Arrow Financial (AROW) 10-Q 10 May 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	Apr. 30, 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	0-12507
Entity Registrant Name	ARROW FINANCIAL CORPORATION
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	22-2448962
Entity Address, Address Line One	250 Glen Street
Entity Address, City or Town	Glens Falls
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	12801
City Area Code	518
Local Phone Number	745-1000
Title of 12(b) Security	Common Stock, Par Value $1.00 per share
Trading Symbol	AROW
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		16,698,141
Entity Central Index Key	0000717538
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
ASSETS
Cash and Due From Banks	$ 27,356	$ 36,755	$ 25,107
Interest-Bearing Deposits at Banks	255,109	105,781	178,365
Investment Securities:
Available-for-Sale at Fair Value	485,833	497,769	565,693
Held-to-Maturity (Fair Value of $124,861 at March 31, 2024; $128,837 at December 31, 2023; and $164,439 at March 31, 2023)	128,051	131,395	167,347
Equity Securities	1,942	1,925	2,070
Other Investments	4,208	5,049	10,027
Loans	3,258,758	3,212,908	3,005,352
Allowance for Credit Losses	(31,561)	(31,265)	(30,784)
Net Loans	3,227,197	3,181,643	2,974,568
Premises and Equipment, Net	59,494	59,642	58,233
Goodwill	21,873	21,873	21,873
Other Intangible Assets, Net	1,018	1,110	1,400
Other Assets	121,542	126,926	109,947
Total Assets	4,333,623	4,169,868	4,114,630
LIABILITIES
Noninterest-Bearing Deposits	696,519	758,425	788,690
Interest-Bearing Checking Accounts	908,453	799,785	958,490
Savings Deposits	1,497,466	1,466,280	1,497,326
Time Deposits over $250,000	173,976	179,301	122,827
Other Time Deposits	502,607	483,775	179,016
Total Deposits	3,779,021	3,687,566	3,546,349
Borrowings	106,500	26,500	142,800
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Finance Leases	5,053	5,066	5,106
Other Liabilities	45,063	50,964	37,004
Total Liabilities	3,955,637	3,790,096	3,751,259
STOCKHOLDERS’ EQUITY
Preferred Stock, $1 Par Value and 1,000,000 Shares Authorized at March 31, 2024, December 31, 2023 and March 31, 2023	0	0	0
Common Stock, $1 Par Value; 30,000,000 Shares Authorized (22,066,559 Shares Issued at March 31, 2024 and December 31, 2023 and 21,423,992 Shares Issued at March 31, 2023)	22,067	22,067	21,424
Additional Paid-in Capital	412,823	412,551	400,944
Retained Earnings	68,887	65,792	69,499
Accumulated Other Comprehensive Loss	(32,714)	(33,416)	(43,983)
Treasury Stock, at Cost (5,356,335 Shares at March 31, 2024; 5,124,073 Shares at December 31, 2023 and 4,870,935 Shares at March 31, 2023)	(93,077)	(87,222)	(84,513)
Total Stockholders’ Equity	377,986	379,772	363,371
Total Liabilities and Stockholders’ Equity	$ 4,333,623	$ 4,169,868	$ 4,114,630

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity securities, at fair value	$ 124,861	$ 128,837	$ 164,439
STOCKHOLDERS’ EQUITY
Preferred Stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Preferred Stock, shares authorized (in shares)	1,000,000	1,000,000	1,000,000
Common Stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Common Stock, shares authorized (in shares)	30,000,000	30,000,000	30,000,000
Common Stock, shares issued (in shares)	22,066,559	21,423,992	21,423,992
Treasury Stock (in shares)	5,356,335	5,124,073	4,870,935

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
INTEREST AND DIVIDEND INCOME
Interest and Fees on Loans		$ 40,376	$ 31,886
Interest on Deposits at Banks		2,447	479
Interest and Dividends on Investment Securities:
Fully Taxable		3,186	2,948
Exempt from Federal Taxes		668	797
Total Interest and Dividend Income		46,677	36,110
INTEREST EXPENSE
Interest-Bearing Checking Accounts		1,641	370
Savings Deposits		10,230	5,587
Time Deposits over $250,000		1,973	574
Other Time Deposits		5,083	474
Borrowings		1,076	793
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts		171	169
Interest on Financing Leases		48	49
Total Interest Expense		20,222	8,016
NET INTEREST INCOME		26,455	28,094
Provision for Credit Losses		617	1,554
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES		25,838	26,540
NON-INTEREST INCOME
Insurance Commissions		1,682	1,520
Net Gain (Loss) on Securities		17	(104)
Net Gain on Sales of Loans		4	4
Other Operating Income		1,155	387
Total Non-Interest Income		7,858	6,677
NON-INTEREST EXPENSE
Salaries and Employee Benefits		12,893	11,947
Occupancy Expenses, Net		1,771	1,628
Technology and Equipment Expense		4,820	4,417
FDIC Assessments		715	479
Other Operating Expense		3,813	3,825
Total Non-Interest Expense		24,012	22,296
INCOME BEFORE PROVISION FOR INCOME TAXES		9,684	10,921
Provision for Income Taxes		2,024	2,359
NET INCOME		$ 7,660	$ 8,562
Average Shares Outstanding:
Basic (in shares)	[1]	16,865	17,048
Diluted (in shares)	[1]	16,867	17,060
Per Common Share:
Basic Earnings (in dollars per share)		$ 0.45	$ 0.50
Diluted Earnings (in dollars per share)		$ 0.45	$ 0.50
Income From Fiduciary Activities
NON-INTEREST INCOME
Revenue from contract with customer		$ 2,457	$ 2,275
Fees for Other Services to Customers
NON-INTEREST INCOME
Revenue from contract with customer		$ 2,543	$ 2,595
[1] 2023 Share and Per Share Amounts have been restated for the September 26, 2023 3% stock dividend.

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical)	Sep. 26, 2023
Income Statement [Abstract]
Stock dividend (in percent)	3%

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 7,660	$ 8,562
Other Comprehensive (Loss) Income, Net of Tax:
Net Unrealized Securities Holding (Loss) Gain Arising During the Period	(1,530)	6,099
Net Unrealized Gain (Loss) on Cash Flow Hedge Agreements	2,390	(593)
Reclassification of Net Unrealized (Gain) Loss on Cash Flow Hedge Agreements to Interest Expense	(158)	147
Amortization of Net Retirement Plan Actuarial Gain	(50)	(18)
Amortization of Net Retirement Plan Prior Service Cost	50	37
Other Comprehensive Income	702	5,672
Comprehensive Income	$ 8,362	$ 14,234

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2022		$ 353,538	$ 21,424	$ 400,270	$ 65,401	$ (49,655)	$ (83,902)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		8,562			8,562
Other Comprehensive Income		5,672				5,672
Cash Dividends Paid	[1]	(4,464)			(4,464)
Stock Options Exercised, Net		83		50			33
Shares Issued Under the Directors' Stock Plan		114		85			29
Shares Issued Under the Employee Stock Purchase Plan		120		87			33
Shares Issued for Dividend Reinvestment Plans		472		330			142
Stock-Based Compensation Expense		122		122
Purchases of Treasury Stock		(848)					(848)
Ending balance at Mar. 31, 2023		363,371	21,424	400,944	69,499	(43,983)	(84,513)
Beginning balance at Dec. 31, 2023		379,772	22,067	412,551	65,792	(33,416)	(87,222)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		7,660			7,660
Other Comprehensive Income		702				702
Cash Dividends Paid		(4,565)			(4,565)
Stock Options Exercised, Net		116		67			49
Shares Issued Under the Directors' Stock Plan		128		89			39
Shares Issued Under the Employee Stock Purchase Plan		51		33			18
Compensation expense related to Employee Stock purchase Plan		5		5
Stock-Based Compensation Expense		78		78
Purchases of Treasury Stock		(5,961)					(5,961)
Ending balance at Mar. 31, 2024		$ 377,986	$ 22,067	$ 412,823	$ 68,887	$ (32,714)	$ (93,077)
[1]Cash dividends paid per share have been adjusted for the September 26, 2023 3% stock dividend.

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Cash Dividends Paid, per Share (in dollars per share)	$ 0.27	$ 0.262
Stock Options Exercised (in shares)	6,060	3,772
Shares Issued Under the Directors' Stock Plan (in shares)	4,887	3,418
Shares Issued Under Employee Stock Purchase Plan (in shares)	2,271	3,872
Shares Issued for Dividend Reinvestment Plans (in shares)		17,753
Purchase of Treasury Stock (in shares)	245,480	27,395

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net Income	$ 7,660	$ 8,562
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	617	1,554
Depreciation and Amortization	1,394	1,738
Net (Gain) Loss on Securities Transactions	(17)	104
Loans Originated and Held-for-Sale	(50)	239
Proceeds from the Sale of Loans Held-for-Sale	4	4
Net Gain on the Sale of Loans	(4)	(4)
Net Loss on the Sale of Premises and Equipment, Other Real Estate Owned and Repossessed Assets	27	37
Contributions to Retirement Benefit Plans	(154)	(143)
Deferred Income Tax (Benefit) Expense	(259)	891
Shares Issued Under the Directors’ Stock Plan	128	114
Stock-Based Compensation Expense	83	122
Tax Benefit from Exercise of Stock Options	6	11
Net Decrease in Other Assets	(269)	1,792
Net Decrease in Other Liabilities	1,183	(1,801)
Net Cash Provided By Operating Activities	10,349	13,220
Cash Flows from Investing Activities:
Proceeds from the Maturities and Calls of Securities Available-for-Sale	10,083	15,669
Proceeds from the Maturities and Calls of Securities Held-to-Maturity	4,003	9,328
Purchases of Securities Held-to-Maturity	(750)	(1,448)
Net Increase in Loans	(51,352)	(23,479)
Proceeds from the Sales of Premises and Equipment, Other Real Estate Owned and Repossessed Assets	637	785
Purchase of Premises and Equipment	(1,155)	(2,635)
Net Decrease (Increase) in FHLB and Federal Reserve Bank Stock	841	(3,963)
Net Cash Used By Investing Activities	(37,693)	(5,743)
Cash Flows from Financing Activities:
Net Increase in Deposits	91,455	47,985
Net (Decrease) Increase in Short-Term Federal Home Loan Bank Borrowings	(20,000)	8,000
Finance Lease Payments	(13)	(13)
Other Borrowings - Advances	100,000	100,000
Other Borrowings - Paydowns	0	(20,000)
Net Cash Collateral Received from Derivative Counterparties	6,190	0
Purchase of Treasury Stock	(5,961)	(848)
Stock Options Exercised, Net	116	83
Shares Issued Under the Employee Stock Purchase Plan	51	120
Shares Issued for Dividend Reinvestment Plans	0	472
Cash Dividends Paid	(4,565)	(4,464)
Net Cash Provided By Financing Activities	167,273	131,335
Net Increase in Cash and Cash Equivalents	139,929	138,812
Cash and Cash Equivalents at Beginning of Period	142,536	64,660
Cash and Cash Equivalents at End of Period	282,465	203,472
Supplemental Disclosures to Statements of Cash Flow Information:
Interest on Deposits and Borrowings	18,513	7,200
Income Taxes	953	1,069
Transfer of Loans to Other Real Estate Owned and Repossessed Assets	$ 624	$ 373

Risks and Uncertainties

Risks and Uncertainties	3 Months Ended
	Mar. 31, 2024
Risks and Uncertainties [Abstract]
Risks and Uncertainties	RISKS AND UNCERTAINTIES Nature of Operations - Arrow Financial Corporation, a New York corporation ("Arrow," the "Company," "we," or "us"), was incorporated on March 21, 1983 and is registered as a bank holding company within the meaning of the Bank Holding Company Act of 1956. The banking subsidiaries are Glens Falls National Bank and Trust Company ("GFNB") whose main office is located in Glens Falls, New York, and Saratoga National Bank and Trust Company ("SNB") whose main office is located in Saratoga Springs, New York. The two subsidiary banks provide a full range of services to individuals and small to mid-size businesses in northeastern New York State from Albany, the State's capitol, to the Canadian border. Both banks have wealth management departments which provide investment management and administrative services. An active subsidiary of GFNB is Upstate Agency LLC, offering insurance services including property and casualty insurance, group health insurance and individual life insurance products. North Country Investment Advisers, Inc., a registered investment adviser that provides investment advice to our proprietary mutual fund, and Arrow Properties, Inc., a real estate investment trust (REIT), are subsidiaries of GFNB. Arrow also owns directly two subsidiary business trusts, organized in 2003 and 2004 to issue trust preferred securities (TRUPs), which are still outstanding. Concentrations of Credit - With the exception of some indirect auto lending, Arrow's loans are primarily with borrowers in upstate New York. Although the loan portfolios of the subsidiary banks are well diversified, tourism has a substantial impact on the northeastern New York economy. The commitments to extend credit are fairly consistent with the distribution of loans presented in Note 5, " Loans, " generally have the same credit risk and are subject to normal credit policies. Generally, the loans are secured by assets and are expected to be repaid from cash flow or the sale of selected assets of the borrowers. Arrow evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by Arrow upon extension of credit, is based upon Management's credit evaluation of the counterparty. The nature of the collateral varies with the type of loan and may include: residential real estate, cash and securities, inventory, accounts receivable, property, plant and equipment, income producing commercial properties and automobiles. Liquidity - The objective of effective liquidity management is to ensure that Arrow has the ability to raise cash when needed at a reasonable cost. This includes the capability of meeting expected and unexpected obligations to Arrow's customers at any time. Given the uncertain nature of customer demands and the need to maximize earnings, Arrow must have available reasonably priced sources of funds, both on- and off-balance sheet, that can be accessed quickly in times of need. Arrow’s liquidity position should provide the Company with the necessary flexibility to address any unexpected near-term disruptions such as reduced cash flows from the investment and loan portfolio, unexpected deposit runoff, or increased loan originations. Arrow's primary sources of available liquidity are overnight investments in federal funds sold, interest bearing bank balances at the Federal Reserve Bank of New York ("FRBNY"), advances from the FRBNY Bank Term Funding Program ("BTFP") and cash flow from investment securities and loans.

Accounting Policies

Accounting Policies	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Accounting Policies	ACCOUNTING POLICIES In the opinion of the management of Arrow, the accompanying unaudited interim consolidated financial statements contain all of the adjustments necessary to present fairly the financial position as of March 31, 2024, December 31, 2023 and March 31, 2023; the results of operations for the three month periods ended March 31, 2024 and 2023; the consolidated statements of comprehensive income for the three month periods ended March 31, 2024 and 2023; the changes in stockholders' equity for the three month periods ended March 31, 2024 and 2023; and the cash flows for the three month periods ended March 31, 2024 and 2023. All such adjustments are of a normal recurring nature. The unaudited interim consolidated financial statements should be read in conjunction with the audited annual consolidated financial statements of Arrow for the year ended December 31, 2023 included in Arrow's Annual Report on Form 10-K for the year ended December 31, 2023 (the "2023 Form 10-K"). Management’s Use of Estimates The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of income and expenses during the reporting period. Management utilized estimates and assumptions in its evaluation of potential impairment of Arrow's right-of-use lease assets, goodwill and intangible assets. Our most significant estimate is the allowance for credit losses. Other estimates include the fair value of financial instruments, evaluation of pension and other post-retirement liabilities, an analysis of a need for a valuation allowance for deferred tax assets and a reserve for unfunded loan commitments recorded as an other liability. Actual results could differ from those estimates. A material estimate that is particularly susceptible to significant change in the near term is the allowance for credit losses. In connection with the determination of the allowance for credit losses management obtains economic forecasts from reliable sources and appraisals for properties. The allowance for credit losses is management’s best estimate of the life of loan losses as of the balance sheet date. While management uses available information to recognize losses on loans, future adjustments to the allowance for credit losses may be necessary based on changes in economic conditions. Allowance for Credit Losses – Loans - Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (CECL) approach requires an estimate of the credit losses expected over the life of a loan (or pool of loans). It replaces the incurred loss approach’s threshold that required the recognition of a credit loss when it was probable that a loss event was incurred. The allowance for credit losses is a valuation account that is deducted from, or added to, the loans’ amortized cost basis to present the net lifetime amount expected to be collected on the loans. Credit losses are charged off against the allowance when management believes a loan balance is confirmed to be uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged off and expected to be charged off. Management estimates the allowance using relevant available information from internal and external sources related to past events, current conditions, and a reasonable and supportable single economic forecast. Historical credit loss experience provides the basis for the estimation of expected credit losses. Arrow's historical loss experience was supplemented with peer information when there was insufficient loss data for Arrow. Peer selection was based on a review of institutions with comparable loss experience as well as loan yield, bank size, portfolio concentration and geography. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in credit concentrations, delinquency level, collateral values and underwriting standards as well as changes in economic conditions or other relevant factors. Management judgment is required at each point in the measurement process. Portfolio segment is defined as the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. Management developed portfolio segments for estimating loss based on type of borrower and collateral as follows: Commercial Loans Commercial Real Estate Loans Consumer Loans Residential Loans Further details related to loan portfolio segments is included in Note 5 Loans. Historical credit loss experience for both Arrow and segment-specific peers provides the basis for the estimation of expected credit losses. Arrow utilized regression analyses of peer data, of which Arrow is included, where observed credit losses and selected economic factors were utilized to determine suitable loss drivers for modeling lifetime probability of default (PD) rates. Arrow uses the discounted cash flow (DCF) method to estimate expected credit losses for the commercial, commercial real estate, and residential segments. For each of these loan segments, Arrow generates cash flow projections at the instrument level wherein payment expectations are adjusted for estimated prepayment speed, curtailments, time to recovery, PD, and segment-specific loss given default (LGD) risk factors. The modeling of expected prepayment speeds, curtailment rates, and time to recovery are based on historical internal data and adjusted, if necessary, based on the reasonable and supportable forecast of economic conditions. For the loan segments utilizing the DCF method, (commercial, commercial real estate, and residential) management utilizes externally developed economic forecast of the following economic factors as loss drivers: national unemployment, gross domestic product and Case-Shiller U.S. National Home Price Index ("HPI"). The economic forecast is applied over a reasonable and supportable forecast period. Arrow utilizes a six quarter reasonable and supportable forecast period with an eight quarter reversion to the historic mean on a straight-line basis. The combination of adjustments for credit expectations (default and loss) and timing expectations (prepayment, curtailment, and time to recovery) produces an expected cash flow stream at the instrument level. Instrument effective yield is calculated, net of the impacts of prepayment assumptions, and the instrument expected cash flows are then discounted at that effective yield to produce an instrument-level net present value of expected cash flows (NPV). An allowance for credit loss is established for the difference between the instrument’s NPV and amortized cost basis. Arrow uses the vintage analysis method to estimate expected credit losses for the consumer loan segment. The vintage method was selected since the loans within the consumer loan segment are homogeneous, not just by risk characteristic, but by loan structure. Under the vintage analysis method, a loss rate is calculated based on the quarterly net charge-offs to the outstanding loan balance for each vintage year over the lookback period. Once this periodic loss rate is calculated for each quarter in the lookback period, the periodic rates are averaged into the loss rate. The loss rate is then applied to the outstanding loan balances based on the loan's vintage year. Arrow maintains, over the life of the loan, the loss curve by vintage year. If estimated losses computed by the vintage method need to be adjusted based on current conditions and the reasonable and supportable economic forecast, these adjustments would be incorporated over a six quarter reasonable and supportable forecast period, reverting to historical losses using a straight-line method over an eight quarter period. Based on current conditions and the reasonable and supportable economic forecast, no adjustment to the loss rate for each vintage is currently required. The vintage and DCF models also consider the need to qualitatively adjust expected loss estimates for information not already captured in the quantitative loss estimation process. Qualitative considerations include limitations inherent in the quantitative model; trends experienced in nonperforming and delinquent loans; changes in value of underlying collateral; changes in lending policies and procedures; nature and composition of loans; portfolio concentrations that may affect loss experience across one or more components or the portfolio; the experience, ability and depth of lending management and staff; Arrow's credit review system; and the effect of external factors such as competition, legal and regulatory requirements. These qualitative factor adjustments may increase or decrease Arrow's estimate of expected credit losses so that the allowance for credit loss is reflective of the estimate of lifetime losses that exist in the loan portfolio at the balance sheet date. All loans not included in the vintage analysis method that exceed $250,000 which are on nonaccrual, are evaluated on an individual basis. For collateral dependent financial assets where Arrow has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and Arrow expects repayment of the financial asset to be provided substantially through the operation or sale of the collateral, Arrow has elected a practical expedient to measure the allowance for credit loss as the difference between the fair value of the collateral less cost to sell, and the amortized cost basis of the asset as of the measurement date. In the event the repayment of a collateral dependent financial asset is expected to be provided substantially through the operating of the collateral, Arrow will use fair value of the collateral at the reporting date when recording the net carrying amount of the asset and determining the allowance for credit losses. When repayment is expected to be from the sale of the collateral, expected credit losses are calculated as the amount by which the amortized cost basis of the financial asset exceeds the fair value of the underlying collateral less estimated cost to sell. The allowance for credit losses may be zero if the fair value of the collateral at the measurement date exceeds the amortized cost basis of the financial asset. As part of ASU No. 2022-02, Arrow evaluates whether the modification represents a new loan or a continuation of an existing loan, consistent with the current GAAP treatment for other loan modifications. In addition, Arrow evaluates and if necessary, discloses if loan modifications made to borrowers experiencing financial difficulty contain a financial concession. Estimated Credit Losses on Off-Balance Sheet Credit Exposures Recognized as Other Liabilities - Arrow estimates expected credit losses over the contractual period in which Arrow has exposure to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by Arrow. The allowance for credit losses on off-balance sheet credit exposures recognized in other liabilities, is adjusted as an expense in other non-interest expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over their estimated lives. Estimating credit losses on unfunded commitments requires Arrow to consider the following categories of off-balance sheet credit exposure: unfunded commitments to extend credit, unfunded lines of credit, and standby letters of credit. Each of these unfunded commitments is then analyzed for a probability of funding to calculate a probable funding amount. The life of loan loss factor by related portfolio segment from the loan allowance for credit loss calculation is then applied to the probable funding amount to calculate the estimated credit losses on off-balance sheet credit exposures recognized as other liabilities. Accrued Interest Receivable - Arrow has made the following elections regarding accrued interest receivable: (1) presented accrued interest receivable balances separately within the other assets balance sheet line item; (2) excluded interest receivable that is included in amortized cost of financing receivables from related disclosures requirements and (3) continued its policy to write off accrued interest receivable by reversing interest income. For loans, write off typically occurs upon becoming over 90 to 120 days past due and therefore the amount of such write offs are immaterial. Historically, Arrow has not experienced uncollectible accrued interest receivable on investment securities. Allowance for Credit Losses – Held-to-Maturity (HTM) Debt Securities - Arrow's HTM debt securities are also required to utilize the CECL approach to estimate expected credit losses. Management measures expected credit losses on HTM debt securities on a collective basis by major security types that share similar risk characteristics, such as financial asset type and collateral type adjusted for current conditions and reasonable and supportable forecasts. Management classifies the HTM portfolio into the following major security types: U.S. government agency or U.S. government sponsored mortgage-backed and collateralized mortgage obligations securities, and state and municipal debt securities. The mortgage-backed and collateralized mortgage obligations HTM securities are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government as to timely repayment of principal and interest, are highly rated by major rating agencies, and have a long history of no credit losses. Therefore, Arrow did not record a credit loss for these securities. State and municipal bonds carry an investment grade from an accredited ratings agency, primarily with an investment grade rating. In addition, Arrow has a limited amount of New York state local municipal bonds that are not rated. The estimate of expected credit losses on the HTM portfolio is based on the expected cash flows of each individual CUSIP over its contractual life and utilized a municipal loss forecast model for determining PD and LGD rates. Management may exercise discretion to make adjustments based on environmental factors. A calculated expected credit loss for individual securities was determined using the PD and LGD rates. Arrow determined that the expected credit loss on its municipal bond portfolio was de minimis, and therefore, an allowance for credit losses was not recorded. Allowance for Credit Losses – Available-for-Sale (AFS) Debt Securities - The impairment model for AFS debt securities differs from the CECL approach utilized by HTM debt securities since AFS debt securities are measured at fair value rather than amortized cost. For AFS debt securities in an unrealized loss position, Arrow first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, in making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, adverse conditions specifically related to the security, failure of the issuer of the debt security to make scheduled interest or principal payments, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. The cash flows are estimated using information relevant to the collectability of the security, including information about past events, current conditions and reasonable and supportable forecasts. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Investments in Federal Reserve Bank ("FRB") and Federal Home Loan Bank ("FHLB") stock are required for membership in those organizations and are carried at cost since there is no market value available. The FHLB New York ("FHLBNY") continues to pay dividends and repurchase stock. As such, the Company has not recognized any impairment on its holdings of FRB and FHLB stock. Cybersecurity Risk Management, Strategy, Governance and Incident Disclosure: In July 2023, the SEC adopted amendments intended to enhance and standardize disclosures related to cybersecurity. The amendments became effective December 18, 2023 and require timely disclosure of material cybersecurity incidents and annual disclosures related to cybersecurity risk management, strategy, and governance. Under the new rules, a material cybersecurity incident is required to be disclosed on a Form 8-K within four business days after the learning of a material incident. The SEC has defined a cybersecurity incident to mean “an unauthorized occurrence, or a series of related unauthorized occurrences, on or conducted through a registrant’s information systems that jeopardizes the confidentiality, integrity, or availability of a registrant’s information systems or any information residing therein.” Risk management and strategy - Annually, Registrants are required to describe the processes, if any, for assessing, identifying,and managing material risks from cybersecurity threats in sufficient detail for a reasonable investor to understand those processes. The registrant must also describe whether and how any risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, have materially affected or are reasonably likely to materially affect the registrant, including its business strategy, results of operations, or financial condition. Governance - Disclosure is required about management’s and the board of directors’ oversight of cybersecurity risk, including a description of the board of directors’ oversight of risks from cybersecurity threats and a description of management’s role in assessing and managing the registrant’s material risks from cybersecurity threats. The annual disclosure requirements became effective for the Company beginning with the 2023 Form 10-K.

