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Allowance for Loan Losses - Allowance and Loans by Impairment Methodology (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance balance attributable to loans:
Individually evaluated for impairment	$ 267	$ 428
Collectively evaluated for impairment	32,606	33,595
Total allowance	32,873	34,023	$ 35,726	$ 37,066
Loans:
Individually evaluated for impairment	5,274	5,777
Collectively evaluated for impairment	1,109,212	1,054,508
Acquired loans - PCI	705	1,835
Total loans	1,115,191	1,062,120
Real estate - residential mortgage
Allowance balance attributable to loans:
Individually evaluated for impairment	72	92
Collectively evaluated for impairment	2,008	2,154
Total allowance	2,080	2,246	2,371	2,559
Loans:
Individually evaluated for impairment	3,671	2,965
Collectively evaluated for impairment	177,517	181,652
Acquired loans - PCI	107	284
Total loans	181,295	184,901
Real estate - construction
Allowance balance attributable to loans:
Collectively evaluated for impairment	681	727
Total allowance	681	727	605	816
Loans:
Collectively evaluated for impairment	54,246	54,461
Total loans	54,246	54,461
Commercial, financial and agricultural
Allowance balance attributable to loans:
Individually evaluated for impairment	77	10
Collectively evaluated for impairment	7,044	6,678
Total allowance	7,121	6,688	7,478	7,393
Loans:
Individually evaluated for impairment	1,451	2,450
Collectively evaluated for impairment	498,798	452,024
Acquired loans - PCI	563	1,461
Total loans	500,812	455,935
Equity lines
Allowance balance attributable to loans:
Individually evaluated for impairment		326
Collectively evaluated for impairment	733	780
Total allowance	733	1,106	688	685
Loans:
Individually evaluated for impairment	31	357
Collectively evaluated for impairment	52,017	55,213
Acquired loans - PCI	35	90
Total loans	52,083	55,660
Consumer
Allowance balance attributable to loans:
Individually evaluated for impairment	118
Collectively evaluated for impairment	347	257
Total allowance	465	257	231	261
Loans:
Individually evaluated for impairment	121	5
Collectively evaluated for impairment	13,635	15,004
Total loans	13,756	15,009
Consumer finance
Allowance balance attributable to loans:
Collectively evaluated for impairment	21,793	22,999
Total allowance	21,793	22,999	$ 24,353	$ 25,352
Loans:
Collectively evaluated for impairment	312,999	296,154
Total loans	$ 312,999	$ 296,154

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The balance of financing receivables that were acquired loans.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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