LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES, Past Due (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Recorded investment of past due [Abstract]
Total past due	$ 2,313,242	$ 2,248,836
90 days or greater and accruing	276	516
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	25,701	12,187
Nonaccrual With a related allowance	5,648	4,398
Nonaccrual Without a related allowance	20,053	7,789
90 days or greater past due and accruing	276	516
Total non-performing loans	25,977	12,703
Financing receivables on accrual status [Abstract]
Total financing receivables and still accruing	$ 2,287,541	2,236,649
Minimum [Member]
Financing receivables on nonaccrual status [Abstract]
Period of past due after which loans considered as non accrual	90 days
Current [Member]
Recorded investment of past due [Abstract]
Total past due	$ 2,289,044	2,229,685
Financing receivables on nonaccrual status [Abstract]
Current and non-accrual	9,795	4,008
Financing receivable nonaccrual status	2,289,044	2,229,685
Financing receivables on accrual status [Abstract]
Current and still accruing	2,279,249	2,225,677
Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	24,198	19,151
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	15,906	8,179
Financing receivables on accrual status [Abstract]
Total past due and still accruing	8,292	10,972
30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	8,245	9,251
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	2,428	199
Financing receivables on accrual status [Abstract]
Total past due and still accruing	5,817	9,052
60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	2,199	2,070
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	0	666
Financing receivables on accrual status [Abstract]
Total past due and still accruing	2,199	1,404
90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	13,754	7,830
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	13,478	7,314
Financing receivables on accrual status [Abstract]
Total past due and still accruing	276	516
Home Equity [Member]
Recorded investment of past due [Abstract]
Total past due	49,663	49,791
Commercial [Member]
Recorded investment of past due [Abstract]
Total past due	1,121,435	1,092,887
Construction [Member]
Recorded investment of past due [Abstract]
Total past due	164,326	195,826
Real Estate Loans [Member] | Mortgages [Member]
Recorded investment of past due [Abstract]
Total past due	301,735	310,199
90 days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	2,706	2,961
Nonaccrual With a related allowance	165	315
Nonaccrual Without a related allowance	2,541	2,646
90 days or greater past due and accruing	0	0
Total non-performing loans	2,706	2,961
Real Estate Loans [Member] | Mortgages [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	298,439	304,917
Real Estate Loans [Member] | Mortgages [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	3,296	5,282
Real Estate Loans [Member] | Mortgages [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,464	2,682
Real Estate Loans [Member] | Mortgages [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	227	360
Real Estate Loans [Member] | Mortgages [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,605	2,240
Real Estate Loans [Member] | Home Equity [Member]
Recorded investment of past due [Abstract]
Total past due	49,663	49,791
90 days or greater and accruing	0	18
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	165	121
Nonaccrual With a related allowance	0	0
Nonaccrual Without a related allowance	165	121
90 days or greater past due and accruing	0	18
Total non-performing loans	165	139
Real Estate Loans [Member] | Home Equity [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	49,207	49,508
Real Estate Loans [Member] | Home Equity [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	456	283
Real Estate Loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	138	145
Real Estate Loans [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	170	67
Real Estate Loans [Member] | Home Equity [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	148	71
Real Estate Loans [Member] | Commercial [Member]
Recorded investment of past due [Abstract]
Total past due	1,121,435	1,092,887
90 days or greater and accruing	0	404
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	14,364	1,135
Nonaccrual With a related allowance	2,099	256
Nonaccrual Without a related allowance	12,265	879
90 days or greater past due and accruing	0	404
Total non-performing loans	14,364	1,539
Real Estate Loans [Member] | Commercial [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	1,110,765	1,090,111
Real Estate Loans [Member] | Commercial [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	10,670	2,776
Real Estate Loans [Member] | Commercial [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	2,782	1,151
Real Estate Loans [Member] | Commercial [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,360	245
Real Estate Loans [Member] | Commercial [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	6,528	1,380
Real Estate Loans [Member] | Agricultural [Member]
Recorded investment of past due [Abstract]
Total past due	327,722	314,802
90 days or greater and accruing	269	75
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	4,062	2,670
Nonaccrual With a related allowance	0	181
Nonaccrual Without a related allowance	4,062	2,489
90 days or greater past due and accruing	269	75
Total non-performing loans	4,331	2,745
Real Estate Loans [Member] | Agricultural [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	324,168	313,290
Real Estate Loans [Member] | Agricultural [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	3,554	1,512
Real Estate Loans [Member] | Agricultural [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,569	72
Real Estate Loans [Member] | Agricultural [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	140	0
Real Estate Loans [Member] | Agricultural [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,845	1,440
Real Estate Loans [Member] | Construction [Member]
Recorded investment of past due [Abstract]
Total past due	164,326	195,826
90 days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	283	2,357
Nonaccrual With a related allowance	0	2,357
Nonaccrual Without a related allowance	283	0
90 days or greater past due and accruing	0	0
Total non-performing loans	283	2,357
Real Estate Loans [Member] | Construction [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	162,924	188,674
Real Estate Loans [Member] | Construction [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,402	7,152
Real Estate Loans [Member] | Construction [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,119	4,407
Real Estate Loans [Member] | Construction [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	388
Real Estate Loans [Member] | Construction [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	283	2,357
Consumer [Member]
Recorded investment of past due [Abstract]
Total past due	133,207	61,316
90 days or greater and accruing	7	13
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	1,002	701
Nonaccrual With a related allowance	1,002	701
Nonaccrual Without a related allowance	0	0
90 days or greater past due and accruing	7	13
Total non-performing loans	1,009	714
Consumer [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	131,886	60,995
Consumer [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,321	321
Consumer [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	292	16
Consumer [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	20	282
Consumer [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,009	23
Other Commercial Loans [Member]
Recorded investment of past due [Abstract]
Total past due	131,310	136,168
90 days or greater and accruing	0	6
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	2,582	1,750
Nonaccrual With a related allowance	2,382	588
Nonaccrual Without a related allowance	200	1,162
90 days or greater past due and accruing	0	6
Total non-performing loans	2,582	1,756
Other Commercial Loans [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	128,214	134,813
Other Commercial Loans [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	3,096	1,355
Other Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	478	670
Other Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	282	366
Other Commercial Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	2,336	319
Other Agricultural Loans [Member]
Recorded investment of past due [Abstract]
Total past due	29,662	30,673
90 days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	537	492
Nonaccrual With a related allowance	0	0
Nonaccrual Without a related allowance	537	492
90 days or greater past due and accruing	0	0
Total non-performing loans	537	492
Other Agricultural Loans [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	29,259	30,203
Other Agricultural Loans [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	403	470
Other Agricultural Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	403	108
Other Agricultural Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	362
Other Agricultural Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member]
Recorded investment of past due [Abstract]
Total past due	54,182	57,174
90 days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
90 days or greater past due and accruing	0	0
State and Political Subdivision Loans [Member] | Current [Member]
Recorded investment of past due [Abstract]
Total past due	54,182	57,174
State and Political Subdivision Loans [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	$ 0	$ 0