risk when compared to commercial loans in general.
Acquired Loans	Acquired Loans Under CECL acquired loans or pools of loans that have experienced more-than-insignificant credit deterioration are deemed to be PCD loans, and are grossed-up on day 1 by the initial credit estimate through the ACL as opposed to a reduction in the loan’s amortized cost. The credit mark on acquired loans deemed not to be PCD loans are reflected as a reduction in the loan’s amortized cost, with an ACL and corresponding provision for credit losses recorded in the first reporting period after acquisition through current period earnings, while the loan mark will accrete through interest income over the life of such loans. At acquisition ACNB will consider several factors as indicators that an acquired loan or pool of loans has experienced more-than-insignificant credit deterioration. These factors may include, but are not limited to, loans 30 days or more past due, loans with an internal risk grade of below average or lower, loans classified as non-accrual by the acquired institution, materiality of the credit and loans that have been previously modified. Upon adoption of CECL acquired loans from prior acquisitions that met the guidelines under ASC 310-30 (formerly known as “purchased credit-impaired”) were reclassified as PCD loans. The accretable portion of the loan mark as of adoption date continues to accrete into interest income. However, the non-accretable portion of the loan mark was added to the ACL upon adoption, and any reversals of such mark will flow through the ACL in future periods.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Corporation, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Corporation does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.
Premises and Equipment	Premises and Equipment three
Leases	Leases All leases with an initial term greater than 12 months recognize: (1) a ROU asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term; and (2) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, each measured on a discounted basis. As a lessee, the majority of the operating lease portfolio consists of real estate leases for the Bank’s community banking offices. The operating leases have remaining lease terms of one year to eight years, some of which include options to renew at varying durations. See “Note 7 - Leases” for additional information.
Restricted Investment in Bank Stocks	Restricted Investment in Bank Stocks Restricted investment in bank stocks, which represents required investments in the common stock of correspondent banks, is carried at cost as of December 31, 2023 and 2022, and consists of common stock in the Atlantic Community Bankers Bank, Community Bankers Bank and Federal Home Loan Bank. Management evaluates the restricted investment in bank stocks for impairment in accordance with ASC Topic 942, Financial Services—Depository and Lending. Management’s determination of whether these investments are impaired is based on their assessment of the ultimate recoverability of their cost rather than by recognizing temporary declines in value. The determination of whether a decline affects the ultimate recoverability of their cost is influenced by criteria such as (1) the significance of the decline in net assets of the correspondent bank as compared to the capital stock amount for the correspondent bank and the length of time this situation has persisted, (2) commitments by the correspondent bank to make payments required by law or regulation and the level of such payments in relation to the operating performance of the correspondent bank, (3) the impact of legislative and regulatory changes on institutions and, accordingly, on the customer base of the correspondent bank, and (4) the liquidity position of the correspondent bank.
Bank-Owned Life Insurance	Bank-Owned Life Insurance The Corporation’s banking subsidiary maintains nonqualified compensation plans for selected senior officers. To fund the benefits under these plans, the Bank is the owner of single premium life insurance policies on participants in the nonqualified retirement plans. Investment in bank-owned life insurance policies was used to finance the nonqualified compensation plans and provide tax-exempt income to the Corporation. ASC Topic 715, Compensation—Retirement Benefits , requires a liability to be recorded during the service period when a split-dollar life insurance agreement continues after participants’ employment or retirement. The required accrued liability is based on either the post-employment benefit cost for continuing life insurance or based on the future death benefit depending on the contractual terms of the underlying agreement. The Corporation’s liability is based on the post-employment benefit cost for continuing life insurance. The Corporation incurred approximately $214 thousand and $81 thousand of expense in 2023 and 2022, respectively, related to these benefits.
Investments in Low-Income Housing Partnerships	Investments in Low-Income Housing Partnerships The Corporation’s investments in low-income housing partnerships are accounted for using the “equity method” prescribed by ASC Topic 323, Investments — Equity Method . In accordance with ASC Topic 740, Income Taxes , tax credits are recognized as they become available. Any residual loss is amortized as the tax credits are received.
Goodwill and Intangible Assets	Goodwill and Intangible Assets The Corporation accounts for its acquisitions using the acquisition accounting method required by ASC Topic 805, Business Combinations. Acquisition accounting requires the total purchase price to be allocated to the estimated fair values of assets and liabilities acquired, including certain intangible assets that must be recognized. Generally, this results in a residual amount in excess of the net fair values, which is recorded as goodwill. Goodwill represents the excess of the cost of an acquisition over the fair value of the net assets acquired. ASC Topic 350, Intangibles—Goodwill and Other, requires that goodwill is not amortized to expense, but rather that it be assessed or tested for impairment at least annually. If certain events occur which might indicate goodwill has been impaired, the goodwill is tested for impairment when such events occur. Impairment write-downs are charged to results of operations in the period in which the impairment is determined. The Corporation did not identify any impairment on the Bank’s or ACNB Insurance Services’ outstanding goodwill from its most recent goodwill impairment analysis which was completed as of December 31, 2023. If certain events occur which indicate goodwill might be impaired between annual assessments, the goodwill would be evaluated for impairment when such events occur. Other intangible assets represent purchased assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights. These assets that have finite lives, such as core deposit intangibles, customer lists and non-compete covenants, are amortized over their estimated useful lives and subject to periodic impairment testing. Core deposit intangibles are primarily amortized over ten years using accelerated methods. Customer lists are amortized using the straight line method over their estimated useful lives which range from eight The fair value of customer lists intangibles was based upon an income approach which included estimated financial projections developed by the Corporation and included other fair value assumptions for attrition, present value discount rates using market participant assumptions. The fair value of the non-compete covenants intangible was based upon an income approach which compared the present value impact of various non-compete scenarios and other fair value assumptions including present value discount rates using market participant assumptions.
Foreclosed Assets	Foreclosed Assets
Income Taxes	Income Taxes The Corporation accounts for income taxes in accordance with income tax accounting guidance ASC Topic 740, Income Taxes . Current income tax accounting guidance results in two components of income tax expense, current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Corporation determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are reduced by a valuation allowance if, based on the weight of the evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. The Corporation accounts for uncertain tax positions if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more-likely-than-not means a likelihood of more than 50%; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management’s judgment. The Corporation recognizes interest and penalties on income taxes, if any, as a component of income tax expense.
Retirement Plan	Defined Benefit Pension Plan Net periodic pension costs are funded based on the requirements of federal laws and regulations. The determination of net periodic pension costs is based on assumptions about future events that will affect the amount and timing of required benefit
Stock-based Compensation	Stock-based Compensation On May 1, 2018, stockholders approved and ratified the ACNB Corporation 2018 Omnibus Stock Incentive Plan, effective as of March 20, 2018, in which awards shall not exceed, in the aggregate, 400,000 shares of common stock, plus any shares that are authorized, but not issued, under the ACNB Corporation 2009 Restricted Stock Plan. The ACNB Corporation 2009 Restricted Stock Plan expired by its own terms after 10 years on February 24, 2019. No further shares may be issued under this plan. The remaining 174,055 shares were transferred to the ACNB Corporation 2018 Omnibus Stock Incentive Plan.
Advertising Costs	Advertising Costs Costs of advertising, which are included in marketing expenses, are expensed when incurred.
Off-Balance Sheet Credit-Related Financial Instruments	Off-Balance Sheet Credit-Related Financial Instruments In the ordinary course of business, the Corporation has entered into commitments to extend credit, including commitments under commercial lines of credit, and standby letters of credit. Such financial instruments are recorded when they are funded.
Loss Contingencies	Loss Contingencies
Restrictions on Cash	Restrictions on Cash
Dividend Restriction	Dividend Restriction Pursuant to the Pennsylvania Banking Code of 1965, as amended, and the regulations of the FDIC, the Bank is required to maintain certain capital levels and is restricted in the dividends that may be paid by the bank to the holding company. In addition, pursuant to the Pennsylvania Business Corporation Law, as amended, and the rules and regulations of the Board of Governors of the Federal Reserve System, the holding company is subject to restrictions on dividends that the holding company may pay to stockholders.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair values of financial instruments are estimated using relevant market information and other assumptions.
Revenue Recognition	Revenue Recognition ACNB generally fully satisfies its performance obligations on its contracts with customers as services are rendered and the transaction prices are typically fixed; charged either on a periodic basis or based on activity. Because performance obligations are satisfied as services are rendered and the transaction prices are fixed, there is little judgment involved that significantly affects the determination of the amount and timing of revenue from contracts with customers. The sources of revenue for ACNB are interest income from loans and investments and noninterest income. Noninterest income is earned from various banking and financial services that ACNB offers through its subsidiaries. Commissions from insurance sales: Commission income is earned based on customers transactions. The commission income is recognized when the transaction is complete. Service charges on deposit accounts: Deposits are included as liabilities in the Consolidated Balance Sheets. Service charges on deposit accounts include: overdraft fees; ATM fees charged for withdrawals by deposit customers from other financial institutions’ ATMs; and a variety of other monthly or transactional fees for services provided to retail and business customers, mainly associated with checking accounts. All deposit liabilities are considered to have one-day terms and therefore related fees are recognized in income at the time when the services are provided to the customers. Wealth Management: ACNB Bank’s Trust & Investment Services, under the umbrella of ACNB Wealth Management, provides a wide range of financial services, including trust services for individuals, businesses and retirement funds. Other services include, but are not limited to, those related to testamentary trusts, life insurance trusts, charitable remainder trusts, guardianships, power of attorney, custodial accounts and investment management and advisor accounts. In addition, ACNB Wealth Management offers retail brokerage-services through a third-party provider. Wealth Management clients are located primarily within the Corporation’s Market Area. The majority of trust services revenue is earned and collected monthly, with the amount determined based on the investment funds in each trust multiplied by a fee schedule for type of trust. Each trust has one integrated set of performance obligations so no allocation is required. The performance obligation is met by performing the identified fiduciary service. Successful performance is confirmed by ongoing internal and regulatory control, measurement is by valuing the trust assets at a monthly date to which a fee schedule is applied. Wealth management fees are contractually agreed upon with each customer, and fee levels vary based mainly on the size of assets under management. ATM debit card charges: The Bank issues debit cards to consumer and business customers with checking, savings or money market deposit accounts. Debit card and ATM transactions are processed via electronic systems that involve several parties. The Corporation’s debit card and ATM transaction processing is executed via contractual arrangements with payment processing networks, a processor and a settlement bank. As described above, all deposit liabilities are considered to have one-day terms and therefore interchange revenue from customers’ use of their debit cards to initiate transactions are recognized in income at the time when the services are provided and related fees received in the Corporation’s deposit account with the settlement bank. Other: Consists of safe deposit rental income, money order fees, check cashing and cashiers’ check fees, wire transfer fees, letter of credit fees, check order income, and other miscellaneous fees. These fees are largely transaction-based; therefore, the Corporation’s performance obligation is satisfied and the resultant revenue is recognized at the point in time the service is rendered. Payments for transaction-based fees are generally received immediately or in the following month by a direct charge to a customer’s account.
Segment Reporting	Segment Reporting While the Corporation monitors the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Corporate-wide basis. The Bank offers banking and wealth management services, including trust and retail brokerage .
New Accounting Pronouncements	Accounting Standards Pending Adoption ASU 2022-06 In December 2022, the FASB issued ASU 2022-06, “Deferral of the Sunset Date of Reference Rate Reform (Topic 848)”. This ASU extends the sunset date of ASC Topic 848 (Reference Rate Reform) to December 31, 2024, in response to the United Kingdom’s Financial Conduct Authority (FCA) extension of the intended cessation date of LIBOR in the United States. The Corporation evaluated the impact of this standard, and believes that its adoption will not have a material impact on the Corporation’s consolidated financial statements. ASU 2023-07 In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280)”. The amendments in this ASU are expected to improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendments of ASU 2023-07 are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The amendments in ASU 2023-07 should be applied retrospectively to all periods presented on the financial statements. The Corporation has adopted the amendments of ASU 2023-07 related to annual disclosure requirements effective January 1, 2024, and will present any newly required annual disclosures in its Annual Report on Form 10-K for the year ending December 31, 2024 and intends to adopt the amendments of ASU 2023-07 related to interim disclosure requirements effective January 1, 2025, and will present any newly required interim disclosures beginning with its Quarterly Report on Form 10-Q for the period ending March 31, 2025. Adoption of this standard is not expected to have a material impact on the Corporation’s consolidated financial statements. ASU 2023-09 In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740)”. This ASU is intended to improve the disclosures for income taxes to address requests from investors, lenders, creditors and other allocators of capital that use the financial statements to make capital allocation decisions. The amendments in ASU 2023-09 will require consistent categories and greater disaggregation of information in the rate reconciliation disclosure as well as disclosure of income taxes paid disaggregated by jurisdiction. The amendments of ASU 2023-09 are effective for annual periods beginning after December 15, 2024, and early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. The Corporation intends to adopt the amendments of ASU 2023-09 effective January 1, 2025, and will include the required disclosures in its Annual Report on Form 10-K for the year ending December 31, 2025. The Corporation is currently evaluating the impact of this standard, and believes that its adoption will not have a material impact on the Corporation’s consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Schedule of the Impact of Topic 326	The following table illustrates the impact of Topic 326: January 1, 2023 (In thousands) Pre Topic 326 As Reported Under Topic 326 Impact of Topic 326 Adoption Allowance for Credit Losses on Loans: Commercial and industrial $ (2,848) $ (2,086) $ 762 Commercial real estate (10,016) (11,122) (1,106) Real estate construction (1,000) (2,347) (1,347) Residential mortgage (3,029) (3,326) (297) Home equity lines of credit (347) (364) (17) Consumer (376) (234) 142 Unallocated (245) — 245 Allowance for credit losses on loans $ (17,861) $ (19,479) $ (1,618) Assets: Total Loans, net of allowance for credit losses $ 1,520,749 $ 1,519,131 $ 1,618 Net deferred tax asset 17,718 18,452 734 Liabilities: Allowance for unfunded commitments 92 1,735 1,643 Equity: Retained earnings 245,042 242,674 2,368

