XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.20.2

Securities - Schedule of Required Fair Value Disclosures for Equity Securities (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward] |  |  |
Fair value at beginning of period | $ 2,106 | $ 1,839 | $ 1,839
Fair value at beginning of period, including equity securities acquired in business combination |  |  | 2,363
Unrealized Gains | 25 | 162 | 267
Unrealized Losses | 426 | 0 | 0
Fair value at end of period | 1,962 | 2,001 | 2,106
CRA Mutual Fund |  |  |
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward] |  |  |
Fair value at beginning of period | 1,045 | 1,012 | 1,012
Fair value at beginning of period, including equity securities acquired in business combination |  |  | 1,045
Unrealized Gains | 25 | 30 | 33
Unrealized Losses | 0 | 0 | 0
Fair value at end of period | 1,070 | 1,042 | 1,045
Stock in other banks |  |  |
Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward] |  |  |
Fair value at beginning of period | 1,061 | 827 | 827
Fair value at beginning of period, including equity securities acquired in business combination |  |  | 1,318
Unrealized Gains | 0 | 132 | 234
Unrealized Losses | 426 | 0 | 0
Fair value at end of period | $ 892 | $ 959 | $ 1,061

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), including equity securities acquired in business combination. + References No definition available. + Details
Name: | acnb_EquitySecuritiesFVNIIncludingEquitySecuritiesAcquiredinBusinessCombination
Namespace Prefix: | acnb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity Securities, FV-NI, Realized Gain (Loss) [Roll Forward] + References No definition available. + Details
Name: | acnb_EquitySecuritiesFVNIRealizedGainLossRollForward
Namespace Prefix: | acnb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740 + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117546-209714 + Details
Name: | us-gaap_EquitySecuritiesFvNiUnrealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117546-209714 + Details
Name: | us-gaap_EquitySecuritiesFvNiUnrealizedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=acnb_CraMutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=acnb_StockInOtherBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |