XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.21.2

Fair Value Recurring (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Measurements, Recurring [Member] |  |
Fair Value Disclosure, Securities Available-for-Sale [Abstract] |  |
Fair Value Disclosure, Agency Obligations | $ 111,487 | $ 97,448
Fair Value Disclosure, Agency RMBS | 198,849 | 163,470
Fair Value Disclosure, State and Political Subdivisions | 74,529 | 74,259
Fair Value Disclosure, Securities Available-for-Sale, Total | 384,865 | 335,177
Other Assets, Fair Value Disclosure | 384,865 | 335,177
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Disclosure, Securities Available-for-Sale [Abstract] |  |
Fair Value Disclosure, Agency Obligations | 0 | 0
Fair Value Disclosure, Agency RMBS | 0 | 0
Fair Value Disclosure, State and Political Subdivisions | 0 | 0
Fair Value Disclosure, Securities Available-for-Sale, Total | 0 | 0
Other Assets, Fair Value Disclosure | 0 | 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Disclosure, Securities Available-for-Sale [Abstract] |  |
Fair Value Disclosure, Agency Obligations | 111,487 | 97,448
Fair Value Disclosure, Agency RMBS | 198,849 | 163,470
Fair Value Disclosure, State and Political Subdivisions | 74,529 | 74,259
Fair Value Disclosure, Securities Available-for-Sale, Total | 384,865 | 335,177
Other Assets, Fair Value Disclosure | 384,865 | 335,177
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value Disclosure, Securities Available-for-Sale [Abstract] |  |
Fair Value Disclosure, Agency Obligations | 0 | 0
Fair Value Disclosure, Agency RMBS | 0 | 0
Fair Value Disclosure, State and Political Subdivisions | 0 | 0
Fair Value Disclosure, Securities Available-for-Sale, Total | 0 | 0
Other Assets, Fair Value Disclosure | 0 | 0
Fair Value, Measurements, Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract] |  |
Loans Held-for-sale, Fair Value Disclosure | 1,367 | 3,418
Impaired Loans, Fair Value Disclosure | 296 | 319
Other Assets Fair Value Nonrecurring | 1,360 | 1,330
Assets, Fair Value Disclosure, Nonrecurring | 3,023 | 5,067
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract] |  |
Loans Held-for-sale, Fair Value Disclosure | 0 | 0
Impaired Loans, Fair Value Disclosure | 0 | 0
Other Assets Fair Value Nonrecurring | 0 | 0
Assets, Fair Value Disclosure, Nonrecurring | 0 | 0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract] |  |
Loans Held-for-sale, Fair Value Disclosure | 1,367 | 3,418
Impaired Loans, Fair Value Disclosure | 0 | 0
Other Assets Fair Value Nonrecurring | 0 | 0
Assets, Fair Value Disclosure, Nonrecurring | 1,367 | 3,418
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Abstract] |  |
Loans Held-for-sale, Fair Value Disclosure | 0 | 0
Impaired Loans, Fair Value Disclosure | 296 | 319
Other Assets Fair Value Nonrecurring | 1,360 | 1,330
Assets, Fair Value Disclosure, Nonrecurring | $ 1,656 | $ 1,649

X
- References No definition available. + Details
Name: | aubn_AssetsFairValueDisclosureNonrecurring3
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

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

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

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

X
- Definition Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. + References No definition available. + Details
Name: | us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of other assets. + References No definition available. + Details
Name: | us-gaap_OtherAssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |