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Variable Interest Entities (Details) (Liability Recognized [Member], USD $) In Thousands, unless otherwise specified | Mar. 31, 2015
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Liability Recognized [Member] |
Variable Interest Entities [Line Items] |
Trust Preferred Issuance, Liability Recognized | $ 7,217aubn_TrustPreferredIssuanceLiabilityRecognized / aubn_VariableInterestEntitiesAxis = aubn_LiabilityRecognizedMember

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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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- Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration