Allowance For Loan Losses (Allowance Calculation At The Segment Level And Adjusted Beginning Balance For The Allowance For Credit Losses) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 110,187	$ 120,676	$ 121,397	$ 116,717
Adjusted beginning balance:			121,397
Charge-offs	31,021	19,205	83,425	48,056
Recoveries	2,557	1,280	6,351	4,290
Net Charge-offs	28,464	17,925	77,074	43,766
Provision	18,525	14,654	55,925	44,454
Ending balance	100,248	117,405	100,248	117,405
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	12,607		13,584
Reallocation of allowance	(1,888)		(1,888)
Adjusted beginning balance:			11,696
Charge-offs	4,361		10,125
Recoveries	154		1,050
Net Charge-offs	4,207		9,075
Provision	2,733		8,512
Ending balance	11,133		11,133
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	22,470		28,515
Reallocation of allowance	(6,604)		(6,604)
Adjusted beginning balance:			21,911
Charge-offs	6,505		14,855
Recoveries	845		1,669
Net Charge-offs	5,660		13,186
Provision	1,749		9,834
Ending balance	18,559		18,559
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	35,280		46,194
Reallocation of allowance	5,759		5,759
Adjusted beginning balance:			51,953
Charge-offs	12,587		39,686
Recoveries	621		834
Net Charge-offs	11,966		38,852
Provision	9,900		20,113
Ending balance	33,214		33,214
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	32,105		25,845
Reallocation of allowance	2,948		2,948
Adjusted beginning balance:			28,793
Charge-offs	5,886		13,162
Recoveries	341		1,232
Net Charge-offs	5,545		11,930
Provision	3,725		13,422
Ending balance	30,285		30,285
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	7,721		7,228
Reallocation of allowance	(189)		(189)
Adjusted beginning balance:			7,039
Charge-offs	1,682		5,597
Recoveries	595		1,562
Net Charge-offs	1,087		4,035
Provision	419		4,049
Ending balance	7,053		7,053
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4		31
Reallocation of allowance	(26)		(26)
Adjusted beginning balance:			5
Recoveries	1		4
Net Charge-offs	(1)		(4)
Provision	(1)		(5)
Ending balance	$ 4		$ 4