Auburn National Bancorporation - Parent Only, Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets:
Cash And Due From Banks	$ 15,142	$ 27,127
Premises and equipment, net	45,931	45,535
Other assets	20,368	19,900
Total assets	977,324	975,255
Liabilities:
Accrued expenses and other liabilities	3,208	1,019
Total liabilities	899,032	898,748
Stockholders' equity:
Total stockholders' equity	78,292	76,507	$ 68,041
Total liabilities and stockholders' equity	977,324	975,255
Parent Company [Member]
Assets:
Cash And Due From Banks	1,001	1,277
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	76,852	74,857
Other assets	532	523
Total assets	78,385	76,657
Liabilities:
Accrued expenses and other liabilities	93	150
Total liabilities	93	150
Stockholders' equity:
Total stockholders' equity	78,292	76,507
Total liabilities and stockholders' equity	$ 78,385	$ 76,657