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Unrealized Gain (Loss) on Investments	Fair value of equity securities with readily determinable fair values are as follows: (In thousands) Fair Value at January 1 Purchases Sales/reclassification Gains/(Losses) (Losses)/Gains on sales of securities Fair Value at December 31 2023 CRA Mutual Fund $ 915 $ — $ — $ 13 $ — $ 928 Canapi Ventures SBIC Fund 206 — 206 — — — Stock in other banks 598 — 592 5 (11) — Total $ 1,719 $ — $ 798 $ 18 $ (11) $ 928 2022 CRA Mutual Fund $ 1,036 $ — $ — $ (121) $ — $ 915 Canapi Ventures SBIC Fund — 206 — — — 206 Stock in other banks 1,573 — 811 (177) 13 598 Total $ 2,609 $ 206 $ 811 $ (298) $ 13 $ 1,719 Amortized cost and fair value of debt securities were as follows: (In thousands) Amortized Gross Gross Fair December 31, 2023 Available for Sale U.S. Government and agencies $ 176,458 $ — $ 19,663 $ 156,795 Mortgage-backed securities 293,128 363 28,287 265,204 Corporate bonds 32,326 202 2,834 29,694 Total $ 501,912 $ 565 $ 50,784 $ 451,693 Held to Maturity Mortgage-backed securities $ 2,467 $ — $ 124 $ 2,343 State and municipal 62,133 — 5,419 56,714 Total $ 64,600 $ — $ 5,543 $ 59,057 December 31, 2022 Available for Sale U.S. Government and agencies $ 241,467 $ — $ 30,468 $ 210,999 Mortgage-backed securities 327,535 342 32,159 295,718 State and municipal 15,235 196 196 15,235 Corporate bonds 33,404 15 1,817 31,602 Total $ 617,641 $ 553 $ 64,640 $ 553,554 Held to Maturity Mortgage-backed securities $ 3,279 $ — $ 194 $ 3,085 State and municipal 61,698 — 6,705 54,993 Total $ 64,977 $ — $ 6,899 $ 58,078
Schedule of Unrealized Loss on Investments	The following table shows the gross unrealized and estimated fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2023 and 2022: Less than 12 Months 12 Months or More Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized December 31, 2023 Available for Sale U.S. Government and agencies $ — $ — $ 156,795 $ 19,663 $ 156,795 $ 19,663 Mortgage-backed securities — — 230,443 28,287 230,443 28,287 Corporate bonds — — 15,279 2,834 15,279 2,834 Total $ — $ — $ 402,517 $ 50,784 $ 402,517 $ 50,784 Held to Maturity Mortgage-backed securities $ — $ — $ 2,343 $ 124 $ 2,343 $ 124 State and municipal — — 56,714 5,419 56,714 5,419 Total $ — $ — $ 59,057 $ 5,543 $ 59,057 $ 5,543 December 31, 2022 Available for Sale U.S. Government and agencies $ 25,426 $ 1,461 $ 185,573 $ 29,007 $ 210,999 $ 30,468 Mortgage-backed securities 221,249 19,362 63,145 12,797 284,394 32,159 State and municipal 6,229 196 — — 6,229 196 Corporate bonds 24,337 1,217 5,250 600 29,587 1,817 Total $ 277,241 $ 22,236 $ 253,968 $ 42,404 $ 531,209 $ 64,640 Held to Maturity Mortgage-backed securities $ 3,085 $ 194 $ — $ — $ 3,085 $ 194 State and municipal 38,086 3,875 16,907 2,830 54,993 6,705 Total $ 41,171 $ 4,069 $ 16,907 $ 2,830 $ 58,078 $ 6,899
Investments Classified by Contractual Maturity Date	Amortized cost and fair value at December 31, 2023, by contractual maturity, where applicable, are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay with or without penalties. Available for Sale Held to Maturity (In thousands) Amortized Fair Amortized Fair 1 year or less $ 15,664 $ 15,178 $ — $ — Over 1 year through 5 years 109,772 99,591 1,394 1,299 Over 5 years through 10 years 81,348 70,242 25,391 23,807 Over 10 years 2,000 1,478 35,348 31,608 Mortgage-backed securities 293,128 265,204 2,467 2,343 $ 501,912 $ 451,693 $ 64,600 $ 59,057
Gain (Loss) on Securities	The proceeds from sales of securities and the associated gains and losses are listed below: Years Ended December 31, (In thousands) 2023 2022 Proceeds $ 125,241 $ 4,994 Gross gains 230 14 Gross losses 5,470 248

LOANS AND ALLOWANCE FOR CREDI_2

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)	12 Months Ended
	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Financing Receivable, before Allowance for Credit Loss, Maturity	The composition of the loan portfolio as of December 31: (In thousands) 2023 2022 Commercial real estate $ 898,709 $ 824,111 Residential mortgage 394,189 361,905 Commercial and industrial 152,344 180,958 Home equity lines of credit 90,163 83,463 Real estate construction 84,341 80,491 Consumer 9,954 11,336 Gross loans 1,629,700 1,542,264 Unearned income (1,712) (3,654) Total loans, net of unearned income $ 1,627,988 $ 1,538,610
Financing Receivable, Related Party	Following is a summary of the activity for these related-party loans: (In thousands) 2023 Balance at January 1 $ 5,950 New loans (1) 344 Repayments (1) 987 Balance at December 31 $ 5,307 ———————————————— (1) Includes one additional loan and the removal of one loan due to changes in executive management and directors.
Loan Portfolio Summarized By The Past Due Status	The following tables present the classes of the loan portfolio summarized by the past due status: (In thousands) 30–59 Days Past Due 60–89 Days >90 Days Total Past Current Total Loans Loans December 31, 2023 Commercial real estate $ 150 $ 347 $ — $ 497 $ 898,212 $ 898,709 $ — Residential mortgage 1,293 388 849 2,530 391,659 394,189 505 Commercial and industrial 50 — 159 209 152,135 152,344 — Home equity lines of credit 414 — 654 1,068 89,095 90,163 654 Real estate construction 12 — — 12 84,329 84,341 — Consumer 8 — 3 11 9,943 9,954 3 Total Loans $ 1,927 $ 735 $ 1,665 $ 4,327 $ 1,625,373 $ 1,629,700 $ 1,162 (In thousands) 30–59 Days Past Due 60–89 Days >90 Days Total Past Current Total Loans Loans December 31, 2022 Commercial real estate $ 2,026 $ 350 $ 255 $ 2,631 $ 821,480 $ 824,111 $ — Residential mortgage 2,969 970 705 4,644 357,261 361,905 705 Commercial and industrial 287 — 162 449 180,509 180,958 — Home equity lines of credit 438 117 498 1,053 82,410 83,463 498 Real estate construction 24 — — 24 80,467 80,491 — Consumer 155 80 — 235 11,101 11,336 — Total Loans $ 5,899 $ 1,517 $ 1,620 $ 9,036 $ 1,533,228 $ 1,542,264 $ 1,203
Nonaccrual Loans By Classes Of The Loan Portfolio	The following table presents nonaccrual loans: December 31, 2023 December 31, 2022 (In thousands) With a Related Allowance Without a Related Allowance Total Total Commercial real estate $ 315 $ 1,164 $ 1,479 $ 1,873 Residential mortgage — 343 343 — Commercial and industrial 1,004 — 1,004 781 Home equity lines of credit — 185 185 — $ 1,319 $ 1,692 $ 3,011 $ 2,654
Schedule of Nonperforming Loans	Total nonperforming loans at December 31 are as follows: (In thousands) 2023 2022 Nonaccrual loans $ 3,011 $ 2,654 Greater than 90 days past due and still accruing 1,162 1,203 Total nonperforming loans $ 4,173 $ 3,857
Schedule of actual loan modifications	Loans modified as of December 31, 2023 were as follows: (In thousands) Term Extension % of Total Class of Financing Receivable Commercial and industrial $ 549 0.4 %
Financing Receivable, Amortized Cost Basis	The following table presents the amortized cost basis of individually evaluated loans as of December 31, 2023. Changes in the fair value of the collateral for individually evaluated loans are reported as provision for credit losses or a reversal of provision for credit losses in the period of change. December 31, 2023 Type of Collateral (In thousands) Business Assets Real Estate Commercial real estate $ — $ 1,479 Residential mortgage — 343 Commercial and industrial 1,004 — Home equity lines of credit — 185 Total $ 1,004 $ 2,007
Classes Of The Loan Portfolio Summarized By The Aggregate Risk Rating	The following summarizes designated internal risk categories by portfolio segment for loans that the Bank assigns a risk rating and those that Bank evaluates based on the performance status: December 31, 2023 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis (In thousands) 2023 2022 2021 2020 2019 Prior Total Internally Risk Rated: Commercial real estate Pass $ 136,158 $ 152,767 $ 130,994 $ 60,918 $ 65,856 $ 287,026 $ 13,636 $ 847,355 Special Mention 1,927 6,385 5,920 1,904 8,222 16,244 1,994 42,596 Substandard — — — 1,530 704 6,524 — 8,758 Total Commercial real estate $ 138,085 $ 159,152 $ 136,914 $ 64,352 $ 74,782 $ 309,794 $ 15,630 $ 898,709 Residential mortgage Pass $ 39,146 $ 27,612 $ 41,031 $ 14,758 $ 10,492 $ 27,274 $ 402 $ 160,715 Special Mention 588 82 593 397 826 2,457 62 5,005 Substandard — — — — — 218 — 218 Total Residential Mortgage $ 39,734 $ 27,694 $ 41,624 $ 15,155 $ 11,318 $ 29,949 $ 464 $ 165,938 Commercial and industrial Pass $ 12,319 $ 24,259 $ 34,830 $ 15,614 $ 13,922 $ 17,780 $ 25,147 $ 143,871 Special Mention 128 303 290 529 140 459 2,014 3,863 Substandard 7 135 499 91 9 1,597 2,272 4,610 Total Commercial and industrial $ 12,454 $ 24,697 $ 35,619 $ 16,234 $ 14,071 $ 19,836 $ 29,433 $ 152,344 Year-to-date gross charge-offs $ — $ — $ — $ — $ — $ 110 $ — $ 110 Real estate construction Pass $ 19,766 $ 39,758 $ 3,953 $ 1,160 $ — $ 2,604 $ 8,003 $ 75,244 Special Mention — 465 — 92 — 725 — 1,282 Substandard — — — — — 69 — 69 Total Real estate construction $ 19,766 $ 40,223 $ 3,953 $ 1,252 $ — $ 3,398 $ 8,003 $ 76,595 Home equity lines of credit Pass $ 300 $ 99 $ — $ — $ — $ 131 $ 5,235 $ 5,765 Special Mention — — — — — — 727 727 Substandard — — — — — 362 — 362 Total Home equity lines of credit $ 300 $ 99 $ — $ — $ — $ 493 $ 5,962 $ 6,854 Performance Rated: Residential mortgage Performing $ 33,884 $ 45,221 $ 14,878 $ 16,184 $ 9,059 $ 108,021 $ 156 $ 227,403 Nonperforming — — — — — 848 — 848 Total Residential Mortgage $ 33,884 $ 45,221 $ 14,878 $ 16,184 $ 9,059 $ 108,869 $ 156 $ 228,251 Home equity lines of credit Performing $ 23 $ 38 $ — $ 13 $ 94 $ 4,742 $ 77,745 $ 82,655 Nonperforming — — — — — 92 562 654 Total Home equity lines of credit $ 23 $ 38 $ — $ 13 $ 94 $ 4,834 $ 78,307 $ 83,309 Consumer Performing $ 2,351 $ 2,685 $ 778 $ 522 $ 271 $ 1,085 $ 2,259 $ 9,951 Nonperforming — — — — — — 3 3 Total Consumer $ 2,351 $ 2,685 $ 778 $ 522 $ 271 $ 1,085 $ 2,262 $ 9,954 Year-to-date gross charge-offs $ 48 $ 83 $ 42 $ 55 $ 23 $ 78 $ 67 $ 396 Real estate construction Performing $ 5,571 $ 753 $ 175 $ 210 $ 170 $ 867 $ — $ 7,746 Total Real estate construction $ 5,571 $ 753 $ 175 $ 210 $ 170 $ 867 $ — $ 7,746 Total Portfolio loans Pass $ 207,689 $ 244,495 $ 210,808 $ 92,450 $ 90,270 $ 334,815 $ 52,423 $ 1,232,950 Special Mention 2,643 7,235 6,803 2,922 9,188 19,885 4,797 53,473 Substandard 7 135 499 1,621 713 8,770 2,272 14,017 Performing 41,829 48,697 15,831 16,929 9,594 114,715 80,160 327,755 Nonperforming — — — — — 940 565 1,505 Total Portfolio loans $ 252,168 $ 300,562 $ 233,941 $ 113,922 $ 109,765 $ 479,125 $ 140,217 $ 1,629,700 Year-to-date gross charge-offs $ 48 $ 83 $ 42 $ 55 $ 23 $ 188 $ 67 $ 506 recorded investment in loan classes by internally assigned risk ratings and loan classes by performing and nonperforming status as of December 31, 2022: (In thousands) Commercial Commercial Real Estate Residential Home Equity Consumer Total December 31, 2022 Pass $ 175,633 $ 789,017 $ 78,673 $ 355,888 $ 82,366 $ 11,336 $ 1,492,913 Special Mention 4,035 29,540 1,818 5,803 712 — 41,908 Substandard 1,290 5,554 — 214 385 — 7,443 Total Portfolio Loans $ 180,958 $ 824,111 $ 80,491 $ 361,905 $ 83,463 $ 11,336 $ 1,542,264 Performing Loans $ 180,177 $ 822,238 $ 80,491 $ 361,200 $ 82,965 $ 11,336 $ 1,538,407 Nonperforming Loans 781 1,873 — 705 498 — 3,857 Total Portfolio Loans $ 180,958 $ 824,111 $ 80,491 $ 361,905 $ 83,463 $ 11,336 $ 1,542,264
Financing Receivable, Loan Portfolio Class	The following table summarizes the allowance for credit losses by loan portfolio class for the year ended December 31, 2023: (In thousands) Commercial Commercial Real Estate Residential Home Equity Consumer Unallocated Total Allowance for Credit Losses Beginning balance - January 1, 2023 $ 2,848 $ 10,016 $ 1,000 $ 3,029 $ 347 $ 376 $ 245 $ 17,861 Impact of CECL adoption (762) 1,106 1,347 297 17 (142) (245) 1,618 Charge-offs (110) — — — — (396) — (506) Recoveries 64 — — — — 72 — 136 Provisions (credits) 8 888 (277) (23) 33 231 — 860 Ending balance - December 31, 2023 $ 2,048 $ 12,010 $ 2,070 $ 3,303 $ 397 $ 141 $ — $ 19,969 The following table summarizes the allowance for loan losses by loan portfolio class for the year ended December 31, 2022: (In thousands) Commercial Commercial Real Estate Residential Home Equity Consumer Unallocated Total Allowance for Loan Losses Beginning balance - January 1, 2022 $ 3,176 $ 10,716 $ 616 $ 3,235 $ 501 $ 408 $ 381 $ 19,033 Charge-offs (238) (831) — (3) (33) (181) — (1,286) Recoveries 58 — — 5 22 29 — 114 Provisions (credits) (148) 131 384 (208) (143) 120 (136) — Ending balance - December 31, 2022 $ 2,848 $ 10,016 $ 1,000 $ 3,029 $ 347 $ 376 $ 245 $ 17,861 The following summarizes information relative to individually evaluated loans by loan portfolio class as of December 31, 2022: Individually Evaluated Loans with Allowance Individually Evaluated Loans with (In thousands) Recorded Unpaid Related Recorded Unpaid December 31, 2022 Commercial and industrial $ 781 $ 781 $ 628 $ — $ — Commercial real estate 350 350 192 4,984 4,984 Total $ 1,131 $ 1,131 $ 820 $ 4,984 $ 4,984
Average Of Impaired Loans And Related Interest Income By Loan Portfolio Class	The following summarizes information in regards to the average of individually evaluated loans and related interest income by loan portfolio class as of December 31, 2022: Individually Evaluated Loans with Individually Evaluated Loans with (In thousands) Average Interest Average Interest December 31, 2022 Commercial and industrial $ 991 $ — $ 2 $ — Commercial real estate 856 — 5,566 589 Total $ 1,847 $ — $ 5,568 $ 589

PREMISES AND EQUIPMENT (Tables)

PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Premises and equipment	Premises and equipment were as follows at December 31: (In thousands) 2023 2022 Land $ 5,418 $ 5,418 Buildings and improvements 33,249 32,515 Furniture and equipment 14,813 14,598 Construction in process 81 8 Total premises and equipment 53,561 52,539 Accumulated depreciation (27,278) (25,486) Premises and equipment, net $ 26,283 $ 27,053

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Supplemental Balance Sheet Information	The following ROU assets and lease liabilities are reported within the Consolidated Statements of Condition as follows: (In thousands) December 31, 2023 December 31, 2022 Operating Leases: ROU assets $ 2,615 $ 3,162 Lease liabilities 2,615 3,162 Weighted average remaining lease term 4.7 years 5.0 years Weighted average discount rate 5.61 % 5.42 % Supplemental cash flow information related to operating leases for the years ended December 31: (In thousands) 2023 2022 Operating cash flows from operating leases $ 924 $ 964
Future Minimum Rental Payments	The following summarizes the remaining scheduled future minimum lease payments for operating leases as of December 31, 2023: Year (In thousands) 2024 $ 827 2025 785 2026 632 2027 428 2028 393 Thereafter 367 Total minimum lease payments 3,432 Less: amount representing interest (1) 817 Present value of net minimum lease payments $ 2,615 _______________________________ (1) Amount necessary to reduce net minimum lease payments to present value calculated at the Corporation’s incremental borrowing rate.

