$ACNB
ACNB CORP Stock $acnb

$acnb Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000071557921000076 Filed on November 03, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue		$19.48M	$21.32M
YoY Change		-8.64%	20.49%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$860.0K	$850.0K	$820.0K
YoY Change	-4.44%	3.66%	22.39%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$1.482M	$2.958M
YoY Change		-49.9%	11.54%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$5.530M	$9.298M	$8.518M
YoY Change	-37.09%	9.16%	8.34%
Income Tax	$1.030M	$1.940M	$1.750M
% Of Pretax Income	18.63%	20.86%	20.54%
Net Earnings	$4.500M	$7.360M	$6.771M
YoY Change	-36.17%	8.7%	7.31%
Net Earnings / Revenue		37.78%	31.75%
Basic Earnings Per Share		$0.84	$0.79
Diluted Earnings Per Share	$499.4K	$844.0K	$779.1K
COMMON SHARES
Basic Shares Outstanding	8.695M shares	8.721M shares	8.695M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$710.1M	$722.8M	$299.7M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$30.98M	$31.67M	$33.18M
YoY Change	-6.16%	-4.56%	30.57%
Goodwill	$42.11M	$42.11M	$42.11M
YoY Change	0.0%	0.0%	115.06%
Intangibles	$6.101M	$6.387M	$7.578M
YoY Change	-16.02%	-15.72%	65.46%
Long-Term Investments
YoY Change
Other Assets	$1.100M
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.787B	$2.793B	$2.503B
YoY Change	9.06%	11.58%	44.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$3.300M	$3.400M	$3.300M
YoY Change	6.45%	3.03%	-10.81%
Deferred Revenue
YoY Change
Short-Term Debt	$35.20M	$44.61M	$52.72M
YoY Change	-8.48%	-15.39%	27.01%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$3.300M	$3.400M	$3.300M
YoY Change	6.45%	3.03%	-10.81%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$15.30M	$15.70M	$17.60M
YoY Change	-7.27%	-10.8%	18.12%
Total Long-Term Liabilities	$15.30M	$15.70M	$17.60M
YoY Change	-7.27%	-10.8%	18.12%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.300M	$3.400M	$3.300M
Total Long-Term Liabilities	$15.30M	$15.70M	$17.60M
Total Liabilities	$2.515B	$2.523B	$2.246B
YoY Change	9.47%	12.31%	44.95%
SHAREHOLDERS EQUITY
Retained Earnings	$167.2M	$165.0M	$143.5M
YoY Change	12.72%	14.98%	6.02%
Common Stock	$116.7M	$116.5M	$115.8M
YoY Change	0.6%	0.6%	102.23%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.245M	$1.148M	$728.0K
YoY Change	208.38%	57.69%	0.0%
Treasury Stock Shares	116.7K shares	77.70K shares	62.60K shares
Shareholders Equity	$272.1M	$269.8M	$256.7M
YoY Change
Total Liabilities & Shareholders Equity	$2.787B	$2.793B	$2.503B
YoY Change	9.06%	11.58%	44.2%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$4.500M	$7.360M	$6.771M
YoY Change	-36.17%	8.7%	7.31%
Depreciation, Depletion And Amortization	$860.0K	$850.0K	$820.0K
YoY Change	-4.44%	3.66%	22.39%
Cash From Operating Activities	$8.310M	$8.650M	$1.590M
YoY Change	13.06%	444.03%	-76.92%
INVESTING ACTIVITIES
Capital Expenditures	-$1.050M	$277.0K	$36.00K
YoY Change	144.19%	669.44%	-89.09%
Acquisitions
YoY Change
Other Investing Activities	-$9.000M	$42.76M	-$22.32M
YoY Change	-121.2%	-291.58%	45.6%
Cash From Investing Activities	-$10.05M	$42.48M	-$22.35M
YoY Change	-123.91%	-290.07%	42.72%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-10.92M	78.79M	88.19M
YoY Change	-121.71%	-10.66%	76.8%
NET CHANGE
Cash From Operating Activities	8.310M	8.650M	1.590M
Cash From Investing Activities	-10.05M	42.48M	-22.35M
Cash From Financing Activities	-10.92M	78.79M	88.19M
Net Change In Cash	-12.66M	129.9M	67.43M
YoY Change	-112.7%	92.67%	64.02%
FREE CASH FLOW
Cash From Operating Activities	$8.310M	$8.650M	$1.590M
Capital Expenditures	-$1.050M	$277.0K	$36.00K
Free Cash Flow	$9.360M	$8.373M	$1.554M
YoY Change	20.31%	438.8%	-76.31%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
	dei	Entity Central Index Key EntityCentralIndexKey	0000715579
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Type DocumentType	10-Q
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-35015
	dei	Entity Registrant Name EntityRegistrantName	ACNB CORP
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-2233457
	dei	Entity Address Address Line1 EntityAddressAddressLine1	16 Lincoln Square
	dei	Entity Address City Or Town EntityAddressCityOrTown	Gettysburg
	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	17325
	dei	City Area Code CityAreaCode	717
	dei	Local Phone Number LocalPhoneNumber	334-3161
	dei	Security12b Title Security12bTitle	Common Stock, $2.50 par value per share
	dei	Trading Symbol TradingSymbol	ACNB
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	44000	USD
CY2021Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	387000	USD
CY2020Q3	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	445000	USD
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	1535000	USD
	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	1442000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	1482000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	2958000	USD
	us-gaap	Interest Expense InterestExpense	5591000	USD
	us-gaap	Interest Expense InterestExpense	9652000	USD
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	18000000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	18366000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	53894000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	54166000	USD
CY2021Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1550000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	50000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	8100000	USD
CY2021Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	18000000	USD
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	16816000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	53844000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	46066000	USD
CY2021Q3	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1715000	USD
CY2020Q3	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	1688000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	4951000	USD
	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	4745000	USD
CY2021Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	356000	USD
CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	365000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1066000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1090000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-82000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	377000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-483000	USD
CY2021Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	304000	USD
CY2020Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	319000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	925000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	837000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	5274000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	5012000	USD
	us-gaap	Noninterest Income NoninterestIncome	17143000	USD
	us-gaap	Noninterest Income NoninterestIncome	14071000	USD
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	8921000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	8625000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	26259000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	25731000	USD
CY2021Q3	us-gaap	Occupancy Net OccupancyNet	974000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	857000	USD
	us-gaap	Occupancy Net OccupancyNet	3046000	USD
	us-gaap	Occupancy Net OccupancyNet	2709000	USD
CY2021Q3	us-gaap	Equipment Expense EquipmentExpense	1181000	USD
CY2020Q3	us-gaap	Equipment Expense EquipmentExpense	1284000	USD
	us-gaap	Equipment Expense EquipmentExpense	3783000	USD
	us-gaap	Equipment Expense EquipmentExpense	4039000	USD
CY2021Q3	us-gaap	Taxes Other TaxesOther	393000	USD
CY2020Q3	us-gaap	Taxes Other TaxesOther	321000	USD
	us-gaap	Taxes Other TaxesOther	1177000	USD
	us-gaap	Taxes Other TaxesOther	967000	USD
