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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, 2016 | Dec. 31, 2015
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | $ 28,742 | $ 2,062
Recorded Investment with No Allowance |  | 543
Recorded Investment with Allowance | 26,934 | 520
Total Recorded Investment | 26,934 | 1,063
Related Allowance | 3,375 | 188
Average Recorded Investment | 32,242 | 1,117
Commercial And Industrial [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 16,815 |
Recorded Investment with Allowance | 16,815 |
Total Recorded Investment | 16,815 |
Related Allowance | 2,392 |
Average Recorded Investment | 22,559 |
Consumer [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 833 | 944
Recorded Investment with Allowance | 6 | 15
Total Recorded Investment | 6 | 15
Related Allowance | 6 | 15
Average Recorded Investment | 9 | 23
Residential Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 178 | 776
Recorded Investment with No Allowance |  | 524
Recorded Investment with Allowance | 178 | 182
Total Recorded Investment | 178 | 706
Related Allowance | 24 | 24
Average Recorded Investment | 181 | 752
Commercial Real Estate [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 10,503 |
Recorded Investment with Allowance | 9,522 |
Total Recorded Investment | 9,522 |
Related Allowance | 722 |
Average Recorded Investment | 9,080 |
Home Equity Lines Of Credit [Member] |  |
Financing Receivable Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 413 | 342
Recorded Investment with No Allowance |  | 19
Recorded Investment with Allowance | 413 | 323
Total Recorded Investment | 413 | 342
Related Allowance | 231 | 149
Average Recorded Investment | $ 413 | $ 342

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