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Regulatory Capital (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Auburn National Bancorporation [Member] |  |
Tier One Risk Based Capital [Abstract] |  |
Tier One Risk Based Capital | $ 84,268 | $ 80,356
Tier One Risk Based Capital to Risk Weighted Assets | 16.57% | 17.45%
Tier One Risk Based Capital Required for Capital Adequacy | $ 30,515 | $ 18,419
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 6.00% | 4.00%
Common Equity Tier One Capital [Abstract] |  |
Common Equity Tier One Capital | $ 77,714 |
Common Equity Tier One Captial To Risk Weighted Assets | 15.28% |
Common Equity Tier One Captial Required For Capital Adequacy | $ 22,886 |
Common Equity Tier One Captial Required for Capital Adequacy To Risk Weighted Assets | 4.50% |
Total Risk-Based Capital [Abstract] |  |
Total Risk Based Capital | $ 88,682 | $ 85,356
Total Risk Based Capital to Risk Weighted Assets | 17.44% | 18.54%
Total Risk Based Capital Required for Capital Adequacy | $ 40,687 | $ 36,839
Total Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 8.00% | 8.00%
Tier One Leverage Capital [Abstract] |  |
Tier One Leverage Capital | $ 84,268 | $ 80,356
Tier One Leverage Capital to Average Assets | 10.35% | 10.32%
Tier One Leverage Capital Required for Capital Adequacy | $ 32,553 | $ 31,133
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | 4.00% | 4.00%
AuburnBank [Member] |  |
Tier One Risk Based Capital [Abstract] |  |
Tier One Risk Based Capital | $ 82,848 | $ 78,968
Tier One Risk Based Capital to Risk Weighted Assets | 16.26% | 17.11%
Tier One Risk Based Capital Required for Capital Adequacy | $ 30,577 | $ 18,463
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 6.00% | 4.00%
Tier One Risk Based Capital Required to be Well Capitalized | $ 40,769 | $ 27,695
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 8.00% | 6.00%
Common Equity Tier One Capital [Abstract] |  |
Common Equity Tier One Capital | $ 82,848 |
Common Equity Tier One Captial To Risk Weighted Assets | 16.26% |
Common Equity Tier One Captial Required For Capital Adequacy | $ 22,933 |
Common Equity Tier One Captial Required for Capital Adequacy To Risk Weighted Assets | 4.50% |
Common Equity Tier One Captial Required For Well Capitalized | $ 33,125 |
Common Equity Tier One Captial Required For Well Capitalized To Risk Weighted Assets | 6.50% |
Total Risk-Based Capital [Abstract] |  |
Total Risk Based Capital | $ 87,262 | $ 83,968
Total Risk Based Capital to Risk Weighted Assets | 17.12% | 18.19%
Total Risk Based Capital Required for Capital Adequacy | $ 40,769 | $ 36,927
Total Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | 8.00% | 8.00%
Total Risk Based Capital Required to be Well Capitalized | $ 50,962 | $ 46,158
Total Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets | 10.00% | 10.00%
Tier One Leverage Capital [Abstract] |  |
Tier One Leverage Capital | $ 82,848 | $ 78,968
Tier One Leverage Capital to Average Assets | 10.19% | 10.16%
Tier One Leverage Capital Required for Capital Adequacy | $ 32,519 | $ 31,099
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | 4.00% | 4.00%
Tier One Leverage Capital Required to be Well Capitalized | $ 40,649 | $ 38,873
Tier One Leverage Capital Required to be Well Capitalized to Average Assets | 5.00% | 5.00%

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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 + Details
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- Definition The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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