Long-Term Debt Textuals (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Long-term debt:
Securities Pledged For Long-term FHLB Advances	$ 0	$ 1.0
Qualifying Residential Mortgages Pledged For Long-Term Advances	$ 35.4	$ 42.1

Amount of pledged securities used to secure Federal Home Loan Bank (FHLB) long-term advances

No definition available.

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