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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Risk Grading of Loan Portfolio by Loan Class (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | $ 2,236,647 | $ 2,870,871
Current fiscal year, charge-offs | 1,308 | 14,338
Fiscal year before current fiscal year | 1,944,861 | 2,546,512
Fiscal year before current fiscal year, charge-offs | 38,737 | 4,012
Two years before current fiscal year | 2,049,586 | 2,063,941
Two years before current fiscal year, charge-offs | 1,330 | 1,350
Three years before current fiscal year | 1,676,529 | 1,410,944
Three years before current fiscal year, charge-offs | 8,872 | 5,894
Four years before current fiscal year | 1,206,739 | 529,690
Four years before current fiscal year, charge-offs | 572 | 338
Prior | 1,206,911 | 892,018
Prior, charge-offs | 838 | 2,107
Revolving loans amortized cost basis | 2,316,471 | 2,164,828
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 9,064 | 7,223
Revolving loans converted to term, charge-offs | 0 | 0
Total | 12,646,808 | 12,486,027
Total, charge-offs | 51,657 | 28,039
Commercial and industrial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 1,153,289 | 1,223,491
Current fiscal year, charge-offs | 1,178 | 13,973
Fiscal year before current fiscal year | 668,386 | 498,757
Fiscal year before current fiscal year, charge-offs | 37,655 | 2,711
Two years before current fiscal year | 292,762 | 272,427
Two years before current fiscal year, charge-offs | 242 | 576
Three years before current fiscal year | 190,009 | 93,854
Three years before current fiscal year, charge-offs | 8,577 | 5,665
Four years before current fiscal year | 67,109 | 52,403
Four years before current fiscal year, charge-offs | 498 | 78
Prior | 55,389 | 46,773
Prior, charge-offs | 236 | 261
Revolving loans amortized cost basis | 1,613,582 | 1,483,039
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 691 | 204
Revolving loans converted to term, charge-offs | 0 | 0
Total | 4,041,217 | 3,670,948
Total, charge-offs | 48,386 | 23,264
Commercial and industrial loans | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 1,110,731 | 1,175,967
Fiscal year before current fiscal year | 625,113 | 474,601
Two years before current fiscal year | 259,418 | 253,148
Three years before current fiscal year | 180,272 | 86,226
Four years before current fiscal year | 62,723 | 47,910
Prior | 53,350 | 45,020
Revolving loans amortized cost basis | 1,495,641 | 1,393,756
Revolving loans converted to term | 136 | 60
Total | 3,787,384 | 3,476,688
Commercial and industrial loans | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 14,480 | 34,356
Fiscal year before current fiscal year | 9,872 | 3,911
Two years before current fiscal year | 8,979 | 1,546
Three years before current fiscal year | 2,730 | 5,149
Four years before current fiscal year | 2,731 | 2,986
Prior | 369 | 241
Revolving loans amortized cost basis | 45,459 | 45,994
Revolving loans converted to term | 0 | 0
Total | 84,620 | 94,183
Commercial and industrial loans | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 28,078 | 12,311
Fiscal year before current fiscal year | 32,296 | 20,245
Two years before current fiscal year | 24,365 | 17,733
Three years before current fiscal year | 7,007 | 2,479
Four years before current fiscal year | 1,655 | 1,507
Prior | 1,670 | 1,512
Revolving loans amortized cost basis | 72,482 | 40,449
Revolving loans converted to term | 555 | 144
Total | 168,108 | 96,380
Commercial and industrial loans | Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 857
Fiscal year before current fiscal year | 1,105 | 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 | 1,105 | 3,697
Agricultural land, production and other loans to farmers |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 24,308 | 35,691
Current fiscal year, charge-offs |  | 0
Fiscal year before current fiscal year | 24,089 | 38,561
Fiscal year before current fiscal year, charge-offs |  | 0
Two years before current fiscal year | 35,090 | 31,511
Two years before current fiscal year, charge-offs |  | 0
