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Variable Interest Entities Textuals (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Jun. 30, 2013
Variable Interest Entities (Textuals) [Abstract] |
Trust Preferred Securities, Issued | $ 7.00
Junior Subordinated Debt, Issued | 7.20
Equity Interest, ANB Capital Trust | $ 0.20

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_EquityInterestAnbCapitalTrust
Namespace Prefix: | aubn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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