SHAREHOLDERS' EQUITY - Actual regulatory capital position and minimum capital requirements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Salisbury
Total Capital (to risk-weighted assets)
Actual - Amount	$ 100,870	$ 98,920
Actual - Ratio	12.70%	12.94%
For Capital Adequacy - Amount	$ 63,523	$ 61,154
For Capital Adequacy - Ratio	8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 83,708	$ 82,034
Actual - Ratio	10.54%	10.73%
For Capital Adequacy - Amount	$ 47,643	$ 45,865
For Capital Adequacy - Ratio	6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 83,708	$ 82,034
Actual - Ratio	10.54%	10.73%
For Capital Adequacy - Amount	$ 35,732	$ 34,399
For Capital Adequacy - Ratio	4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Tier 1 Capital (to average assets)
Actual - Amount	$ 83,708	$ 83,034
Actual - Ratio	8.56%	8.53%
For Capital Adequacy - Amount	$ 39,125	$ 38,461
For Capital Adequacy - Ratio	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Bank
Total Capital (to risk-weighted assets)
Actual - Amount		$ 95,810	$ 97,862
Actual - Ratio		12.54%	12.32%
For Capital Adequacy - Amount		$ 61,130	$ 63,523
For Capital Adequacy - Ratio		8.00%	8.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount		$ 76,413	$ 79,404
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio		10.00%	10.00%
Tier 1 Capital (to risk-weighted assets)
Actual - Amount		$ 88,924	$ 90,700
Actual - Ratio		11.64%	11.42%
For Capital Adequacy - Amount		$ 45,848	$ 47,643
For Capital Adequacy - Ratio		6.00%	6.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount		$ 61,130	$ 63,523
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio		8.00%	8.00%
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual - Amount		$ 88,924	$ 90,700
Actual - Ratio		11.64%	11.42%
For Capital Adequacy - Amount		$ 34,386	$ 35,732
For Capital Adequacy - Ratio		4.50%	4.50%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount		$ 49,668	$ 51,613
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio		6.50%	6.50%
Tier 1 Capital (to average assets)
Actual - Amount		$ 88,924	$ 90,700
Actual - Ratio		9.25%	9.27%
For Capital Adequacy - Amount		$ 38,461	$ 39,125
For Capital Adequacy - Ratio		4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount		$ 48,076	$ 48,906
To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio		5.00%	5.00%