Three years before current fiscal year | 28,568 | 31,502
Three years before current fiscal year, charge-offs |  | 0
Four years before current fiscal year | 28,766 | 12,995
Four years before current fiscal year, charge-offs |  | 0
Prior | 32,975 | 25,620
Prior, charge-offs |  | 0
Revolving loans amortized cost basis | 64,947 | 87,534
Revolving loans amortized cost basis, charge-offs |  | 0
Revolving loans converted to term | 0 | 0
Revolving loans converted to term, charge-offs |  | 0
Total | 238,743 | 263,414
Total, charge-offs |  | 0
Agricultural land, production and other loans to farmers | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 23,646 | 35,633
Fiscal year before current fiscal year | 24,039 | 38,145
Two years before current fiscal year | 33,909 | 31,511
Three years before current fiscal year | 27,872 | 31,048
Four years before current fiscal year | 28,250 | 12,995
Prior | 32,445 | 25,462
Revolving loans amortized cost basis | 63,526 | 87,534
Revolving loans converted to term | 0 | 0
Total | 233,687 | 262,328
Agricultural land, production and other loans to farmers | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 171 | 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 | 0 | 0
Prior | 444 | 122
Revolving loans amortized cost basis | 548 | 0
Revolving loans converted to term | 0 | 0
Total | 1,408 | 388
Agricultural land, production and other loans to farmers | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 491 | 58
Fiscal year before current fiscal year | 50 | 150
Two years before current fiscal year | 936 | 0
Three years before current fiscal year | 696 | 454
Four years before current fiscal year | 516 | 0
Prior | 86 | 36
Revolving loans amortized cost basis | 873 | 0
Revolving loans converted to term | 0 | 0
Total | 3,648 | 698
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 244,050 | 430,923
Current fiscal year, charge-offs |  | 0
Fiscal year before current fiscal year | 254,267 | 271,917
Fiscal year before current fiscal year, charge-offs |  | 0
Two years before current fiscal year | 201,097 | 203,672
Two years before current fiscal year, charge-offs |  | 0
Three years before current fiscal year | 87,087 | 29,218
Three years before current fiscal year, charge-offs |  | 0
Four years before current fiscal year | 6,518 | 7,723
Four years before current fiscal year, charge-offs |  | 0
Prior | 8,857 | 2,357
Prior, charge-offs |  | 0
Revolving loans amortized cost basis | 12,828 | 11,735
Revolving loans amortized cost basis, charge-offs |  | 0
Revolving loans converted to term | 0 | 0
Revolving loans converted to term, charge-offs |  | 0
Total | 814,704 | 957,545
Total, charge-offs |  | 0
Construction | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 186,900 | 403,578
Fiscal year before current fiscal year | 227,462 | 267,587
Two years before current fiscal year | 174,201 | 198,350
Three years before current fiscal year | 73,746 | 8,372
Four years before current fiscal year | 6,518 | 7,723
Prior | 8,851 | 2,357
Revolving loans amortized cost basis | 12,828 | 11,735
Revolving loans converted to term | 0 | 0
Total | 690,506 | 899,702
Construction | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 35,150 | 25,894
Fiscal year before current fiscal year | 26,805 | 0
Two years before current fiscal year | 18,197 | 0
Three years before current fiscal year | 13,341 | 20,846
Four years before current fiscal year | 0 | 0
Prior | 6 | 0
Revolving loans amortized cost basis | 0 | 0
Revolving loans converted to term | 0 | 0
Total | 93,499 | 46,740
Construction | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 22,000 | 1,451
Fiscal year before current fiscal year | 0 | 4,330
Two years before current fiscal year | 8,699 | 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 | 30,699 | 11,103
Commercial real estate, non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 403,251 | 470,118
Current fiscal year, charge-offs | 0 | 0
Fiscal year before current fiscal year | 305,444 | 535,962
Fiscal year before current fiscal year, charge-offs | 339 | 66
