Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 3,800
Financing Receivable, Allowance for Credit Losses, Write-downs	4,140	$ 3,716	$ 11,960	$ 10,161
Financing Receivable, Allowance for Credit Losses, Recovery	6,369	2,368	12,847	8,644
Financing Receivables Allowance For Credit Losses Net Charge Offs	(2,229)	1,348	(887)	1,517
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	58,699	57,427	56,494	54,352
Ending balance	53,562	58,483	53,562	58,483
Provision for Loan, Lease, and Other Losses	(7,366)	2,404	(3,819)	5,648
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	457	829	1,601	1,680
Financing Receivable, Allowance for Credit Losses, Recovery	246	415	889	987
Financing Receivables Allowance For Credit Losses Net Charge Offs	211	414	712	693
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	16,478	12,124	13,694	10,719
Ending balance	16,270	13,259	16,270	13,259
Provision for Loan, Lease, and Other Losses	3	1,549	3,288	3,233
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	4	46	82	329
Financing Receivable, Allowance for Credit Losses, Recovery	973	386	3,005	2,188
Financing Receivables Allowance For Credit Losses Net Charge Offs	(969)	(340)	(2,923)	(1,859)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,203	9,467	9,197	8,808
Ending balance	10,573	9,455	10,573	9,455
Provision for Loan, Lease, and Other Losses	401	(352)	(1,547)	(1,212)
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	1,300	4	1,318	41
Financing Receivable, Allowance for Credit Losses, Recovery	3,659	274	4,708	1,238
Financing Receivables Allowance For Credit Losses Net Charge Offs	(2,359)	(270)	(3,390)	(1,197)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,256	8,670	8,564	8,652
Ending balance	5,358	8,990	5,358	8,990
Provision for Loan, Lease, and Other Losses	(5,257)	50	(6,596)	(859)
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	293	575	1,776	1,732
Financing Receivable, Allowance for Credit Losses, Recovery	348	461	1,226	1,808
Financing Receivables Allowance For Credit Losses Net Charge Offs	(55)	114	550	(76)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,180	15,268	13,514	14,772
Ending balance	11,328	15,022	11,328	15,022
Provision for Loan, Lease, and Other Losses	(1,907)	(132)	(1,636)	174
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	2,086	2,262	7,183	6,379
Financing Receivable, Allowance for Credit Losses, Recovery	1,142	832	3,017	2,420
Financing Receivables Allowance For Credit Losses Net Charge Offs	944	1,430	4,166	3,959
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,581	11,898	11,524	11,401
Ending balance	10,033	11,757	10,033	11,757
Provision for Loan, Lease, and Other Losses	(604)	1,289	2,675	4,315
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Recovery	1	0	2	3
Financing Receivables Allowance For Credit Losses Net Charge Offs	(1)	0	(2)	(3)
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1	0	1	0
Ending balance	0	0	0	0
Provision for Loan, Lease, and Other Losses	$ (2)	$ 0	$ (3)	$ (3)