XML 68 R53.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Loans Categories and Past Due Loans(Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans Past Due 30-59 Days | $ 8,124 | $ 8,194
Loans Past Due 60-89 Days | 1,743 | 1,069
Loans Past Due 90 or more Days | 2,841 | 2,636
Total Loans Past Due | 12,708 | 11,899
Current Loans | 1,938,062 | 1,741,369
Total Loans | 1,950,770 | 1,753,268
Loans 90 or More Days Past Due and Still Accruing Interest | 319 | 1,201
Nonaccrual Loans | 5,526 | 4,193
Commercial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans Past Due 30-59 Days | 139 | 112
Loans Past Due 60-89 Days | 19 | 29
Loans Past Due 90 or more Days | 99 | 148
Total Loans Past Due | 257 | 289
Current Loans | 128,992 | 104,866
Total Loans | 129,249 | 105,155
Loans 90 or More Days Past Due and Still Accruing Interest | 0 | 0
Nonaccrual Loans | 588 | 155
Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans Past Due 30-59 Days | 0 | 121
Loans Past Due 60-89 Days | 0 | 0
Loans Past Due 90 or more Days | 807 | 0
Total Loans Past Due | 807 | 121
Current Loans | 443,441 | 431,525
Total Loans | 444,248 | 431,646
Loans 90 or More Days Past Due and Still Accruing Interest | 0 | 0
Nonaccrual Loans | 1,530 | 875
Other Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans Past Due 30-59 Days | 5,891 | 5,593
Loans Past Due 60-89 Days | 1,215 | 898
Loans Past Due 90 or more Days | 513 | 513
Total Loans Past Due | 7,619 | 7,004
Current Loans | 595,208 | 530,357
Total Loans | 602,827 | 537,361
Loans 90 or More Days Past Due and Still Accruing Interest | 6 | 158
Nonaccrual Loans | 653 | 589
Residential Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans Past Due 30-59 Days | 2,094 | 2,368
Loans Past Due 60-89 Days | 509 | 142
Loans Past Due 90 or more Days | 1,422 | 1,975
Total Loans Past Due | 4,025 | 4,485
Current Loans | 770,421 | 674,621
Total Loans | 774,446 | 679,106
Loans 90 or More Days Past Due and Still Accruing Interest | 313 | 1,043
Nonaccrual Loans | $ 2,755 | $ 2,574

X
- Definition Loans Past Due 30 - 59 Days + References No definition available. + Details
Name: | arow_LoansPastDue3059Days
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Past Due 60 - 89 Days + References No definition available. + Details
Name: | arow_LoansPastDue6089Days
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Past Due 90 or more Days + References No definition available. + Details
Name: | arow_LoansPastDue90ormoreDays
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
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_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |