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Variable Interest Entities Textuals (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Variable Interest Entities (Textuals) [Abstract]
Trust Preferred Securities, Issued	$ 7.00

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- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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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