Loans (Aging Of Past Due Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2023		Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		$ 12,776		$ 17,595
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		7,093,857		7,141,891
Loan balance		7,093,857		7,141,891
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		41,552	[1]	22,085	[2]
Impaired Financing Receivable, Recorded Investment, Nonaccrual loans which are current in regards to contractual P&I payments		32,800		58,900
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		7,039,529		7,102,211
Construction Real Estate Commercial [Domain]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days				751
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		173,668		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		173,668		208,231
Residential Real Estate Commercial [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		18		519
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		562,759		550,183
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		328	[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		562,413		549,187
Residential Real Estate - Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		4,439		7,630
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,089,772		1,075,446
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		5,362	[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		1,079,971		1,062,659
Residential Real Estate - HELOC [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		418		832
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		164,656		167,151
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		745	[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		163,493		165,732
Residential Real Estate - Installment [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		11		57
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,987		4,091
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans	[2]			4
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		3,976		4,030
PPP loans receivable [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days				155
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,445		4,206
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		294		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		3,151		3,662
Bank Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,831		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		1,831		1,489
Construction Real Estate Retail
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		50		1,035
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		117,075		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		117,025		114,875
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		390		737
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		1,800,878		1,794,054
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		2,478	[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		1,798,010		1,788,579
Finance Leases Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		98
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		18,472		19,637
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		15
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		18,359		19,637
PPP loans receivable [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		3,445		4,206
GFSC loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		26		48
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		140		274
Financing Receivable Recorded Investment Ninety Days Or More Past Due And Accruing Plus Past Due Nonaccrual Loans		2
GFSC loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		112		226
Check loans
Financing Receivable, Past Due [Line Items]
Accruing loans past due 30-89 days		1		2
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		2,071		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		2,070		2,148
Bank Overdrafts
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss		$ 1,831		$ 1,489

[1] 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 $32.8 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.