LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	$ 31,974	$ 30,433	$ 33,619
Provision for (reversal of) for credit losses	0	2,150	(1,700)
Loans charged-off	(1,204)	(849)	(1,641)
Recoveries	150	240	155
Ending balance	30,920	31,974	30,433	$ 33,619
Commercial and industrial
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	4,382	3,600	4,033
Provision for (reversal of) for credit losses	(209)	902	(43)
Loans charged-off	(473)	(192)	(411)
Recoveries	19	72		21
Ending balance	3,719	4,382	3,600	4,033
Construction and development
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	4,889	4,221	4,735
Provision for (reversal of) for credit losses	(1,266)	668	(515)
Loans charged-off		0	0
Recoveries	0	0	1
Ending balance	3,623	4,889	4,221	4,735
Commercial real estate
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	12,658	13,765	15,780
Provision for (reversal of) for credit losses	(124)	(1,108)	(1,229)
Loans charged-off	(277)	0	(816)
Recoveries	0	1	30
Ending balance	12,257	12,658	13,765	15,780
Farmland
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	2,008	1,698	1,220
Provision for (reversal of) for credit losses	223	310	478
Loans charged-off		0	0
Ending balance	2,231	2,008	1,698	1,220
1-4 family residential
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	6,617	5,818	6,313
Provision for (reversal of) for credit losses	853	769	(495)
Loans charged-off		0	0
Recoveries	0	30	0
Ending balance	7,470	6,617	5,818	6,313
Multi-family residential
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	490	396	363
Provision for (reversal of) for credit losses	31	94	33
Loans charged-off		0	0
Ending balance	521	490	396	363
Consumer
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	778	762	929
Provision for (reversal of) for credit losses	238	283	(51)
Loans charged-off	(139)	(322)	(151)
Recoveries	68	55	35
Ending balance	945	778	762	929
Agricultural
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	149	169	239
Provision for (reversal of) for credit losses	4	(20)	(78)
Loans charged-off	(3)	0	0
Recoveries	2	0	8
Ending balance	152	149	169	239
Overdrafts
Allowance for credit losses:
Beginning balance, prior to adoption of ASC 326	3	4	7
Provision for (reversal of) for credit losses	250	252	200
Loans charged-off	(312)	(335)	(263)
Recoveries	61	82	60
Ending balance	$ 2	$ 3	$ 4	$ 7