Loans and Asset Quality Information (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Covered loans:
Impaired Purchased Loans - Carrying Value	$ 2,883	$ 3,142
Impaired Purchased Loans - Unpaid Principal Balance	5,973	6,263
Nonimpaired Purchased Loans - Carrying Value	173,972	207,167
Nonimpaired Purchased Loans - Unpaid Principal Balance	207,396	261,497
Total Covered Loans - Carrying Value	176,855	210,309	240,279
Total Covered Loans - Unpaid Principal Balance	213,369	267,760
Commercial, financial and agricultural [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	69	75
Impaired Purchased Loans - Unpaid Principal Balance	129	136
Nonimpaired Purchased Loans - Carrying Value	2,649	4,199
Nonimpaired Purchased Loans - Unpaid Principal Balance	3,015	5,268
Total Covered Loans - Carrying Value	2,718	4,274
Total Covered Loans - Unpaid Principal Balance	3,144	5,404
Real Estate construction, land development and other land loans [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	322	325
Impaired Purchased Loans - Unpaid Principal Balance	548	564
Nonimpaired Purchased Loans - Carrying Value	20,571	31,509
Nonimpaired Purchased Loans - Unpaid Principal Balance	28,878	47,792
Total Covered Loans - Carrying Value	20,893	31,834
Total Covered Loans - Unpaid Principal Balance	29,426	48,356
Real estate mortgage residential (1-4 family) first mortgages [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	429	575
Impaired Purchased Loans - Unpaid Principal Balance	1,317	1,500
Nonimpaired Purchased Loans - Carrying Value	95,321	107,575
Nonimpaired Purchased Loans - Unpaid Principal Balance	111,278	126,882
Total Covered Loans - Carrying Value	95,750	108,150
Total Covered Loans - Unpaid Principal Balance	112,595	128,382
Real estate mortgage home equity loans/lines of credit [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	13	14
Impaired Purchased Loans - Unpaid Principal Balance	20	21
Nonimpaired Purchased Loans - Carrying Value	13,826	14,877
Nonimpaired Purchased Loans - Unpaid Principal Balance	16,359	18,318
Total Covered Loans - Carrying Value	13,839	14,891
Total Covered Loans - Unpaid Principal Balance	16,379	18,339
Real estate mortgage commercial and other [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	2,050	2,153
Impaired Purchased Loans - Unpaid Principal Balance	3,959	4,042
Nonimpaired Purchased Loans - Carrying Value	41,099	48,475
Nonimpaired Purchased Loans - Unpaid Principal Balance	47,359	62,630
Total Covered Loans - Carrying Value	43,149	50,628
Total Covered Loans - Unpaid Principal Balance	51,318	66,672
Installment loans to individual [Member]
Covered loans:
Nonimpaired Purchased Loans - Carrying Value	506	532
Nonimpaired Purchased Loans - Unpaid Principal Balance	507	607
Total Covered Loans - Carrying Value	506	532
Total Covered Loans - Unpaid Principal Balance	$ 507	$ 607