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Variable Interest Entities (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014
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Variable Interest Entities [Line Items] |
Trust Preferred Issuance, Liability Recognized | $ 7,217 aubn_TrustPreferredIssuance

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_TrustPreferredIssuance
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