CY2021Q3	us-gaap	Professional Fees ProfessionalFees	422000	USD
CY2020Q3	us-gaap	Professional Fees ProfessionalFees	265000	USD
	us-gaap	Professional Fees ProfessionalFees	890000	USD
	us-gaap	Professional Fees ProfessionalFees	921000	USD
CY2021Q3	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	198000	USD
CY2020Q3	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	145000	USD
	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	539000	USD
	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	554000	USD
CY2021Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	81000	USD
CY2020Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	101000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	220000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	442000	USD
CY2021Q3	acnb	Fdic And Regulatory FdicAndRegulatory	247000	USD
CY2020Q3	acnb	Fdic And Regulatory FdicAndRegulatory	211000	USD
	acnb	Fdic And Regulatory FdicAndRegulatory	705000	USD
	acnb	Fdic And Regulatory FdicAndRegulatory	397000	USD
CY2021Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2020Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	5965000	USD
CY2021Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	285000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	313000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	878000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	951000	USD
CY2021Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	88000	USD
CY2020Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	89000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	90000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	182000	USD
CY2021Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1362000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1277000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4087000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3728000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	13976000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	13310000	USD
	us-gaap	Noninterest Expense NoninterestExpense	41494000	USD
	us-gaap	Noninterest Expense NoninterestExpense	46222000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9298000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8518000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	29493000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13915000	USD
CY2021Q3	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1938000	USD
CY2020Q3	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1747000	USD
	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6154000	USD
	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2570000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	7360000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	6771000	USD
	us-gaap	Net Income Loss NetIncomeLoss	23339000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11345000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.67
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.32
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.77
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.75
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	7360000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	6771000	USD
	us-gaap	Net Income Loss NetIncomeLoss	23339000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11345000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-484000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-102000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1600000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1025000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1695000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-358000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-5598000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3613000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	69000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	37000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	208000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	113000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	245000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	132000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	733000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	394000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1450000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-226000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4865000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4007000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5910000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6545000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	18474000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	15352000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	257972000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	7471000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5835000	USD
CY2021Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	5627	shares
CY2021Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-181000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	362000	USD
CY2021Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2177000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	257612000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	8508000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2420000	USD
CY2021Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	6328	shares
CY2021Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	179000	USD
CY2021Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2353000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	266366000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	7360000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1450000	USD
CY2021Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	5942	shares
CY2021Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	164000	USD
CY2021Q3	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	15101	shares
CY2021Q3	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	420000	USD
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2180000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	269840000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	189516000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-1223000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3333000	USD
CY2020Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	1590547	shares
CY2020Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	57273000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	262000	USD
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2167000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	246994000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	5797000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	900000	USD
CY2020Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	6461	shares
CY2020Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	170000	USD
CY2020Q2	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	19472	shares
CY2020Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	331000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	166000	USD
CY2020Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2168000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	252190000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	6771000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-226000	USD
CY2020Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	7474	shares
CY2020Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	162000	USD
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2174000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	256723000	USD
