Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 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	$ 2,685	$ 2,987
Financing Receivable, Allowance for Credit Loss, Recovery	2,356	2,345
Financing Receivables Allowance For Credit Losses Net Charge Offs	329	642
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	56,679	51,512
Ending balance	61,503	53,368
Provision for Loan, Lease, and Other Losses	5,153	2,498
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	523	198
Financing Receivable, Allowance for Credit Loss, Recovery	700	416
Financing Receivables Allowance For Credit Losses Net Charge Offs	(177)	(218)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	20,203	16,777
Ending balance	21,544	17,337
Provision for Loan, Lease, and Other Losses	1,164	342
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	0	54
Financing Receivable, Allowance for Credit Loss, Recovery	300	59
Financing Receivables Allowance For Credit Losses Net Charge Offs	(300)	(5)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,229	9,768
Ending balance	11,591	10,193
Provision for Loan, Lease, and Other Losses	1,062	420
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	6	0
Financing Receivable, Allowance for Credit Loss, Recovery	230	88
Financing Receivables Allowance For Credit Losses Net Charge Offs	(224)	(88)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,311	4,463
Ending balance	5,493	4,564
Provision for Loan, Lease, and Other Losses	(42)	13
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	71	29
Financing Receivable, Allowance for Credit Loss, Recovery	96	382
Financing Receivables Allowance For Credit Losses Net Charge Offs	(25)	(353)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,610	8,731
Ending balance	9,017	9,170
Provision for Loan, Lease, and Other Losses	382	86
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	2,085	2,706
Financing Receivable, Allowance for Credit Loss, Recovery	1,030	1,400
Financing Receivables Allowance For Credit Losses Net Charge Offs	1,055	1,306
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	12,211	11,773
Ending balance	13,728	12,104
Provision for Loan, Lease, and Other Losses	2,572	1,637
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	0	0
Financing Receivables Allowance For Credit Losses Net Charge Offs	0	0
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	115	0
Ending balance	130	0
Provision for Loan, Lease, and Other Losses	$ 15	$ 0