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2023
Business Combinations [Abstract]
Carrying Value And Accumulated Amortization Of The Intangible Assets (RIG Customer Lists and New Windsor Core Deposit Intangibles)	The carrying value and accumulated amortization of the intangible assets and core deposit intangibles are as follows: 2023 2022 (Dollars in thousands) Gross Accumulated Amortization Gross Accumulated Amortization ACNB Insurance Services - amortizing intangible assets $ 16,331 $ 8,956 $ 16,151 $ 8,177 Core deposit intangibles 5,978 4,271 5,978 3,620 $ 22,309 $ 13,227 $ 22,129 $ 11,797
Expected Amortization Expense	The following table shows the amortization expense of the intangible assets for future periods: Year (in thousands) 2024 $ 1,244 2025 1,115 2026 1,004 2027 857 2028 711 Thereafter 4,151 $ 9,082

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2023
Interest-Bearing Deposit Liabilities [Abstract]
Schedule Of Deposits	Deposits were comprised of the following as of December 31: (In thousands) 2023 2022 Noninterest-bearing demand deposits $ 500,332 $ 595,049 Interest-bearing demand deposits 524,289 592,586 Money market 264,907 310,911 Savings 340,134 407,299 Total demand and savings 1,629,662 1,905,845 Time 232,151 293,130 Total deposits $ 1,861,813 $ 2,198,975
Schedule Of Maturities Of Time Certificates Of Deposits	Scheduled maturities of time certificates of deposit at December 31, 2023, were as follows ( in thousands ): Time Deposits Year Less than $250,000 $250,000 or more 2024 $ 145,891 $ 39,351 2025 30,168 3,780 2026 6,643 254 2027 4,322 — 2028 1,726 — Thereafter 16 — $ 188,766 $ 43,385

BORROWINGS (Tables)

BORROWINGS (Tables)	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Schedule of Short-term Debt	Short-term borrowings and weighted-average interest rates at December 31 are as follows: 2023 2022 (Dollars in thousands) Amount Rate Amount Rate Securities sold under repurchase agreements $ 26,882 0.15 % $ 41,954 0.12 % FHLB Advances 30,000 5.64 — — Total $ 56,882 3.05 % $ 41,954 0.12 %
Schedule of Maturities of Long-term Debt	A summary of long-term borrowings and their weighted-average contractual rates as of December 31 is as follows: 2023 2022 (Dollars in thousands) Amount Rate Amount Rate FHLB fixed-rate advances maturing: 2026 $ 80,000 4.71 % $ — — % 2027 60,000 4.64 — — 2028 35,000 4.23 — — Trust preferred subordinated debt 5,292 7.28 6,000 3.21 Subordinated debt 15,000 4.00 15,000 4.00 $ 195,292 4.62 % $ 21,000 3.78 %

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis	The following tables present assets measured at fair value and the basis of measurement used at December 31: 2023 (In thousands) Basis Level 1 Level 2 Level 3 Total Equity securities with readily determinable fair values Recurring $ 928 $ — $ — $ 928 AFS Investment Securities: U.S. Government and agencies — 156,795 — 156,795 Mortgage-backed securities — 265,204 — 265,204 Corporate bonds — 29,694 — 29,694 Total AFS Investment Securities Recurring — 451,693 — 451,693 Loans held for sale Recurring — 280 — 280 Individually evaluated loans Non-recurring — — 242 242 Foreclosed assets held for resale Non-recurring — — 467 467 2022 (In thousands) Basis Level 1 Level 2 Level 3 Total Equity securities with readily determinable fair values Recurring $ 1,719 $ — $ — $ 1,719 AFS Investment Securities: U.S. Government and agencies — 210,999 — 210,999 Mortgage-backed securities — 295,718 — 295,718 State and municipal — 15,235 — 15,235 Corporate bonds — 31,602 — 31,602 Total AFS Investment Securities Recurring — 553,554 — 553,554 Loans held for sale Recurring — 123 — 123 Individually evaluated loans Non-recurring — — 3,773 3,773 Foreclosed assets held for resale Non-recurring — — 474 474
Fair Value Inputs, Assets, Quantitative Information	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value as of December 31: (Dollars in thousands) Fair Value Estimate Valuation Technique Unobservable Input Range Weighted Average 2023 Individually evaluated loans $ 242 Appraisal of collateral (1) Appraisal adjustments (2) (33)%–(100)% (94) % 2022 Individually evaluated loans $ 3,773 Appraisal of collateral (1) Appraisal adjustments (2) (10)%–(50)% (48) % _______________________________ (1) Fair value is generally determined through management’s estimate or independent third-party appraisals of the underlying collateral, which generally includes various Level 3 inputs which are not observable. (2) Appraisals may be adjusted downward by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percentage of the appraisal. Higher downward adjustments are caused by negative changes to the collateral or conditions in the real estate market, actual offers or sales contracts received, and/or age of the appraisal
Fair Value, by Balance Sheet Grouping	The following tables present the carrying amount and the estimated fair value of the Corporation’s financial instruments as of December 31: 2023 Estimated Fair Value (In thousands) Carrying Amount Total Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 21,442 $ 21,442 $ 7,063 $ 14,379 $ — Interest-bearing deposits with banks 44,516 44,516 44,516 — — Equity securities with readily determinable fair values 928 928 928 — — Investment securities available for sale 451,693 451,693 — 451,693 — Investment securities held to maturity 64,600 59,057 — 59,057 — Loans held for sale 280 280 — 280 — Loans, net 1,608,019 1,562,703 — — 1,562,703 Accrued interest receivable 8,080 8,080 — 8,080 — Restricted investment in bank stocks 9,677 9,677 — 9,677 — Financial liabilities: Demand deposits, savings, and money markets 1,629,662 1,391,709 — 1,391,709 — Time deposits 232,151 221,770 — 221,770 — Securities sold under repurchase agreements 26,882 23,666 — 23,666 — FHLB Advances 205,000 206,950 — 206,950 — Trust preferred and subordinated debt 20,292 16,992 — 16,992 — Accrued interest payable 794 794 — 794 — 2022 Estimated Fair Value (In thousands) Carrying Amount Total Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $40,067 $40,067 $6,977 $33,090 $— Interest-bearing deposits with banks 128,094 128,094 128,094 — — Equity securities with readily determinable fair values 1,719 1,719 1,719 — — Investment securities available for sale 553,554 553,554 — 553,554 — Investment securities held to maturity 64,977 58,078 — 58,078 — Loans held for sale 123 123 — 123 — Loans, net 1,520,749 1,458,556 — — 1,458,556 Accrued interest receivable 6,915 6,915 — 6,915 — Restricted investment in bank stocks 1,629 1,629 — 1,629 — Financial liabilities: Demand deposits, savings, and money markets 1,905,845 1,905,845 — 1,905,845 — Time deposits 293,130 276,182 — 276,182 — Securities sold under repurchase agreements 41,954 41,954 — 41,954 — Trust preferred and subordinated debt 21,000 18,648 — 18,648 — Accrued interest payable 51 51 — 51 —

RETIREMENT PLANS (Tables)

RETIREMENT PLANS (Tables)	12 Months Ended
	Dec. 31, 2023
Postemployment Benefits [Abstract]
Schedule of Benefit Plan Funded Status	The following table summarized the changes in the projected benefit obligation and fair value of plan assets for the plan years ended December 31: (In thousands) 2023 2022 Change in benefit obligation: Projected Benefit obligation at beginning of year $ 30,226 $ 39,123 Service cost 495 777 Interest cost 1,493 1,052 Actuarial gain (loss) 983 (9,141) Benefits paid (1,703) (1,585) Projected benefit obligation at end of year 31,494 30,226 Change in plan assets, at fair value: Fair value of plan assets at beginning of year 43,119 50,218 Actual return on plan assets 5,011 (5,514) Benefits paid (1,703) (1,585) Fair value of plan assets at end of year 46,427 43,119 Funded Status, included in other assets $ 14,933 $ 12,893
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)	The amounts recognized in accumulated other comprehensive income (loss) are as follows: (In thousands) 2023 2022 Total net actuarial loss (pre-tax) $ 5,120 $ 6,887
Assumptions Used To Determine The Benefit Obligation and Net Periodic Benefit Cost (Income)	For the years ended December 31, 2023 and 2022, the assumptions used to determine the benefit obligation are as follows: 2023 2022 Discount rate 4.90 % 5.10 % Rate of compensation increase 3.50 % 3.50 % The assumptions used to determine the net periodic benefit cost (income) are as follows for the years ended December 31: 2023 2022 Discount rate 5.10 % 2.75 % Expected long-term rate of return on plan assets 6.75 % 6.75 % Rate of compensation increase 3.50 % 3.50 %
Components Of Net Periodic Benefit Costs (Income)	The components of net periodic benefit cost (income) related to the non-contributory, defined benefit pension plan are as follows for the years ended December 31 : (In thousands) 2023 2022 Components of net periodic benefit cost (income): Service cost $ 495 $ 777 Interest cost 1,493 1,052 Expected return on plan assets (2,653) (3,136) Recognized net actuarial loss 392 407 Net Periodic Benefit Income (273) (900) Net gain (1,375) (491) Amortization of net loss (392) (407) Total recognized in other comprehensive income (loss) (1,767) (898) Total recognized in net periodic benefit cost (income) and other comprehensive income $ (2,040) $ (1,798)
Schedule of Accumulated and Projected Benefit Obligations	The Corporation’s comparison of obligations to plan assets at December 31, 2023 and 2022 are as follows: (In thousands) 2023 2022 Projected benefit obligation $ 31,494 $ 30,226 Accumulated benefit obligation 30,411 29,150 Fair value of plan assets at measurement date 46,427 43,119
Future Benefit Payments	For the year ended December 31, 2023 the mortality assumption was updated to reflect the most recently published mortality information through October 2023. Estimated future benefit payments are as follows: Year (in thousands) 2024 $ 2,010 2025 2,060 2026 2,070 2027 2,060 2028 2,060 2029-2033 10,750
Pension Plan Weighted-Average Assets' Allocations	The Corporation’s pension plan weighted-average assets’ allocations at December 31, 2023 and 2022, are as follows: 2023 2022 Equity securities 43 % 46 % Debt securities 54 49 Real property 3 5 100 % 100 %
Fair Value Measurements	Fair value measurements were as follows: (In thousands) Total Level 1 Level 2 Level 3 December 31, 2023 Equity securities $ 20,123 $ 3,876 $ 16,247 $ — Debt securities 24,891 — 24,891 — Real estate 1,413 — 1,413 — Total $ 46,427 $ 3,876 $ 42,551 $ — December 31, 2022 Equity securities $ 19,749 $ 3,339 $ 16,410 $ — Debt securities 21,228 — 21,228 — Real estate 2,142 — 2,142 — Total $ 43,119 $ 3,339 $ 39,780 $ —

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense were as follows: (In thousands) 2023 2022 Current: Federal $ 7,924 $ 7,461 State (534) 1,259 Total 7,390 8,720 Deferred: Federal 755 592 State 16 (113) Total 771 479 Provision for income taxes $ 8,161 $ 9,199
Schedule of Reconciliations of the Statutory Federal Income Tax	The differences between the ETR and the federal statutory income tax rate are as follows: 2023 2022 Federal income tax at statutory rate 21.0 % 21.0 % State income taxes, net of federal benefit 1.5 1.8 Tax-exempt income (1.3) (1.1) Earnings on investment in bank-owned life insurance (1.0) (0.7) Tax credit benefits — (0.6) Other 0.3 0.1 Effective income tax rate 20.5 % 20.5 %
Components of Deferred Tax Assets and Liabilities	The net deferred tax asset recorded by the Corporation is included in other assets and consists of the following tax effects of temporary differences as of December 31: (In thousands) 2023 2022 Deferred tax assets: Investment securities available for sale $ 12,052 $ 15,210 Allowance for credit losses 4,533 4,128 Accrued deferred compensation 1,166 1,064 Pension 1,162 1,608 Deferred director fees 1,097 978 Other 783 719 Lease liability 742 731 Nonaccrual interest 740 792 Allowance for unfunded commitments 390 — Accumulated depreciation 3 — Purchase accounting — 149 Total gross deferred tax assets 22,668 25,379 Deferred tax liabilities: Prepaid benefit cost 4,552 4,571 Goodwill and intangibles, net 1,439 1,462 Right of use asset 742 731 Prepaid expenses 67 179 Deferred loan fees 57 66 Accumulated depreciation — 208 Purchase accounting 25 — Total gross deferred tax liabilities 6,882 7,217 Net deferred tax asset $ 15,786 $ 18,162

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	12 Months Ended
	Dec. 31, 2023
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
The Actual and Required Capital Amounts and Ratios	The actual and required regulatory capital levels, leverage ratios and risk-based capital ratios as of December 31: Actual For Capital Adequacy To be Well Capitalized under Prompt Corrective Action Provisions (2) (Dollars in thousands) Amount Ratio Amount (1) Ratio (1) Amount Ratio CORPORATION 2023 Tier 1 Leverage Capital (to average assets) $ 280,135 11.57 % $ 96,822 4.0% N/A N/A Common Equity Tier 1 Capital (to risk-weighted assets) 274,844 15.16 81,562 4.5 N/A N/A Tier 1 Capital (to risk-weighted assets) 280,135 15.46 108,749 6.0 N/A N/A Total Capital (to risk-weighted assets) 315,564 17.41 144,999 8.0 N/A N/A 2022 Tier 1 Leverage Capital (to average assets) $ 258,468 9.91 % $ 104,372 4.0% N/A N/A Common Equity Tier 1 Capital (to risk-weighted assets) 252,468 15.00 75,733 4.5 N/A N/A Tier 1 Capital (to risk-weighted assets) 258,468 15.36 100,978 6.0 N/A N/A Total Capital (to risk-weighted assets) 291,421 17.32 134,637 8.0 N/A N/A ACNB BANK 2023 Tier 1 Leverage Capital (to average assets) $ 268,314 11.12 % $ 96,494 4.0% $ 120,618 5.0% Common Equity Tier 1 Capital (to risk-weighted assets) 268,314 14.86 81,260 4.5 117,375 6.5 Tier 1 Capital (to risk-weighted assets) 268,314 14.86 108,346 6.0 144,462 8.0 Total Capital (to risk-weighted assets) 288,742 15.99 144,462 8.0 180,577 10.0 2022 Tier 1 Leverage Capital (to average assets) $ 246,184 9.50 % $ 103,690 4.0% $ 129,612 5.0% Common Equity Tier 1 Capital (to risk-weighted assets) 246,184 14.68 75,441 4.5 108,971 6.5 Tier 1 Capital (to risk-weighted assets) 246,184 14.68 100,588 6.0 134,118 8.0 Total Capital (to risk-weighted assets) 264,137 15.76 134,118 8.0 167,647 10.0 _______________________________ (1) Amounts and ratios do not include capital conservation buffer. (2) N/A - Not applicable as “well capitalized” applies only to banks.

