XML 20 R37.htm IDEA: XBRL DOCUMENT v2.4.1.9
Loan Credit Quality Analysis (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass $ 377,177aubn_FinancingReceivableRecordedInvestmentPass $ 383,356aubn_FinancingReceivableRecordedInvestmentPass  
Financing Receivable, Recorded Investment, Special Mention 10,820aubn_FinancingReceivableRecordedInvestmentSpecialMention 11,289aubn_FinancingReceivableRecordedInvestmentSpecialMention  
Financing Receivable Recorded Investment, Substandard Accruing 7,827aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing 7,847aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing  
Financing Receivable, Recorded Investment, Nonaccrual Status 1,251us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus 1,117us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus  
Loans and Leases Receivable, Gross, Carrying Amount 397,075us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 403,609us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 377,827us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Commercial and Industrial Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 47,816aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
49,550aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 4,284aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
4,348aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 385aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
376aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 51us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
55us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount 52,536us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
54,329us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
54,632us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialAndIndustrialLoansMember
Construction And Land Development Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 36,505aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
35,911aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 34aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
226aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 768aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
556aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 618us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
605us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount 37,925us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
37,298us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
31,275us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConstructionAndLandDevelopmentLoansMember
Commercial Real Estate Owner Occupied Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 41,017aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
49,900aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 1,709aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
1,905aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 225aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
228aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 405us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
263us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount 43,356us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
52,296us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOwnerOccupiedLoansMember
 
Commercial Real Estate Other Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 136,637aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
136,801aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 2,223aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
2,253aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 655aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
656aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount 139,515us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
139,710us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateOtherLoansMember
 
Commercial Real Estate Loans, Total [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 177,654aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
186,701aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
 
Financing Receivable, Recorded Investment, Special Mention 3,932aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
4,158aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
 
Financing Receivable Recorded Investment, Substandard Accruing 880aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
884aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 405us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
263us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
 
Loans and Leases Receivable, Gross, Carrying Amount 182,871us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
192,006us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
178,721us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_CommercialRealEstateLoansTotalMember
Residential Real Estate Consumer Mortgage Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 59,567aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
59,646aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 1,964aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
1,912aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 4,439aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
4,891aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 27us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
40us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount 65,997us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
66,489us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateConsumerMortgageLoansMember
 
Residential Real Estate Investment Property Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 43,342aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
39,348aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 533aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
624aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 1,243aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
1,026aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 150us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
154us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount 45,268us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
41,152us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateInvestmentPropertyLoansMember
 
Residential Real Estate Loans, Total [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 102,909aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
98,994aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
 
Financing Receivable, Recorded Investment, Special Mention 2,497aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
2,536aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
 
Financing Receivable Recorded Investment, Substandard Accruing 5,682aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
5,917aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 177us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
194us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
 
Loans and Leases Receivable, Gross, Carrying Amount 111,265us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
107,641us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
101,433us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ResidentialRealEstateLoansTotalMember
Consumer Installment and Revolving Loans [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Financing Receivable, Recorded Investment, Pass 12,293aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
12,200aubn_FinancingReceivableRecordedInvestmentPass
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
 
Financing Receivable, Recorded Investment, Special Mention 73aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
21aubn_FinancingReceivableRecordedInvestmentSpecialMention
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
 
Financing Receivable Recorded Investment, Substandard Accruing 112aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
114aubn_FinancingReceivableRecordedInvestmentSubstandardAccruing
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
 
Financing Receivable, Recorded Investment, Nonaccrual Status 0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
0us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
 
Loans and Leases Receivable, Gross, Carrying Amount $ 12,478us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
$ 12,335us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember
$ 11,766us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= aubn_ConsumerInstallmentAndRevolvingLoansMember