Allowance For Credit Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 81,448	$ 83,577	$ 83,197	$ 85,675
Financing Receivable, Allowance for Credit Loss, Writeoff	1,748	1,002	5,497	3,773
Financing Receivable, Allowance for Credit Loss, Recovery	1,071	3,582	4,685	7,060
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	677	(2,580)	812	(3,287)
Provision for Loan, Lease, and Other Losses	3,190	1,972	1,576	(6,923)
Ending balance	83,961	88,129	83,961	88,129
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				6,090
Commercial Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	12,747	15,222	14,025	25,608
Financing Receivable, Allowance for Credit Loss, Writeoff	543	221	1,456	675
Financing Receivable, Allowance for Credit Loss, Recovery	110	132	544	487
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	433	89	912	188
Provision for Loan, Lease, and Other Losses	563	843	(236)	(1,187)
Ending balance	12,877	15,976	12,877	15,976
Commercial Financial And Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(8,257)
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	22,339	22,749	25,466	23,480
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	598	0
Financing Receivable, Allowance for Credit Loss, Recovery	36	428	624	724
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(36)	(428)	(26)	(724)
Provision for Loan, Lease, and Other Losses	(1,653)	2,991	(4,770)	(155)
Ending balance	20,722	26,168	20,722	26,168
Commercial Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,119
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,391	5,670	5,758	7,288
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	33	0
Financing Receivable, Allowance for Credit Loss, Recovery	20	1,597	550	2,078
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(20)	(1,597)	(517)	(2,078)
Provision for Loan, Lease, and Other Losses	87	(1,003)	(1,777)	(1,204)
Ending balance	4,498	6,264	4,498	6,264
Construction Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				(1,898)
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,619	13,113	11,424	11,363
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	81	37
Financing Receivable, Allowance for Credit Loss, Recovery	20	729	106	859
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	(20)	(729)	(25)	(822)
Provision for Loan, Lease, and Other Losses	1,464	(2,080)	3,654	(3,544)
Ending balance	15,103	11,762	15,103	11,762
Residential Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				3,121
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	28,149	26,261	26,286	17,418
Financing Receivable, Allowance for Credit Loss, Writeoff	1,169	781	3,287	3,061
Financing Receivable, Allowance for Credit Loss, Recovery	884	696	2,859	2,912
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	285	85	428	149
Provision for Loan, Lease, and Other Losses	2,699	1,483	4,705	(535)
Ending balance	30,563	27,659	30,563	27,659
Consumer [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				10,925
Finance Leases Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	203	562	238	518
Financing Receivable, Allowance for Credit Loss, Writeoff	36	0	42	0
Financing Receivable, Allowance for Credit Loss, Recovery	1	0	2	0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total	35	0	40	0
Provision for Loan, Lease, and Other Losses	30	(262)	0	(298)
Ending balance	$ 198	$ 300	$ 198	300
Finance Leases Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 80