Two years before current fiscal year | 374,640 | 542,551
Two years before current fiscal year, charge-offs | 3 | 0
Three years before current fiscal year | 443,864 | 443,320
Three years before current fiscal year, charge-offs | 0 | 0
Four years before current fiscal year | 372,634 | 160,799
Four years before current fiscal year, charge-offs | 0 | 0
Prior | 329,837 | 231,061
Prior, charge-offs | 0 | 0
Revolving loans amortized cost basis | 21,681 | 17,028
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 0 | 0
Revolving loans converted to term, charge-offs | 0 | 0
Total | 2,251,351 | 2,400,839
Total, charge-offs | 342 | 66
Commercial real estate, non-owner occupied | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 278,958 | 373,378
Fiscal year before current fiscal year | 280,167 | 504,280
Two years before current fiscal year | 346,311 | 535,327
Three years before current fiscal year | 413,970 | 418,553
Four years before current fiscal year | 351,260 | 141,320
Prior | 299,771 | 200,821
Revolving loans amortized cost basis | 21,681 | 16,744
Revolving loans converted to term | 0 | 0
Total | 1,992,118 | 2,190,423
Commercial real estate, non-owner occupied | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 81,543 | 76,382
Fiscal year before current fiscal year | 19,499 | 21,145
Two years before current fiscal year | 19,347 | 7,005
Three years before current fiscal year | 23,624 | 4,531
Four years before current fiscal year | 1,768 | 19,479
Prior | 28,452 | 27,941
Revolving loans amortized cost basis | 0 | 37
Revolving loans converted to term | 0 | 0
Total | 174,233 | 156,520
Commercial real estate, non-owner occupied | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 31,922 | 20,358
Fiscal year before current fiscal year | 5,778 | 10,537
Two years before current fiscal year | 8,982 | 219
Three years before current fiscal year | 6,270 | 20,236
Four years before current fiscal year | 19,606 | 0
Prior | 1,614 | 2,299
Revolving loans amortized cost basis | 0 | 247
Revolving loans converted to term | 0 | 0
Total | 74,172 | 53,896
Commercial real estate, non-owner occupied | Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 10,828 |
Fiscal year before current fiscal year | 0 |
Two years before current fiscal year | 0 |
Three years before current fiscal year | 0 |
Four years before current fiscal year | 0 |
Prior | 0 |
Revolving loans amortized cost basis | 0 |
Revolving loans converted to term | 0 |
Total | 10,828 |
Commercial real estate, owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 127,141 | 201,554
Current fiscal year, charge-offs | 0 | 48
Fiscal year before current fiscal year | 182,523 | 208,567
Fiscal year before current fiscal year, charge-offs | 0 | 0
Two years before current fiscal year | 187,332 | 269,848
Two years before current fiscal year, charge-offs | 0 | 0
Three years before current fiscal year | 246,262 | 270,527
Three years before current fiscal year, charge-offs | 0 | 0
Four years before current fiscal year | 222,657 | 100,388
Four years before current fiscal year, charge-offs | 9 | 2
Prior | 152,608 | 83,316
Prior, charge-offs | 0 | 0
Revolving loans amortized cost basis | 34,228 | 27,883
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 0 | 0
Revolving loans converted to term, charge-offs | 0 | 0
Total | 1,152,751 | 1,162,083
Total, charge-offs | 9 | 50
Commercial real estate, owner occupied | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 118,117 | 176,750
Fiscal year before current fiscal year | 167,922 | 199,821
Two years before current fiscal year | 173,512 | 256,346
Three years before current fiscal year | 230,821 | 263,522
Four years before current fiscal year | 214,975 | 99,180
Prior | 144,123 | 77,485
Revolving loans amortized cost basis | 33,613 | 27,369
Revolving loans converted to term | 0 | 0
Total | 1,083,083 | 1,100,473
Commercial real estate, owner occupied | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 2,220 | 6,712
Fiscal year before current fiscal year | 2,385 | 5,034
Two years before current fiscal year | 8,616 | 9,319
Three years before current fiscal year | 6,545 | 2,460
