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Change in Net Deferred Tax Asset (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Change In Net Deferred Tax Asset (Liability) [Rollforward] |  |  |
Deferred Tax Assets (Liabilities), Net | $ 5,393 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 1,244 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 2,425 us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred Tax (Expense) Benefit Related To Continuing Operations | (786)aubn_DeferredTaxBenefitExpenseRelatedToContinuingOperations | (1,537)aubn_DeferredTaxBenefitExpenseRelatedToContinuingOperations | (624)aubn_DeferredTaxBenefitExpenseRelatedToContinuingOperations
Deferred Taxes, Stockholders' Equity For Change In Accumulated Other Comprehensive (Income) Loss | (4,088)aubn_DeferredTaxesStockholdersEquityForChangeInAccumulatedOtherComprehensiveIncomeLoss | 5,686 aubn_DeferredTaxesStockholdersEquityForChangeInAccumulatedOtherComprehensiveIncomeLoss | (557)aubn_DeferredTaxesStockholdersEquityForChangeInAccumulatedOtherComprehensiveIncomeLoss
Deferred Tax Assets (Liabilities), Net | $ 519 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 5,393 us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 1,244 us-gaap_DeferredTaxAssetsLiabilitiesNet

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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