Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 55,537	$ 68,444
Charge-offs	6,508	18,967
Recoveries	5,957	1,943
Net Charge-offs	551	17,024
Provision	329	8,338
Ending balance	55,315	59,758
Commercial, Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,635	16,950
Charge-offs	2,708	4,538
Recoveries	189	468
Net Charge-offs	2,519	4,070
Provision	2,301	5,448
Ending balance	15,417	18,328
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,736	15,539
Charge-offs	334	4,934
Recoveries	40	92
Net Charge-offs	294	4,842
Provision	(372)	1,309
Ending balance	11,070	12,006
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,841	14,433
Charge-offs	1,518	4,320
Recoveries	1,427	67
Net Charge-offs	91	4,253
Provision	806	(433)
Ending balance	7,556	9,747
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,759	15,692
Charge-offs	674	3,922
Recoveries	3,498	609
Net Charge-offs	(2,824)	3,313
Provision	(2,949)	1,489
Ending balance	14,634	13,868
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	6,566	5,830
Charge-offs	1,274	1,253
Recoveries	803	707
Net Charge-offs	471	546
Provision	543	525
Ending balance	6,638	5,809
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0
Charge-offs	0	0
Recoveries	0	0
Net Charge-offs	0	0
Provision	0	0
Ending balance	$ 0	$ 0