Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 127,848
CET1 (to risk weighted assets), Actual Ratio	11.40%
CET1 (to risk weighted assets), Minimum Required Capital, Amount	78,503
CET1 (to risk weighted assets), Minimum Required Capital, Ratio	7.00%
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	72,896
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	6.50%
Tier I Capital (to risk weighted assets), Actual Amount	146,848	141,589
Tier I Capital (to risk weighted assets), Actual Ratio	13.10%	13.30%
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	95,283	42,583
Tier I Capital (to risk weighted assets), Minimum Required Capital, Ratio	8.50%	4.00%
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	89,678	63,875
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	8.00%	6.00%
Total Capital (to risk weighted assets), Actual Amount	157,675	158,196
Total Capital (to risk weighted assets), Actual Ratio	14.10%	14.90%
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	117,418	84,937
Total Capital (to risk weighted assets), Minimum Required Capital, Ratio	10.50%	8.00%
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	111,826	106,172
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	10.00%	10.00%
Tier I Capital (to average assets), Actual Amount	146,848	141,589
Tier I Capital (to average assets), Actual Ratio	10.10%	9.90%
Tier I Capital (to average assets), Minimum Required Capital, Amount	58,158	57,208
Tier I Capital (to average assets), Minimum Required Capital, Ratio	4.00%	4.00%
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Amount	72,697	71,510
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Ratio	5.00%	5.00%
Summit Community [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	151,685
CET1 (to risk weighted assets), Actual Ratio	13.50%
CET1 (to risk weighted assets), Minimum Required Capital, Amount	78,651
CET1 (to risk weighted assets), Minimum Required Capital, Ratio	7.00%
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	73,034
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	6.50%
Tier I Capital (to risk weighted assets), Actual Amount	151,685	150,653
Tier I Capital (to risk weighted assets), Actual Ratio	13.50%	14.20%
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	95,505	42,437
Tier I Capital (to risk weighted assets), Minimum Required Capital, Ratio	8.50%	4.00%
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	89,887	63,656
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	8.00%	6.00%
Total Capital (to risk weighted assets), Actual Amount	162,512	161,820
Total Capital (to risk weighted assets), Actual Ratio	14.50%	15.30%
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	117,681	84,612
Total Capital (to risk weighted assets), Minimum Required Capital, Ratio	10.50%	8.00%
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	112,077	105,765
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	10.00%	10.00%
Tier I Capital (to average assets), Actual Amount	151,685	150,653
Tier I Capital (to average assets), Actual Ratio	10.50%	10.60%
Tier I Capital (to average assets), Minimum Required Capital, Amount	57,785	56,850
Tier I Capital (to average assets), Minimum Required Capital, Ratio	4.00%	4.00%
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Amount	$ 72,231	$ 71,063
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Ratio	5.00%	5.00%