Loans and Asset Quality Information (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Covered loans:
Impaired Purchased Loans - Carrying Value	$ 3,288	$ 3,142
Impaired Purchased Loans - Unpaid Principal Balance	6,191	6,263
Nonimpaired Purchased Loans - Carrying Value	187,263	207,167
Nonimpaired Purchased Loans - Unpaid Principal Balance	231,450	261,497
Total Covered Loans - Carrying Value	190,551	210,309	263,468
Total Covered Loans - Unpaid Principal Balance	237,641	267,760
Commercial, financial and agricultural [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	72	75
Impaired Purchased Loans - Unpaid Principal Balance	133	136
Nonimpaired Purchased Loans - Carrying Value	2,694	4,199
Nonimpaired Purchased Loans - Unpaid Principal Balance	4,435	5,268
Total Covered Loans - Carrying Value	2,766	4,274
Total Covered Loans - Unpaid Principal Balance	4,568	5,404
Real Estate construction, land development and other land loans [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	329	325
Impaired Purchased Loans - Unpaid Principal Balance	555	564
Nonimpaired Purchased Loans - Carrying Value	26,596	31,509
Nonimpaired Purchased Loans - Unpaid Principal Balance	36,520	47,792
Total Covered Loans - Carrying Value	26,925	31,834
Total Covered Loans - Unpaid Principal Balance	37,075	48,356
Real estate mortgage residential (1-4 family) first mortgages [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	480	575
Impaired Purchased Loans - Unpaid Principal Balance	1,336	1,500
Nonimpaired Purchased Loans - Carrying Value	100,111	107,575
Nonimpaired Purchased Loans - Unpaid Principal Balance	117,875	126,882
Total Covered Loans - Carrying Value	100,591	108,150
Total Covered Loans - Unpaid Principal Balance	119,211	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	14,026	14,877
Nonimpaired Purchased Loans - Unpaid Principal Balance	16,923	18,318
Total Covered Loans - Carrying Value	14,039	14,891
Total Covered Loans - Unpaid Principal Balance	16,943	18,339
Real estate mortgage commercial and other [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	2,394	2,153
Impaired Purchased Loans - Unpaid Principal Balance	4,147	4,042
Nonimpaired Purchased Loans - Carrying Value	43,321	48,475
Nonimpaired Purchased Loans - Unpaid Principal Balance	55,179	62,630
Total Covered Loans - Carrying Value	45,715	50,628
Total Covered Loans - Unpaid Principal Balance	59,326	66,672
Installment loans to individual [Member]
Covered loans:
Nonimpaired Purchased Loans - Carrying Value	515	532
Nonimpaired Purchased Loans - Unpaid Principal Balance	518	607
Total Covered Loans - Carrying Value	515	532
Total Covered Loans - Unpaid Principal Balance	$ 518	$ 607