Loans and Allowance for Loan Losses (Troubled Debt Restructuring) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 loans	Sep. 30, 2012 loans	Sep. 30, 2013 loans	Sep. 30, 2012 loans
Financing Receivable, Modifications [Line Items]
Number of loans	0	1	11	20
Pre-modification outstanding recorded investment	$ 0	$ 202	$ 4,344	$ 4,142
Post-modification outstanding recorded investment	0	202	3,825	3,216
Commercial and agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0	0
Pre-modification outstanding recorded investment	0	0	0
Post-modification outstanding recorded investment	0	0	0
Real estate - construction [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0	0	9
Pre-modification outstanding recorded investment	0	0	0	2,526
Post-modification outstanding recorded investment	0	0	0	1,603
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	1	9	3
Pre-modification outstanding recorded investment	0	202	2,733	260
Post-modification outstanding recorded investment	0	202	2,630	260
Real estate - mortgage, commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0	2	8
Pre-modification outstanding recorded investment	0	0	1,611	1,356
Post-modification outstanding recorded investment	0	0	1,195	1,353
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	0	0	0
Pre-modification outstanding recorded investment	0	0	0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0