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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Credit Quality of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 2,869,611	$ 2,870,871
Current fiscal year, write-offs	1,450	14,338
Fiscal year before current fiscal year	1,733,843	2,546,512
Fiscal year before current fiscal year, write-offs	40,529	4,012
Two years before current fiscal year	1,937,367	2,063,941
Two years before current fiscal year, write-offs	1,681	1,350
Three years before current fiscal year	1,569,313	1,410,944
Three years before current fiscal year, write-offs	8,947	5,894
Four years before current fiscal year	1,142,386	529,690
Four years before current fiscal year, write-offs	576	338
Prior	1,139,559	892,018
Prior, write-offs	1,060	2,107
Revolving loans amortized cost basis	2,447,911	2,164,828
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	14,369	7,223
Revolving loans converted to term, write-offs	0	0
Total	12,854,359	12,486,027
Total, write-offs	54,243	28,039
Commercial and industrial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,359,867	1,223,491
Current fiscal year, write-offs	1,242	13,973
Fiscal year before current fiscal year	539,311	498,757
Fiscal year before current fiscal year, write-offs	39,087	2,711
Two years before current fiscal year	244,687	272,427
Two years before current fiscal year, write-offs	341	576
Three years before current fiscal year	166,561	93,854
Three years before current fiscal year, write-offs	8,605	5,665
Four years before current fiscal year	58,942	52,403
Four years before current fiscal year, write-offs	500	78
Prior	51,036	46,773
Prior, write-offs	424	261
Revolving loans amortized cost basis	1,693,245	1,483,039
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	643	204
Revolving loans converted to term, write-offs	0	0
Total	4,114,292	3,670,948
Total, write-offs	50,199	23,264
Commercial and industrial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,314,174	1,175,967
Fiscal year before current fiscal year	493,138	474,601
Two years before current fiscal year	196,877	253,148
Three years before current fiscal year	158,215	86,226
Four years before current fiscal year	55,639	47,910
Prior	49,554	45,020
Revolving loans amortized cost basis	1,576,409	1,393,756
Revolving loans converted to term	130	60
Total	3,844,136	3,476,688
Commercial and industrial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	14,982	34,356
Fiscal year before current fiscal year	13,282	3,911
Two years before current fiscal year	20,837	1,546
Three years before current fiscal year	1,097	5,149
Four years before current fiscal year	2,222	2,986
Prior	348	241
Revolving loans amortized cost basis	41,187	45,994
Revolving loans converted to term	0	0
Total	93,955	94,183
Commercial and industrial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	29,238	12,311
Fiscal year before current fiscal year	32,285	20,245
Two years before current fiscal year	26,973	17,733
Three years before current fiscal year	7,249	2,479
Four years before current fiscal year	1,081	1,507
Prior	1,134	1,512
Revolving loans amortized cost basis	75,649	40,449
Revolving loans converted to term	513	144
Total	174,122	96,380
Commercial and industrial loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,473	857
Fiscal year before current fiscal year	606	0
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	2,840
Revolving loans converted to term	0	0
Total	2,079	3,697
Agricultural land, production and other loans to farmers
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	31,323	35,691
Current fiscal year, write-offs	0	0
Fiscal year before current fiscal year	23,118	38,561
Fiscal year before current fiscal year, write-offs	0	0
Two years before current fiscal year	31,563	31,511
Two years before current fiscal year, write-offs	0	0
Three years before current fiscal year	27,124	31,502
Three years before current fiscal year, write-offs	0	0
Four years before current fiscal year	27,585	12,995
Four years before current fiscal year, write-offs	0	0
Prior	30,433	25,620
Prior, write-offs	0	0
Revolving loans amortized cost basis	85,166	87,534
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	0	0
Revolving loans converted to term, write-offs	0	0
Total	256,312	263,414
Total, write-offs	0	0
Agricultural land, production and other loans to farmers | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	28,600	35,633
Fiscal year before current fiscal year	23,070	38,145
Two years before current fiscal year	30,518	31,511
Three years before current fiscal year	26,442	31,048
Four years before current fiscal year	27,105	12,995
Prior	29,930	25,462
Revolving loans amortized cost basis	84,502	87,534
Revolving loans converted to term	0	0
Total	250,167	262,328
Agricultural land, production and other loans to farmers | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	169	0
