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Auburn National Bancorporation - Parent Only, Statement of Earnings (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Income: |  |
Other noninterest income | $ 1,425 | $ 1,428
Other Expenses [Abstract] |  |
Total interest expense | 3,594 | 4,084
Gain on early extinguishment of debt | 0 | (790)
Total noninterest expense | 16,784 | 15,348
Income Tax Expense (Benefit) | 3,637 | 3,102
Net earnings | 7,846 | 8,150
Parent Company [Member] |  |
Income: |  |
Dividends from bank subsidiary | 3,471 | 6,709
Other noninterest income | 141 | 129
Total income | 3,612 | 6,838
Other Expenses [Abstract] |  |
Total interest expense | 125 | 228
Gain on early extinguishment of debt | 0 | 790
Total noninterest expense | 225 | 193
Operating Expenses | 350 | (369)
Earnings Before Income Tax Expense (Benefit) And Equity In Undistributed Earnings Of Bank Subsidary | 3,262 | 7,207
Income Tax Expense (Benefit) | (58) | 157
Earnings Before Equity In Undistributed Earnings Of Bank Subsidary | 3,320 | 7,050
Equity In Undistributed Earnings Of Bank Subsidary | 4,526 | 1,100
Net earnings | $ 7,846 | $ 8,150

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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