Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	$ 3,401	$ 3,418
Financing Receivable, Allowance for Credit Losses, Recovery	2,945	2,842
Financing Receivables Allowance For Credit Losses Net Charge Offs	456	576
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	56,494	54,352
Ending balance	56,948	55,408
Provision for Loan, Lease, and Other Losses	910	1,632
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	274	352
Financing Receivable, Allowance for Credit Losses, Recovery	427	291
Financing Receivables Allowance For Credit Losses Net Charge Offs	(153)	61
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,694	10,719
Ending balance	14,240	11,361
Provision for Loan, Lease, and Other Losses	393	703
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	1	130
Financing Receivable, Allowance for Credit Losses, Recovery	218	674
Financing Receivables Allowance For Credit Losses Net Charge Offs	(217)	(544)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,197	8,808
Ending balance	9,452	9,296
Provision for Loan, Lease, and Other Losses	38	(56)
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	939	285
Financing Receivables Allowance For Credit Losses Net Charge Offs	(939)	(285)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,564	8,652
Ending balance	8,687	8,755
Provision for Loan, Lease, and Other Losses	(816)	(182)
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	747	422
Financing Receivable, Allowance for Credit Losses, Recovery	471	924
Financing Receivables Allowance For Credit Losses Net Charge Offs	276	(502)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,514	14,772
Ending balance	13,388	14,512
Provision for Loan, Lease, and Other Losses	150	(762)
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	2,379	2,514
Financing Receivable, Allowance for Credit Losses, Recovery	890	666
Financing Receivables Allowance For Credit Losses Net Charge Offs	1,489	1,848
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,524	11,401
Ending balance	11,180	11,484
Provision for Loan, Lease, and Other Losses	1,145	1,931
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	0	2
Financing Receivables Allowance For Credit Losses Net Charge Offs	0	(2)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1	0
Ending balance	1	0
Provision for Loan, Lease, and Other Losses	$ 0	$ (2)