ACNB (ACNB) 10-Q 9 May 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	May 01, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
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	false
Entity Emerging Growth Company	false
Document Shell Company Report	false
Entity Common Stock, Shares Outstanding		8,539,575
Entity Central Index Key	0000715579
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 17,395	$ 21,442
Interest-bearing deposits with banks	35,740	44,516
Total Cash and Cash Equivalents	53,135	65,958
Equity securities with readily determinable fair values	918	928
Investment securities available for sale, at estimated fair value	425,114	451,693
Investment securities held to maturity, at amortized cost (fair value $58,084, $59,057)	64,594	64,600
Loans held for sale	88	280
Total loans, net of unearned income	1,664,980	1,627,988
Allowance for credit losses	(20,172)	(19,969)
Loans, net	1,644,808	1,608,019
Premises and equipment, net	25,916	26,283
Right of use asset	2,447	2,615
Restricted investment in bank stocks	10,877	9,677
Investment in bank-owned life insurance	80,348	79,871
Investments in low-income housing partnerships	971	1,003
Goodwill	44,185	44,185
Intangible assets, net	8,761	9,082
Foreclosed assets held for resale	467	467
Other assets	51,659	54,186
Total assets	2,414,288	2,418,847
Deposits:
Noninterest-bearing	499,583	500,332
Interest-bearing	1,335,641	1,361,481
Total deposits	1,835,224	1,861,813
Short-term borrowings	17,303	56,882
Long-term borrowings	255,302	195,292
Lease liability	2,447	2,615
Allowance for unfunded commitments	1,569	1,719
Other liabilities	22,523	23,065
Total Liabilities	2,134,368	2,141,386
Stockholders’ Equity:
Preferred stock, $2.50 par value; 20,000,000 shares authorized; no shares outstanding at March 31, 2024 and December 31, 2023, respectively	0	0
Common stock, $2.50 par value; 20,000,000 shares authorized; 8,928,441 and 8,896,119 shares issued; 8,539,575 and 8,511,453 shares outstanding at March 31, 2024 and December 31, 2023, respectively	22,315	22,231
Treasury stock, at cost; 388,866 and 384,666 shares at March 31, 2024 and December 31, 2023, respectively	(11,101)	(10,954)
Additional paid-in capital	97,818	97,602
Retained earnings	217,712	213,491
Accumulated other comprehensive loss	(46,824)	(44,909)
Total Stockholders’ Equity	279,920	277,461
Total Liabilities and Stockholders’ Equity	$ 2,414,288	$ 2,418,847

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF CONDITION (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 58,084	$ 59,057
Preferred stock, par value (in dollars per share)	$ 2.50	$ 2.50
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	8,928,441	8,896,119
Common stock, shares outstanding (in shares)	8,539,575	8,511,453
Treasury stock, shares (in shares)	388,866	384,666

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Loans, including fees
Taxable	$ 21,470	$ 18,898
Tax-exempt	319	356
Securities:
Taxable	2,911	3,286
Tax-exempt	284	314
Dividends	240	41
Other	750	1,014
Total Interest and Dividend Income	25,974	23,909
INTEREST EXPENSE
Deposits	2,160	473
Short-term borrowings	339	17
Long-term borrowings	2,882	327
Total Interest Expense	5,381	817
Net Interest Income	20,593	23,092
Net Interest Income after Provisions for Credit Losses and Unfunded Commitments	20,521	22,719
NONINTEREST INCOME
Insurance commissions	2,115	1,902
Earnings on investment in bank-owned life insurance	477	442
Net gains (losses) on sales or calls of investment securities	69	(193)
Net (losses) gains on equity securities	(10)	20
Other	196	171
Total Noninterest Income	5,667	4,984
NONINTEREST EXPENSES
Salaries and employee benefits	11,168	10,442
Equipment	1,729	1,607
Net occupancy	1,130	1,037
Professional services	616	382
FDIC and regulatory	375	249
Other tax	370	337
Intangible assets amortization	321	360
Supplies and postage	191	206
Marketing and corporate relations	88	154
Other	1,674	1,508
Total Noninterest Expenses	17,662	16,282
Income before Income Taxes	8,526	11,421
Provision for income taxes	1,758	2,398
Net Income	$ 6,768	$ 9,023
PER SHARE DATA
Basic earnings (in dollars per share)	$ 0.80	$ 1.06
Diluted earnings (in dollars per share)	$ 0.80	$ 1.06
Financing Receivable Excluding Unfunded Commitments
INTEREST EXPENSE
Provision for credit losses	$ 223	$ 97
Unfunded Loan Commitment
INTEREST EXPENSE
Provision for credit losses	(151)	276
Service charges on deposits
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	991	962
Wealth management
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	962	840
ATM debit card charges
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	819	823
Gain from mortgage loans held for sale
NONINTEREST INCOME
Revenue from contract with customer, excluding assessed tax	$ 48	$ 17

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 6,768	$ 9,023
INVESTMENT SECURITIES
Unrealized (losses) gains arising during the period, net of income tax (benefit) expense of $(644) and $558, respectively	(2,198)	5,136
Reclassification adjustment for net AFS investment securities gains (losses) included in net income, net of income tax expense (benefit) of $16 and $(45), respectively	53	(146)
Total unrealized (loss) gain on AFS investment securities	(2,145)	4,990
Amortization of unrealized losses on AFS investment securities transferred to HTM, net of income taxes of $63 and $223, respectively	215	1,014
PENSION
Amortization of pension net loss, transition liability, and prior service cost, net of income taxes of $4 and $50, respectively	15	48
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME	(1,915)	6,052
TOTAL COMPREHENSIVE INCOME	$ 4,853	$ 15,075

CONSOLIDATED STATEMENTS OF CO_3

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
SECURITIES: Unrealized (losses) gains arising during the period, income taxes	$ (644)	$ 558
SECURITIES: Reclassification adjustment for gains (losses) included in net income, income taxes	16	(45)
SECURITIES: Amortization of unrealized losses on securities transferred to held to maturity, income taxes	63	223
PENSION: Amortization of pension net loss, transition liability, and prior service cost, income taxes	$ 4	$ 50

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2022	$ 245,042	$ 22,086	$ (8,927)	$ 96,022	$ 193,873	$ (58,012)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect for adoption of Topic 326, net of tax	(2,368)				(2,368)
Net income	9,023				9,023
Other comprehensive income (loss), net of taxes	6,052					6,052
Common stock shares issued	188	15		173
Repurchased shares	(29)		(29)
Restricted stock grants, net of forfeitures and withheld for taxes	0	97		(97)
Compensation expense for restricted shares	317			317
Cash dividends	(2,384)				(2,384)
Ending balance at Mar. 31, 2023	255,841	22,198	(8,956)	96,415	198,144	(51,960)
Beginning balance at Dec. 31, 2023	277,461	22,231	(10,954)	97,602	213,491	(44,909)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,768				6,768
Other comprehensive income (loss), net of taxes	(1,915)					(1,915)
Common stock shares issued	174	13		161
Repurchased shares	(147)		(147)
Restricted stock grants, net of forfeitures and withheld for taxes	(408)	71		(479)
Compensation expense for restricted shares	534			534
Cash dividends	(2,547)				(2,547)
Ending balance at Mar. 31, 2024	$ 279,920	$ 22,315	$ (11,101)	$ 97,818	$ 217,712	$ (46,824)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restricted stock grants, net of forfeitures and withheld for taxes (in shares)	27,424	43,074
Cash dividends declared (in dollars per share)	$ 0.30	$ 0.28
Dividend Reinvestment Plan
Common stock shares issued (in shares)	4,898	5,889
Stock Repurchase Plan
Common stock shares repurchased (in shares)	4,200	850

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 6,768	$ 9,023
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sales of loans originated for sale	(48)	(17)
Earnings on investment in bank-owned life insurance	(477)	(442)
(Gain) loss on sales or calls of securities	(69)	193
Loss (gain) on equity securities	10	(20)	$ (18)
Restricted stock compensation expense	534	317
Depreciation and amortization	766	883
Provision for credit losses and provision for unfunded commitments	72	373
Net amortization of investment securities premiums	414	446
(Increase) decrease in interest receivable	(60)	18
Increase in interest payable	682	72
Mortgage loans originated for sale	(1,820)	(8,375)
Proceeds from sales of loans originated for sale	2,060	8,348
Decrease in other assets	3,589	606
Increase in deferred tax asset	(222)	(972)
(Decrease) increase in other liabilities	(1,381)	4,466
Net Cash Provided by Operating Activities	10,818	14,919
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from calls/maturities of investment securities held to maturity	184	205
Proceeds from calls/maturities of investment securities available for sale	9,225	10,912
Proceeds from sales of investment securities available for sale	14,336	46,612
Proceeds from sale of equity securities	0	369
Redemption of equity securities	0	40
Purchase of restricted investment in bank stocks	(1,200)	(923)
Net (increase) decrease in loans	(37,012)	5,867
Capital expenditures	(78)	(58)
Net Cash Provided by (Used in) Investing Activities	(14,545)	63,024
CASH FLOWS FROM FINANCING ACTIVITIES
Net decrease in noninterest-bearing deposits	(749)	(694)
Net decrease in interest-bearing deposits	(25,840)	(142,459)
Net decrease in short-term borrowings	(39,579)	(11,660)
Proceeds from long-term borrowings	60,000	25,000
Dividends paid	(2,547)	(2,384)
Common stock repurchased	(147)	(29)
Common stock issued, net of restricted stock forfeitures and withheld for taxes	(234)	188
Net Cash Used In Financing Activities	(9,096)	(132,038)
Net Decrease in Cash and Cash Equivalents	(12,823)	(54,095)
CASH AND CASH EQUIVALENTS — BEGINNING	65,958	168,161	168,161
CASH AND CASH EQUIVALENTS — ENDING	53,135	114,066	$ 65,958
Supplemental disclosures of cash flow information:
Cash paid for interest	5,321	745
Cash paid for income taxes	$ 0	$ 0

Basis of Presentation and Natur

Basis of Presentation and Nature of Operations	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Nature of Operations	Basis of Presentation and 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. 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 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. The accompanying unaudited Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities as of the date of the financial statements as well as revenues and expenses during the period. Actual results could differ from those estimates. In the opinion of management, the accompanying unaudited Consolidated Financial Statements contain all adjustments necessary for a fair presentation. All such adjustments are of a normal recurring nature. These Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2023. The Corporation evaluates subsequent events through the filing date of this From 10-Q with the SEC. The results of operations for the three month period ended March 31, 2024, are not necessarily indicative of the results to be expected for the full year. Certain reclassifications have been made to the prior period financial statements to conform to the current period presentation. Reclassifications had no material effect on prior year net income or stockholders’ equity. Significant Accounting Policies The significant accounting policies used in preparation of the Consolidated Financial Statements are disclosed in the Corporation’s 2023 Annual Report on Form 10-K. Those significant accounting policies are unchanged at March 31, 2024. Recently Issued Accounting Standards 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 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. 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 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. 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.