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2023
Risks and Uncertainties [Abstract]
Schedule of Fair Value, Off-balance Sheet Risks	A summary of the Corporation’s commitments at December 31 were as follows: (In thousands) 2023 2022 Commitments to extend credit $ 403,300 $ 401,786 Standby letters of credit 21,029 11,429

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2023
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Years Ended December 31, 2023 2022 Weighted average shares outstanding (basic) 8,507,803 8,623,012 Unvested shares 28,322 — Weighted average shares outstanding (diluted) 8,536,125 8,623,012 Per share: Basic $ 3.72 $ 4.15 Diluted 3.71 4.15

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Schedule Of Components Of The Accumulated Other Comprehensive Loss, Net Of Taxes	The components of the accumulated other comprehensive loss, net of taxes, are as follows: (In thousands) Unrealized (Losses) Gains on Pension Accumulated Balance at December 31, 2021 $ (3,474) $ (6,071) $ (9,545) Amounts reclassified from accumulated other comprehensive loss, net of tax: Unrealized losses on AFS securities, net of tax (50,192) — (50,192) Realized losses on securities, net of tax 193 — 193 Amortization of unrealized losses on securities transferred to HTM, net of tax 739 — 739 Amortization of pension net loss, transition liability and prior service cost, net of tax — 317 317 Unrecognized pension net gain, net of tax — 476 476 Net current period other comprehensive (loss) income (49,260) 793 (48,467) Balance at December 31, 2022 (52,734) (5,278) (58,012) Amounts reclassified from accumulated other comprehensive loss, net of tax: Unrealized gain on AFS securities, net of tax 6,814 — 6,814 Realized losses on securities, net of tax 4,052 — 4,052 Amortization of unrealized losses on securities transferred to HTM, net of tax 916 — 916 Amortization of pension net loss, transition liability and prior service cost, net of tax — 258 258 Unrecognized pension net gain, net of tax — 1,063 1,063 Net current period other comprehensive income 11,782 1,321 13,103 Balance at December 31, 2023 $ (40,952) $ (3,957) $ (44,909)

ACNB CORPORATION (PARENT COMP_2

ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
Statements of Condition	December 31, (In thousands) 2023 2022 ASSETS Cash $ 16,647 $ 18,263 Investment in banking subsidiary 258,748 225,806 Investment in other subsidiaries 20,023 18,757 Securities and other assets 1,107 1,797 Receivable from banking subsidiary 1,355 1,508 Total Assets $ 297,880 $ 266,131 LIABILITIES AND STOCKHOLDERS’ EQUITY Long-term borrowings $ 20,292 $ 21,000 Other liabilities 127 89 Stockholders’ equity 277,461 245,042 Total Liabilities and Stockholders’ Equity $ 297,880 $ 266,131
Statements of Income	Years Ended December 31, (In thousands) 2023 2022 Dividends from banking subsidiary $ 9,702 $ 9,117 Net (loss) gain on sales of securities (7) 13 Other Income 41 519 9,736 9,649 Expenses 1,934 1,653 7,802 7,996 Income tax benefit 413 516 8,215 8,512 Equity in undistributed earnings of subsidiaries 23,473 27,240 Net Income $ 31,688 $ 35,752 Comprehensive Income (Loss) $ 44,791 $ (12,715)
Statements of Cash Flows	Years Ended December 31, (In thousands) 2023 2022 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 31,688 $ 35,752 Equity in undistributed earnings of subsidiaries (23,473) (27,240) (Increase) decrease in receivable from banking subsidiary 153 (311) Gain on sale of equity securities (7) (13) Mark-to-market gain on equity securities — 177 Gain on sale of low-income housing partnership — (421) Other 439 (308) Net Cash Provided by Operating Activities 8,800 7,636 CASH FLOWS FROM INVESTING ACTIVITIES Return on investment from subsidiary — 13,000 Proceeds from sale of low-income housing partnership — 421 Proceeds from sale of equity securities 592 811 Net Cash Used in Investing Activities 592 14,232 CASH FLOWS USED IN FINANCING ACTIVITIES Repayments on long-term borrowings — (2,700) Dividends paid (9,702) (9,117) Common stock repurchased (2,027) (6,681) Common stock issued 721 1,442 Net Cash Used in Financing Activities (11,008) (17,056) Net Increase (Decrease) in Cash and Cash Equivalents (1,616) 4,812 CASH AND CASH EQUIVALENTS — BEGINNING 18,263 13,451 CASH AND CASH EQUIVALENTS — ENDING $ 16,647 $ 18,263

SEGMENT AND RELATED INFORMATI_2

SEGMENT AND RELATED INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Segment Information	Segment information for the years ended December 31: (In thousands) Banking Insurance Total 2023 Interest income and other income from external customers $ 105,766 $ 9,319 $ 115,085 Interest expense 8,320 — 8,320 Depreciation and amortization expense 2,515 847 3,362 Income before income taxes 38,148 1,701 39,849 Total assets 2,399,151 19,696 2,418,847 Goodwill 35,800 8,385 44,185 Capital expenditures 424 744 1,168 2022 Interest income and other income from external customers $ 101,240 $ 7,616 $ 108,856 Interest expense 3,591 33 3,624 Depreciation and amortization expense 2,995 801 3,796 Income before income taxes 43,639 1,312 44,951 Total assets 2,505,353 20,154 2,525,507 Goodwill 35,800 8,385 44,185 Capital expenditures 1,783 28 1,811

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) $ in Thousands		12 Months Ended
	Feb. 24, 2019	Dec. 31, 2023 USD ($) bank shares	Dec. 31, 2022 USD ($) shares	Jan. 01, 2023 USD ($)	Dec. 31, 2021 USD ($)	Mar. 08, 2019 shares	Mar. 20, 2018 shares
Summary of Significant Accounting Policies [Line Items]
Number of community banking office locations, ACNB | bank		26
Assets Held-in-trust		$ 639,400	$ 518,800
Number of minimum months for corporation to order updated valuation		18 months
Post-employment benefit cost for continuing life insurance		$ 214	$ 81
Weighted average shares outstanding, basic (in shares) | shares		8,507,803	8,623,012
Foreclosed assets held for resale		$ 467	$ 474
Less: Allowance for credit losses		(19,969)	(17,861)	$ (17,861)	$ (19,033)
Unfunded Loan Commitment
Summary of Significant Accounting Policies [Line Items]
Provision for credit losses		$ (16)	0
Revision of Prior Period, Adjustment
Summary of Significant Accounting Policies [Line Items]
Financing Receivable, Allowance for Credit Loss, Total Adjustment				3,300
Less: Allowance for credit losses				(1,618)
Cumulative Effect, Period of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Less: Allowance for credit losses			(1,618)
Adams, Cumberland, Franklin and York Counties, Pennsylvania
Summary of Significant Accounting Policies [Line Items]
Number of community banking office locations, ACNB | bank		17
Carroll and Frederick Counties, Maryland
Summary of Significant Accounting Policies [Line Items]
Number of community banking office locations, ACNB | bank		9
Minimum
Summary of Significant Accounting Policies [Line Items]
Remaining lease terms		1 year
Initial term greater than		12 months
Maximum
Summary of Significant Accounting Policies [Line Items]
Remaining lease terms		8 years
Residential Mortgage and Commercial Loans
Summary of Significant Accounting Policies [Line Items]
Threshold period past due to discontinue accrual interest on financing receivable		90 days
Consumer
Summary of Significant Accounting Policies [Line Items]
Threshold period past due for charge off of financing receivable		120 days
Less: Allowance for credit losses		$ (141)	(376)	(376)	(408)
Consumer | Revision of Prior Period, Adjustment
Summary of Significant Accounting Policies [Line Items]
Less: Allowance for credit losses				142
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Less: Allowance for credit losses			142
Commercial real estate
Summary of Significant Accounting Policies [Line Items]
Less: Allowance for credit losses		$ (12,010)	(10,016)	(10,016)	$ (10,716)
Commercial real estate | Outstanding Debt Benchmark | Credit Concentration Risk
Summary of Significant Accounting Policies [Line Items]
Percentage of loan risk		60.90%
Commercial real estate | Revision of Prior Period, Adjustment
Summary of Significant Accounting Policies [Line Items]
Less: Allowance for credit losses				$ (1,106)
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Less: Allowance for credit losses			(1,106)
Commercial real estate | Maximum
Summary of Significant Accounting Policies [Line Items]
Financing receivable term		20 years
Loan-to-value ratio (no greater than)		80%
Residential Mortgage
Summary of Significant Accounting Policies [Line Items]
Loan-to-value ratio that requires private mortgage insurance (in excess of)		80%
Residential Mortgage | Maximum
Summary of Significant Accounting Policies [Line Items]
Financing receivable term		30 years
Loan-to-value ratio (no greater than)		80%
Home Equity Line of Credit | Maximum
Summary of Significant Accounting Policies [Line Items]
Financing receivable term		20 years
Loan-to-value ratio (no greater than)		90%
Buildings
Summary of Significant Accounting Policies [Line Items]
Useful life		40 years
Building Remodels and Additions
Summary of Significant Accounting Policies [Line Items]
Useful life		15 years
Furniture and equipment | Minimum
Summary of Significant Accounting Policies [Line Items]
Useful life		3 years
Furniture and equipment | Maximum
Summary of Significant Accounting Policies [Line Items]
Useful life		15 years
Core Deposits
Summary of Significant Accounting Policies [Line Items]
Intangible asset amortization life		10 years
Customer Lists | Minimum
Summary of Significant Accounting Policies [Line Items]
Intangible asset amortization life		8 years
Customer Lists | Maximum
Summary of Significant Accounting Policies [Line Items]
Intangible asset amortization life		15 years
ACNB Corporation 2009 Restricted Stock Plan
Summary of Significant Accounting Policies [Line Items]
2009 Restricted Stock plan, expiration period	10 years
2009 Restricted Stock Plan, number of shares authorized, but not issued (in shares) | shares						174,055
ACNB Corporation 2018 Omnibus Stock Incentive Plan | Restricted Stock
Summary of Significant Accounting Policies [Line Items]
Shares issued under plan since inception (in shares) | shares		99,381
Compensation expense		$ 1,000	$ 729
Non-vested number of shares (in shares) | shares		32,993
Awards authorized (in shares) | shares							400,000
Real Estate
Summary of Significant Accounting Policies [Line Items]
Threshold period past due for Corporation to order updated valuation on financing receivable		90 days
Number of previous months with no updated valuation completed for Corporation to update validation		12 months
Number of maximum days of loan being classified as impaired for Corporation to order third party valuation		30 days

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Components Of The Accumulated Other Comprehensive Income, Net Of Taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	$ (19,969)	$ (17,861)	$ (17,861)	$ (19,033)
Loans, net	1,608,019	1,520,749	1,520,749
Net deferred tax asset	15,786	17,718	18,162
Allowance for unfunded commitments	1,719	92	92
Retained earnings	213,491	245,042	193,873
Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(19,479)
Loans, net		1,519,131
Net deferred tax asset		18,452
Allowance for unfunded commitments		1,735
Retained earnings		242,674
Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(1,618)
Loans, net		1,618
Net deferred tax asset		734
Allowance for unfunded commitments		1,643
Retained earnings		2,368
Commercial and industrial
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	(2,048)	(2,848)	(2,848)	(3,176)
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(2,086)
Commercial and industrial | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		762
Commercial real estate
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	(12,010)	(10,016)	(10,016)	(10,716)
Commercial real estate | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(11,122)
Commercial real estate | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(1,106)
Commercial real estate construction
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	(2,070)	(1,000)	(1,000)	(616)
Commercial real estate construction | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(2,347)
Commercial real estate construction | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(1,347)
Residential mortgage
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	(3,303)	(3,029)	(3,029)	(3,235)
Residential mortgage | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(3,326)
Residential mortgage | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(297)
Home equity lines of credit
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	(397)	(347)	(347)	(501)
Home equity lines of credit | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(364)
Home equity lines of credit | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(17)
Consumer
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	(141)	(376)	(376)	(408)
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		(234)
Consumer | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		142
Unallocated
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses	$ 0	(245)	$ (245)	$ (381)
Unallocated | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		0
Unallocated | Revision of Prior Period, Adjustment
Accumulated Other Comprehensive Loss [Line Items]
Less: Allowance for credit losses		$ 245

INVESTMENT SECURITIES (Unrealiz

INVESTMENT SECURITIES (Unrealized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Apr. 01, 2022
Schedule of Investments [Line Items]
Securities Available for sale, Amortized Cost	$ 501,912	$ 617,641
Securities Available for sale, Gross Unrealized Gains	565	553
Securities Available for sale, Gross Unrealized Losses	50,784	64,640
Securities Available for sale, Fair Value	451,693	553,554	$ 39,700
Securities Held to maturity, Amortized Cost	64,600	64,977
Securities Held to maturity, Gross Unrealized Gains	0	0
Securities Held to maturity, Gross Unrealized Losses	5,543	6,899
Securities held to maturity, fair value	59,057	58,078
U.S. Government and agencies
Schedule of Investments [Line Items]
Securities Available for sale, Amortized Cost	176,458	241,467
Securities Available for sale, Gross Unrealized Gains	0	0
Securities Available for sale, Gross Unrealized Losses	19,663	30,468
Securities Available for sale, Fair Value	156,795	210,999
Mortgage-backed securities, residential
Schedule of Investments [Line Items]
Securities Available for sale, Amortized Cost	293,128	327,535
Securities Available for sale, Gross Unrealized Gains	363	342
Securities Available for sale, Gross Unrealized Losses	28,287	32,159
Securities Available for sale, Fair Value	265,204	295,718
Securities Held to maturity, Amortized Cost	2,467	3,279
Securities Held to maturity, Gross Unrealized Gains	0	0
Securities Held to maturity, Gross Unrealized Losses	124	194
Securities held to maturity, fair value	2,343	3,085
State and municipal
Schedule of Investments [Line Items]
Securities Available for sale, Amortized Cost		15,235
Securities Available for sale, Gross Unrealized Gains		196
Securities Available for sale, Gross Unrealized Losses		196
Securities Available for sale, Fair Value		15,235
Securities Held to maturity, Amortized Cost	62,133	61,698
Securities Held to maturity, Gross Unrealized Gains	0	0
Securities Held to maturity, Gross Unrealized Losses	5,419	6,705
Securities held to maturity, fair value	56,714	54,993
Corporate bonds
Schedule of Investments [Line Items]
Securities Available for sale, Amortized Cost	32,326	33,404
Securities Available for sale, Gross Unrealized Gains	202	15
Securities Available for sale, Gross Unrealized Losses	2,834	1,817
Securities Available for sale, Fair Value	$ 29,694	$ 31,602

