LOANS AND ALLOWANCE FOR CREDIT LOSSES, Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	$ 16,596	$ 14,792	$ 14,792
Total beginning balance	17,746	15,492	15,492
Charge-offs	(143)	(131)	(2,949)
Total charge offs	(143)
Recoveries	43	23	2,803
Total recoveries		23
Provision (recovery)	(250)	0
Provision for credit losses	(300)	0
Ending balance	16,246	15,484	16,596
Total ending balance	17,346	16,684	17,746
Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		800	800
Total beginning balance		1,300	1,300
Reserve for Unfunded Commitments [Member]
Activity in ACL on loans by loan class [Roll Forward]
Total beginning balance	1,150	700	700
Charge-offs		0
Total charge offs	0
Recoveries	0
Total recoveries		0
Provision for credit losses	(50)	0
Total ending balance	1,100	1,200	1,150
Reserve for Unfunded Commitments [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Total beginning balance		500	500
Commercial [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	2,041	1,491	1,491
Charge-offs	(130)	(127)	(366)
Recoveries	41	23	235
Provision (recovery)	(405)	(173)
Ending balance	1,547	1,903	2,041
Commercial [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		689	689
Commercial Real Estate [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	10,864	10,259	10,259
Charge-offs	0	0	0
Recoveries	0	0	0
Provision (recovery)	(368)	211
Ending balance	10,496	9,957	10,864
Commercial Real Estate [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		(513)	(513)
Agriculture [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	997	1,789	1,789
Charge-offs	0	0	(2,567)
Recoveries	0	0	2,567
Provision (recovery)	644	(98)
Ending balance	1,641	949	997
Agriculture [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		(742)	(742)
Residential Mortgage [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	2,005	896	896
Charge-offs	0	(3)	(3)
Recoveries	0	0	0
Provision (recovery)	(104)	9
Ending balance	1,901	1,825	2,005
Residential Mortgage [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		923	923
Residential Construction [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	334	181	181
Charge-offs	0	0	0
Recoveries	0	0	0
Provision (recovery)	27	51
Ending balance	361	453	334
Residential Construction [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		221	221
Consumer [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance	355	176	176
Charge-offs	(13)	(1)	(13)
Recoveries	2	0	1
Provision (recovery)	(44)	0
Ending balance	$ 300	397	355
Consumer [Member] | Impact of Adopting ASC 326 [Member] | ASU 2016-13 [Member]
Activity in ACL on loans by loan class [Roll Forward]
Beginning balance		$ 222	$ 222