Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to risk weighted assets), Actual Amount	$ 140,323	$ 138,593
Tier I Capital (to risk weighted assets), Actual Amount	116,954	115,221
Tier I Capital (to average assets), Actual Amount	116,954	115,221
Total Capital (to risk weighted assets), Actual Ratio	14.10%	14.00%
Tier I Capital (to risk weighted assets), Actual Ratio	11.80%	11.60%
Tier I Capital (to average assets), Actual Ratio	8.40%	8.30%
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	79,576	79,391
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	39,788	39,695
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Amount	55,381	55,591
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	99,470	99,238
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	59,682	59,543
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	69,226	69,489
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	151,015	148,803
Tier I Capital (to risk weighted assets), Actual Amount	138,446	136,231
Tier I Capital (to average assets), Actual Amount	138,446	136,231
Total Capital (to risk weighted assets), Actual Ratio	15.20%	15.00%
Tier I Capital (to risk weighted assets), Actual Ratio	13.90%	13.70%
Tier I Capital (to average assets), Actual Ratio	10.00%	9.80%
Total Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	79,640	79,484
Tier I Capital (to risk weighted assets), Minimum Required Regulatory Capital, Amount	39,820	39,742
Tier I Capital (to average assets), Minimum Required Regulatory Capital, Amount	55,378	55,581
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	99,550	99,354
Tier I Capital (to risk weighted assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	59,730	59,613
Tier I Capital (to average assets), To be Well Capitalized under Prompt Corrective Action Provisions, Amount	$ 69,223	$ 69,476
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%