Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor			120 years	108 years
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 1,529	$ 2,479	$ 6,344	$ 8,394
Financing Receivable, Allowance for Credit Loss, Recovery	1,255	2,362	5,490	6,351
Financing Receivables Allowance For Credit Losses Net Charge Offs	274	117	854	2,043
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	73,476	54,003	56,679	51,512
Ending balance	87,038	55,853	87,038	55,853
Provision for Loan, Lease, and Other Losses	13,836	1,967	31,213	6,384
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	241	585	1,041	1,498
Financing Receivable, Allowance for Credit Loss, Recovery	181	403	1,061	983
Financing Receivables Allowance For Credit Losses Net Charge Offs	60	182	(20)	515
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	23,476	17,370	20,203	16,777
Ending balance	26,987	18,426	26,987	18,426
Provision for Loan, Lease, and Other Losses	3,571	1,238	6,764	2,164
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	45	8	45	401
Financing Receivable, Allowance for Credit Loss, Recovery	47	246	690	360
Financing Receivables Allowance For Credit Losses Net Charge Offs	(2)	(238)	(645)	41
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,469	10,377	10,229	9,768
Ending balance	22,888	10,438	22,888	10,438
Provision for Loan, Lease, and Other Losses	6,417	(177)	12,014	711
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	6	0
Financing Receivable, Allowance for Credit Loss, Recovery	35	432	628	543
Financing Receivables Allowance For Credit Losses Net Charge Offs	(35)	(432)	(622)	(543)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,828	5,065	5,311	4,463
Ending balance	8,407	5,432	8,407	5,432
Provision for Loan, Lease, and Other Losses	1,544	(65)	2,474	426
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	34	85	176	176
Financing Receivable, Allowance for Credit Loss, Recovery	189	98	457	640
Financing Receivables Allowance For Credit Losses Net Charge Offs	(155)	(13)	(281)	(464)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,507	8,869	8,610	8,731
Ending balance	11,208	8,931	11,208	8,931
Provision for Loan, Lease, and Other Losses	546	49	2,317	(264)
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	1,208	1,801	5,060	6,319
Financing Receivable, Allowance for Credit Loss, Recovery	803	1,183	2,654	3,824
Financing Receivables Allowance For Credit Losses Net Charge Offs	405	618	2,406	2,495
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,624	12,265	12,211	11,773
Ending balance	16,969	12,555	16,969	12,555
Provision for Loan, Lease, and Other Losses	1,750	908	7,164	3,277
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	1	0	16	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0	0	1
Financing Receivables Allowance For Credit Losses Net Charge Offs	1	0	16	(1)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	572	57	115	0
Ending balance	579	71	579	71
Provision for Loan, Lease, and Other Losses	$ 8	$ 14	$ 480	$ 70