LOANS - Impaired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Business Activities Loans
Recorded Investment
Total	$ 5,446	$ 7,950
Unpaid Principal Balance
Total	5,871	8,408
Related Allowance
With an allowance recorded	434	1,452
Business Activities Loans \| Construction and land development
Recorded Investment
With an allowance recorded	189	258
Unpaid Principal Balance
With an allowance recorded	199	258
Related Allowance
With an allowance recorded	139	205
Business Activities Loans \| Other commercial real estate
Recorded Investment
With no related allowance	748	1,911
With an allowance recorded	1,285	1,795
Unpaid Principal Balance
With no related allowance	832	1,957
With an allowance recorded	1,356	1,940
Related Allowance
With an allowance recorded	227	1,026
Business Activities Loans \| Commercial
Recorded Investment
With no related allowance	851	710
With an allowance recorded		282
Unpaid Principal Balance
With no related allowance	958	773
With an allowance recorded		289
Related Allowance
With an allowance recorded		164
Business Activities Loans \| Agricultural
Recorded Investment
With no related allowance	146	361
Unpaid Principal Balance
With no related allowance	150	361
Business Activities Loans \| Residential mortgages
Recorded Investment
With no related allowance	612	2,067
With an allowance recorded	1,603	553
Unpaid Principal Balance
With no related allowance	701	2,227
With an allowance recorded	1,663	590
Related Allowance
With an allowance recorded	67	57
Business Activities Loans \| Home equity
Recorded Investment
With an allowance recorded	12	13
Unpaid Principal Balance
With an allowance recorded	12	13
Related Allowance
With an allowance recorded	1
Business Activities Loans \| Total commercial real estate
Recorded Investment
Total	2,222	3,964
Unpaid Principal Balance
Total	2,387	4,155
Related Allowance
With an allowance recorded	366	1,231
Business Activities Loans \| Total commercial and industrial
Recorded Investment
Total	997	1,353
Unpaid Principal Balance
Total	1,108	1,423
Related Allowance
With an allowance recorded		164
Business Activities Loans \| Total residential real estate
Recorded Investment
Total	2,215	2,620
Unpaid Principal Balance
Total	2,364	2,817
Related Allowance
With an allowance recorded	67	57
Business Activities Loans \| Total consumer
Recorded Investment
Total	12	13
Unpaid Principal Balance
Total	12	13
Related Allowance
With an allowance recorded	1
Acquired Loans
Recorded Investment
Total	3,300	1,675
Unpaid Principal Balance
Total	3,584	2,053
Related Allowance
With an allowance recorded	296	61
Acquired Loans \| Other commercial real estate
Recorded Investment
With no related allowance	1,567	90
With an allowance recorded	771	168
Unpaid Principal Balance
With no related allowance	1,595	90
With an allowance recorded	791	168
Related Allowance
With an allowance recorded	290	12
Acquired Loans \| Commercial
Recorded Investment
With no related allowance	229	385
With an allowance recorded	65
Unpaid Principal Balance
With no related allowance	332	481
With an allowance recorded	67
Related Allowance
With an allowance recorded	5
Acquired Loans \| Residential mortgages
Recorded Investment
With no related allowance	423	678
With an allowance recorded	245	354
Unpaid Principal Balance
With no related allowance	465	938
With an allowance recorded	334	376
Related Allowance
With an allowance recorded	1	49
Acquired Loans \| Total commercial real estate
Recorded Investment
Total	2,338	258
Unpaid Principal Balance
Total	2,386	258
Related Allowance
With an allowance recorded	290	12
Acquired Loans \| Total commercial and industrial
Recorded Investment
Total	294	385
Unpaid Principal Balance
Total	399	481
Related Allowance
With an allowance recorded	5
Acquired Loans \| Total residential real estate
Recorded Investment
Total	668	1,032
Unpaid Principal Balance
Total	799	1,314
Related Allowance
With an allowance recorded	$ 1	$ 49

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