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, 2013	Mar. 31, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 130,303	$ 179,424	$ 137,339
Average recorded investment	133,727	180,933
Interest income recognized	734	603
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	21,742	40,241
Average recorded investment	21,479	40,135
Interest income recognized	128	105
Construction Real Estate - Vision/SEPH Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	10,482	19,433
Average recorded investment	12,082	21,974
Interest income recognized
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	20,483	32,673
Average recorded investment	20,912	27,314
Interest income recognized	220	251
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	36,722	43,752
Average recorded investment	35,859	43,276
Interest income recognized	130	40
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	40,075	43,305
Average recorded investment	43,191	48,214
Interest income recognized	256	207
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	799	20
Average recorded investment	204	20
Interest income recognized