Earnings Per Share and Restrict

Earnings Per Share and Restricted Stock	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Earnings Per Share and Restricted Stock	Earnings Per Share and Restricted Stock The Corporation has a simple capital structure. Basic earnings per share of common stock is calculated as net income available to common shareholders 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 shareholders divided by the weighted average number of shares outstanding. Three Months Ended March 31, 2024 2023 Weighted average shares outstanding (basic) 8,493,104 8,511,244 Dilutive effect of unvested shares 18,544 11,732 Weighted average shares outstanding (diluted) 8,511,648 8,522,976 Per share: Basic $ 0.80 $ 1.06 Diluted 0.80 1.06 There were no antidilutive instruments at March 31, 2024 and 2023. Stock Incentive Plan On May 1, 2018, shareholders 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 March 31, 2024, 138,019 shares were issued under this plan, of which 38,438 were unvested. Plan expense is recognized over the vesting period of the stock issued and resulted in $534 thousand and $495 thousand of compensation expense during the three months ended March 31, 2024 and 2023, respectively. Share Repurchase Plan

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Fair value of equity securities with readily determinable fair values at March 31, 2024 and December 31, 2023, are as follows: (In thousands) Fair Value at Beginning of Period Sales/reclassification (Losses) Gains Losses on sales of securities Fair Value at End of Period Three Months Ended March 31, 2024 CRA Mutual Fund $ 928 $ — $ (10) $ — $ 918 Twelve Months Ended December 31, 2023 CRA Mutual Fund $ 915 $ — $ 13 $ — $ 928 Canapi Ventures SBIC Fund 206 206 — — — Stock in other banks 598 592 5 (11) — $ 1,719 $ 798 $ 18 $ (11) $ 928 Amortized cost and fair value of securities were as follows: (In thousands) Amortized Gross Gross Fair March 31, 2024 Available for Sale U.S. Government and agencies $ 176,049 $ — $ 20,228 $ 155,821 Collateralized mortgage obligations 43,892 — 4,386 39,506 Residential mortgage-backed securities 173,920 — 21,340 152,580 Commercial mortgage-backed securities 66,136 3 4,485 61,654 Corporate bonds 18,109 — 2,556 15,553 $ 478,106 $ 3 $ 52,995 $ 425,114 Held to Maturity State and municipal $ 62,310 $ — $ 6,387 $ 55,923 Residential mortgage-backed securities 2,284 — 123 2,161 $ 64,594 $ — $ 6,510 $ 58,084 December 31, 2023 Available for Sale U.S. Government and agencies $ 176,458 $ — $ 19,663 $ 156,795 Collateralized mortgage obligations 45,189 — 4,105 41,084 Residential mortgage-backed securities 178,441 19 19,630 158,830 Commercial mortgage-backed securities 69,498 344 4,552 65,290 Corporate bonds 32,326 202 2,834 29,694 $ 501,912 $ 565 $ 50,784 $ 451,693 Held to Maturity State and municipal $ 62,133 $ — $ 5,419 $ 56,714 Residential mortgage-backed securities 2,467 — 124 2,343 $ 64,600 $ — $ 5,543 $ 59,057 The following table shows the Corporation’s investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2024, and December 31, 2023: Less than 12 Months 12 Months or More Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized March 31, 2024 Available for Sale U.S. Government and agencies $ — $ — $ 155,821 $ 20,228 $ 155,821 $ 20,228 Collateralized mortgage obligations — — 39,506 4,386 39,506 4,386 Residential mortgage-backed securities 2,737 6 149,843 21,334 152,580 21,340 Commercial mortgage-backed securities 26,850 92 29,847 4,393 56,697 4,485 Corporate bonds — — 15,553 2,556 15,553 2,556 $ 29,587 $ 98 $ 390,570 $ 52,897 $ 420,157 $ 52,995 Held to Maturity State and municipal $ — $ — $ 55,923 $ 6,387 $ 55,923 $ 6,387 Residential mortgage-backed securities — — 2,161 123 2,161 123 $ — $ — $ 58,084 $ 6,510 $ 58,084 $ 6,510 December 31, 2023 Available for Sale U.S. Government and agencies $ — $ — $ 156,795 $ 19,663 $ 156,795 $ 19,663 Collateralized mortgage obligations — — 41,085 4,104 41,085 4,104 Residential mortgage-backed securities — — 156,295 19,630 156,295 19,630 Commercial mortgage-backed securities — — 33,063 4,553 33,063 4,553 Corporate bonds — — 15,279 2,834 15,279 2,834 $ — $ — $ 402,517 $ 50,784 $ 402,517 $ 50,784 Held to Maturity State and municipal $ — $ — $ 56,713 $ 5,419 $ 56,713 $ 5,419 Residential mortgage-backed securities — — 2,344 124 2,344 124 $ — $ — $ 59,057 $ 5,543 $ 59,057 $ 5,543 All mortgage-backed security investments are government sponsored enterprise pass-through instruments issued by the Federal National Mortgage Association or Federal Home Loan Mortgage Corporation or they are issued by Government National Mortgage Association which is backed by the U.S. government. The Company evaluates AFS debt securities for impairment 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. The Company evaluates HTM debt securities for expected credit losses at each measurement date to determine if an ACL is required. In estimating credit events 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 anticipated recovery, or if it does not expect to recover the entire amortized cost basis. The Corporation does not have an ACL for HTM investment securities as of March 31, 2024 and December 31, 2023. Amortized cost and fair value at March 31, 2024, 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. Securities not due at a single maturity date are shown separately. Available for Sale Held to Maturity (In thousands) Amortized Fair Amortized Fair 1 year or less $ 15,609 $ 15,265 $ — $ — Over 1 year through 5 years 117,054 105,401 1,960 1,732 Over 5 years through 10 years 59,495 49,245 23,643 23,572 Over 10 years 2,000 1,463 36,707 30,619 Mortgage-backed securities 283,948 253,740 2,284 2,161 $ 478,106 $ 425,114 $ 64,594 $ 58,084 The proceeds from sales and calls of securities and the associated gains and losses are listed below: Three Months Ended March 31, (In thousands) 2024 2023 Proceeds $ 23,561 $ 57,524 Gross gains 87 228 Gross losses 18 421 At March 31, 2024, and December 31, 2023, securities with a carrying value of $186.1 million and $233.7 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	3 Months Ended
	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans and Allowance for Credit Losses	Loans and Allowance for Credit Losses The following table presents the composition of the loan portfolio: (In thousands) March 31, 2024 December 31, 2023 Commercial real estate $ 930,109 $ 898,709 Residential mortgage 391,864 394,189 Commercial and industrial 157,085 152,344 Home equity lines of credit 87,475 90,163 Real estate construction 90,331 84,341 Consumer 9,789 9,954 Gross loans 1,666,653 1,629,700 Unearned income (1,673) (1,712) Total loans, net of unearned income $ 1,664,980 $ 1,627,988 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 March 31, 2024 Commercial real estate $ 1,927 $ — $ 347 $ 2,274 $ 927,835 $ 930,109 $ 32 Residential mortgage 1,704 — 711 2,415 389,449 391,864 535 Commercial and industrial 52 — 158 210 156,875 157,085 — Home equity lines of credit 257 23 652 932 86,543 87,475 652 Real estate construction 97 12 — 109 90,222 90,331 — Consumer — — — — 9,789 9,789 — Gross Loans $ 4,037 $ 35 $ 1,868 $ 5,940 $ 1,660,713 $ 1,666,653 $ 1,219 (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 Gross Loans $ 1,927 $ 735 $ 1,665 $ 4,327 $ 1,625,373 $ 1,629,700 $ 1,162 Nonaccrual and Nonperforming Loans Loans individually evaluated consist of nonaccrual loans, presented in the following table: (In thousands) With a Related Allowance Without a Related Allowance Total March 31, 2024 Commercial real estate $ 315 $ 1,107 $ 1,422 Residential mortgage — 176 176 Commercial and industrial 937 — 937 Home equity lines of credit — 181 181 $ 1,252 $ 1,464 $ 2,716 December 31, 2023 Commercial real estate $ 315 $ 1,164 $ 1,479 Residential mortgage — 343 343 Commercial and industrial 1,004 — 1,004 Home equity lines of credit — 185 185 $ 1,319 $ 1,692 $ 3,011 During the three months ended March 31, 2024, no material amount of interest income was recognized on nonaccrual loans subsequent to their classification as nonaccrual. Total nonperforming loans are as follows: (In thousands) March 31, 2024 December 31, 2023 Nonaccrual loans $ 2,716 $ 3,011 Greater than or equal to 90 days past due and still accruing 1,219 1,162 Total nonperforming loans $ 3,935 $ 4,173 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. 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. The following table presents the amortized cost basis of individually evaluated loans as of the periods presented: Type of Collateral (In thousands) Business Assets Real Estate March 31, 2024 Commercial real estate $ — $ 1,422 Residential mortgage — 176 Commercial and industrial 937 — Home equity lines of credit — 181 Total $ 937 $ 1,779 December 31, 2023 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 residential mortgages and home equity lines of credit which are well secured by residential real estate properties and are in the process of collection are not considered nonaccrual, however, formal foreclosure proceedings are in process. These loans totaled $1.3 million at both March 31, 2024 and December 31, 2023 and are included in nonperforming loans if they are greater than or equal to 90 days past due. Loan Modifications 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. During both the three months ended March 31, 2024 and 2023, the Corporation did not modify any loans nor were there any commitments to lend any additional funds on existing modified loans. The following presents the performance of loans modified in the previous twelve months as of March 31, 2024: (In thousands) Current 30-89 Days Past Due ≥ 90 Days Total Past Due Commercial and industrial $ 292 $ — $ — $ — As of March 31, 2024, the Corporation had 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. 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 ACL consists of loans evaluated collectively and individually for expected credit losses. The Corporation considers the performance of the loan portfolio and its impact on the ACL and 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 Corporation 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 assigned a risk rating and those evaluated based on the performance status: March 31, 2024 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis (In thousands) 2024 2023 2022 2021 2020 Prior Total Internally Risk Rated: Commercial real estate Pass $ 45,462 $ 135,864 $ 154,328 $ 129,033 $ 58,625 $ 343,722 $ 13,858 $ 880,892 Special Mention — 1,960 5,082 6,422 2,220 23,578 1,530 40,792 Substandard — — — — 1,518 6,907 — 8,425 Total Commercial real estate $ 45,462 $ 137,824 $ 159,410 $ 135,455 $ 62,363 $ 374,207 $ 15,388 $ 930,109 Residential mortgage Pass $ 4,161 $ 39,225 $ 25,230 $ 40,049 $ 14,573 $ 35,849 $ 339 $ 159,426 Special Mention — 584 82 587 389 3,211 78 4,931 Substandard — — — — — 245 — 245 Total Residential Mortgage $ 4,161 $ 39,809 $ 25,312 $ 40,636 $ 14,962 $ 39,305 $ 417 $ 164,602 Commercial and industrial Pass $ 2,286 $ 11,844 $ 23,167 $ 33,374 $ 15,172 $ 30,579 $ 31,721 $ 148,143 Special Mention 37 167 297 268 480 547 1,812 3,608 Substandard — 432 109 472 16 1,463 2,842 5,334 Total Commercial and industrial $ 2,323 $ 12,443 $ 23,573 $ 34,114 $ 15,668 $ 32,589 $ 36,375 $ 157,085 Home equity lines of credit Pass $ — $ 299 $ 97 $ — $ — $ 128 $ 5,832 $ 6,356 Special Mention — — — — — — 742 742 Substandard — — — — — 355 — 355 Total Home equity lines of credit $ — $ 299 $ 97 $ — $ — $ 483 $ 6,574 $ 7,453 Real estate construction Pass $ 1,310 $ 25,096 $ 43,661 $ 2,353 $ 329 $ 1,155 $ 6,103 $ 80,007 Special Mention — — 459 — — 706 — 1,165 Substandard — — — — — 67 — 67 Total Real estate construction $ 1,310 $ 25,096 $ 44,120 $ 2,353 $ 329 $ 1,928 $ 6,103 $ 81,239 Performance Rated: Residential mortgage Performing $ 2,376 $ 36,651 $ 44,113 $ 14,262 $ 15,728 $ 113,526 $ 71 $ 226,727 Nonperforming — — — — — 535 — 535 Total Residential Mortgage $ 2,376 $ 36,651 $ 44,113 $ 14,262 $ 15,728 $ 114,061 $ 71 $ 227,262 Home equity lines of credit Performing $ — $ 22 $ 37 $ — $ 13 $ 3,746 $ 75,552 $ 79,370 Nonperforming — — — — — 1 651 652 Total Home equity lines of credit $ — $ 22 $ 37 $ — $ 13 $ 3,747 $ 76,203 $ 80,022 Consumer Performing $ 512 $ 2,085 $ 2,471 $ 677 $ 460 $ 1,180 $ 2,404 $ 9,789 Total Consumer $ 512 $ 2,085 $ 2,471 $ 677 $ 460 $ 1,180 $ 2,404 $ 9,789 Year-to-date gross charge-offs $ — $ — $ 5 $ — $ — $ — $ 55 $ 60 Real estate construction Performing $ 1,561 $ 5,400 $ 748 $ 172 $ 204 $ 1,005 $ 2 $ 9,092 Total Real estate construction $ 1,561 $ 5,400 $ 748 $ 172 $ 204 $ 1,005 $ 2 $ 9,092 Total Portfolio loans: Pass $ 53,219 $ 212,328 $ 246,483 $ 204,809 $ 88,699 $ 411,433 $ 57,853 $ 1,274,824 Special Mention 37 2,711 5,920 7,277 3,089 28,042 4,162 51,238 Substandard — 432 109 472 1,534 9,037 2,842 14,426 Performing 4,449 44,158 47,369 15,111 16,405 119,457 78,029 324,978 Nonperforming — — — — — 536 651 1,187 Total Portfolio loans $ 57,705 $ 259,629 $ 299,881 $ 227,669 $ 109,727 $ 568,505 $ 143,537 $ 1,666,653 Year-to-date gross charge-offs $ — $ — $ 5 $ — $ — $ — $ 55 $ 60 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 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 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 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 following table presents the activity in the ACL by loan portfolio segment: (In thousands) Commercial Residential Commercial Home Equity Real Estate Consumer Unallocated Total Three Months Ended March 31, 2024 Beginning balance - January 1, 2024 $ 12,010 $ 3,303 $ 2,048 $ 397 $ 2,070 $ 141 $ — $ 19,969 Charge-offs — — — — — (60) — (60) Recoveries — — 15 — — 25 — 40 Provisions (credits) 230 (76) (103) (83) 243 12 — 223 Ending balance - March 31, 2024 $ 12,240 $ 3,227 $ 1,960 $ 314 $ 2,313 $ 118 $ — $ 20,172 Three Months Ended March 31, 2023 Beginning balance - January 1, 2023 $ 10,016 $ 3,029 $ 2,848 $ 347 $ 1,000 $ 376 $ 245 $ 17,861 Impact of CECL adoption 1,106 297 (762) 17 1,347 (142) (245) 1,618 Charge-offs — — (29) — — (88) — (117) Recoveries — — 1 — — 25 — 26 Provisions (90) 40 47 15 118 (33) — 97 Ending balance - March 31, 2023 $ 11,032 $ 3,366 $ 2,105 $ 379 $ 2,465 $ 138 $ — $ 19,485