Cash and Cash Equivalents

Cash and Cash Equivalents	3 Months Ended
	Mar. 31, 2024
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	CASH AND CASH EQUIVALENTS (In Thousands) The following table is the schedule of Cash and Cash Equivalents at March 31, 2024, December 31, 2023 and March 31, 2023: March 31, 2024 December 31, 2023 March 31, 2023 Cash and Due From Banks $ 27,356 $ 36,755 $ 25,107 Interest-bearing Deposits at Banks 255,109 105,781 178,365 Total Cash and Cash Equivalents $ 282,465 142,536 203,472

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES (In Thousands) The following table is the schedule of Available-For-Sale Securities at March 31, 2024, December 31, 2023 and March 31, 2023: Available-For-Sale Securities U.S. Treasuries U.S. Government & Agency State and Mortgage- Corporate Total March 31, 2024 Available-For-Sale Securities, $ 74,190 $ 160,000 $ 280 $ 294,858 $ 1,000 $ 530,328 Gross Unrealized Gains 4 39 — 13 — 56 Gross Unrealized Losses (42) (7,290) — (37,154) (65) (44,551) Available-For-Sale Securities, 74,152 152,749 280 257,717 935 485,833 Available-For-Sale Securities, 310,587 Maturities of Debt Securities, Within One Year $ 49,263 $ 30,000 $ — $ 2,555 $ — $ 81,818 From 1 - 5 Years 24,927 130,000 — 152,490 — 307,417 From 5 - 10 Years — — 280 139,813 1,000 141,093 Over 10 Years — — — — — — Maturities of Debt Securities, Within One Year $ 49,260 $ 29,498 $ — $ 2,491 $ — $ 81,249 From 1 - 5 Years 24,892 123,251 — 137,632 — 285,775 From 5 - 10 Years — — 280 117,594 935 118,809 Over 10 Years — — — — — — Securities in a Continuous Less than 12 Months $ 49,287 $ — $ — $ 71 $ — $ 49,358 12 Months or Longer — 137,710 — 252,064 935 390,709 Total $ 49,287 $ 137,710 $ — $ 252,135 $ 935 $ 440,067 Number of Securities in a 2 19 — 98 1 120 Unrealized Losses on Less than 12 Months $ 42 $ — $ — $ — $ — $ 42 12 Months or Longer — 7,290 — 37,154 65 44,509 Total $ 42 $ 7,290 $ — $ 37,154 $ 65 $ 44,551 Disaggregated Details: US Treasuries, $ 74,190 US Treasuries, 74,152 US Agency Obligations, $ 160,000 US Agency Obligations, 152,749 Local Municipal Obligations, $ 280 Local Municipal Obligations, 280 US Government Agency $ 7,180 Available-For-Sale Securities U.S. Treasuries U.S. Government & Agency State and Mortgage- Corporate Total US Government Agency 6,843 Government Sponsored Entity 287,678 Government Sponsored Entity 250,874 Corporate Trust Preferred Securities, at Amortized Cost $ 1,000 Corporate Trust Preferred Securities, at Fair Value 935 December 31, 2023 Available-For-Sale Securities, $ 73,761 $ 160,000 $ 280 $ 305,161 $ 1,000 $ 540,202 Gross Unrealized Gains 243 51 — 6 — 300 Gross Unrealized Losses — (7,126) — (35,407) (200) (42,733) Available-For-Sale Securities, 74,004 152,925 280 269,760 800 497,769 Available-For-Sale Securities, 242,938 Securities in a Continuous Less than 12 Months $ — $ — $ — $ — $ — $ — 12 Months or Longer — 137,874 — 269,286 800 407,960 Total $ — $ 137,874 $ — $ 269,286 $ 800 $ 407,960 Number of Securities in a — 19 — 97 1 117 Unrealized Losses on Less than 12 Months $ — $ — $ — $ — $ — $ — 12 Months or Longer — 7,126 — 35,407 200 42,733 Total $ — $ 7,126 $ — $ 35,407 $ 200 $ 42,733 Disaggregated Details: US Treasuries, $ 73,761 US Treasuries, 74,004 US Agency Obligations, $ 160,000 US Agency Obligations, 152,925 Local Municipal Obligations, $ 280 Local Municipal Obligations, 280 US Government Agency $ 7,291 US Government Agency 6,864 Government Sponsored Entity 297,870 Government Sponsored Entity 262,896 Corporate Trust Preferred Securities, at Amortized Cost $ 1,000 Available-For-Sale Securities U.S. Treasuries U.S. Government & Agency State and Mortgage- Corporate Total Corporate Trust Preferred Securities, at Fair Value 800 March 31, 2023 Available-For-Sale Securities, $ — $ 190,000 $ 320 $ 431,754 $ 1,000 $ 623,074 Gross Unrealized Gains — — — 160 — 160 Gross Unrealized Losses — (12,415) — (44,926) (200) (57,541) Available-For-Sale Securities, — 177,585 320 386,988 800 565,693 Available-For-Sale Securities, 360,153 Securities in a Continuous Less than 12 Months $ — $ 54,058 $ — $ 27,106 $ — $ 81,164 12 Months or Longer — 123,526 — 346,733 800 471,059 Total $ — $ 177,584 $ — $ 373,839 $ 800 $ 552,223 Number of Securities in a — 25 — 150 1 176 Unrealized Losses on Securities Less than 12 Months $ — $ 942 $ — $ 891 $ — $ 1,833 12 Months or Longer — 11,473 — 44,035 200 55,708 Total $ — $ 12,415 $ — $ 44,926 $ 200 $ 57,541 Disaggregated Details: US Treasury Obligations, $ — US Treasury Obligations, — US Agency Obligations, $ 190,000 US Agency Obligations, 177,585 Local Municipal Obligations, $ 320 Local Municipal Obligations, 320 US Government Agency $ 7,782 US Government Agency 7,321 Government Sponsored Entity 423,972 Government Sponsored Entity 379,667 Corporate Trust Preferred Securities, at Amortized Cost $ 1,000 Corporate Trust Preferred Securities, at Fair Value 800 At March 31, 2024, there was no allowance for credit losses for the AFS debt securities portfolio. The following table is the schedule of Held-To-Maturity Securities at March 31, 2024, December 31, 2023 and March 31, 2023: Held-To-Maturity Securities State and Mortgage- Total March 31, 2024 Held-To-Maturity Securities, $ 119,742 $ 8,309 $ 128,051 Gross Unrealized Losses (2,794) (396) (3,190) Held-To-Maturity Securities, 116,948 7,913 124,861 Held-To-Maturity Securities, 112,135 Held-To-Maturity Securities, 108,945 Maturities of Debt Securities, Within One Year $ 47,680 $ — $ 47,680 From 1 - 5 Years 69,839 8,309 78,148 From 5 - 10 Years 2,217 — 2,217 Over 10 Years 6 — 6 Maturities of Debt Securities, Within One Year $ 47,387 $ — $ 47,387 From 1 - 5 Years 67,392 7,913 75,305 From 5 - 10 Years 2,163 — 2,163 Over 10 Years 6 — 6 Securities in a Continuous Less than 12 Months $ 1,143 $ — $ 1,143 12 Months or Longer 98,954 7,913 106,867 Total $ 100,097 $ 7,913 $ 108,010 Number of Securities in a 308 16 324 Unrealized Losses on Securities Less than 12 Months $ 17 $ — $ 17 12 Months or Longer 2,777 396 3,173 Total $ 2,794 $ 396 $ 3,190 Disaggregated Details: Municipal Obligations, at Amortized Cost $ 119,742 Municipal Obligations, at Fair Value 116,948 US Government Agency $ 2,911 Held-To-Maturity Securities State and Mortgage- Total US Government Agency 2,766 Government Sponsored Entity 5,398 Government Sponsored Entity 5,147 December 31, 2023 Held-To-Maturity Securities, $ 122,450 $ 8,945 $ 131,395 Gross Unrealized Losses (2,157) (401) (2,558) Held-To-Maturity Securities, 120,293 8,544 128,837 Held-To-Maturity Securities, 115,030 Held-To-Maturity Securities, 112,472 Securities in a Continuous Less than 12 Months $ 1,472 $ — $ 1,472 12 Months or Longer 102,839 8,544 111,383 Total $ 104,311 $ 8,544 $ 112,855 Number of Securities in a 319 16 335 Unrealized Losses on Less than 12 Months $ 14 $ — $ 14 12 Months or Longer 2,143 402 2,545 Total $ 2,157 $ 402 $ 2,559 Disaggregated Details: Municipal Obligations, at Amortized Cost $ 122,450 Municipal Obligations, at Fair Value 120,293 US Government Agency $ 3,114 US Government Agency 2,954 Government Sponsored Entity 5,831 Government Sponsored Entity 5,589 March 31, 2023 Held-To-Maturity Securities, $ 156,314 $ 11,033 $ 167,347 Gross Unrealized Gains 2 — 2 Gross Unrealized Losses (2,421) (489) (2,910) Held-To-Maturity Securities, 153,895 10,544 164,439 Held-To-Maturity Securities State and Mortgage- Total Held-To-Maturity Securities, 149,810 Held-To-Maturity Securities, 146,902 Securities in a Continuous Less than 12 Months $ 43,121 $ — $ 43,121 12 Months or Longer 90,439 10,544 100,983 Total $ 133,560 $ 10,544 $ 144,104 Number of Securities in a 386 16 402 Unrealized Losses on Less than 12 Months $ 496 $ — $ 496 12 Months or Longer 1,925 489 2,414 Total $ 2,421 $ 489 $ 2,910 Disaggregated Details: Municipal Obligations, at Amortized Cost $ 156,314 Municipal Obligations, at Fair Value 153,895 US Government Agency $ 3,699 US Government Agency 3,522 Government Sponsored Entity 7,334 Government Sponsored Entity 7,022 In the tables above, maturities of mortgage-backed securities are included based on their contractual lives. Actual maturities will differ because issuers may have the right to call or prepay obligations with or without prepayment penalties. Arrow's investment policy requires that investments held in our portfolio be investment grade or better at the time of purchase. Arrow performs an analysis of the creditworthiness of municipal obligations to determine if a security is of investment grade. The analysis may include but may not solely rely upon credit analysis conducted by external credit rating agencies. Arrow evaluates AFS debt securities in unrealized loss positions at each measurement date to determine whether the decline in the fair value below the amortized cost basis (impairment) is due to credit-related factors or non-credit-related factors. Any impairment that is not credit related is recognized in other comprehensive income, net of applicable taxes. Credit-related impairment is recognized within the allowance for credit losses on the balance sheet, limited to the amount by which the amortized cost basis exceeds the fair value, with a corresponding adjustment to earnings via credit loss expense. Arrow determined that at March 31, 2024, gross unrealized losses were primarily attributable to changes in interest rates, relative to when the investment securities were purchased, and not due to the credit quality of the investment securities. Arrow does not intend to sell, nor is it more likely than not that Arrow will be required to sell any securities before recovery of its amortized cost basis, which may be at maturity. Therefore, Arrow carried no allowance for credit loss at March 31, 2024 and there was no credit loss expense recognized by Arrow with respect to the securities portfolio during the three months ended March 31, 2024. Arrow's HTM debt securities are comprised of U.S. government-sponsored enterprises (GSEs) or state and municipal obligations. GSE securities carry the explicit and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. Arrow determined that the expected credit loss on its HTM debt portfolio was immaterial and therefore no allowance for credit loss was recorded as of March 31, 2024. The following table is the schedule of Equity Securities at March 31, 2024, December 31, 2023 and March 31, 2023: Equity Securities March 31, 2024 December 31, 2023 March 31, 2023 Equity Securities, at Fair Value $1,942 $1,925 $2,070 The following is a summary of realized and unrealized gains and losses recognized in net income on equity securities during the three and three month periods ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Net Gain (Loss) on Equity Securities $ 17 $ (104) Less: Net gain recognized during the reporting period on equity securities sold during the period — — Unrealized net gain (loss) recognized during the reporting period on equity securities still held at the reporting date $ 17 $ (104)

Loans

Loans	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Loans	LOANS (In Thousands) Loan Categories and Past Due Loans The following two tables present loan balances outstanding as of March 31, 2024, December 31, 2023 and March 31, 2023 and an analysis of the recorded investment in loans that are past due at these dates. Generally, Arrow considers a loan past due 30 or more days when the borrower is two payments past due. Loans held-for-sale of $215, $165 and $417 as of March 31, 2024, December 31, 2023 and March 31, 2023, respectively, are included in the residential real estate balances for current loans. Schedule of Past Due Loans by Loan Category Commercial Commercial Real Estate Consumer Residential Total March 31, 2024 Loans Past Due 30-59 Days $ 419 $ 494 $ 12,140 $ 2,215 $ 15,268 Loans Past Due 60-89 Days 24 — 2,600 409 3,033 Loans Past Due 90 or more Days 35 15,148 1,429 3,506 20,118 Total Loans Past Due 478 15,642 16,169 6,130 38,419 Current Loans 161,911 735,327 1,109,585 1,213,516 3,220,339 Total Loans $ 162,389 $ 750,969 $ 1,125,754 $ 1,219,646 $ 3,258,758 December 31, 2023 Loans Past Due 30-59 Days $ 298 $ — $ 13,511 $ 3,715 $ 17,524 Loans Past Due 60-89 Days 21 636 5,579 861 7,097 Loans Past Due 90 or more Days 30 15,308 1,801 3,140 20,279 Total Loans Past Due 349 15,944 20,891 7,716 44,900 Current Loans 155,875 729,543 1,090,776 1,191,814 3,168,008 Total Loans $ 156,224 $ 745,487 $ 1,111,667 $ 1,199,530 $ 3,212,908 March 31, 2023 Loans Past Due 30-59 Days $ 62 $ — $ 11,237 $ 1,593 $ 12,892 Loans Past Due 60-89 Days 47 — 4,439 — 4,486 Loans Past Due 90 or more Days — — 3,005 3,143 6,148 Total Loans Past Due 109 — 18,681 4,736 23,526 Current Loans 135,808 715,357 1,054,688 1,075,973 2,981,826 Total Loans $ 135,917 $ 715,357 $ 1,073,369 $ 1,080,709 $ 3,005,352 Schedule of Non Accrual Loans by Category Commercial March 31, 2024 Commercial Real Estate Consumer Residential Total Loans 90 or More Days Past Due $ — $ — $ 13 $ 1,134 $ 1,147 Nonaccrual Loans 35 15,148 1,525 3,536 20,244 Nonaccrual With No Allowance for Credit Loss 35 15,148 1,525 3,536 20,244 Interest Income on Nonaccrual Loans — — — — — December 31, 2023 Loans 90 or More Days Past Due $ — $ — $ 6 $ 446 $ 452 Nonaccrual Loans 30 15,308 1,877 3,430 20,645 March 31, 2023 Loans 90 or More Days Past Due $ — $ — $ — $ 241 $ 241 Nonaccrual Loans 8 3,085 3,123 4,636 10,852 Arrow disaggregates its loan portfolio into the following four categories: Commercial - Arrow offers a variety of loan options to meet the specific needs of our commercial customers including term loans, time notes and lines of credit. Such loans are made available to businesses for working capital needs such as inventory and receivables, business expansion and equipment purchases. Generally, a collateral lien is placed on equipment or other assets owned by the borrower. Generally, these loans carry a higher risk than commercial real estate loans due to the nature of the underlying collateral, which can be business assets such as equipment and accounts receivable and generally have a lower liquidation value than real estate. In the event of default by the borrower, Arrow may be required to liquidate collateral at deeply discounted values. To reduce the risk, management usually obtains personal guarantees to support the borrowing, as permitted by applicable law. Commercial Real Estate - Arrow offers commercial real estate loans to finance real estate purchases, refinancings, expansions and improvements to commercial properties. Commercial real estate loans are made to finance the purchases of real property which generally consists of real estate with completed structures. These commercial real estate loans are typically secured by first liens on the real estate, which may include apartments, commercial structures, housing businesses, healthcare facilities, and both owner- and non-owner-occupied facilities. These loans are typically less risky than commercial loans, since they are secured by real estate and buildings, and are generally originated in amounts of no more than 80% of the appraised value of the property. However, Arrow also offers commercial construction and land development loans to finance projects. Many projects will ultimately be used by the borrowers' businesses, while others are developed for resale. These real estate loans are also typically secured by first liens on the real estate, which may include apartments, commercial structures, housing businesses, healthcare facilities and both owner-occupied and non-owner-occupied facilities. There is enhanced risk during the construction period, since the loan is secured by an incomplete project. Arrow’s Commercial Real Estate loans are primarily located within the footprint of the Company’s branch network, with some loans extending into the greater upstate New York area. Arrow does not provide Commercial Real Estate loans in major metropolitan areas such as New York City, Boston, etc Consumer Loans - This category is primarily comprised of automobile loans. Arrow primarily finances the purchases of automobiles indirectly through dealer relationships located throughout upstate New York and Vermont. Most automobile loans carry a fixed rate of interest with principal repayment terms typically ranging from three one Residential - Residential real estate loans consist primarily of loans secured by first or second mortgages on primary residences. Arrow originates fixed-rate and adjustable-rate one-to-four-family residential real estate loans for the construction, purchase of real estate or refinancing of an existing mortgage. These loans are collateralized primarily by owner-occupied properties generally located in Arrow's market area. Loans on one-to-four-family residential real estate are generally originated in amounts of no more than 80% of the purchase price or appraised value (whichever is lower), or have private mortgage insurance. Arrow’s underwriting analysis for residential mortgage loans typically includes credit verification, independent appraisals, and a review of the borrower’s financial condition. Mortgage title insurance and hazard insurance are normally required. It is Arrow's general practice to underwrite residential real estate loans to secondary market standards. Construction loans have a unique risk, because they are secured by an incomplete dwelling. This risk is reduced through periodic site inspections, including one at each loan draw period. In addition, Arrow offers fixed home equity loans, as well as home equity lines of credit to consumers to finance home improvements, debt consolidation, education and other uses. Arrow's policy allows for a maximum loan to value ratio of 80%, although periodically higher advances are allowed. Arrow originates home equity lines of credit and second mortgage loans (loans secured by a second junior lien position on one-to-four-family residential real estate). Risk is generally reduced through underwriting criteria, which include credit verification, appraisals, a review of the borrower's financial condition, and personal cash flows. A security interest, with title insurance when necessary, is taken in the underlying real estate. Allowance for Credit Losses Loan segments were selected by class code and application code to ensure each segment is comprised of loans with homogenous loan characteristics and similar risk profiles. The resulting loan segments are commercial, commercial real estate, consumer and residential real estate loans. The consumer segment is mainly comprised of automobile loans, and since they are relatively short-term in nature, with similar dollar amounts and collateral, the vintage analysis method was selected to determine the credit loss reserve. The vintage method utilizes Arrow loan data exclusively as the method calculates a loss rate based on the total origination balance of the loans by year and the charge-off and recovery rate of the same origination year. Arrow maintains, over the life of the loan, the loss curve by vintage year. The discounted cash flow method (DCF) is used to calculate the reserve for credit losses for the commercial, commercial real estate and residential real estate segments. The March 31, 2024 allowance for credit losses calculation incorporated a reasonable and supportable forecast period to account for economic conditions utilized in the measurement. The quantitative model utilized an economic forecast sourced from reputable third-parties that reflects the economic conditions with a slight improvement in the national unemployment rate of approximately 0.32% during the six-quarter forecast period and forecasted gross domestic product projected to improve by approximately 0.65%. The home price index (HPI) forecast increased approximately 0.03% from the previous quarter level. The overall change in the allowance from December 31, 2023 was primarily driven by the following factors: net loan growth contributed $0.4 million, changes in macro economic conditions reduced the allowance by $1.8 million, qualitative factors increased the allowance by $0.9 million, and a specific reserve of $0.7 million tied to overdraft balances from an instance of check fraud related to one customer relationship. The first quarter provision for credit losses was $617 thousand. In addition, Arrow recorded a credit for estimated credit losses on off-balance sheet credit exposures in other liabilities of $466 thousand in the first quarter of 2024. Management's evaluation considers the allowance for credit losses for loans to be appropriate as of March 31, 2024. The following table details activity in the allowance for credit losses on loans for the three ended March 31, 2024 and March 31, 2023: Allowance for Credit Losses Commercial Commercial Real Estate Consumer Residential Total Rollforward of the Allowance for Credit Losses for the Quarterly Period: December 31, 2023 $ 1,958 $ 15,521 $ 2,566 $ 11,220 $ 31,265 Charge-offs $ (9) $ — $ (1,274) $ — $ (1,283) Recoveries $ — $ — $ 962 $ — $ 962 Provision $ 893 $ (1,353) $ 502 $ 575 $ 617 March 31, 2024 $ 2,842 $ 14,168 $ 2,756 $ 11,795 $ 31,561 December 31, 2022 $ 1,961 $ 15,213 $ 2,585 $ 10,193 $ 29,952 Charge-offs $ — $ — $ (1,328) $ — $ (1,328) Recoveries $ — $ — $ 606 $ — $ 606 Provision $ (224) $ 289 $ 1,000 $ 489 $ 1,554 March 31, 2023 $ 1,737 $ 15,502 $ 2,863 $ 10,682 $ 30,784 Estimated Credit Losses on Off-Balance Sheet Credit Exposures Recognized as Other Liabilities Financial instrument credit losses apply to off-balance sheet credit exposures such as unfunded loan commitments and standby letters of credit. A liability for expected credit losses for off-balance sheet exposures is recognized if the entity has a present contractual obligation to extend the credit and the obligation is not unconditionally cancellable by the entity. Changes in this allowance are reflected in other operating expenses within the non-interest expense category. As of March 31, 2024, the total unfunded commitment off-balance sheet credit exposure was $1.1 million. Individually Evaluated Loans All loans not included in the vintage analysis method that exceed $250,000, which are on nonaccrual status, are evaluated on an individual basis. Arrow made the policy election to apply a practical expedient for collateral dependent financial assets when the borrower is experiencing financial difficulty and the repayment is expected through the sale of the collateral. This allows Arrow to use fair value of the collateral at the reporting date adjusted for estimated cost to sell when recording the net carrying amount of the asset and determining the allowance for credit losses for a financial asset. In the event where the repayment of a collateral dependent financial asset is expected to be provided substantially through the operating of the collateral, Arrow will use fair value of the collateral at the reporting date when recording the net carrying amount of the asset and determining the allowance for credit losses. As of March 31, 2024, there were five total relationships identified to be evaluated for loss on an individual basis which had an amortized cost basis of $17.1 million and none had an allowance for credit loss. The following tables present the amortized cost basis of collateral-dependent loans by class of loans as of March 31, 2024, December 31, 2023 and March 31, 2023: March 31, 2024 Collateral Type -Residential Real Estate Collateral Type - Commercial Real Estate Total Loans Commercial $ — $ — $ — Commercial Real Estate — 15,179 15,179 Consumer — — — Residential 1,886 — 1,886 Total $ 1,886 $ 15,179 $ 17,065 December 31, 2023 Collateral Type -Residential Real Estate Collateral Type - Commercial Real Estate Total Loans Commercial $ — $ — $ — Commercial Real Estate — 15,308 15,308 Consumer — — — Residential 1,446 — 1,446 Total $ 1,446 $ 15,308 $ 16,754 March 31, 2023 Collateral Type -Residential Real Estate Collateral Type - Commercial Real Estate Total Loans Commercial $ — $ — $ — Commercial Real Estate — 3,027 3,027 Consumer — — — Residential 1,949 — 1,949 Total $ 1,949 $ 3,027 $ 4,976 Allowance for Credit Losses - Collectively and Individually Evaluated Commercial Commercial Real Estate Consumer Residential Total March 31, 2024 Ending Loan Balance - Collectively Evaluated $ 160,894 $ 735,821 $ 1,125,754 $ 1,217,758 $ 3,240,227 Allowance for Credit Losses - Loans Collectively Evaluated 2,110 14,168 2,756 11,795 30,829 Ending Loan Balance - Individually Evaluated 1,495 15,148 — 1,888 18,531 Allowance for Credit Losses - Loans Individually Evaluated 732 — — — 732 December 31, 2023 Ending Loan Balance - Collectively Evaluated $ 156,224 $ 730,179 $ 1,111,667 $ 1,198,084 $ 3,196,154 Allowance for Credit Losses - Loans Collectively Evaluated 1,958 15,521 2,566 11,220 31,265 Ending Loan Balance - Individually Evaluated — 15,308 — 1,446 16,754 Allowance for Credit Losses - Loans Individually Evaluated — — — — — March 31, 2023 Ending Loan Balance - Collectively Evaluated $ 135,917 $ 712,330 $ 1,073,369 $ 1,078,760 $ 3,000,376 Allowance for Credit Losses - Loans Collectively Evaluated 1,737 15,502 2,863 10,682 30,784 Ending Loan Balance - Individually Evaluated — 3,027 — 1,949 4,976 Allowance for Credit Losses - Loans Individually Evaluated — — — — — Through the provision for credit losses, an allowance for credit losses is maintained that reflects the best estimate of the calculated expected credit losses in Arrow's loan portfolio as of the balance sheet date. Additions are made to the allowance for credit losses through a periodic provision for credit losses. Actual credit losses are charged against the allowance for credit losses when loans are deemed uncollectible and recoveries of amounts previously charged off are recorded as credits to the allowance for credit losses. Arrow's loan officers and risk managers meet at least quarterly to discuss and review the conditions and risks associated with certain criticized and classified commercial-related relationships. In addition, the independent internal loan review department performs periodic reviews of the credit quality indicators on individual loans in the commercial loan portfolio. Arrow considers the need to qualitatively adjust expected credit loss estimates for information not already captured in the loss estimation process. These qualitative factor adjustments may increase or decrease management’s estimate of expected credit losses. Adjustments are not made for information that has already been considered and included in the loss estimation process. Arrow considers the qualitative factors that are relevant as of the reporting date, which may include, but are not limited to the following factors: • The nature and volume of Arrow's financial assets; • The existence, growth, and effect of any concentrations of credit; • The volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans; • The value of the underlying collateral for loans that are not collateral-dependent; • Arrow's lending policies and procedures, including changes in underwriting standards and practices for collections, write-offs, and recoveries; • The quality of Arrow's loan review function; • The experience, ability, and depth of Arrow's lending, investment, collection, and other relevant management/staff; • The effect of other external factors such as the regulatory, legal and technological environments; competition; and events such as natural disasters; • Actual and expected changes in international, national, regional, and local economic and business conditions and developments in which the institution operates that affect the collectability of financial assets; and, • Other qualitative factors not reflected in quantitative loss rate calculations. Loan Credit Quality Indicators and Modification In 2023 and the first quarter of 2024, no loans met the criteria for disclosure as part of ASU 2022-02. Any modifications of loans were either immaterial in natural or were made for competitive purposes, i.e., the borrowers were not experiencing financial hardship. The following tables present credit quality indicators by total loans amortized cost basis by origination year as of March 31, 2024, December 31, 2023 and March 31, 2023: Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Revolving Loan Converted to Term Total March 31, 2024 2024 2023 2022 2021 2020 Prior Commercial: Risk rating Satisfactory $ 8,925 $ 25,424 $ 18,661 $ 17,276 $ 5,645 $ 69,588 $ 9,915 $ — $ 155,434 Special mention — — — — 106 — — — 106 Substandard — — — — — 3,129 3,720 — 6,849 Doubtful — — — — — — — — — Total Commercial Loans $ 8,925 $ 25,424 $ 18,661 $ 17,276 $ 5,751 $ 72,717 $ 13,635 $ — $ 162,389 Current-period gross charge-offs $ — $ — $ — $ — $ 9 $ — $ — $ — $ 9 Commercial Real Estate: Risk rating Satisfactory $ 9,548 $ 50,480 $ 109,750 $ 60,070 $ 84,319 $ 368,036 $ 1,885 $ — $ 684,088 Special mention — — 3,092 — — 15,380 — — 18,472 Substandard — 149 9,038 1,670 2,328 35,102 122 — 48,409 Doubtful — — — — — — — — — Total Commercial Real Estate Loans $ 9,548 $ 50,629 $ 121,880 $ 61,740 $ 86,647 $ 418,518 $ 2,007 $ — $ 750,969 Current-period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Consumer: Risk rating Performing $ 83,515 $ 261,853 $ 208,788 $ 110,546 $ 50,713 $ 407,586 $ 459 $ — $ 1,123,460 Nonperforming — 136 291 182 64 1,611 10 — 2,294 Total Consumer Loans $ 83,515 $ 261,989 $ 209,079 $ 110,728 $ 50,777 $ 409,197 $ 469 $ — $ 1,125,754 Current-period gross charge-offs $ 583 $ 150 $ 248 $ 177 $ 104 $ 12 $ — $ — $ 1,274 Residential: Risk rating Performing $ 12,555 $ 82,726 $ 185,667 $ 166,141 $ 86,843 $ 564,901 $ 115,104 $ — $ 1,213,937 Nonperforming — 189 442 1,654 — 3,094 330 — 5,709 Total Residential Loans $ 12,555 $ 82,915 $ 186,109 $ 167,795 $ 86,843 $ 567,995 $ 115,434 $ — $ 1,219,646 Current-period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Total Loans $ 114,543 $ 420,957 $ 535,729 $ 357,539 $ 230,018 $ 1,468,427 $ 131,545 $ — $ 3,258,758 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Revolving Loan Converted to Term Total December 31, 2023 2023 2022 2021 2020 2019 Prior Commercial: Risk rating Satisfactory $ 54,584 $ 34,047 $ 23,470 $ 9,655 $ 4,107 $ 13,360 $ 8,586 $ — $ 147,809 Special mention — — — 117 — — — — 117 Substandard — — — — — 3,199 5,099 — 8,298 Doubtful — — — — — — — — — Total Commercial Loans $ 54,584 $ 34,047 $ 23,470 $ 9,772 $ 4,107 $ 16,559 $ 13,685 $ — $ 156,224 Commercial Real Estate: Risk rating Satisfactory $ 81,582 $ 151,818 $ 105,365 $ 120,845 $ 41,406 $ 174,516 $ 1,667 $ — $ 677,199 Special mention — 10,439 — — — 4,084 — — 14,523 Substandard 150 9,169 1,670 2,533 791 38,955 497 — 53,765 Doubtful — — — — — — — — — Total Commercial Real Estate Loans $ 81,732 $ 171,426 $ 107,035 $ 123,378 $ 42,197 $ 217,555 $ 2,164 $ — $ 745,487 Consumer: Risk rating Performing $ 405,099 $ 355,217 $ 195,799 $ 93,708 $ 44,206 $ 15,252 $ — $ — $ 1,109,281 Nonperforming 208 783 551 210 81 85 468 — 2,386 Total Consumer Loans $ 405,307 $ 356,000 $ 196,350 $ 93,918 $ 44,287 $ 15,337 $ 468 $ — $ 1,111,667 Residential: Risk rating Performing $ 161,878 $ 231,365 $ 192,588 $ 116,451 $ 73,875 $ 296,935 $ 122,573 $ — $ 1,195,665 Nonperforming — — 444 666 127 2,268 360 — 3,865 Total Residential Loans $ 161,878 $ 231,365 $ 193,032 $ 117,117 $ 74,002 $ 299,203 $ 122,933 $ — $ 1,199,530 Total Loans $ 703,501 $ 792,838 $ 519,887 $ 344,185 $ 164,593 $ 548,654 $ 139,250 $ — $ 3,212,908 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Revolving Loan Converted to Term Total March 31, 2023 2023 2022 2021 2020 2019 Prior Commercial: Risk rating Satisfactory $ 4,727 $ 35,164 $ 26,254 $ 12,765 $ 6,830 $ 35,014 $ 8,095 $ — $ 128,849 Special mention — — — 150 — 26 26 — 202 Substandard — — — 230 420 3,420 2,796 — 6,866 Doubtful — — — — — — — — — Total Commercial Loans $ 4,727 $ 35,164 $ 26,254 $ 13,145 $ 7,250 $ 38,460 $ 10,917 $ — $ 135,917 Commercial Real Estate: Risk rating Satisfactory $ 12,605 $ 157,534 $ 115,019 $ 122,364 $ 42,710 $ 212,115 $ 1,679 $ — $ 664,026 Special mention — — — — — 5,043 — — 5,043 Substandard — 10,150 — 5,472 806 29,832 28 — 46,288 Doubtful — — — — — — — — — Total Commercial Real Estate Loans $ 12,605 $ 167,684 $ 115,019 $ 127,836 $ 43,516 $ 246,990 $ 1,707 $ — $ 715,357 Consumer: Risk rating Performing $ 71,838 $ 379,339 $ 261,675 $ 138,034 $ 75,650 $ 143,190 $ — $ — $ 1,069,726 Nonperforming — 1,030 1,090 434 261 371 457 — 3,643 Total Consumer Loans $ 71,838 $ 380,369 $ 262,765 $ 138,468 $ 75,911 $ 143,561 $ 457 $ — $ 1,073,369 Residential: Risk rating Performing $ 15,565 $ 219,336 $ 197,436 $ 124,992 $ 80,986 $ 323,945 $ 113,220 $ — $ 1,075,480 Nonperforming — 550 435 939 636 2,462 207 — 5,229 Total Residential Loans $ 15,565 $ 219,886 $ 197,871 $ 125,931 $ 81,622 $ 326,407 $ 113,427 $ — $ 1,080,709 Total Loans $ 104,735 $ 803,103 $ 601,909 $ 405,380 $ 208,299 $ 755,418 $ 126,508 $ — $ 3,005,352 For the purposes of the table above, nonperforming consumer and residential loans were those loans on nonaccrual status or were 90 days or more past due and still accruing interest. As of March 31, 2024, the amortized cost of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process is $2.5 million. For the allowance calculation, an internally developed system of five credit quality indicators is used to rate the credit worthiness of each commercial loan defined as follows: 1) Satisfactory - "Satisfactory" borrowers have acceptable financial condition with satisfactory record of earnings and sufficient historical and projected cash flow to service the debt. Borrowers have satisfactory repayment histories and primary and secondary sources of repayment can be clearly identified; 2) Special Mention - Loans in this category have potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution’s credit position at some future date. "Special mention" assets are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification. Loans which might be assigned this credit quality indicator include loans to borrowers with deteriorating financial strength and/or earnings record and loans with potential for problems due to weakening economic or market conditions; 3) Substandard - Loans classified as “substandard” are inadequately protected by the current sound net worth or paying capacity of the borrower or the collateral pledged, if any. Loans in this category have well defined weaknesses that jeopardize the repayment. They are characterized by the distinct possibility that Arrow will sustain some loss if the deficiencies are not corrected. “Substandard” loans may include loans which are likely to require liquidation of collateral to effect repayment, and other loans where character or ability to repay has become suspect. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets classified substandard; 4) Doubtful - Loans classified as “doubtful” have all of the weaknesses inherent in those classified as “substandard” with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of current existing facts, conditions, and values, highly questionable and improbable. Although possibility of loss is extremely high, classification of these loans as “loss” has been deferred due to specific pending factors or events which may strengthen the value (e.g. possibility of additional collateral, injection of capital, collateral liquidation, debt restructure, economic recovery, etc). Loans classified as “doubtful” need to be placed on non-accrual; and 5) Loss - Loans classified as “loss” are considered uncollectible with collateral of such little value that their continuance as bankable assets is not warranted. As of the date of the balance sheet, all loans in this category have been charged-off to the allowance for loan losses. Commercial loans are generally evaluated on an annual basis depending on the size and complexity of the loan relationship, unless the credit related quality indicator falls to a level of "special mention" or below, when the loan is evaluated quarterly. The credit quality indicator is one of the factors used in assessing the level of incurred risk of loss in our commercial related loan portfolios.