Four years before current fiscal year | 4,935 | 919
Prior | 1,402 | 2,902
Revolving loans amortized cost basis | 460 | 514
Revolving loans converted to term | 0 | 0
Total | 26,563 | 27,860
Commercial real estate, owner occupied | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 6,804 | 18,092
Fiscal year before current fiscal year | 12,216 | 3,712
Two years before current fiscal year | 5,204 | 4,183
Three years before current fiscal year | 8,896 | 4,545
Four years before current fiscal year | 2,747 | 289
Prior | 7,083 | 2,929
Revolving loans amortized cost basis | 155 | 0
Revolving loans converted to term | 0 | 0
Total | 43,105 | 33,750
Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 168,430 | 398,334
Current fiscal year, charge-offs | 0 | 101
Fiscal year before current fiscal year | 424,733 | 704,355
Fiscal year before current fiscal year, charge-offs | 124 | 252
Two years before current fiscal year | 692,860 | 448,226
Two years before current fiscal year, charge-offs | 653 | 208
Three years before current fiscal year | 415,668 | 368,420
Three years before current fiscal year, charge-offs | 123 | 3
Four years before current fiscal year | 342,646 | 100,585
Four years before current fiscal year, charge-offs | 21 | 3
Prior | 316,151 | 263,618
Prior, charge-offs | 288 | 94
Revolving loans amortized cost basis | 6,442 | 5,219
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 13 | 164
Revolving loans converted to term, charge-offs | 0 | 0
Total | 2,366,943 | 2,288,921
Total, charge-offs | 1,209 | 661
Residential | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 166,807 | 395,363
Fiscal year before current fiscal year | 421,280 | 695,056
Two years before current fiscal year | 680,588 | 442,495
Three years before current fiscal year | 408,017 | 365,297
Four years before current fiscal year | 339,835 | 98,654
Prior | 308,575 | 254,718
Revolving loans amortized cost basis | 6,117 | 4,988
Revolving loans converted to term | 13 | 83
Total | 2,331,232 | 2,256,654
Residential | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 1,095 | 2,167
Fiscal year before current fiscal year | 1,975 | 5,591
Two years before current fiscal year | 5,436 | 3,202
Three years before current fiscal year | 3,425 | 1,924
Four years before current fiscal year | 1,745 | 1,065
Prior | 3,585 | 4,837
Revolving loans amortized cost basis | 0 | 200
Revolving loans converted to term | 0 | 81
Total | 17,261 | 19,067
Residential | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 528 | 804
Fiscal year before current fiscal year | 1,478 | 3,708
Two years before current fiscal year | 6,836 | 2,529
Three years before current fiscal year | 4,226 | 1,199
Four years before current fiscal year | 1,066 | 866
Prior | 3,991 | 4,063
Revolving loans amortized cost basis | 325 | 31
Revolving loans converted to term | 0 | 0
Total | 18,450 | 13,200
Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 6,301 | 9,438
Current fiscal year, charge-offs | 0 | 69
Fiscal year before current fiscal year | 6,674 | 30,499
Fiscal year before current fiscal year, charge-offs | 10 | 213
Two years before current fiscal year | 26,315 | 62,318
Two years before current fiscal year, charge-offs | 35 | 224
Three years before current fiscal year | 55,167 | 12,176
Three years before current fiscal year, charge-offs | 23 | 149
Four years before current fiscal year | 11,864 | 1,107
Four years before current fiscal year, charge-offs | 0 | 193
Prior | 4,585 | 4,000
Prior, charge-offs | 264 | 1,596
Revolving loans amortized cost basis | 522,291 | 491,950
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 7,991 | 6,083
Revolving loans converted to term, charge-offs | 0 | 0
Total | 641,188 | 617,571
Total, charge-offs | 332 | 2,444
Home equity | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 6,239 | 9,375
Fiscal year before current fiscal year | 6,674 | 29,784
Two years before current fiscal year | 25,743 | 61,591
Three years before current fiscal year | 54,185 | 11,084
Four years before current fiscal year | 11,864 | 1,092
