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Variable Interest Entities (Details) $ in Thousands | Jun. 30, 2017 USD ($)
--- | ---
Variable Interest Entities [Line Items] |
Trust Preferred Issuance, Liability Recognized | $ 3,217
Liability Recognized [Member] |
Variable Interest Entities [Line Items] |
Trust Preferred Issuance, Liability Recognized | $ 3,217

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- Definition Liability recogznized for junior subordinated debt purchased by Auburn Capital Trust with Trust Preferred Issuance + References No definition available. + Details
Name: | aubn_TrustPreferredIssuanceLiabilityRecognized
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | aubn_VariableInterestEntitiesAxis=aubn_LiabilityRecognizedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |