Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 55,111	$ 58,696	$ 55,537	$ 68,444
Charge-offs	5,288	22,878	15,635	51,909
Recoveries	5,573	3,092	14,492	8,799
Net Charge-offs	(285)	19,786	1,143	43,110
Provision	2,498	16,655	3,500	30,231
Ending balance	57,894	55,565	57,894	55,565
Commercial Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,391	15,220	15,635	16,950
Charge-offs	3,297	16,515	6,781	26,476
Recoveries	216	215	1,133	807
Net Charge-offs	3,081	16,300	5,648	25,669
Provision	1,741	14,746	4,064	22,385
Ending balance	14,051	13,666	14,051	13,666
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,025	11,956	11,736	15,539
Charge-offs	457	953	1,533	6,822
Recoveries	358	164	620	503
Net Charge-offs	99	789	913	6,319
Provision	4,611	(294)	4,714	1,653
Ending balance	15,537	10,873	15,537	10,873
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,132	11,693	6,841	14,433
Charge-offs	100	2,969	1,771	8,298
Recoveries	4,026	690	5,874	2,456
Net Charge-offs	(3,926)	2,279	(4,103)	5,842
Provision	(4,704)	1,596	(4,590)	2,419
Ending balance	6,354	11,010	6,354	11,010
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,647	13,806	14,759	15,692
Charge-offs	725	1,159	2,047	6,782
Recoveries	620	1,421	5,260	3,217
Net Charge-offs	105	(262)	(3,213)	3,565
Provision	(942)	(179)	(4,372)	1,762
Ending balance	13,600	13,889	13,600	13,889
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,916	6,021	6,566	5,830
Charge-offs	709	1,282	3,503	3,531
Recoveries	353	602	1,604	1,816
Net Charge-offs	356	680	1,899	1,715
Provision	1,792	786	3,685	2,012
Ending balance	8,352	6,127	8,352	6,127
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	1	0
Net Charge-offs	0	0	(1)	0
Provision	0	0	(1)	0
Ending balance	$ 0	$ 0	$ 0	$ 0