Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 140,888	$ 137,849
CET1 (to risk weighted assets), Actual Ratio	11.90%	11.80%
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 82,875	$ 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	$ 76,956	$ 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	$ 159,888	$ 156,849
Tier I Capital (to risk weighted assets), Actual Ratio	13.50%	13.40%
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 100,670	$ 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	$ 94,748	$ 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	$ 171,202	$ 168,321
Total Capital (to risk weighted assets), Actual Ratio	14.50%	14.40%
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 123,974	$ 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	$ 118,070	$ 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	$ 159,888	$ 156,849
Tier I Capital (to average assets), Actual Ratio	10.70%	10.70%
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 59,771	$ 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	$ 74,714	$ 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	$ 160,433	$ 158,081
CET1 (to risk weighted assets), Actual Ratio	13.60%	13.60%
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 82,576	$ 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	$ 76,678	$ 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	$ 160,433	$ 158,081
Tier I Capital (to risk weighted assets), Actual Ratio	13.60%	13.60%
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 100,271	$ 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	$ 94,372	$ 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	$ 171,747	$ 169,553
Total Capital (to risk weighted assets), Actual Ratio	14.50%	14.50%
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 124,369	$ 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	$ 118,446	$ 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	$ 160,433	$ 158,081
Tier I Capital (to average assets), Actual Ratio	10.70%	10.80%
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 59,975	$ 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	$ 74,969	$ 73,186
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Ratio	5.00%	5.00%