LOANS AND ALLOWANCE FOR CREDIT LOSSES - Past due (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Current - 29 Days Past Due	$ 854,716	$ 850,257
Total	862,183	858,469	$ 779,028
90 Days or Greater Past Due and Still Accruing Interest	132	308
Financial Asset, 30 to 59 Days Past Due
Total	1,407	2,755
Financing Receivables, 60 to 89 Days Past Due
Total	914	124
Financing Receivables, Equal to Greater than 90 Days Past Due
Total	5,146	5,333
Financial Asset, Past Due
Total	7,467	8,212
Real Estate
Current - 29 Days Past Due	760,281	757,445
Total	767,060	764,880
90 Days or Greater Past Due and Still Accruing Interest	132	308
Real Estate | Financial Asset, 30 to 59 Days Past Due
Total	1,368	2,682
Real Estate | Financing Receivables, 60 to 89 Days Past Due
Total	903	59
Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due
Total	4,508	4,694
Real Estate | Financial Asset, Past Due
Total	6,779	7,435
Agricultural
Current - 29 Days Past Due	783	860
Total	783	860
Commercial and Industrial
Current - 29 Days Past Due	57,608	55,313
Total	58,280	56,077
Commercial and Industrial | Financial Asset, 30 to 59 Days Past Due
Total	34	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	638	639
Commercial and Industrial | Financial Asset, Past Due
Total	672	764
Commercial and industrial
Total		86,999	81,831
Consumer
Current - 29 Days Past Due	5,828	5,694
Total	5,844	5,707
Consumer | Financial Asset, 30 to 59 Days Past Due
Total	5	11
Consumer | Financing Receivables, 60 to 89 Days Past Due
Total	11	2
Consumer | Financial Asset, Past Due
Total	16	13
Consumer
Total		5,415	5,286
State and Political Subdivisions
Current - 29 Days Past Due	30,216	30,945
Total	$ 30,216	30,945
Commercial Real Estate
Total		611,549	549,921
Residential Real Estate
Total		$ 154,506	$ 141,990