Allowance For Credit Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 85,379	$ 83,197
Financing Receivable, Allowance for Credit Loss, Writeoff	2,235	1,347
Financing Receivable, Allowance for Credit Loss, Recovery	2,236	1,616
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(1)	(269)
Provision for Loan, Lease, and Other Losses	183	(4,605)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	85,946	78,861
Ending balance	85,946	78,861
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	383
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Commercial Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,987	14,025
Financing Receivable, Allowance for Credit Loss, Writeoff	349	190
Financing Receivable, Allowance for Credit Loss, Recovery	46	118
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	303	72
Provision for Loan, Lease, and Other Losses	(334)	(665)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16,572	13,288
Ending balance	16,572	13,288
Commercial Financial And Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	222
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	17,829	25,466
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	232	48
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(232)	(48)
Provision for Loan, Lease, and Other Losses	(296)	(1,783)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	17,946	23,731
Ending balance	17,946	23,731
Commercial Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	181
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,550	5,758
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	496	501
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(496)	(501)
Provision for Loan, Lease, and Other Losses	(684)	(2,029)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5,362	4,230
Ending balance	5,362	4,230
Construction Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,831	11,424
Financing Receivable, Allowance for Credit Loss, Writeoff	29	35
Financing Receivable, Allowance for Credit Loss, Recovery	357	32
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(328)	3
Provision for Loan, Lease, and Other Losses	750	163
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	17,889	11,584
Ending balance	17,889	11,584
Residential Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	(20)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	28,021	26,286
Financing Receivable, Allowance for Credit Loss, Writeoff	1,857	1,116
Financing Receivable, Allowance for Credit Loss, Recovery	1,105	917
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	752	199
Provision for Loan, Lease, and Other Losses	784	(290)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	28,053	25,797
Ending balance	28,053	25,797
Consumer [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Finance Leases Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	161	238
Financing Receivable, Allowance for Credit Loss, Writeoff	0	6
Financing Receivable, Allowance for Credit Loss, Recovery	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	0	6
Provision for Loan, Lease, and Other Losses	(37)	(1)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	124	231
Ending balance	124	$ 231
Finance Leases Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest