Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	$ 12,620	$ 29,990	$ 19,782	$ 30,493
Average Recorded Investment, With an allowance recorded	27,380	23,774	25,759	21,716
Total impaired loans, Average Recorded Investment	40,000	53,764	45,541	52,209
Interest Recognized For the Period Ended, With no related allowance recorded	56	51	208	93
Interest Recognized For the Period Ended, With an allowance recorded	13	35	33	98
Total impaired loans, With an allowance recorded	69	86	241	191
Commercial, financial, and agricultural [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	3,074	3,638	3,315	3,517
Average Recorded Investment, With an allowance recorded	2,890	963	2,615	661
Interest Recognized For the Period Ended, With no related allowance recorded	23	19	66	30
Interest Recognized For the Period Ended, With an allowance recorded	7	5	21	10
Real estate construction - residential [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	1,589	656	737	1,488
Average Recorded Investment, With an allowance recorded	189	0	189	0
Interest Recognized For the Period Ended, With no related allowance recorded	0	0	7	0
Interest Recognized For the Period Ended, With an allowance recorded	0	0	0	0
Real estate construction - commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	1,879	8,899	1,653	9,818
Average Recorded Investment, With an allowance recorded	6,192	186	6,180	83
Interest Recognized For the Period Ended, With no related allowance recorded	0	0	0	0
Interest Recognized For the Period Ended, With an allowance recorded	0	0	0	0
Real estate - residential [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	2,299	2,583	3,333	3,631
Average Recorded Investment, With an allowance recorded	3,037	3,664	2,566	3,286
Interest Recognized For the Period Ended, With no related allowance recorded	5	7	47	19
Interest Recognized For the Period Ended, With an allowance recorded	4	28	11	83
Real estate - commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	3,598	14,035	10,582	11,844
Average Recorded Investment, With an allowance recorded	15,072	18,961	14,209	17,686
Interest Recognized For the Period Ended, With no related allowance recorded	28	23	87	41
Interest Recognized For the Period Ended, With an allowance recorded	2	2	1	5
Installment and Other Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	181	179	162	195
Interest Recognized For the Period Ended, With no related allowance recorded	$ 0	$ 2	$ 1	$ 3

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524

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