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LOANS AND LEASES - Loan Delinquency, including Nonaccrual Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | $ 115,231 | $ 94,378
Current | 13,379,610 | 13,329,692
Gross loans and leases, excluding accrued interest | 13,494,841 | 13,424,070
> 90 days past due and still accruing | 1,366 | 411
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 26,479 | 25,498
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 19,562 | 12,104
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 69,190 | 56,776
Commercial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 26,431 | 14,899
Current | 4,667,355 | 4,617,342
Gross loans and leases, excluding accrued interest | 4,693,786 | 4,632,241
> 90 days past due and still accruing | 552 | 0
Commercial | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 13,298 | 7,894
Commercial | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 2,709 | 3,176
Commercial | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 10,424 | 3,829
Lease financing |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 10,926 | 6,255
Current | 638,719 | 632,272
Gross loans and leases, excluding accrued interest | 649,645 | 638,527
> 90 days past due and still accruing | 316 | 0
Lease financing | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 733 | 1,884
Lease financing | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 5,457 | 283
Lease financing | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 4,736 | 4,088
Construction real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 0 | 1,120
Current | 591,080 | 676,219
Gross loans and leases, excluding accrued interest | 591,080 | 677,339
> 90 days past due and still accruing | 0 | 0
Construction real estate | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 0 | 0
Construction real estate | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 0 | 0
Construction real estate | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 0 | 1,120
Commercial real estate - investor |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 41,599 | 43,426
Current | 3,276,702 | 3,203,463
Gross loans and leases, excluding accrued interest | 3,318,301 | 3,246,889
> 90 days past due and still accruing | 0 | 0
Commercial real estate - investor | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 546 | 3,540
Commercial real estate - investor | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 0 | 3,613
Commercial real estate - investor | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 41,053 | 36,273
Commercial real estate-owner |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 16,944 | 7,502
Current | 1,138,223 | 1,130,165
Gross loans and leases, excluding accrued interest | 1,155,167 | 1,137,667
> 90 days past due and still accruing | 0 | 0
Commercial real estate-owner | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 3,699 | 1,081
Commercial real estate-owner | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 7,779 | 2,985
Commercial real estate-owner | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 5,466 | 3,436
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 8,512 | 12,561
Current | 1,822,826 | 1,819,623
Gross loans and leases, excluding accrued interest | 1,831,338 | 1,832,184
> 90 days past due and still accruing | 0 | 0
Residential real estate | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 3,068 | 6,338
Residential real estate | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 1,154 | 248
Residential real estate | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 4,290 | 5,975
Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 6,978 | 5,255
Current | 1,019,861 | 999,949
Gross loans and leases, excluding accrued interest | 1,026,839 | 1,005,204
> 90 days past due and still accruing | 0 | 0
Home equity | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 3,209 | 2,966
Home equity | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 1,600 | 1,065
Home equity | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 2,169 | 1,224
Installment |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 2,397 | 1,881
Current | 159,917 | 186,813
Gross loans and leases, excluding accrued interest | 162,314 | 188,694
> 90 days past due and still accruing | 0 | 65
Installment | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 1,351 | 935
Installment | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 494 | 462
Installment | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 552 | 484
Credit card |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 1,444 | 1,479
Current | 64,927 | 63,846
Gross loans and leases, excluding accrued interest | 66,371 | 65,325
> 90 days past due and still accruing | 498 | 346
Credit card | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 575 | 860
Credit card | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | 369 | 272
Credit card | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Noncurrent | $ 500 | $ 347

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