Deposits

Deposits	3 Months Ended
	Mar. 31, 2024
Deposits [Abstract]
Deposits	Deposits Deposits were comprised of the following for the periods presented: (In thousands) March 31, 2024 December 31, 2023 Noninterest-bearing demand deposits $ 499,583 $ 500,332 Interest-bearing demand deposits 493,783 524,289 Money market 252,363 264,907 Savings 332,213 340,134 Total demand and savings 1,577,942 1,629,662 Time 257,282 232,151 Total deposits $ 1,835,224 $ 1,861,813 Scheduled maturities of time certificates of deposit at March 31, 2024 are as follows: Time Deposits Year Less than $250,000 $250,000 or more Less than 1 year $ 176,531 $ 46,675 1 through 2 years 20,264 1,495 2 through 3 years 6,231 254 3 through 4 years 3,946 — 4 through 5 years 1,874 — Thereafter 12 — Total time deposits $ 208,858 $ 48,424

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Borrowings	Borrowings Short-term borrowings were comprised of the following for the periods presented: (In thousands) March 31, 2024 December 31, 2023 Securities sold under repurchase agreements $ 17,303 $ 26,882 FHLB advance — 30,000 $ 17,303 $ 56,882 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 $10.6 million at March 31, 2024. 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 March 31, 2024 and December 31, 2023. Long-term borrowings were comprised of the following for the periods presented: (In thousands) March 31, 2024 December 31, 2023 FHLB fixed-rate advances maturing: 2026 $ 80,000 $ 80,000 2027 90,000 60,000 2028 35,000 35,000 2029 30,000 — Trust preferred subordinated debt 5,302 5,292 Subordinated debt 15,000 15,000 $ 255,302 $ 195,292 The long-term FHLB advances have a weighted average rate of 4.52%, and 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 $883.2 million, of which $647.1 million was available at March 31, 2024. 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 bps over the three-month CME Term SOFR plus applicable tenor spread adjustment. On March 15, 2024, the most recent interest rate reset date, the interest rate was adjusted to 7.22% for the period ending June 16, 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, the Company entered into Purchase Agreements with the Purchasers pursuant to which the Company 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 bps. 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 Company 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 Notes are considered Tier 2 capital for the consolidated capital ratios.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2024
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 the periods presented: March 31, 2024 (In thousands) Basis Level 1 Level 2 Level 3 Total Equity securities with readily determinable fair values Recurring $ 918 $ — $ — $ 918 AFS Investment Securities: U.S. Government and agencies — 155,821 — 155,821 Collateralized mortgage obligations — 39,506 — 39,506 Residential mortgage-backed securities — 152,580 — 152,580 Commercial mortgage-backed securities — 61,654 — 61,654 Corporate bonds — 15,553 — 15,553 Total AFS Investment Securities Recurring — 425,114 — 425,114 Loans held for sale Recurring — 88 — 88 Individually evaluated loans Non-recurring — — 294 294 Foreclosed assets held for resale Non-recurring — — 467 467 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 Collateralized mortgage obligations — 41,084 — 41,084 Residential mortgage-backed securities — 158,830 — 158,830 Commercial mortgage-backed securities — 65,290 — 65,290 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 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 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 March 31, 2024 and December 31, 2023, 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: (Dollars in thousands) Fair Value Estimate Valuation Technique (1) Unobservable Input (2) Range Weighted Average March 31, 2024 Individually evaluated loans $ 294 Appraisal of collateral Appraisal adjustments (33) – (100)% (93)% Foreclosed assets held for resale 467 Appraisal of collateral Appraisal adjustments (56) (56) December 31, 2023 Individually evaluated loans $ 242 Appraisal of collateral Appraisal adjustments (33) – (100)% (94)% Foreclosed assets held for resale 467 Appraisal of collateral Appraisal adjustments (56) (56) _______________________________ (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: March 31, 2024 Estimated Fair Value (In thousands) Carrying Amount Total Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 17,395 $ 17,395 $ 17,395 $ — $ — Interest-bearing deposits with banks 35,740 35,740 35,740 — — Equity securities with readily determinable fair values 918 918 918 — — Investment securities AFS 425,114 425,114 — 425,114 — Investment securities HTM 64,594 58,084 — 58,084 — Loans held for sale 88 88 — 88 — Loans, net 1,644,808 1,588,788 — — 1,588,788 Accrued interest receivable 8,140 8,140 — 8,140 — Restricted investment in bank stocks 10,877 10,877 — 10,877 — Financial liabilities: Demand deposits, savings, and money markets 1,577,942 1,323,123 — 1,323,123 — Time deposits 257,282 246,272 — 246,272 — Securities sold under repurchase agreements 17,303 18,106 — 18,106 — FHLB Advances 235,000 235,588 — 235,588 — Trust preferred and subordinated debt 20,302 18,277 — 18,277 — Accrued interest payable 1,476 1,476 — 1,476 — 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 AFS 451,693 451,693 — 451,693 — Investment securities HTM 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 — 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 Benefits

Retirement Benefits	3 Months Ended
	Mar. 31, 2024
Postemployment Benefits [Abstract]
Retirement Benefits	Retirement Benefits The components of net periodic benefit income related to the non-contributory, defined benefit pension plan were as follows: Three Months Ended March 31, (In thousands) 2024 2023 Service cost $ 107 $ 124 Interest cost 374 373 Expected return on plan assets (712) (663) Amortization of net loss 19 98 Net Periodic Benefit Income $ (212) $ (68) The Corporation has determined that it will not be contributing to the defined benefit plan in 2024 based on current levels and expected returns on plan assets. Effective April 1, 2012, no inactive or former participant in the plan is eligible to again participate in the plan, and no employee hired after March 31, 2012, is eligible to participate in the plan.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Risks and Uncertainties [Abstract]
Commitments and Contingencies Disclosure	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 March 31, 2024 and at December 31, 2023. 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 were as follows: (In thousands) March 31, 2024 December 31, 2023 Commitments to extend credit $ 391,241 $ 403,300 Standby letters of credit 17,886 21,029 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.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2024
Stockholders' Equity Note [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss, net of taxes, are as follows: (In thousands) Unrealized (Losses) Gains on Securities Pension Accumulated Other Balance at December 31, 2022 $ (52,734) $ (5,278) $ (58,012) Unrealized gain on AFS securities, net of tax 5,136 — 5,136 Realized losses on securities, net of tax (146) — (146) Amortization of unrealized losses on securities transferred to HTM, net of tax 1,014 — 1,014 Amortization of pension net loss, transition liability and prior service cost, net of tax — 48 48 Net current period other comprehensive income 6,004 48 6,052 Balance at March 31, 2023 $ (46,730) $ (5,230) $ (51,960) Balance at December 31, 2023 $ (40,952) $ (3,957) $ (44,909) Unrealized loss on AFS securities, net of tax (2,198) — (2,198) Realized gains on securities, net of tax 53 — 53 Amortization of unrealized losses on securities transferred to HTM, net of tax 215 — 215 Amortization of pension net loss, transition liability and prior service cost, net of tax — 15 15 Net current period other comprehensive (loss) income (1,930) 15 (1,915) Balance at March 31, 2024 $ (42,882) $ (3,942) $ (46,824)

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Corporation has two reporting segments, the Bank and ACNB Insurance Services. ACNB Insurance Services is managed separately from the banking segment, which includes the Bank and related financial services that the Corporation offers through its banking subsidiary. ACNB Insurance Services offers a broad range of property, casualty, health, life and disability insurance to both commercial and individual clients. Segment information as of and for the three month periods ended March 31, 2024 and 2023 is as follows: (In thousands) Banking Insurance Total 2024 Interest income and other income from external customers $ 29,526 $ 2,115 $ 31,641 Interest expense 5,381 — 5,381 Depreciation and amortization expense 566 200 766 Income before income taxes 8,454 72 8,526 Total assets 2,392,392 21,896 2,414,288 Goodwill 35,800 8,385 44,185 Capital expenditures 78 — 78 2023 Interest income and other income from external customers $ 26,991 $ 1,902 $ 28,893 Interest expense 817 — 817 Depreciation and amortization expense 673 210 883 Income before income taxes 11,292 129 11,421 Goodwill 35,800 8,385 44,185 Total assets 2,391,583 19,350 2,410,933 Capital expenditures 52 6 58

