SHAREHOLDERS' EQUITY - Actual regulatory capital position and minimum capital requirements (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Salisbury
Total Capital (to risk-weighted assets)
Actual - Amount	$ 109,676	$ 107,659
Actual - Ratio	12.68%	12.51%
Minimum Capital Required For Capital Adequacy - Amount	$ 69,213	$ 68,848
Minimum Capital Required For Capital Adequacy - Ratio	8.00%	8.00%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 90,842	$ 90,362
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	10.50%	10.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 90,833	$ 89,738
Actual - Ratio	10.50%	10.43%
Minimum Capital Required For Capital Adequacy - Amount	$ 51,910	$ 51,636
Minimum Capital Required For Capital Adequacy - Ratio	6.00%	6.00%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 73,539	$ 73,150
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	8.50%	8.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 90,833	$ 89,738
Actual - Ratio	10.50%	10.43%
Minimum Capital Required For Capital Adequacy - Amount	$ 38,932	$ 38,727
Minimum Capital Required For Capital Adequacy - Ratio	4.50%	4.50%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 60,561	$ 60,242
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	7.00%	7.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Tier 1 Capital (to average assets)
Actual - Amount	$ 90,833	$ 89,738
Actual - Ratio	8.32%	8.25%
Minimum Capital Required For Capital Adequacy - Amount	$ 43,688	$ 43,527
Minimum Capital Required For Capital Adequacy - Ratio	4.00%	4.00%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 43,688	$ 43,527
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	4.00%	4.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio
Bank
Total Capital (to risk-weighted assets)
Actual - Amount	$ 106,847	$ 104,013
Actual - Ratio	12.35%	12.09%
Minimum Capital Required For Capital Adequacy - Amount	$ 69,213	$ 68,848
Minimum Capital Required For Capital Adequacy - Ratio	8.00%	8.00%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 90,842	$ 90,362
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	10.50%	10.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 86,516	$ 86,059
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	10.00%	10.00%
Tier 1 Capital (to risk-weighted assets)
Actual - Amount	$ 98,004	$ 96,092
Actual - Ratio	11.33%	11.17%
Minimum Capital Required For Capital Adequacy - Amount	$ 51,910	$ 51,636
Minimum Capital Required For Capital Adequacy - Ratio	6.00%	6.00%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 73,539	$ 73,150
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	8.50%	8.50%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 69,213	$ 68,848
Minimum 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	$ 98,004	$ 96,092
Actual - Ratio	11.33%	11.17%
Minimum Capital Required For Capital Adequacy - Amount	$ 38,932	$ 38,727
Minimum Capital Required For Capital Adequacy - Ratio	4.50%	4.50%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 60,561	$ 60,242
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	7.00%	7.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 56,235	$ 55,939
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	6.50%	6.50%
Tier 1 Capital (to average assets)
Actual - Amount	$ 98,004	$ 96,092
Actual - Ratio	8.97%	8.83%
Minimum Capital Required For Capital Adequacy - Amount	$ 43,688	$ 43,527
Minimum Capital Required For Capital Adequacy - Ratio	4.00%	4.00%
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Amount	$ 43,688	$ 43,527
Minimum Capital Required For Capital Adequacy Plus Required Capital Conservation Buffer - Ratio	4.00%	4.00%
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Amount	$ 54,610	$ 54,409
Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions - Ratio	5.00%	5.00%