	us-gaap	Net Income Loss NetIncomeLoss	23339000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11345000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2497000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1279000	USD
	acnb	Gain Loss On Sales Of Loans Property And Foreclosed Real Estate GainLossOnSalesOfLoansPropertyAndForeclosedRealEstate	88000	USD
	acnb	Gain Loss On Sales Of Loans Property And Foreclosed Real Estate GainLossOnSalesOfLoansPropertyAndForeclosedRealEstate	80000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	41000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1066000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1090000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	377000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-483000	USD
	us-gaap	Restricted Stock Expense RestrictedStockExpense	362000	USD
	us-gaap	Restricted Stock Expense RestrictedStockExpense	428000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2582000	USD
	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2745000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	50000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8100000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1458000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-597000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-1204000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1991000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1017000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-896000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	89285000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	92681000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	98881000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	90373000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1416000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2763000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	221000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1635000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1505000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	936000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	33815000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	18118000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	3074000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	5628000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	81260000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	39056000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	163874000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	135939000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-574000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-1763000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-149662000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	101840000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	400000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	acnb	Paymentsto Acquire Insurance Bookof Business PaymentstoAcquireInsuranceBookofBusiness	542000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-35262000	USD
	acnb	Paymentsto Acquire Insurance Bookof Business PaymentstoAcquireInsuranceBookofBusiness	0	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	530000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	622000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	213000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	392000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	189000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	363000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	70568000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-156879000	USD
	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	54099000	USD
	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	126463000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	177937000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	202795000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	6141000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	19286000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	15000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	27045000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	18633000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6710000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6509000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	420000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	45000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	656000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	219047000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	324058000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	323430000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	185297000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	399352000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	114356000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	722782000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	299653000	USD
	us-gaap	Interest Paid Net InterestPaidNet	6608000	USD
	us-gaap	Interest Paid Net InterestPaidNet	10548000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	6200000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	4150000	USD
	acnb	Transferof Portfolio Loansand Leasesto Heldforsale Including Other Foreclosed Transactions TransferofPortfolioLoansandLeasestoHeldforsaleIncludingOtherForeclosedTransactions	101000	USD
	acnb	Transferof Portfolio Loansand Leasesto Heldforsale Including Other Foreclosed Transactions TransferofPortfolioLoansandLeasestoHeldforsaleIncludingOtherForeclosedTransactions	135000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	22167000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Accounts Receivable Acquired1 NoncashOrPartNoncashAcquisitionAccountsReceivableAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Accounts Receivable Acquired1 NoncashOrPartNoncashAcquisitionAccountsReceivableAcquired1	333362000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	10959000	USD
	acnb	Noncashor Part Noncash Acquisition Investmentin Bank Owned Life Insurance Acquired NoncashorPartNoncashAcquisitionInvestmentinBankOwnedLifeInsuranceAcquired	0	USD
	acnb	Noncashor Part Noncash Acquisition Investmentin Bank Owned Life Insurance Acquired NoncashorPartNoncashAcquisitionInvestmentinBankOwnedLifeInsuranceAcquired	10896000	USD
	acnb	Noncashor Part Noncash Acquisition Restricted Investmentsin Bank Stocks NoncashorPartNoncashAcquisitionRestrictedInvestmentsinBankStocks	0	USD
	acnb	Noncashor Part Noncash Acquisition Restricted Investmentsin Bank Stocks NoncashorPartNoncashAcquisitionRestrictedInvestmentsinBankStocks	1141000	USD
	acnb	Noncashor Part Noncash Acquisition Foreclosed Assets Heldfor Resale Acquired NoncashorPartNoncashAcquisitionForeclosedAssetsHeldforResaleAcquired	0	USD
	acnb	Noncashor Part Noncash Acquisition Foreclosed Assets Heldfor Resale Acquired NoncashorPartNoncashAcquisitionForeclosedAssetsHeldforResaleAcquired	464000	USD
	acnb	Noncashor Part Noncash Acquisition Goodwill Acquired NoncashorPartNoncashAcquisitionGoodwillAcquired	0	USD
	acnb	Noncashor Part Noncash Acquisition Goodwill Acquired NoncashorPartNoncashAcquisitionGoodwillAcquired	22528000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	3560000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Other Assets Acquired1 NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Other Assets Acquired1 NoncashOrPartNoncashAcquisitionOtherAssetsAcquired1	3086000	USD
	acnb	Noncashor Part Noncash Acquisition Noninterest Bearing Deposits Acquired NoncashorPartNoncashAcquisitionNoninterestBearingDepositsAcquired	0	USD
	acnb	Noncashor Part Noncash Acquisition Noninterest Bearing Deposits Acquired NoncashorPartNoncashAcquisitionNoninterestBearingDepositsAcquired	103492000	USD
