Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 55,315	$ 59,758	$ 55,537	$ 68,444
Charge-offs	3,839	10,064	10,347	29,031
Recoveries	2,962	3,764	8,919	5,707
Net Charge-offs	877	6,300	1,428	23,324
Provision	673	5,238	1,002	13,576
Ending balance	55,111	58,696	55,111	58,696
Commercial, Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,417	18,328	15,635	16,950
Charge-offs	776	5,423	3,484	9,961
Recoveries	728	124	917	592
Net Charge-offs	48	5,299	2,567	9,369
Provision	22	2,191	2,323	7,639
Ending balance	15,391	15,220	15,391	15,220
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,070	12,006	11,736	15,539
Charge-offs	742	935	1,076	5,869
Recoveries	222	247	262	339
Net Charge-offs	520	688	814	5,530
Provision	475	638	103	1,947
Ending balance	11,025	11,956	11,025	11,956
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,556	9,747	6,841	14,433
Charge-offs	153	1,009	1,671	5,329
Recoveries	421	1,699	1,848	1,766
Net Charge-offs	(268)	(690)	(177)	3,563
Provision	(692)	1,256	114	823
Ending balance	7,132	11,693	7,132	11,693
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,634	13,868	14,759	15,692
Charge-offs	648	1,701	1,322	5,623
Recoveries	1,142	1,187	4,640	1,796
Net Charge-offs	(494)	514	(3,318)	3,827
Provision	(481)	452	(3,430)	1,941
Ending balance	14,647	13,806	14,647	13,806
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,638	5,809	6,566	5,830
Charge-offs	1,520	996	2,794	2,249
Recoveries	448	507	1,251	1,214
Net Charge-offs	1,072	489	1,543	1,035
Provision	1,350	701	1,893	1,226
Ending balance	6,916	6,021	6,916	6,021
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	1	0	1	0
Net Charge-offs	(1)	0	(1)	0
Provision	(1)	0	(1)	0
Ending balance	$ 0	$ 0	$ 0	$ 0