Auburn National Bancorporation - Parent Only, Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets:
Cash and due from banks	$ 12,856	$ 13,437
Premises and equipment, net	10,807	10,442
Other assets	8,688	13,706
Total assets	789,231	751,343
Liabilities:
Accrued expenses and other liabilities	3,144	2,434
Long-term debt	12,217	12,217
Total liabilities	713,432	686,858
Stockholders' equity:
Total stockholders' equity	75,799	64,485	70,149	65,416
Total liabilities and stockholders' equity	789,231	751,343
Parent Company [Member]
Assets:
Cash and due from banks	2,311	2,408
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	81,410	70,164
Other assets	846	846
Total assets	84,567	73,418
Liabilities:
Accrued expenses and other liabilities	1,551	1,716
Long-term debt	7,217	7,217
Total liabilities	8,768	8,933
Stockholders' equity:
Total stockholders' equity	75,799	64,485
Total liabilities and stockholders' equity	$ 84,567	$ 73,418