Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Beginning balance	$ 68,444	$ 143,575
Charge-offs	18,967	11,506
Recoveries	1,943	2,361
Net Charge-offs	17,024	9,145
Provision	8,338	14,100
Ending balance	59,758	148,530
Allowance for Credit Losses	60,420
Centennial Bank [Member]
Provision	662
Allowance for Credit Losses	662
Commercial, Financial And Agricultural [Member]
Beginning balance	16,950	11,555
Charge-offs	4,538	1,841
Recoveries	468	569
Net Charge-offs	4,070	1,272
Provision	5,448	1,508
Ending balance	18,328	11,791
Allowance for Credit Losses	18,328
Commercial Real Estate [Member]
Beginning balance	15,539	24,369
Charge-offs	4,934	1,785
Recoveries	92	802
Net Charge-offs	4,842	983
Provision	1,309	1,834
Ending balance	12,006	25,220
Allowance for Credit Losses	12,006
Construction Real Estate [Member]
Beginning balance	14,433	70,462
Charge-offs	4,320	3,420
Recoveries	67	96
Net Charge-offs	4,253	3,324
Provision	(433)	4,697
Ending balance	9,747	71,835
Allowance for Credit Losses	9,747
Residential Real Estate [Member]
Beginning balance	15,692	30,259
Charge-offs	3,922	2,487
Recoveries	609	501
Net Charge-offs	3,313	1,986
Provision	1,489	4,142
Ending balance	13,868	32,415
Allowance for Credit Losses	13,868
Consumer [Member]
Beginning balance	5,830	6,925
Charge-offs	1,253	1,973
Recoveries	707	390
Net Charge-offs	546	1,583
Provision	525	1,923
Ending balance	5,809	7,265
Allowance for Credit Losses	5,809
Leases [Member]
Beginning balance		5
Recoveries		3
Net Charge-offs		(3)
Provision		(4)
Ending balance		$ 4