Loans and Allowance for Loan Losses (Impaired Loans, Average Recorded Investment and Interest Income Recognized) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	$ 30,382	$ 54,039	$ 30,705	$ 54,804
With no related allowance recorded, interest income recognized	63	35	206	185
With an allowance recorded, average recorded investment	9,763	6,064	9,820	6,109
With an allowance recorded, interest income recognized	47	4	123	11
Impaired Financing Receivable, Average Recorded Investment	40,145	60,103	40,525	60,913
Impaired Financing Receivable, Interest Income, Cash Basis Method	110	39	329	196
Commercial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	242	1,398	242	1,414
With no related allowance recorded, interest income recognized	0	1	0	8
With an allowance recorded, average recorded investment	0	107	0	107
With an allowance recorded, interest income recognized	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment	242	1,505	242	1,521
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	1	0	8
Real estate - construction [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	2,191	9,513	2,209	9,705
With no related allowance recorded, interest income recognized	7	0	18	0
With an allowance recorded, average recorded investment	583	219	594	220
With an allowance recorded, interest income recognized	0	3	0	6
Impaired Financing Receivable, Average Recorded Investment	2,774	9,732	2,803	9,925
Impaired Financing Receivable, Interest Income, Cash Basis Method	7	3	18	6
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	8,263	12,662	8,250	12,643
With no related allowance recorded, interest income recognized	23	9	51	33
With an allowance recorded, average recorded investment	3,706	1,662	3,722	1,682
With an allowance recorded, interest income recognized	14	1	32	4
Impaired Financing Receivable, Average Recorded Investment	11,969	14,324	11,972	14,325
Impaired Financing Receivable, Interest Income, Cash Basis Method	37	10	83	37
Real estate - mortgage, commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	19,686	30,466	20,004	31,042
With no related allowance recorded, interest income recognized	33	25	137	144
With an allowance recorded, average recorded investment	5,474	3,912	5,504	3,933
With an allowance recorded, interest income recognized	33	0	91	0
Impaired Financing Receivable, Average Recorded Investment	25,160	34,378	25,508	34,975
Impaired Financing Receivable, Interest Income, Cash Basis Method	66	25	228	144
Consumer [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	0	0	0	0
With no related allowance recorded, interest income recognized	0	0	0	0
With an allowance recorded, average recorded investment	0	164	0	167
With an allowance recorded, interest income recognized	0	0	0	1
Impaired Financing Receivable, Average Recorded Investment	0	164	0	167
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 0	$ 0	$ 0	$ 1