INVESTMENT SECURITIES (Schedule

INVESTMENT SECURITIES (Schedule of Required Fair Value Disclosures for Equity Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair Value at beginning of period	$ 1,719	$ 2,609
Purchases	0	206
Sales/reclassification	798	811
Gains/(Losses)	18	(298)
(Losses)/Gains on sales of securities	(11)	13
Fair Value at end of period	928	1,719
Stock in other banks
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair Value at beginning of period	598	1,573
Purchases	0	0
Sales/reclassification	592	811
Gains/(Losses)	5	(177)
(Losses)/Gains on sales of securities	(11)	13
Fair Value at end of period	0	598
Canapi Ventures SBIC Fund
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair Value at beginning of period	206	0
Purchases	0	206
Sales/reclassification	206	0
Gains/(Losses)	0	0
(Losses)/Gains on sales of securities	0	0
Fair Value at end of period	0	206
CRA Mutual Fund
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair Value at beginning of period	915	1,036
Purchases	0	0
Sales/reclassification	0	0
Gains/(Losses)	13	(121)
(Losses)/Gains on sales of securities	0	0
Fair Value at end of period	$ 928	$ 915

INVESTMENT SECURITIES (Schedu_2

INVESTMENT SECURITIES (Schedule of Unrealized Loss on Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Securities Available for sale, Less than 12 Months: Fair Value	$ 0	$ 277,241
Securities Available for sale, Less than 12 Months: Unrealized Losses	0	22,236
Securities Available for sale, 12 Months or More: Fair Value	402,517	253,968
Securities Available for sale, 12 Months or More: Unrealized Losses	50,784	42,404
Securities Available for sale, Total: Fair Value	402,517	531,209
Securities Available for sale, Total Unrealized Loss	50,784	64,640
Securities Held to maturity, Less than 12 Months: Fair Value	0	41,171
Securities Held to maturity, Less than 12 Months: Unrealized Losses	0	4,069
Securities Held to maturity, 12 Months or More, Fair Value	59,057	16,907
Securities Held to maturity, 12 Months or More, Unrealized Losses	5,543	2,830
Securities Held to maturity, Total: Fair Value	59,057	58,078
Securities Held to maturity, Total Unrealized Losses	5,543	6,899
Equity securities with readily determinable fair values	928	1,719	$ 2,609
Payments to Acquire Equity Securities, FV-NI	0	206
Sales/reclassification	798	811
Gains/(Losses)	18	(298)
(Losses)/Gains on sales of securities	(11)	13
U.S. Government and agencies
Schedule of Investments [Line Items]
Securities Available for sale, Less than 12 Months: Fair Value	0	25,426
Securities Available for sale, Less than 12 Months: Unrealized Losses	0	1,461
Securities Available for sale, 12 Months or More: Fair Value	156,795	185,573
Securities Available for sale, 12 Months or More: Unrealized Losses	19,663	29,007
Securities Available for sale, Total: Fair Value	156,795	210,999
Securities Available for sale, Total Unrealized Loss	19,663	30,468
Mortgage-backed securities, residential
Schedule of Investments [Line Items]
Securities Available for sale, Less than 12 Months: Fair Value	0	221,249
Securities Available for sale, Less than 12 Months: Unrealized Losses	0	19,362
Securities Available for sale, 12 Months or More: Fair Value	230,443	63,145
Securities Available for sale, 12 Months or More: Unrealized Losses	28,287	12,797
Securities Available for sale, Total: Fair Value	230,443	284,394
Securities Available for sale, Total Unrealized Loss	28,287	32,159
Securities Held to maturity, Less than 12 Months: Fair Value	0	3,085
Securities Held to maturity, Less than 12 Months: Unrealized Losses	0	194
Securities Held to maturity, 12 Months or More, Fair Value	2,343	0
Securities Held to maturity, 12 Months or More, Unrealized Losses	124	0
Securities Held to maturity, Total: Fair Value	2,343	3,085
Securities Held to maturity, Total Unrealized Losses	124	194
State and municipal
Schedule of Investments [Line Items]
Securities Available for sale, Less than 12 Months: Fair Value		6,229
Securities Available for sale, Less than 12 Months: Unrealized Losses		196
Securities Available for sale, 12 Months or More: Fair Value		0
Securities Available for sale, 12 Months or More: Unrealized Losses		0
Securities Available for sale, Total: Fair Value		6,229
Securities Available for sale, Total Unrealized Loss		196
Securities Held to maturity, Less than 12 Months: Fair Value	0	38,086
Securities Held to maturity, Less than 12 Months: Unrealized Losses	0	3,875
Securities Held to maturity, 12 Months or More, Fair Value	56,714	16,907
Securities Held to maturity, 12 Months or More, Unrealized Losses	5,419	2,830
Securities Held to maturity, Total: Fair Value	56,714	54,993
Securities Held to maturity, Total Unrealized Losses	5,419	6,705
Corporate bonds
Schedule of Investments [Line Items]
Securities Available for sale, Less than 12 Months: Fair Value	0	24,337
Securities Available for sale, Less than 12 Months: Unrealized Losses	0	1,217
Securities Available for sale, 12 Months or More: Fair Value	15,279	5,250
Securities Available for sale, 12 Months or More: Unrealized Losses	2,834	600
Securities Available for sale, Total: Fair Value	15,279	29,587
Securities Available for sale, Total Unrealized Loss	2,834	1,817
Stock in other banks
Schedule of Investments [Line Items]
Equity securities with readily determinable fair values	0	598	1,573
Payments to Acquire Equity Securities, FV-NI	0	0
Sales/reclassification	592	811
Gains/(Losses)	5	(177)
(Losses)/Gains on sales of securities	(11)	13
CRA Mutual Fund
Schedule of Investments [Line Items]
Equity securities with readily determinable fair values	928	915	1,036
Payments to Acquire Equity Securities, FV-NI	0	0
Sales/reclassification	0	0
Gains/(Losses)	13	(121)
(Losses)/Gains on sales of securities	0	0
Canapi Ventures SBIC Fund
Schedule of Investments [Line Items]
Equity securities with readily determinable fair values	0	206	$ 0
Payments to Acquire Equity Securities, FV-NI	0	206
Sales/reclassification	206	0
Gains/(Losses)	0	0
(Losses)/Gains on sales of securities	$ 0	$ 0

INVESTMENT SECURITIES (Investme

INVESTMENT SECURITIES (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Apr. 01, 2022
Investments, Debt and Equity Securities [Abstract]
Available for sale Securities, Amortized Cost, 1 year or less	$ 15,664
Available for sale Securities, Fair Value, 1 year or less	15,178
Available for sale Securities, Amortized Cost, Over 1 year through 5 years	109,772
Available for sale Securities, Fair Value, Over 1 year through 5 years	99,591
Available for sale Securities, Amortized Cost, Over 5 years through 10 years	81,348
Available for sale Securities, Fair Value, Over 5 years through 10 years	70,242
Available for sale Securities, Amortized Cost, Over 10 years	2,000
Available for sale Securities, Fair Value, Over 10 years	1,478
Available for sale Securities, Amortized Cost, without a Single Maturity Date	293,128
Available for sale Securities, Fair Value, without a Single Maturity Date	265,204
Securities Available for sale, Amortized Cost	501,912	$ 617,641
Investment securities available for sale, at estimated fair value	451,693	553,554	$ 39,700
Held to maturity Securities, Amortized Cost, 1 year or less	0
Held to maturity Securities, Fair Value, 1 year or less	0
Held to maturity Securities, Amortized Cost, Over 1 year through 5 years	1,394
Held to maturity Securities, Fair Value, Over 1 year through 5 years	1,299
Held to maturity Securities, Amortized Cost, Over 5 years through 10 years	25,391
Held to maturity Securities, Fair Value, Over 5 years through 10 years	23,807
Held to maturity Securities, Amortized Cost, Over 10 years	35,348
Held to maturity Securities, Fair Value, Over 10 years	31,608
Held to maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount	2,467
Held to maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value	2,343
Securities Held to maturity, Amortized Cost	64,600	64,977
Investment securities held to maturity	$ 59,057	$ 58,078

INVESTMENT SECURITIES (Narrativ

INVESTMENT SECURITIES (Narrative) (Details) - USD ($)		12 Months Ended
	Apr. 01, 2022	Dec. 31, 2023	Dec. 31, 2022
Schedule of Investments [Line Items]
Proceeds from sales of investment securities available for sale		$ 125,241,000	$ 3,129,000
Purchase of investment securities		48,838,000	284,336,000
Investment securities available for sale, at estimated fair value	$ 39,700,000	451,693,000	553,554,000
Unrealized loss	$ 4,800,000
Carrying value of securities pledged as collateral as required by law on public and trust deposits, repurchase agreements, and for other purposes		233,700,000	342,200,000
U.S. Government and agencies
Schedule of Investments [Line Items]
Investment securities available for sale, at estimated fair value		156,795,000	210,999,000
Corporate bonds
Schedule of Investments [Line Items]
Investment securities available for sale, at estimated fair value		$ 29,694,000	$ 31,602,000

INVESTMENT SECURITIES - Gain (L

INVESTMENT SECURITIES - Gain (Loss) on Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 125,241	$ 4,994
Gross gains	230	14
Gross losses	$ 5,470	$ 248

LOANS AND ALLOWANCE FOR CREDI_3

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Classes Of The Loan Portfolio Summarized By The Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 1,629,700	$ 1,542,264
Unearned income	(1,712)	(3,654)
Total loans, net of unearned income	1,627,988	1,538,610
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	152,344	180,958
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	394,189	361,905
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	898,709	824,111
Commercial real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	84,341	80,491
Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	90,163	83,463
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	9,954	11,336
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,232,950	1,492,913
Pass | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		175,633
Pass | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		355,888
Pass | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		789,017
Pass | Commercial real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		78,673
Pass | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		82,366
Pass | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		11,336
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	53,473	41,908
Special Mention | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		4,035
Special Mention | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		5,803
Special Mention | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		29,540
Special Mention | Commercial real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		1,818
Special Mention | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		712
Special Mention | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		0
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 14,017	7,443
Substandard | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		1,290
Substandard | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		214
Substandard | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		5,554
Substandard | Commercial real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		0
Substandard | Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		385
Substandard | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans		$ 0

LOANS AND ALLOWANCE FOR CREDI_4

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Impaired Loans By Loan Portfolio Class) (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 1,131
Unpaid Principal Balance	1,131
Related Allowance	820
Recorded Investment	4,984
Unpaid Principal Balance	4,984
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment	781
Unpaid Principal Balance	781
Related Allowance	628
Recorded Investment	0
Unpaid Principal Balance	0
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	350
Unpaid Principal Balance	350
Related Allowance	192
Recorded Investment	4,984
Unpaid Principal Balance	$ 4,984

LOANS AND ALLOWANCE FOR CREDI_5

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Average Of Impaired Loans And Related Interest Income By Loan Portfolio Class) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 1,847
Average Recorded Investment	5,568
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	991
Average Recorded Investment	2
Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	856
Average Recorded Investment	$ 5,566

LOANS AND ALLOWANCE FOR CREDI_6

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Interest lost on nonaccrual loans	$ 302	$ 410
Aggregate amount of loans with related parties	5,307	$ 5,950
New loans or advances extended to related parties	344
Repayments on loans or advances to related parties	$ 987

LOANS AND ALLOWANCE FOR CREDI_7

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Nonaccrual Loans By Classes Of The Loan Portfolio) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
With a Related Allowance	$ 1,319
Without a Related Allowance	1,692
Total	3,011	$ 2,654
Commercial and industrial
Financing Receivable, Past Due [Line Items]
With a Related Allowance	1,004
Without a Related Allowance	0
Total	1,004	781
Commercial real estate
Financing Receivable, Past Due [Line Items]
With a Related Allowance	315
Without a Related Allowance	1,164
Total	1,479	1,873
Residential mortgage
Financing Receivable, Past Due [Line Items]
With a Related Allowance	0
Without a Related Allowance	343
Total	343	0
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
With a Related Allowance	0
Without a Related Allowance	185
Total	$ 185	$ 0

LOANS AND ALLOWANCE FOR CREDI_8

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Troubled Debt Restructurings) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Mortgage loans in process of foreclosure	$ 1,300	$ 1,100

LOANS AND ALLOWANCE FOR CREDI_9

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Summarized By The Past Due Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 3,011	$ 2,654
Greater than 90 days past due and still accruing	1,162	1,203
Total nonperforming loans	4,173	3,857
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,004	781
Greater than 90 days past due and still accruing	0	0
Commercial real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,479	1,873
Greater than 90 days past due and still accruing	0	0
Commercial real estate construction
Financing Receivable, Past Due [Line Items]
Greater than 90 days past due and still accruing	0	0
Residential mortgage
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	343	0
Greater than 90 days past due and still accruing	505	705
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	185	0
Greater than 90 days past due and still accruing	654	498
Consumer
Financing Receivable, Past Due [Line Items]
Greater than 90 days past due and still accruing	$ 3	$ 0

LOANS AND ALLOWANCE FOR CRED_10

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loan Modification (Details) - Commercial and industrial $ in Thousands	Dec. 31, 2023 USD ($)
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified	549
% of Total Class of Financing Receivable
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified	0.004

LOANS AND ALLOWANCE FOR CRED_11

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Allowance For Loan Losses And Recorded Investment In Financing Receivables) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 17,861	$ 19,033
Charge-offs	(506)	(1,286)
Recoveries	136	114
Ending balance	19,969	17,861
Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	860	0
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,618
Ending balance		1,618
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,848	3,176
Charge-offs	(110)	(238)
Recoveries	64	58
Ending balance	2,048	2,848
Commercial and industrial | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	8	(148)
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(762)
Ending balance		(762)
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	10,016	10,716
Charge-offs	0	(831)
Recoveries	0	0
Ending balance	12,010	10,016
Commercial real estate | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	888	131
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,106
Ending balance		1,106
Commercial real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,000	616
Charge-offs	0	0
Recoveries	0	0
Ending balance	2,070	1,000
Commercial real estate construction | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	(277)	384
Commercial real estate construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,347
Ending balance		1,347
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	3,029	3,235
Charge-offs	0	(3)
Recoveries	0	5
Ending balance	3,303	3,029
Residential mortgage | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	(23)	(208)
Residential mortgage | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	297
Ending balance		297
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	347	501
Charge-offs	0	(33)
Recoveries	0	22
Ending balance	397	347
Home equity lines of credit | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	33	(143)
Home equity lines of credit | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	17
Ending balance		17
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	376	408
Charge-offs	(396)	(181)
Recoveries	72	29
Ending balance	141	376
Consumer | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	231	120
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(142)
Ending balance		(142)
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	245	381
Charge-offs	0	0
Recoveries	0	0
Ending balance	0	245
Unallocated | Financing Receivable Excluding Unfunded Commitments
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for credit losses	0	(136)
Unallocated | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (245)
Ending balance		$ (245)