	acnb	Noncashor Part Noncash Acquisition Interest Bearing Deposits Acquired NoncashorPartNoncashAcquisitionInterestBearingDepositsAcquired	0	USD
	acnb	Noncashor Part Noncash Acquisition Interest Bearing Deposits Acquired NoncashorPartNoncashAcquisitionInterestBearingDepositsAcquired	270566000	USD
	acnb	Noncashor Part Noncash Acquisition Trust Preferred Debentures Acquired NoncashorPartNoncashAcquisitionTrustPreferredDebenturesAcquired	0	USD
	acnb	Noncashor Part Noncash Acquisition Trust Preferred Debentures Acquired NoncashorPartNoncashAcquisitionTrustPreferredDebenturesAcquired	6000000	USD
	acnb	Noncashor Part Noncash Acquisition Long Term Debt Assumed NoncashorPartNoncashAcquisitionLongTermDebtAssumed	0	USD
	acnb	Noncashor Part Noncash Acquisition Long Term Debt Assumed NoncashorPartNoncashAcquisitionLongTermDebtAssumed	3450000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Other Liabilities Assumed1 NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Other Liabilities Assumed1 NoncashOrPartNoncashAcquisitionOtherLiabilitiesAssumed1	2637000	USD
	acnb	Noncashor Part Noncash Acquisition Noncash Financialor Equity Instrument Consideration Shares Issued Value NoncashorPartNoncashAcquisitionNoncashFinancialorEquityInstrumentConsiderationSharesIssuedValue	0	USD
	acnb	Noncashor Part Noncash Acquisition Noncash Financialor Equity Instrument Consideration Shares Issued Value NoncashorPartNoncashAcquisitionNoncashFinancialorEquityInstrumentConsiderationSharesIssuedValue	57280000	USD
	acnb	Numberof Community Banking Offices Parent NumberofCommunityBankingOfficesParent	31	bank
CY2020Q1	acnb	Business Combination Acquired Receivables Interest Rate Fair Value Adjustments BusinessCombinationAcquiredReceivablesInterestRateFairValueAdjustments	2600000	USD
CY2020Q1	acnb	Business Combination Acquired Receivables Credit Fair Value Adjustments BusinessCombinationAcquiredReceivablesCreditFairValueAdjustments	5300000	USD
CY2020Q1	us-gaap	Liabilities Fair Value Adjustment LiabilitiesFairValueAdjustment	854000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	72281000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	22138000	USD
CY2020Q1	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	6000000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8715767	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8616588	shares
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8720732	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8694620	shares
CY2019Q1	acnb	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Other Than Options Authorizedbutnot Issued SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAuthorizedbutnotIssued	174055	shares
CY2021Q3	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	220000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	188000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	660000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	564000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	236000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	270000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	708000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	810000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	704000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	687000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2112000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	2061000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-314000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-169000	USD
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-942000	USD
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-507000	USD
CY2021Q3	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	66000	USD
CY2020Q3	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-60000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	198000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-180000	USD
CY2021Q3	acnb	Number Of Active Vested Terminated And Retired Persons In Plan NumberOfActiveVestedTerminatedAndRetiredPersonsInPlan	347	person
	us-gaap	Line Of Credit Facility Expiration Period LineOfCreditFacilityExpirationPeriod	P1Y
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
	acnb	Net Interest Income And Other Income From External Customers NetInterestIncomeAndOtherIncomeFromExternalCustomers	71037000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	29493000	USD
CY2021Q3	us-gaap	Assets Assets	2792792000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	530000	USD
	acnb	Net Interest Income And Other Income From External Customers NetInterestIncomeAndOtherIncomeFromExternalCustomers	68237000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13915000	USD
CY2020Q3	us-gaap	Assets Assets	2503049000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	622000	USD
CY2021Q3	acnb	Net Interest Income And Other Income From External Customers NetInterestIncomeAndOtherIncomeFromExternalCustomers	23274000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9298000	USD
CY2021Q3	us-gaap	Assets Assets	2792792000	USD
CY2021Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	277000	USD
CY2020Q3	acnb	Net Interest Income And Other Income From External Customers NetInterestIncomeAndOtherIncomeFromExternalCustomers	23378000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8518000	USD
CY2020Q3	us-gaap	Assets Assets	2503049000	USD
CY2020Q3	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	36000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	412901000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3406000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4631000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	411676000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	331745000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6248000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	275000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	337718000	USD
CY2021Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7220000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	262000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7482000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	10294000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	474000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	10768000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	2170000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	397000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	20000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	2547000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	2363000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	25000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	508000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	1880000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	2363000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	25000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	218000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	2170000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	250169000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4049000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	18628000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	582000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	268797000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	4631000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	46749000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	275000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	46749000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	275000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	301201000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	0	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	29292000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	29505000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	67854000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	68105000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	136154000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	134047000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	47527000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	47020000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	132074000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	132999000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	7220000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	7482000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	412901000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	411676000	USD