Debt

Debt	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Debt	DEBT (Dollars in Thousands) Schedule of Borrowings: March 31, 2024 December 31, 2023 March 31, 2023 Balance: BTFP Advances $ 100,000 $ — $ — FHLBNY Overnight Advances — 20,000 35,000 FHLBNY Term Advances 6,500 6,500 107,800 Total Borrowings $ 106,500 $ 26,500 $ 142,800 Maximum Borrowing Capacity: Federal Funds Purchased $ 28,000 $ 28,000 $ 52,000 Federal Home Loan Bank of New York 604,729 576,602 778,368 Federal Reserve Bank of New York 851,886 738,511 689,883 Available Borrowing Capacity: Federal Funds Purchased $ 28,000 $ 28,000 $ 52,000 Federal Home Loan Bank of New York 553,229 550,102 535,568 Federal Reserve Bank of New York 751,886 738,511 689,883 Arrow's subsidiary banks have in place unsecured federal funds lines of credit with two correspondent banks. As a member of the FHLBNY, Arrow participates in the advance program which allows for overnight and term advances up to the limit of pledged collateral, including FHLBNY stock and any loans secured by real estate such as commercial real estate, residential real estate and home equity loans (see Notes 4: Investment Securities, and 5: Loans to the Consolidated Financial Statements). The maximum borrowing capacities at the FHLBNY and FRB are determined based on the fair value of the collateral pledged, subject to discounts determined by the respective lenders. As of March 31, 2024, the carrying cost for the FHLBNY collateral was approximately $875 million and approximately $1.1 billion for the FRB. As of March 31, 2024, the fair value for the FHLBNY collateral was approximately $737 million and approximately $1.1 billion for the FRB. The investment in FHLBNY stock is proportional to the total of Arrow's overnight and term advances (see the Schedule of FFRB and FHLB Stock in Note 4, Investment Securities, to the Consolidated Financial Statements). Arrow's bank subsidiaries have also established borrowing facilities with the FRB of New York for potential “discount window” advances, pledging certain consumer loans as collateral (see Note 5, Loans , to the Consolidated Financial Statements). Debt Maturities BTFP Advances - The BTFP was created to support American businesses and households by making additional funding available to eligible depository institutions to help assure banks have the ability to meet the needs of all their depositors. In the first quarter of 2024, Arrow borrowed $100 million pursuant to the BTFP. The BTFP Advances mature in January 2025 and have a weighted average interest rate of 4.76%. Maturity Schedule of FHLBNY Term Advances : Balances Weighted Average Rate Final Maturity 3/31/2024 12/31/2023 3/31/2023 3/31/2024 12/31/2023 3/31/2023 First Year $ 4,250 $ 4,250 $ 107,800 5.80 % 5.80 % 5.29 % Second Year 2,250 2,250 — 5.38 % 5.38 % — % Total $ 6,500 $ 6,500 $ 107,800 5.66 % 5.66 % 5.29 % Long Term Debt - Guaranteed Preferred Beneficial Interests in Corporation's Junior Subordinated Debentures At March 31, 2024, there were outstanding two classes of financial instruments issued by two separate subsidiary business trusts of Arrow, Arrow Capital Statutory Trust II ("ACST II") and Arrow Capital Statutory Trust III ("ACST III" and, together with ACST II, the "Trusts"), identified as “Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts” on the Consolidated Balance Sheets and the Consolidated Statements of Income. The first of the two classes of trust-issued instruments outstanding at year-end was issued by ACST II, a Delaware business trust established on July 16, 2003, upon the filing of a certificate of trust with the Delaware Secretary of State. In July 2003, ACST II issued all of its voting (common) stock to Arrow and issued and sold to an unaffiliated purchaser 30-year guaranteed preferred beneficial interests in the trust's assets ("ACST II TRUPS"). The rate on the securities is variable, previously adjusting quarterly to the now discontinued 3-month London Inter-Bank Offered Rate ("LIBOR") plus 3.15%. Arrow designated the Secured Overnight Financing Rate ("SOFR") as the replacement index for financial instruments. The rate on the securities are tied to the 3-month SOFR plus 3.15% post-conversion. ACST II used the proceeds of the sale of the ACST II TRUPS to purchase an identical amount of junior subordinated debentures issued by Arrow that bear an interest rate identical at all times to the rate payable on the ACST II TRUPS. The ACST II TRUPS became redeemable after July 23, 2008 and mature on July 23, 2033. The second of the two classes of trust-issued instruments outstanding at year-end was issued by ACST III, a Delaware business trust established on December 23, 2004, upon the filing of a certificate of trust with the Delaware Secretary of State. On December 28, 2004, the ACST III issued all of its voting (common) stock to Arrow and issued and sold to an unaffiliated purchaser 30-year guaranteed preferred beneficial interests in the trust's assets ("ACST III TRUPS"). The rate on the ACST III TRUPS is a variable rate, adjusting quarterly to the 3-month SOFR plus 2.00%. The rate previously adjusted quarterly to the now discontinued 3-month LIBOR plus 2.00% pre-conversion. ACST III used the proceeds of the sale of the ACST III TRUPS to purchase an identical amount of junior subordinated debentures issued by Arrow that bear an interest rate identical at all times to the rate payable on the ACST III TRUPS. The ACST III TRUPS became redeemable on or after March 31, 2010 and mature on December 28, 2034. Arrow has entered into interest rate swaps to synthetically fix the variable rate interest payments associated with $20 million in outstanding subordinated trust securities attributable to the Trusts. These agreements are designated as cash flow hedges. The primary assets of the Trusts are Arrow's junior subordinated debentures discussed above, and the sole revenues of the Trusts are payments received by them from Arrow with respect to the junior subordinated debentures. The trust preferred securities issued by the Trusts are non-voting. All common voting securities of the Trusts are owned by Arrow. Arrow used the net proceeds from its sale of junior subordinated debentures to the Trusts, facilitated by the Trusts' sale of their trust preferred securities to the purchasers thereof, for general corporate purposes. The trust preferred securities and underlying junior subordinated debentures, with associated expense that is tax deductible, qualify as Tier I capital under regulatory definitions. Arrow's primary source of funds to pay interest on the debentures that are held by the Trusts are current dividends received by Arrow from its subsidiary banks. Accordingly, Arrow's ability to make payments on the debentures, and the ability of the Trusts to make payments on their trust preferred securities, are dependent upon the continuing ability of Arrow's subsidiary banks to pay dividends to Arrow. Since the trust preferred securities issued by the subsidiary trusts and the underlying junior subordinated debentures issued by Arrow at March 31, 2024, December 31, 2023, and March 31, 2023 are classified as debt for financial statement purposes, the expense associated with these securities is recorded as interest expense in the Consolidated Statements of Income for the three years. Schedule of Guaranteed Preferred Beneficial Interests in Corporation's Junior Subordinated Debentures March 31, 2024 December 31, 2023 March 31, 2023 ACST II Balance $ 10,000 $ 10,000 $ 10,000 Period End: Variable Interest Rate 8.71 % 8.74 % 8.31 % Fixed Interest Rate resulting from cash flow hedge agreement 4.00 % 4.00 % 4.00 % ACST III Balance $ 10,000 $ 10,000 $ 10,000 Period End: Variable Interest Rate 7.56 % 7.59 % 7.16 % Fixed Interest Rate resulting from cash flow hedge agreement 2.86 % 2.86 % 2.86 %

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES (In Thousands) The following table presents the notional amount and fair value of Arrow's off-balance sheet commitments to extend credit and commitments under standby letters of credit as of March 31, 2024, December 31, 2023 and March 31, 2023: Commitments to Extend Credit and Letters of Credit March 31, 2024 December 31, 2023 March 31, 2023 Notional Amount: Commitments to Extend Credit $ 443,960 $ 444,256 $ 478,253 Standby Letters of Credit 3,401 3,824 3,424 Fair Value: Commitments to Extend Credit $ — $ — $ — Standby Letters of Credit 2 — 6 Arrow is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Commitments to extend credit include home equity lines of credit, commitments for residential and commercial construction loans and other personal and commercial lines of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of the involvement Arrow has in particular classes of financial instruments. Arrow'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 notional amount of those instruments. Arrow uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are not expected to be fully drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Arrow evaluates each customer's creditworthiness on a case-by-case basis. Home equity lines of credit are secured by residential real estate. Construction lines of credit are secured by underlying real estate. For other lines of credit, the amount of collateral obtained, if deemed necessary by Arrow upon extension of credit, is based on management's credit evaluation of the counterparty. Collateral held varies, but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties. Most of the commitments are variable rate instruments. Arrow does not issue any guarantees that would require liability-recognition or disclosure, other than its standby letters of credit. Arrow has issued conditional commitments in the form of standby letters of credit to guarantee payment on behalf of a customer and guarantee the performance of a customer to a third party. Standby letters of credit generally arise in connection with commercial lending relationships. The credit risk involved in issuing these instruments is essentially the same as that involved in extending loans to customers. Contingent obligations under standby letters of credit at March 31, 2024, December 31, 2023 and March 31, 2023 represent the maximum potential future payments Arrow could be required to make. Typically, these instruments have terms of 12 months or less and expire unused; therefore, the total amounts do not necessarily represent future cash requirements. Each customer is evaluated individually for creditworthiness under the same underwriting standards used for commitments to extend credit and on-balance sheet instruments. Arrow's policies governing loan collateral apply to standby letters of credit at the time of credit extension. Loan-to-value ratios will generally range from 50% for movable assets, such as inventory, to 100% for liquid assets, such as bank CD's. Fees for standby letters of credit range from 1% to 3% of the notional amount. Fees are collected upfront and amortized over the life of the commitment. The carrying amount and fair value of Arrow's standby letters of credit at March 31, 2024, December 31, 2023 and March 31, 2023, were insignificant. The fair value of standby letters of credit is based on the fees currently charged for similar agreements or the cost to terminate the arrangement with the counterparties. The fair value of commitments to extend credit is determined by estimating the fees to enter into similar agreements, taking into account the remaining terms and present creditworthiness of the counterparties, and for fixed rate loan commitments, the difference between the current and committed interest rates. Arrow provides several types of commercial lines of credit and standby letters of credit to its commercial customers. The pricing of these services is not isolated as Arrow considers the customer's complete deposit and borrowing relationship in pricing individual products and services. The commitments to extend credit also include commitments under home equity lines of credit, for which Arrow charges no fee. The carrying value and fair value of commitments to extend credit are not material and Arrow does not expect to incur any material loss as a result of these commitments. Except as noted below, Arrow, including its subsidiary banks, is not currently the subject of any material pending legal proceedings, other than ordinary routine litigation occurring in the normal course of their business. On an ongoing basis, Arrow is often the subject of, or a party to, various legal claims by other parties against Arrow, by Arrow against other parties, or involving Arrow, which arise in the normal course of business. Except as noted below, the various pending legal claims against Arrow will not, in the opinion of management based upon consultation with counsel, result in any material liability. Legal expenses incurred in connection with loss contingencies are expensed as incurred. As previously disclosed in certian of the Company's filings with the SEC, on June 23, 2023, Robert C. Ashe filed a putative class action complaint (the "Ashe Lawsuit") against the Company in the United States District Court for the Northern District of New York. In addition to the Company, the complaint names as defendants Thomas J. Murphy, the Company’s former CEO and from September 30, 2022 to February 20, 2023, its interim CFO, Edward J. Campanella, the Company’s former CFO, and Penko Ivanov, the Company’s current CFO (“Individual Defendants” and, together with the Company, the "Defendants"). The complaint alleges that the Defendants made materially false and misleading statements regarding the Company’s business, operations and compliance policies in the Company’s public filings between March 12, 2022 and May 12, 2023. The complaint further alleges that the Individual Defendants are liable for these materially false and misleading statements as "controlling persons" of the Company. Based on these allegations, the complaint brings two claims for violations of Section 10(b) of the Exchange Act and Rule 10b-5 promulgated thereunder and of Section 20(a) of the Exchange Act. Mr. Ashe, on behalf of a purported class of shareholders, seeks compensatory damages as well as recovery of the costs and fees associated with the litigation. On December 5, 2023, plaintiff Ashe filed an amended complaint that changed the putative class period to the period from August 5, 2022 through May 12, 2023, but challenged substantially the same statements on the same basis. On February 9, 2024, the Company moved to dismiss the action in its entirety. On April 22, 2024, the parties reached an agreement in principle to settle the matter, subject to final documentation and court approval. Management believes that the terms of the proposed settlement will not have a material adverse impact on the Company's financial results. In the event that the parties are not able to finalize a settlement, the Company intends to continue to vigorously defend against the claims asserted in the Ashe Lawsuit. On December 12, 2023 the Company become aware that Stephen Bull filed a complaint (the "Shareholder Derivative Complaint") on behalf of Arrow against the three individual defendants in the Ashe Lawsuit as well as against all members of Arrow’s board of directors during the class period in Ashe. The Company is named solely as a nominal defendant in the action and would be the beneficiary of any recovery. The Shareholder Derivative Complaint alleges breaches of fiduciary duty (i) by the Ashe individual defendants based on substantially the same allegedly misleading statements pleaded in the Ashe complaint; and (ii) the director defendants by failing adequately to oversee the individual defendants and maintain internal and disclosure controls. Plaintiffs seek (i) unspecified damages (which would be payable to the Company) for costs incurred as a result of the alleged misstatements, including costs of investigation, remediation, and litigation, (ii) repayment of the director defendants’ compensation on an unjust enrichment theory, and (iii) an order directing the Company to take all necessary actions to reform and improve its corporate governance, and (iv) the recovery of costs and fees associated with the litigation. The Shareholder Derivative Complaint also asserts various federal securities claims based on the same alleged misrepresentations as set forth in the Ashe Lawsuit. On March 5, 2024, the parties filed a stipulation under which the defendants accepted service and the case will be stayed pending disposition of the motion to dismiss filed in the Ashe Lawsuit. The Company intends to continue to vigorously defend itself against the Shareholder Derivative Complaint.

Comprehensive Income

Comprehensive Income	3 Months Ended
	Mar. 31, 2024
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Comprehensive Income	COMPREHENSIVE INCOME (In Thousands) The following table presents the components of other comprehensive income for the three month periods ended March 31, 2024 and 2023: Schedule of Comprehensive Income Three Months Ended March 31 Tax Before-Tax Benefit Net-of-Tax Amount (Expense) Amount 2024 Net Unrealized Securities Holding Loss on Securities Available-for-Sale Arising During the Period $ (2,062) $ 532 $ (1,530) Net Unrealized Gain on Cash Flow Swap 3,221 (831) 2,390 Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense (213) 55 (158) Amortization of Net Retirement Plan Actuarial Gain (66) 16 (50) Amortization of Net Retirement Plan Prior Service Cost 69 (19) 50 Other Comprehensive Income $ 949 $ (247) $ 702 2023 Net Unrealized Securities Holding Gain on Securities Available-for-Sale Arising During the Period $ 8,219 $ (2,120) $ 6,099 Net Unrealized Loss on Cash Flow Swap (800) 207 (593) Reclassification of Net Unrealized Loss on Cash Flow Hedge Agreements to Interest Expense 198 (51) 147 Amortization of Net Retirement Plan Actuarial Gain (25) 7 (18) Amortization of Net Retirement Plan Prior Service Cost 52 (15) 37 Other Comprehensive Income $ 7,644 $ (1,972) $ 5,672 The following table presents the changes in accumulated other comprehensive (loss) income by component: Changes in Accumulated Other Comprehensive (Loss) Income by Component (1) Unrealized Loss on Available-for-Sale Securities Unrealized Gain on Cash Flow Swap Defined Benefit Plan Items Total Net Actuarial Loss Net Prior Service Cost For the quarter-to-date periods ended: December 31, 2023 $ (31,648) $ 1,711 $ (2,839) $ (640) $ (33,416) Other comprehensive income or loss before reclassifications (1,530) 2,390 — — 860 Amounts reclassified from accumulated other comprehensive income or loss — (158) (50) 50 (158) Net current-period other comprehensive income or loss (1,530) 2,232 (50) 50 702 March 31, 2024 $ (33,178) $ 3,943 $ (2,889) $ (590) $ (32,714) December 31, 2022 $ (48,841) $ 4,054 $ (4,467) $ (401) $ (49,655) Other comprehensive income or loss before reclassifications 6,099 (593) — — 5,506 Amounts reclassified from accumulated other comprehensive income or loss — 147 (18) 37 166 Net current-period other comprehensive income or loss 6,099 (446) (18) 37 5,672 March 31, 2023 $ (42,742) $ 3,608 $ (4,485) $ (364) $ (43,983) (1) All amounts are net of tax. The following table presents the reclassifications out of accumulated other comprehensive income or loss: Reclassifications Out of Accumulated Other Comprehensive Income or Loss Details about Accumulated Other Comprehensive Income or Loss Components Amounts Reclassified from Accumulated Other Comprehensive Income or Loss Affected Line Item in the Statement Where Net Income Is Presented For the quarter-to-date periods ended: March 31, 2024 Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense $ 213 Interest expense Amortization of defined benefit pension items: Prior-service costs (69) (1) Salaries and Employee Benefits Actuarial gain 66 (1) Salaries and Employee Benefits 210 Total before Tax (52) Provision for Income Taxes Total reclassifications for the period $ 158 Net of Tax March 31, 2023 Reclassification of Net Unrealized Loss on Cash Flow Hedge Agreements to Interest Expense $ (198) Interest expense Amortization of defined benefit pension items: Prior-service costs $ (52) (1) Salaries and Employee Benefits Actuarial gain 25 (1) Salaries and Employee Benefits (225) Total before Tax 59 Provision for Income Taxes Total reclassifications for the period $ (166) Net of Tax (1) These accumulated other comprehensive gain or loss components are included in the computation of net periodic pension cost.

