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Auburn National Bancorporation - Parent Only, Statement of Earnings (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Income: |  |
Other noninterest income | $ 1,644 | $ 1,880
Other Expenses [Abstract] |  |
Total interest expense | 3,856 | 4,183
Total noninterest expense | 19,554 | 19,697
Income Tax Expense (Benefit) | 1,605 | 2,370
Net earnings | 7,454 | 9,741
Parent Company [Member] |  |
Income: |  |
Dividends from bank subsidiary | 3,638 | 8,574
Other noninterest income | 862 | 346
Total income | 4,500 | 8,920
Other Expenses [Abstract] |  |
Total noninterest expense | 255 | 212
Operating Expenses | 255 | 212
Earnings Before Income Tax Expense (Benefit) And Equity In Undistributed Earnings Of Bank Subsidary | 4,245 | 8,708
Income Tax Expense (Benefit) | 110 | 26
Earnings Before Equity In Undistributed Earnings Of Bank Subsidary | 4,135 | 8,682
Equity In Undistributed Earnings Of Bank Subsidary | 3,319 | 1,059
Net earnings | $ 7,454 | $ 9,741

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