XML 12 R40.htm IDEA: XBRL DOCUMENT
v3.19.3

Commitments and Contingencies - Commitments to Extend Credit and Letters of Credit (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | --- | ---
Commitments to Extend Credit |  |  |
Loan Commitments and Letters of Credit [Line Items] |  |  |
Notional Amount | $ 340,976 | $ 321,143 | $ 335,587
Fair Value | 0 | 0 | 0
Standby Letters of Credit |  |  |
Loan Commitments and Letters of Credit [Line Items] |  |  |
Notional Amount | 3,164 | 4,466 | 4,016
Fair Value | $ 26 | $ 12 | $ 4
Minimum | Standby Letters of Credit |  |  |
Loan Commitments and Letters of Credit [Line Items] |  |  |
Loan commitments, fixed fee percent | 1.00% |  |
Maximum | Standby Letters of Credit |  |  |
Loan Commitments and Letters of Credit [Line Items] |  |  |
Loan commitments, fixed fee percent | 3.00% |  |

X
- Definition Loans And Leases Receivable, Loan Commitments, Fixed Fees, Percent + References No definition available. + Details
Name: | arow_LoansAndLeasesReceivableLoanCommitmentsFixedFeesPercent
Namespace Prefix: | arow_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The fair value of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
Name: | us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The face amount of financial assets, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References No definition available. + Details
Name: | us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_FairValueOffBalanceSheetRisksDisclosureInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |