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Loans (Aging Of Past Due Loans) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | $ 9,702 |  | $ 13,465 |
Loan balance |  | 6,821,606 |  | 6,871,122 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 18,047 | [1] | 21,070 | [2]
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments |  | 36,400 |  | 53,300 |
Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 6,793,857 |  | 6,836,587 |
Construction Real Estate Commercial [Domain] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 201,184 |  | 214,561 |
Loan balance |  | 201,184 |  | 214,561 |
Construction Real Estate Commercial [Domain] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 201,184 |  | 214,561 |
Residential Real Estate Commercial [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 85 |  | 283 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 542,945 |  | 533,802 |
Loan balance |  | 542,945 |  | 533,802 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 397 | [1] | 438 | [2]
Residential Real Estate Commercial [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 542,463 |  | 533,081 |
Residential Real Estate - Mortgage [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 4,551 |  | 6,170 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,020,857 |  | 1,033,658 |
Loan balance |  | 1,020,857 |  | 1,033,658 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 5,319 | [1] | 5,933 | [2]
Residential Real Estate - Mortgage [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,010,987 |  | 1,021,555 |
Residential Real Estate - HELOC [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 833 |  | 565 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 159,582 |  | 165,605 |
Loan balance |  | 159,582 |  | 165,605 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 849 | [1] | 1,011 | [2]
Residential Real Estate - HELOC [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 157,900 |  | 164,029 |
Residential Real Estate - Installment [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 71 |  | 49 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 5,157 |  | 5,642 |
Loan balance |  | 5,157 |  | 5,642 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 16 | [1] | 31 | [2]
Residential Real Estate - Installment [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 5,070 |  | 5,562 |
PPP loans receivable [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  |  |  | 242 |
Loan balance |  | 37,424 |  | 74,420 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 66 |  | 793 |
PPP loans receivable [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 37,358 |  | 73,385 |
Bank Overdrafts |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Loan balance |  | 2,055 |  | 1,127 |
Bank Overdrafts | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 2,055 |  | 1,127 |
Construction Real Estate Retail |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 314 |  | 346 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 103,174 |  | 107,225 |
Loan balance |  | 103,174 |  | 107,225 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 654 |  | 660 | [2]
Construction Real Estate Retail | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 102,206 |  | 106,219 |
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 158 |  | 65 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,780,605 |  | 1,801,792 |
Loan balance |  | 1,780,605 |  | 1,801,792 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 801 | [1] | 1,461 | [2]
Commercial Real Estate [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,779,646 |  | 1,800,266 |
Finance Leases Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  |  |  | 60 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 19,377 |  | 20,532 |
Loan balance |  | 19,377 |  | 20,532 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans | [2] |  |  | 526 |
Finance Leases Portfolio Segment [Member] | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 19,377 |  | 19,946 |
PPP loans receivable [Member] |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 37,424 |  | 74,420 |
GFSC loans |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 101 |  | 153 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,156 |  | 1,793 |
Loan balance |  | 1,156 |  | 1,793 |
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans |  | 28 |  | 52 |
GFSC loans | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,027 |  | 1,588 |
Check loans |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Accruing loans past due 30-89 days |  | 9 |  | 10 |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 2,033 |  | 2,093 |
Loan balance |  | 2,033 |  | 2,093 |
Check loans | Financial Asset, Not Past Due |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 2,024 |  | 2,083 |
Bank Overdrafts |  |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | $ 2,055 |  | $ 1,127 |
[1] | 1) Includes an aggregate of $0.4 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $36.4 million of nonaccrual loans which were current in regards to contractual principal and interest payments
[2] | 1) Includes an aggregate of $1.6 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $53.3 million of nonaccrual loans which were current in regards to contractual principal and interest payments.

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