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 6,768	$ 9,023

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Earnings Per Share and Restri_2

Earnings Per Share and Restricted Stock (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	Diluted earnings per share is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding. Three Months Ended March 31, 2024 2023 Weighted average shares outstanding (basic) 8,493,104 8,511,244 Dilutive effect of unvested shares 18,544 11,732 Weighted average shares outstanding (diluted) 8,511,648 8,522,976 Per share: Basic $ 0.80 $ 1.06 Diluted 0.80 1.06

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost and fair value of securities	Fair value of equity securities with readily determinable fair values at March 31, 2024 and December 31, 2023, are as follows: (In thousands) Fair Value at Beginning of Period Sales/reclassification (Losses) Gains Losses on sales of securities Fair Value at End of Period Three Months Ended March 31, 2024 CRA Mutual Fund $ 928 $ — $ (10) $ — $ 918 Twelve Months Ended December 31, 2023 CRA Mutual Fund $ 915 $ — $ 13 $ — $ 928 Canapi Ventures SBIC Fund 206 206 — — — Stock in other banks 598 592 5 (11) — $ 1,719 $ 798 $ 18 $ (11) $ 928 Amortized cost and fair value of securities were as follows: (In thousands) Amortized Gross Gross Fair March 31, 2024 Available for Sale U.S. Government and agencies $ 176,049 $ — $ 20,228 $ 155,821 Collateralized mortgage obligations 43,892 — 4,386 39,506 Residential mortgage-backed securities 173,920 — 21,340 152,580 Commercial mortgage-backed securities 66,136 3 4,485 61,654 Corporate bonds 18,109 — 2,556 15,553 $ 478,106 $ 3 $ 52,995 $ 425,114 Held to Maturity State and municipal $ 62,310 $ — $ 6,387 $ 55,923 Residential mortgage-backed securities 2,284 — 123 2,161 $ 64,594 $ — $ 6,510 $ 58,084 December 31, 2023 Available for Sale U.S. Government and agencies $ 176,458 $ — $ 19,663 $ 156,795 Collateralized mortgage obligations 45,189 — 4,105 41,084 Residential mortgage-backed securities 178,441 19 19,630 158,830 Commercial mortgage-backed securities 69,498 344 4,552 65,290 Corporate bonds 32,326 202 2,834 29,694 $ 501,912 $ 565 $ 50,784 $ 451,693 Held to Maturity State and municipal $ 62,133 $ — $ 5,419 $ 56,714 Residential mortgage-backed securities 2,467 — 124 2,343 $ 64,600 $ — $ 5,543 $ 59,057
Schedule of unrealized losses and fair value	The following table shows the Corporation’s investments’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at March 31, 2024, and December 31, 2023: Less than 12 Months 12 Months or More Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized March 31, 2024 Available for Sale U.S. Government and agencies $ — $ — $ 155,821 $ 20,228 $ 155,821 $ 20,228 Collateralized mortgage obligations — — 39,506 4,386 39,506 4,386 Residential mortgage-backed securities 2,737 6 149,843 21,334 152,580 21,340 Commercial mortgage-backed securities 26,850 92 29,847 4,393 56,697 4,485 Corporate bonds — — 15,553 2,556 15,553 2,556 $ 29,587 $ 98 $ 390,570 $ 52,897 $ 420,157 $ 52,995 Held to Maturity State and municipal $ — $ — $ 55,923 $ 6,387 $ 55,923 $ 6,387 Residential mortgage-backed securities — — 2,161 123 2,161 123 $ — $ — $ 58,084 $ 6,510 $ 58,084 $ 6,510 December 31, 2023 Available for Sale U.S. Government and agencies $ — $ — $ 156,795 $ 19,663 $ 156,795 $ 19,663 Collateralized mortgage obligations — — 41,085 4,104 41,085 4,104 Residential mortgage-backed securities — — 156,295 19,630 156,295 19,630 Commercial mortgage-backed securities — — 33,063 4,553 33,063 4,553 Corporate bonds — — 15,279 2,834 15,279 2,834 $ — $ — $ 402,517 $ 50,784 $ 402,517 $ 50,784 Held to Maturity State and municipal $ — $ — $ 56,713 $ 5,419 $ 56,713 $ 5,419 Residential mortgage-backed securities — — 2,344 124 2,344 124 $ — $ — $ 59,057 $ 5,543 $ 59,057 $ 5,543
Schedule of amortized cost and fair value by contractual maturity	Amortized cost and fair value at March 31, 2024, 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. Securities not due at a single maturity date are shown separately. Available for Sale Held to Maturity (In thousands) Amortized Fair Amortized Fair 1 year or less $ 15,609 $ 15,265 $ — $ — Over 1 year through 5 years 117,054 105,401 1,960 1,732 Over 5 years through 10 years 59,495 49,245 23,643 23,572 Over 10 years 2,000 1,463 36,707 30,619 Mortgage-backed securities 283,948 253,740 2,284 2,161 $ 478,106 $ 425,114 $ 64,594 $ 58,084
Gain (Loss) on Securities	The proceeds from sales and calls of securities and the associated gains and losses are listed below: Three Months Ended March 31, (In thousands) 2024 2023 Proceeds $ 23,561 $ 57,524 Gross gains 87 228 Gross losses 18 421

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Schedule of the composition of the loan portfolio	The following table presents the composition of the loan portfolio: (In thousands) March 31, 2024 December 31, 2023 Commercial real estate $ 930,109 $ 898,709 Residential mortgage 391,864 394,189 Commercial and industrial 157,085 152,344 Home equity lines of credit 87,475 90,163 Real estate construction 90,331 84,341 Consumer 9,789 9,954 Gross loans 1,666,653 1,629,700 Unearned income (1,673) (1,712) Total loans, net of unearned income $ 1,664,980 $ 1,627,988
Schedule of classes of 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 March 31, 2024 Commercial real estate $ 1,927 $ — $ 347 $ 2,274 $ 927,835 $ 930,109 $ 32 Residential mortgage 1,704 — 711 2,415 389,449 391,864 535 Commercial and industrial 52 — 158 210 156,875 157,085 — Home equity lines of credit 257 23 652 932 86,543 87,475 652 Real estate construction 97 12 — 109 90,222 90,331 — Consumer — — — — 9,789 9,789 — Gross Loans $ 4,037 $ 35 $ 1,868 $ 5,940 $ 1,660,713 $ 1,666,653 $ 1,219 (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 Gross Loans $ 1,927 $ 735 $ 1,665 $ 4,327 $ 1,625,373 $ 1,629,700 $ 1,162
Schedule of nonaccrual loans by loan portfolio class	Loans individually evaluated consist of nonaccrual loans, presented in the following table: (In thousands) With a Related Allowance Without a Related Allowance Total March 31, 2024 Commercial real estate $ 315 $ 1,107 $ 1,422 Residential mortgage — 176 176 Commercial and industrial 937 — 937 Home equity lines of credit — 181 181 $ 1,252 $ 1,464 $ 2,716 December 31, 2023 Commercial real estate $ 315 $ 1,164 $ 1,479 Residential mortgage — 343 343 Commercial and industrial 1,004 — 1,004 Home equity lines of credit — 185 185 $ 1,319 $ 1,692 $ 3,011
Schedule of Nonperforming Loans	Total nonperforming loans are as follows: (In thousands) March 31, 2024 December 31, 2023 Nonaccrual loans $ 2,716 $ 3,011 Greater than or equal to 90 days past due and still accruing 1,219 1,162 Total nonperforming loans $ 3,935 $ 4,173
Financing Receivable, Amortized Cost Basis	The following table presents the amortized cost basis of individually evaluated loans as of the periods presented: Type of Collateral (In thousands) Business Assets Real Estate March 31, 2024 Commercial real estate $ — $ 1,422 Residential mortgage — 176 Commercial and industrial 937 — Home equity lines of credit — 181 Total $ 937 $ 1,779 December 31, 2023 Commercial real estate $ — $ 1,479 Residential mortgage — 343 Commercial and industrial 1,004 — Home equity lines of credit — 185 Total $ 1,004 $ 2,007
Schedule of expected commercial loan modifications	The following presents the performance of loans modified in the previous twelve months as of March 31, 2024: (In thousands) Current 30-89 Days Past Due ≥ 90 Days Total Past Due Commercial and industrial $ 292 $ — $ — $ —
Financing Receivable, Loan Portfolio Class	The following summarizes designated internal risk categories by portfolio segment for loans assigned a risk rating and those evaluated based on the performance status: March 31, 2024 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis (In thousands) 2024 2023 2022 2021 2020 Prior Total Internally Risk Rated: Commercial real estate Pass $ 45,462 $ 135,864 $ 154,328 $ 129,033 $ 58,625 $ 343,722 $ 13,858 $ 880,892 Special Mention — 1,960 5,082 6,422 2,220 23,578 1,530 40,792 Substandard — — — — 1,518 6,907 — 8,425 Total Commercial real estate $ 45,462 $ 137,824 $ 159,410 $ 135,455 $ 62,363 $ 374,207 $ 15,388 $ 930,109 Residential mortgage Pass $ 4,161 $ 39,225 $ 25,230 $ 40,049 $ 14,573 $ 35,849 $ 339 $ 159,426 Special Mention — 584 82 587 389 3,211 78 4,931 Substandard — — — — — 245 — 245 Total Residential Mortgage $ 4,161 $ 39,809 $ 25,312 $ 40,636 $ 14,962 $ 39,305 $ 417 $ 164,602 Commercial and industrial Pass $ 2,286 $ 11,844 $ 23,167 $ 33,374 $ 15,172 $ 30,579 $ 31,721 $ 148,143 Special Mention 37 167 297 268 480 547 1,812 3,608 Substandard — 432 109 472 16 1,463 2,842 5,334 Total Commercial and industrial $ 2,323 $ 12,443 $ 23,573 $ 34,114 $ 15,668 $ 32,589 $ 36,375 $ 157,085 Home equity lines of credit Pass $ — $ 299 $ 97 $ — $ — $ 128 $ 5,832 $ 6,356 Special Mention — — — — — — 742 742 Substandard — — — — — 355 — 355 Total Home equity lines of credit $ — $ 299 $ 97 $ — $ — $ 483 $ 6,574 $ 7,453 Real estate construction Pass $ 1,310 $ 25,096 $ 43,661 $ 2,353 $ 329 $ 1,155 $ 6,103 $ 80,007 Special Mention — — 459 — — 706 — 1,165 Substandard — — — — — 67 — 67 Total Real estate construction $ 1,310 $ 25,096 $ 44,120 $ 2,353 $ 329 $ 1,928 $ 6,103 $ 81,239 Performance Rated: Residential mortgage Performing $ 2,376 $ 36,651 $ 44,113 $ 14,262 $ 15,728 $ 113,526 $ 71 $ 226,727 Nonperforming — — — — — 535 — 535 Total Residential Mortgage $ 2,376 $ 36,651 $ 44,113 $ 14,262 $ 15,728 $ 114,061 $ 71 $ 227,262 Home equity lines of credit Performing $ — $ 22 $ 37 $ — $ 13 $ 3,746 $ 75,552 $ 79,370 Nonperforming — — — — — 1 651 652 Total Home equity lines of credit $ — $ 22 $ 37 $ — $ 13 $ 3,747 $ 76,203 $ 80,022 Consumer Performing $ 512 $ 2,085 $ 2,471 $ 677 $ 460 $ 1,180 $ 2,404 $ 9,789 Total Consumer $ 512 $ 2,085 $ 2,471 $ 677 $ 460 $ 1,180 $ 2,404 $ 9,789 Year-to-date gross charge-offs $ — $ — $ 5 $ — $ — $ — $ 55 $ 60 Real estate construction Performing $ 1,561 $ 5,400 $ 748 $ 172 $ 204 $ 1,005 $ 2 $ 9,092 Total Real estate construction $ 1,561 $ 5,400 $ 748 $ 172 $ 204 $ 1,005 $ 2 $ 9,092 Total Portfolio loans: Pass $ 53,219 $ 212,328 $ 246,483 $ 204,809 $ 88,699 $ 411,433 $ 57,853 $ 1,274,824 Special Mention 37 2,711 5,920 7,277 3,089 28,042 4,162 51,238 Substandard — 432 109 472 1,534 9,037 2,842 14,426 Performing 4,449 44,158 47,369 15,111 16,405 119,457 78,029 324,978 Nonperforming — — — — — 536 651 1,187 Total Portfolio loans $ 57,705 $ 259,629 $ 299,881 $ 227,669 $ 109,727 $ 568,505 $ 143,537 $ 1,666,653 Year-to-date gross charge-offs $ — $ — $ 5 $ — $ — $ — $ 55 $ 60 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 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 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 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
Summary of allowance for loan losses and recorded investment in loans receivable	The following table presents the activity in the ACL by loan portfolio segment: (In thousands) Commercial Residential Commercial Home Equity Real Estate Consumer Unallocated Total Three Months Ended March 31, 2024 Beginning balance - January 1, 2024 $ 12,010 $ 3,303 $ 2,048 $ 397 $ 2,070 $ 141 $ — $ 19,969 Charge-offs — — — — — (60) — (60) Recoveries — — 15 — — 25 — 40 Provisions (credits) 230 (76) (103) (83) 243 12 — 223 Ending balance - March 31, 2024 $ 12,240 $ 3,227 $ 1,960 $ 314 $ 2,313 $ 118 $ — $ 20,172 Three Months Ended March 31, 2023 Beginning balance - January 1, 2023 $ 10,016 $ 3,029 $ 2,848 $ 347 $ 1,000 $ 376 $ 245 $ 17,861 Impact of CECL adoption 1,106 297 (762) 17 1,347 (142) (245) 1,618 Charge-offs — — (29) — — (88) — (117) Recoveries — — 1 — — 25 — 26 Provisions (90) 40 47 15 118 (33) — 97 Ending balance - March 31, 2023 $ 11,032 $ 3,366 $ 2,105 $ 379 $ 2,465 $ 138 $ — $ 19,485

