Allowance For Credit Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 85,084	$ 85,946	$ 83,745	$ 85,379
Financing Receivable, Allowance for Credit Loss, Writeoff	3,097	2,685	6,337	4,920
Financing Receivable, Allowance for Credit Loss, Recovery	1,475	1,453	3,874	3,689
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	1,622	1,232	2,463	1,231
Provision for Loan, Lease, and Other Losses	3,113	2,492	5,293	2,675
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	86,575	87,206	86,575	87,206
Ending balance	86,575	87,206	86,575	87,206
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	14,971	16,572	15,496	16,987
Financing Receivable, Allowance for Credit Loss, Writeoff	286	188	506	537
Financing Receivable, Allowance for Credit Loss, Recovery	90	84	261	130
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	196	104	245	407
Provision for Loan, Lease, and Other Losses	1,888	(190)	1,412	(524)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16,663	16,278	16,663	16,278
Ending balance	16,663	16,278	16,663	16,278
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	17,181	17,946	16,374	17,829
Financing Receivable, Allowance for Credit Loss, Writeoff	0	530	0	530
Financing Receivable, Allowance for Credit Loss, Recovery	5	0	27	232
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(5)	530	(27)	298
Provision for Loan, Lease, and Other Losses	(331)	1,725	454	1,429
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16,855	19,141	16,855	19,141
Ending balance	16,855	19,141	16,855	19,141
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	5,742	5,362	5,227	5,550
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	119	12	1,033	508
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(119)	(12)	(1,033)	(508)
Provision for Loan, Lease, and Other Losses	6	(488)	(393)	(1,172)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5,867	4,886	5,867	4,886
Ending balance	5,867	4,886	5,867	4,886
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	19,633	17,889	18,818	16,831
Financing Receivable, Allowance for Credit Loss, Writeoff	30	14	31	43
Financing Receivable, Allowance for Credit Loss, Recovery	185	114	267	471
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(155)	(100)	(236)	(428)
Provision for Loan, Lease, and Other Losses	(338)	430	396	1,180
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	19,450	18,419	19,450	18,419
Ending balance	19,450	18,419	19,450	18,419
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	27,394	28,053	27,713	28,021
Financing Receivable, Allowance for Credit Loss, Writeoff	2,781	1,953	5,800	3,810
Financing Receivable, Allowance for Credit Loss, Recovery	1,076	1,243	2,286	2,348
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	1,705	710	3,514	1,462
Provision for Loan, Lease, and Other Losses	1,890	1,027	3,380	1,811
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	27,579	28,370	27,579	28,370
Ending balance	27,579	28,370	27,579	28,370
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	163	124	117	161
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	0	0	0	0
Provision for Loan, Lease, and Other Losses	(2)	(12)	44	(49)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	161	112	161	112
Ending balance	$ 161	$ 112	$ 161	112
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