XML 44 R34.htm IDEA: XBRL DOCUMENT v3.22.2

Basis of Presentation and Nature of Operations (Details)	6 Months Ended
	Jun. 30, 2022 bank
Business Acquisition [Line Items]
Number of community banking office locations, ACNB	31
Adams, Cumberland, Franklin and York Counties, Pennsylvania
Business Acquisition [Line Items]
Number of community banking office locations, ACNB	20
Carroll and Frederick Counties, Maryland
Business Acquisition [Line Items]
Number of community banking office locations, ACNB	11

X

- Definition

Number of Community Banking Offices, Parent

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_StatementGeographicalAxis=acnb_AdamsCumberlandFranklinAndYorkCountiesPennsylvaniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=acnb_CarrollAndFrederickCountiesMarylandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: