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Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | $ 25,099 | $ 29,888
Recorded Investment with No Allowance | 789 | 5,211
Recorded Investment with Allowance | 23,612 | 24,002
Total Recorded Investment | 24,401 | 29,213
Related Allowance | 8,703 | 9,105
Average Recorded Investment | 24,336 | 30,756
Commercial And Industrial [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 23,677 | 28,856
Recorded Investment with No Allowance | 242 | 5,211
Recorded Investment with Allowance | 23,435 | 23,645
Total Recorded Investment | 23,677 | 28,856
Related Allowance | 8,678 | 9,059
Average Recorded Investment | 23,807 | 30,277
Home Equity Lines Of Credit [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 184 | 184
Recorded Investment with No Allowance | 184 |
Recorded Investment with Allowance |  | 184
Total Recorded Investment | 184 | 184
Related Allowance |  | 20
Average Recorded Investment | 184 | 300
Residential Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 544 | 171
Recorded Investment with No Allowance | 352 |
Recorded Investment with Allowance | 167 | 171
Total Recorded Investment | 519 | 171
Related Allowance | 24 | 24
Average Recorded Investment | 275 | 174
Other [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 694 | 677
Recorded Investment with No Allowance | 11 |
Recorded Investment with Allowance | 10 | 2
Total Recorded Investment | 21 | 2
Related Allowance | 1 | 2
Average Recorded Investment | $ 70 | $ 5

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