Statements of cash flows of Salisbury Bancorp, Inc. (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Net income	$ 16,473	$ 11,940	$ 11,136
Adjustments to reconcile net income to net cash provided by operating activities:
Net cash provided by operating activities	18,048	13,803	14,330
Investing Activities
Net cash utilized by investing activities	(153,206)	(114,021)	(23,375)
Financing activities
Issuance of subordinated debt, net of issuance cost	24,418
Payoff of subordinated debt	(10,000)
Common stock dividends paid	(3,452)	(3,286)	(3,155)
Net cash provided (utilized) by financing activities	217,331	166,495	(22,515)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	16,473	11,940	11,136
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of subsidiary	(13,656)	(8,987)	(8,369)
Other	63	(25)	474
Net cash provided by operating activities	2,880	2,928	3,241
Investing Activities
Investment in bank	(9,433)
Net cash utilized by investing activities	(9,433)
Financing activities
Issuance of subordinated debt, net of issuance cost	24,418
Payoff of subordinated debt	(10,000)
Common stock dividends paid	(3,452)	(3,286)	(3,155)
Proceeds from issuance of common stock	31	53	82
Net cash provided (utilized) by financing activities	10,997	(3,233)	(3,073)
Net increase (decrease) in cash and cash equivalents	4,444	(305)	168
Cash and cash equivalents, beginning of period	1,968	2,273	2,105
Cash and cash equivalents, end of period	$ 6,412	$ 1,968	$ 2,273