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Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance $ 23,685 $ 25,099
Recorded Investment with No Allowance 1,355 789
Recorded Investment with Allowance 22,110 23,612
Total Recorded Investment 23,465 24,401
Related Allowance 8,348 8,703
Average Recorded Investment 24,681 24,336
Commercial And Industrial [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 21,995 23,677
Recorded Investment with No Allowance 216 242
Recorded Investment with Allowance 21,779 23,435
Total Recorded Investment 21,995 23,677
Related Allowance 8,304 8,678
Average Recorded Investment 23,460 23,807
Residential Real Estate [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 1,191 544
Recorded Investment with No Allowance 955 352
Recorded Investment with Allowance 166 167
Total Recorded Investment 1,121 519
Related Allowance 24 24
Average Recorded Investment 838 275
Home Equity Lines Of Credit [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 184 184
Recorded Investment with No Allowance 184 184
Total Recorded Investment 184 184
Average Recorded Investment 184 184
Other [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 315 694
Recorded Investment with No Allowance   11
Recorded Investment with Allowance 165 10
Total Recorded Investment 165 21
Related Allowance 20 1
Average Recorded Investment $ 199 $ 70