Auburn National Bancorporation - Parent Only, Statement of Earnings (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income:
Other noninterest income	$ 1,454	$ 1,377	$ 1,535
Other Expenses [Abstract]
Total interest expense	5,364	6,536	8,170
Total noninterest expense	15,104	18,412	19,383
Income Tax Expense (Benefit)	2,784	2,290	1,419
Net earnings	7,448	7,118	6,763
Parent Company [Member]
Income:
Dividends from bank subsidiary	3,377	3,304	3,231
Other noninterest income	147	1,284	288
Total income	3,524	4,588	3,519
Other Expenses [Abstract]
Total interest expense	236	236	236
Total noninterest expense	206	302	318
Operating Expenses, Total	442	538	554
Earnings Before Income Tax Expense (Benefit) And Equity In Undistributed Earnings Of Bank Subsidary	3,082	4,050	2,965
Income Tax Expense (Benefit)	(114)	275	(45)
Earnings Before Equity In Undistributed Earnings Of Bank Subsidary	3,196	3,775	3,010
Equity In Undistributed Earnings Of Bank Subsidary	4,252	3,343	3,753
Net earnings	$ 7,448	$ 7,118	$ 6,763