Prior | 4,346 | 3,875
Revolving loans amortized cost basis | 516,564 | 484,330
Revolving loans converted to term | 6,766 | 5,837
Total | 632,381 | 606,968
Home equity | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 715
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 421 | 1,092
Four years before current fiscal year | 0 | 15
Prior | 33 | 2
Revolving loans amortized cost basis | 3,772 | 5,031
Revolving loans converted to term | 593 | 149
Total | 4,819 | 7,004
Home equity | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 62 | 63
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 572 | 727
Three years before current fiscal year | 561 | 0
Four years before current fiscal year | 0 | 0
Prior | 206 | 123
Revolving loans amortized cost basis | 1,955 | 2,589
Revolving loans converted to term | 632 | 97
Total | 3,988 | 3,599
Individuals' loans for household and other personal expenditures |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 37,648 | 35,965
Current fiscal year, charge-offs | 130 | 147
Fiscal year before current fiscal year | 24,957 | 49,547
Fiscal year before current fiscal year, charge-offs | 609 | 770
Two years before current fiscal year | 34,620 | 28,525
Two years before current fiscal year, charge-offs | 397 | 342
Three years before current fiscal year | 12,585 | 6,795
Three years before current fiscal year, charge-offs | 149 | 77
Four years before current fiscal year | 3,177 | 2,071
Four years before current fiscal year, charge-offs | 44 | 62
Prior | 5,225 | 5,918
Prior, charge-offs | 50 | 156
Revolving loans amortized cost basis | 39,899 | 38,795
Revolving loans amortized cost basis, charge-offs | 0 | 0
Revolving loans converted to term | 369 | 772
Revolving loans converted to term, charge-offs | 0 | 0
Total | 158,480 | 168,388
Total, charge-offs | 1,379 | 1,554
Individuals' loans for household and other personal expenditures | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 37,606 | 35,781
Fiscal year before current fiscal year | 24,496 | 49,295
Two years before current fiscal year | 34,052 | 28,387
Three years before current fiscal year | 11,078 | 6,726
Four years before current fiscal year | 3,097 | 2,070
Prior | 5,215 | 5,904
Revolving loans amortized cost basis | 39,613 | 38,619
Revolving loans converted to term | 369 | 772
Total | 155,526 | 167,554
Individuals' loans for household and other personal expenditures | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 42 | 184
Fiscal year before current fiscal year | 461 | 246
Two years before current fiscal year | 568 | 138
Three years before current fiscal year | 1,507 | 69
Four years before current fiscal year | 80 | 0
Prior | 8 | 14
Revolving loans amortized cost basis | 286 | 176
Revolving loans converted to term | 0 | 0
Total | 2,952 | 827
Individuals' loans for household and other personal expenditures | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [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 | 2 | 0
Revolving loans amortized cost basis | 0 | 0
Revolving loans converted to term | 0 | 0
Total | 2 | 7
Public finance and other commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 72,229 | 65,357
Fiscal year before current fiscal year | 53,788 | 208,347
Two years before current fiscal year | 204,870 | 204,863
Three years before current fiscal year | 197,319 | 155,132
Four years before current fiscal year | 151,368 | 91,619
Prior | 301,284 | 229,355
Revolving loans amortized cost basis | 573 | 1,645
Revolving loans converted to term | 0 | 0
Total | 981,431 | 956,318
Public finance and other commercial loans | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 72,229 | 65,357
Fiscal year before current fiscal year | 53,788 | 208,347
Two years before current fiscal year | 204,870 | 204,863
Three years before current fiscal year | 197,319 | 155,132
Four years before current fiscal year | 151,368 | 91,619
Prior | 301,284 | 229,355
Revolving loans amortized cost basis | 573 | 1,645
Revolving loans converted to term | 0 | 0
Total | $ 981,431 | $ 956,318

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