Loans and the Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Loan portfolio not subject to risk rating
Loan portfolio	$ 1,402,738	$ 1,032,128
Performing
Loan portfolio not subject to risk rating
Loan portfolio	1,399,290	1,026,050
Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	3,448	6,078
Commercial, financial, agricultural
Loan portfolio not subject to risk rating
Loan portfolio	89,666	74,213
Commercial, financial, agricultural | Performing
Loan portfolio not subject to risk rating
Loan portfolio	89,490	74,003
Commercial, financial, agricultural | Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	176	210
Lease financing
Loan portfolio not subject to risk rating
Loan portfolio	53	195
Lease financing | Performing
Loan portfolio not subject to risk rating
Loan portfolio	53	195
Lease financing | Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	0	0
Real estate – construction
Loan portfolio not subject to risk rating
Loan portfolio	43,535	31,774
Real estate – construction | Performing
Loan portfolio not subject to risk rating
Loan portfolio	43,535	31,774
Real estate – construction | Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	0	0
Real estate – 1-4 family mortgage
Loan portfolio not subject to risk rating
Loan portfolio	941,521	675,402
Real estate – 1-4 family mortgage | Performing
Loan portfolio not subject to risk rating
Loan portfolio	938,994	670,074
Real estate – 1-4 family mortgage | Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	2,527	5,328
Real estate – commercial mortgage
Loan portfolio not subject to risk rating
Loan portfolio	243,029	195,535
Real estate – commercial mortgage | Performing
Loan portfolio not subject to risk rating
Loan portfolio	242,363	195,086
Real estate – commercial mortgage | Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	666	449
Installment loans to individuals
Loan portfolio not subject to risk rating
Loan portfolio	84,934	55,009
Installment loans to individuals | Performing
Loan portfolio not subject to risk rating
Loan portfolio	84,855	54,918
Installment loans to individuals | Non-Performing
Loan portfolio not subject to risk rating
Loan portfolio	$ 79	$ 91