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Loans and Asset Quality Information (Schedule of Impaired Loans) (Details) - All Total Loans [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Impaired loans
Impaired loans with no related allowance - Recorded Investment	$ 8,918	$ 11,565
Impaired loans with no related allowance - Unpaid Principal Balance	10,329	13,802
Impaired loans with no related allowance - Average Recorded Investment	11,888	13,461
Impaired loans with allowance - Recorded Investment	15,335	15,650
Impaired loans with allowance - Unpaid Principal Balance	15,484	15,893
Impaired loans with related allowance - Related Allowance	2,269	1,564
Impaired loans with related allowance - Average Recorded Investment	15,867	16,229
Commercial, financial, and agricultural [Member]
Impaired loans
Impaired loans with no related allowance - Recorded Investment	310	183
Impaired loans with no related allowance - Unpaid Principal Balance	310	425
Impaired loans with no related allowance - Average Recorded Investment	957	276
Impaired loans with allowance - Recorded Investment	386	396
Impaired loans with allowance - Unpaid Principal Balance	387	396
Impaired loans with related allowance - Related Allowance	226	215
Impaired loans with related allowance - Average Recorded Investment	422	214
Real estate - construction, land development & other land loans [Member]
Impaired loans
Impaired loans with no related allowance - Recorded Investment	485	2,743
Impaired loans with no related allowance - Unpaid Principal Balance	803	3,941
Impaired loans with no related allowance - Average Recorded Investment	2,366	2,846
Impaired loans with allowance - Recorded Investment	860	232
Impaired loans with allowance - Unpaid Principal Balance	864	241
Impaired loans with related allowance - Related Allowance	134	18
Impaired loans with related allowance - Average Recorded Investment	385	503
Real estate - mortgage - residential (1-4 family) first mortgages [Member]
Impaired loans
Impaired loans with no related allowance - Recorded Investment	4,626	5,205
Impaired loans with no related allowance - Unpaid Principal Balance	4,948	5,728
Impaired loans with no related allowance - Average Recorded Investment	4,804	7,067
Impaired loans with allowance - Recorded Investment	7,765	9,595
Impaired loans with allowance - Unpaid Principal Balance	7,904	9,829
Impaired loans with related allowance - Related Allowance	955	1,099
Impaired loans with related allowance - Average Recorded Investment	8,963	10,077
Real estate - mortgage - home equity loans / lines of credit [Member]
Impaired loans
Impaired loans with no related allowance - Recorded Investment	22	368
Impaired loans with no related allowance - Unpaid Principal Balance	31	387
Impaired loans with no related allowance - Average Recorded Investment	91	129
Impaired loans with allowance - Recorded Investment	274
Impaired loans with allowance - Unpaid Principal Balance	275
Impaired loans with related allowance - Related Allowance	48
Impaired loans with related allowance - Average Recorded Investment	184	66
Real estate - mortgage - commercial and other [Member]
Impaired loans
Impaired loans with no related allowance - Recorded Investment	3,475	3,066
Impaired loans with no related allowance - Unpaid Principal Balance	4,237	3,321
Impaired loans with no related allowance - Average Recorded Investment	3,670	3,143
Impaired loans with allowance - Recorded Investment	6,050	5,427
Impaired loans with allowance - Unpaid Principal Balance	6,054	5,427
Impaired loans with related allowance - Related Allowance	906	232
Impaired loans with related allowance - Average Recorded Investment	5,911	5,369
Installment loans to individuals [Member]
Impaired loans
Impaired loans with no related allowance - Recorded Investment
Impaired loans with no related allowance - Unpaid Principal Balance
Impaired loans with no related allowance - Average Recorded Investment
Impaired loans with allowance - Recorded Investment
Impaired loans with allowance - Unpaid Principal Balance
Impaired loans with related allowance - Related Allowance
Impaired loans with related allowance - Average Recorded Investment	$ 2

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