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, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 60,257	$ 55,315	$ 59,468	$ 55,537
Charge-offs	7,695	3,839	11,522	10,347
Recoveries	6,609	2,962	13,450	8,919
Net Charge-offs	1,086	877	(1,928)	1,428
Provision	(1,260)	673	(3,485)	1,002
Ending balance	57,911	55,111	57,911	55,111
Commercial Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	13,762	15,417	14,218	15,635
Charge-offs	214	776	853	3,484
Recoveries	347	728	594	917
Net Charge-offs	(133)	48	259	2,567
Provision	301	22	237	2,323
Ending balance	14,196	15,391	14,196	15,391
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,754	11,070	15,899	11,736
Charge-offs	5,274	742	6,068	1,076
Recoveries	2,177	222	3,913	262
Net Charge-offs	3,097	520	2,155	814
Provision	(1,595)	475	(2,682)	103
Ending balance	11,062	11,025	11,062	11,025
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,121	7,556	6,855	6,841
Charge-offs	21	153	24	1,671
Recoveries	3,023	421	5,974	1,848
Net Charge-offs	(3,002)	(268)	(5,950)	(177)
Provision	(3,302)	(692)	(4,984)	114
Ending balance	7,821	7,132	7,821	7,132
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,207	14,634	14,251	14,759
Charge-offs	680	648	1,276	1,322
Recoveries	356	1,142	1,593	4,640
Net Charge-offs	324	(494)	(317)	(3,318)
Provision	636	(481)	(49)	(3,430)
Ending balance	14,519	14,647	14,519	14,647
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	8,413	6,638	8,245	6,566
Charge-offs	1,506	1,520	3,301	2,794
Recoveries	705	448	1,374	1,251
Net Charge-offs	801	1,072	1,927	1,543
Provision	2,701	1,350	3,995	1,893
Ending balance	10,313	6,916	10,313	6,916
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	1	1	2	1
Net Charge-offs	(1)	(1)	(2)	(1)
Provision	(1)	(1)	(2)	(1)
Ending balance	$ 0	$ 0	$ 0	$ 0