XML 71 R56.htm IDEA: XBRL DOCUMENT
v3.20.4

Troubled Debt Restructuring (Details) $ in Thousands | Dec. 31, 2020 USD ($)
--- | ---
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 319
Impaired Financing Receivable, Trouble Debt Structuring, Total | 319
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0
Commercial Real Estate Other Loans [Member] |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 212
Impaired Financing Receivable, Trouble Debt Structuring, Total | 212
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0
Commercial Real Estate Loans, Total [Member] |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 212
Impaired Financing Receivable, Trouble Debt Structuring, Total | 212
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0
Residential Real Estate Investment Property Loans [Member] |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 107
Impaired Financing Receivable, Trouble Debt Structuring, Total | 107
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0
Residential Real Estate Loans, Total [Member] |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 107
Impaired Financing Receivable, Trouble Debt Structuring, Total | 107
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 0

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

X
- References No definition available. + Details
Name: | aubn_ImpairedFinancingReceivableTroubleDebtStructuring
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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