Fiscal year before current fiscal year	0	266
Two years before current fiscal year	245	0
Three years before current fiscal year	0	0
Four years before current fiscal year	446	0
Prior	422	122
Revolving loans amortized cost basis	528	0
Revolving loans converted to term	0	0
Total	1,810	388
Agricultural land, production and other loans to farmers | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	2,554	58
Fiscal year before current fiscal year	48	150
Two years before current fiscal year	800	0
Three years before current fiscal year	682	454
Four years before current fiscal year	34	0
Prior	81	36
Revolving loans amortized cost basis	136	0
Revolving loans converted to term	0	0
Total	4,335	698
Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	338,806	430,923
Current fiscal year, write-offs	0	0
Fiscal year before current fiscal year	225,682	271,917
Fiscal year before current fiscal year, write-offs	0	0
Two years before current fiscal year	152,105	203,672
Two years before current fiscal year, write-offs	0	0
Three years before current fiscal year	47,728	29,218
Three years before current fiscal year, write-offs	0	0
Four years before current fiscal year	6,398	7,723
Four years before current fiscal year, write-offs	0	0
Prior	8,589	2,357
Prior, write-offs	0	0
Revolving loans amortized cost basis	12,836	11,735
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	0	0
Revolving loans converted to term, write-offs	0	0
Total	792,144	957,545
Total, write-offs	0	0
Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	241,622	403,578
Fiscal year before current fiscal year	203,829	267,587
Two years before current fiscal year	114,794	198,350
Three years before current fiscal year	31,864	8,372
Four years before current fiscal year	6,398	7,723
Prior	8,549	2,357
Revolving loans amortized cost basis	12,836	11,735
Revolving loans converted to term	0	0
Total	619,892	899,702
Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	74,879	25,894
Fiscal year before current fiscal year	21,853	0
Two years before current fiscal year	19,019	0
Three years before current fiscal year	15,214	20,846
Four years before current fiscal year	0	0
Prior	40	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total	131,005	46,740
Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	22,305	1,451
Fiscal year before current fiscal year	0	4,330
Two years before current fiscal year	18,292	5,322
Three years before current fiscal year	0	0
Four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total	40,597	11,103
Construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0
Fiscal year before current fiscal year	0
Two years before current fiscal year	0
Three years before current fiscal year	650
Four years before current fiscal year	0
Prior	0
Revolving loans amortized cost basis	0
Revolving loans converted to term	0
Total	650
Commercial real estate, non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	496,934	470,118
Current fiscal year, write-offs	0	0
Fiscal year before current fiscal year	287,464	535,962
Fiscal year before current fiscal year, write-offs	339	66
Two years before current fiscal year	384,409	542,551
Two years before current fiscal year, write-offs	3	0
Three years before current fiscal year	425,920	443,320
Three years before current fiscal year, write-offs	0	0
Four years before current fiscal year	351,266	160,799
Four years before current fiscal year, write-offs	0	0
Prior	308,160	231,061
Prior, write-offs	1	0
Revolving loans amortized cost basis	19,863	17,028
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	0	0
Revolving loans converted to term, write-offs	0	0
Total	2,274,016	2,400,839
Total, write-offs	343	66
Commercial real estate, non-owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	383,279	373,378
Fiscal year before current fiscal year	275,907	504,280
Two years before current fiscal year	342,442	535,327
Three years before current fiscal year	406,289	418,553
Four years before current fiscal year	327,372	141,320
Prior	278,362	200,821
Revolving loans amortized cost basis	19,863	16,744
Revolving loans converted to term	0	0
Total	2,033,514	2,190,423
Commercial real estate, non-owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	79,440	76,382
Fiscal year before current fiscal year	9,051	21,145
Two years before current fiscal year	35,230	7,005
Three years before current fiscal year	12,975	4,531
Four years before current fiscal year	5,287	19,479
Prior	28,200	27,941
Revolving loans amortized cost basis	0	37
Revolving loans converted to term	0	0
Total	170,183	156,520
Commercial real estate, non-owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	34,215	20,358
Fiscal year before current fiscal year	2,506	10,537
Two years before current fiscal year	6,737	219
Three years before current fiscal year	6,656	20,236
