Allowance For Credit Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 85,946	$ 78,861	$ 85,379	$ 83,197
Financing Receivable, Allowance for Credit Loss, Writeoff	2,685	2,402	4,920	3,749
Financing Receivable, Allowance for Credit Loss, Recovery	1,453	1,998	3,689	3,614
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	1,232	404	1,231	135
Provision for Loan, Lease, and Other Losses	2,492	2,991	2,675	(1,614)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	87,206	81,448	87,206	81,448
Ending balance	87,206	81,448	87,206	81,448
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	16,572	13,288	16,987	14,025
Financing Receivable, Allowance for Credit Loss, Writeoff	188	723	537	913
Financing Receivable, Allowance for Credit Loss, Recovery	84	316	130	434
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	104	407	407	479
Provision for Loan, Lease, and Other Losses	(190)	(134)	(524)	(799)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16,278	12,747	16,278	12,747
Ending balance	16,278	12,747	16,278	12,747
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	17,946	23,731	17,829	25,466
Financing Receivable, Allowance for Credit Loss, Writeoff	530	598	530	598
Financing Receivable, Allowance for Credit Loss, Recovery	0	540	232	588
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	530	58	298	10
Provision for Loan, Lease, and Other Losses	1,725	(1,334)	1,429	(3,117)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	19,141	22,339	19,141	22,339
Ending balance	19,141	22,339	19,141	22,339
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	5,362	4,230	5,550	5,758
Financing Receivable, Allowance for Credit Loss, Writeoff	0	33	0	33
Financing Receivable, Allowance for Credit Loss, Recovery	12	29	508	530
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(12)	4	(508)	(497)
Provision for Loan, Lease, and Other Losses	(488)	165	(1,172)	(1,864)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	4,886	4,391	4,886	4,391
Ending balance	4,886	4,391	4,886	4,391
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	17,889	11,584	16,831	11,424
Financing Receivable, Allowance for Credit Loss, Writeoff	14	46	43	81
Financing Receivable, Allowance for Credit Loss, Recovery	114	54	471	86
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(100)	(8)	(428)	(5)
Provision for Loan, Lease, and Other Losses	430	2,027	1,180	2,190
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	18,419	13,619	18,419	13,619
Ending balance	18,419	13,619	18,419	13,619
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	28,053	25,797	28,021	26,286
Financing Receivable, Allowance for Credit Loss, Writeoff	1,953	1,002	3,810	2,118
Financing Receivable, Allowance for Credit Loss, Recovery	1,243	1,058	2,348	1,975
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	710	(56)	1,462	143
Provision for Loan, Lease, and Other Losses	1,027	2,296	1,811	2,006
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	28,370	28,149	28,370	28,149
Ending balance	28,370	28,149	28,370	28,149
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	124	231	161	238
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	6
Financing Receivable, Allowance for Credit Loss, Recovery	0	1	0	1
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	0	(1)	0	5
Provision for Loan, Lease, and Other Losses	(12)	(29)	(49)	(30)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	112	203	112	203
Ending balance	$ 112	$ 203	112	$ 203
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