Loans and Allowance for Credit Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Contract	Jun. 30, 2011 Contract	Jun. 30, 2012 Contract	Jun. 30, 2011 Contract
Troubled debt restructurings identified during the period
Number of Contracts	6	7	8	31
Extend Maturity	$ 1,270	$ 10,033	$ 1,270	$ 17,617
Modify Rate	18	15	115	331
Modify Payments	6,112	924	6,112	3,740
Total Pre-Modification Outstanding Recorded Investment	7,400	10,972	7,497	21,688
Post-Modification Outstanding Recorded Investment	7,391	10,929	7,442	21,600
Specific Reserve	2,760	250	2,760	2,478
Commercial, Financial, Agricultural and Other [Member]
Troubled debt restructurings identified during the period
Number of Contracts	4	0	4	9
Extend Maturity	447	0	447	100
Modify Rate	18	0	18	105
Modify Payments	6,029	0	6,029	2,168
Total Pre-Modification Outstanding Recorded Investment	6,494	0	6,494	2,373
Post-Modification Outstanding Recorded Investment	6,494	0	6,494	2,370
Specific Reserve	2,760	0	2,760	720
Real Estate Construction [Member]
Troubled debt restructurings identified during the period
Number of Contracts	1	1	1	4
Extend Maturity	823	0	823	354
Modify Rate	0	0	0	0
Modify Payments	0	0	0	0
Total Pre-Modification Outstanding Recorded Investment	823	0	823	354
Post-Modification Outstanding Recorded Investment	815	0	815	371
Specific Reserve	0	0	0	15
Residential Real Estate Financing Receivable [Member]
Troubled debt restructurings identified during the period
Number of Contracts	1	2	3	3
Extend Maturity	0	0	0	0
Modify Rate	0	15	97	27
Modify Payments	83	75	83	75
Total Pre-Modification Outstanding Recorded Investment	83	90	180	102
Post-Modification Outstanding Recorded Investment	82	90	133	101
Specific Reserve	0	0	0	0
Commercial Real Estate Financing Receivable [Member]
Troubled debt restructurings identified during the period
Number of Contracts		4		15
Extend Maturity		10,033		17,163
Modify Rate		0		199
Modify Payments		849		1,497
Total Pre-Modification Outstanding Recorded Investment		10,882		18,859
Post-Modification Outstanding Recorded Investment		10,839		18,758
Specific Reserve		$ 250		$ 1,743