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Variable Interest Entities (Details) (Liability Recognized [Member], USD $) In Thousands, unless otherwise specified | Jun. 30, 2012
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Liability Recognized [Member] |
Variable Interest Entities [Line Items] |
Trust Preferred Securities Liability | $ 7,217

X
- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_TrustPreferredSecuritiesLiability
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | aubn_VariableInterestEntitiesLineItems
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration