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Loans (Allowance For Loan Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance $ 30,838 $ 33,784 $ 30,057
Chargeoffs 1,633 1,497 1,146
Recoveries 51 306 19
Provision for Loan Losses (Credit) 33 (1,755) 4,854
Allowance, ending balance 29,289 30,838 33,784
Commercial And Industrial [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 1,158 1,441 1,408
Chargeoffs 841 683 102
Recoveries 39 34 13
Provision for Loan Losses (Credit) 1,137 366 122
Allowance, ending balance 1,493 1,158 1,441
Commercial Mortgages [Member] | Multifamily Loan [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 5,851 6,423 6,119
Provision for Loan Losses (Credit) 1,300 (572) 304
Allowance, ending balance 7,151 5,851 6,423
Commercial Mortgages [Member] | Other Loan [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 3,783 4,734 4,296
Provision for Loan Losses (Credit) (285) (951) 438
Allowance, ending balance 3,498 3,783 4,734
Commercial Mortgages [Member] | Owner-occupied Loan [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 743 1,076 959
Chargeoffs     820
Provision for Loan Losses (Credit) 178 (333) 937
Allowance, ending balance 921 743 1,076
Residential Mortgages [Member] | Closed-end [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 18,844 19,347 15,740
Chargeoffs 433 552 97
Recoveries 1 118 3
Provision for Loan Losses (Credit) (2,714) (69) 3,701
Allowance, ending balance 15,698 18,844 19,347
Residential Mortgages [Member] | Revolving Home Equity [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 410 689 1,401
Chargeoffs 358 253 100
Recoveries   150  
Provision for Loan Losses (Credit) 463 (176) (612)
Allowance, ending balance 515 410 689
Consumer And Other [Member]      
Financing Receivable, Allowance for Credit Loss [Line Items]      
Allowance, beginning balance 49 74 134
Chargeoffs 1 9 27
Recoveries 11 4 3
Provision for Loan Losses (Credit) (46) (20) (36)
Allowance, ending balance $ 13 $ 49 $ 74