Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Common Equity	$ 137,849
Tier One Common Equity to Risk Weighted Assets	11.80%
Tier One Common Equity Required for Capital Adequacy	$ 81,775
Tier One Common Equity Required for Capital Adequacy to Risk Weighted Assets	7.00%
Tier One Common Equity Required to be Well Capitalized	$ 75,934
Tier One Common Equity Required to be Well Capitalized to Risk Weighted Assets	6.50%
Total Capital (to risk weighted assets), Actual Amount	$ 168,321	$ 158,196
Total Capital (to risk weighted assets), Actual Ratio	14.40%	14.90%
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	$ 122,734	$ 84,937
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	10.50%	8.00%
Total Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 116,890	$ 106,172
Total Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier I Capital (to risk weighted assets ), Actual Amount	$ 156,849	$ 141,589
Tier I Capital (to risk weighted assets), Actual Ratio	13.40%	13.30%
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	$ 99,494	$ 42,583
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	8.50%	4.00%
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 93,641	$ 63,875
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	8.00%	6.00%
Tier I Capital (to average assets), Actual Amount	$ 156,849	$ 141,589
Tier I Capital (to average assets), Actual Ratio	10.70%	9.90%
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Amount	$ 58,635	$ 57,208
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Ratio	4.00%	4.00%
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 73,294	$ 71,510
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
Summit Community [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Common Equity	$ 158,081
Tier One Common Equity to Risk Weighted Assets	13.60%
Tier One Common Equity Required for Capital Adequacy	$ 81,365
Tier One Common Equity Required for Capital Adequacy to Risk Weighted Assets	7.00%
Tier One Common Equity Required to be Well Capitalized	$ 75,553
Tier One Common Equity Required to be Well Capitalized to Risk Weighted Assets	6.50%
Total Capital (to risk weighted assets), Actual Amount	$ 169,553	$ 161,820
Total Capital (to risk weighted assets), Actual Ratio	14.50%	15.30%
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	$ 122,780	$ 84,612
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	10.50%	8.00%
Total Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 116,933	$ 105,765
Total Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier I Capital (to risk weighted assets ), Actual Amount	$ 158,081	$ 150,653
Tier I Capital (to risk weighted assets), Actual Ratio	13.60%	14.20%
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	$ 98,801	$ 42,437
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	8.50%	4.00%
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 92,989	$ 63,656
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	8.00%	6.00%
Tier I Capital (to average assets), Actual Amount	$ 158,081	$ 150,653
Tier I Capital (to average assets), Actual Ratio	10.80%	10.60%
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Amount	$ 58,549	$ 56,850
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Ratio	4.00%	4.00%
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 73,186	$ 71,063
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%