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Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Unpaid Principal Balance | $ 5,774 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance | $ 7,826 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance |
Impaired Financing Receivable, Charge-off And Payments Applied | (2,503)aubn_ImpairedFinancingReceivableChargeOffAndPaymentsApplied | (2,261)aubn_ImpairedFinancingReceivableChargeOffAndPaymentsApplied |
Impaired Financing Receivable, Recorded Investment | 3,271 us-gaap_ImpairedFinancingReceivableRecordedInvestment | 5,565 us-gaap_ImpairedFinancingReceivableRecordedInvestment |
Impaired Financing Receivable, Related Allowance | 194 us-gaap_ImpairedFinancingReceivableRelatedAllowance | 260 us-gaap_ImpairedFinancingReceivableRelatedAllowance |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Interest Income, Accrual Method | 119 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | 72 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod | 77 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 70 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 124 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 0 aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 70 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 124 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 98 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 188 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 194 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 7 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 9 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember | 13 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialAndIndustrialLoansMember
Construction And Land Development Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 2,822 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 2,879 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (2,217)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | (1,682)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 605 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 1,197 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 452 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | (67)aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 385 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 88 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 1,032 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 1,603 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 3,888 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConstructionAndLandDevelopmentLoansMember
Commercial Real Estate Owner Occupied Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 331 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 1,217 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (68)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | (190)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 263 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 1,027 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 846 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 875 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 846 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 875 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 102 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 110 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 1,308 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 1,972 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 2,449 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 40 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 51 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember | 64 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOwnerOccupiedLoansMember
Commercial Real Estate Other Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 518 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | (89)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 429 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 591 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 602 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 591 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 602 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 92 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 62 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 872 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 1,454 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 2,621 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 29 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 12 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateOtherLoansMember
Commercial Real Estate Loans, Total [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 331 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 1,735 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (68)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | (279)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 263 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 1,456 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 1,437 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 1,477 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,437 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 1,477 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 194 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 172 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 2,180 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 3,426 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 5,070 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Impaired Financing Receivable, Interest Income, Accrual Method | 69 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 63 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember | 64 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_CommercialRealEstateLoansTotalMember
Residential Real Estate Consumer Mortgage Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 934 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 952 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (192)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | (198)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 742 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 754 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 731 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 786 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 861 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 43 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateConsumerMortgageLoansMember
Residential Real Estate Investment Property Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 180 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 207 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (26)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | (35)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 154 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 172 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 164 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 274 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 652 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateInvestmentPropertyLoansMember
Residential Real Estate Loans, Total [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 1,114 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,159 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (218)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | (233)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 896 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 926 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 895 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,060 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 1,513 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Impaired Financing Receivable, Interest Income, Accrual Method | 43 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ResidentialRealEstateLoansTotalMember
Consumer Installment and Revolving Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Impaired Financing Receivable, Average Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Impaired Financing Receivable, Interest Income, Accrual Method | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_ConsumerInstallmentAndRevolvingLoansMember
Total For Impaired Loans [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance | 4,337 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | 5,897 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied | (2,503)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | (2,194)aubn_ImpairedFinancingReceivableWithNoRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,834 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | 3,703 us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance | 1,437 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | 1,929 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied | 0 aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | (67)aubn_ImpairedFinancingReceivableWithRelatedAllowanceChargeOffAndPaymentsApplied / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,437 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | 1,862 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |
Impaired Financing Receivable, With Related Allowance, Related Allowance | $ 194 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember | $ 260 aubn_ImpairedFinancingReceivableWithRelatedAllowanceRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = aubn_TotalForImpairedLoansMember |

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