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2024
Deposits [Abstract]
Deposit Liabilities, Type	Deposits were comprised of the following for the periods presented: (In thousands) March 31, 2024 December 31, 2023 Noninterest-bearing demand deposits $ 499,583 $ 500,332 Interest-bearing demand deposits 493,783 524,289 Money market 252,363 264,907 Savings 332,213 340,134 Total demand and savings 1,577,942 1,629,662 Time 257,282 232,151 Total deposits $ 1,835,224 $ 1,861,813
Time Deposit Maturities	Scheduled maturities of time certificates of deposit at March 31, 2024 are as follows: Time Deposits Year Less than $250,000 $250,000 or more Less than 1 year $ 176,531 $ 46,675 1 through 2 years 20,264 1,495 2 through 3 years 6,231 254 3 through 4 years 3,946 — 4 through 5 years 1,874 — Thereafter 12 — Total time deposits $ 208,858 $ 48,424

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Schedule of short-term debt outstanding	Short-term borrowings were comprised of the following for the periods presented: (In thousands) March 31, 2024 December 31, 2023 Securities sold under repurchase agreements $ 17,303 $ 26,882 FHLB advance — 30,000 $ 17,303 $ 56,882
Schedule of long-term debt outstanding	Long-term borrowings were comprised of the following for the periods presented: (In thousands) March 31, 2024 December 31, 2023 FHLB fixed-rate advances maturing: 2026 $ 80,000 $ 80,000 2027 90,000 60,000 2028 35,000 35,000 2029 30,000 — Trust preferred subordinated debt 5,302 5,292 Subordinated debt 15,000 15,000 $ 255,302 $ 195,292

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of fair value measurements by level within the fair value hierarchy and the basis of measurement used	The following tables present assets measured at fair value and the basis of measurement used at the periods presented: March 31, 2024 (In thousands) Basis Level 1 Level 2 Level 3 Total Equity securities with readily determinable fair values Recurring $ 918 $ — $ — $ 918 AFS Investment Securities: U.S. Government and agencies — 155,821 — 155,821 Collateralized mortgage obligations — 39,506 — 39,506 Residential mortgage-backed securities — 152,580 — 152,580 Commercial mortgage-backed securities — 61,654 — 61,654 Corporate bonds — 15,553 — 15,553 Total AFS Investment Securities Recurring — 425,114 — 425,114 Loans held for sale Recurring — 88 — 88 Individually evaluated loans Non-recurring — — 294 294 Foreclosed assets held for resale Non-recurring — — 467 467 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 Collateralized mortgage obligations — 41,084 — 41,084 Residential mortgage-backed securities — 158,830 — 158,830 Commercial mortgage-backed securities — 65,290 — 65,290 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
Schedule of additional quantitative information about assets measured at fair value on a nonrecurring basis	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: (Dollars in thousands) Fair Value Estimate Valuation Technique (1) Unobservable Input (2) Range Weighted Average March 31, 2024 Individually evaluated loans $ 294 Appraisal of collateral Appraisal adjustments (33) – (100)% (93)% Foreclosed assets held for resale 467 Appraisal of collateral Appraisal adjustments (56) (56) December 31, 2023 Individually evaluated loans $ 242 Appraisal of collateral Appraisal adjustments (33) – (100)% (94)% Foreclosed assets held for resale 467 Appraisal of collateral Appraisal adjustments (56) (56) _______________________________ (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.
Schedule of carrying amount, exit pricing concept fair value and placement in the fair value hierarchy	The following tables present the carrying amount and the estimated fair value of the Corporation’s financial instruments: March 31, 2024 Estimated Fair Value (In thousands) Carrying Amount Total Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 17,395 $ 17,395 $ 17,395 $ — $ — Interest-bearing deposits with banks 35,740 35,740 35,740 — — Equity securities with readily determinable fair values 918 918 918 — — Investment securities AFS 425,114 425,114 — 425,114 — Investment securities HTM 64,594 58,084 — 58,084 — Loans held for sale 88 88 — 88 — Loans, net 1,644,808 1,588,788 — — 1,588,788 Accrued interest receivable 8,140 8,140 — 8,140 — Restricted investment in bank stocks 10,877 10,877 — 10,877 — Financial liabilities: Demand deposits, savings, and money markets 1,577,942 1,323,123 — 1,323,123 — Time deposits 257,282 246,272 — 246,272 — Securities sold under repurchase agreements 17,303 18,106 — 18,106 — FHLB Advances 235,000 235,588 — 235,588 — Trust preferred and subordinated debt 20,302 18,277 — 18,277 — Accrued interest payable 1,476 1,476 — 1,476 — 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 AFS 451,693 451,693 — 451,693 — Investment securities HTM 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 —

Retirement Benefits (Tables)

Retirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2024
Postemployment Benefits [Abstract]
Schedule of net periodic benefit expense (income)	The components of net periodic benefit income related to the non-contributory, defined benefit pension plan were as follows: Three Months Ended March 31, (In thousands) 2024 2023 Service cost $ 107 $ 124 Interest cost 374 373 Expected return on plan assets (712) (663) Amortization of net loss 19 98 Net Periodic Benefit Income $ (212) $ (68)

Commitment and Contingencies (T

Commitment and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2024
Risks and Uncertainties [Abstract]
Schedule of Fair Value, off-Balance-Sheet Risks	A summary of the Corporation’s commitments were as follows: (In thousands) March 31, 2024 December 31, 2023 Commitments to extend credit $ 391,241 $ 403,300 Standby letters of credit 17,886 21,029

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2024
Stockholders' Equity Note [Abstract]
Schedule of accumulated other comprehensive loss	The components of accumulated other comprehensive loss, net of taxes, are as follows: (In thousands) Unrealized (Losses) Gains on Securities Pension Accumulated Other Balance at December 31, 2022 $ (52,734) $ (5,278) $ (58,012) Unrealized gain on AFS securities, net of tax 5,136 — 5,136 Realized losses on securities, net of tax (146) — (146) Amortization of unrealized losses on securities transferred to HTM, net of tax 1,014 — 1,014 Amortization of pension net loss, transition liability and prior service cost, net of tax — 48 48 Net current period other comprehensive income 6,004 48 6,052 Balance at March 31, 2023 $ (46,730) $ (5,230) $ (51,960) Balance at December 31, 2023 $ (40,952) $ (3,957) $ (44,909) Unrealized loss on AFS securities, net of tax (2,198) — (2,198) Realized gains on securities, net of tax 53 — 53 Amortization of unrealized losses on securities transferred to HTM, net of tax 215 — 215 Amortization of pension net loss, transition liability and prior service cost, net of tax — 15 15 Net current period other comprehensive (loss) income (1,930) 15 (1,915) Balance at March 31, 2024 $ (42,882) $ (3,942) $ (46,824)

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Schedule of Segment Information	Segment information as of and for the three month periods ended March 31, 2024 and 2023 is as follows: (In thousands) Banking Insurance Total 2024 Interest income and other income from external customers $ 29,526 $ 2,115 $ 31,641 Interest expense 5,381 — 5,381 Depreciation and amortization expense 566 200 766 Income before income taxes 8,454 72 8,526 Total assets 2,392,392 21,896 2,414,288 Goodwill 35,800 8,385 44,185 Capital expenditures 78 — 78 2023 Interest income and other income from external customers $ 26,991 $ 1,902 $ 28,893 Interest expense 817 — 817 Depreciation and amortization expense 673 210 883 Income before income taxes 11,292 129 11,421 Goodwill 35,800 8,385 44,185 Total assets 2,391,583 19,350 2,410,933 Capital expenditures 52 6 58

Basis of Presentation and Nat_2

Basis of Presentation and Nature of Operations (Details)	3 Months Ended
	Mar. 31, 2024 bank
Business Acquisition [Line Items]
Number of community banking office locations, ACNB	26
Adams, Cumberland, Franklin and York Counties, Pennsylvania
Business Acquisition [Line Items]
Number of community banking office locations, ACNB	17
Carroll and Frederick Counties, Maryland
Business Acquisition [Line Items]
Number of community banking office locations, ACNB	9

Earnings Per Share and Restri_3

Earnings Per Share and Restricted Stock (Details) $ / shares in Units, $ in Thousands		3 Months Ended		17 Months Ended
	Feb. 24, 2019	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2024 shares	Oct. 18, 2022 shares	Mar. 08, 2019 shares	Mar. 20, 2018 shares
Earnings Per Share [Abstract]
Weighted average shares of common stock outstanding, basic (in shares)		8,493,104	8,511,244
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average shares of common stock outstanding, basic (in shares)		8,493,104	8,511,244
Dilutive effect of unvested shares (in shares)		18,544	11,732
Weighted average shares outstanding, diluted (in shares)		8,511,648	8,522,976
Basic earnings (in dollars per share) | $ / shares		$ 0.80	$ 1.06
Diluted earnings (in dollars per share) | $ / shares		$ 0.80	$ 1.06
2009 Restricted Stock Plan, Number of shares authorized, but not issued (in shares)						174,055
ACNB Corporation 2009 Restricted Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2009 Restricted Stock Plan, expiration period	10 years
ACNB Corporation 2018 Omnibus Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock under new stock incentive plan (in shares)							400,000
ACNB Corporation 2018 Omnibus Stock Incentive Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested number of shares (in shares)		38,438		38,438
Shares issued under plan (in shares)		138,019		138,019
Compensation expense | $		$ 534	$ 495
Stock Repurchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased					255,575
Stock Repurchase Program, Number of Shares Authorized to be Repurchased, Percentage of Outstanding Shares					0.03
Common stock shares repurchased (in shares)		4,200	850	65,266

