XML 70 R55.htm IDEA: XBRL DOCUMENT
v3.20.4

Impaired Loans Averages (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment | $ 175 | $ 32
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | 9
Commercial and Industrial Loans [Member] |  |
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment |  | 8
Impaired Financing Receivable, Interest Income, Accrual Method |  | 0
Commercial Real Estate Owner Occupied Loans [Member] |  |
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment |  | 24
Impaired Financing Receivable, Interest Income, Accrual Method |  | 9
Commercial Real Estate Other Loans [Member] |  |
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment | 116 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 |
Commercial Real Estate Loans, Total [Member] |  |
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment | 116 | 24
Impaired Financing Receivable, Interest Income, Accrual Method | 0 | $ 9
Residential Real Estate Investment Property Loans [Member] |  |
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment | 59 |
Impaired Financing Receivable, Interest Income, Accrual Method | 0 |
Residential Real Estate Loans, Total [Member] |  |
Impaired Financing Receivable, Average Recorded Investment [Line Items] |  |
Impaired Financing Receivable, Average Recorded Investment | 59 |
Impaired Financing Receivable, Interest Income, Accrual Method | $ 0 |

X
- References No definition available. + Details
Name: | aubn_ImpairedFinancingReceivableAverageRecordedInvestmentLineItems
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

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

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

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