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION (Dollars In Thousands, Except Share and Per Share Amounts) Arrow has established three stock-based compensation plans: a Long Term Incentive Plan, an Employee Stock Purchase Plan (ESPP) and an Employee Stock Ownership Plan (ESOP). All share and per share data have been adjusted for the September 26, 2023 3% stock dividend. Long Term Incentive Plan The Long Term Incentive Plan provides for the grant of incentive stock options, non-qualified stock options, restricted stock, restricted stock units, performance units and performance shares. The Compensation Committee of the Board of Directors administers the Long Term Incentive Plan. Stock Options - Options may be granted at a price no less than the greater of the par value or fair market value of such shares on the date on which such option is granted, and generally expire ten years from the date of grant. The options usually vest over a four-year period. The following table summarizes information about stock option activity for the year to date period ended March 31, 2024: Shares Weighted Average Exercise Price Outstanding at January 1, 2024 305,308 $ 28.96 Exercised (6,060) 18.97 Forfeited (7,979) 25.81 Outstanding at March 31, 2024 291,269 29.25 Vested at Period-End 230,561 28.65 Expected to Vest 60,708 31.54 The following table presents information on the amounts expensed related to stock options for the three month periods ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Amount expensed $ 78 $ 85 Restricted Stock Units - Historically, the Company has granted restricted stock units which give the recipient the right to receive shares of Company stock upon vesting. The fair value of each restricted stock unit is the market value of Company stock on the date of grant. 100% of the restricted stock unit awards vest three years from the grant date, unless vested or forfeited prior to vesting in accordance with the terms of the award. Once vested, the restricted stock units are no longer forfeitable. Vested units settle upon retirement, as defined in the Arrow retirement plan, of the recipient. Unvested restricted stock unit awards will generally be forfeited if the recipient ceases to be employed by the Company, with limited exceptions. There was no RSU activity for the three month period ended March 31, 2024 and there were no non-vested restricted stock units at any time during the three month period ended March 31, 2024. The following table summarizes information about restricted stock unit activity for the three month period ended March 31, 2023: Restricted Stock Units Weighted Average Grant Date Fair Value Non-vested at January 1, 2023 13,925 30.47 Granted 5,164 31.47 Vested (4,307) 31.35 Non-vested at March 31, 2023 14,782 30.56 The following table presents information on the amounts expensed related to restricted stock units for the periods ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Amount expensed $ — $ 37 Employee Stock Purchase Plan In April 2023, Arrow suspended the operation of the prior ESPP (the "Prior ESPP") as a result of the now resolved delay in filing the Annual Report on Form 10-K for the year ended December 21, 2022 (the "2022 Form 10-K") and the Quarterly Report on Form 10-Q for the quarter ended March 31, 2023 (the "2023 Q1 Form 10-Q") and the related effects under applicable securities laws. In October 2023, the Board of Directors approved the adoption of a new ESPP intended to satisfy the requirements of Section 423 of the Internal Revenue Code, which was effective January 1, 2024 (the "Qualified ESPP"). Under the Qualified ESPP, the amount of the discount is 10%. Under the Prior ESPP, participating employees purchased Arrow's common stock at a 5% discount below market price. Under current accounting guidance, a stock purchase plan with a discount of 5% or less is not considered a compensatory plan. The Qualified ESPP is considered a compensatory plan. The Qualified ESPP will be submitted to the Arrow shareholders for approval at the next annual meeting of shareholders on June 5, 2024. In the event the shareholders of the Company do not approve the Qualified ESPP at the annual meeting: (i) the Qualified ESPP shall immediately terminate; (ii) all amounts contributed by each participant in the Qualified ESPP which have not been used to purchase shares of the Company's common stock will be returned to such participant as soon as practicable; and (iii) purchases under the Qualified ESPP made from the January 1, 2024 inception date through the date of termination of the Qualified ESPP shall not be treated as purchased pursuant to an employee stock purchase plan that satisfies Section 423 of the Code and participants would not qualify for favorable tax treatment of such purchases. Employee Stock Ownership Plan Arrow maintains an ESOP, pursuant to which substantially all employees of Arrow and its subsidiaries are eligible to participate upon satisfaction of applicable service requirements. The Company may make, and historically has made, an cash contribution to the ESOP each year.

Retirement Benefit Plans

Retirement Benefit Plans	3 Months Ended
	Mar. 31, 2024
Retirement Benefits [Abstract]
Retirement Benefit Plans	RETIREMENT BENEFIT PLANS (Dollars in Thousands) Arrow sponsors qualified and non-qualified defined benefit pension plans and other postretirement benefit plans for its employees. Arrow maintains a non-contributory pension plan, which covers substantially all employees. Effective December 1, 2002, all active participants in the qualified defined benefit pension plan were given a one-time irrevocable election to continue participating in the traditional plan design, for which benefits were based on years of service and the participant’s final compensation (as defined), or to begin participating in the new cash balance plan design. All employees who first participate in the plan after December 1, 2002 automatically participate in the cash balance plan design. The interest credits under the cash balance plan are based on the 30-year U.S. Treasury rate in effect for November of the prior year with a minimum interest credit of 3%. The service credits under the cash balance plan are equal to 6.0% of eligible salaries for employees who become participants on or after January 1, 2003. For employees in the plan prior to January 1, 2003, the service credits are scaled based on the age of the participant, and range from 6.0% to 12.0%. The funding policy is to contribute up to the maximum amount that can be deducted for federal income tax purposes and to make all payments required under The Employee Retirement Income Security Act (ERISA). Arrow also maintains a supplemental non-qualified unfunded retirement plan to provide eligible employees of Arrow and its subsidiaries with benefits in excess of qualified plan limits imposed by federal tax law. Arrow has multiple non-pension postretirement benefit plans. The health care, dental and life insurance plans are contributory, with participants’ contributions adjusted annually. Arrow’s policy is to fund the cost of postretirement benefits based on the current cost of the underlying policies. However, the health care plan provision allows for grandfathered participants to receive automatic increases of Company contributions each year based on the increase in inflation, limited to a maximum of 5%. As of December 31, 2023, Arrow uses the sex-distinct Amount-Weighted Pri-2012 Mortality Tables for employees, healthy retirees and contingent survivors, with mortality improvements projected using Scale MP-2021 on a generational basis for the Pension Plan and the sex-distinct Amount-Weighted White Collar Pri-2012 Mortality Tables for employees, healthy retirees and contingent survivors, with mortality improvements projected using Scale MP-2021 on a generational basis for the Select Executive Retirement Plan (the "SERP"). Segment interest rates of 5.50%, 5.76%, 5.83% were used in determining the present value of a lump sum payment/annuitizing cash balance accounts as of December 31, 2023. Effective January 1, 2021, GFNB amended the Arrow Financial Corporation Employees' Pension Plan (the "Plan"). The Plan change was adopted January 1, 2021 and the amendment was valued as of December 31, 2020. The Plan amendment was as follows: Effective January 1, 2021, the benefit payable to or on behalf of each participant: • whose employment with the Employer (or any predecessor Employer, except as noted below) terminated on or before • who satisfied the requirements for early, normal, or late retirement as of such termination; • who never participated in the United Vermont Bancorporation Plan; and • who is, or whose beneficiary is, receiving monthly benefit payments from the Plan as of January 1, 2021 (including a The foregoing increase was applied to the monthly benefit actually payable to the participant, or to the participant's beneficiary, as of January 1, 2021, determined after all applicable adjustments, regardless of whether such benefit had been determined under the Company's plan or the plan of a predecessor employer that had been merged into the Plan. The plan amendment caused a $351,638 increase in the projected benefit obligation, creating a positive service cost which will be amortized over 9.70 years (the average expected future service of active plan participants.) Effective January 1, 2021, GFNB amended the Arrow Financial Corporation Employees' SERP. The plan change was adopted January 1, 2021 and the amendment was valued as of December 31, 2020. The plan amendment provides a special adjustment to the monthly benefit payment for certain retirees. The plan amendment caused a $122,797 increase in the projected benefit obligation, creating a positive prior service cost which will be amortized over 12.5 years. Settlement accounting is required when lump sum payments during a fiscal year exceed that fiscal year's Service Cost plus Interest Cost components of the Net Periodic Pension Cost. For 2022, the sum of the Service Cost and Interest Cost was $3.3 million and the 2022 total lump sum payments exceeded that amount. The Plan therefore recognized in the 2022 Net Periodic Pension Cost a portion of the Unamortized Net (Gain)/Loss equal to the ratio of the projected benefit obligation for the participants that received a lump sum to the total projected benefit obligation. As of December 31, 2022, the Unamortized Net Loss prior to reflecting settlement accounting was $7.2 million. The ratio of the projected benefit obligation for participants that received a lump sum to the total projected benefit obligation was 8.06%. The effect of the settlement that was recognized in the 2022 Net Periodic Pension Cost was $577 thousand, which was fully reflected in the 2022 Net Periodic Cost. Settlement accounting was not required for the the year ended December 31, 2023 or for the three-month period ended March 31, 2024. The following tables provide the components of net periodic benefit costs for the three-month periods ended March 31, 2024 and 2023: Employees' Select Executive Postretirement Pension Retirement Benefit Plan Plan Plans Net Periodic Benefit Cost For the Three Months Ended March 31, 2024: Service Cost 1 $ 466 $ 17 $ 15 Interest Cost 2 525 158 81 Expected Return on Plan Assets 2 (932) — — Amortization of Prior Service Cost 2 33 10 26 Amortization of Net Loss (Gain) 2 — 21 (87) Net Periodic Cost $ 92 $ 206 $ 35 Plan Contributions During the Period $ — $ 127 $ 27 For the Three Months Ended March 31, 2023: Service Cost 1 $ 413 $ 163 $ 18 Interest Cost 2 530 62 87 Expected Return on Plan Assets 2 (857) — — Amortization of Prior Service Cost 2 16 10 26 Amortization of Net Loss (Gain) 2 36 18 (79) Net Periodic Cost $ 138 $ 253 $ 52 Plan Contributions During the Period $ — $ 116 $ 27 Estimated Future Contributions in the Current Fiscal Year $ — $ 382 $ 82 Footnotes: 1. Included in Salaries and Employee Benefits on the Consolidated Statements of Income 2. Included in Other Operating Expense on the Consolidated Statements of Income

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Earnings Per Common Share	EARNINGS PER COMMON SHARE (In Thousands, Except Per Share Amounts) The following table presents a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per common share (EPS) for periods ended March 31, 2024 and 2023. When applicable, share and per share amounts have been adjusted for the September 26, 2023, 3% stock dividend. Earnings Per Share Three Months Ended March 31, 2024 March 31, 2023 Earnings Per Share - Basic: Net Income $ 7,660 $ 8,562 Weighted Average Shares - Basic 16,865 17,048 Earnings Per Share - Basic $ 0.45 $ 0.50 Earnings Per Share - Diluted: Net Income $ 7,660 $ 8,562 Weighted Average Shares - Basic 16,865 17,048 Dilutive Average Shares Attributable to Stock Options 2 12 Weighted Average Shares - Diluted 16,867 17,060 Earnings Per Share - Diluted $ 0.45 $ 0.50

Fair Values

Fair Values	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Values	FAIR VALUES (Dollars In Thousands) Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Subtopic 820-10 defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. There are no nonfinancial assets or liabilities measured at fair value on a recurring basis. The only assets or liabilities that Arrow measured at fair value on a recurring basis at March 31, 2024, December 31, 2023 and March 31, 2023 were AFS securities, equity securities and derivatives. Arrow held no securities or liabilities for trading on such dates. The table below presents the financial instrument's fair value and the amounts within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement: Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis Fair Value Measurements at Reporting Date Using: Fair Value Quoted Prices Significant Other Significant Unobservable Inputs Fair Value of Assets and Liabilities Measured on a Recurring Basis: March 31, 2024 Assets: Securities Available-for Sale: U.S. Treasuries $ 74,152 $ — $ 74,152 $ — U.S. Government & Agency Obligations 152,749 — 152,749 $ — State and Municipal Obligations 280 — 280 — Mortgage-Backed Securities 257,717 — 257,717 — Corporate and Other Debt Securities 935 — 935 — Total Securities Available-for-Sale 485,833 — 485,833 — Equity Securities 1,942 — 1,942 — Total Securities Measured on a Recurring Basis 487,775 — 487,775 — Derivative Assets 12,747 — 12,747 — Total Measured on a Recurring Basis $ 500,522 $ — $ 500,522 $ — Liabilities: Derivative Liabilities 7,317 — 7,317 — Total Measured on a Recurring Basis $ 7,317 $ — $ 7,317 $ — December 31, 2023 Assets: Securities Available-for Sale: U.S. Treasuries $ 74,004 $ — $ 74,004 $ — U.S. Government & Agency Obligations $ 152,925 $ — $ 152,925 $ — State and Municipal Obligations 280 — 280 — Mortgage-Backed Securities 269,760 — 269,760 — Corporate and Other Debt Securities 800 — 800 — Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis Fair Value Measurements at Reporting Date Using: Fair Value Quoted Prices Significant Other Significant Unobservable Inputs Total Securities Available-for-Sale 497,769 — 497,769 — Equity Securities 1,925 — 1,925 — Total Securities Measured on a Recurring Basis 499,694 — 499,694 — Derivative Assets 12,057 — 12,057 — Total Measured on a Recurring Basis $ 511,751 $ — $ 511,751 $ — Liabilities: Derivative Liabilities $ 9,598 — $ 9,598 — Total Measured on a Recurring Basis $ 9,598 $ — $ 9,598 $ — March 31, 2023 Assets: Securities Available-for Sale: U.S. Government & Agency Obligations $ 177,585 $ — $ 177,585 $ — State and Municipal Obligations 320 — 320 — Mortgage-Backed Securities 386,988 — 386,988 — Corporate and Other Debt Securities 800 — 800 — Total Securities Available-for-Sale 565,693 — 565,693 — Equity Securities 2,070 — 2,070 — Total Securities Measured on a Recurring Basis 567,763 — 567,763 — Derivative Assets 6,206 — 6,206 — Total Measured on a Recurring Basis $ 573,969 $ — $ 573,969 $ — Liabilities: Derivative Liabilities 6,206 — 6,206 — Total Measured on a Recurring Basis $ 6,206 $ — $ 6,206 $ — Fair Value Quoted Prices Significant Other Significant Unobservable Inputs Gains (Losses) Recognized in Earnings Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis: March 31, 2024 Collateral Dependent Evaluated Loans $ — $ — $ — $ — Other Real Estate Owned and Repossessed Assets, Net 312 — — 312 — December 31, 2023 Collateral Dependent Impaired Loans $ — $ — $ — $ — Other Real Estate Owned and Repossessed Assets, Net 312 — — 312 — March 31, 2023 Collateral Dependent Impaired Loans $ — $ — $ — $ — Other Real Estate Owned and Repossessed Assets, Net 144 — — 144 — The fair value of financial instruments is determined under the following hierarchy: • 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 active markets, quoted prices for identical or 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; and, • Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity). Fair Value Methodology for Assets and Liabilities Measured on a Recurring Basis The fair value of Level 1 AFS securities are based on unadjusted, quoted market prices from exchanges in active markets. The fair value of Level 2 AFS securities are based on an independent bond and equity pricing service for identical assets or significantly similar securities and an independent equity pricing service for equity securities not actively traded. The pricing services use a variety of techniques to arrive at fair value including market maker bids, quotes and pricing models. Inputs to the pricing models include recent trades, benchmark interest rates, spreads and actual and projected cash flows. The fair value of Level 2 equities are based on the last observable price in open markets. The fair value of Level 2 equities are based on the last observable price in open markets. The fair value of Level 2 derivatives is determined using inputs that are observable in the market place obtained from third parties including yield curves, publicly available volatilities, and floating indexes. Fair Value Methodology for Assets and Liabilities Measured on a Nonrecurring Basis The fair value of collateral dependent evaluated loans and other real estate owned was based on third-party appraisals less estimated cost to sell. The appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. Other assets which might have been included in this table include mortgage servicing rights, goodwill and other intangible assets. Arrow evaluates each of these assets for impairment at least annually, with no impairment recognized for these assets at March 31, 2024, December 31, 2023 and March 31, 2023. Fair Value by Balance Sheet Grouping The following table presents a summary of the carrying amount, the fair value (exit price) or an amount approximating fair value and the fair value hierarchy of Arrow’s financial instruments: Schedule of Fair Values by Balance Sheet Grouping Fair Value Hierarchy Carrying Value Fair Value Level 1 Level 2 Level 3 March 31, 2024 Cash and Cash Equivalents $ 282,465 $ 282,465 $ 282,465 $ — $ — Securities Available-for-Sale 485,833 485,833 — 485,833 — Securities Held-to-Maturity 128,051 124,861 — 124,861 — Equity Securities 1,942 1,942 — 1,942 — Federal Home Loan Bank and Federal 4,208 4,208 — 4,208 — Net Loans 3,227,197 2,978,789 — — 2,978,789 Accrued Interest Receivable 12,754 12,754 — 12,754 — Derivative Assets 12,747 12,747 12,747 Deposits 3,779,021 3,774,378 — 3,774,378 — Borrowings 106,500 105,941 — 105,941 — Junior Subordinated Obligations Issued 20,000 20,000 — 20,000 — Accrued Interest Payable 7,996 7,996 — 7,996 — Derivative Liabilities 7,317 7,317 — 7,317 — Schedule of Fair Values by Balance Sheet Grouping Fair Value Hierarchy Carrying Value Fair Value Level 1 Level 2 Level 3 December 31, 2023 Cash and Cash Equivalents $ 142,536 $ 142,536 $ 142,536 $ — $ — Securities Available-for-Sale 497,769 497,769 — 497,769 — Securities Held-to-Maturity 131,395 128,837 — 128,837 — Equity Securities 1,925 1,925 1,925 Federal Home Loan Bank and Federal 5,049 5,049 — 5,049 — Net Loans 3,181,643 2,940,318 — — 2,940,318 Accrued Interest Receivable 11,076 11,076 — 11,076 — Derivative Assets 12,057 12,057 — 12,057 — Deposits 3,687,566 3,683,122 — 3,683,122 — Borrowings 26,500 26,189 — 26,189 — Junior Subordinated Obligations Issued 20,000 20,000 — 20,000 — Accrued Interest Payable 6,289 6,289 — 6,289 — Derivative Liabilities 9,598 9,598 — 9,598 — March 31, 2023 Cash and Cash Equivalents $ 203,472 $ 203,472 $ 203,472 $ — $ — Securities Available-for-Sale 565,693 565,693 — 565,693 — Securities Held-to-Maturity 167,347 164,439 — 164,439 — Equity Securities 2,070 2,070 — 2,070 Federal Home Loan Bank and Federal 10,027 10,027 — 10,027 — Net Loans 2,974,568 2,705,312 — — 2,705,312 Accrued Interest Receivable 9,857 9,857 — 9,857 — Derivative Assets 6,206 6,206 — 6,206 — Deposits 3,546,349 3,540,854 — 3,540,854 — Borrowings 107,800 107,830 — 107,830 — Junior Subordinated Obligations Issued 20,000 20,000 — 20,000 — Accrued Interest Payable 1,170 1,170 — 1,170 — Derivative Liabilities 6,206 6,206 — 6,206 —

Leases

Leases	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Leases	LEASES (Dollars In Thousands) Arrow is a lessee in its leases, which are mainly for financial services locations in addition to leases for corporate vehicles. These leases generally require Arrow to pay third-party expenses on behalf of the Lessor, which are referred to as variable payments. Under some leases, Arrow pays the variable payments to the lessor, and in other leases, Arrow pays the variable payments directly to the applicable third party. None of Arrow's current leases include any residual value guarantees or any subleases, and there are no significant rights and obligations of Arrow for leases that have not commenced as of the reporting date. Arrow leases two of its branch offices, at market rates, from Stewart’s Shops Corp. Mr. Gary C. Dake, President of Stewart’s Shops Corp., serves as a Director on the Board of Directors of Arrow and its two subsidiary banks. The following includes quantitative data related to Arrow's leases as of and for the three months ended March 31, 2024 and March 31, 2023: Three Months Ended Finance Lease Amounts: Classification March 31, 2024 March 31, 2023 Right-of-Use Assets Premises and Equipment, Net $ 4,416 $ 4,593 Lease Liabilities Finance Leases 5,053 5,106 Operating Lease Amounts: Right-of-Use Assets Other Assets $ 4,790 $ 5,388 Lease Liabilities Other Liabilities 4,997 5,584 Other Information: Cash Paid For Amounts Included In The Measurement Of Lease Liabilities: Operating Outgoing Cash Flows From Finance Leases $ 48 $ 49 Operating Outgoing Cash Flows From Operating Leases 155 257 Financing Outgoing Cash Flows From Finance Leases 13 13 Right-of-Use Assets Obtained In Exchange For New Finance Lease Liabilities — — Right-of-Use Assets Obtained In Exchange For New Operating Lease Liabilities — 19 Weighted-average Remaining Lease Term - Finance Leases (Yrs.) 26.04 27.00 Weighted-average Remaining Lease Term - Operating Leases (Yrs.) 11.06 11.45 Weighted-average Discount Rate—Finance Leases 3.75 % 3.75 % Weighted-average Discount Rate—Operating Leases 3.10 % 2.97 % Lease cost information for Arrow's leases is as follows: Three Months Ended March 31, 2024 March 31, 2023 Lease Cost: Finance Lease Cost: Reduction of Right-of-Use Assets $ 44 $ 44 Interest on Lease Liabilities 48 49 Operating Lease Cost 195 298 Short-term Lease Cost 10 14 Variable Lease Cost 75 73 Total Lease Cost $ 372 $ 478 Future Lease Payments at March 31, 2024 are as follows: Operating Leases Financing Leases Twelve Months Ended: 3/31/2025 $ 720 $ 254 3/31/2026 671 264 3/31/2027 607 268 3/31/2028 537 268 3/31/2029 489 268 Thereafter 2,967 6,929 Total Undiscounted Cash Flows $ 5,991 $ 8,251 Less: Net Present Value Adjustment 994 3,198 Lease Liability $ 4,997 $ 5,053
Leases	LEASES (Dollars In Thousands) Arrow is a lessee in its leases, which are mainly for financial services locations in addition to leases for corporate vehicles. These leases generally require Arrow to pay third-party expenses on behalf of the Lessor, which are referred to as variable payments. Under some leases, Arrow pays the variable payments to the lessor, and in other leases, Arrow pays the variable payments directly to the applicable third party. None of Arrow's current leases include any residual value guarantees or any subleases, and there are no significant rights and obligations of Arrow for leases that have not commenced as of the reporting date. Arrow leases two of its branch offices, at market rates, from Stewart’s Shops Corp. Mr. Gary C. Dake, President of Stewart’s Shops Corp., serves as a Director on the Board of Directors of Arrow and its two subsidiary banks. The following includes quantitative data related to Arrow's leases as of and for the three months ended March 31, 2024 and March 31, 2023: Three Months Ended Finance Lease Amounts: Classification March 31, 2024 March 31, 2023 Right-of-Use Assets Premises and Equipment, Net $ 4,416 $ 4,593 Lease Liabilities Finance Leases 5,053 5,106 Operating Lease Amounts: Right-of-Use Assets Other Assets $ 4,790 $ 5,388 Lease Liabilities Other Liabilities 4,997 5,584 Other Information: Cash Paid For Amounts Included In The Measurement Of Lease Liabilities: Operating Outgoing Cash Flows From Finance Leases $ 48 $ 49 Operating Outgoing Cash Flows From Operating Leases 155 257 Financing Outgoing Cash Flows From Finance Leases 13 13 Right-of-Use Assets Obtained In Exchange For New Finance Lease Liabilities — — Right-of-Use Assets Obtained In Exchange For New Operating Lease Liabilities — 19 Weighted-average Remaining Lease Term - Finance Leases (Yrs.) 26.04 27.00 Weighted-average Remaining Lease Term - Operating Leases (Yrs.) 11.06 11.45 Weighted-average Discount Rate—Finance Leases 3.75 % 3.75 % Weighted-average Discount Rate—Operating Leases 3.10 % 2.97 % Lease cost information for Arrow's leases is as follows: Three Months Ended March 31, 2024 March 31, 2023 Lease Cost: Finance Lease Cost: Reduction of Right-of-Use Assets $ 44 $ 44 Interest on Lease Liabilities 48 49 Operating Lease Cost 195 298 Short-term Lease Cost 10 14 Variable Lease Cost 75 73 Total Lease Cost $ 372 $ 478 Future Lease Payments at March 31, 2024 are as follows: Operating Leases Financing Leases Twelve Months Ended: 3/31/2025 $ 720 $ 254 3/31/2026 671 264 3/31/2027 607 268 3/31/2028 537 268 3/31/2029 489 268 Thereafter 2,967 6,929 Total Undiscounted Cash Flows $ 5,991 $ 8,251 Less: Net Present Value Adjustment 994 3,198 Lease Liability $ 4,997 $ 5,053

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (In Thousands) Arrow is exposed to certain risks arising from both its business operations and economic conditions. Arrow principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. Arrow manages economic risks, including interest rate, primarily by managing the amount, sources and duration of its assets and liabilities and through the use of derivative instruments. Specifically, Arrow enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. Arrow's derivative financial instruments are used to manage differences in the amount, timing and duration of known or expected cash receipts and its known or expected cash payments principally related to certain fixed rate borrowings. Arrow also has interest rate derivatives that result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in Arrow's assets or liabilities. Arrow's goal is to have a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions. Derivatives Not Designated as Hedging Instruments Arrow enters into interest rate swap agreements with its commercial customers to provide them with a long-term fixed rate, while simultaneously entering into offsetting interest rate swap agreements with a counterparty to swap the fixed rate to a variable rate to manage interest rate exposure. These interest rate swap agreements are not designated as a hedge for accounting purposes. As the interest rate swap agreements have substantially equivalent and offsetting terms, they do not present material exposure to Arrow's consolidated statements of income. Arrow records its interest rate swap agreements at fair value and is presented on a gross basis within other assets and other liabilities on the consolidated balance sheets. Changes in the fair value of assets and liabilities arising from these derivatives are included, net, in other income in the consolidated statement of income. The following table depicts the fair value adjustment recorded related to the notional amount of derivatives, not designated as hedging instruments, outstanding as well as the notional amount of the interest rate swap agreements: Derivatives Not Designated as Hedging Instruments - Interest Rate Swap Agreements March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other assets $ 6,111 $ 6,208 $ 6,206 Fair value adjustment included in other liabilities 6,111 6,208 6,206 Notional amount 107,991 123,197 126,637 Derivatives Designated as Hedging Instruments Arrow entered into two pay-fixed portfolio layer method ("PLM") fair value swaps, designated as hedging instruments, with a total notional amount of $250 million and $50 million, respectively, in the third quarter of 2023. Arrow is designating the fair value swaps under PLM. Under PLM, the hedged items are designated as hedged layers of a closed portfolio of financial loans that are anticipated to remain outstanding for the designated hedged period. Adjustments will be made to record the swaps at fair value on the Consolidated Balance Sheets, with changes in fair value recognized in interest income. The carrying value of the fair value swaps on the Consolidated Balance Sheets will also be adjusted through interest income, based on changes in fair value attributable to changes in the hedged risk. The following table depicts the fair value adjustment recorded related to the notional amount of derivatives, designed as hedging instruments, outstanding as well as the notional amount of the interest rate swap agreements: Derivatives Designated as Hedging Instruments - Fair Value Agreements March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other assets $ — $ — $ — Fair value adjustment included in other liabilities 1,109 5,678 — Notional amount 300,000 300,000 — The following table summarizes the effect of the fair value hedging relationship recognized on the unaudited interim consolidated statement of income: Derivatives Designated as Hedging Instruments - Fair Value Agreements Three Months Ended Twelve Months Ended Three Months Ended March 31, 2024 December 31, 2023 March 31, 2023 Hedged Asset $ 1,243 $ 5,849 $ — Fair value derivative designated as hedging instrument (1,255) (5,828) — Total (loss) gain recognized in the consolidated statements of income with interest and fees on loans (12) 21 — The following table represents the carrying value of the PLM hedged assets and the cumulative fair value hedging adjustment included in the carrying value of the hedged asset: Derivatives Designated as Hedging Instruments - Fair Value Swap Agreements March 31, 2024 December 31, 2023 March 31, 2023 Carrying Value of Portfolio Layer Method Hedged Asset $ 301,243 $ 305,849 $ — Cumulative Fair Value Hedging Adjustment 1,243 5,849 — In the fourth quarter of 2023, Arrow entered into two interest rate swaps, designated as hedging instruments, to add stability to interest expense and to manage its exposure to the variability of the future cash flows attributable to the contractually specified interest rates. The notional amounts were $100 million and $75 million, respectively. Arrow entered into pay-fixed interest rate swaps to convert rolling 90 days brokered deposits. For derivatives that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in Accumulated Other Comprehensive Income ("AOCI") and subsequently reclassified into interest expense in the same period during which the hedge transaction affects earnings. The following table indicates the effect of cash flow hedge accounting on AOCI and on the consolidated statement of income. Derivatives Designated as Hedging Instruments - Cash Flow Hedge Agreements March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other liabilities $ 97 $ 2,710 $ — Amount of gain (loss) recognized in AOCI 3,068 (2,553) — Amount of gain reclassified from AOCI interest expense 455 157 — In addition, Arrow has entered into interest rate swaps to synthetically fix the variable rate interest payments associated with $20 million in outstanding subordinated trust securities. These agreements are designated as cash flow hedges. For derivatives that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in AOCI and subsequently reclassified into interest expense in the same period during which the hedge transaction affects earnings. Amounts reported in AOCI related to derivatives will be reclassified to interest expense as interest payments are made on Arrow's Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts borrowings. The following table indicates the effect of cash flow hedge accounting on AOCI and on the consolidated statement of income. Derivatives Designated as Hedging Instruments - Cash Flow Hedge Agreements Three Months Ended Twelve Months Ended Three Months Ended March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other assets $ 5,393 $ 4,998 $ 4,843 Amount of gain (loss) recognized in AOCI $ 153 $ (1,355) $ (800) Amount of loss reclassified from AOCI to interest expense (242) (907) (198)