Investment Securities - Schedul

Investment Securities - Schedule of Required Fair Value Disclosures for Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	$ 928	$ 1,719	$ 1,719
Sales/reclassification			798
(Losses) Gains	(10)	20	18
Losses on sales of securities			(11)
Fair value at end of period	918		928
CRA Mutual Fund
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	928	915	915
Sales/reclassification	0		0
(Losses) Gains	(10)		13
Losses on sales of securities	0		0
Fair value at end of period	918		928
Canapi Ventures SBIC Fund
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	0	206	206
Sales/reclassification			206
(Losses) Gains			0
Losses on sales of securities			0
Fair value at end of period			0
Stock In Other Banks
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward]
Fair value at beginning of period	$ 0	$ 598	598
Sales/reclassification			592
(Losses) Gains			5
Losses on sales of securities			(11)
Fair value at end of period			$ 0

Investment Securities - Sched_2

Investment Securities - Schedule of Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Available-for-sale, Amortized Cost	$ 478,106	$ 501,912
Gross Unrealized Gains	3	565
Gross Unrealized Losses	52,995	50,784
Investment securities available for sale, at estimated fair value	425,114	451,693
Held to Maturity
Amortized Cost	64,594	64,600
Gross Unrealized Gains	0	0
Gross Unrealized Losses	6,510	5,543
Fair Value	58,084	59,057
U.S. Government and agencies
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Available-for-sale, Amortized Cost	176,049	176,458
Gross Unrealized Gains	0	0
Gross Unrealized Losses	20,228	19,663
Investment securities available for sale, at estimated fair value	155,821	156,795
Collateralized mortgage obligations
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Available-for-sale, Amortized Cost	43,892	45,189
Gross Unrealized Gains	0	0
Gross Unrealized Losses	4,386	4,105
Investment securities available for sale, at estimated fair value	39,506	41,084
Residential mortgage-backed securities
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Available-for-sale, Amortized Cost	173,920	178,441
Gross Unrealized Gains	0	19
Gross Unrealized Losses	21,340	19,630
Investment securities available for sale, at estimated fair value	152,580	158,830
Held to Maturity
Amortized Cost	2,284	2,467
Gross Unrealized Gains	0	0
Gross Unrealized Losses	123	124
Fair Value	2,161	2,343
Commercial mortgage-backed securities
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Available-for-sale, Amortized Cost	66,136	69,498
Gross Unrealized Gains	3	344
Gross Unrealized Losses	4,485	4,552
Investment securities available for sale, at estimated fair value	61,654	65,290
Corporate bonds
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract]
Available-for-sale, Amortized Cost	18,109	32,326
Gross Unrealized Gains	0	202
Gross Unrealized Losses	2,556	2,834
Investment securities available for sale, at estimated fair value	15,553	29,694
State and municipal
Held to Maturity
Amortized Cost	62,310	62,133
Gross Unrealized Gains	0	0
Gross Unrealized Losses	6,387	5,419
Fair Value	$ 55,923	$ 56,714

Investment Securities - Sched_3

Investment Securities - Schedule of Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Available for Sale
Fair Value, Less than 12 Months	$ 29,587	$ 0
Unrealized Losses, Less than 12 Months	98	0
Fair Value, 12 Months or More	390,570	402,517
Unrealized Losses, 12 Months or More	52,897	50,784
Total Fair Value	420,157	402,517
Total Unrealized Losses	52,995	50,784
Held to Maturity
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	58,084	59,057
Unrealized Losses, 12 Months or More	6,510	5,543
Total Fair Value	58,084	59,057
Total Unrealized Losses	6,510	5,543
U.S. Government and agencies
Available for Sale
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	155,821	156,795
Unrealized Losses, 12 Months or More	20,228	19,663
Total Fair Value	155,821	156,795
Total Unrealized Losses	20,228	19,663
Collateralized mortgage obligations
Available for Sale
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	39,506	41,085
Unrealized Losses, 12 Months or More	4,386	4,104
Total Fair Value	39,506	41,085
Total Unrealized Losses	4,386	4,104
Residential mortgage-backed securities
Available for Sale
Fair Value, Less than 12 Months	2,737	0
Unrealized Losses, Less than 12 Months	6	0
Fair Value, 12 Months or More	149,843	156,295
Unrealized Losses, 12 Months or More	21,334	19,630
Total Fair Value	152,580	156,295
Total Unrealized Losses	21,340	19,630
Held to Maturity
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	2,161	2,344
Unrealized Losses, 12 Months or More	123	124
Total Fair Value	2,161	2,344
Total Unrealized Losses	123	124
Commercial mortgage-backed securities
Available for Sale
Fair Value, Less than 12 Months	26,850	0
Unrealized Losses, Less than 12 Months	92	0
Fair Value, 12 Months or More	29,847	33,063
Unrealized Losses, 12 Months or More	4,393	4,553
Total Fair Value	56,697	33,063
Total Unrealized Losses	4,485	4,553
Corporate bonds
Available for Sale
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	15,553	15,279
Unrealized Losses, 12 Months or More	2,556	2,834
Total Fair Value	15,553	15,279
Total Unrealized Losses	2,556	2,834
State and municipal
Held to Maturity
Fair Value, Less than 12 Months	0	0
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	55,923	56,713
Unrealized Losses, 12 Months or More	6,387	5,419
Total Fair Value	55,923	56,713
Total Unrealized Losses	$ 6,387	$ 5,419

Investment Securities - Narrati

Investment Securities - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Carrying value of securities pledged as collateral as required by law on public and trust deposits, repurchase agreements, and for other purposes	$ 186.1	$ 233.7

Investment Securities - Sched_4

Investment Securities - Schedule of Amortized Cost and Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Available for Sale Amortized Cost
1 year or less	$ 15,609
Over 1 year through 5 years	117,054
Over 5 years through 10 years	59,495
Over 10 years	2,000
Without single maturity date	283,948
Available-for-sale, Amortized Cost	478,106	$ 501,912
Available for Sale Fair Value
1 year or less	15,265
Over 1 year through 5 years	105,401
Over 5 years through 10 years	49,245
Over 10 years	1,463
Without single maturity date	253,740
Available for Sale, Fair Value	425,114	451,693
Held-to-Maturity Amortized Cost
1 year or less	0
Over 1 year through 5 years	1,960
Over 5 years through 10 years	23,643
Over 10 years	36,707
Mortgage-backed securities	2,284
Amortized Cost	64,594	64,600
Held-to-Maturity Fair Value
1 year or less	0
Over 1 year through 5 years	1,732
Over 5 years through 10 years	23,572
Over 10 years	30,619
Mortgage-backed securities	2,161
Held to Maturity, Fair Value	$ 58,084	$ 59,057

Investment Securities - Gain (L

Investment Securities - Gain (Loss) on Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 23,561	$ 57,524
Gross gains	87	228
Gross losses	$ 18	$ 421

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Schedule of the Composition of the Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	$ 1,666,653	$ 1,629,700
Financing Receivable, Unearned Income, before Allowance for Credit Loss	(1,673)	(1,712)
Total loans, net of unearned income	1,664,980	1,627,988
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	930,109	898,709
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	391,864	394,189
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	157,085	152,344
Home equity lines of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	87,475	90,163
Real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	90,331	84,341
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, before allowance for credit loss	$ 9,789	$ 9,954

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Schedule of Loan Portfolio Summarized by the Past Due Status (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	$ 1,666,653	$ 1,629,700
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,219	1,162
30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	4,037	1,927
60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	35	735
≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	1,868	1,665
Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	5,940	4,327
Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	1,660,713	1,625,373
Commercial real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	930,109	898,709
Financing Receivable, 90 Days or More Past Due, Still Accruing	32	0
Commercial real estate | 30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	1,927	150
Commercial real estate | 60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	347
Commercial real estate | ≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	347	0
Commercial real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	2,274	497
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	927,835	898,212
Residential mortgage
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	391,864	394,189
Financing Receivable, 90 Days or More Past Due, Still Accruing	535	505
Residential mortgage | 30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	1,704	1,293
Residential mortgage | 60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	388
Residential mortgage | ≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	711	849
Residential mortgage | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	2,415	2,530
Residential mortgage | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	389,449	391,659
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	157,085	152,344
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial and industrial | 30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	52	50
Commercial and industrial | 60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	0
Commercial and industrial | ≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	158	159
Commercial and industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	210	209
Commercial and industrial | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	156,875	152,135
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	87,475	90,163
Financing Receivable, 90 Days or More Past Due, Still Accruing	652	654
Home equity lines of credit | 30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	257	414
Home equity lines of credit | 60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	23	0
Home equity lines of credit | ≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	652	654
Home equity lines of credit | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	932	1,068
Home equity lines of credit | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	86,543	89,095
Real estate construction
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	90,331	84,341
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Real estate construction | 30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	97	12
Real estate construction | 60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	12	0
Real estate construction | ≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	0
Real estate construction | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	109	12
Real estate construction | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	90,222	84,329
Consumer
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	9,789	9,954
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	3
Consumer | 30–59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	8
Consumer | 60–89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	0
Consumer | ≥ 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	3
Consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	0	11
Consumer | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, before allowance for credit loss	$ 9,789	$ 9,943

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Schedule of Nonaccrual Loans by Classes of the Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Total nonaccrual loans	$ 2,716	$ 3,011
With a Related Allowance	1,252	1,319
Without a Related Allowance	1,464	1,692
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,219	1,162
Financing Receivable, Nonperforming Loans	3,935	4,173
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total nonaccrual loans	1,422	1,479
With a Related Allowance	315	315
Without a Related Allowance	1,107	1,164
Financing Receivable, 90 Days or More Past Due, Still Accruing	32	0
Residential mortgage
Financing Receivable, Past Due [Line Items]
Total nonaccrual loans	176	343
With a Related Allowance	0	0
Without a Related Allowance	176	343
Financing Receivable, 90 Days or More Past Due, Still Accruing	535	505
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total nonaccrual loans	937	1,004
With a Related Allowance	937	1,004
Without a Related Allowance	0	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Total nonaccrual loans	181	185
With a Related Allowance	0	0
Without a Related Allowance	181	185
Financing Receivable, 90 Days or More Past Due, Still Accruing	652	654
Real estate construction
Financing Receivable, Past Due [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 0	$ 0

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process	$ 1.3	$ 1.3

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Summary of Amortized Cost Basis of Individually Evaluated Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Business Assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	$ 937	$ 1,004
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	1,779	2,007
Commercial real estate | Business Assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	0	0
Commercial real estate | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	1,422	1,479
Residential mortgage | Business Assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	0	0
Residential mortgage | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	176	343
Commercial and industrial | Business Assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	937	1,004
Commercial and industrial | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	0	0
Home equity lines of credit | Business Assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	0	0
Home equity lines of credit | Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Individually Evaluated for Impairment	$ 181	$ 185

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Modifications (Details) - Commercial and industrial - Extended Maturity $ in Thousands	Mar. 31, 2024 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified	0
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified	292
30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified	0
≥ 90 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans modified	0