Four years before current fiscal year	18,607	0
Prior	1,598	2,299
Revolving loans amortized cost basis	0	247
Revolving loans converted to term	0	0
Total	70,319	53,896
Commercial real estate, owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	209,900	201,554
Current fiscal year, write-offs	0	48
Fiscal year before current fiscal year	160,646	208,567
Fiscal year before current fiscal year, write-offs	0	0
Two years before current fiscal year	175,469	269,848
Two years before current fiscal year, write-offs	0	0
Three years before current fiscal year	238,523	270,527
Three years before current fiscal year, write-offs	0	0
Four years before current fiscal year	208,439	100,388
Four years before current fiscal year, write-offs	9	2
Prior	132,934	83,316
Prior, write-offs	0	0
Revolving loans amortized cost basis	32,033	27,883
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	0	0
Revolving loans converted to term, write-offs	0	0
Total	1,157,944	1,162,083
Total, write-offs	9	50
Commercial real estate, owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	194,703	176,750
Fiscal year before current fiscal year	141,964	199,821
Two years before current fiscal year	164,725	256,346
Three years before current fiscal year	217,319	263,522
Four years before current fiscal year	198,314	99,180
Prior	127,431	77,485
Revolving loans amortized cost basis	31,573	27,369
Revolving loans converted to term	0	0
Total	1,076,029	1,100,473
Commercial real estate, owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,887	6,712
Fiscal year before current fiscal year	11,013	5,034
Two years before current fiscal year	7,555	9,319
Three years before current fiscal year	9,910	2,460
Four years before current fiscal year	8,603	919
Prior	1,951	2,902
Revolving loans amortized cost basis	460	514
Revolving loans converted to term	0	0
Total	41,379	27,860
Commercial real estate, owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	13,310	18,092
Fiscal year before current fiscal year	7,669	3,712
Two years before current fiscal year	3,189	4,183
Three years before current fiscal year	11,294	4,545
Four years before current fiscal year	1,522	289
Prior	3,552	2,929
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total	40,536	33,750
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	223,850	398,334
Current fiscal year, write-offs	0	101
Fiscal year before current fiscal year	417,417	704,355
Fiscal year before current fiscal year, write-offs	173	252
Two years before current fiscal year	687,790	448,226
Two years before current fiscal year, write-offs	779	208
Three years before current fiscal year	405,283	368,420
Three years before current fiscal year, write-offs	136	3
Four years before current fiscal year	330,261	100,585
Four years before current fiscal year, write-offs	20	3
Prior	300,731	263,618
Prior, write-offs	288	94
Revolving loans amortized cost basis	9,384	5,219
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	13	164
Revolving loans converted to term, write-offs	0	0
Total	2,374,729	2,288,921
Total, write-offs	1,396	661
Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	221,016	395,363
Fiscal year before current fiscal year	413,552	695,056
Two years before current fiscal year	672,713	442,495
Three years before current fiscal year	397,192	365,297
Four years before current fiscal year	326,154	98,654
Prior	293,785	254,718
Revolving loans amortized cost basis	8,887	4,988
Revolving loans converted to term	13	83
Total	2,333,312	2,256,654
Residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,528	2,167
Fiscal year before current fiscal year	1,953	5,591
Two years before current fiscal year	6,228	3,202
Three years before current fiscal year	4,102	1,924
Four years before current fiscal year	2,891	1,065
Prior	3,152	4,837
Revolving loans amortized cost basis	150	200
Revolving loans converted to term	0	81
Total	20,004	19,067
Residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	1,306	804
Fiscal year before current fiscal year	1,912	3,708
Two years before current fiscal year	8,849	2,529
Three years before current fiscal year	3,989	1,199
Four years before current fiscal year	1,216	866
Prior	3,794	4,063
Revolving loans amortized cost basis	347	31
Revolving loans converted to term	0	0
Total	21,413	13,200
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	6,887	9,438
Current fiscal year, write-offs	0	69
Fiscal year before current fiscal year	4,354	30,499
Fiscal year before current fiscal year, write-offs	10	213
Two years before current fiscal year	25,757	62,318
Two years before current fiscal year, write-offs	35	224
Three years before current fiscal year	52,413	12,176
Three years before current fiscal year, write-offs	22	149
Four years before current fiscal year	10,783	1,107
Four years before current fiscal year, write-offs	0	193
Prior	4,141	4,000
