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, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 57,911	$ 55,111	$ 59,468	$ 55,537
Charge-offs	3,985	5,288	15,507	15,635
Recoveries	3,585	5,573	17,035	14,492
Net Charge-offs	4,738	(285)	2,810	1,143
Provision	4,501	2,498	1,016	3,500
Ending balance	57,674	57,894	57,674	57,894
Commercial Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,196	15,391	14,218	15,635
Charge-offs	874	3,297	1,727	6,781
Recoveries	161	216	755	1,133
Net Charge-offs	1,310	3,081	1,569	5,648
Provision	136	1,741	373	4,064
Ending balance	13,022	14,051	13,022	14,051
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,062	11,025	15,899	11,736
Charge-offs	463	457	6,531	1,533
Recoveries	161	358	4,074	620
Net Charge-offs	1,769	99	3,924	913
Provision	1,136	4,611	(1,546)	4,714
Ending balance	10,429	15,537	10,429	15,537
Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,821	7,132	6,855	6,841
Charge-offs	11	100	35	1,771
Recoveries	2,368	4,026	8,342	5,874
Net Charge-offs	(1,095)	(3,926)	(7,045)	(4,103)
Provision	(262)	(4,704)	(5,246)	(4,590)
Ending balance	8,654	6,354	8,654	6,354
Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,519	14,647	14,251	14,759
Charge-offs	623	725	1,899	2,047
Recoveries	284	620	1,877	5,260
Net Charge-offs	1,351	105	1,034	(3,213)
Provision	1,678	(942)	1,629	(4,372)
Ending balance	14,846	13,600	14,846	13,600
Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,313	6,916	8,245	6,566
Charge-offs	2,014	709	5,315	3,503
Recoveries	607	353	1,981	1,604
Net Charge-offs	1,407	356	3,334	1,899
Provision	1,817	1,792	5,812	3,685
Ending balance	10,723	8,352	10,723	8,352
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	4	0	6	1
Net Charge-offs	(4)	0	(6)	(1)
Provision	(4)	0	(6)	(1)
Ending balance	0	0	0	0
Assets Held-for-sale [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs			4,338
Assets Held-for-sale [Member] | Commercial Financial And Agricultural [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	597		597
Assets Held-for-sale [Member] | Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	1,467		1,467
Assets Held-for-sale [Member] | Assets Held-for-sale [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	4,338
Assets Held-for-sale [Member] | Construction Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	1,262		1,262
Assets Held-for-sale [Member] | Residential Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	1,012		1,012
Assets Held-for-sale [Member] | Consumer [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0		0
Assets Held-for-sale [Member] | Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	$ 0		$ 0