LOANS AND ALLOWANCE FOR CRED_12

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Performance Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 252,168
2022	300,562
2021	233,941
2020	113,922
2019	109,765
Prior	479,125
Revolving Loans Amortized Cost Basis	140,217
Gross loans	1,629,700	$ 1,542,264
2023	48
2022	83
2021	42
2020	55
2019	23
Prior	188
Revolving Loans Amortized Cost Basis	67
Total	506	1,286
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2023	207,689
2022	244,495
2021	210,808
2020	92,450
2019	90,270
Prior	334,815
Revolving Loans Amortized Cost Basis	52,423
Gross loans	1,232,950	1,492,913
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,643
2022	7,235
2021	6,803
2020	2,922
2019	9,188
Prior	19,885
Revolving Loans Amortized Cost Basis	4,797
Gross loans	53,473	41,908
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023	7
2022	135
2021	499
2020	1,621
2019	713
Prior	8,770
Revolving Loans Amortized Cost Basis	2,272
Gross loans	14,017	7,443
Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	41,829
2022	48,697
2021	15,831
2020	16,929
2019	9,594
Prior	114,715
Revolving Loans Amortized Cost Basis	80,160
Gross loans	327,755	1,538,407
Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	940
Revolving Loans Amortized Cost Basis	565
Gross loans	1,505	3,857
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	898,709	824,111
Total	0	831
Commercial real estate | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	138,085
2022	159,152
2021	136,914
2020	64,352
2019	74,782
Prior	309,794
Revolving Loans Amortized Cost Basis	15,630
Gross loans	898,709
Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		789,017
Commercial real estate | Pass | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	136,158
2022	152,767
2021	130,994
2020	60,918
2019	65,856
Prior	287,026
Revolving Loans Amortized Cost Basis	13,636
Gross loans	847,355
Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		29,540
Commercial real estate | Special Mention | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	1,927
2022	6,385
2021	5,920
2020	1,904
2019	8,222
Prior	16,244
Revolving Loans Amortized Cost Basis	1,994
Gross loans	42,596
Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		5,554
Commercial real estate | Substandard | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	1,530
2019	704
Prior	6,524
Revolving Loans Amortized Cost Basis	0
Gross loans	8,758
Commercial real estate | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		822,238
Commercial real estate | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		1,873
Residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	394,189	361,905
Total	0	3
Residential mortgage | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	39,734
2022	27,694
2021	41,624
2020	15,155
2019	11,318
Prior	29,949
Revolving Loans Amortized Cost Basis	464
Gross loans	165,938
Residential mortgage | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	33,884
2022	45,221
2021	14,878
2020	16,184
2019	9,059
Prior	108,869
Revolving Loans Amortized Cost Basis	156
Gross loans	228,251
Residential mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		355,888
Residential mortgage | Pass | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	39,146
2022	27,612
2021	41,031
2020	14,758
2019	10,492
Prior	27,274
Revolving Loans Amortized Cost Basis	402
Gross loans	160,715
Residential mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		5,803
Residential mortgage | Special Mention | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	588
2022	82
2021	593
2020	397
2019	826
Prior	2,457
Revolving Loans Amortized Cost Basis	62
Gross loans	5,005
Residential mortgage | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		214
Residential mortgage | Substandard | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	218
Revolving Loans Amortized Cost Basis	0
Gross loans	218
Residential mortgage | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		361,200
Residential mortgage | Performing Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	33,884
2022	45,221
2021	14,878
2020	16,184
2019	9,059
Prior	108,021
Revolving Loans Amortized Cost Basis	156
Gross loans	227,403
Residential mortgage | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		705
Residential mortgage | Nonperforming Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	848
Revolving Loans Amortized Cost Basis	0
Gross loans	848
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	152,344	180,958
Total	110	238
Commercial and industrial | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	12,454
2022	24,697
2021	35,619
2020	16,234
2019	14,071
Prior	19,836
Revolving Loans Amortized Cost Basis	29,433
Gross loans	152,344
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	110
Revolving Loans Amortized Cost Basis	0
Total	110
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		175,633
Commercial and industrial | Pass | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	12,319
2022	24,259
2021	34,830
2020	15,614
2019	13,922
Prior	17,780
Revolving Loans Amortized Cost Basis	25,147
Gross loans	143,871
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		4,035
Commercial and industrial | Special Mention | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	128
2022	303
2021	290
2020	529
2019	140
Prior	459
Revolving Loans Amortized Cost Basis	2,014
Gross loans	3,863
Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		1,290
Commercial and industrial | Substandard | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	7
2022	135
2021	499
2020	91
2019	9
Prior	1,597
Revolving Loans Amortized Cost Basis	2,272
Gross loans	4,610
Commercial and industrial | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		180,177
Commercial and industrial | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		781
Commercial real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	84,341	80,491
Total	0	0
Commercial real estate construction | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	19,766
2022	40,223
2021	3,953
2020	1,252
2019	0
Prior	3,398
Revolving Loans Amortized Cost Basis	8,003
Gross loans	76,595
Commercial real estate construction | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	5,571
2022	753
2021	175
2020	210
2019	170
Prior	867
Revolving Loans Amortized Cost Basis	0
Gross loans	7,746
Commercial real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		78,673
Commercial real estate construction | Pass | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	19,766
2022	39,758
2021	3,953
2020	1,160
2019	0
Prior	2,604
Revolving Loans Amortized Cost Basis	8,003
Gross loans	75,244
Commercial real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		1,818
Commercial real estate construction | Special Mention | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	465
2021	0
2020	92
2019	0
Prior	725
Revolving Loans Amortized Cost Basis	0
Gross loans	1,282
Commercial real estate construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		0
Commercial real estate construction | Substandard | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	69
Revolving Loans Amortized Cost Basis	0
Gross loans	69
Commercial real estate construction | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		80,491
Commercial real estate construction | Performing Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	5,571
2022	753
2021	175
2020	210
2019	170
Prior	867
Revolving Loans Amortized Cost Basis	0
Gross loans	7,746
Commercial real estate construction | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		0
Home equity lines of credit
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	90,163	83,463
Total	0	33
Home equity lines of credit | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	300
2022	99
2021	0
2020	0
2019	0
Prior	493
Revolving Loans Amortized Cost Basis	5,962
Gross loans	6,854
Home equity lines of credit | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	23
2022	38
2021	0
2020	13
2019	94
Prior	4,834
Revolving Loans Amortized Cost Basis	78,307
Gross loans	83,309
Home equity lines of credit | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		82,366
Home equity lines of credit | Pass | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	300
2022	99
2021	0
2020	0
2019	0
Prior	131
Revolving Loans Amortized Cost Basis	5,235
Gross loans	5,765
Home equity lines of credit | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		712
Home equity lines of credit | Special Mention | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	727
Gross loans	727
Home equity lines of credit | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		385
Home equity lines of credit | Substandard | Internally Risk Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	362
Revolving Loans Amortized Cost Basis	0
Gross loans	362
Home equity lines of credit | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		82,965
Home equity lines of credit | Performing Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	23
2022	38
2021	0
2020	13
2019	94
Prior	4,742
Revolving Loans Amortized Cost Basis	77,745
Gross loans	82,655
Home equity lines of credit | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		498
Home equity lines of credit | Nonperforming Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	92
Revolving Loans Amortized Cost Basis	562
Gross loans	654
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	9,954	11,336
Total	396	181
Consumer | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,351
2022	2,685
2021	778
2020	522
2019	271
Prior	1,085
Revolving Loans Amortized Cost Basis	2,262
Gross loans	9,954
2023	48
2022	83
2021	42
2020	55
2019	23
Prior	78
Revolving Loans Amortized Cost Basis	67
Total	396
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		11,336
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		0
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		0
Consumer | Performing Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		11,336
Consumer | Performing Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2,351
2022	2,685
2021	778
2020	522
2019	271
Prior	1,085
Revolving Loans Amortized Cost Basis	2,259
Gross loans	9,951
Consumer | Nonperforming Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans		$ 0
Consumer | Nonperforming Loans | Performance Rated
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	3
Gross loans	$ 3

LOANS AND ALLOWANCE FOR CRED_13

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans with Allowance and with No Allowance (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	$ 1,131
Unpaid Principal Balance	1,131
Related Allowance	820
Recorded Investment	4,984
Unpaid Principal Balance	4,984
Average Recorded Investment	1,847
Interest Income	0
Average Recorded Investment	5,568
Interest Income	589
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	781
Unpaid Principal Balance	781
Related Allowance	628
Recorded Investment	0
Unpaid Principal Balance	0
Average Recorded Investment	991
Interest Income	0
Average Recorded Investment	2
Interest Income	0
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Recorded Investment	350
Unpaid Principal Balance	350
Related Allowance	192
Recorded Investment	4,984
Unpaid Principal Balance	4,984
Average Recorded Investment	856
Interest Income	0
Average Recorded Investment	5,566
Interest Income	$ 589

LOANS AND ALLOWANCE FOR CRED_14

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Classes of Loans by Past Due Status (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Gross loans	$ 1,629,700	$ 1,542,264
Greater than 90 days past due and still accruing	1,162	1,203
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	1,927	5,899
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	735	1,517
Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	1,665	1,620
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	4,327	9,036
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	1,625,373	1,533,228
Commercial real estate
Financing Receivable, Past Due [Line Items]
Gross loans	898,709	824,111
Greater than 90 days past due and still accruing	0	0
Commercial real estate | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	150	2,026
Commercial real estate | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	347	350
Commercial real estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	0	255
Commercial real estate | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	497	2,631
Commercial real estate | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	898,212	821,480
Residential mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	394,189	361,905
Greater than 90 days past due and still accruing	505	705
Residential mortgage | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	1,293	2,969
Residential mortgage | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	388	970
Residential mortgage | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	849	705
Residential mortgage | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	2,530	4,644
Residential mortgage | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	391,659	357,261
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Gross loans	152,344	180,958
Greater than 90 days past due and still accruing	0	0
Commercial and industrial | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	50	287
Commercial and industrial | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	0	0
Commercial and industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	159	162
Commercial and industrial | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	209	449
Commercial and industrial | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	152,135	180,509
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Gross loans	90,163	83,463
Greater than 90 days past due and still accruing	654	498
Home equity lines of credit | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	414	438
Home equity lines of credit | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	0	117
Home equity lines of credit | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	654	498
Home equity lines of credit | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	1,068	1,053
Home equity lines of credit | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	89,095	82,410
Commercial real estate construction
Financing Receivable, Past Due [Line Items]
Gross loans	84,341	80,491
Greater than 90 days past due and still accruing	0	0
Commercial real estate construction | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	12	24
Commercial real estate construction | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	0	0
Commercial real estate construction | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	0	0
Commercial real estate construction | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	12	24
Commercial real estate construction | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	84,329	80,467
Consumer
Financing Receivable, Past Due [Line Items]
Gross loans	9,954	11,336
Greater than 90 days past due and still accruing	3	0
Consumer | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	8	155
Consumer | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	0	80
Consumer | Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	3	0
Consumer | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	11	235
Consumer | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Gross loans	$ 9,943	$ 11,101

LOANS AND ALLOWANCE FOR CRED_15

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Change in Fair Value (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Business Assets
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 1,004
Business Assets | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Business Assets | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Business Assets | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,004
Business Assets | Home equity lines of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	2,007
Real Estate | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	1,479
Real Estate | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	343
Real Estate | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	0
Real Estate | Home equity lines of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total	$ 185

PREMISES AND EQUIPMENT (Table)

PREMISES AND EQUIPMENT (Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 53,561	$ 52,539
Accumulated depreciation	(27,278)	(25,486)
Premises and equipment, net	26,283	27,053
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	5,418	5,418
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	33,249	32,515
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	14,813	14,598
Construction in process
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 81	$ 8

PREMISES AND EQUIPMENT (Narrati

PREMISES AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 1,900	$ 2,300

INVESTMENTS IN LOW-INCOME HOU_2

INVESTMENTS IN LOW-INCOME HOUSING PARTNERSHIPS (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) Partnership	Dec. 31, 2022 USD ($)
Real Estate Partnership Investment Subsidiaries, Net Income (Loss) before Tax [Abstract]
Number of limited partnerships in low-income properties | Partnership	2
Investments in low-income housing partnerships	$ 1,003	$ 1,129
Net gains on sales of low income housing partnership	$ 0	$ 421

LEASES (Supplemental Balance Sh

LEASES (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating Leases: Right of use asset	$ 2,615	$ 3,162
Operating Leases: Lease liabilities	$ 2,615	$ 3,162
Operating Leases: Weighted average remaining lease term	4 years 8 months 12 days	5 years
Operating Leases: Weighted average discount rate, Percent	5.61%	5.42%

LEASES (Future Minimum Rental P

LEASES (Future Minimum Rental Payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2024	$ 827
2025	785
2026	632
2027	428
2028	393
Thereafter	367
Total minimum lease payments	3,432
Amount representing interest	817
Present value of net minimum lease payments	$ 2,615	$ 3,162

LEASES (Narrative) (Details)

LEASES (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Rental expense	$ 924,000	$ 964,000

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS (Carrying Value And Accumulated Amortization Of The Intangible Assets) (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 28, 2022	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 44,185	$ 44,185
Gross Carrying Amount of Intangible Asset		22,309	22,129
Accumulated Amortization of Intangible Asset		13,227	11,797
Amortization of Intangible Assets		1,424	1,492
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Intangible Asset		$ 5,978	5,978
Intangible asset amortization life		10 years
Accumulated Amortization of Intangible Asset		$ 4,271	3,620
RIG | Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Intangible Asset		16,331	16,151
Accumulated Amortization of Intangible Asset		$ 8,956	$ 8,177
Hockley & O'Donnell Insurance Agency, LLC
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,100
Purchase price	7,800
Hockley & O'Donnell Insurance Agency, LLC | Covenant Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Intangible Asset	$ 5,700
Minimum | Customer Lists
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization life		8 years
Maximum | Customer Lists
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization life		15 years

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS (Expected Amortization Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Business Combinations [Abstract]
2024	$ 1,244
2025	1,115
2026	1,004
2027	857
2028	711
Thereafter	4,151
Total	9,082
Intangible assets amortization	$ 1,424	$ 1,492

DEPOSITS (Schedule Of Deposits)

DEPOSITS (Schedule Of Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Interest-Bearing Deposit Liabilities [Abstract]
Noninterest-bearing demand deposits	$ 500,332	$ 595,049
Interest-bearing demand deposits	524,289	592,586
Deposits, Money Market Deposits	264,907	310,911
Deposits, Savings Deposits	340,134	407,299
Total demand and savings	1,629,662	1,905,845
Time	232,151	293,130
Total Deposits	$ 1,861,813	$ 2,198,975

