XML 76 R62.htm IDEA: XBRL DOCUMENT v3.20.4

LOANS AND ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructurings) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) Contract	Dec. 31, 2019 USD ($) Contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans, balance	$ 3,807,000	$ 3,974,000
Number of troubled debt restructured loan paid off | Contract		1
Number of loans which has periodic late payments | Contract	1
Mortgage loans in process of foreclosure	$ 391,000	$ 822,000
Entity Loan Modification Program
Financing Receivable, Troubled Debt Restructuring [Line Items]
Proceeds from paid off troubled debt restructured loans		2,198,000
Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans, balance	127,000	191,000
Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans, balance	$ 3,680,000	$ 3,783,000

X

- Definition

Financing Receivable, Modifications, Subsequent Default, Number of Contracts Paid in Full

+ References

No definition available.

+ Details

Name:	acnb_FinancingReceivableModificationsSubsequentDefaultNumberofContractsPaidinFull
Namespace Prefix:	acnb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Financing Receivable Modifications Subsequent Default Periodic Late Payments

+ References

No definition available.

+ Details

Name:	acnb_FinancingReceivableModificationsSubsequentDefaultPeriodicLatePayments
Namespace Prefix:	acnb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL49126937-111524

+ Details

Name:	us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Cash received from principal payments made on loans related to operating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585

+ Details

Name:	us-gaap_ProceedsFromLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_LoanRestructuringModificationNameAxis=us-gaap_EntityLoanModificationProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=acnb_NonaccrualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=acnb_AccrualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: