SALISBURY BANCORP (PARENT ONLY) CONDENSED FINANCIAL INFORMATION - Unconsolidated statements of income of Salisbury Bancorp, Inc. (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 6,256	$ 6,685	$ 8,457
Salisbury Bancorp, Inc. (Parent Only)
Dividends from subsidiary	3,691	3,491	2,743
Interest income	8	6	19
Interest expense	624	624	35
Expenses	530	337	511
Income before taxes and equity in undistributed net income of subsidiary	2,545	2,536	2,216
Income tax benefit	421	369	192
Income before equity in undistributed net income of subsidiary	2,966	2,905	2,408
Equity in undistributed net income of subsidiary	3,290	3,780	6,049
Net income	$ 6,256	$ 6,685	$ 8,457