DEPOSITS (Schedule Of Maturitie

DEPOSITS (Schedule Of Maturities Of Time Certificates Of Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposit Liability [Line Items]
Time Deposits	$ 232,151	$ 293,130
Less Than $250,000
Deposit Liability [Line Items]
2024	145,891
2025	30,168
2026	6,643
2027	4,322
2028	1,726
Thereafter	16
Time Deposits	188,766
More Than $250,000
Deposit Liability [Line Items]
2024	39,351
2025	3,780
2026	254
2027	0
2028	0
Thereafter	0
Time Deposits	$ 43,385

BORROWINGS (Schedule of Short-t

BORROWINGS (Schedule of Short-term Debt) (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Amount	$ 56,882,000	$ 41,954,000
Rate	3.05%	0.12%
Federal Home Loan Bank Stock	$ 9,400,000
Line of Credit Facility, Current Borrowing Capacity	192,000,000
Securities Sold under Agreements to Repurchase
Short-term Debt [Line Items]
Amount	$ 26,882,000	$ 41,954,000
Rate	0.15%	0.12%
FHLB overnight advance
Short-term Debt [Line Items]
Amount	$ 30,000,000	$ 0
Rate	5.64%	0%

BORROWINGS (Schedule of Maturit

BORROWINGS (Schedule of Maturities of Long-term Debt) (Details) - USD ($)		12 Months Ended
	Mar. 30, 2021	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
FHLB fixed-rate advances maturing within one year of balance sheet date, Amount		$ 80,000,000	$ 0
FHLB fixed-rate advances maturing within one year of balance sheet date, Rate		4.71%	0%
Long-term debt		$ 195,292,000	$ 21,000,000
Maximum borrowings from FHLB		867,200,000
Available borrowings from FHLB		661,700,000
FHLB fixed-rate advances maturing from one to two years of balance sheet date, Amount		$ 60,000,000	$ 0
FHLB fixed-rate advances maturing from one to two years from balance sheet date, Rate		4.64%	0%
FHLB fixed-rate advances maturing from two to three years from balance sheet date, Amount		$ 35,000,000	$ 0
FHLB fixed-rate advances maturing from two to three years from balance sheet date, Rate		4.23%	0%
Long-term debt, Rate		4.62%	3.78%
Trust preferred subordinated debt
Debt Instrument [Line Items]
Long-term debt		$ 15,000,000	$ 15,000,000
Effective rate, percentage		4%	4%
Interest rate percentage	4%
Subordinated debt issued	$ 15,000,000
Debt Instrument, Issuance Price, Percentage	100%
Trust Preferred Subordinated Debt, FCBI | Trust preferred subordinated debt
Debt Instrument [Line Items]
Long-term debt		$ 5,292,000	$ 6,000,000
Effective rate, percentage		7.28%	3.21%
Subordinated debt issued		$ 6,000,000
Secured Overnight Financing Rate (SOFR) | Trust preferred subordinated debt
Debt Instrument [Line Items]
Basis spread on prime rate, percentage	3.29%
Secured Overnight Financing Rate (SOFR) | Trust Preferred Subordinated Debt, FCBI | Trust preferred subordinated debt
Debt Instrument [Line Items]
Interest rate percentage		7.28%
Basis spread on prime rate, percentage		1.63%

FAIR VALUE MEASUREMENTS (Fair V

FAIR VALUE MEASUREMENTS (Fair Value Measurements, Recurring and Nonrecurring) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Apr. 01, 2022	Dec. 31, 2021
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	$ 451,693	$ 553,554
Equity securities with readily determinable fair values	928	1,719
Investment securities available for sale, at estimated fair value	451,693	553,554	$ 39,700
Equity securities with readily determinable fair values	928	1,719		$ 2,609
Loans held for sale	280	123
Foreclosed assets held for resale	467	474
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Equity securities with readily determinable fair values	928	1,719
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	451,693	553,554
Equity securities with readily determinable fair values	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Equity securities with readily determinable fair values	0	0
U.S. Government and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	156,795	210,999
Mortgage-backed securities, residential
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	265,204	295,718
State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value		15,235
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	29,694	31,602
Recurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	451,693	553,554
Equity securities with readily determinable fair values	928	1,719
Loans held for sale	280	123
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Equity securities with readily determinable fair values	928	1,719
Loans held for sale	0	0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	451,693	553,554
Equity securities with readily determinable fair values	0	0
Loans held for sale	280	123
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Equity securities with readily determinable fair values	0	0
Loans held for sale	0	0
Recurring | U.S. Government and agencies | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	156,795	210,999
Recurring | U.S. Government and agencies | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Recurring | U.S. Government and agencies | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	156,795	210,999
Recurring | U.S. Government and agencies | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Recurring | Mortgage-backed securities, residential | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	265,204	295,718
Recurring | Mortgage-backed securities, residential | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Recurring | Mortgage-backed securities, residential | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	265,204	295,718
Recurring | Mortgage-backed securities, residential | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Recurring | State and municipal | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value		15,235
Recurring | State and municipal | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value		0
Recurring | State and municipal | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value		15,235
Recurring | State and municipal | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value		0
Recurring | Corporate bonds | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	29,694	31,602
Recurring | Corporate bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Recurring | Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	29,694	31,602
Recurring | Corporate bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	0	0
Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	467	474
Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	0	0
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	0	0
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	467	474
Collateral dependent impaired loan | Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	242	3,773
Collateral dependent impaired loan | Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Collateral dependent impaired loan | Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Collateral dependent impaired loan | Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 242	$ 3,773

FAIR VALUE MEASUREMENTS (Fair_2

FAIR VALUE MEASUREMENTS (Fair Value Inputs, Assets, Quantitative Information) (Details) - Nonrecurring - Fair Value Estimate - Collateral dependent impaired loan $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 242	$ 3,773
Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Measurement Input	(0.94)	(0.48)
Measurement Input, Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Measurement Input	(0.33)	(0.10)
Measurement Input, Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Measurement Input	(1)	(0.50)

FAIR VALUE MEASUREMENTS (Fair_3

FAIR VALUE MEASUREMENTS (Fair Value, by Balance Sheet Grouping) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Apr. 01, 2022	Dec. 31, 2021
Financial assets:
Interest-bearing deposits with banks	$ 44,516	$ 128,094
Equity securities with readily determinable fair values	928	1,719		$ 2,609
Investment securities available for sale	451,693	553,554	$ 39,700
Investment securities held to maturity	59,057	58,078
Restricted investment in bank stocks	9,677	1,629
Carrying Amount
Financial assets:
Cash and due from banks	21,442	40,067
Interest-bearing deposits with banks	44,516	128,094
Equity securities with readily determinable fair values	928	1,719
Investment securities available for sale	451,693	553,554
Investment securities held to maturity	64,600	64,977
Loans held for sale	280	123
Loans, net	1,608,019	1,520,749
Accrued interest receivable	8,080	6,915
Restricted investment in bank stocks	9,677	1,629
Financial liabilities:
Demand deposits, savings, and money markets	1,629,662	1,905,845
Time deposits	232,151	293,130
Securities sold under repurchase agreements	26,882	41,954
FHLB Advances	205,000
Trust preferred and subordinated debt	20,292	21,000
Accrued interest payable	794	51
Fair Value
Financial assets:
Cash and due from banks	21,442	40,067
Interest-bearing deposits with banks	44,516	128,094
Equity securities with readily determinable fair values	928	1,719
Investment securities available for sale	451,693	553,554
Investment securities held to maturity	59,057	58,078
Loans held for sale	280	123
Loans, net	1,562,703	1,458,556
Accrued interest receivable	8,080	6,915
Restricted investment in bank stocks		1,629
Financial liabilities:
Demand deposits, savings, and money markets	1,391,709	1,905,845
Time deposits	221,770	276,182
Securities sold under repurchase agreements	23,666	41,954
FHLB Advances	206,950
Trust preferred and subordinated debt	16,992	18,648
Accrued interest payable	794	51
Level 1
Financial assets:
Cash and due from banks	7,063	6,977
Interest-bearing deposits with banks	44,516	128,094
Equity securities with readily determinable fair values	928	1,719
Investment securities available for sale	0	0
Investment securities held to maturity	0	0
Loans held for sale	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Restricted investment in bank stocks	0	0
Financial liabilities:
Demand deposits, savings, and money markets	0	0
Time deposits	0	0
Securities sold under repurchase agreements	0	0
FHLB Advances	0
Trust preferred and subordinated debt	0	0
Accrued interest payable	0	0
Level 2
Financial assets:
Cash and due from banks	14,379	33,090
Interest-bearing deposits with banks	0	0
Equity securities with readily determinable fair values	0	0
Investment securities available for sale	451,693	553,554
Investment securities held to maturity	59,057	58,078
Loans held for sale	280	123
Loans, net	0	0
Accrued interest receivable	8,080	6,915
Restricted investment in bank stocks	9,677	1,629
Financial liabilities:
Demand deposits, savings, and money markets	1,391,709	1,905,845
Time deposits	221,770	276,182
Securities sold under repurchase agreements	23,666	41,954
FHLB Advances	206,950
Trust preferred and subordinated debt	16,992	18,648
Accrued interest payable	794	51
Level 3
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits with banks	0	0
Equity securities with readily determinable fair values	0	0
Investment securities available for sale	0	0
Investment securities held to maturity	0	0
Loans held for sale	0	0
Loans, net	1,562,703	1,458,556
Accrued interest receivable	0	0
Restricted investment in bank stocks	0	0
Financial liabilities:
Demand deposits, savings, and money markets	0	0
Time deposits	0	0
Securities sold under repurchase agreements	0	0
FHLB Advances	0
Trust preferred and subordinated debt	0	0
Accrued interest payable	$ 0	$ 0

RETIREMENT PLANS (Schedule of B

RETIREMENT PLANS (Schedule of Benefit Plan Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 30,226	$ 39,123
Service cost	495	777
Interest cost	1,493	1,052
Actuarial gain (loss)	983	(9,141)
Benefits paid	(1,703)	(1,585)
Projected benefit obligation at end of year	31,494	30,226
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	43,119	50,218
Actual return on plan assets	5,011	(5,514)
Benefits paid	(1,703)	(1,585)
Fair value of plan assets at end of year	46,427	43,119
Funded Status, included in other assets	14,933	12,893
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	$ 5,120	$ 6,887

RETIREMENT PLANS (Assumptions U

RETIREMENT PLANS (Assumptions Used To Determine The Benefit Obligation and Net Periodic Benefit) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Postemployment Benefits [Abstract]
Assumptions Used Calculating Benefit Obligation: Discount rate	4.90%	5.10%
Assumptions Used Calculating Benefit Obligation: Rate of compensation increase	3.50%	3.50%
Discount rate	5.10%	2.75%
Expected long-term rate of return on plan assets	6.75%	6.75%
Rate of compensation increase	3.50%	3.50%

RETIREMENT PLANS - Components o

RETIREMENT PLANS - Components of Net Periodic Cost (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Service cost	$ 495	$ 777
Interest cost	1,493	1,052
Expected return on plan assets	(2,653)	(3,136)
Recognized net actuarial loss	392	407
Net Periodic Benefit Income	(273)	(900)
Net gain	(1,375)	(491)
Amortization of net loss	(392)	(407)
Total recognized in other comprehensive income (loss)	(1,767)	(898)
Total recognized in net periodic benefit cost (income) and other comprehensive income	$ (2,040)	$ (1,798)
Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	Interest cost
Defined Benefit Plan Net Periodic Benefit Cost Credit Expected Return Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	Expected return on plan assets
Defined Benefit Plan, Net Periodic Benefit Cost, Credit, Immediate Recognition Of Actuarial Gain Loss Statement Of Income Or Comprehensive Income, Extensible List, Not Disclosed Flag	Recognized net actuarial loss
Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag	Amortization of net loss

RETIREMENT PLANS (Comparison of

RETIREMENT PLANS (Comparison of Obligations of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Projected benefit obligation	$ 31,494	$ 30,226	$ 39,123
Accumulated benefit obligation	30,411	29,150
Fair value of plan assets at measurement date	$ 46,427	$ 43,119	$ 50,218

RETIREMENT PLANS (Narrative) (D

RETIREMENT PLANS (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) person	Dec. 31, 2022 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of active, vested terminated, and retired persons in the Plan | person	336
Corporation common stock included in equity securities, percentage of total plan assets	8%	8%
Employee contribution percentage, maximum	100%
Additional compensation contributed to plan	50%
Percentage over employees' gross pay	2%
Balance accrued included in other liabilities	$ 4,500	$ 4,100
Annual expense included in salaries and benefits expense	$ 953	628
Banking Subsidiary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Match Percentage of Income	3%
Employer Contributions to and Expenses for the Plan	$ 999	901
Insurance Subsidiary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Contributions to and Expenses for the Plan	$ 183	157
Non-highly compensated employees | Insurance Subsidiary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Match Percentage of Income	6%
Highly compensated employees | Insurance Subsidiary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Match Percentage of Income	3%
Corporation common stock
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 3,900	$ 3,300

RETIREMENT PLANS (Future Benefi

RETIREMENT PLANS (Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Postemployment Benefits [Abstract]
2024	$ 2,010
2025	2,060
2026	2,070
2027	2,060
2028	2,060
2029-2033	$ 10,750

RETIREMENT PLANS (Pension Plan

RETIREMENT PLANS (Pension Plan Weighted-Average Assets' Allocations) (Details)	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	100%	100%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	43%	46%
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	54%	49%
Real estate
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocation	3%	5%

RETIREMENT PLANS (Fair Value Me

RETIREMENT PLANS (Fair Value Measurements) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	$ 46,427	$ 43,119	$ 50,218
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	20,123	19,749
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	24,891	21,228
Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	1,413	2,142
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	3,876	3,339
Level 1 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	3,876	3,339
Level 1 | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	0	0
Level 1 | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	0	0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	42,551	39,780
Level 2 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	16,247	16,410
Level 2 | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	24,891	21,228
Level 2 | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	1,413	2,142
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	0	0
Level 3 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	0	0
Level 3 | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	0	0
Level 3 | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at measurement date	$ 0	$ 0

INCOME TAXES (Schedule of Compo

INCOME TAXES (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 7,924	$ 7,461
State	(534)	1,259
Total	7,390	8,720
Deferred:
Federal	755	592
Deferred	16	(113)
Deferred Federal, State and Local, Tax Expense (Benefit)	771	479
Income Tax Expense, Total	$ 8,161	$ 9,199

INCOME TAXES (Schedule of Recon

INCOME TAXES (Schedule of Reconciliations of the Statutory Federal Income Tax) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Federal income tax at statutory rate	21%	21%
State income taxes, net of federal benefit	1.50%	1.80%
Tax-exempt income	(1.30%)	(1.10%)
Earnings on investment in bank-owned life insurance	(1.00%)	(0.70%)
Tax credit benefits	0%	(0.60%)
Other	0.30%	0.10%
Effective Income Tax Rate, Total	20.50%	20.50%

INCOME TAXES (Narrative) (Detai

INCOME TAXES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Rehabilitation and Low-Income Housing Income Tax Credits	$ 14	$ 281

