Auburn National Bancorporation - Parent Only, Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net earnings	$ 1,395	$ 10,346
Adjustments to reconcile net earnings to net cash provided by operating activties:
Depreciation and amortization	1,700	1,528
Net gain on disposition of premises and equipment		(3,234)
Net increase in other assets	2,652	(2,441)
Net increase in accrued expenses and other liabilities	(2,011)	(770)
Net cash provided by operating activities	11,902	10,980
Cash flows from investing activities:
Purchases of premises and equipment	(418)	(7,049)
Proceeds from sale of premises and equipment		4,222
Net cash used in investing activities	91,377	(90,958)
Cash flows from financing activities:
Stock repurchases	(229)	(504)
Dividends paid	(3,776)	(3,720)
Net cash provided by (used in) financing activities	(59,164)	(49,027)
Net change in cash and cash equivalents	44,115	(129,005)
Cash and cash equivalents at beginning of period	27,254	156,259
Cash and cash equivalents at end of period	71,369	27,254
Parent Company [Member]
Cash flows from operating activities:
Net earnings	1,395	10,346
Adjustments to reconcile net earnings to net cash provided by operating activties:
Net increase in other assets	(1)	108
Net increase in accrued expenses and other liabilities	8	(408)
Equity In Distributed (Undistributed) Earnings Of Bank Subsidary	(2,180)	6,827
Net cash provided by operating activities	3,582	3,219
Cash flows from financing activities:
Stock repurchases	(229)	(504)
Dividends paid	(3,776)	(3,720)
Net cash provided by (used in) financing activities	(4,005)	(4,224)
Net change in cash and cash equivalents	(423)	(1,005)
Cash and cash equivalents at beginning of period	1,700	2,705
Cash and cash equivalents at end of period	$ 1,277	$ 1,700