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	$ 7,660	$ 8,562

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

Accounting Policies (Policies)

Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Management's Use of Estimates	Management’s Use of Estimates The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of income and expenses during the reporting period. Management utilized estimates and assumptions in its evaluation of potential impairment of Arrow's right-of-use lease assets, goodwill and intangible assets. Our most significant estimate is the allowance for credit losses. Other estimates include the fair value of financial instruments, evaluation of pension and other post-retirement liabilities, an analysis of a need for a valuation allowance for deferred tax assets and a reserve for unfunded loan commitments recorded as an other liability. Actual results could differ from those estimates. A material estimate that is particularly susceptible to significant change in the near term is the allowance for credit losses. In connection with the determination of the allowance for credit losses management obtains economic forecasts from reliable sources and appraisals for properties. The allowance for credit losses is management’s best estimate of the life of loan losses as of the balance sheet date. While management uses available information to recognize losses on loans, future adjustments to the allowance for credit losses may be necessary based on changes in economic conditions.
Allowance for Credit Losses	Allowance for Credit Losses – Loans - Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (CECL) approach requires an estimate of the credit losses expected over the life of a loan (or pool of loans). It replaces the incurred loss approach’s threshold that required the recognition of a credit loss when it was probable that a loss event was incurred. The allowance for credit losses is a valuation account that is deducted from, or added to, the loans’ amortized cost basis to present the net lifetime amount expected to be collected on the loans. Credit losses are charged off against the allowance when management believes a loan balance is confirmed to be uncollectible. Expected recoveries do not exceed the aggregate of amounts previously charged off and expected to be charged off. Management estimates the allowance using relevant available information from internal and external sources related to past events, current conditions, and a reasonable and supportable single economic forecast. Historical credit loss experience provides the basis for the estimation of expected credit losses. Arrow's historical loss experience was supplemented with peer information when there was insufficient loss data for Arrow. Peer selection was based on a review of institutions with comparable loss experience as well as loan yield, bank size, portfolio concentration and geography. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in credit concentrations, delinquency level, collateral values and underwriting standards as well as changes in economic conditions or other relevant factors. Management judgment is required at each point in the measurement process. Portfolio segment is defined as the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. Management developed portfolio segments for estimating loss based on type of borrower and collateral as follows: Commercial Loans Commercial Real Estate Loans Consumer Loans Residential Loans Further details related to loan portfolio segments is included in Note 5 Loans. Historical credit loss experience for both Arrow and segment-specific peers provides the basis for the estimation of expected credit losses. Arrow utilized regression analyses of peer data, of which Arrow is included, where observed credit losses and selected economic factors were utilized to determine suitable loss drivers for modeling lifetime probability of default (PD) rates. Arrow uses the discounted cash flow (DCF) method to estimate expected credit losses for the commercial, commercial real estate, and residential segments. For each of these loan segments, Arrow generates cash flow projections at the instrument level wherein payment expectations are adjusted for estimated prepayment speed, curtailments, time to recovery, PD, and segment-specific loss given default (LGD) risk factors. The modeling of expected prepayment speeds, curtailment rates, and time to recovery are based on historical internal data and adjusted, if necessary, based on the reasonable and supportable forecast of economic conditions. For the loan segments utilizing the DCF method, (commercial, commercial real estate, and residential) management utilizes externally developed economic forecast of the following economic factors as loss drivers: national unemployment, gross domestic product and Case-Shiller U.S. National Home Price Index ("HPI"). The economic forecast is applied over a reasonable and supportable forecast period. Arrow utilizes a six quarter reasonable and supportable forecast period with an eight quarter reversion to the historic mean on a straight-line basis. The combination of adjustments for credit expectations (default and loss) and timing expectations (prepayment, curtailment, and time to recovery) produces an expected cash flow stream at the instrument level. Instrument effective yield is calculated, net of the impacts of prepayment assumptions, and the instrument expected cash flows are then discounted at that effective yield to produce an instrument-level net present value of expected cash flows (NPV). An allowance for credit loss is established for the difference between the instrument’s NPV and amortized cost basis. Arrow uses the vintage analysis method to estimate expected credit losses for the consumer loan segment. The vintage method was selected since the loans within the consumer loan segment are homogeneous, not just by risk characteristic, but by loan structure. Under the vintage analysis method, a loss rate is calculated based on the quarterly net charge-offs to the outstanding loan balance for each vintage year over the lookback period. Once this periodic loss rate is calculated for each quarter in the lookback period, the periodic rates are averaged into the loss rate. The loss rate is then applied to the outstanding loan balances based on the loan's vintage year. Arrow maintains, over the life of the loan, the loss curve by vintage year. If estimated losses computed by the vintage method need to be adjusted based on current conditions and the reasonable and supportable economic forecast, these adjustments would be incorporated over a six quarter reasonable and supportable forecast period, reverting to historical losses using a straight-line method over an eight quarter period. Based on current conditions and the reasonable and supportable economic forecast, no adjustment to the loss rate for each vintage is currently required. The vintage and DCF models also consider the need to qualitatively adjust expected loss estimates for information not already captured in the quantitative loss estimation process. Qualitative considerations include limitations inherent in the quantitative model; trends experienced in nonperforming and delinquent loans; changes in value of underlying collateral; changes in lending policies and procedures; nature and composition of loans; portfolio concentrations that may affect loss experience across one or more components or the portfolio; the experience, ability and depth of lending management and staff; Arrow's credit review system; and the effect of external factors such as competition, legal and regulatory requirements. These qualitative factor adjustments may increase or decrease Arrow's estimate of expected credit losses so that the allowance for credit loss is reflective of the estimate of lifetime losses that exist in the loan portfolio at the balance sheet date. All loans not included in the vintage analysis method that exceed $250,000 which are on nonaccrual, are evaluated on an individual basis. For collateral dependent financial assets where Arrow has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and Arrow expects repayment of the financial asset to be provided substantially through the operation or sale of the collateral, Arrow has elected a practical expedient to measure the allowance for credit loss as the difference between the fair value of the collateral less cost to sell, and the amortized cost basis of the asset as of the measurement date. In the event the repayment of a collateral dependent financial asset is expected to be provided substantially through the operating of the collateral, Arrow will use fair value of the collateral at the reporting date when recording the net carrying amount of the asset and determining the allowance for credit losses. When repayment is expected to be from the sale of the collateral, expected credit losses are calculated as the amount by which the amortized cost basis of the financial asset exceeds the fair value of the underlying collateral less estimated cost to sell. The allowance for credit losses may be zero if the fair value of the collateral at the measurement date exceeds the amortized cost basis of the financial asset. As part of ASU No. 2022-02, Arrow evaluates whether the modification represents a new loan or a continuation of an existing loan, consistent with the current GAAP treatment for other loan modifications. In addition, Arrow evaluates and if necessary, discloses if loan modifications made to borrowers experiencing financial difficulty contain a financial concession. Estimated Credit Losses on Off-Balance Sheet Credit Exposures Recognized as Other Liabilities - Arrow estimates expected credit losses over the contractual period in which Arrow has exposure to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by Arrow. The allowance for credit losses on off-balance sheet credit exposures recognized in other liabilities, is adjusted as an expense in other non-interest expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over their estimated lives. Estimating credit losses on unfunded commitments requires Arrow to consider the following categories of off-balance sheet credit exposure: unfunded commitments to extend credit, unfunded lines of credit, and standby letters of credit. Each of these unfunded commitments is then analyzed for a probability of funding to calculate a probable funding amount. The life of loan loss factor by related portfolio segment from the loan allowance for credit loss calculation is then applied to the probable funding amount to calculate the estimated credit losses on off-balance sheet credit exposures recognized as other liabilities. Accrued Interest Receivable - Arrow has made the following elections regarding accrued interest receivable: (1) presented accrued interest receivable balances separately within the other assets balance sheet line item; (2) excluded interest receivable that is included in amortized cost of financing receivables from related disclosures requirements and (3) continued its policy to write off accrued interest receivable by reversing interest income. For loans, write off typically occurs upon becoming over 90 to 120 days past due and therefore the amount of such write offs are immaterial. Historically, Arrow has not experienced uncollectible accrued interest receivable on investment securities. Allowance for Credit Losses – Held-to-Maturity (HTM) Debt Securities - Arrow's HTM debt securities are also required to utilize the CECL approach to estimate expected credit losses. Management measures expected credit losses on HTM debt securities on a collective basis by major security types that share similar risk characteristics, such as financial asset type and collateral type adjusted for current conditions and reasonable and supportable forecasts. Management classifies the HTM portfolio into the following major security types: U.S. government agency or U.S. government sponsored mortgage-backed and collateralized mortgage obligations securities, and state and municipal debt securities. The mortgage-backed and collateralized mortgage obligations HTM securities are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government as to timely repayment of principal and interest, are highly rated by major rating agencies, and have a long history of no credit losses. Therefore, Arrow did not record a credit loss for these securities. State and municipal bonds carry an investment grade from an accredited ratings agency, primarily with an investment grade rating. In addition, Arrow has a limited amount of New York state local municipal bonds that are not rated. The estimate of expected credit losses on the HTM portfolio is based on the expected cash flows of each individual CUSIP over its contractual life and utilized a municipal loss forecast model for determining PD and LGD rates. Management may exercise discretion to make adjustments based on environmental factors. A calculated expected credit loss for individual securities was determined using the PD and LGD rates. Arrow determined that the expected credit loss on its municipal bond portfolio was de minimis, and therefore, an allowance for credit losses was not recorded. Allowance for Credit Losses – Available-for-Sale (AFS) Debt Securities - The impairment model for AFS debt securities differs from the CECL approach utilized by HTM debt securities since AFS debt securities are measured at fair value rather than amortized cost. For AFS debt securities in an unrealized loss position, Arrow first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For AFS debt securities that do not meet the aforementioned criteria, in making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, adverse conditions specifically related to the security, failure of the issuer of the debt security to make scheduled interest or principal payments, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. The cash flows are estimated using information relevant to the collectability of the security, including information about past events, current conditions and reasonable and supportable forecasts. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Investments in Federal Reserve Bank ("FRB") and Federal Home Loan Bank ("FHLB") stock are required for membership in those organizations and are carried at cost since there is no market value available. The FHLB New York ("FHLBNY") continues to pay dividends and repurchase stock. As such, the Company has not recognized any impairment on its holdings of FRB and FHLB stock.

Cash and Cash Equivalents (Tabl

Cash and Cash Equivalents (Tables)	3 Months Ended
	Mar. 31, 2024
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents	The following table is the schedule of Cash and Cash Equivalents at March 31, 2024, December 31, 2023 and March 31, 2023: March 31, 2024 December 31, 2023 March 31, 2023 Cash and Due From Banks $ 27,356 $ 36,755 $ 25,107 Interest-bearing Deposits at Banks 255,109 105,781 178,365 Total Cash and Cash Equivalents $ 282,465 142,536 203,472
Restrictions on Cash and Cash Equivalents	The following table is the schedule of Cash and Cash Equivalents at March 31, 2024, December 31, 2023 and March 31, 2023: March 31, 2024 December 31, 2023 March 31, 2023 Cash and Due From Banks $ 27,356 $ 36,755 $ 25,107 Interest-bearing Deposits at Banks 255,109 105,781 178,365 Total Cash and Cash Equivalents $ 282,465 142,536 203,472

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-For-Sale	The following table is the schedule of Available-For-Sale Securities at March 31, 2024, December 31, 2023 and March 31, 2023: Available-For-Sale Securities U.S. Treasuries U.S. Government & Agency State and Mortgage- Corporate Total March 31, 2024 Available-For-Sale Securities, $ 74,190 $ 160,000 $ 280 $ 294,858 $ 1,000 $ 530,328 Gross Unrealized Gains 4 39 — 13 — 56 Gross Unrealized Losses (42) (7,290) — (37,154) (65) (44,551) Available-For-Sale Securities, 74,152 152,749 280 257,717 935 485,833 Available-For-Sale Securities, 310,587 Maturities of Debt Securities, Within One Year $ 49,263 $ 30,000 $ — $ 2,555 $ — $ 81,818 From 1 - 5 Years 24,927 130,000 — 152,490 — 307,417 From 5 - 10 Years — — 280 139,813 1,000 141,093 Over 10 Years — — — — — — Maturities of Debt Securities, Within One Year $ 49,260 $ 29,498 $ — $ 2,491 $ — $ 81,249 From 1 - 5 Years 24,892 123,251 — 137,632 — 285,775 From 5 - 10 Years — — 280 117,594 935 118,809 Over 10 Years — — — — — — Securities in a Continuous Less than 12 Months $ 49,287 $ — $ — $ 71 $ — $ 49,358 12 Months or Longer — 137,710 — 252,064 935 390,709 Total $ 49,287 $ 137,710 $ — $ 252,135 $ 935 $ 440,067 Number of Securities in a 2 19 — 98 1 120 Unrealized Losses on Less than 12 Months $ 42 $ — $ — $ — $ — $ 42 12 Months or Longer — 7,290 — 37,154 65 44,509 Total $ 42 $ 7,290 $ — $ 37,154 $ 65 $ 44,551 Disaggregated Details: US Treasuries, $ 74,190 US Treasuries, 74,152 US Agency Obligations, $ 160,000 US Agency Obligations, 152,749 Local Municipal Obligations, $ 280 Local Municipal Obligations, 280 US Government Agency $ 7,180 Available-For-Sale Securities U.S. Treasuries U.S. Government & Agency State and Mortgage- Corporate Total US Government Agency 6,843 Government Sponsored Entity 287,678 Government Sponsored Entity 250,874 Corporate Trust Preferred Securities, at Amortized Cost $ 1,000 Corporate Trust Preferred Securities, at Fair Value 935 December 31, 2023 Available-For-Sale Securities, $ 73,761 $ 160,000 $ 280 $ 305,161 $ 1,000 $ 540,202 Gross Unrealized Gains 243 51 — 6 — 300 Gross Unrealized Losses — (7,126) — (35,407) (200) (42,733) Available-For-Sale Securities, 74,004 152,925 280 269,760 800 497,769 Available-For-Sale Securities, 242,938 Securities in a Continuous Less than 12 Months $ — $ — $ — $ — $ — $ — 12 Months or Longer — 137,874 — 269,286 800 407,960 Total $ — $ 137,874 $ — $ 269,286 $ 800 $ 407,960 Number of Securities in a — 19 — 97 1 117 Unrealized Losses on Less than 12 Months $ — $ — $ — $ — $ — $ — 12 Months or Longer — 7,126 — 35,407 200 42,733 Total $ — $ 7,126 $ — $ 35,407 $ 200 $ 42,733 Disaggregated Details: US Treasuries, $ 73,761 US Treasuries, 74,004 US Agency Obligations, $ 160,000 US Agency Obligations, 152,925 Local Municipal Obligations, $ 280 Local Municipal Obligations, 280 US Government Agency $ 7,291 US Government Agency 6,864 Government Sponsored Entity 297,870 Government Sponsored Entity 262,896 Corporate Trust Preferred Securities, at Amortized Cost $ 1,000 Available-For-Sale Securities U.S. Treasuries U.S. Government & Agency State and Mortgage- Corporate Total Corporate Trust Preferred Securities, at Fair Value 800 March 31, 2023 Available-For-Sale Securities, $ — $ 190,000 $ 320 $ 431,754 $ 1,000 $ 623,074 Gross Unrealized Gains — — — 160 — 160 Gross Unrealized Losses — (12,415) — (44,926) (200) (57,541) Available-For-Sale Securities, — 177,585 320 386,988 800 565,693 Available-For-Sale Securities, 360,153 Securities in a Continuous Less than 12 Months $ — $ 54,058 $ — $ 27,106 $ — $ 81,164 12 Months or Longer — 123,526 — 346,733 800 471,059 Total $ — $ 177,584 $ — $ 373,839 $ 800 $ 552,223 Number of Securities in a — 25 — 150 1 176 Unrealized Losses on Securities Less than 12 Months $ — $ 942 $ — $ 891 $ — $ 1,833 12 Months or Longer — 11,473 — 44,035 200 55,708 Total $ — $ 12,415 $ — $ 44,926 $ 200 $ 57,541 Disaggregated Details: US Treasury Obligations, $ — US Treasury Obligations, — US Agency Obligations, $ 190,000 US Agency Obligations, 177,585 Local Municipal Obligations, $ 320 Local Municipal Obligations, 320 US Government Agency $ 7,782 US Government Agency 7,321 Government Sponsored Entity 423,972 Government Sponsored Entity 379,667 Corporate Trust Preferred Securities, at Amortized Cost $ 1,000 Corporate Trust Preferred Securities, at Fair Value 800
Held-To-Maturity Securities	The following table is the schedule of Held-To-Maturity Securities at March 31, 2024, December 31, 2023 and March 31, 2023: Held-To-Maturity Securities State and Mortgage- Total March 31, 2024 Held-To-Maturity Securities, $ 119,742 $ 8,309 $ 128,051 Gross Unrealized Losses (2,794) (396) (3,190) Held-To-Maturity Securities, 116,948 7,913 124,861 Held-To-Maturity Securities, 112,135 Held-To-Maturity Securities, 108,945 Maturities of Debt Securities, Within One Year $ 47,680 $ — $ 47,680 From 1 - 5 Years 69,839 8,309 78,148 From 5 - 10 Years 2,217 — 2,217 Over 10 Years 6 — 6 Maturities of Debt Securities, Within One Year $ 47,387 $ — $ 47,387 From 1 - 5 Years 67,392 7,913 75,305 From 5 - 10 Years 2,163 — 2,163 Over 10 Years 6 — 6 Securities in a Continuous Less than 12 Months $ 1,143 $ — $ 1,143 12 Months or Longer 98,954 7,913 106,867 Total $ 100,097 $ 7,913 $ 108,010 Number of Securities in a 308 16 324 Unrealized Losses on Securities Less than 12 Months $ 17 $ — $ 17 12 Months or Longer 2,777 396 3,173 Total $ 2,794 $ 396 $ 3,190 Disaggregated Details: Municipal Obligations, at Amortized Cost $ 119,742 Municipal Obligations, at Fair Value 116,948 US Government Agency $ 2,911 Held-To-Maturity Securities State and Mortgage- Total US Government Agency 2,766 Government Sponsored Entity 5,398 Government Sponsored Entity 5,147 December 31, 2023 Held-To-Maturity Securities, $ 122,450 $ 8,945 $ 131,395 Gross Unrealized Losses (2,157) (401) (2,558) Held-To-Maturity Securities, 120,293 8,544 128,837 Held-To-Maturity Securities, 115,030 Held-To-Maturity Securities, 112,472 Securities in a Continuous Less than 12 Months $ 1,472 $ — $ 1,472 12 Months or Longer 102,839 8,544 111,383 Total $ 104,311 $ 8,544 $ 112,855 Number of Securities in a 319 16 335 Unrealized Losses on Less than 12 Months $ 14 $ — $ 14 12 Months or Longer 2,143 402 2,545 Total $ 2,157 $ 402 $ 2,559 Disaggregated Details: Municipal Obligations, at Amortized Cost $ 122,450 Municipal Obligations, at Fair Value 120,293 US Government Agency $ 3,114 US Government Agency 2,954 Government Sponsored Entity 5,831 Government Sponsored Entity 5,589 March 31, 2023 Held-To-Maturity Securities, $ 156,314 $ 11,033 $ 167,347 Gross Unrealized Gains 2 — 2 Gross Unrealized Losses (2,421) (489) (2,910) Held-To-Maturity Securities, 153,895 10,544 164,439 Held-To-Maturity Securities State and Mortgage- Total Held-To-Maturity Securities, 149,810 Held-To-Maturity Securities, 146,902 Securities in a Continuous Less than 12 Months $ 43,121 $ — $ 43,121 12 Months or Longer 90,439 10,544 100,983 Total $ 133,560 $ 10,544 $ 144,104 Number of Securities in a 386 16 402 Unrealized Losses on Less than 12 Months $ 496 $ — $ 496 12 Months or Longer 1,925 489 2,414 Total $ 2,421 $ 489 $ 2,910 Disaggregated Details: Municipal Obligations, at Amortized Cost $ 156,314 Municipal Obligations, at Fair Value 153,895 US Government Agency $ 3,699 US Government Agency 3,522 Government Sponsored Entity 7,334 Government Sponsored Entity 7,022
Debt Securities, Trading, and Equity Securities, FV-NI	The following table is the schedule of Equity Securities at March 31, 2024, December 31, 2023 and March 31, 2023: Equity Securities March 31, 2024 December 31, 2023 March 31, 2023 Equity Securities, at Fair Value $1,942 $1,925 $2,070
Unrealized Gain (Loss) on Investments	The following is a summary of realized and unrealized gains and losses recognized in net income on equity securities during the three and three month periods ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Net Gain (Loss) on Equity Securities $ 17 $ (104) Less: Net gain recognized during the reporting period on equity securities sold during the period — — Unrealized net gain (loss) recognized during the reporting period on equity securities still held at the reporting date $ 17 $ (104)

