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Variable Interest Entities (Tables) | 6 Months Ended
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Jun. 30, 2012
Variable interest entity [Abstract] |
Variable Interest Entity [Table Text Block] |
|  | Maximum |  |  | Liability |  |
(Dollars in thousands) |  | Loss Exposure |  |  | Recognized |  | Classification
Type: |  |  |  |  |  |  |
Trust preferred issuances |  | N/A |  |  | $ 7,217 |  | Long-term debt

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- Details
Name: | aubn_VariableInterestEntityAbstract
Namespace Prefix: | aubn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | aubn_VariableInterestEntityTableTextBlock
Namespace Prefix: | aubn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration