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Regulatory Capital (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Auburn National Bancorporation [Member]    
Tier One Leverage Capital [Abstract]    
Tier One Leverage Capital $ 80,356us-gaap_TierOneLeverageCapital
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 $ 76,037us-gaap_TierOneLeverageCapital
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Leverage Capital to Average Assets 10.32%us-gaap_TierOneLeverageCapitalToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 10.10%us-gaap_TierOneLeverageCapitalToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Leverage Capital Required for Capital Adequacy 31,133us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 30,119us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Risk Based Capital [Abstract]    
Tier One Risk Based Capital 80,356us-gaap_TierOneRiskBasedCapital
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 76,037us-gaap_TierOneRiskBasedCapital
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Risk Based Capital to Risk Weighted Assets 17.45%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 17.19%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Risk Based Capital Required for Capital Adequacy 18,419us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 17,696us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Total Risk-Based Capital    
Total Risk Based Capital 85,356us-gaap_Capital
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 81,385us-gaap_Capital
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Total Risk Based Capital to Risk Weighted Assets 18.54%us-gaap_CapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 18.40%us-gaap_CapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Total Risk Based Capital Required for Capital Adequacy 36,839us-gaap_CapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 35,392us-gaap_CapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
Total Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember		 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnNationalBancorporationMember
AuburnBank [Member]    
Tier One Leverage Capital [Abstract]    
Tier One Leverage Capital 78,968us-gaap_TierOneLeverageCapital
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 74,716us-gaap_TierOneLeverageCapital
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Leverage Capital to Average Assets 10.16%us-gaap_TierOneLeverageCapitalToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 9.94%us-gaap_TierOneLeverageCapitalToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Leverage Capital Required for Capital Adequacy 31,099us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 30,069us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Leverage Capital Required to be Well Capitalized 38,873us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 37,587us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Risk Based Capital [Abstract]    
Tier One Risk Based Capital 78,968us-gaap_TierOneRiskBasedCapital
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 74,716us-gaap_TierOneRiskBasedCapital
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Risk Based Capital to Risk Weighted Assets 17.11%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 16.84%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Risk Based Capital Required for Capital Adequacy 18,463us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 17,742us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Risk Based Capital Required to be Well Capitalized 27,695us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 26,614us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Total Risk-Based Capital    
Total Risk Based Capital 83,968us-gaap_Capital
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 80,064us-gaap_Capital
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Total Risk Based Capital to Risk Weighted Assets 18.19%us-gaap_CapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 18.05%us-gaap_CapitalToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Total Risk Based Capital Required for Capital Adequacy 36,927us-gaap_CapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 35,485us-gaap_CapitalRequiredForCapitalAdequacy
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Total Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Total Risk Based Capital Required to be Well Capitalized $ 46,158us-gaap_CapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 $ 44,356us-gaap_CapitalRequiredToBeWellCapitalized
/ dei_LegalEntityAxis
= aubn_AuburnbankMember
Total Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember		 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
/ dei_LegalEntityAxis
= aubn_AuburnbankMember