Prior, write-offs	267	1,596
Revolving loans amortized cost basis	541,944	491,950
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	13,532	6,083
Revolving loans converted to term, write-offs	0	0
Total	659,811	617,571
Total, write-offs	334	2,444
Home equity | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	6,788	9,375
Fiscal year before current fiscal year	4,354	29,784
Two years before current fiscal year	24,810	61,591
Three years before current fiscal year	51,313	11,084
Four years before current fiscal year	10,486	1,092
Prior	3,976	3,875
Revolving loans amortized cost basis	535,132	484,330
Revolving loans converted to term	12,124	5,837
Total	648,983	606,968
Home equity | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	38	0
Fiscal year before current fiscal year	0	715
Two years before current fiscal year	375	0
Three years before current fiscal year	285	1,092
Four years before current fiscal year	297	15
Prior	69	2
Revolving loans amortized cost basis	4,568	5,031
Revolving loans converted to term	442	149
Total	6,074	7,004
Home equity | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	61	63
Fiscal year before current fiscal year	0	0
Two years before current fiscal year	572	727
Three years before current fiscal year	815	0
Four years before current fiscal year	0	0
Prior	96	123
Revolving loans amortized cost basis	2,244	2,589
Revolving loans converted to term	966	97
Total	4,754	3,599
Individuals' loans for household and other personal expenditures
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	40,972	35,965
Current fiscal year, write-offs	208	147
Fiscal year before current fiscal year	22,101	49,547
Fiscal year before current fiscal year, write-offs	920	770
Two years before current fiscal year	31,703	28,525
Two years before current fiscal year, write-offs	523	342
Three years before current fiscal year	10,695	6,795
Three years before current fiscal year, write-offs	184	77
Four years before current fiscal year	2,335	2,071
Four years before current fiscal year, write-offs	47	62
Prior	4,733	5,918
Prior, write-offs	80	156
Revolving loans amortized cost basis	53,308	38,795
Revolving loans amortized cost basis, write-offs	0	0
Revolving loans converted to term	181	772
Revolving loans converted to term, write-offs	0	0
Total	166,028	168,388
Total, write-offs	1,962	1,554
Individuals' loans for household and other personal expenditures | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	40,819	35,781
Fiscal year before current fiscal year	21,867	49,295
Two years before current fiscal year	31,356	28,387
Three years before current fiscal year	10,520	6,726
Four years before current fiscal year	2,276	2,070
Prior	4,693	5,904
Revolving loans amortized cost basis	53,180	38,619
Revolving loans converted to term	180	772
Total	164,891	167,554
Individuals' loans for household and other personal expenditures | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	153	184
Fiscal year before current fiscal year	234	246
Two years before current fiscal year	347	138
Three years before current fiscal year	175	69
Four years before current fiscal year	59	0
Prior	40	14
Revolving loans amortized cost basis	128	176
Revolving loans converted to term	0	0
Total	1,136	827
Individuals' loans for household and other personal expenditures | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Fiscal year before current fiscal year	0	6
Two years before current fiscal year	0	0
Three years before current fiscal year	0	0
Four years before current fiscal year	0	1
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	1	0
Total	1	7
Public finance and other commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	161,072	65,357
Fiscal year before current fiscal year	53,750	208,347
Two years before current fiscal year	203,884	204,863
Three years before current fiscal year	195,066	155,132
Four years before current fiscal year	146,377	91,619
Prior	298,802	229,355
Revolving loans amortized cost basis	132	1,645
Revolving loans converted to term	0	0
Total	1,059,083	956,318
Public finance and other commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	161,072	65,357
Fiscal year before current fiscal year	53,750	208,347
Two years before current fiscal year	203,884	204,863
Three years before current fiscal year	195,066	155,132
Four years before current fiscal year	146,377	91,619
Prior	298,802	229,355
Revolving loans amortized cost basis	132	1,645
Revolving loans converted to term	0	0
Total	$ 1,059,083	$ 956,318

X

- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

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- Definition

Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

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X

- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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