INCOME TAXES (Components of Def

INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Deferred tax assets:
Investment securities available for sale	$ 12,052		$ 15,210
Allowance for credit losses	4,533		4,128
Accrued deferred compensation	1,166		1,064
Pension	1,162		1,608
Deferred director fees	1,097		978
Lease liability	742		731
Nonaccrual interest	740		792
Other	783		719
Allowance for unfunded commitments	390		0
Accumulated depreciation	3		0
Purchase accounting	0		149
Deferred tax assets: Total	22,668		25,379
Deferred tax liabilities:
Prepaid benefit cost	4,552		4,571
Goodwill and intangibles, net	1,439		1,462
Right of use asset	742		731
Prepaid expenses	67		179
Deferred loan fees	57		66
Accumulated depreciation	0		208
Purchase accounting	25		0
Deferred tax liabilities: Total	6,882		7,217
Net deferred tax asset	$ 15,786	$ 17,718	$ 18,162

REGULATORY MATTERS (The Actual

REGULATORY MATTERS (The Actual and Required Capital Amounts and Ratios) (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Undistributed earnings of the Bank available for distribution as dividends without prior regulatory approval	$ 48,300
Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual, Tier 1 leverage ratio (to average assets), Amount	$ 280,135	$ 258,468
Actual, Tier 1 leverage ratio (to average assets), Ratio	0.1157	0.0991
For Capital Adequacy Purposes, Tier 1 leverage ratio (to average assets), Amount (greater than or equal to)	$ 96,822	$ 104,372
For Capital Adequacy Purposes, Tier 1 leverage ratio (to average assets), Ratio (greater than or equal to)	0.040	0.040
Actual, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Amount	$ 274,844	$ 252,468
Actual, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio	0.1516	0.1500
For Capital Adequacy Purposes, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 81,562	$ 75,733
For Capital Adequacy Purposes, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	4.50%	4.50%
Actual, Tier 1 risk-based capital ratio (to risk-weighted assets), Amount	$ 280,135	$ 258,468
Actual, Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio	0.1546	0.1536
For Capital Adequacy Purposes, Tier 1 risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 108,749	$ 100,978
For Capital Adequacy Purposes, Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	0.060	0.060
Actual, Total risk-based capital ratio (to risk-weighted assets), Amount	$ 315,564	$ 291,421
Actual, Total risk-based capital ratio (to risk-weighted assets), Ratio	0.1741	0.1732
For Capital Adequacy Purposes, Total risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 144,999	$ 134,637
For Capital Adequacy Purposes, Total risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	0.080	0.080
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual, Tier 1 leverage ratio (to average assets), Amount	$ 268,314	$ 246,184
Actual, Tier 1 leverage ratio (to average assets), Ratio	0.1112	0.0950
For Capital Adequacy Purposes, Tier 1 leverage ratio (to average assets), Amount (greater than or equal to)	$ 96,494	$ 103,690
For Capital Adequacy Purposes, Tier 1 leverage ratio (to average assets), Ratio (greater than or equal to)	0.040	0.040
To be Well Capitalized under Prompt Corrective Action Provisions, Tier 1 leverage ratio (to average assets), Amount (greater than or equal to)	$ 120,618	$ 129,612
To be Well Capitalized under Prompt Corrective Action Provisions, Tier 1 leverage ratio (to average assets), Ratio (greater than or equal to)	0.050	0.050
Actual, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Amount	$ 268,314	$ 246,184
Actual, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio	0.1486	0.1468
For Capital Adequacy Purposes, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 81,260	$ 75,441
For Capital Adequacy Purposes, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	4.50%	4.50%
To be Well Capitalized under Prompt Corrective Action Provisions, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 117,375	$ 108,971
To be Well Capitalized under Prompt Corrective Action Provisions, Common Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	6.50%	6.50%
Actual, Tier 1 risk-based capital ratio (to risk-weighted assets), Amount	$ 268,314	$ 246,184
Actual, Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio	0.1486	0.1468
For Capital Adequacy Purposes, Tier 1 risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 108,346	$ 100,588
For Capital Adequacy Purposes, Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	0.060	0.060
To be Well Capitalized under Prompt Corrective Action Provisions, Tier 1 risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 144,462	$ 134,118
To be Well Capitalized under Prompt Corrective Action Provisions, Tier 1 risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	0.080	0.080
Actual, Total risk-based capital ratio (to risk-weighted assets), Amount	$ 288,742	$ 264,137
Actual, Total risk-based capital ratio (to risk-weighted assets), Ratio	0.1599	0.1576
For Capital Adequacy Purposes, Total risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 144,462	$ 134,118
For Capital Adequacy Purposes, Total risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	0.080	0.080
To be Well Capitalized under Prompt Corrective Action Provisions, Total risk-based capital ratio (to risk-weighted assets), Amount (greater than or equal to)	$ 180,577	$ 167,647
To be Well Capitalized under Prompt Corrective Action Provisions, Total risk-based capital ratio (to risk-weighted assets), Ratio (greater than or equal to)	0.100	0.100

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan to value ratio requirement (no greater than)	80%
Line of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commercial line of credit borrowing capacity	$ 1,500
Unsecured Debt | Line of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commercial line of credit borrowing capacity	5,000
Commitments to Extend Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, off-Balance-Sheet Risks, Face Amount, Liability	403,300	$ 401,786
Standby Letters of Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, off-Balance-Sheet Risks, Face Amount, Liability	$ 21,029	$ 11,429

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Weighted average shares outstanding, basic (in shares)	8,507,803	8,623,012
Unvested shares (in shares)	28,322	0
Weighted average shares outstanding, diluted (in shares)	8,536,125	8,623,012
Basic (in USD per share)	$ 3.72	$ 4.15
Diluted (in USD per share)	$ 3.71	$ 4.15

STOCKHOLDERS' EQUITY (Details)

STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Loss [Line Items]
Beginning Balance	$ 245,042	$ 272,114
Unrealized gains (losses) arising during the period, net of income tax expense (benefit) of $1,814 and $(14,499), respectively	6,814	(46,441)
Reclassification adjustment for net AFS investment securities losses included in net income, net of income tax benefit of $1,188 and $55, respectively	4,052	193
Amortization of unrealized losses on AFS investment securities transferred to HTM, net of income taxes of $203 and $211, respectively	916	739
Amortization of pension net loss, transition liability, and prior service cost, net of income taxes of $76 and $90, respectively	258	317
Unrecognized net gain, net of income taxes of $312 and $15, respectively	1,063	476
Other comprehensive income (loss), net of taxes	13,103	(48,467)
Ending Balance	277,461	245,042
Unrealized (Losses) Gains on Securities
Accumulated Other Comprehensive Loss [Line Items]
Beginning Balance	(52,734)	(3,474)
Unrealized gains (losses) arising during the period, net of income tax expense (benefit) of $1,814 and $(14,499), respectively	6,814	(50,192)
Reclassification adjustment for net AFS investment securities losses included in net income, net of income tax benefit of $1,188 and $55, respectively	4,052	193
Amortization of unrealized losses on AFS investment securities transferred to HTM, net of income taxes of $203 and $211, respectively	916	739
Amortization of pension net loss, transition liability, and prior service cost, net of income taxes of $76 and $90, respectively	0	0
Unrecognized net gain, net of income taxes of $312 and $15, respectively	0	0
Other comprehensive income (loss), net of taxes	11,782	(49,260)
Ending Balance	(40,952)	(52,734)
Pension Liability
Accumulated Other Comprehensive Loss [Line Items]
Beginning Balance	(5,278)	(6,071)
Unrealized gains (losses) arising during the period, net of income tax expense (benefit) of $1,814 and $(14,499), respectively	0	0
Reclassification adjustment for net AFS investment securities losses included in net income, net of income tax benefit of $1,188 and $55, respectively	0	0
Amortization of unrealized losses on AFS investment securities transferred to HTM, net of income taxes of $203 and $211, respectively	0	0
Amortization of pension net loss, transition liability, and prior service cost, net of income taxes of $76 and $90, respectively	258	317
Unrecognized net gain, net of income taxes of $312 and $15, respectively	1,063	476
Other comprehensive income (loss), net of taxes	1,321	793
Ending Balance	(3,957)	(5,278)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss [Line Items]
Beginning Balance	(58,012)	(9,545)
Unrealized gains (losses) arising during the period, net of income tax expense (benefit) of $1,814 and $(14,499), respectively	6,814	(50,192)
Reclassification adjustment for net AFS investment securities losses included in net income, net of income tax benefit of $1,188 and $55, respectively	4,052	193
Amortization of unrealized losses on AFS investment securities transferred to HTM, net of income taxes of $203 and $211, respectively	916	739
Amortization of pension net loss, transition liability, and prior service cost, net of income taxes of $76 and $90, respectively	258	317
Unrecognized net gain, net of income taxes of $312 and $15, respectively	1,063	476
Other comprehensive income (loss), net of taxes	13,103	(48,467)
Ending Balance	$ (44,909)	$ (58,012)

STOCKHOLDERS' EQUITY - Narrativ

STOCKHOLDERS' EQUITY - Narrative (Details) $ in Thousands		12 Months Ended
	Feb. 24, 2019	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Oct. 18, 2022 shares	Mar. 08, 2019 shares	Mar. 20, 2018 shares
Stockholders' Equity [Line Items]
Treasury stock acquired (in shares)			206,929
Dividend Reinvestment Plan
Stockholders' Equity [Line Items]
Shares issued from the dividend reinvestment plan (in shares)		20,361	20,908
Proceeds from the dividend reinvestment plan | $		$ 721	$ 713
ACNB Corporation 2018 Omnibus Stock Incentive Plan | Restricted Stock
Stockholders' Equity [Line Items]
Awards authorized (in shares)						400,000
Shares issued under plan since inception (in shares)		99,381
Non-vested number of shares (in shares)		32,993
Compensation expense | $		$ 1,000	$ 729
ACNB Corporation 2009 Restricted Stock Plan
Stockholders' Equity [Line Items]
2009 Restricted Stock plan, expiration period	10 years
2009 Restricted Stock Plan, number of shares authorized, but not issued (in shares)					174,055
Stock Repurchase Plan
Stockholders' Equity [Line Items]
Authorized (in shares)				255,575
Percentage of shares authorized				0.03
Treasury stock acquired (in shares)		61,066

ACNB CORPORATION (PARENT COMP_3

ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Statements of Condition) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Cash	$ 21,442	$ 40,067
Securities and other assets	54,186	46,874
Total Assets	2,418,847	2,525,507
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	195,292	21,000
Other liabilities	23,065	15,282
Total Liabilities and Stockholders’ Equity	2,418,847	2,525,507
Corporation
ASSETS
Cash	16,647	18,263
Securities and other assets	1,107	1,797
Receivable from banking subsidiary	1,355	1,508
Total Assets	297,880	266,131
LIABILITIES AND STOCKHOLDERS’ EQUITY
Long-term debt	20,292	21,000
Other liabilities	127	89
Stockholders’ equity	277,461	245,042
Total Liabilities and Stockholders’ Equity	297,880	266,131
Banking Subsidiary | Corporation
ASSETS
Investment	258,748	225,806
Other Subsidiaries | Corporation
ASSETS
Investment	$ 20,023	$ 18,757

ACNB CORPORATION (PARENT COMP_4

ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Statements of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items]
Gain on sale of securities	$ (5,240)	$ (234)
Other income	18,445	21,807
Income tax benefit	(8,161)	(9,199)
Net Income	31,688	35,752
Corporation
Condensed Financial Statements, Captions [Line Items]
Dividends from banking subsidiary	9,702	9,117
Gain on sale of securities	(7)	13
Other income	41	519
Total Revenues	9,736	9,649
Expenses	1,934	1,653
Net income before taxes and equity in undistributed earnings of subsidiaries	7,802	7,996
Income tax benefit	413	516
Net income before equity in undistributed earnings of subsidiaries	8,215	8,512
Equity in undistributed earnings of subsidiaries	23,473	27,240
Net Income	31,688	35,752
Comprehensive (Loss) Income	$ 44,791	$ (12,715)

ACNB CORPORATION (PARENT COMP_5

ACNB CORPORATION (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 31,688	$ 35,752
Gain on sale of low-income housing partnership	0	(421)
Net Cash Provided by Operating Activities	40,602	39,201
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sale of low-income housing partnerships	0	421
Proceeds from sales of equity securities	592	811
Net Cash (Used in) Provided by Investing Activities	15,437	(331,723)
CASH FLOWS USED IN FINANCING ACTIVITIES
Proceeds from long-term borrowings	175,000	1,500
Repayments on long-term borrowings	0	(15,200)
Common stock repurchased	(2,027)	(6,682)
Common stock issued	721	713
Dividends paid	(9,702)	(9,117)
Net Cash Used In Financing Activities	(158,242)	(249,448)
Net Decrease in Cash and Cash Equivalents	(102,203)	(541,970)
CASH AND CASH EQUIVALENTS — BEGINNING	168,161	710,131
CASH AND CASH EQUIVALENTS — ENDING	65,958	168,161
Corporation
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	31,688	35,752
Equity in undistributed earnings of subsidiaries	(23,473)	(27,240)
(Increase) decrease in receivable from banking subsidiary	153	(311)
Gain on sale of equity securities	(7)	(13)
Net gains (losses) on equity securities	0	177
Gain on sale of low-income housing partnership	0	(421)
Other	439	(308)
Net Cash Provided by Operating Activities	8,800	7,636
CASH FLOWS FROM INVESTING ACTIVITIES
Return on investment from subsidiary	0	13,000
Proceeds from sale of low-income housing partnerships	0	421
Proceeds from sales of equity securities	592	811
Net Cash (Used in) Provided by Investing Activities	592	14,232
CASH FLOWS USED IN FINANCING ACTIVITIES
Repayments on long-term borrowings	0	(2,700)
Common stock repurchased	(2,027)	(6,681)
Common stock issued	721	1,442
Dividends paid	(9,702)	(9,117)
Net Cash Used In Financing Activities	(11,008)	(17,056)
Net Decrease in Cash and Cash Equivalents	(1,616)	4,812
CASH AND CASH EQUIVALENTS — BEGINNING	18,263	13,451
CASH AND CASH EQUIVALENTS — ENDING	$ 16,647	$ 18,263

SEGMENT AND RELATED INFORMATI_3

SEGMENT AND RELATED INFORMATION (Segment Information) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments	2
Interest income and other income from external customers	$ 115,085	$ 108,856
Interest expense	8,320	3,624
Depreciation and amortization	3,362	3,796
Income before income taxes	39,849	44,951
Total assets	2,418,847	2,525,507
Goodwill	44,185	44,185
Capital expenditures	1,168	1,811
Banking
Segment Reporting Information [Line Items]
Interest income and other income from external customers	105,766	101,240
Interest expense	8,320	3,591
Depreciation and amortization	2,515	2,995
Income before income taxes	38,148	43,639
Total assets	2,399,151	2,505,353
Goodwill	35,800	35,800
Capital expenditures	424	1,783
Insurance
Segment Reporting Information [Line Items]
Interest income and other income from external customers	9,319	7,616
Interest expense	0	33
Depreciation and amortization	847	801
Income before income taxes	1,701	1,312
Total assets	19,696	20,154
Goodwill	8,385	8,385
Capital expenditures	$ 744	$ 28