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Schedule of Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating and Performance Status (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 57,705		$ 252,168
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	259,629		300,562
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	299,881		233,941
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	227,669		113,922
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	109,727		109,765
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	568,505		479,125
Financing Receivable, Revolving	143,537		140,217
Financing receivable, before allowance for credit loss	1,666,653		1,629,700
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0		48
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0		83
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	5		42
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0		55
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0		23
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0		188
Financing Receivable, Revolving, Writeoff	55		67
Financing Receivable, Allowance for Credit Loss, Writeoff	60	$ 117	506
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	53,219		207,689
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	212,328		244,495
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	246,483		210,808
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	204,809		92,450
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	88,699		90,270
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	411,433		334,815
Financing Receivable, Revolving	57,853		52,423
Financing receivable, before allowance for credit loss	1,274,824		1,232,950
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	37		2,643
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,711		7,235
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,920		6,803
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	7,277		2,922
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,089		9,188
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	28,042		19,885
Financing Receivable, Revolving	4,162		4,797
Financing receivable, before allowance for credit loss	51,238		53,473
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		7
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	432		135
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	109		499
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	472		1,621
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,534		713
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9,037		8,770
Financing Receivable, Revolving	2,842		2,272
Financing receivable, before allowance for credit loss	14,426		14,017
Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,449		41,829
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	44,158		48,697
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	47,369		15,831
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,111		16,929
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	16,405		9,594
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	119,457		114,715
Financing Receivable, Revolving	78,029		80,160
Financing receivable, before allowance for credit loss	324,978		327,755
Nonperforming Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	536		940
Financing Receivable, Revolving	651		565
Financing receivable, before allowance for credit loss	1,187		1,505
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	930,109		898,709
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Commercial real estate | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	45,462		138,085
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	137,824		159,152
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	159,410		136,914
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	135,455		64,352
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	62,363		74,782
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	374,207		309,794
Financing Receivable, Revolving	15,388		15,630
Financing receivable, before allowance for credit loss	930,109		898,709
Commercial real estate | Pass | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	45,462		136,158
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	135,864		152,767
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	154,328		130,994
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	129,033		60,918
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	58,625		65,856
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	343,722		287,026
Financing Receivable, Revolving	13,858		13,636
Financing receivable, before allowance for credit loss	880,892		847,355
Commercial real estate | Special Mention | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		1,927
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,960		6,385
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,082		5,920
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,422		1,904
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,220		8,222
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	23,578		16,244
Financing Receivable, Revolving	1,530		1,994
Financing receivable, before allowance for credit loss	40,792		42,596
Commercial real estate | Substandard | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		1,530
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,518		704
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,907		6,524
Financing Receivable, Revolving	0		0
Financing receivable, before allowance for credit loss	8,425		8,758
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	391,864		394,189
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Residential mortgage | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,161		39,734
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	39,809		27,694
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	25,312		41,624
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	40,636		15,155
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,962		11,318
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	39,305		29,949
Financing Receivable, Revolving	417		464
Financing receivable, before allowance for credit loss	164,602		165,938
Residential mortgage | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,376		33,884
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	36,651		45,221
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	44,113		14,878
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	14,262		16,184
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15,728		9,059
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	114,061		108,869
Financing Receivable, Revolving	71		156
Financing receivable, before allowance for credit loss	227,262		228,251
Residential mortgage | Pass | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,161		39,146
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	39,225		27,612
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	25,230		41,031
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	40,049		14,758
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,573		10,492
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	35,849		27,274
Financing Receivable, Revolving	339		402
Financing receivable, before allowance for credit loss	159,426		160,715
Residential mortgage | Special Mention | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		588
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	584		82
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	82		593
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	587		397
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	389		826
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,211		2,457
Financing Receivable, Revolving	78		62
Financing receivable, before allowance for credit loss	4,931		5,005
Residential mortgage | Substandard | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	245		218
Financing Receivable, Revolving	0		0
Financing receivable, before allowance for credit loss	245		218
Residential mortgage | Performing Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,376		33,884
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	36,651		45,221
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	44,113		14,878
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	14,262		16,184
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15,728		9,059
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	113,526		108,021
Financing Receivable, Revolving	71		156
Financing receivable, before allowance for credit loss	226,727		227,403
Residential mortgage | Nonperforming Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	535		848
Financing Receivable, Revolving	0		0
Financing receivable, before allowance for credit loss	535		848
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	157,085		152,344
Financing Receivable, Allowance for Credit Loss, Writeoff	0	29
Commercial and industrial | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,323		12,454
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	12,443		24,697
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	23,573		35,619
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	34,114		16,234
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15,668		14,071
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	32,589		19,836
Financing Receivable, Revolving	36,375		29,433
Financing receivable, before allowance for credit loss	157,085		152,344
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff			0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff			0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff			110
Financing Receivable, Revolving, Writeoff			0
Financing Receivable, Allowance for Credit Loss, Writeoff			110
Commercial and industrial | Pass | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,286		12,319
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	11,844		24,259
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	23,167		34,830
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	33,374		15,614
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15,172		13,922
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	30,579		17,780
Financing Receivable, Revolving	31,721		25,147
Financing receivable, before allowance for credit loss	148,143		143,871
Commercial and industrial | Special Mention | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	37		128
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	167		303
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	297		290
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	268		529
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	480		140
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	547		459
Financing Receivable, Revolving	1,812		2,014
Financing receivable, before allowance for credit loss	3,608		3,863
Commercial and industrial | Substandard | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		7
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	432		135
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	109		499
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	472		91
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	16		9
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,463		1,597
Financing Receivable, Revolving	2,842		2,272
Financing receivable, before allowance for credit loss	5,334		4,610
Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	87,475		90,163
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Home equity lines of credit | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		300
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	299		99
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	97		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	483		493
Financing Receivable, Revolving	6,574		5,962
Financing receivable, before allowance for credit loss	7,453		6,854
Home equity lines of credit | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		23
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	22		38
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	37		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		13
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13		94
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,747		4,834
Financing Receivable, Revolving	76,203		78,307
Financing receivable, before allowance for credit loss	80,022		83,309
Home equity lines of credit | Pass | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		300
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	299		99
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	97		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	128		131
Financing Receivable, Revolving	5,832		5,235
Financing receivable, before allowance for credit loss	6,356		5,765
Home equity lines of credit | Special Mention | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0		0
Financing Receivable, Revolving	742		727
Financing receivable, before allowance for credit loss	742		727
Home equity lines of credit | Substandard | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	355		362
Financing Receivable, Revolving	0		0
Financing receivable, before allowance for credit loss	355		362
Home equity lines of credit | Performing Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		23
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	22		38
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	37		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		13
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	13		94
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,746		4,742
Financing Receivable, Revolving	75,552		77,745
Financing receivable, before allowance for credit loss	79,370		82,655
Home equity lines of credit | Nonperforming Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1		92
Financing Receivable, Revolving	651		562
Financing receivable, before allowance for credit loss	652		654
Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	90,331		84,341
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Real estate construction | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,310		19,766
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25,096		40,223
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	44,120		3,953
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,353		1,252
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	329		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,928		3,398
Financing Receivable, Revolving	6,103		8,003
Financing receivable, before allowance for credit loss	81,239		76,595
Real estate construction | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,561		5,571
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,400		753
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	748		175
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	172		210
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	204		170
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,005		867
Financing Receivable, Revolving	2		0
Financing receivable, before allowance for credit loss	9,092		7,746
Real estate construction | Pass | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,310		19,766
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25,096		39,758
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	43,661		3,953
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,353		1,160
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	329		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,155		2,604
Financing Receivable, Revolving	6,103		8,003
Financing receivable, before allowance for credit loss	80,007		75,244
Real estate construction | Special Mention | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		465
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	459		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		92
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	706		725
Financing Receivable, Revolving	0		0
Financing receivable, before allowance for credit loss	1,165		1,282
Real estate construction | Substandard | Internally Risk Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	67		69
Financing Receivable, Revolving	0		0
Financing receivable, before allowance for credit loss	67		69
Real estate construction | Performing Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,561		5,571
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,400		753
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	748		175
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	172		210
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	204		170
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,005		867
Financing Receivable, Revolving	2		0
Financing receivable, before allowance for credit loss	9,092		7,746
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	9,789		9,954
Financing Receivable, Allowance for Credit Loss, Writeoff	60	$ 88
Consumer | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	512		2,351
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,085		2,685
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,471		778
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	677		522
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	460		271
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,180		1,085
Financing Receivable, Revolving	2,404		2,262
Financing receivable, before allowance for credit loss	9,789		9,954
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0		48
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0		83
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	5		42
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0		55
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0		23
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0		78
Financing Receivable, Revolving, Writeoff	55		67
Financing Receivable, Allowance for Credit Loss, Writeoff	60		396
Consumer | Performing Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	512		2,351
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,085		2,685
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,471		778
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	677		522
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	460		271
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,180		1,085
Financing Receivable, Revolving	2,404		2,259
Financing receivable, before allowance for credit loss	$ 9,789		9,951
Consumer | Nonperforming Loans | Performance Rated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year			0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year			0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year			0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year			0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year			0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year			0
Financing Receivable, Revolving			3
Financing receivable, before allowance for credit loss			$ 3

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Schedule of Allowance for Credit Losses and Recorded Investment in Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	$ 19,969	$ 17,861	$ 17,861
Charge-offs	(60)	(117)	(506)
Recoveries	40	26
Allowance for Credit Losses, Ending balance	20,172	19,485	19,969
Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	223	97
Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		1,618
Commercial Real Estate
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	12,010	10,016	10,016
Charge-offs	0	0
Recoveries	0	0
Allowance for Credit Losses, Ending balance	12,240	11,032	12,010
Commercial Real Estate | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	230	(90)
Commercial Real Estate | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		1,106
Residential Mortgage
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	3,303	3,029	3,029
Charge-offs	0	0
Recoveries	0	0
Allowance for Credit Losses, Ending balance	3,227	3,366	3,303
Residential Mortgage | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	(76)	40
Residential Mortgage | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		297
Commercial and Industrial
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	2,048	2,848	2,848
Charge-offs	0	(29)
Recoveries	15	1
Allowance for Credit Losses, Ending balance	1,960	2,105	2,048
Commercial and Industrial | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	(103)	47
Commercial and Industrial | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		(762)
Home Equity Lines of Credit
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	397	347	347
Charge-offs	0	0
Recoveries	0	0
Allowance for Credit Losses, Ending balance	314	379	397
Home Equity Lines of Credit | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	(83)	15
Home Equity Lines of Credit | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		17
Real Estate Construction
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	2,070	1,000	1,000
Charge-offs	0	0
Recoveries	0	0
Allowance for Credit Losses, Ending balance	2,313	2,465	2,070
Real Estate Construction | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	243	118
Real Estate Construction | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		1,347
Consumer
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	141	376	376
Charge-offs	(60)	(88)
Recoveries	25	25
Allowance for Credit Losses, Ending balance	118	138	141
Consumer | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	12	(33)
Consumer | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		(142)
Unallocated
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Beginning balance	0	245	245
Charge-offs	0	0
Recoveries	0	0
Allowance for Credit Losses, Ending balance	0	0	$ 0
Unallocated | Financing Receivable Excluding Unfunded Commitments
Allowance for Loan Losses [Roll Forward]
Provisions (credits)	$ 0	0
Unallocated | Impact of CECL adoption
Allowance for Loan Losses [Roll Forward]
Allowance for Credit Losses, Ending balance		$ (245)

