Loans (Average Recorded Investment And Interest Income Recognized On Loans Individually Evaluated For Impairment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 77,998	$ 69,224	$ 77,998	$ 69,224	$ 80,664
Average recorded investment	84,736	69,933	81,191	69,541
Interest income recognized	767	409	4,011	1,513
Commercial Financial And Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	23,856	19,154	23,856	19,154
Average recorded investment	26,679	19,793	28,217	19,056
Interest income recognized	194	35	740	306
Construction Real Estate, SEPH Commercial Land and Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	1,700	2,045	1,700	2,045
Average recorded investment	1,700	2,068	1,906	2,073
Interest income recognized	0	0	0	8
Construction Real Estate - Remaining Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	2,677	5,993	2,677	5,993
Average recorded investment	3,943	6,059	4,338	5,771
Interest income recognized	16	2	44	13
Residential Real Estate - Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	23,700	24,370	23,700	24,370
Average recorded investment	24,422	24,560	24,618	24,784
Interest income recognized	314	240	2,619	768
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	26,065	17,662	26,065	17,662
Average recorded investment	27,982	17,453	22,108	17,857
Interest income recognized	243	$ 132	608	$ 418
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 10		$ 4