Loans (Aging Of Past Due Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2023		Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		$ 17,741		$ 17,595
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		7,208,109		7,141,891
Loan balance		7,208,109		7,141,891
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		21,611	[1]	22,085	[2]
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments		36,600		58,900
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		7,168,757		7,102,211
Construction Real Estate Commercial [Domain]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		549		751
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		160,344		208,982
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		159,795		208,231
Residential Real Estate Commercial [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days				519
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		580,445		550,183
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		369	[1]	477	[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		580,076		549,187
Residential Real Estate - Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		5,872		7,630
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,133,676		1,075,446
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		5,645	[1]	5,157	[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		1,122,159		1,062,659
Residential Real Estate - HELOC [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		1,008		832
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		167,940		167,151
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		682	[1]	587	[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		166,250		165,732
Residential Real Estate - Installment [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		19		57
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		4,262		4,091
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		1	[1]	4	[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		4,242		4,030
PPP loans receivable [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		132		155
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,078		4,206
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans				389
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		2,946		3,662
Bank Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,596		1,489
Bank Overdrafts | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,596		1,489
Construction Real Estate Retail
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		724		1,035
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		114,362		116,433
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	[2]			523
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		113,638		114,875
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		1,330		737
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,799,440		1,794,054
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		1,805	[1]	4,738	[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		1,796,305		1,788,579
Finance Leases Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		24
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		18,380		19,637
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		18,356		19,637
PPP loans receivable [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,078		4,206
GFSC loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		13		48
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		65		274
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		5
GFSC loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		47		226
Check loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		4		2
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,044		2,150
Check loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,040		2,148
Bank Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		$ 1,596		$ 1,489

[1] 1) Includes an aggregate of $1.0 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $36.6 million of nonaccrual loans which were current in regards to contractual principal and interest payments

[2] 1) Includes an aggregate of $1.3 million of loans past due 90 days or more and accruing. The remaining loans were past due nonaccrual loans.(2) Includes an aggregate of $58.9 million of nonaccrual loans which were current in regards to contractual principal and interest payments.