XML 46 R62.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | $ 2,249 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing | $ 1,601 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 1,022 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual | 3,222 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 3,271 aubn_ImpairedFinancingReceivableTroubleDebtStructuring | 4,823 aubn_ImpairedFinancingReceivableTroubleDebtStructuring |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 194 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses | 260 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts | 2 aubn_FinancingReceivableModificationNumberOfContracts | 8 aubn_FinancingReceivableModificationNumberOfContracts | 14 aubn_FinancingReceivableModificationNumberOfContracts
Financing Receivable, Modification, Pre-Modification Recorded Investment | 1,302 aubn_FinancingReceivableModificationPreModificationRecordedInvestment | 3,330 aubn_FinancingReceivableModificationPreModificationRecordedInvestment | 11,819 aubn_FinancingReceivableModificationPreModificationRecordedInvestment
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 1,304 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment | 3,326 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment | 9,608 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 | 2 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 272 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 | 1,622 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 | 2,386 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Commercial and Industrial Loans [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 70 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember | 124 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 70 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember | 124 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts |  |  | 0 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember
Financing Receivable, Modification, Pre-Modification Recorded Investment |  |  | 0 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  |  | 0 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialAndIndustrialLoansMember
Construction And Land Development Loans [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 605 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 1,582 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 605 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 1,582 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 88 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 4 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 390 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 5,419 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 387 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 4,305 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts |  | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  | 1,197 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 2,386 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Commercial Real Estate Owner Occupied Loans [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 846 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 875 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 263 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 285 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,109 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 1,160 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 102 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 110 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 4 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 882 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 3,167 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 882 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 2,225 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 272 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |  |
Commercial Real Estate Other Loans [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 591 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 602 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 429 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 591 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 1,031 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 92 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 62 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 2 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 2 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Modification, Pre-Modification Recorded Investment | 590 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 1,037 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 1,803 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 592 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 1,041 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember | 1,657 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts |  | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment |  | 425 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateOtherLoansMember |
Commercial Real Estate Loans, Total [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 1,437 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 1,477 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 263 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 714 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 1,700 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 2,191 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 194 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 172 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 3 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 6 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Modification, Pre-Modification Recorded Investment | 590 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 1,919 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 4,970 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 592 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 1,923 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 3,882 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember
Financing Receivable, Modifications, Subsequent Default [Line Items] |  |  |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 1 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 272 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember | 425 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_CommercialRealEstateLoansTotalMember |
Residential Real Estate Consumer Mortgage Loans [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 742 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 754 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 742 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 754 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 3 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Financing Receivable, Modification, Pre-Modification Recorded Investment | 712 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 849 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 712 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 844 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
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 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 154 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 172 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 154 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 172 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts |  | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 2 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Financing Receivable, Modification, Pre-Modification Recorded Investment |  | 172 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 567 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment |  | 172 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 563 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Residential Real Estate Loans, Total [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 742 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 154 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 926 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 896 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 926 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modification, Number of Contracts | 1 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 4 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 4 aubn_FinancingReceivableModificationNumberOfContracts / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember
Financing Receivable, Modification, Pre-Modification Recorded Investment | 712 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,021 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,430 aubn_FinancingReceivableModificationPreModificationRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember
Financing Receivable, Modifications, Post-Modifications Recorded Investment | 712 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,016 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,421 aubn_FinancingReceivableModificationsPostModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ResidentialRealEstateLoansTotalMember
Consumer Installment and Revolving Loans [Member] |  |  |
Impaired Financing Receivable And Troubled Debt Restructing [Line Items] |  |  |
Impaired Financing Receivable, Troubled Debt Restructuring, Still Accruing | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Nonaccrual | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringNonaccrual / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, Trouble Debt Structuring, Total | 0 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 aubn_ImpairedFinancingReceivableTroubleDebtStructuring / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | $ 0 aubn_ImpairedFinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |

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