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Past Due Financing Receivables	The following two tables present loan balances outstanding as of March 31, 2024, December 31, 2023 and March 31, 2023 and an analysis of the recorded investment in loans that are past due at these dates. Generally, Arrow considers a loan past due 30 or more days when the borrower is two payments past due. Loans held-for-sale of $215, $165 and $417 as of March 31, 2024, December 31, 2023 and March 31, 2023, respectively, are included in the residential real estate balances for current loans. Schedule of Past Due Loans by Loan Category Commercial Commercial Real Estate Consumer Residential Total March 31, 2024 Loans Past Due 30-59 Days $ 419 $ 494 $ 12,140 $ 2,215 $ 15,268 Loans Past Due 60-89 Days 24 — 2,600 409 3,033 Loans Past Due 90 or more Days 35 15,148 1,429 3,506 20,118 Total Loans Past Due 478 15,642 16,169 6,130 38,419 Current Loans 161,911 735,327 1,109,585 1,213,516 3,220,339 Total Loans $ 162,389 $ 750,969 $ 1,125,754 $ 1,219,646 $ 3,258,758 December 31, 2023 Loans Past Due 30-59 Days $ 298 $ — $ 13,511 $ 3,715 $ 17,524 Loans Past Due 60-89 Days 21 636 5,579 861 7,097 Loans Past Due 90 or more Days 30 15,308 1,801 3,140 20,279 Total Loans Past Due 349 15,944 20,891 7,716 44,900 Current Loans 155,875 729,543 1,090,776 1,191,814 3,168,008 Total Loans $ 156,224 $ 745,487 $ 1,111,667 $ 1,199,530 $ 3,212,908 March 31, 2023 Loans Past Due 30-59 Days $ 62 $ — $ 11,237 $ 1,593 $ 12,892 Loans Past Due 60-89 Days 47 — 4,439 — 4,486 Loans Past Due 90 or more Days — — 3,005 3,143 6,148 Total Loans Past Due 109 — 18,681 4,736 23,526 Current Loans 135,808 715,357 1,054,688 1,075,973 2,981,826 Total Loans $ 135,917 $ 715,357 $ 1,073,369 $ 1,080,709 $ 3,005,352 Schedule of Non Accrual Loans by Category Commercial March 31, 2024 Commercial Real Estate Consumer Residential Total Loans 90 or More Days Past Due $ — $ — $ 13 $ 1,134 $ 1,147 Nonaccrual Loans 35 15,148 1,525 3,536 20,244 Nonaccrual With No Allowance for Credit Loss 35 15,148 1,525 3,536 20,244 Interest Income on Nonaccrual Loans — — — — — December 31, 2023 Loans 90 or More Days Past Due $ — $ — $ 6 $ 446 $ 452 Nonaccrual Loans 30 15,308 1,877 3,430 20,645 March 31, 2023 Loans 90 or More Days Past Due $ — $ — $ — $ 241 $ 241 Nonaccrual Loans 8 3,085 3,123 4,636 10,852
Allowance for Credit Losses on Financing Receivables	The following table details activity in the allowance for credit losses on loans for the three ended March 31, 2024 and March 31, 2023: Allowance for Credit Losses Commercial Commercial Real Estate Consumer Residential Total Rollforward of the Allowance for Credit Losses for the Quarterly Period: December 31, 2023 $ 1,958 $ 15,521 $ 2,566 $ 11,220 $ 31,265 Charge-offs $ (9) $ — $ (1,274) $ — $ (1,283) Recoveries $ — $ — $ 962 $ — $ 962 Provision $ 893 $ (1,353) $ 502 $ 575 $ 617 March 31, 2024 $ 2,842 $ 14,168 $ 2,756 $ 11,795 $ 31,561 December 31, 2022 $ 1,961 $ 15,213 $ 2,585 $ 10,193 $ 29,952 Charge-offs $ — $ — $ (1,328) $ — $ (1,328) Recoveries $ — $ — $ 606 $ — $ 606 Provision $ (224) $ 289 $ 1,000 $ 489 $ 1,554 March 31, 2023 $ 1,737 $ 15,502 $ 2,863 $ 10,682 $ 30,784 The following tables present the amortized cost basis of collateral-dependent loans by class of loans as of March 31, 2024, December 31, 2023 and March 31, 2023: March 31, 2024 Collateral Type -Residential Real Estate Collateral Type - Commercial Real Estate Total Loans Commercial $ — $ — $ — Commercial Real Estate — 15,179 15,179 Consumer — — — Residential 1,886 — 1,886 Total $ 1,886 $ 15,179 $ 17,065 December 31, 2023 Collateral Type -Residential Real Estate Collateral Type - Commercial Real Estate Total Loans Commercial $ — $ — $ — Commercial Real Estate — 15,308 15,308 Consumer — — — Residential 1,446 — 1,446 Total $ 1,446 $ 15,308 $ 16,754 March 31, 2023 Collateral Type -Residential Real Estate Collateral Type - Commercial Real Estate Total Loans Commercial $ — $ — $ — Commercial Real Estate — 3,027 3,027 Consumer — — — Residential 1,949 — 1,949 Total $ 1,949 $ 3,027 $ 4,976 Allowance for Credit Losses - Collectively and Individually Evaluated Commercial Commercial Real Estate Consumer Residential Total March 31, 2024 Ending Loan Balance - Collectively Evaluated $ 160,894 $ 735,821 $ 1,125,754 $ 1,217,758 $ 3,240,227 Allowance for Credit Losses - Loans Collectively Evaluated 2,110 14,168 2,756 11,795 30,829 Ending Loan Balance - Individually Evaluated 1,495 15,148 — 1,888 18,531 Allowance for Credit Losses - Loans Individually Evaluated 732 — — — 732 December 31, 2023 Ending Loan Balance - Collectively Evaluated $ 156,224 $ 730,179 $ 1,111,667 $ 1,198,084 $ 3,196,154 Allowance for Credit Losses - Loans Collectively Evaluated 1,958 15,521 2,566 11,220 31,265 Ending Loan Balance - Individually Evaluated — 15,308 — 1,446 16,754 Allowance for Credit Losses - Loans Individually Evaluated — — — — — March 31, 2023 Ending Loan Balance - Collectively Evaluated $ 135,917 $ 712,330 $ 1,073,369 $ 1,078,760 $ 3,000,376 Allowance for Credit Losses - Loans Collectively Evaluated 1,737 15,502 2,863 10,682 30,784 Ending Loan Balance - Individually Evaluated — 3,027 — 1,949 4,976 Allowance for Credit Losses - Loans Individually Evaluated — — — — —
Financing Receivable Credit Quality Indicators	The following tables present credit quality indicators by total loans amortized cost basis by origination year as of March 31, 2024, December 31, 2023 and March 31, 2023: Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Revolving Loan Converted to Term Total March 31, 2024 2024 2023 2022 2021 2020 Prior Commercial: Risk rating Satisfactory $ 8,925 $ 25,424 $ 18,661 $ 17,276 $ 5,645 $ 69,588 $ 9,915 $ — $ 155,434 Special mention — — — — 106 — — — 106 Substandard — — — — — 3,129 3,720 — 6,849 Doubtful — — — — — — — — — Total Commercial Loans $ 8,925 $ 25,424 $ 18,661 $ 17,276 $ 5,751 $ 72,717 $ 13,635 $ — $ 162,389 Current-period gross charge-offs $ — $ — $ — $ — $ 9 $ — $ — $ — $ 9 Commercial Real Estate: Risk rating Satisfactory $ 9,548 $ 50,480 $ 109,750 $ 60,070 $ 84,319 $ 368,036 $ 1,885 $ — $ 684,088 Special mention — — 3,092 — — 15,380 — — 18,472 Substandard — 149 9,038 1,670 2,328 35,102 122 — 48,409 Doubtful — — — — — — — — — Total Commercial Real Estate Loans $ 9,548 $ 50,629 $ 121,880 $ 61,740 $ 86,647 $ 418,518 $ 2,007 $ — $ 750,969 Current-period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Consumer: Risk rating Performing $ 83,515 $ 261,853 $ 208,788 $ 110,546 $ 50,713 $ 407,586 $ 459 $ — $ 1,123,460 Nonperforming — 136 291 182 64 1,611 10 — 2,294 Total Consumer Loans $ 83,515 $ 261,989 $ 209,079 $ 110,728 $ 50,777 $ 409,197 $ 469 $ — $ 1,125,754 Current-period gross charge-offs $ 583 $ 150 $ 248 $ 177 $ 104 $ 12 $ — $ — $ 1,274 Residential: Risk rating Performing $ 12,555 $ 82,726 $ 185,667 $ 166,141 $ 86,843 $ 564,901 $ 115,104 $ — $ 1,213,937 Nonperforming — 189 442 1,654 — 3,094 330 — 5,709 Total Residential Loans $ 12,555 $ 82,915 $ 186,109 $ 167,795 $ 86,843 $ 567,995 $ 115,434 $ — $ 1,219,646 Current-period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Total Loans $ 114,543 $ 420,957 $ 535,729 $ 357,539 $ 230,018 $ 1,468,427 $ 131,545 $ — $ 3,258,758 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Revolving Loan Converted to Term Total December 31, 2023 2023 2022 2021 2020 2019 Prior Commercial: Risk rating Satisfactory $ 54,584 $ 34,047 $ 23,470 $ 9,655 $ 4,107 $ 13,360 $ 8,586 $ — $ 147,809 Special mention — — — 117 — — — — 117 Substandard — — — — — 3,199 5,099 — 8,298 Doubtful — — — — — — — — — Total Commercial Loans $ 54,584 $ 34,047 $ 23,470 $ 9,772 $ 4,107 $ 16,559 $ 13,685 $ — $ 156,224 Commercial Real Estate: Risk rating Satisfactory $ 81,582 $ 151,818 $ 105,365 $ 120,845 $ 41,406 $ 174,516 $ 1,667 $ — $ 677,199 Special mention — 10,439 — — — 4,084 — — 14,523 Substandard 150 9,169 1,670 2,533 791 38,955 497 — 53,765 Doubtful — — — — — — — — — Total Commercial Real Estate Loans $ 81,732 $ 171,426 $ 107,035 $ 123,378 $ 42,197 $ 217,555 $ 2,164 $ — $ 745,487 Consumer: Risk rating Performing $ 405,099 $ 355,217 $ 195,799 $ 93,708 $ 44,206 $ 15,252 $ — $ — $ 1,109,281 Nonperforming 208 783 551 210 81 85 468 — 2,386 Total Consumer Loans $ 405,307 $ 356,000 $ 196,350 $ 93,918 $ 44,287 $ 15,337 $ 468 $ — $ 1,111,667 Residential: Risk rating Performing $ 161,878 $ 231,365 $ 192,588 $ 116,451 $ 73,875 $ 296,935 $ 122,573 $ — $ 1,195,665 Nonperforming — — 444 666 127 2,268 360 — 3,865 Total Residential Loans $ 161,878 $ 231,365 $ 193,032 $ 117,117 $ 74,002 $ 299,203 $ 122,933 $ — $ 1,199,530 Total Loans $ 703,501 $ 792,838 $ 519,887 $ 344,185 $ 164,593 $ 548,654 $ 139,250 $ — $ 3,212,908 Term Loans Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Revolving Loan Converted to Term Total March 31, 2023 2023 2022 2021 2020 2019 Prior Commercial: Risk rating Satisfactory $ 4,727 $ 35,164 $ 26,254 $ 12,765 $ 6,830 $ 35,014 $ 8,095 $ — $ 128,849 Special mention — — — 150 — 26 26 — 202 Substandard — — — 230 420 3,420 2,796 — 6,866 Doubtful — — — — — — — — — Total Commercial Loans $ 4,727 $ 35,164 $ 26,254 $ 13,145 $ 7,250 $ 38,460 $ 10,917 $ — $ 135,917 Commercial Real Estate: Risk rating Satisfactory $ 12,605 $ 157,534 $ 115,019 $ 122,364 $ 42,710 $ 212,115 $ 1,679 $ — $ 664,026 Special mention — — — — — 5,043 — — 5,043 Substandard — 10,150 — 5,472 806 29,832 28 — 46,288 Doubtful — — — — — — — — — Total Commercial Real Estate Loans $ 12,605 $ 167,684 $ 115,019 $ 127,836 $ 43,516 $ 246,990 $ 1,707 $ — $ 715,357 Consumer: Risk rating Performing $ 71,838 $ 379,339 $ 261,675 $ 138,034 $ 75,650 $ 143,190 $ — $ — $ 1,069,726 Nonperforming — 1,030 1,090 434 261 371 457 — 3,643 Total Consumer Loans $ 71,838 $ 380,369 $ 262,765 $ 138,468 $ 75,911 $ 143,561 $ 457 $ — $ 1,073,369 Residential: Risk rating Performing $ 15,565 $ 219,336 $ 197,436 $ 124,992 $ 80,986 $ 323,945 $ 113,220 $ — $ 1,075,480 Nonperforming — 550 435 939 636 2,462 207 — 5,229 Total Residential Loans $ 15,565 $ 219,886 $ 197,871 $ 125,931 $ 81,622 $ 326,407 $ 113,427 $ — $ 1,080,709 Total Loans $ 104,735 $ 803,103 $ 601,909 $ 405,380 $ 208,299 $ 755,418 $ 126,508 $ — $ 3,005,352

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Schedule of Debt	Schedule of Borrowings: March 31, 2024 December 31, 2023 March 31, 2023 Balance: BTFP Advances $ 100,000 $ — $ — FHLBNY Overnight Advances — 20,000 35,000 FHLBNY Term Advances 6,500 6,500 107,800 Total Borrowings $ 106,500 $ 26,500 $ 142,800 Maximum Borrowing Capacity: Federal Funds Purchased $ 28,000 $ 28,000 $ 52,000 Federal Home Loan Bank of New York 604,729 576,602 778,368 Federal Reserve Bank of New York 851,886 738,511 689,883 Available Borrowing Capacity: Federal Funds Purchased $ 28,000 $ 28,000 $ 52,000 Federal Home Loan Bank of New York 553,229 550,102 535,568 Federal Reserve Bank of New York 751,886 738,511 689,883
Schedule of Maturities of Short-Term Debt	Maturity Schedule of FHLBNY Term Advances : Balances Weighted Average Rate Final Maturity 3/31/2024 12/31/2023 3/31/2023 3/31/2024 12/31/2023 3/31/2023 First Year $ 4,250 $ 4,250 $ 107,800 5.80 % 5.80 % 5.29 % Second Year 2,250 2,250 — 5.38 % 5.38 % — % Total $ 6,500 $ 6,500 $ 107,800 5.66 % 5.66 % 5.29 %
Schedule of Long-Term Debt Instruments	Schedule of Guaranteed Preferred Beneficial Interests in Corporation's Junior Subordinated Debentures March 31, 2024 December 31, 2023 March 31, 2023 ACST II Balance $ 10,000 $ 10,000 $ 10,000 Period End: Variable Interest Rate 8.71 % 8.74 % 8.31 % Fixed Interest Rate resulting from cash flow hedge agreement 4.00 % 4.00 % 4.00 % ACST III Balance $ 10,000 $ 10,000 $ 10,000 Period End: Variable Interest Rate 7.56 % 7.59 % 7.16 % Fixed Interest Rate resulting from cash flow hedge agreement 2.86 % 2.86 % 2.86 %

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Guarantor Obligations	The following table presents the notional amount and fair value of Arrow's off-balance sheet commitments to extend credit and commitments under standby letters of credit as of March 31, 2024, December 31, 2023 and March 31, 2023: Commitments to Extend Credit and Letters of Credit March 31, 2024 December 31, 2023 March 31, 2023 Notional Amount: Commitments to Extend Credit $ 443,960 $ 444,256 $ 478,253 Standby Letters of Credit 3,401 3,824 3,424 Fair Value: Commitments to Extend Credit $ — $ — $ — Standby Letters of Credit 2 — 6

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2024
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Comprehensive Income	The following table presents the components of other comprehensive income for the three month periods ended March 31, 2024 and 2023: Schedule of Comprehensive Income Three Months Ended March 31 Tax Before-Tax Benefit Net-of-Tax Amount (Expense) Amount 2024 Net Unrealized Securities Holding Loss on Securities Available-for-Sale Arising During the Period $ (2,062) $ 532 $ (1,530) Net Unrealized Gain on Cash Flow Swap 3,221 (831) 2,390 Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense (213) 55 (158) Amortization of Net Retirement Plan Actuarial Gain (66) 16 (50) Amortization of Net Retirement Plan Prior Service Cost 69 (19) 50 Other Comprehensive Income $ 949 $ (247) $ 702 2023 Net Unrealized Securities Holding Gain on Securities Available-for-Sale Arising During the Period $ 8,219 $ (2,120) $ 6,099 Net Unrealized Loss on Cash Flow Swap (800) 207 (593) Reclassification of Net Unrealized Loss on Cash Flow Hedge Agreements to Interest Expense 198 (51) 147 Amortization of Net Retirement Plan Actuarial Gain (25) 7 (18) Amortization of Net Retirement Plan Prior Service Cost 52 (15) 37 Other Comprehensive Income $ 7,644 $ (1,972) $ 5,672
Changes in Accumulated Other Comprehensive Income By Component	The following table presents the changes in accumulated other comprehensive (loss) income by component: Changes in Accumulated Other Comprehensive (Loss) Income by Component (1) Unrealized Loss on Available-for-Sale Securities Unrealized Gain on Cash Flow Swap Defined Benefit Plan Items Total Net Actuarial Loss Net Prior Service Cost For the quarter-to-date periods ended: December 31, 2023 $ (31,648) $ 1,711 $ (2,839) $ (640) $ (33,416) Other comprehensive income or loss before reclassifications (1,530) 2,390 — — 860 Amounts reclassified from accumulated other comprehensive income or loss — (158) (50) 50 (158) Net current-period other comprehensive income or loss (1,530) 2,232 (50) 50 702 March 31, 2024 $ (33,178) $ 3,943 $ (2,889) $ (590) $ (32,714) December 31, 2022 $ (48,841) $ 4,054 $ (4,467) $ (401) $ (49,655) Other comprehensive income or loss before reclassifications 6,099 (593) — — 5,506 Amounts reclassified from accumulated other comprehensive income or loss — 147 (18) 37 166 Net current-period other comprehensive income or loss 6,099 (446) (18) 37 5,672 March 31, 2023 $ (42,742) $ 3,608 $ (4,485) $ (364) $ (43,983)
Reclassification out of Accumulated Other Comprehensive Income	The following table presents the reclassifications out of accumulated other comprehensive income or loss: Reclassifications Out of Accumulated Other Comprehensive Income or Loss Details about Accumulated Other Comprehensive Income or Loss Components Amounts Reclassified from Accumulated Other Comprehensive Income or Loss Affected Line Item in the Statement Where Net Income Is Presented For the quarter-to-date periods ended: March 31, 2024 Reclassification of Net Unrealized Gain on Cash Flow Hedge Agreements to Interest Expense $ 213 Interest expense Amortization of defined benefit pension items: Prior-service costs (69) (1) Salaries and Employee Benefits Actuarial gain 66 (1) Salaries and Employee Benefits 210 Total before Tax (52) Provision for Income Taxes Total reclassifications for the period $ 158 Net of Tax March 31, 2023 Reclassification of Net Unrealized Loss on Cash Flow Hedge Agreements to Interest Expense $ (198) Interest expense Amortization of defined benefit pension items: Prior-service costs $ (52) (1) Salaries and Employee Benefits Actuarial gain 25 (1) Salaries and Employee Benefits (225) Total before Tax 59 Provision for Income Taxes Total reclassifications for the period $ (166) Net of Tax (1) These accumulated other comprehensive gain or loss components are included in the computation of net periodic pension cost.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following table summarizes information about stock option activity for the year to date period ended March 31, 2024: Shares Weighted Average Exercise Price Outstanding at January 1, 2024 305,308 $ 28.96 Exercised (6,060) 18.97 Forfeited (7,979) 25.81 Outstanding at March 31, 2024 291,269 29.25 Vested at Period-End 230,561 28.65 Expected to Vest 60,708 31.54
Schedule of Stock Options Roll Forward	The following table summarizes information about stock option activity for the year to date period ended March 31, 2024: Shares Weighted Average Exercise Price Outstanding at January 1, 2024 305,308 $ 28.96 Exercised (6,060) 18.97 Forfeited (7,979) 25.81 Outstanding at March 31, 2024 291,269 29.25 Vested at Period-End 230,561 28.65 Expected to Vest 60,708 31.54
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	The following table presents information on the amounts expensed related to stock options for the three month periods ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Amount expensed $ 78 $ 85 The following table presents information on the amounts expensed related to restricted stock units for the periods ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Amount expensed $ — $ 37
Schedule of Nonvested Restricted Stock Units Activity	The following table summarizes information about restricted stock unit activity for the three month period ended March 31, 2023: Restricted Stock Units Weighted Average Grant Date Fair Value Non-vested at January 1, 2023 13,925 30.47 Granted 5,164 31.47 Vested (4,307) 31.35 Non-vested at March 31, 2023 14,782 30.56

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2024
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	The following tables provide the components of net periodic benefit costs for the three-month periods ended March 31, 2024 and 2023: Employees' Select Executive Postretirement Pension Retirement Benefit Plan Plan Plans Net Periodic Benefit Cost For the Three Months Ended March 31, 2024: Service Cost 1 $ 466 $ 17 $ 15 Interest Cost 2 525 158 81 Expected Return on Plan Assets 2 (932) — — Amortization of Prior Service Cost 2 33 10 26 Amortization of Net Loss (Gain) 2 — 21 (87) Net Periodic Cost $ 92 $ 206 $ 35 Plan Contributions During the Period $ — $ 127 $ 27 For the Three Months Ended March 31, 2023: Service Cost 1 $ 413 $ 163 $ 18 Interest Cost 2 530 62 87 Expected Return on Plan Assets 2 (857) — — Amortization of Prior Service Cost 2 16 10 26 Amortization of Net Loss (Gain) 2 36 18 (79) Net Periodic Cost $ 138 $ 253 $ 52 Plan Contributions During the Period $ — $ 116 $ 27 Estimated Future Contributions in the Current Fiscal Year $ — $ 382 $ 82 Footnotes: 1. Included in Salaries and Employee Benefits on the Consolidated Statements of Income 2. Included in Other Operating Expense on the Consolidated Statements of Income

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents a reconciliation of the numerator and denominator used in the calculation of basic and diluted earnings per common share (EPS) for periods ended March 31, 2024 and 2023. When applicable, share and per share amounts have been adjusted for the September 26, 2023, 3% stock dividend. Earnings Per Share Three Months Ended March 31, 2024 March 31, 2023 Earnings Per Share - Basic: Net Income $ 7,660 $ 8,562 Weighted Average Shares - Basic 16,865 17,048 Earnings Per Share - Basic $ 0.45 $ 0.50 Earnings Per Share - Diluted: Net Income $ 7,660 $ 8,562 Weighted Average Shares - Basic 16,865 17,048 Dilutive Average Shares Attributable to Stock Options 2 12 Weighted Average Shares - Diluted 16,867 17,060 Earnings Per Share - Diluted $ 0.45 $ 0.50

Fair Values (Tables)

Fair Values (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	The table below presents the financial instrument's fair value and the amounts within the fair value hierarchy based on the lowest level of input that is significant to the fair value measurement: Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis Fair Value Measurements at Reporting Date Using: Fair Value Quoted Prices Significant Other Significant Unobservable Inputs Fair Value of Assets and Liabilities Measured on a Recurring Basis: March 31, 2024 Assets: Securities Available-for Sale: U.S. Treasuries $ 74,152 $ — $ 74,152 $ — U.S. Government & Agency Obligations 152,749 — 152,749 $ — State and Municipal Obligations 280 — 280 — Mortgage-Backed Securities 257,717 — 257,717 — Corporate and Other Debt Securities 935 — 935 — Total Securities Available-for-Sale 485,833 — 485,833 — Equity Securities 1,942 — 1,942 — Total Securities Measured on a Recurring Basis 487,775 — 487,775 — Derivative Assets 12,747 — 12,747 — Total Measured on a Recurring Basis $ 500,522 $ — $ 500,522 $ — Liabilities: Derivative Liabilities 7,317 — 7,317 — Total Measured on a Recurring Basis $ 7,317 $ — $ 7,317 $ — December 31, 2023 Assets: Securities Available-for Sale: U.S. Treasuries $ 74,004 $ — $ 74,004 $ — U.S. Government & Agency Obligations $ 152,925 $ — $ 152,925 $ — State and Municipal Obligations 280 — 280 — Mortgage-Backed Securities 269,760 — 269,760 — Corporate and Other Debt Securities 800 — 800 — Fair Value of Assets and Liabilities Measured on a Recurring and Nonrecurring Basis Fair Value Measurements at Reporting Date Using: Fair Value Quoted Prices Significant Other Significant Unobservable Inputs Total Securities Available-for-Sale 497,769 — 497,769 — Equity Securities 1,925 — 1,925 — Total Securities Measured on a Recurring Basis 499,694 — 499,694 — Derivative Assets 12,057 — 12,057 — Total Measured on a Recurring Basis $ 511,751 $ — $ 511,751 $ — Liabilities: Derivative Liabilities $ 9,598 — $ 9,598 — Total Measured on a Recurring Basis $ 9,598 $ — $ 9,598 $ — March 31, 2023 Assets: Securities Available-for Sale: U.S. Government & Agency Obligations $ 177,585 $ — $ 177,585 $ — State and Municipal Obligations 320 — 320 — Mortgage-Backed Securities 386,988 — 386,988 — Corporate and Other Debt Securities 800 — 800 — Total Securities Available-for-Sale 565,693 — 565,693 — Equity Securities 2,070 — 2,070 — Total Securities Measured on a Recurring Basis 567,763 — 567,763 — Derivative Assets 6,206 — 6,206 — Total Measured on a Recurring Basis $ 573,969 $ — $ 573,969 $ — Liabilities: Derivative Liabilities 6,206 — 6,206 — Total Measured on a Recurring Basis $ 6,206 $ — $ 6,206 $ — Fair Value Quoted Prices Significant Other Significant Unobservable Inputs Gains (Losses) Recognized in Earnings Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis: March 31, 2024 Collateral Dependent Evaluated Loans $ — $ — $ — $ — Other Real Estate Owned and Repossessed Assets, Net 312 — — 312 — December 31, 2023 Collateral Dependent Impaired Loans $ — $ — $ — $ — Other Real Estate Owned and Repossessed Assets, Net 312 — — 312 — March 31, 2023 Collateral Dependent Impaired Loans $ — $ — $ — $ — Other Real Estate Owned and Repossessed Assets, Net 144 — — 144 —
Fair Value, by Balance Sheet Grouping	The following table presents a summary of the carrying amount, the fair value (exit price) or an amount approximating fair value and the fair value hierarchy of Arrow’s financial instruments: Schedule of Fair Values by Balance Sheet Grouping Fair Value Hierarchy Carrying Value Fair Value Level 1 Level 2 Level 3 March 31, 2024 Cash and Cash Equivalents $ 282,465 $ 282,465 $ 282,465 $ — $ — Securities Available-for-Sale 485,833 485,833 — 485,833 — Securities Held-to-Maturity 128,051 124,861 — 124,861 — Equity Securities 1,942 1,942 — 1,942 — Federal Home Loan Bank and Federal 4,208 4,208 — 4,208 — Net Loans 3,227,197 2,978,789 — — 2,978,789 Accrued Interest Receivable 12,754 12,754 — 12,754 — Derivative Assets 12,747 12,747 12,747 Deposits 3,779,021 3,774,378 — 3,774,378 — Borrowings 106,500 105,941 — 105,941 — Junior Subordinated Obligations Issued 20,000 20,000 — 20,000 — Accrued Interest Payable 7,996 7,996 — 7,996 — Derivative Liabilities 7,317 7,317 — 7,317 — Schedule of Fair Values by Balance Sheet Grouping Fair Value Hierarchy Carrying Value Fair Value Level 1 Level 2 Level 3 December 31, 2023 Cash and Cash Equivalents $ 142,536 $ 142,536 $ 142,536 $ — $ — Securities Available-for-Sale 497,769 497,769 — 497,769 — Securities Held-to-Maturity 131,395 128,837 — 128,837 — Equity Securities 1,925 1,925 1,925 Federal Home Loan Bank and Federal 5,049 5,049 — 5,049 — Net Loans 3,181,643 2,940,318 — — 2,940,318 Accrued Interest Receivable 11,076 11,076 — 11,076 — Derivative Assets 12,057 12,057 — 12,057 — Deposits 3,687,566 3,683,122 — 3,683,122 — Borrowings 26,500 26,189 — 26,189 — Junior Subordinated Obligations Issued 20,000 20,000 — 20,000 — Accrued Interest Payable 6,289 6,289 — 6,289 — Derivative Liabilities 9,598 9,598 — 9,598 — March 31, 2023 Cash and Cash Equivalents $ 203,472 $ 203,472 $ 203,472 $ — $ — Securities Available-for-Sale 565,693 565,693 — 565,693 — Securities Held-to-Maturity 167,347 164,439 — 164,439 — Equity Securities 2,070 2,070 — 2,070 Federal Home Loan Bank and Federal 10,027 10,027 — 10,027 — Net Loans 2,974,568 2,705,312 — — 2,705,312 Accrued Interest Receivable 9,857 9,857 — 9,857 — Derivative Assets 6,206 6,206 — 6,206 — Deposits 3,546,349 3,540,854 — 3,540,854 — Borrowings 107,800 107,830 — 107,830 — Junior Subordinated Obligations Issued 20,000 20,000 — 20,000 — Accrued Interest Payable 1,170 1,170 — 1,170 — Derivative Liabilities 6,206 6,206 — 6,206 —

