Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	$ 14,327	$ 19,878
Average Recorded Investment, With an allowance recorded	27,499	29,575
Total impaired loans, Average Recorded Investment	41,826	49,453
Interest Recognized For the Period Ended, With no related allowance recorded	54	63
Interest Recognized For the Period Ended, With an allowance recorded	54	37
Total impaired loans, Interest Recognized For the Period Ended	108	100
Commercial, financial and agricultural [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	2,937	3,594
Average Recorded Investment, With an allowance recorded	990	1,752
Interest Recognized For the Period Ended, With no related allowance recorded	25	22
Interest Recognized For the Period Ended, With an allowance recorded	7	7
Real estate - construction residential [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	369	417
Average Recorded Investment, With an allowance recorded	2,273	189
Interest Recognized For the Period Ended, With no related allowance recorded	0	7
Interest Recognized For the Period Ended, With an allowance recorded	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	2,616	1,440
Average Recorded Investment, With an allowance recorded	6,475	6,330
Interest Recognized For the Period Ended, With no related allowance recorded	0	0
Interest Recognized For the Period Ended, With an allowance recorded	1	0
Real estate - residential [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	2,736	2,349
Average Recorded Investment, With an allowance recorded	4,082	4,729
Interest Recognized For the Period Ended, With no related allowance recorded	0	2
Interest Recognized For the Period Ended, With an allowance recorded	20	30
Real estate - commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	5,480	11,918
Average Recorded Investment, With an allowance recorded	13,634	16,575
Interest Recognized For the Period Ended, With no related allowance recorded	29	32
Interest Recognized For the Period Ended, With an allowance recorded	26	0
Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average Recorded Investment, With no related allowance recorded	189	160
Average Recorded Investment, With an allowance recorded	45	0
Interest Recognized For the Period Ended, With no related allowance recorded	0	0
Interest Recognized For the Period Ended, With an allowance recorded	$ 0	$ 0

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

+ References

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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Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

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- Definition

Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.

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Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.

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