MERGERS AND ACQUISITIONS - Consideration paid (Details) - Consideration Paid $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Salisbury Bancorp common stock issued to Riverside Bank common stockholders	$ 27,230
Cash consideration paid for fractional shares	1
Riverside stock options, vested upon acquisition	20
Total consideration paid	$ 27,251