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Auburn National Bancorporation - Parent Only, Statement of Earnings (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income:    
Other noninterest income $ 1,757 $ 1,644
Other Expenses [Abstract]    
Total interest expense 2,517 3,856
Total noninterest expense 19,433 19,554
Income Tax Expense (Benefit) 1,406 1,605
Net earnings 8,039 7,454
Parent Company [Member]    
Income:    
Dividends from bank subsidiary 3,682 3,638
Other noninterest income 665 862
Total income 4,347 4,500
Other Expenses [Abstract]    
Total noninterest expense 189 255
Operating Expenses 189 255
Earnings Before Income Tax Expense (Benefit) And Equity In Undistributed Earnings Of Bank Subsidary 4,158 4,245
Income Tax Expense (Benefit) 82 110
Earnings Before Equity In Undistributed Earnings Of Bank Subsidary 4,076 4,135
Equity In Undistributed Earnings Of Bank Subsidary 3,963 3,319
Net earnings $ 8,039 $ 7,454