Loans (Average Recorded Investment And Interest Income Recognized On Loans Individually Evaluated For Impairment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 169,690	$ 200,400	$ 169,690	$ 200,400	$ 187,135
Average recorded investment	174,963	226,828	177,738	236,430
Interest income recognized	817	246	1,420	598
Commercial, Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	41,591	24,008	41,591	24,008
Average recorded investment	42,056	20,688	41,218	20,203
Interest income recognized	205	41	310	106
Construction Real Estate - Vision/SEPH LLC Commercial Land And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	17,272	46,847	17,272	46,847
Average recorded investment	18,412	71,682	20,302	77,711
Interest income recognized
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	29,562	33,685	29,562	33,685
Average recorded investment	31,428	27,998	28,899	27,616
Interest income recognized	199	136	450	214
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	37,277	48,594	37,277	48,594
Average recorded investment	40,359	55,096	41,541	57,269
Interest income recognized	125	14	165	153
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	43,969	47,243	43,969	47,243
Average recorded investment	42,689	51,359	45,758	53,619
Interest income recognized	287	54	494	124
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	19	23	19	23
Average recorded investment	19	5	20	12
Interest income recognized	$ 1	$ 1	$ 1	$ 1