Allowance For Credit Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 87,206	$ 81,448	$ 85,379	$ 83,197
Financing Receivable, Allowance for Credit Loss, Writeoff	2,293	1,748	7,213	5,497
Financing Receivable, Allowance for Credit Loss, Recovery	1,269	1,071	4,958	4,685
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	1,024	677	2,255	812
Provision for Loan, Lease, and Other Losses	(1,580)	3,190	1,095	1,576
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	84,602	83,961	84,602	83,961
Ending balance	84,602	83,961	84,602	83,961
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	16,278	12,747	16,987	14,025
Financing Receivable, Allowance for Credit Loss, Writeoff	218	543	755	1,456
Financing Receivable, Allowance for Credit Loss, Recovery	79	110	209	544
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	139	433	546	912
Provision for Loan, Lease, and Other Losses	(1,171)	563	(1,695)	(236)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	14,968	12,877	14,968	12,877
Ending balance	14,968	12,877	14,968	12,877
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	19,141	22,339	17,829	25,466
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	530	598
Financing Receivable, Allowance for Credit Loss, Recovery	3	36	235	624
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(3)	(36)	295	(26)
Provision for Loan, Lease, and Other Losses	(526)	(1,653)	903	(4,770)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	18,618	20,722	18,618	20,722
Ending balance	18,618	20,722	18,618	20,722
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	4,886	4,391	5,550	5,758
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	33
Financing Receivable, Allowance for Credit Loss, Recovery	40	20	548	550
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(40)	(20)	(548)	(517)
Provision for Loan, Lease, and Other Losses	373	87	(799)	(1,777)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5,299	4,498	5,299	4,498
Ending balance	5,299	4,498	5,299	4,498
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	18,419	13,619	16,831	11,424
Financing Receivable, Allowance for Credit Loss, Writeoff	1	0	44	81
Financing Receivable, Allowance for Credit Loss, Recovery	8	20	479	106
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(7)	(20)	(435)	(25)
Provision for Loan, Lease, and Other Losses	(1,437)	1,464	(257)	3,654
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16,989	15,103	16,989	15,103
Ending balance	16,989	15,103	16,989	15,103
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	28,370	28,149	28,021	26,286
Financing Receivable, Allowance for Credit Loss, Writeoff	2,074	1,169	5,884	3,287
Financing Receivable, Allowance for Credit Loss, Recovery	1,139	884	3,487	2,859
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	935	285	2,397	428
Provision for Loan, Lease, and Other Losses	1,185	2,699	2,996	4,705
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	28,620	30,563	28,620	30,563
Ending balance	28,620	30,563	28,620	30,563
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	112	203	161	238
Financing Receivable, Allowance for Credit Loss, Writeoff	0	36	0	42
Financing Receivable, Allowance for Credit Loss, Recovery	0	1	0	2
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	0	35	0	40
Provision for Loan, Lease, and Other Losses	(4)	30	(53)	0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	108	198	108	198
Ending balance	$ 108	$ 198	108	$ 198
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