Loans and Allowance for Loan Losses (Impaired Loans, Average Recorded Investment and Interest Income Recognized) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	$ 51,163	$ 71,121	$ 100,306
With no related allowance recorded, interest income recognized	397	624	27
With an allowance recorded, average recorded investment	7,844	17,301	112,543
With an allowance recorded, interest income recognized	39	522	7
Impaired Financing Receivable, Average Recorded Investment	59,007	88,422	212,849
Impaired Financing Receivable, Interest Income, Cash Basis Method	436	1,146	34
Commercial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	784	1,989	3,202
With no related allowance recorded, interest income recognized	8	42	0
With an allowance recorded, average recorded investment	283	706	4,458
With an allowance recorded, interest income recognized	5	16	0
Impaired Financing Receivable, Average Recorded Investment	1,067	2,695	7,660
Impaired Financing Receivable, Interest Income, Cash Basis Method	13	58	0
Real estate - construction [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	9,075	15,130	41,164
With no related allowance recorded, interest income recognized	35	92	1
With an allowance recorded, average recorded investment	638	1,762	51,354
With an allowance recorded, interest income recognized	9	0	0
Impaired Financing Receivable, Average Recorded Investment	9,713	16,892	92,518
Impaired Financing Receivable, Interest Income, Cash Basis Method	44	92	1
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	11,920	18,237	17,077
With no related allowance recorded, interest income recognized	100	204	1
With an allowance recorded, average recorded investment	2,713	1,764	15,740
With an allowance recorded, interest income recognized	20	61	7
Impaired Financing Receivable, Average Recorded Investment	14,633	20,001	32,817
Impaired Financing Receivable, Interest Income, Cash Basis Method	120	265	8
Real estate - mortgage, commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	29,384	35,765	38,688
With no related allowance recorded, interest income recognized	254	286	25
With an allowance recorded, average recorded investment	4,127	13,069	40,777
With an allowance recorded, interest income recognized	4	445	0
Impaired Financing Receivable, Average Recorded Investment	33,511	48,834	79,465
Impaired Financing Receivable, Interest Income, Cash Basis Method	258	731	25
Consumer [Member]
Financing Receivable, Impaired [Line Items]
With no related alowance recorded, average recorded investment	0	0	175
With no related allowance recorded, interest income recognized	0	0	0
With an allowance recorded, average recorded investment	83	0	214
With an allowance recorded, interest income recognized	1	0	0
Impaired Financing Receivable, Average Recorded Investment	83	0	389
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 1	$ 0	$ 0