LOANS AND ALLOWANCE FOR CREDIT LOSSES - Past due (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Current - 29 Days Past Due	$ 873,645	$ 850,257
Total	881,038	858,469	$ 845,675
90 Days or Greater Past Due and Still Accruing Interest	1,284	308
Financial Asset, 30 to 59 Days Past Due
Total	945	2,755
Financing Receivables, 60 to 89 Days Past Due
Total	177	124
Financing Receivables, Equal to Greater than 90 Days Past Due
Total	6,271	5,333
Financial Asset, Past Due
Total	7,393	8,212
Real Estate
Current - 29 Days Past Due	777,431	757,445
Total	784,126	764,880
90 Days or Greater Past Due and Still Accruing Interest	1,284	308
Real Estate | Financial Asset, 30 to 59 Days Past Due
Total	849	2,682
Real Estate | Financing Receivables, 60 to 89 Days Past Due
Total	177	59
Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Total	5,669	4,694
Real Estate | Financial Asset, Past Due
Total	6,695	7,435
Agricultural
Current - 29 Days Past Due	708	860
Total	708	860
Commercial and Industrial
Current - 29 Days Past Due	62,176	55,313
Total	62,866	56,077
Commercial and Industrial | Financial Asset, 30 to 59 Days Past Due
Total	88	62
Commercial and Industrial | Financing Receivables, 60 to 89 Days Past Due
Total		63
Commercial and Industrial | Financing Receivables, Equal to Greater than 90 Days Past Due
Total	602	639
Commercial and Industrial | Financial Asset, Past Due
Total	690	764
Commercial and industrial
Total		86,999	85,855
Consumer
Current - 29 Days Past Due	6,210	5,694
Total	6,218	5,707
Consumer | Financial Asset, 30 to 59 Days Past Due
Total	8	11
Consumer | Financing Receivables, 60 to 89 Days Past Due
Total		2
Consumer | Financial Asset, Past Due
Total	8	13
Consumer
Total		5,415	5,428
State and Political Subdivisions
Current - 29 Days Past Due	27,120	30,945
Total	$ 27,120	30,945
Commercial Real Estate
Total		611,549	600,068
Residential Real Estate
Total		$ 154,506	$ 154,324