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Deposits Textuals (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Time Deposits [Abstract]
Time Deposits, $250,000 or More	$ 97.6	$ 57.4

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- References

No definition available.

+ Details

Name:	aubn_TimeDeposits250000OrMore
Namespace Prefix:	aubn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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No definition available.

+ Details

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