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Long-Term Debt Textuals (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Long-term debt:
Qualifying Residential Mortgages Pledged For Long-Term Advances	$ 31.9	$ 35.4

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- References

No definition available.

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

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