Regulatory Matters (Summary Of Actual Capital Amounts And Ratios) (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summit [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 264,327	$ 257,122
CET1 (to risk weighted assets), Actual Ratio	0.082	0.084
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 225,645	$ 214,268
CET1 (to risk weighted assets), Minimum Required Capital, Ratio	7.00%	7.00%
Tier I Capital (to risk weighted assets), Actual Amount	$ 298,247	$ 291,042
Tier I Capital (to risk weighted assets), Actual Ratio	0.093	0.095
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 272,591	$ 260,406
Tier I Capital (to risk weighted assets), Minimum Required Capital, Ratio	0.085	0.085
Total Capital (to risk weighted assets), Actual Amount	$ 432,110	$ 420,045
Total Capital (to risk weighted assets), Actual Ratio	0.135	0.138
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 336,086	$ 319,599
Total Capital (to risk weighted assets), Minimum Required Capital, Ratio	0.105	0.105
Tier I Capital (to average assets), Actual Amount	$ 298,247	$ 291,042
Tier I Capital (to average assets), Actual Ratio	0.084	0.083
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 142,022	$ 140,261
Tier I Capital (to average assets), Minimum Required Capital, Ratio	0.040	0.040
Summit Community [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 (to risk weighted assets), Actual Amount	$ 370,527	$ 364,125
CET1 (to risk weighted assets), Actual Ratio	0.116	0.119
CET1 (to risk weighted assets), Minimum Required Capital, Amount	$ 223,594	$ 214,191
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	$ 207,623	$ 198,892
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	$ 370,527	$ 364,125
Tier I Capital (to risk weighted assets), Actual Ratio	0.116	0.119
Tier I Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 271,507	$ 260,089
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	$ 255,536	$ 244,790
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	$ 401,393	$ 390,236
Total Capital (to risk weighted assets), Actual Ratio	0.125	0.128
Total Capital (to risk weighted assets), Minimum Required Capital, Amount	$ 337,170	$ 320,115
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	$ 321,114	$ 304,872
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	$ 370,527	$ 364,125
Tier I Capital (to average assets), Actual Ratio	0.105	0.104
Tier I Capital (to average assets), Minimum Required Capital, Amount	$ 141,153	$ 140,048
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	$ 176,441	$ 175,060
Tier I Capital (to average assets), Minimum Required To Be Well Capitalized, Ratio	0.050	0.050