REGULATORY MATTERS (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

										To Be Well
										Capitalized Under
						For Capital				Prompt Corrective
		Actual				Adequacy Purposes				Action Provisions
(Dollars in thousands)		Amount		Ratio		Amount		Ratio		Amount		Ratio
As of December 31, 2017:
Total Capital to risk-weighted assets
	Company	$	531,070	11.85	%	$	358,501	8.00	%		N/A	N/A
	Sandy Spring Bank	$	508,514	11.38	%	$	357,352	8.00	%	$	446,690	10.00	%
Tier 1 Capital to risk-weighted assets
	Company	$	485,814	10.84	%	$	268,875	6.00	%		N/A	N/A
	Sandy Spring Bank	$	463,257	10.37	%	$	268,014	6.00	%	$	357,352	8.00	%
Common Equity Tier 1 Capital to risk-
	weighted assets
	Company	$	485,814	10.84	%	$	201,657	4.50	%		N/A	N/A
	Sandy Spring	$	463,257	10.37	%	$	201,011	4.50	%	$	290,349	6.50	%
Tier 1 Leverage
	Company	$	485,814	9.24	%	$	210,407	4.00	%		N/A	N/A
	Sandy Spring Bank	$	463,257	8.82	%	$	210,006	4.00	%	$	262,508	5.00	%
As of December 31, 2016:
Total Capital to risk-weighted assets
	Company	$	529,990	12.80	%	$	331,177	8.00	%		N/A	N/A
	Sandy Spring Bank	$	508,593	12.33	%	$	330,023	8.00	%	$	412,529	10.00	%
Tier 1 Capital to risk-weighted assets
	Company	$	485,923	11.74	%	$	248,383	6.00	%		N/A	N/A
	Sandy Spring Bank	$	434,526	10.53	%	$	247,517	6.00	%	$	330,023	8.00	%
Common Equity Tier 1 Capital to risk-
	weighted assets
	Company	$	455,923	11.01	%	$	186,287	4.50	%		N/A	N/A
	Sandy Spring	$	434,526	10.53	%	$	185,638	4.50	%	$	268,144	6.50	%
Tier 1 Leverage
	Company	$	485,923	10.14	%	$	191,776	4.00	%		N/A	N/A
	Sandy Spring Bank	$	434,526	9.09	%	$	191,304	4.00	%	$	239,130	5.00	%