Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor					108 months	96 months
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 2,928	$ 2,716	$ 5,915	$ 6,166
Financing Receivable, Allowance for Credit Loss, Recovery	1,644	1,813	3,989	3,984
Financing Receivables Allowance For Credit Losses Net Charge Offs	1,284	903	1,926	2,182
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	53,368	48,969	51,512	49,988	$ 49,988
Ending balance	54,003	49,452	54,003	49,452	51,512	$ 49,988
Provision for Loan, Lease, and Other Losses	1,919	1,386	4,417	1,646
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	715	287	913	936
Financing Receivable, Allowance for Credit Loss, Recovery	164	206	580	858
Financing Receivables Allowance For Credit Losses Net Charge Offs	551	81	333	78
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	17,337	14,077	16,777	15,022	15,022
Ending balance	17,370	14,478	17,370	14,478	16,777	15,022
Provision for Loan, Lease, and Other Losses	584	482	926	(466)
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	339	182	393	229
Financing Receivable, Allowance for Credit Loss, Recovery	55	89	114	176
Financing Receivables Allowance For Credit Losses Net Charge Offs	284	93	279	53
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,193	9,488	9,768	9,601	9,601
Ending balance	10,377	9,406	10,377	9,406	9,768	9,601
Provision for Loan, Lease, and Other Losses	468	11	888	(142)
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	0	31	0	31
Financing Receivable, Allowance for Credit Loss, Recovery	23	220	111	279
Financing Receivables Allowance For Credit Losses Net Charge Offs	(23)	(189)	(111)	(248)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	4,564	4,463	4,463	4,430	4,430
Ending balance	5,065	4,652	5,065	4,652	4,463	4,430
Provision for Loan, Lease, and Other Losses	478	0	491	(26)
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	62	102	91	218
Financing Receivable, Allowance for Credit Loss, Recovery	160	244	542	604
Financing Receivables Allowance For Credit Losses Net Charge Offs	(98)	(142)	(451)	(386)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,170	9,415	8,731	9,321	9,321
Ending balance	8,869	9,245	8,869	9,245	8,731	9,321
Provision for Loan, Lease, and Other Losses	(399)	(312)	(313)	(462)
Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	1,812	2,114	4,518	4,752
Financing Receivable, Allowance for Credit Loss, Recovery	1,241	1,054	2,641	2,067
Financing Receivables Allowance For Credit Losses Net Charge Offs	571	1,060	1,877	2,685
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	12,104	11,526	11,773	11,614	11,614
Ending balance	12,265	11,671	12,265	11,671	11,773	11,614
Provision for Loan, Lease, and Other Losses	732	1,205	2,369	2,742
Finance Leases Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Allowance for Credit Loss, Recovery	1	0	1	0
Financing Receivables Allowance For Credit Losses Net Charge Offs	(1)	0	(1)	0
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0	0
Ending balance	57	0	57	0	$ 0	$ 0
Provision for Loan, Lease, and Other Losses	$ 56	$ 0	$ 56	$ 0