Loans and the Allowance for Loan Losses (Details 7) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Loan portfolio not subject to risk rating
Loan portfolio	$ 1,460,584	$ 1,402,738
Commercial, financial, agricultural
Loan portfolio not subject to risk rating
Loan portfolio	93,582	89,666
Lease financing
Loan portfolio not subject to risk rating
Loan portfolio	1,767	53
Real estate – construction
Loan portfolio not subject to risk rating
Loan portfolio	50,056	43,535
Real estate – 1-4 family mortgage
Loan portfolio not subject to risk rating
Loan portfolio	977,845	941,521
Real estate – commercial mortgage
Loan portfolio not subject to risk rating
Loan portfolio	249,814	243,029
Installment loans to individuals
Loan portfolio not subject to risk rating
Loan portfolio	87,520	84,934
Performing
Loan portfolio not subject to risk rating
Loan portfolio	1,455,988	1,399,290
Performing | Commercial, financial, agricultural
Loan portfolio not subject to risk rating
Loan portfolio	93,449	89,490
Performing | Lease financing
Loan portfolio not subject to risk rating
Loan portfolio	1,767	53
Performing | Real estate – construction
Loan portfolio not subject to risk rating
Loan portfolio	50,045	43,535
Performing | Real estate – 1-4 family mortgage
Loan portfolio not subject to risk rating
Loan portfolio	973,910	938,994
Performing | Real estate – commercial mortgage
Loan portfolio not subject to risk rating
Loan portfolio	249,378	242,363
Performing | Installment loans to individuals
Loan portfolio not subject to risk rating
Loan portfolio	87,439	84,855
Non- Performing
Loan portfolio not subject to risk rating
Loan portfolio	4,596	3,448
Non- Performing | Commercial, financial, agricultural
Loan portfolio not subject to risk rating
Loan portfolio	133	176
Non- Performing | Lease financing
Loan portfolio not subject to risk rating
Loan portfolio	0	0
Non- Performing | Real estate – construction
Loan portfolio not subject to risk rating
Loan portfolio	11	0
Non- Performing | Real estate – 1-4 family mortgage
Loan portfolio not subject to risk rating
Loan portfolio	3,935	2,527
Non- Performing | Real estate – commercial mortgage
Loan portfolio not subject to risk rating
Loan portfolio	436	666
Non- Performing | Installment loans to individuals
Loan portfolio not subject to risk rating
Loan portfolio	$ 81	$ 79