CY2021Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7220000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7482000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	362378000	USD
	acnb	Numberof Minimum Monthsfor Corporationto Order Updated Valuation NumberofMinimumMonthsforCorporationtoOrderUpdatedValuation	P18M
CY2021Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	1486886000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1637784000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2343000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2343000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1340000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	6875000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	7845000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	4759000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	4759000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1382000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5962000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	5962000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3144000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	0	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	6838000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	46000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2236000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	0	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	7394000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	45000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3616000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	20000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	6892000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	140000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1414000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	0	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	7472000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	167000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	5000000.0	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5618000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	7041000	USD
CY2021Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3679000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3850000	USD
	acnb	Financing Receivable Modifications Subsequent Default Periodic Late Payments FinancingReceivableModificationsSubsequentDefaultPeriodicLatePayments	1	Contract
	acnb	Financing Receivable Modifications Subsequent Default Numberof Contractswith Active Forbearance Agreements FinancingReceivableModificationsSubsequentDefaultNumberofContractswithActiveForbearanceAgreements	0
CY2021Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	527000	USD
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	391000	USD
CY2021Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	1486886000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	430000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1637784000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	855000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20207000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1097000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	31000	USD
CY2021Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19141000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20226000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1192000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	57000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	50000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19141000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1340000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	17801000	USD
CY2021Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	1486886000	USD
CY2021Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	9218000	USD
CY2021Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1477668000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	18353000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	752000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	49000	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1550000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19200000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	13835000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2876000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	141000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	8100000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19200000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	236000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	18964000	USD
CY2020Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	1700883000	USD
CY2020Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10592000	USD
CY2020Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1690291000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20226000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1382000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	18844000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1637784000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10721000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1627063000	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	44605000	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	44605000	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	44605000	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash	0	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	38464000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	38464000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	38464000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Cash SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimCash	0	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	48058000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	54680000	USD
CY2021Q3	us-gaap	Financial Assets Sold Under Agreements To Repurchase Gross Including Not Subject To Master Netting Arrangement FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	44605000	USD
CY2021Q3	us-gaap	Long Term Debt LongTermDebt	41700000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	53745000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	42108000	USD
CY2021Q3	us-gaap	Assets Held In Trust AssetsHeldInTrust	496780000	USD
CY2020Q3	us-gaap	Assets Held In Trust AssetsHeldInTrust	399544000	USD

Files In Submission

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$ACNB
ACNB CORP Stock $acnb

2021 Q4 Form 10-Q Financial Statement

#000071557921000076 Filed on November 03, 2021

Income Statement

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Cashflow Statement

Facts In Submission

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$ACNB ACNB CORP Stock $acnb

2021 Q4 Form 10-Q Financial Statement

#000071557921000076 Filed on November 03, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ACNB
ACNB CORP Stock $acnb