Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to risk weighted assets), Actual Amount	$ 138,726	$ 136,060
Tier I Capital (to risk weighted assets), Actual Amount	113,236	109,989
Tier I Capital (to average assets), Actual Amount	113,236	109,989
Total Capital (to risk weighted assets), Actual Ratio	13.80%	13.00%
Tier I Capital (to risk weighted assets), Actual Ratio	11.30%	10.50%
Tier I Capital (to average assets), Actual Ratio	8.00%	7.60%
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	80,134	83,617
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	40,067	41,809
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Amount	56,302	58,031
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	8.00%	8.00%
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	4.00%	4.00%
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Ratio	4.00%	4.00%
Total Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	100,168	104,522
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	60,101	62,713
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	70,378	72,538
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), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
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]
Total Capital (to risk weighted assets), Actual Amount	146,450	142,329
Tier I Capital (to risk weighted assets), Actual Amount	133,760	129,058
Tier I Capital (to average assets), Actual Amount	133,760	129,058
Total Capital (to risk weighted assets), Actual Ratio	14.60%	13.60%
Tier I Capital (to risk weighted assets), Actual Ratio	13.30%	12.30%
Tier I Capital (to average assets), Actual Ratio	9.50%	8.90%
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	80,174	83,604
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	40,087	41,802
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Amount	56,320	57,995
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	8.00%	8.00%
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Ratio	4.00%	4.00%
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Ratio	4.00%	4.00%
Total Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	100,217	104,505
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	60,130	62,703
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 70,400	$ 72,493
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), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%