Loans and Asset Quality Information (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Non-covered loans:
Total loans	$ 2,092,819	$ 2,067,182
Percentage of Loans	100.00%	100.00%
Unamortized net deferred loan costs	1,324	1,280
Loans - non-covered	2,094,143	2,069,152
Commercial, financial and agricultural
Non-covered loans:
Total loans	155,273	152,627
Percentage of Loans	7.00%	8.00%
Loans - non-covered	170,741	172,357
Real Estate construction, land development and other land loans
Non-covered loans:
Total loans	251,569	290,983
Percentage of Loans	12.00%	14.00%
Real estate mortgage residential (1-4 family) first mortgages
Non-covered loans:
Total loans	679,401	646,616
Percentage of Loans	33.00%	31.00%
Real estate mortgage home equity loans/lines of credit
Non-covered loans:
Total loans	219,443	233,171
Percentage of Loans	11.00%	11.00%
Real estate mortgage commercial and other
Non-covered loans:
Total loans	715,973	666,882
Percentage of Loans	34.00%	32.00%
Installment loans to individual
Non-covered loans:
Total loans	$ 71,160	$ 77,593
Percentage of Loans	3.00%	4.00%