Deposits - Composition of Depos

Deposits - Composition of Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
Noninterest-bearing demand deposits	$ 499,583	$ 500,332
Interest-bearing demand deposits	493,783	524,289
Money market	252,363	264,907
Savings	332,213	340,134
Total demand and savings	1,577,942	1,629,662
Time	257,282	232,151
Total deposits	$ 1,835,224	$ 1,861,813

Deposits - Time Deposit Maturit

Deposits - Time Deposit Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposit Liability [Line Items]
Time	$ 257,282	$ 232,151
Less than $250,000
Deposit Liability [Line Items]
Less than 1 year	176,531
1 through 2 years	20,264
2 through 3 years	6,231
3 through 4 years	3,946
4 through 5 years	1,874
Thereafter	12
Time	208,858
$250,000 or more
Deposit Liability [Line Items]
Less than 1 year	46,675
1 through 2 years	1,495
2 through 3 years	254
3 through 4 years	0
4 through 5 years	0
Thereafter	0
Time	$ 48,424

Borrowings - Schedule of Short-

Borrowings - Schedule of Short-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Short-Term Debt [Line Items]
Short-term borrowings	$ 17,303	$ 56,882
Securities sold under agreements to repurchase
Short-Term Debt [Line Items]
Short-term borrowings	17,303	26,882
FHLB Advances
Short-Term Debt [Line Items]
Short-term borrowings	$ 0	$ 30,000

Borrowings - Narrative (Details

Borrowings - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 30, 2021	Mar. 31, 2024	Mar. 15, 2024
Debt Instrument [Line Items]
Bank par value		$ 10,600
Bank lines of credit		$ 192,000
Weighted average rate percentage		4.52%
Amount eligible to borrow from FHLB		$ 883,200
Amount available to borrow from FHLB		647,100
Subordinated debt
Debt Instrument [Line Items]
Subordinated debt issued	$ 15,000
Interest rate percentage	4%
Debt Instrument, issuance price, percentage	100%
Subordinated debt | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on prime rate, percentage	3.29%
Trust preferred subordinated debt, FCBI | Subordinated debt
Debt Instrument [Line Items]
Subordinated debt issued		$ 6,000
Trust preferred subordinated debt, FCBI | Subordinated debt | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on prime rate, percentage		1.63%
Interest rate percentage			7.22%

Borrowings - Schedule of Long-T

Borrowings - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Federal Home Loan Bank, Advance, Maturity, Year Two	$ 80,000
Federal Home Loan Bank, Advance, Maturity, Year Three	90,000	$ 80,000
Federal Home Loan Bank, Advance, Maturity, Year Four	35,000	60,000
Federal Home Loan Bank, Advance, Maturity, Year Five	30,000	35,000
Federal Home Loan Bank, Advance, Maturity, Year Six		0
Long-term debt outstanding	255,302	195,292
Subordinated debt
Debt Instrument [Line Items]
Long-term debt outstanding	15,000	15,000
Trust preferred subordinated debt, FCBI | Subordinated debt
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,302	$ 5,292

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	$ 425,114	$ 451,693
Equity securities with readily determinable fair values	918	928	$ 1,719
Loans held for sale	88	280
Foreclosed assets held for resale	467	467
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	918	928
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	425,114	451,693
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	155,821	156,795
Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	152,580	158,830
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	15,553	29,694
Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	61,654	65,290
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	918	928
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	425,114	451,693
Equity securities with readily determinable fair values	0	0
Loans held for sale	88	280
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 | 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	155,821	156,795
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 | Residential mortgage-backed securities | 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 | Residential mortgage-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	152,580	158,830
Recurring | Residential mortgage-backed securities | 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 | 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	15,553	29,694
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
Recurring | Commercial mortgage-backed securities | 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 | Commercial mortgage-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	61,654	65,290
Recurring | Commercial mortgage-backed securities | 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 | Collateralized Mortgage Obligations | 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 | Collateralized Mortgage Obligations | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	39,506	41,084
Recurring | Collateralized Mortgage Obligations | 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
Non-recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	0	0
Non-recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	0	0
Non-recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	467	467
Non-recurring | Individually evaluated loans | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Non-recurring | Individually evaluated loans | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Non-recurring | Individually evaluated loans | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	294	242
Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	425,114	451,693
Equity securities with readily determinable fair values	918	928
Total | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	425,114	451,693
Equity securities with readily determinable fair values	918	928
Loans held for sale	88	280
Total | Recurring | 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	155,821	156,795
Total | Recurring | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	152,580	158,830
Total | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	15,553	29,694
Total | Recurring | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	61,654	65,290
Total | Recurring | Collateralized Mortgage Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available for sale, at estimated fair value	39,506	41,084
Total | Non-recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held for resale	467	467
Total | Non-recurring | Individually evaluated loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 294	$ 242

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Additional Quantitative Information (Details) - Non-recurring - Level 3 $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Individually evaluated loans
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 294	$ 242
Foreclosed assets held for resale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 467	$ 467
Measurement Input, Discount Rate | Individually evaluated loans
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted Average	0.93	0.94
Measurement Input, Discount Rate | Individually evaluated loans | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted Average	0.33	0.33
Measurement Input, Discount Rate | Individually evaluated loans | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted Average	1	1
Measurement Input, Discount Rate | Foreclosed assets held for resale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Weighted Average	0.56	0.56

Fair Value Measurements - Sch_3

Fair Value Measurements - Schedule of Carrying Amount, Fair Value and Placement in Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financial assets:
Interest-bearing deposits with banks	$ 35,740	$ 44,516
Equity securities with readily determinable fair values	918	928	$ 1,719
Investment securities AFS	425,114	451,693
Securities held to maturity, fair value	58,084	59,057
Restricted investment in bank stocks	10,877	9,677
Level 1
Financial assets:
Cash and due from banks	17,395	7,063
Interest-bearing deposits with banks	35,740	44,516
Equity securities with readily determinable fair values	918	928
Investment securities AFS	0	0
Securities held to maturity, fair value	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	0
Trust preferred and subordinated debt	0	0
Accrued interest payable	0	0
Level 2
Financial assets:
Cash and due from banks	0	14,379
Interest-bearing deposits with banks	0	0
Equity securities with readily determinable fair values	0	0
Investment securities AFS	425,114	451,693
Securities held to maturity, fair value	58,084	59,057
Loans held for sale	88	280
Loans, net	0	0
Accrued interest receivable	8,140	8,080
Restricted investment in bank stocks	10,877	9,677
Financial liabilities:
Demand deposits, savings, and money markets	1,323,123	1,391,709
Time deposits	246,272	221,770
Securities sold under repurchase agreements	18,106	23,666
FHLB Advances	235,588	206,950
Trust preferred and subordinated debt	18,277	16,992
Accrued interest payable	1,476	794
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 AFS	0	0
Securities held to maturity, fair value	0	0
Loans held for sale	0	0
Loans, net	1,588,788	1,562,703
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	0
Trust preferred and subordinated debt	0	0
Accrued interest payable	0	0
Carrying Amount
Financial assets:
Cash and due from banks	17,395	21,442
Interest-bearing deposits with banks	35,740	44,516
Equity securities with readily determinable fair values	918	928
Investment securities AFS	425,114	451,693
Securities held to maturity, fair value	64,594	64,600
Loans held for sale	88	280
Loans, net	1,644,808	1,608,019
Accrued interest receivable	8,140	8,080
Restricted investment in bank stocks	10,877	9,677
Financial liabilities:
Demand deposits, savings, and money markets	1,577,942	1,629,662
Time deposits	257,282	232,151
Securities sold under repurchase agreements	17,303	26,882
FHLB Advances	235,000	205,000
Trust preferred and subordinated debt	20,302	20,292
Accrued interest payable	1,476	794
Total
Financial assets:
Cash and due from banks	17,395	21,442
Interest-bearing deposits with banks	35,740	44,516
Equity securities with readily determinable fair values	918	928
Investment securities AFS	425,114	451,693
Securities held to maturity, fair value	58,084	59,057
Loans held for sale	88	280
Loans, net	1,588,788	1,562,703
Accrued interest receivable	8,140	8,080
Restricted investment in bank stocks	10,877	9,677
Financial liabilities:
Demand deposits, savings, and money markets	1,323,123	1,391,709
Time deposits	246,272	221,770
Securities sold under repurchase agreements	18,106	23,666
FHLB Advances	235,588	206,950
Trust preferred and subordinated debt	18,277	16,992
Accrued interest payable	$ 1,476	$ 794

Retirement Benefits (Details)

Retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Postemployment Benefits [Abstract]
Service cost	$ 107	$ 124
Interest cost	374	373
Expected return on plan assets	(712)	(663)
Amortization of net loss	19	98
Net Periodic Benefit Income	$ (212)	$ (68)

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
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]
Off-balance sheet financial instruments	391,241	$ 403,300
Standby Letters of Credit
Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments	$ 17,886	$ 21,029

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 277,461	$ 245,042
Unrealized gain (loss) on AFS securities, net of tax	(2,198)	5,136
Realized (losses) gains on securities, net of tax	53	(146)
Amortization of unrealized losses on securities transferred to HTM, net of tax	215	1,014
Amortization of pension net loss, transition liability and prior service cost, net of tax	15	48
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME	(1,915)	6,052
Ending balance	279,920	255,841
Unrealized (Losses) Gains on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(40,952)	(52,734)
Unrealized gain (loss) on AFS securities, net of tax	(2,198)	5,136
Realized (losses) gains on securities, net of tax	53	(146)
Amortization of unrealized losses on securities transferred to HTM, net of tax	215	1,014
Amortization of pension net loss, transition liability and prior service cost, net of tax	0	0
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME	(1,930)	6,004
Ending balance	(42,882)	(46,730)
Pension Liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(3,957)	(5,278)
Unrealized gain (loss) on AFS securities, net of tax	0	0
Realized (losses) gains on securities, net of tax	0	0
Amortization of unrealized losses on securities transferred to HTM, net of tax	0	0
Amortization of pension net loss, transition liability and prior service cost, net of tax	15	48
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME	15	48
Ending balance	(3,942)	(5,230)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(44,909)	(58,012)
Unrealized gain (loss) on AFS securities, net of tax	(2,198)	5,136
Realized (losses) gains on securities, net of tax	53	(146)
Amortization of unrealized losses on securities transferred to HTM, net of tax	215	1,014
Amortization of pension net loss, transition liability and prior service cost, net of tax	15	48
TOTAL OTHER COMPREHENSIVE (LOSS) INCOME	(1,915)	6,052
Ending balance	$ (46,824)	$ (51,960)

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of reporting segments | segment	2
Segment Reporting Information [Line Items]
Interest income and other income from external customers	$ 31,641	$ 28,893
Interest expense	5,381	817
Depreciation and amortization	766	883
Income before income taxes	8,526	11,421
Total assets	2,414,288	2,410,933	$ 2,418,847
Goodwill	44,185	44,185	$ 44,185
Capital expenditures	78	58
Banking
Segment Reporting Information [Line Items]
Interest income and other income from external customers	29,526	26,991
Interest expense	5,381	817
Depreciation and amortization	566	673
Income before income taxes	8,454	11,292
Total assets	2,392,392	2,391,583
Goodwill	35,800	35,800
Capital expenditures	78	52
Insurance
Segment Reporting Information [Line Items]
Interest income and other income from external customers	2,115	1,902
Interest expense	0	0
Depreciation and amortization	200	210
Income before income taxes	72	129
Total assets	21,896	19,350
Goodwill	8,385	8,385
Capital expenditures	$ 0	$ 6