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Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance $ 23,912 $ 2,062
Recorded Investment with No Allowance 527 543
Recorded Investment with Allowance 22,475 520
Total Recorded Investment 23,002 1,063
Related Allowance 2,383 188
Average Recorded Investment 19,804 1,117
Commercial And Industrial [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 12,148  
Recorded Investment with Allowance 12,148  
Total Recorded Investment 12,148  
Related Allowance 1,215  
Average Recorded Investment 12,219  
Consumer [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 858 944
Recorded Investment with No Allowance 4  
Recorded Investment with Allowance 14 15
Total Recorded Investment 18 15
Related Allowance 14 15
Average Recorded Investment 18 23
Residential Real Estate [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 774 776
Recorded Investment with No Allowance 523 524
Recorded Investment with Allowance 181 182
Total Recorded Investment 704 706
Related Allowance 24 24
Average Recorded Investment 705 752
Commercial Real Estate [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 9,809  
Recorded Investment with Allowance 9,809  
Total Recorded Investment 9,809  
Related Allowance 981  
Average Recorded Investment 6,539  
Home Equity Lines Of Credit [Member]    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 323 342
Recorded Investment with No Allowance   19
Recorded Investment with Allowance 323 323
Total Recorded Investment 323 342
Related Allowance 149 149
Average Recorded Investment $ 323 $ 342