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Commitment and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Commitments to Extend Credit [Member]
Loss Contingencies [Line Items]
Amount of Commitment	$ 48,525	$ 45,882
Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Amount of Commitment	$ 7,093	$ 8,212

X

- Definition

Amount of unused extension of credit for loan commitments and standby letters of Credit

+ References

No definition available.

+ Details

Name:	aubn_LossContingencyAmountOfCommitment
Namespace Prefix:	aubn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration