ALLOWANCE FOR CREDIT LOSSES - Charge-offs and recoveries by loan class and vintage (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	$ (140)	$ (511)
Recovery	350	1,043
Net (Charge-off) Recovery	210	532
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(44)	(495)
Recovery	328	889
Net (Charge-off) Recovery	284	394
Consumer
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(63)	(13)
Recovery	6	107
Net (Charge-off) Recovery	(57)	94
Agriculture
Financing Receivable, Recorded Investment [Line Items]
Recovery	10	47
Net (Charge-off) Recovery	10	47
1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(8)	(3)
Recovery	6
Net (Charge-off) Recovery	(2)	(3)
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(25)
Net (Charge-off) Recovery	(25)
2022
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(43)
Recovery	1
Net (Charge-off) Recovery	(42)
2022 | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(43)
Recovery	1
Net (Charge-off) Recovery	(42)
2021
Financing Receivable, Recorded Investment [Line Items]
Charge-offs		(10)
Recovery		4
Net (Charge-off) Recovery		(6)
2021 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Charge-offs		(10)
Recovery		4
Net (Charge-off) Recovery		(6)
2020
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(12)
Net (Charge-off) Recovery	(12)
2020 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(12)
Net (Charge-off) Recovery	(12)
2019
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(25)	(194)
Recovery	1	9
Net (Charge-off) Recovery	(24)	(185)
2019 | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Charge-offs		(191)
Recovery		5
Net (Charge-off) Recovery		(186)
2019 | Consumer
Financing Receivable, Recorded Investment [Line Items]
Charge-offs		(3)
Recovery	1	4
Net (Charge-off) Recovery	1	1
2019 | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(25)
Net (Charge-off) Recovery	(25)
2018
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(2)	(260)
Recovery	207	39
Net (Charge-off) Recovery	205	(221)
2018 | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Charge-offs		(260)
Recovery	207	39
Net (Charge-off) Recovery	207	(221)
2018 | 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(2)
Net (Charge-off) Recovery	(2)
2017
Financing Receivable, Recorded Investment [Line Items]
Recovery		43
Net (Charge-off) Recovery		43
2017 | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Recovery		43
Net (Charge-off) Recovery		43
Prior
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(7)	(3)
Recovery	74	908
Net (Charge-off) Recovery	67	905
Prior | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(1)
Recovery	55	762
Net (Charge-off) Recovery	54	762
Prior | Consumer
Financing Receivable, Recorded Investment [Line Items]
Recovery	3	99
Net (Charge-off) Recovery	3	99
Prior | Agriculture
Financing Receivable, Recorded Investment [Line Items]
Recovery	10	47
Net (Charge-off) Recovery	10	47
Prior | 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(6)	(3)
Recovery	6
Net (Charge-off) Recovery		(3)
Revolving Loans
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(1)
Recovery	65
Net (Charge-off) Recovery	64
Revolving Loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Recovery	65
Net (Charge-off) Recovery	65
Revolving Loans | Consumer
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(1)
Net (Charge-off) Recovery	(1)
Converted Revolving Loans
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(50)	(44)
Recovery	2	40
Net (Charge-off) Recovery	(48)	(4)
Converted Revolving Loans | Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Charge-offs		(44)
Recovery		40
Net (Charge-off) Recovery		$ (4)
Converted Revolving Loans | Consumer
Financing Receivable, Recorded Investment [Line Items]
Charge-offs	(50)
Recovery	2
Net (Charge-off) Recovery	$ (48)