Loans and Asset Quality Information (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Non-covered loans:
Total loans	$ 2,256,879	$ 2,251,957	$ 2,189,415
Percentage of Loans	100.00%	100.00%	100.00%
Unamortized net deferred loan costs	651	928	1,168
Loans - non-covered	2,257,530	2,252,885	2,190,583
Commercial, financial and agricultural [Member]
Non-covered loans:
Total loans	162,303	164,195	159,964
Percentage of Loans	7.00%	7.00%	7.00%
Real Estate construction, land development and other land loans [Member]
Non-covered loans:
Total loans	274,975	273,412	262,397
Percentage of Loans	12.00%	12.00%	12.00%
Real estate mortgage residential (1-4 family) first mortgages [Member]
Non-covered loans:
Total loans	718,962	730,712	712,802
Percentage of Loans	32.00%	32.00%	33.00%
Real estate mortgage home equity loans/lines of credit [Member]
Non-covered loans:
Total loans	213,542	213,016	214,473
Percentage of Loans	9.00%	10.00%	10.00%
Real estate mortgage commercial and other [Member]
Non-covered loans:
Total loans	825,450	804,621	771,711
Percentage of Loans	37.00%	36.00%	35.00%
Installment loans to individual [Member]
Non-covered loans:
Total loans	$ 61,647	$ 66,001	$ 68,068
Percentage of Loans	3.00%	3.00%	3.00%