Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 147,791	$ 137,849
CET1 (to risk weighted assets), Actual Ratio	11.10%	11.80%
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 93,202	$ 81,775
CET1 (to risk weighted assets), Minimum Required Capital, Ratio	7.00%	7.00%
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 86,544	$ 75,934
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	6.50%	6.50%
Tier I Capital (to risk weighted assets), Actual Amount	$ 164,707	$ 156,849
Tier I Capital (to risk weighted assets), Actual Ratio	12.40%	13.40%
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 112,904	$ 99,494
Tier I Capital (to risk weighted assets), Minimum Required Capital, Ratio	8.50%	8.50%
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 106,263	$ 93,641
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	8.00%	8.00%
Total Capital (to risk weighted assets), Actual Amount	$ 176,326	$ 168,321
Total Capital (to risk weighted assets), Actual Ratio	13.30%	14.40%
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 139,205	$ 122,734
Total Capital (to risk weighted assets), Minimum Required Capital, Ratio	10.50%	10.50%
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 132,576	$ 116,890
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	$ 164,707	$ 156,849
Tier I Capital (to average assets), Actual Ratio	10.40%	10.70%
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 63,349	$ 58,635
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	$ 79,186	$ 73,294
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	$ 166,332	$ 158,081
CET1 (to risk weighted assets), Actual Ratio	12.50%	13.60%
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 93,146	$ 81,365
CET1 (to risk weighted assets), Minimum Required Capital, Ratio	7.00%	7.00%
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 86,493	$ 75,553
CET1 (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	6.50%	6.50%
Tier I Capital (to risk weighted assets), Actual Amount	$ 166,332	$ 158,081
Tier I Capital (to risk weighted assets), Actual Ratio	12.50%	13.60%
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 113,106	$ 98,801
Tier I Capital (to risk weighted assets), Minimum Required Capital, Ratio	8.50%	8.50%
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 106,452	$ 92,989
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	8.00%	8.00%
Total Capital (to risk weighted assets), Actual Amount	$ 177,951	$ 169,553
Total Capital (to risk weighted assets), Actual Ratio	13.40%	14.50%
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 139,439	$ 122,780
Total Capital (to risk weighted assets), Minimum Required Capital, Ratio	10.50%	10.50%
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 132,799	$ 116,933
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	$ 166,332	$ 158,081
Tier I Capital (to average assets), Actual Ratio	10.50%	10.80%
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 63,365	$ 58,549
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	$ 79,206	$ 73,186
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Ratio	5.00%	5.00%