Loans and Allowance for Loan Losses (Impaired Loans, Average Recorded Investment and Interest Income Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	$ 24,430	$ 30,382	$ 23,595	$ 30,705
With no related allowance recorded, interest income recognized	89	63	101	206
With an allowance recorded, average recorded investment	4,646	9,763	6,110	9,820
With an allowance recorded, interest income recognized	14	47	43	123
Impaired Financing Receivable, Average Recorded Investment	29,076	40,145	29,705	40,525
Impaired Financing Receivable, Interest Income, Cash Basis Method	103	110	144	329
Commercial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	435	242	457	242
With no related allowance recorded, interest income recognized	0	0	0	0
With an allowance recorded, average recorded investment	0	0	0	0
With an allowance recorded, interest income recognized	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment	435	242	457	242
Impaired Financing Receivable, Interest Income, Cash Basis Method	0	0	0	0
Real estate - construction [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	1,126	2,191	1,201	2,209
With no related allowance recorded, interest income recognized	8	7	9	18
With an allowance recorded, average recorded investment	0	583	0	594
With an allowance recorded, interest income recognized	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment	1,126	2,774	1,201	2,803
Impaired Financing Receivable, Interest Income, Cash Basis Method	8	7	9	18
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	7,099	8,263	7,512	8,250
With no related allowance recorded, interest income recognized	24	23	27	51
With an allowance recorded, average recorded investment	4,646	3,706	4,195	3,722
With an allowance recorded, interest income recognized	14	14	17	32
Impaired Financing Receivable, Average Recorded Investment	11,745	11,969	11,707	11,972
Impaired Financing Receivable, Interest Income, Cash Basis Method	38	37	44	83
Real estate - mortgage, commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, average recorded investment	15,770	19,686	14,425	20,004
With no related allowance recorded, interest income recognized	57	33	65	137
With an allowance recorded, average recorded investment	0	5,474	1,915	5,504
With an allowance recorded, interest income recognized	0	33	26	91
Impaired Financing Receivable, Average Recorded Investment	15,770	25,160	16,340	25,508
Impaired Financing Receivable, Interest Income, Cash Basis Method	57	66	91	228
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	0
With an allowance recorded, interest income recognized	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment	0	0	0	0
Impaired Financing Receivable, Interest Income, Cash Basis Method	$ 0	$ 0	$ 0	$ 0