Loans and Allowance for Loan Losses (Past Due Status) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	$ 1,073	$ 6,588
60 - 89 days past due	1,472	1,318
More than 90 days past due	22,921	25,133
Nonaccrual	31,403	35,165
Total past due and nonaccrual	56,869	68,204
Current and accruing	1,212,996	1,144,044
Loans held for investment	1,269,865	1,212,248	[1]
Commercial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	86,332	72,252
Real estate - construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	72,024	64,083
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	660,004	636,107
Real estate - mortgage, commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	394,501	394,924
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment	57,004	44,882
PC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	683	5,461
60 - 89 days past due	1,147	1,293
More than 90 days past due	282	0
Nonaccrual	31,403	35,165
Total past due and nonaccrual	33,515	41,919
Current and accruing	1,094,426	1,008,677
Loans held for investment	1,127,941	1,050,596
PC [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	0	18
60 - 89 days past due	0	43
More than 90 days past due	0	0
Nonaccrual	400	516
Total past due and nonaccrual	400	577
Current and accruing	76,908	60,946
Loans held for investment	77,308	61,523
PC [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	136	168
60 - 89 days past due	0	634
More than 90 days past due	0	0
Nonaccrual	2,773	4,677
Total past due and nonaccrual	2,909	5,479
Current and accruing	58,678	48,711
Loans held for investment	61,587	54,190
PC [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	384	3,454
60 - 89 days past due	1,007	522
More than 90 days past due	76	0
Nonaccrual	9,007	11,580
Total past due and nonaccrual	10,474	15,556
Current and accruing	630,002	593,698
Loans held for investment	640,476	609,254
PC [Member] | Real estate - mortgage, commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	84	1,765
60 - 89 days past due	133	77
More than 90 days past due	206	0
Nonaccrual	19,192	18,380
Total past due and nonaccrual	19,615	20,222
Current and accruing	273,039	261,524
Loans held for investment	292,654	281,746
PC [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	79	56
60 - 89 days past due	7	17
More than 90 days past due	0	0
Nonaccrual	31	12
Total past due and nonaccrual	117	85
Current and accruing	55,799	43,798
Loans held for investment	55,916	43,883
PI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	390	1,127
60 - 89 days past due	325	25
More than 90 days past due	22,639	25,133
Nonaccrual	0	0
Total past due and nonaccrual	23,354	26,285
Current and accruing	118,570	135,367
Loans held for investment	141,924	161,652
PI [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	69	35
60 - 89 days past due	11	16
More than 90 days past due	2,250	1,977
Nonaccrual	0	0
Total past due and nonaccrual	2,330	2,028
Current and accruing	6,694	8,701
Loans held for investment	9,024	10,729
PI [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	0	48
60 - 89 days past due	0	0
More than 90 days past due	4,203	2,758
Nonaccrual	0	0
Total past due and nonaccrual	4,203	2,806
Current and accruing	6,234	7,087
Loans held for investment	10,437	9,893
PI [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	289	135
60 - 89 days past due	58	9
More than 90 days past due	2,921	2,907
Nonaccrual	0	0
Total past due and nonaccrual	3,268	3,051
Current and accruing	16,260	23,802
Loans held for investment	19,528	26,853
PI [Member] | Real estate - mortgage, commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	26	903
60 - 89 days past due	254	0
More than 90 days past due	13,252	17,479
Nonaccrual	0	0
Total past due and nonaccrual	13,532	18,382
Current and accruing	88,315	94,796
Loans held for investment	101,847	113,178
PI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 days past due	6	6
60 - 89 days past due	2	0
More than 90 days past due	13	12
Nonaccrual	0	0
Total past due and nonaccrual	21	18
Current and accruing	1,067	981
Loans held for investment	$ 1,088	$ 999

[1] Derived from audited consolidated financial statements