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Loans and Asset Quality Information (Schedule of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Company's nonaccrual loans:
Nonaccrual loans	$ 18,267	$ 20,968	$ 23,350
Commercial, financial, and agricultural [Member]
Company's nonaccrual loans:
Nonaccrual loans	2,092	1,001
Real estate construction, land development & other land loans [Member]
Company's nonaccrual loans:
Nonaccrual loans	651	1,822
Real estate mortgage residential (1-4 family) first mortgages [Member]
Company's nonaccrual loans:
Nonaccrual loans	8,807	12,201
Real estate mortgage home equity loans / lines of credit [Member]
Company's nonaccrual loans:
Nonaccrual loans	1,419	2,524
Real estate mortgage commercial and other [Member]
Company's nonaccrual loans:
Nonaccrual loans	5,178	3,345
Installment loans to individuals [Member]
Company's nonaccrual loans:
Nonaccrual loans	$ 120	$ 75

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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