Loans and Allowance for Credit Losses (Details 6) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012 Contract	Jun. 30, 2011 Contract
Troubled Debt Restructuring recorded investment 90 days past due
Troubled Debt Restructuring number of contracts 90 days past due	0	2
Troubled Debt Restructuring recorded investment 90 days past due	$ 0	$ 238
Commercial, Financial, Agricultural and Other [Member]
Troubled Debt Restructuring recorded investment 90 days past due
Troubled Debt Restructuring number of contracts 90 days past due	0	1
Troubled Debt Restructuring recorded investment 90 days past due	0	150
Real Estate Construction [Member]
Troubled Debt Restructuring recorded investment 90 days past due
Troubled Debt Restructuring number of contracts 90 days past due	0	1
Troubled Debt Restructuring recorded investment 90 days past due	$ 0	$ 88