Loans and Allowance for Loan Losses (Loans Held for Investment) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 1,525,070	$ 1,543,795	[1]
Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	146,202	152,306
Real estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	113,984	107,002
Real Estate - Mortgage, 1-4 Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	656,821	687,554
Real estate - Mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	485,696	489,113
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	122,367	107,820
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,464,814	1,476,386
Pass [Member] | Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	138,177	148,844
Pass [Member] | Real estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	108,486	100,252
Pass [Member] | Real Estate - Mortgage, 1-4 Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	643,150	669,695
Pass [Member] | Real estate - Mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	453,787	450,587
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	121,214	107,008
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	20,436	19,071
Special Mention [Member] | Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	5,657	672
Special Mention [Member] | Real estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,784	2,122
Special Mention [Member] | Real Estate - Mortgage, 1-4 Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,222	3,508
Special Mention [Member] | Real estate - Mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	10,768	12,765
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	5	4
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	39,368	48,083
Substandard [Member] | Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,368	2,790
Substandard [Member] | Real estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	3,714	4,628
Substandard [Member] | Real Estate - Mortgage, 1-4 Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	11,449	14,351
Substandard [Member] | Real estate - Mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	21,141	25,761
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	696	553
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	452	255
Doubtful [Member] | Commercial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Doubtful [Member] | Real estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Doubtful [Member] | Real Estate - Mortgage, 1-4 Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Doubtful [Member] | Real estate - Mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 452	$ 255

[1] Derived from audited consolidated financial statements