CAPITAL REQUIREMENTS AND RESTRICTIONS ON RETAINED EARNINGS (Summary Of Capital Adequacy Requirements) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Consolidated Entities [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets), Actual Amount	$ 541,475	$ 498,189
Total Capital (to Risk Weighted Assets), Actual Ratio	13.26%	13.23%
Tier I Capital (to Risk Weighted Assets), Actual Amount	$ 494,265	$ 454,382
Tier I Capital (to Risk Weighted Assets), Actual Ratio	12.10%	12.07%
Common Equity Tier 1 (CET1), Actual Amount	$ 464,265	$ 424,382
Common Equity Tier 1 (CET1), Actual Ratio	11.37%	11.27%
Tier I Capital (to Average Assets), Actual Amount	$ 494,265	$ 454,382
Tier I Capital (to Average Assets), Actual Ratio	10.76%	10.86%
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 326,782	$ 301,243
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 245,087	$ 225,932
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	6.00%	6.00%
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount	$ 183,815	$ 169,449
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 183,793	$ 167,310
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio	4.00%	4.00%
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 377,842	$ 324,777
Excess Capital to Risk Weighted Assets, For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	9.25%	8.625%
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 296,147	$ 249,467
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	7.25%	6.625%
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 234,875	$ 192,984
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	5.75%	5.125%
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 183,793	$ 167,310
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	4.00%	4.00%
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 408,478	$ 376,554
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 326,782	$ 301,243
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	8.00%	8.00%
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 265,511	$ 244,760
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	6.50%	6.50%
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 229,741	$ 209,138
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	5.00%	5.00%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk Weighted Assets), Actual Amount	$ 525,482	$ 482,600
Total Capital (to Risk Weighted Assets), Actual Ratio	12.89%	12.84%
Tier I Capital (to Risk Weighted Assets), Actual Amount	$ 478,272	$ 438,793
Tier I Capital (to Risk Weighted Assets), Actual Ratio	11.73%	11.67%
Common Equity Tier 1 (CET1), Actual Amount	$ 478,272	$ 438,793
Common Equity Tier 1 (CET1), Actual Ratio	11.73%	11.67%
Tier I Capital (to Average Assets), Actual Amount	$ 478,272	$ 438,793
Tier I Capital (to Average Assets), Actual Ratio	10.44%	10.54%
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 326,140	$ 300,784
Total Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 244,605	$ 225,588
Tier I Capital (to Risk Weighted Assets), Minimum Required For Capital Adequacy Purposes Ratio	6.00%	6.00%
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Amount	$ 183,454	$ 169,191
Common Equity Tier 1 (CET1), Minimum Required For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Amount	$ 183,187	$ 166,522
Tier I Capital (to Average Assets), Minimum Required For Capital Adequacy Purposes Ratio	4.00%	4.00%
Excess Capital, For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 377,099	$ 324,283
Excess Capital to Risk Weighted Assets, For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	9.25%	8.625%
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 295,564	$ 249,087
Tier I Capital (to Risk Weighted Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	7.25%	6.625%
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 234,413	$ 192,690
Common Equity Tier 1 (CET1), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	5.75%	5.125%
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Amount	$ 183,187	$ 166,522
Tier I Capital (to Average Assets), For Capital Adequacy Purposes Plus Capital Conservation Buffer Ratio	4.00%	4.00%
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 407,675	$ 375,980
Total Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	10.00%	10.00%
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 326,140	$ 300,784
Tier I Capital (to Risk Weighted Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	8.00%	8.00%
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 264,988	$ 244,387
Common Equity Tier 1 (CET1), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	6.50%	6.50%
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Amount	$ 228,984	$ 208,153
Tier I Capital (to Average Assets), Minimum Required to Be Well Capitalized Under Prompt Corrective Action Regulations Ratio	5.00%	5.00%