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Lease, Cost	The following includes quantitative data related to Arrow's leases as of and for the three months ended March 31, 2024 and March 31, 2023: Three Months Ended Finance Lease Amounts: Classification March 31, 2024 March 31, 2023 Right-of-Use Assets Premises and Equipment, Net $ 4,416 $ 4,593 Lease Liabilities Finance Leases 5,053 5,106 Operating Lease Amounts: Right-of-Use Assets Other Assets $ 4,790 $ 5,388 Lease Liabilities Other Liabilities 4,997 5,584 Other Information: Cash Paid For Amounts Included In The Measurement Of Lease Liabilities: Operating Outgoing Cash Flows From Finance Leases $ 48 $ 49 Operating Outgoing Cash Flows From Operating Leases 155 257 Financing Outgoing Cash Flows From Finance Leases 13 13 Right-of-Use Assets Obtained In Exchange For New Finance Lease Liabilities — — Right-of-Use Assets Obtained In Exchange For New Operating Lease Liabilities — 19 Weighted-average Remaining Lease Term - Finance Leases (Yrs.) 26.04 27.00 Weighted-average Remaining Lease Term - Operating Leases (Yrs.) 11.06 11.45 Weighted-average Discount Rate—Finance Leases 3.75 % 3.75 % Weighted-average Discount Rate—Operating Leases 3.10 % 2.97 % Lease cost information for Arrow's leases is as follows: Three Months Ended March 31, 2024 March 31, 2023 Lease Cost: Finance Lease Cost: Reduction of Right-of-Use Assets $ 44 $ 44 Interest on Lease Liabilities 48 49 Operating Lease Cost 195 298 Short-term Lease Cost 10 14 Variable Lease Cost 75 73 Total Lease Cost $ 372 $ 478
Lessee, Operating Lease, Liability, Maturity	Future Lease Payments at March 31, 2024 are as follows: Operating Leases Financing Leases Twelve Months Ended: 3/31/2025 $ 720 $ 254 3/31/2026 671 264 3/31/2027 607 268 3/31/2028 537 268 3/31/2029 489 268 Thereafter 2,967 6,929 Total Undiscounted Cash Flows $ 5,991 $ 8,251 Less: Net Present Value Adjustment 994 3,198 Lease Liability $ 4,997 $ 5,053
Finance Lease, Liability, Maturity	Future Lease Payments at March 31, 2024 are as follows: Operating Leases Financing Leases Twelve Months Ended: 3/31/2025 $ 720 $ 254 3/31/2026 671 264 3/31/2027 607 268 3/31/2028 537 268 3/31/2029 489 268 Thereafter 2,967 6,929 Total Undiscounted Cash Flows $ 5,991 $ 8,251 Less: Net Present Value Adjustment 994 3,198 Lease Liability $ 4,997 $ 5,053

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	Derivatives Not Designated as Hedging Instruments - Interest Rate Swap Agreements March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other assets $ 6,111 $ 6,208 $ 6,206 Fair value adjustment included in other liabilities 6,111 6,208 6,206 Notional amount 107,991 123,197 126,637 Derivatives Designated as Hedging Instruments - Fair Value Agreements March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other assets $ — $ — $ — Fair value adjustment included in other liabilities 1,109 5,678 — Notional amount 300,000 300,000 — The following table represents the carrying value of the PLM hedged assets and the cumulative fair value hedging adjustment included in the carrying value of the hedged asset: Derivatives Designated as Hedging Instruments - Fair Value Swap Agreements March 31, 2024 December 31, 2023 March 31, 2023 Carrying Value of Portfolio Layer Method Hedged Asset $ 301,243 $ 305,849 $ — Cumulative Fair Value Hedging Adjustment 1,243 5,849 —
Derivative Instruments, Gain (Loss)	The following table summarizes the effect of the fair value hedging relationship recognized on the unaudited interim consolidated statement of income: Derivatives Designated as Hedging Instruments - Fair Value Agreements Three Months Ended Twelve Months Ended Three Months Ended March 31, 2024 December 31, 2023 March 31, 2023 Hedged Asset $ 1,243 $ 5,849 $ — Fair value derivative designated as hedging instrument (1,255) (5,828) — Total (loss) gain recognized in the consolidated statements of income with interest and fees on loans (12) 21 —
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	The following table indicates the effect of cash flow hedge accounting on AOCI and on the consolidated statement of income. Derivatives Designated as Hedging Instruments - Cash Flow Hedge Agreements March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other liabilities $ 97 $ 2,710 $ — Amount of gain (loss) recognized in AOCI 3,068 (2,553) — Amount of gain reclassified from AOCI interest expense 455 157 — Derivatives Designated as Hedging Instruments - Cash Flow Hedge Agreements Three Months Ended Twelve Months Ended Three Months Ended March 31, 2024 December 31, 2023 March 31, 2023 Fair value adjustment included in other assets $ 5,393 $ 4,998 $ 4,843 Amount of gain (loss) recognized in AOCI $ 153 $ (1,355) $ (800) Amount of loss reclassified from AOCI to interest expense (242) (907) (198)

Risks and Uncertainties (Detail

Risks and Uncertainties (Details)	3 Months Ended
	Mar. 31, 2024 bank subsidiaryBusinessTrust
Risks and Uncertainties [Abstract]
Number of banks | bank	2
Number of business subsidiary trusts | subsidiaryBusinessTrust	2

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Abstract]
Cash and Due From Banks	$ 27,356	$ 36,755	$ 25,107
Interest-Bearing Deposits at Banks	255,109	105,781	178,365
Total Cash and Cash Equivalents	$ 282,465	$ 142,536	$ 203,472	$ 64,660

Investment Securities - Availab

Investment Securities - Available for Sale (Details) $ in Thousands	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security	Mar. 31, 2023 USD ($) security
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	$ 530,328	$ 540,202	$ 623,074
Gross Unrealized Gains	56	300	160
Gross Unrealized Losses	(44,551)	(42,733)	(57,541)
Available-for-Sale at Fair Value	485,833	497,769	565,693
Maturities of Debt Securities, at Amortized Cost:
Within One Year	81,818
From 1 - 5 Years	307,417
From 5 - 10 Years	141,093
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	81,249
From 1 - 5 Years	285,775
From 5 - 10 Years	118,809
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	49,358	0	81,164
12 Months or Longer	390,709	407,960	471,059
Total	$ 440,067	$ 407,960	$ 552,223
Number of Securities in a Continuous Loss Position | security	120	117	176
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 42	$ 0	$ 1,833
12 Months or Longer	44,509	42,733	55,708
Total	44,551	42,733	57,541
Collateral Pledged
Available-For-Sale Securities
Available-For-Sale Securities, Pledged as Collateral, at Fair Value	310,587	242,938	360,153
U.S. Treasuries
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	74,190	73,761	0
Gross Unrealized Gains	4	243	0
Gross Unrealized Losses	(42)	0	0
Available-for-Sale at Fair Value	74,152	74,004	0
Maturities of Debt Securities, at Amortized Cost:
Within One Year	49,263
From 1 - 5 Years	24,927
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	49,260
From 1 - 5 Years	24,892
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	49,287	0	0
12 Months or Longer	0	0	0
Total	$ 49,287	$ 0	$ 0
Number of Securities in a Continuous Loss Position | security	2	0	0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 42	$ 0	$ 0
12 Months or Longer	0	0	0
Total	42	0	0
U.S. Government & Agency Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	160,000	160,000	190,000
Gross Unrealized Gains	39	51	0
Gross Unrealized Losses	(7,290)	(7,126)	(12,415)
Available-for-Sale at Fair Value	152,749	152,925	177,585
Maturities of Debt Securities, at Amortized Cost:
Within One Year	30,000
From 1 - 5 Years	130,000
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	29,498
From 1 - 5 Years	123,251
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	54,058
12 Months or Longer	137,710	137,874	123,526
Total	$ 137,710	$ 137,874	$ 177,584
Number of Securities in a Continuous Loss Position | security	19	19	25
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 942
12 Months or Longer	7,290	7,126	11,473
Total	7,290	7,126	12,415
U.S. Government & Agency Obligations | Agency Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	160,000	160,000	190,000
Available-for-Sale at Fair Value	152,749	152,925	177,585
State and Municipal Obligations
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	280	280	320
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	0	0	0
Available-for-Sale at Fair Value	280	280	320
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	280
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	280
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	0
12 Months or Longer	0	0	0
Total	$ 0	$ 0	$ 0
Number of Securities in a Continuous Loss Position | security	0	0	0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	0	0	0
Total	0	0	0
State and Municipal Obligations | Municipal Bonds
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	280	280	320
Available-for-Sale at Fair Value	280	280	320
Mortgage- Backed Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	294,858	305,161	431,754
Gross Unrealized Gains	13	6	160
Gross Unrealized Losses	(37,154)	(35,407)	(44,926)
Available-for-Sale at Fair Value	257,717	269,760	386,988
Maturities of Debt Securities, at Amortized Cost:
Within One Year	2,555
From 1 - 5 Years	152,490
From 5 - 10 Years	139,813
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	2,491
From 1 - 5 Years	137,632
From 5 - 10 Years	117,594
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	71	0	27,106
12 Months or Longer	252,064	269,286	346,733
Total	$ 252,135	$ 269,286	$ 373,839
Number of Securities in a Continuous Loss Position | security	98	97	150
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 891
12 Months or Longer	37,154	35,407	44,035
Total	37,154	35,407	44,926
Mortgage- Backed Securities | US Government Agencies Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	7,180	7,291	7,782
Available-for-Sale at Fair Value	6,843	6,864	7,321
Mortgage- Backed Securities | US Government-sponsored Enterprises Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	287,678	297,870	423,972
Available-for-Sale at Fair Value	250,874	262,896	379,667
Corporate and Other Debt Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000		1,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(65)		(200)
Available-for-Sale at Fair Value	935		800
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	1,000
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	0
From 5 - 10 Years	935
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0		0
12 Months or Longer	935		800
Total	$ 935		$ 800
Number of Securities in a Continuous Loss Position | security	1		1
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	0	$ 0
12 Months or Longer	65	200	200
Total	65	200	200
Corporate and Other Debt Securities | Corporate Trust Preferred Securities
Available-For-Sale Securities
Available-For-Sale Securities, at Amortized Cost	1,000	1,000	1,000
Gross Unrealized Gains		0
Gross Unrealized Losses		(200)
Available-for-Sale at Fair Value	$ 935	800	$ 800
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months		0
12 Months or Longer		800
Total		$ 800
Number of Securities in a Continuous Loss Position | security		1

Investment Securities - Held to

Investment Securities - Held to Maturity (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security	Mar. 31, 2023 USD ($) security
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, available-for-sale, allowance for credit loss, excluding accrued interest	$ 0
Held-To-Maturity Securities, at Amortized Cost	128,051,000	$ 131,395,000	$ 167,347,000
Gross Unrealized Gains			2,000
Gross Unrealized Losses	(3,190,000)	(2,558,000)	(2,910,000)
Held-To-Maturity Securities, at Fair Value	124,861,000	128,837,000	164,439,000
Maturities of Debt Securities, at Amortized Cost:
Within One Year	47,680,000
From 1 - 5 Years	78,148,000
From 5 - 10 Years	2,217,000
Over 10 Years	6,000
Maturities of Debt Securities, at Fair Value:
Within One Year	47,387,000
From 1 - 5 Years	75,305,000
From 5 - 10 Years	2,163,000
Over 10 Years	6,000
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	1,143,000	1,472,000	43,121,000
12 Months or Longer	106,867,000	111,383,000	100,983,000
Total	$ 108,010,000	$ 112,855,000	$ 144,104,000
Number of Securities in a Continuous Loss Position | security	324	335	402,000
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 17,000	$ 14,000	$ 496,000
12 Months or Longer	3,173,000	2,545,000	2,414,000
Total	3,190,000	2,559,000	2,910,000
Debt securities, available-for-sale, excluding accrued interest, allowance for credit loss, not to sell before recovery, credit loss, previously recorded, expense (reversal)	0
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest	0
Equity Securities	1,942,000	1,925,000	2,070,000
State and Municipal Obligations
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	119,742,000	122,450,000	156,314,000
Gross Unrealized Gains			2,000
Gross Unrealized Losses	(2,794,000)	(2,157,000)	(2,421,000)
Held-To-Maturity Securities, at Fair Value	116,948,000	120,293,000	153,895,000
Maturities of Debt Securities, at Amortized Cost:
Within One Year	47,680,000
From 1 - 5 Years	69,839,000
From 5 - 10 Years	2,217,000
Over 10 Years	6,000
Maturities of Debt Securities, at Fair Value:
Within One Year	47,387,000
From 1 - 5 Years	67,392,000
From 5 - 10 Years	2,163,000
Over 10 Years	6,000
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	1,143,000	1,472,000	43,121,000
12 Months or Longer	98,954,000	102,839,000	90,439,000
Total	$ 100,097,000	$ 104,311,000	$ 133,560,000
Number of Securities in a Continuous Loss Position | security	308	319	386,000
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 17,000	$ 14,000	$ 496,000
12 Months or Longer	2,777,000	2,143,000	1,925,000
Total	2,794,000	2,157,000	2,421,000
Mortgage-Backed Securities - Residential
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	8,309,000	8,945,000	11,033,000
Gross Unrealized Gains			0
Gross Unrealized Losses	(396,000)	(401,000)	(489,000)
Held-To-Maturity Securities, at Fair Value	7,913,000	8,544,000	10,544,000
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	8,309,000
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	7,913,000
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	0	0	0
12 Months or Longer	7,913,000	8,544,000	10,544,000
Total	$ 7,913,000	$ 8,544,000	$ 10,544,000
Number of Securities in a Continuous Loss Position | security	16	16	16,000
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	396,000	402,000	489,000
Total	396,000	402,000	489,000
Fair Value, Measurements, Recurring
Unrealized Losses on Securities in a Continuous Loss Position:
Equity Securities	1,942,000	1,925,000	2,070,000
Collateral Pledged
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, Pledged as Collateral, at Carrying Value	112,135,000	115,030,000	149,810,000
Held-To-Maturity Securities, Pledged as Collateral, at Fair Value	108,945,000	112,472,000	146,902,000
Municipal Bonds | State and Municipal Obligations
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	119,742,000	122,450,000	156,314,000
Municipal Bonds | Fair Value, Measurements, Recurring | State and Municipal Obligations
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Fair Value	116,948,000	120,293,000	153,895,000
US Government Agencies Debt Securities | Mortgage-Backed Securities - Residential
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	2,911,000	3,114,000	3,699,000
US Government Agencies Debt Securities | Fair Value, Measurements, Recurring | Mortgage-Backed Securities - Residential
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Fair Value	2,766,000	2,954,000	3,522,000
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Amortized Cost	5,398,000	5,831,000	7,334,000
US Government-sponsored Enterprises Debt Securities | Fair Value, Measurements, Recurring | Mortgage-Backed Securities - Residential
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity Securities, at Fair Value	$ 5,147,000	$ 5,589,000	$ 7,022,000

Investment Securities - Unreali

Investment Securities - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Net Gain (Loss) on Equity Securities	$ 17	$ (104)
Less: Net gain recognized during the reporting period on equity securities sold during the period	0	0
Unrealized net gain (loss) recognized during the reporting period on equity securities still held at the reporting date	$ 17	$ (104)

Loans - Loan Categories and Pas

Loans - Loan Categories and Past Due Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans receivable held-for-sale, net, not part of disposal group	$ 215	$ 165	$ 417
Total Loans	3,258,758	3,212,908	3,005,352
Loans 90 or More Days Past Due and Still Accruing Interest	1,147	452	241
Nonaccrual Loans	20,244	20,645	10,852
Nonaccrual With No Allowance for Credit Loss	20,244
Interest Income on Nonaccrual Loans	0
Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	162,389	156,224	135,917
Loans 90 or More Days Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	35	30	8
Nonaccrual With No Allowance for Credit Loss	35
Interest Income on Nonaccrual Loans	0
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans	750,969	745,487	715,357
Loans 90 or More Days Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	15,148	15,308	3,085
Nonaccrual With No Allowance for Credit Loss	15,148
Interest Income on Nonaccrual Loans	0
Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	1,125,754	1,111,667	1,073,369
Loans 90 or More Days Past Due and Still Accruing Interest	13	6	0
Nonaccrual Loans	1,525	1,877	3,123
Nonaccrual With No Allowance for Credit Loss	1,525
Interest Income on Nonaccrual Loans	0
Residential
Financing Receivable, Past Due [Line Items]
Total Loans	1,219,646	1,199,530	1,080,709
Loans 90 or More Days Past Due and Still Accruing Interest	1,134	446	241
Nonaccrual Loans	3,536	3,430	4,636
Nonaccrual With No Allowance for Credit Loss	3,536
Interest Income on Nonaccrual Loans	0
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	38,419	44,900	23,526
Financial Asset, Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	478	349	109
Financial Asset, Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans	15,642	15,944	0
Financial Asset, Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	16,169	20,891	18,681
Financial Asset, Past Due | Residential
Financing Receivable, Past Due [Line Items]
Total Loans	6,130	7,716	4,736
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	15,268	17,524	12,892
Financing Receivables, 30 to 59 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	419	298	62
Financing Receivables, 30 to 59 Days Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans	494	0	0
Financing Receivables, 30 to 59 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	12,140	13,511	11,237
Financing Receivables, 30 to 59 Days Past Due | Residential
Financing Receivable, Past Due [Line Items]
Total Loans	2,215	3,715	1,593
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	3,033	7,097	4,486
Financing Receivables, 60 to 89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	24	21	47
Financing Receivables, 60 to 89 Days Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans	0	636	0
Financing Receivables, 60 to 89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	2,600	5,579	4,439
Financing Receivables, 60 to 89 Days Past Due | Residential
Financing Receivable, Past Due [Line Items]
Total Loans	409	861	0
Financing Receivables, Equal to Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	20,118	20,279	6,148
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	35	30	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans	15,148	15,308	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	1,429	1,801	3,005
Financing Receivables, Equal to Greater than 90 Days Past Due | Residential
Financing Receivable, Past Due [Line Items]
Total Loans	3,506	3,140	3,143
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	3,220,339	3,168,008	2,981,826
Financial Asset, Not Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	161,911	155,875	135,808
Financial Asset, Not Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans	735,327	729,543	715,357
Financial Asset, Not Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	1,109,585	1,090,776	1,054,688
Financial Asset, Not Past Due | Residential
Financing Receivable, Past Due [Line Items]
Total Loans	$ 1,213,516	$ 1,191,814	$ 1,075,973

Loans - Additional Information

Loans - Additional Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) loan_portfolio loan	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of loan portfolios | loan_portfolio	4
Allowance increase (decrease), net loan growth	$ 400
Allowance increase (decrease), change in macroeconomic conditions	(1,800)
Allowance increase (decrease), due to qualitative factors	900
Allowance increase (decrease), reserve due to overdraft balances	700
Provision	617	$ 1,554
Credit for estimated credit losses on off-balance sheet credit exposures	466
Off-balance sheet, credit loss, liability	$ 1,100
Number of loans individually evaluated for impairment | loan	5
Ending Loan Balance - Individually Evaluated	$ 17,100	4,976	$ 16,754
Number of loans with an allowance for credit loss on loans individually evaluated for impairment | loan	0
Loans modified during period, amount	$ 0		0
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision	575	489
Ending Loan Balance - Individually Evaluated	1,888	1,949	1,446
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision	502	1,000
Ending Loan Balance - Individually Evaluated	0	$ 0	$ 0
Mortgage loans in process of foreclosure, amount	$ 2,500
Consumer | Minimum | Automobile Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	3 years
Consumer | Minimum | Credit Card Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	1 year
Consumer | Maximum | Automobile Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	7 years
Consumer | Maximum | Credit Card Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	5 years

Loans - Allowance for Loan Loss

Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	$ 31,265	$ 29,952
Charge-offs	(1,283)	(1,328)
Recoveries	962	606
Provision	617	1,554
Allowance for Loan Losses, Ending balance	31,561	30,784
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	3,240,227	3,000,376	$ 3,196,154
Allowance for Credit Losses - Loans Collectively Evaluated	30,829	30,784	31,265
Ending Loan Balance - Individually Evaluated, Including Overdraft	18,531
Ending Loan Balance - Individually Evaluated	17,100	4,976	16,754
Allowance for Credit Losses - Loans Individually Evaluated	732	0	0
Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	1,958	1,961
Charge-offs	(9)	0
Recoveries	0	0
Provision	893	(224)
Allowance for Loan Losses, Ending balance	2,842	1,737
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	160,894	135,917	156,224
Allowance for Credit Losses - Loans Collectively Evaluated	2,110	1,737	1,958
Ending Loan Balance - Individually Evaluated, Including Overdraft	1,495
Ending Loan Balance - Individually Evaluated		0	0
Allowance for Credit Losses - Loans Individually Evaluated	732	0	0
Commercial Real Estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	15,521	15,213
Charge-offs	0	0
Recoveries	0	0
Provision	(1,353)	289
Allowance for Loan Losses, Ending balance	14,168	15,502
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	735,821	712,330	730,179
Allowance for Credit Losses - Loans Collectively Evaluated	14,168	15,502	15,521
Ending Loan Balance - Individually Evaluated	15,148	3,027	15,308
Allowance for Credit Losses - Loans Individually Evaluated	0	0	0
Consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	2,566	2,585
Charge-offs	(1,274)	(1,328)
Recoveries	962	606
Provision	502	1,000
Allowance for Loan Losses, Ending balance	2,756	2,863
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	1,125,754	1,073,369	1,111,667
Allowance for Credit Losses - Loans Collectively Evaluated	2,756	2,863	2,566
Ending Loan Balance - Individually Evaluated	0	0	0
Allowance for Credit Losses - Loans Individually Evaluated	0	0	0
Residential
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Allowance for Loan Losses, Beginning balance	11,220	10,193
Charge-offs	0	0
Recoveries	0	0
Provision	575	489
Allowance for Loan Losses, Ending balance	11,795	10,682
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Ending Loan Balance - Collectively Evaluated	1,217,758	1,078,760	1,198,084
Allowance for Credit Losses - Loans Collectively Evaluated	11,795	10,682	11,220
Ending Loan Balance - Individually Evaluated	1,888	1,949	1,446
Allowance for Credit Losses - Loans Individually Evaluated	$ 0	$ 0	$ 0

Loans - Amortized Cost Basis of

Loans - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 3,227,197	$ 3,181,643	$ 2,974,568
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	17,065	16,754	4,976
Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	15,179	15,308	3,027
Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	1,886	1,446	1,949
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	1,886	1,446	1,949
Residential Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Residential Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Residential Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Residential Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	1,886	1,446	1,949
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	15,179	15,308	3,027
Commercial Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Commercial Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	15,179	15,308	3,027
Commercial Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0	0	0
Commercial Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 0	$ 0	$ 0

Loans - Credit Quality Indicato

Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	$ 114,543	$ 104,735	$ 703,501
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	420,957	803,103	792,838
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	535,729	601,909	519,887
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	357,539	405,380	344,185
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	230,018	208,299	164,593
Prior	1,468,427	755,418	548,654
Revolving Loans Amortized Cost Basis	131,545	126,508	139,250
Revolving Loan Converted to Term	0	0	0
Total	3,258,758	3,005,352	3,212,908
Current-period gross charge-offs
Total	1,283	1,328
Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	8,925	4,727	54,584
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	25,424	35,164	34,047
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	18,661	26,254	23,470
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	17,276	13,145	9,772
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	5,751	7,250	4,107
Prior	72,717	38,460	16,559
Revolving Loans Amortized Cost Basis	13,635	10,917	13,685
Revolving Loan Converted to Term	0	0	0
Total	162,389	135,917	156,224
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	9
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	9
Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	9,548	12,605	81,732
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	50,629	167,684	171,426
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	121,880	115,019	107,035
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	61,740	127,836	123,378
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	86,647	43,516	42,197
Prior	418,518	246,990	217,555
Revolving Loans Amortized Cost Basis	2,007	1,707	2,164
Revolving Loan Converted to Term	0	0	0
Total	750,969	715,357	745,487
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	0
Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	83,515	71,838	405,307
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	261,989	380,369	356,000
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	209,079	262,765	196,350
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	110,728	138,468	93,918
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	50,777	75,911	44,287
Prior	409,197	143,561	15,337
Revolving Loans Amortized Cost Basis	469	457	468
Revolving Loan Converted to Term	0	0	0
Total	1,125,754	1,073,369	1,111,667
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	583
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	150
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	248
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	177
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	104
Prior	12
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	1,274	1,328
Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	12,555	15,565	161,878
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	82,915	219,886	231,365
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	186,109	197,871	193,032
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	167,795	125,931	117,117
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	86,843	81,622	74,002
Prior	567,995	326,407	299,203
Revolving Loans Amortized Cost Basis	115,434	113,427	122,933
Revolving Loan Converted to Term	0	0	0
Total	1,219,646	1,080,709	1,199,530
Current-period gross charge-offs
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loan Converted to Term	0
Total	0	0
Satisfactory | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	8,925	4,727	54,584
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	25,424	35,164	34,047
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	18,661	26,254	23,470
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	17,276	12,765	9,655
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	5,645	6,830	4,107
Prior	69,588	35,014	13,360
Revolving Loans Amortized Cost Basis	9,915	8,095	8,586
Revolving Loan Converted to Term	0	0	0
Total	155,434	128,849	147,809
Satisfactory | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	9,548	12,605	81,582
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	50,480	157,534	151,818
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	109,750	115,019	105,365
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	60,070	122,364	120,845
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	84,319	42,710	41,406
Prior	368,036	212,115	174,516
Revolving Loans Amortized Cost Basis	1,885	1,679	1,667
Revolving Loan Converted to Term	0	0	0
Total	684,088	664,026	677,199
Special mention | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	150	117
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	106	0	0
Prior	0	26	0
Revolving Loans Amortized Cost Basis	0	26	0
Revolving Loan Converted to Term	0	0	0
Total	106	202	117
Special mention | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	10,439
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	3,092	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0
Prior	15,380	5,043	4,084
Revolving Loans Amortized Cost Basis	0	0	0
Revolving Loan Converted to Term	0	0	0
Total	18,472	5,043	14,523
Substandard | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	230	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	420	0
Prior	3,129	3,420	3,199
Revolving Loans Amortized Cost Basis	3,720	2,796	5,099
Revolving Loan Converted to Term	0	0	0
Total	6,849	6,866	8,298
Substandard | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	150
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	149	10,150	9,169
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	9,038	0	1,670
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	1,670	5,472	2,533
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	2,328	806	791
Prior	35,102	29,832	38,955
Revolving Loans Amortized Cost Basis	122	28	497
Revolving Loan Converted to Term	0	0	0
Total	48,409	46,288	53,765
Doubtful | Commercial
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0
Prior	0	0	0
Revolving Loans Amortized Cost Basis	0	0	0
Revolving Loan Converted to Term	0	0	0
Total	0	0	0
Doubtful | Commercial Real Estate
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	0	0
Prior	0	0	0
Revolving Loans Amortized Cost Basis	0	0	0
Revolving Loan Converted to Term	0	0	0
Total	0	0	0
Performing | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	83,515	71,838	405,099
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	261,853	379,339	355,217
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	208,788	261,675	195,799
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	110,546	138,034	93,708
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	50,713	75,650	44,206
Prior	407,586	143,190	15,252
Revolving Loans Amortized Cost Basis	459	0	0
Revolving Loan Converted to Term	0	0	0
Total	1,123,460	1,069,726	1,109,281
Performing | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	12,555	15,565	161,878
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	82,726	219,336	231,365
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	185,667	197,436	192,588
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	166,141	124,992	116,451
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	86,843	80,986	73,875
Prior	564,901	323,945	296,935
Revolving Loans Amortized Cost Basis	115,104	113,220	122,573
Revolving Loan Converted to Term	0	0	0
Total	1,213,937	1,075,480	1,195,665
Nonperforming | Consumer
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	208
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	136	1,030	783
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	291	1,090	551
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	182	434	210
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	64	261	81
Prior	1,611	371	85
Revolving Loans Amortized Cost Basis	10	457	468
Revolving Loan Converted to Term	0	0	0
Total	2,294	3,643	2,386
Nonperforming | Residential
Total Loans
Financing receivable, excluding accrued interest, year one, originated, current fiscal year	0	0	0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year	189	550	0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year	442	435	444
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year	1,654	939	666
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year	0	636	127
Prior	3,094	2,462	2,268
Revolving Loans Amortized Cost Basis	330	207	360
Revolving Loan Converted to Term	0	0	0
Total	$ 5,709	$ 5,229	$ 3,865

