Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 222,944	$ 224,679
CET1 (to risk weighted assets), Actual Ratio	0.097	0.111
Tier I Capital (to risk weighted assets), Actual Amount	$ 241,944	$ 243,679
Tier I Capital (to risk weighted assets), Actual Ratio	0.105	0.121
Total Capital (to risk weighted assets), Actual Amount	$ 261,472	$ 256,753
Total Capital (to risk weighted assets), Actual Ratio	0.113	0.127
Tier I Capital (to average assets), Actual Amount	$ 241,944	$ 243,679
Tier I Capital (to average assets), Actual Ratio	0.090	0.105
Summit Community [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 242,345	$ 244,045
CET1 (to risk weighted assets), Actual Ratio	0.105	0.121
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 161,563	$ 141,183
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	$ 150,023	$ 131,099
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	$ 242,345	$ 244,045
Tier I Capital (to risk weighted assets), Actual Ratio	0.105	0.121
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 196,184	$ 171,437
Tier I Capital (to risk weighted assets), Minimum Required Capital, Ratio	0.085	0.085
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 184,644	$ 161,352
Tier I Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	0.080	0.080
Total Capital (to risk weighted assets), Actual Amount	$ 261,874	$ 257,119
Total Capital (to risk weighted assets), Actual Ratio	0.114	0.127
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 241,200	$ 212,579
Total Capital (to risk weighted assets), Minimum Required Capital, Ratio	0.105	0.105
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Amount	$ 229,714	$ 202,456
Total Capital (to risk weighted assets), Minimum Required To Be Well Capitalized, Ratio	0.100	0.100
Tier I Capital (to average assets), Actual Amount	$ 242,345	$ 244,045
Tier I Capital (to average assets), Actual Ratio	0.090	0.106
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 107,709	$ 92,092
Tier I Capital (to average assets), Minimum Required Capital, Ratio	0.040	0.040
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Amount	$ 134,636	$ 115,116
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Ratio	0.050	0.050