Allowance For Loan Losses (Impaired Loans, Average Recorded Investment and Interest Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	$ 63,662		$ 142,969	$ 64,307	$ 137,913
With no related allowance recorded, interest income recognized	184		2	231	2
With an allowance recorded, average recorded investment	43,601		116,638	42,508	153,828
With an allowance recorded, interest income recognized	247		1	275	1
Total average recorded investment	107,263	112,600	259,607	106,815	291,741
Total interest income recognized	431		3	506	3
Commercial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	2,170		3,086	2,651	3,756
With no related allowance recorded, interest income recognized	3		0	10	0
With an allowance recorded, average recorded investment	1,790		5,879	1,729	6,738
With an allowance recorded, interest income recognized	0		0	0	0
Total average recorded investment	3,960		8,965	4,380	10,494
Total interest income recognized	3		0	10	0
Real estate - construction [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	10,918		61,867	12,166	60,795
With no related allowance recorded, interest income recognized	30		0	34	0
With an allowance recorded, average recorded investment	16,567		60,059	14,308	65,267
With an allowance recorded, interest income recognized	7		0	9	0
Total average recorded investment	27,485		121,926	26,474	126,062
Total interest income recognized	37		0	43	0
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	15,944		19,685	17,071	20,692
With no related allowance recorded, interest income recognized	60		1	66	1
With an allowance recorded, average recorded investment	8,760		17,589	10,862	17,242
With an allowance recorded, interest income recognized	76		0	94	0
Total average recorded investment	24,704		37,274	27,933	37,934
Total interest income recognized	136		1	160	1
Real estate - mortgage, commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	33,630		58,170	31,720	52,421
With no related allowance recorded, interest income recognized	76		1	106	1
With an allowance recorded, average recorded investment	15,832		32,829	15,177	64,386
With an allowance recorded, interest income recognized	151		1	159	1
Total average recorded investment	49,462		90,999	46,897	116,807
Total interest income recognized	227		2	265	2
Consumer [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	1,000		161	699	249
With no related allowance recorded, interest income recognized	15		0	15	0
With an allowance recorded, average recorded investment	652		282	432	195
With an allowance recorded, interest income recognized	13		0	13	0
Total average recorded investment	1,652		443	1,131	444
Total interest income recognized	$ 28		$ 0	$ 28	$ 0