Loans and Allowance for Loan Losses (Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 1,543,795	$ 1,357,788
Commercial and agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	152,306	113,413
Real estate - construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	107,002	78,327
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	687,554	667,602
Real estate - mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	489,113	426,328
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	107,820	72,118
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,476,386	1,254,674
Pass [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	148,844	104,165
Pass [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	100,252	68,995
Pass [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	669,695	646,897
Pass [Member] | Real estate - mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	450,587	363,267
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	107,008	71,350
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	19,071	39,818
Special Mention [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	672	6,318
Special Mention [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,122	2,411
Special Mention [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	3,508	5,363
Special Mention [Member] | Real estate - mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	12,765	25,715
Special Mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	4	11
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	48,083	62,553
Substandard [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,790	2,930
Substandard [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	4,628	6,921
Substandard [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	14,351	15,342
Substandard [Member] | Real estate - mortgage, Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	25,761	36,984
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	553	376
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	255	743
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	362
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 255	$ 381