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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	$ 30,382	$ 48,800	$ 31,372	$ 50,485
With no related allowance recorded, interest income recognized	59	7	353	102
With an allowance recorded, average recorded investment	7,840	2,975	7,919	6,109
With an allowance recorded, interest income recognized	50	0	198	11
Impaired Financing Receivable, Average Recorded Investment	38,222	51,775	39,291	56,594
Impaired Financing Receivable, Interest Income, Cash Basis Method	109	7	551	113
Commercial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	222	434	222	455
With no related allowance recorded, interest income recognized	0	0	0	7
With an allowance recorded, average recorded investment	0	0	0	107
With an allowance recorded, interest income recognized	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment	222	434	222	562
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	0	0	7
Real estate - construction [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	2,865	10,006	2,936	10,300
With no related allowance recorded, interest income recognized	8	3	29	23
With an allowance recorded, average recorded investment	0	97	0	220
With an allowance recorded, interest income recognized	0	0	0	6
Impaired Financing Receivable, Average Recorded Investment	2,865	10,103	2,936	10,520
Impaired Financing Receivable, Interest Income, Cash Basis Method	8	3	29	29
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	8,253	10,516	8,400	10,442
With no related allowance recorded, interest income recognized	23	0	87	14
With an allowance recorded, average recorded investment	3,413	2,605	3,440	1,682
With an allowance recorded, interest income recognized	12	0	45	4
Impaired Financing Receivable, Average Recorded Investment	11,666	13,121	11,840	12,124
Impaired Financing Receivable, Interest Income, Cash Basis Method	35	0	132	18
Real estate - mortgage, commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	19,042	27,844	19,814	29,288
With no related allowance recorded, interest income recognized	28	4	237	58
With an allowance recorded, average recorded investment	4,427	273	4,479	3,933
With an allowance recorded, interest income recognized	38	0	153	0
Impaired Financing Receivable, Average Recorded Investment	23,469	28,117	24,293	33,221
Impaired Financing Receivable, Interest Income, Cash Basis Method	66	4	390	58
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	0	0	167
With an allowance recorded, interest income recognized	0	0	0	1
Impaired Financing Receivable, Average Recorded Investment	0	0	0	167
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 0	$ 0	$ 0	$ 1