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Short-Term Debt [Line Items]
BTFP Advances	$ 100,000	$ 0	$ 0
FHLBNY Overnight Advances	0	20,000	35,000
FHLBNY Term Advances	6,500	6,500	107,800
Total Borrowings	106,500	26,500	142,800
Federal Home Loan Bank of New York	604,729	576,602	778,368
Federal Funds Purchased
Short-Term Debt [Line Items]
Maximum Borrowing Capacity	28,000	28,000	52,000
Available Borrowing Capacity	28,000	28,000	52,000
Federal Home Loan Bank Advances
Short-Term Debt [Line Items]
Available Borrowing Capacity	553,229	550,102	535,568
Federal Reserve Bank Advances
Short-Term Debt [Line Items]
Maximum Borrowing Capacity	851,886	738,511	689,883
Available Borrowing Capacity	$ 751,886	$ 738,511	$ 689,883

Debt - Narrative (Details)

Debt - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) class subsidiaryBusinessTrust
Debt Instrument [Line Items]
Number of classes of financial instruments | class	2
Number of business subsidiary trusts | subsidiaryBusinessTrust	2
Interest Rate Swap
Debt Instrument [Line Items]
Amount of hedged item	$ 20
Federal Reserve Bank Advances
Debt Instrument [Line Items]
Collateral, at carrying cost	1,100
Collateral, at fair value	1,100
Bank Term Funding Program Advance
Debt Instrument [Line Items]
Proceeds from short-term debt	$ 100
Weighted average interest rate	4.76%
ACST III | London Interbank Offered Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2%
ACST III | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	2%
Junior Subordinated Debt, Preferred Securities | ACST II | London Interbank Offered Rate
Debt Instrument [Line Items]
Basis spread on variable rate	3.15%
Junior Subordinated Debt, Preferred Securities | ACST II | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	3.15%
Federal Home Loan Bank of New York
Debt Instrument [Line Items]
Collateral, at carrying cost	$ 875
Collateral, at fair value	$ 737

Debt - Maturities of Short Term

Debt - Maturities of Short Term Debt (Details) - Federal Home Loan Bank Advances - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Balances
First Year	$ 4,250	$ 4,250	$ 107,800
Second Year	2,250	2,250	0
Total Borrowings	$ 6,500	$ 6,500	$ 107,800
Weighted Average Rate
First Year	5.80%	5.80%	5.29%
Second Year	5.38%	5.38%	0%
Total	5.66%	5.66%	5.29%

Debt - Schedule of Long-Term De

Debt - Schedule of Long-Term Debt Instruments (Details) - Junior Subordinated Debt - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
ACST II
Debt Instrument [Line Items]
Face amount	$ 10,000,000	$ 10,000,000	$ 10,000,000
Variable Interest Rate	8.71%	8.74%	8.31%
Fixed Interest Rate resulting from cash flow hedge agreement	4%	4%	4%
ACST III
Debt Instrument [Line Items]
Face amount	$ 10,000,000	$ 10,000,000	$ 10,000,000
Variable Interest Rate	7.56%	7.59%	7.16%
Fixed Interest Rate resulting from cash flow hedge agreement	2.86%	2.86%	2.86%

Commitments and Contingencies -

Commitments and Contingencies - Commitments to Extend Credit and Letters of Credit (Details) $ in Thousands	Jun. 23, 2023 security	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)
Robert C. Ashe Litigation
Loan Commitments and Letters of Credit [Line Items]
Number of new claims filed | security	2
Commitments to Extend Credit
Loan Commitments and Letters of Credit [Line Items]
Notional Amount		$ 443,960	$ 444,256	$ 478,253
Fair Value		0	0	0
Standby Letters of Credit
Loan Commitments and Letters of Credit [Line Items]
Notional Amount		3,401	3,824	3,424
Fair Value		$ 2	$ 0	$ 6
Minimum | Standby Letters of Credit
Loan Commitments and Letters of Credit [Line Items]
Loan commitments, fixed fee percent		1%
Maximum | Standby Letters of Credit
Loan Commitments and Letters of Credit [Line Items]
Loan commitments, fixed fee percent		3%

Comprehensive Income - Schedule

Comprehensive Income - Schedule of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Before-Tax Amount
Other comprehensive income, before tax	$ 949	$ 7,644
Tax Benefit (Expense)
Other comprehensive income, tax	(247)	(1,972)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	860	5,506
Reclassification from AOCI, current period	(158)	166
Other Comprehensive Income	702	5,672
Net Unrealized Securities Holding Loss on Securities Available-for-Sale Arising During the Period
Before-Tax Amount
OCI, before reclassifications	(2,062)	8,219
Tax Benefit (Expense)
Other comprehensive (loss) income before reclassifications, tax	532	(2,120)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	(1,530)	6,099
Reclassification from AOCI, current period	0	0
Other Comprehensive Income	(1,530)	6,099
Unrealized Gain on Cash Flow Swap
Before-Tax Amount
OCI, before reclassifications	3,221	(800)
Reclassification from AOCI, current period	(213)	198
Tax Benefit (Expense)
Other comprehensive (loss) income before reclassifications, tax	(831)	207
Reclassification from AOCI, current period	55	(51)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	2,390	(593)
Reclassification from AOCI, current period	(158)	147
Other Comprehensive Income	2,232	(446)
Amortization of Net Retirement Plan Actuarial Gain
Before-Tax Amount
Reclassification from AOCI, current period	(66)	(25)
Tax Benefit (Expense)
Reclassification from AOCI, current period	16	7
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0
Reclassification from AOCI, current period	(50)	(18)
Other Comprehensive Income	(50)	(18)
Amortization of Net Retirement Plan Prior Service Cost
Before-Tax Amount
Reclassification from AOCI, current period	69	52
Tax Benefit (Expense)
Reclassification from AOCI, current period	(19)	(15)
Net-of-Tax Amount
Other comprehensive (loss) income before reclassifications	0	0
Reclassification from AOCI, current period	50	37
Other Comprehensive Income	$ 50	$ 37

Comprehensive Income - Changes

Comprehensive Income - Changes in Accumulated Other Comprehensive Income By Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 379,772	$ 353,538
Other comprehensive income or loss before reclassifications	860	5,506
Amounts reclassified from accumulated other comprehensive income or loss	(158)	166
Other Comprehensive Income	702	5,672
Ending balance	377,986	363,371
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(33,416)	(49,655)
Other Comprehensive Income	702	5,672
Ending balance	(32,714)	(43,983)
Net Unrealized Securities Holding Loss on Securities Available-for-Sale Arising During the Period
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(31,648)	(48,841)
Other comprehensive income or loss before reclassifications	(1,530)	6,099
Amounts reclassified from accumulated other comprehensive income or loss	0	0
Other Comprehensive Income	(1,530)	6,099
Ending balance	(33,178)	(42,742)
Unrealized Gain on Cash Flow Swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	1,711	4,054
Other comprehensive income or loss before reclassifications	2,390	(593)
Amounts reclassified from accumulated other comprehensive income or loss	(158)	147
Other Comprehensive Income	2,232	(446)
Ending balance	3,943	3,608
Net Actuarial Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,839)	(4,467)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	(50)	(18)
Other Comprehensive Income	(50)	(18)
Ending balance	(2,889)	(4,485)
Net Prior Service (Cost) Credit
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(640)	(401)
Other comprehensive income or loss before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income or loss	50	37
Other Comprehensive Income	50	37
Ending balance	$ (590)	$ (364)

Comprehensive Income - Reclassi

Comprehensive Income - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 20,222	$ 8,016
Salaries and Employee Benefits	12,893	11,947
Total before Tax	9,684	10,921
Provision for income taxes	(2,024)	(2,359)
Net Income	7,660	8,562
Amounts Reclassified from Accumulated Other Comprehensive Income | Unrealized Gain on Cash Flow Swap
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	213	(198)
Amounts Reclassified from Accumulated Other Comprehensive Income | Amortization of Net Retirement Plan Prior Service Cost
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Employee Benefits	(69)	(52)
Amounts Reclassified from Accumulated Other Comprehensive Income | Amortization of Defined Benefit Pension, Actuarial Loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Salaries and Employee Benefits	66	25
Amounts Reclassified from Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before Tax	210	(225)
Provision for income taxes	(52)	59
Net Income	$ 158	$ (166)

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - plan	1 Months Ended	3 Months Ended
	Oct. 31, 2023	Mar. 31, 2024	Sep. 26, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans		3
Stock dividend (in percent)			3%
Discount from market price, percent		5%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period (in years)		10 years
Award vesting period (in years)		4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Percentage of awards		100%
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount from market price, percent	10%	5%

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Shares
Outstanding, beginning of period (in shares) | shares	305,308
Exercised (in shares) | shares	(6,060)
Forfeited (in shares) | shares	(7,979)
Outstanding, end of period (in shares) | shares	291,269
Vested at period end (in shares) | shares	230,561
Expected to vest (in shares) | shares	60,708
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 28.96
Exercised (in dollars per share) | $ / shares	18.97
Forfeited (in dollars per share) | $ / shares	25.81
Outstanding, end of period (in dollars per share) | $ / shares	29.25
Vested at period end (in dollars per share) | $ / shares	28.65
Expected to vest (in dollars per share) | $ / shares	$ 31.54

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount expensed	$ 78	$ 85
Restricted Stock Units (RSU)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount expensed	$ 0	$ 37

Stock Based Compensation - Rest

Stock Based Compensation - Restricted Stock Units Information (Details) - Restricted Stock Units (RSU) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restricted Stock Units
Beginning balance, nonvested (in shares)		13,925
Granted (in shares)		5,164
Vested (in shares)		(4,307)
Ending balance, nonvested (in shares)		14,782
Weighted Average Grant Date Fair Value
Beginning balance, nonvested (in dollars per share)		$ 30.47
Granted (in dollars per share)		31.47
Vested (in dollars per share)		31.35
Ending balance, nonvested (in dollars per share)		$ 30.56
Amount expensed	$ 0	$ 37

Retirement Benefit Plans (Detai

Retirement Benefit Plans (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Interest credit under cash balance plan	0.03
Employer matching contribution, percent of match, maximum	5%
Defined benefit plan, service cost and interest cost			$ 3,300,000
Defined benefit plan, unamortized net loss			$ 7,200,000
Defined benefit plan, benefit obligation from lump sum payment to total benefit obligation ratio			8.06%
Defined benefit plan, net periodic benefit cost, loss due to settlement			$ 577,000
Employees' Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account				5.50%
Defined benefit plan, increase in benefit payable, percent	3%
Defined benefit plan, benefit obligation, increase (decrease) for plan amendment	$ 351,638
Defined benefit plan, amortization of service cost	9 years 8 months 12 days
Net Periodic Benefit Cost
Service Cost	$ 466,000	$ 413,000
Interest Cost	525,000	530,000
Expected Return on Plan Assets	(932,000)	(857,000)
Amortization of Prior Service Cost	33,000	16,000
Amortization of Net Loss (Gain)	0	36,000
Net Periodic Benefit Cost	92,000	138,000
Plan Contributions During the Period	0	0
Estimated Future Contributions in the Current Fiscal Year	$ 0
Select Executive Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account				5.76%
Defined benefit plan, amortization of service cost	12 years 6 months
Defined benefit plan, benefit obligation, period increase (decrease)	$ 122,797
Net Periodic Benefit Cost
Service Cost	17,000	163,000
Interest Cost	158,000	62,000
Expected Return on Plan Assets	0	0
Amortization of Prior Service Cost	10,000	10,000
Amortization of Net Loss (Gain)	21,000	18,000
Net Periodic Benefit Cost	206,000	253,000
Plan Contributions During the Period	127,000	116,000
Estimated Future Contributions in the Current Fiscal Year	382,000
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account				5.83%
Net Periodic Benefit Cost
Service Cost	15,000	18,000
Interest Cost	81,000	87,000
Expected Return on Plan Assets	0	0
Amortization of Prior Service Cost	26,000	26,000
Amortization of Net Loss (Gain)	(87,000)	(79,000)
Net Periodic Benefit Cost	35,000	52,000
Plan Contributions During the Period	27,000	$ 27,000
Estimated Future Contributions in the Current Fiscal Year	$ 82,000
Prior to January 1, 2003 | Minimum
Defined Benefit Plan Disclosure [Line Items]
Service credits, percent of eligible salaries	6%
Prior to January 1, 2003 | Maximum
Defined Benefit Plan Disclosure [Line Items]
Service credits, percent of eligible salaries	12%
On or Subsequent to January 1, 2003
Defined Benefit Plan Disclosure [Line Items]
Service credits, percent of eligible salaries	6%

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Sep. 26, 2023
Earnings Per Share [Abstract]
Stock dividend (in percent)				3%
Net Income		$ 7,660	$ 8,562
Weighted Average Shares - Basic (in shares)	[1]	16,865	17,048
Earnings Per Share - Basic (in dollars per share)		$ 0.45	$ 0.50
Dilutive Average Shares Attributable to Stock Options (in shares)		2	12
Weighted Average Shares - Diluted (in shares)	[1]	16,867	17,060
Earnings Per Share - Diluted (in dollars per share)		$ 0.45	$ 0.50
[1] 2023 Share and Per Share Amounts have been restated for the September 26, 2023 3% stock dividend.

Fair Values - Recurring and Non

Fair Values - Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities	$ 1,942	$ 1,925	$ 2,070
Available-for-Sale at Fair Value	485,833	497,769	565,693
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities	1,942	1,925	2,070
Total Securities Measured on a Recurring Basis	487,775	499,694	567,763
Derivative Assets	12,747	12,057	6,206
Total Measured on a Recurring Basis	500,522	511,751	573,969
Derivative Liabilities	7,317	9,598	6,206
Total Measured on a Recurring Basis	7,317	9,598	6,206
Available-for-Sale at Fair Value	485,833	497,769	565,693
Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities	0	0	0
Total Securities Measured on a Recurring Basis	0	0	0
Derivative Assets	0	0	0
Total Measured on a Recurring Basis	0	0	0
Derivative Liabilities	0	0	0
Total Measured on a Recurring Basis	0	0	0
Available-for-Sale at Fair Value	0	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities	1,942	1,925	2,070
Total Securities Measured on a Recurring Basis	487,775	499,694	567,763
Derivative Assets	12,747	12,057	6,206
Total Measured on a Recurring Basis	500,522	511,751	573,969
Derivative Liabilities	7,317	9,598	6,206
Total Measured on a Recurring Basis	7,317	9,598	6,206
Available-for-Sale at Fair Value	485,833	497,769	565,693
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities	0	0	0
Total Securities Measured on a Recurring Basis	0	0	0
Derivative Assets	0	0	0
Total Measured on a Recurring Basis	0	0	0
Derivative Liabilities	0	0	0
Total Measured on a Recurring Basis	0	0	0
Available-for-Sale at Fair Value	0	0	0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Evaluated Loans	0	0	0
Collateral Dependent Impaired Loans, Losses Recognized in Earnings
Other Real Estate Owned and Repossessed Assets, Net	312	312	144
Other Real Estate owned and Repossessed Assets, Net, Losses Recognized in Earnings	0	0	0
Fair Value, Measurements, Nonrecurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Evaluated Loans	0	0	0
Other Real Estate Owned and Repossessed Assets, Net	0	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Evaluated Loans	0	0	0
Other Real Estate Owned and Repossessed Assets, Net	0	0	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Evaluated Loans	0	0	0
Other Real Estate Owned and Repossessed Assets, Net	312	312	144
U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	74,152	74,004	0
U.S. Treasuries | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	74,152	74,004
U.S. Treasuries | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0
U.S. Treasuries | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	74,152	74,004
U.S. Treasuries | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0
U.S. Government & Agency Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	152,749	152,925	177,585
U.S. Government & Agency Obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	152,749	152,925	177,585
U.S. Government & Agency Obligations | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
U.S. Government & Agency Obligations | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	152,749	152,925	177,585
U.S. Government & Agency Obligations | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
State and Municipal Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	280	280	320
State and Municipal Obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	280	280	320
State and Municipal Obligations | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
State and Municipal Obligations | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	280	280	320
State and Municipal Obligations | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
Mortgage-Backed Securities - Residential | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	257,717	269,760	386,988
Mortgage-Backed Securities - Residential | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
Mortgage-Backed Securities - Residential | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	257,717	269,760	386,988
Mortgage-Backed Securities - Residential | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
Corporate and Other Debt Securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	935	800	800
Corporate and Other Debt Securities | Fair Value, Measurements, Recurring | Quoted Prices In Active Markets for Indentical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	0	0	0
Corporate and Other Debt Securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	935	800	800
Corporate and Other Debt Securities | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale at Fair Value	$ 0	$ 0	$ 0

Fair Values - Fair Value by Bal

Fair Values - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Carrying Value
Cash and Cash Equivalents	$ 282,465	$ 142,536	$ 203,472	$ 64,660
Securities Available-for-Sale	485,833	497,769	565,693
Held-To-Maturity Securities, at Amortized Cost	128,051	131,395	167,347
Equity Securities	1,942	1,925	2,070
Net Loans	3,227,197	3,181,643	2,974,568
Deposits	3,779,021	3,687,566	3,546,349
Borrowings	106,500	26,500	142,800
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Fair Value
Securities Available-for-Sale	485,833	497,769	565,693
Securities Held-to-Maturity	124,861	128,837	164,439
Equity Securities	1,942	1,925	2,070
Carrying Amount
Carrying Value
Cash and Cash Equivalents	282,465	142,536	203,472
Securities Available-for-Sale	485,833	497,769	565,693
Held-To-Maturity Securities, at Amortized Cost	128,051	131,395	167,347
Equity Securities	1,942	1,925	2,070
Federal Home Loan Bank and Federal Reserve Bank Stock	4,208	5,049	10,027
Net Loans	3,227,197	3,181,643	2,974,568
Accrued Interest Receivable	12,754	11,076	9,857
Derivative Assets	12,747	12,057	6,206
Deposits	3,779,021	3,687,566	3,546,349
Borrowings		26,500	107,800
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	7,996	6,289	1,170
Derivative Liabilities	7,317	9,598	6,206
Fair Value
Securities Available-for-Sale	485,833	497,769	565,693
Equity Securities	1,942	1,925	2,070
Derivative Assets	12,747	12,057	6,206
Derivative Liabilities	7,317	9,598	6,206
Fair Value
Carrying Value
Securities Available-for-Sale	485,833	497,769	565,693
Equity Securities	1,942	1,925	2,070
Derivative Assets	12,747	12,057	6,206
Derivative Liabilities	7,317	9,598	6,206
Fair Value
Cash and Cash Equivalents	282,465	142,536	203,472
Securities Available-for-Sale	485,833	497,769	565,693
Securities Held-to-Maturity	124,861	128,837	164,439
Equity Securities	1,942	1,925	2,070
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	4,208	5,049	10,027
Net Loans	2,978,789	2,940,318	2,705,312
Accrued Interest Receivable	12,754	11,076	9,857
Derivative Assets	12,747	12,057	6,206
Deposits	3,774,378	3,683,122	3,540,854
Borrowings	105,941
Borrowings		26,189	107,830
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	7,996	6,289	1,170
Derivative Liabilities	7,317	9,598	6,206
Quoted Prices In Active Markets for Indentical Assets (Level 1) | Fair Value
Carrying Value
Securities Available-for-Sale	0	0	0
Equity Securities	0		0
Derivative Assets		0	0
Derivative Liabilities	0	0	0
Fair Value
Cash and Cash Equivalents	282,465	142,536	203,472
Securities Available-for-Sale	0	0	0
Securities Held-to-Maturity	0	0	0
Equity Securities	0		0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	0	0	0
Net Loans	0	0	0
Accrued Interest Receivable	0	0	0
Derivative Assets		0	0
Deposits	0	0	0
Borrowings	0
Borrowings		0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	0	0	0
Accrued Interest Payable	0	0	0
Derivative Liabilities	0	0	0
Significant Other Observable Inputs (Level 2) | Fair Value
Carrying Value
Securities Available-for-Sale	485,833	497,769	565,693
Equity Securities	1,942	1,925	2,070
Derivative Assets	12,747	12,057	6,206
Derivative Liabilities	7,317	9,598	6,206
Fair Value
Cash and Cash Equivalents	0	0	0
Securities Available-for-Sale	485,833	497,769	565,693
Securities Held-to-Maturity	124,861	128,837	164,439
Equity Securities	1,942	1,925	2,070
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	4,208	5,049	10,027
Net Loans	0	0	0
Accrued Interest Receivable	12,754	11,076	9,857
Derivative Assets	12,747	12,057	6,206
Deposits	3,774,378	3,683,122	3,540,854
Borrowings	105,941
Borrowings		26,189	107,830
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	7,996	6,289	1,170
Derivative Liabilities	7,317	9,598	6,206
Significant Unobservable Inputs (Level 3) | Fair Value
Carrying Value
Securities Available-for-Sale	0	0	0
Equity Securities	0
Derivative Assets		0	0
Derivative Liabilities	0	0	0
Fair Value
Cash and Cash Equivalents	0	0	0
Securities Available-for-Sale	0	0	0
Securities Held-to-Maturity	0	0	0
Equity Securities	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	0	0	0
Net Loans	2,978,789	2,940,318	2,705,312
Accrued Interest Receivable	0	0	0
Derivative Assets		0	0
Deposits	0	0	0
Borrowings	0
Borrowings		0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	0	0	0
Accrued Interest Payable	0	0	0
Derivative Liabilities	$ 0	$ 0	$ 0

Leases - Narrative (Details)

Leases - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 office bank
Leases [Abstract]
Number of branch offices | office	2
Number of banks | bank	2

Leases - Quantitative Lease Dat

Leases - Quantitative Lease Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Finance Lease Amounts:
Right-of-Use Assets	$ 4,416	$ 4,593
Lease Liabilities	5,053	5,106	$ 5,066
Operating Lease Amounts:
Right-of-Use Assets	4,790	5,388
Lease Liabilities	4,997	5,584
Cash Paid For Amounts Included In The Measurement Of Lease Liabilities:
Operating Outgoing Cash Flows From Finance Leases	48	49
Operating Outgoing Cash Flows From Operating Leases	155	257
Financing Outgoing Cash Flows From Finance Leases	13	13
Right-of-Use Assets Obtained In Exchange For New Finance Lease Liabilities	0	0
Right-of-Use Assets Obtained In Exchange For New Operating Lease Liabilities	$ 0	$ 19
Weighted-average Remaining Lease Term - Finance Leases (Yrs.)	26 years 14 days	27 years
Weighted-average Remaining Lease Term - Operating Leases (Yrs.)	11 years 21 days	11 years 5 months 12 days
Weighted-average Discount Rate—Finance Leases	3.75%	3.75%
Weighted-average Discount Rate—Operating Leases	3.10%	2.97%
Finance Lease Cost:
Reduction of Right-of-Use Assets	$ 44	$ 44
Interest on Lease Liabilities	48	49
Operating Lease Cost	195	298
Short-term Lease Cost	10	14
Variable Lease Cost	75	73
Total Lease Cost	$ 372	$ 478

Leases - Future Lease Payments

Leases - Future Lease Payments on Finance and Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Operating Leases
2024	$ 720
2025	671
2026	607
2027	537
2028	489
Thereafter	2,967
Total Undiscounted Cash Flows	5,991
Less: Net Present Value Adjustment	994
Lease Liabilities	4,997		$ 5,584
Financing Leases
2024	254
2025	264
2026	268
2027	268
2028	268
Thereafter	6,929
Total Undiscounted Cash Flows	8,251
Less: Net Present Value Adjustment	3,198
Lease Liabilities	$ 5,053	$ 5,066	$ 5,106

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements And Fair Value Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Not Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Assets	$ 6,111	$ 6,208	$ 6,206
Derivative Liabilities	6,111	6,208	6,206
Notional amount	107,991	123,197	126,637
Designated as Hedging Instrument | Fair Value Swap
Derivative [Line Items]
Derivative Assets	0	0	0
Derivative Liabilities	1,109	5,678	0
Notional amount	$ 300,000	$ 300,000	$ 0

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Narrative (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) security	Sep. 30, 2023 USD ($) security	Mar. 31, 2023 USD ($)
Fair Value Swap | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	$ 300,000	$ 300,000		$ 0
Fair Value Swap | Fair Value Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Number of instruments held | security			2
Fair Value Swap, 1 | Fair Value Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount			$ 250,000
Fair Value Swap, 2 | Fair Value Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount			$ 50,000
Interest Rate Swap
Derivative [Line Items]
Amount of hedged item	$ 20,000
Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Number of instruments held | security		2
Interest Rate Swap 1 | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount		$ 100,000
Interest Rate Swap 2 | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount		$ 75,000

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Fair Value Hedging Relationships Recognized On Statement Of Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Hedged Asset	$ 1,243	$ 0	$ 5,849
Fair value derivative designated as hedging instrument	(1,255)	0	(5,828)
Total (loss) gain recognized in the consolidated statements of income with interest and fees on loans	$ (12)	$ 0	$ 21

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Fair Value Swap Agreements (Details) - Fair Value Swap - Fair Value Hedging - Designated as Hedging Instrument - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Derivative [Line Items]
Carrying Value of Portfolio Layer Method Hedged Asset	$ 301,243	$ 305,849	$ 0
Cumulative Fair Value Hedging Adjustment	$ 1,243	$ 5,849	$ 0

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Cash Flow Hedge Agreements (Details) - Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
2023 Interest Rate Swaps
Derivative [Line Items]
Derivative Liabilities	$ 97	$ 0	$ 2,710
Amount of (loss) gain recognized in AOCI	3,068	0	(2,553)
Amount of loss reclassified from AOCI interest expense	455	0	157
Interest Rate Swap, Subordinated Trust Securities
Derivative [Line Items]
Derivative Assets	5,393	4,843	4,998
Amount of (loss) gain recognized in AOCI	153	(800)	(1,355)
Amount of loss reclassified from AOCI interest expense	$ (242)	$ (198)	$ (907)