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Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 2,832	$ 2,114
Unpaid Principal Balance, With no related allowance recorded	3,051	2,263
Recorded Investment, With an allowance recorded	8,054	7,030	$ 7,100
Unpaid Principal Balance, With an allowance recorded	8,580	7,228
Specific Reserves, With an allowance recorded	1,738	1,080	$ 1,300
Total impaired loans, Recorded Investment	10,886	9,144
Total impaired loans, Unpaid Principal Balance	11,631	9,491
Commercial, financial, and agricultural
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,442	564
Unpaid Principal Balance, With no related allowance recorded	1,473	706
Recorded Investment, With an allowance recorded	2,080	1,053
Unpaid Principal Balance, With an allowance recorded	2,288	1,078
Specific Reserves, With an allowance recorded	929	469
Real estate - residential
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,024	1,550
Unpaid Principal Balance, With no related allowance recorded	1,049	1,557
Recorded Investment, With an allowance recorded	4,149	3,921
Unpaid Principal Balance, With an allowance recorded	4,220	3,990
Specific Reserves, With an allowance recorded	528	319
Real estate - commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	366
Unpaid Principal Balance, With no related allowance recorded	529
Recorded Investment, With an allowance recorded	1,657	1,918
Unpaid Principal Balance, With an allowance recorded	1,887	1,988
Specific Reserves, With an allowance recorded	258	277
Real estate - commercial | Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded		49
Unpaid Principal Balance, With an allowance recorded		56
Specific Reserves, With an allowance recorded		7
Installment Loans to Individuals
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded	168	89
Unpaid Principal Balance, With an allowance recorded	185	116
Specific Reserves, With an allowance recorded	$ 23	$ 8

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
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