Allowance For Credit Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 83,745	$ 85,379
Financing Receivable, Allowance for Credit Loss, Writeoff	3,240	2,235
Financing Receivable, Allowance for Credit Loss, Recovery	2,399	2,236
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	841	(1)
Provision for Loan, Lease, and Other Losses	2,180	183
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	85,084	85,946
Ending balance	85,084	85,946
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	15,496	16,987
Financing Receivable, Allowance for Credit Loss, Writeoff	220	349
Financing Receivable, Allowance for Credit Loss, Recovery	171	46
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	49	303
Provision for Loan, Lease, and Other Losses	(476)	(334)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	14,971	16,572
Ending balance	14,971	16,572
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	16,374	17,829
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	22	232
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(22)	(232)
Provision for Loan, Lease, and Other Losses	785	(296)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	17,181	17,946
Ending balance	17,181	17,946
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	5,227	5,550
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	914	496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(914)	(496)
Provision for Loan, Lease, and Other Losses	(399)	(684)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5,742	5,362
Ending balance	5,742	5,362
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	18,818	16,831
Financing Receivable, Allowance for Credit Loss, Writeoff	1	29
Financing Receivable, Allowance for Credit Loss, Recovery	82	357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(81)	(328)
Provision for Loan, Lease, and Other Losses	734	750
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	19,633	17,889
Ending balance	19,633	17,889
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	27,713	28,021
Financing Receivable, Allowance for Credit Loss, Writeoff	3,019	1,857
Financing Receivable, Allowance for Credit Loss, Recovery	1,210	1,105
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	1,809	752
Provision for Loan, Lease, and Other Losses	1,490	784
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	27,394	28,053
Ending balance	27,394	28,053
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	117	161
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	0	0
Provision for Loan, Lease, and Other Losses	46	(37)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	163	124
Ending balance	$ 163	124
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

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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- Definition

Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
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-Publisher SEC

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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