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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2022
Bank impaired loans
With No Related Allowance Recorded, Recorded investment	$ 26,512	$ 19,076
With An Allowance Recorded, Recorded Investment	7,229	7,747
Recorded Investment, Total	33,741	26,823
With No Related Allowance Recorded, Unpaid Principal Balance	27,021	19,172
With An Allowance Recorded, Unpaid Principal Balance	7,229	7,747
Unpaid Principal Balance, Total	34,250	26,919
With An Allowance Recorded, Related Allowance	1,722	826
With No Related Allowance Recorded, Average Recorded Investment	29,085	24,735
With An Allowance Recorded , Average Recorded Investment	6,301	6,601
Average Recorded Investment, Total	35,386	31,336
With No Related Allowance Recorded, Interest Income Recognized	259	1,030
With An Allowance Recorded, Interest Income Recognized	22	388
Interest Income Recognized, Total	281	1,418
Commercial/Agricultural Real Estate
Bank impaired loans
With No Related Allowance Recorded, Recorded investment	13,840	9,741
With An Allowance Recorded, Recorded Investment	6,481	7,108
Recorded Investment, Total	20,321	16,849
With No Related Allowance Recorded, Unpaid Principal Balance	14,116	9,766
With An Allowance Recorded, Unpaid Principal Balance	6,481	7,108
Unpaid Principal Balance, Total	20,597	16,874
With An Allowance Recorded, Related Allowance	1,280	519
With No Related Allowance Recorded, Average Recorded Investment	16,626	13,657
With An Allowance Recorded , Average Recorded Investment	5,285	6,028
Average Recorded Investment, Total	21,911	19,685
With No Related Allowance Recorded, Interest Income Recognized	136	549
With An Allowance Recorded, Interest Income Recognized	11	273
Interest Income Recognized, Total	147	822
C&I/Agricultural operating
Bank impaired loans
With No Related Allowance Recorded, Recorded investment	6,015	2,744
With An Allowance Recorded, Recorded Investment	438	538
Recorded Investment, Total	6,453	3,282
With No Related Allowance Recorded, Unpaid Principal Balance	6,167	2,754
With An Allowance Recorded, Unpaid Principal Balance	438	538
Unpaid Principal Balance, Total	6,605	3,292
With An Allowance Recorded, Related Allowance	373	249
With No Related Allowance Recorded, Average Recorded Investment	5,319	4,467
With An Allowance Recorded , Average Recorded Investment	415	273
Average Recorded Investment, Total	5,734	4,740
With No Related Allowance Recorded, Interest Income Recognized	50	200
With An Allowance Recorded, Interest Income Recognized	10	48
Interest Income Recognized, Total	60	248
Residential Mortgage
Bank impaired loans
With No Related Allowance Recorded, Recorded investment	6,447	5,846
With An Allowance Recorded, Recorded Investment	310	91
Recorded Investment, Total	6,757	5,937
With No Related Allowance Recorded, Unpaid Principal Balance	6,528	5,907
With An Allowance Recorded, Unpaid Principal Balance	310	91
Unpaid Principal Balance, Total	6,838	5,998
With An Allowance Recorded, Related Allowance	69	48
With No Related Allowance Recorded, Average Recorded Investment	6,882	6,304
With An Allowance Recorded , Average Recorded Investment	600	298
Average Recorded Investment, Total	7,482	6,602
With No Related Allowance Recorded, Interest Income Recognized	71	276
With An Allowance Recorded, Interest Income Recognized	1	65
Interest Income Recognized, Total	72	341
Consumer Installment
Bank impaired loans
With No Related Allowance Recorded, Recorded investment	210	745
With An Allowance Recorded, Recorded Investment	0	10
Recorded Investment, Total	210	755
With No Related Allowance Recorded, Unpaid Principal Balance	210	745
With An Allowance Recorded, Unpaid Principal Balance	0	10
Unpaid Principal Balance, Total	210	755
With An Allowance Recorded, Related Allowance	0	10
With No Related Allowance Recorded, Average Recorded Investment	258	307
With An Allowance Recorded , Average Recorded Investment	1	2
Average Recorded Investment, Total	259	309
With No Related Allowance Recorded, Interest Income Recognized	2	5
With An Allowance Recorded, Interest Income Recognized	0	2
Interest Income Recognized, Total	$ 2	$ 7

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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