Allowance For Loan Losses (Allowance Calculation At The Segment Level And Adjusted Beginning Balance For The Allowance For Credit Losses) (Details) (USD $) In Thousands, unless otherwise specified	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	$ 120,174	$ 120,676	$ 143,575	$ 116,717
Charge-offs	31,859	19,205	85,670	48,056
Recoveries	2,557	1,280	6,351	4,290
Net Charge-offs	29,302	17,925	79,319	43,766
Provision	16,438	14,654	43,054	44,454
Ending balance	107,310	117,405	107,310	117,405
Commercial, Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	16,709		11,555
Charge-offs	5,199		12,370
Recoveries	154		1,050
Net Charge-offs	5,045		11,320
Provision	3,358		14,787
Ending balance	15,022		15,022
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	23,307		24,369
Charge-offs	6,505		14,855
Recoveries	845		1,669
Net Charge-offs	5,660		13,186
Provision	912		7,376
Ending balance	18,559		18,559
Construction Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	40,113		70,462
Charge-offs	12,587		39,686
Recoveries	621		834
Net Charge-offs	11,966		38,852
Provision	8,240		4,777
Ending balance	36,387		36,387
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	32,297		30,259
Charge-offs	5,886		13,162
Recoveries	341		1,232
Net Charge-offs	5,545		11,930
Provision	3,533		11,956
Ending balance	30,285		30,285
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	7,744		6,925
Charge-offs	1,682		5,597
Recoveries	595		1,562
Net Charge-offs	1,087		4,035
Provision	396		4,163
Ending balance	7,053		7,053
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4		5
Recoveries	1		4
Net Charge-offs	(1)		(4)
Provision	(1)		(5)
Ending balance	$ 4		$ 4