Loans (Average Recorded Investment And Interest Income Recognized On Loans Individually Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 179,424	$ 238,959	$ 187,135
Average recorded investment	180,933	245,139
Interest income recognized	603	352
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	40,241	19,391
Average recorded investment	40,135	19,515
Interest income recognized	105	65
Construction Real Estate - Vision/SE LLC Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	19,433	82,060
Average recorded investment	21,974	84,272
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	32,673	26,126
Average recorded investment	27,314	26,789
Interest income recognized	251	78
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	43,752	58,123
Average recorded investment	43,276	59,465
Interest income recognized	40	139
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	43,305	53,259
Average recorded investment	48,214	55,076
Interest income recognized	207	70
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	20
Average recorded investment	$ 20	$ 22