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LOANS AND CREDIT QUALITY - Amortized Cost in Loans Based Upon Year of Origination and Risk Rating (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Total loan receivables before allowance for credit losses | $ 13,852,209 |  | $ 14,176,936
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Total | 7,205 | $ 12,217 |
Commercial and industrial |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 3,767 |  | 23,025
Financing receivable, year two | 22,248 |  | 41,165
Financing receivable, year three | 57,022 |  | 52,639
Financing receivable, year four | 51,375 |  | 48,386
Financing receivable, year five | 45,275 |  | 20,476
Financing receivable, more than five years | 118,489 |  | 95,659
Revolving Loans Amortized Cost Basis | 161,228 |  | 200,595
Revolving Loans Converted to Term | 677 |  | 225
Total loan receivables before allowance for credit losses | 460,081 |  | 482,170
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Financing receivable, year one, Gross charge-offs | 0 |  | 40
Financing receivable, year two, Gross charge-offs | 0 |  | 75
Financing receivable, year three, Gross charge-offs | 0 |  | 47
Financing receivable, year four, Gross charge-offs | 0 |  | 6,772
Financing receivable, year five, Gross charge-offs | 0 |  | 230
Financing receivable, more than five years, Gross charge-offs | 6 |  | 19
Revolving Loans Amortized Cost Basis | 125 |  | 1,215
Revolving Loans Converted to Term | 0 |  | 0
Total | 131 | 117 | 8,398
Commercial and industrial | Pass |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 3,767 |  | 22,961
Financing receivable, year two | 22,096 |  | 40,427
Financing receivable, year three | 56,294 |  | 52,574
Financing receivable, year four | 51,301 |  | 24,657
Financing receivable, year five | 22,308 |  | 19,914
Financing receivable, more than five years | 105,591 |  | 78,344
Revolving Loans Amortized Cost Basis | 157,335 |  | 200,344
Revolving Loans Converted to Term | 661 |  | 225
Total loan receivables before allowance for credit losses | 419,353 |  | 439,446
Commercial and industrial | Special mention |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 104
Financing receivable, year three | 94 |  | 0
Financing receivable, year four | 0 |  | 472
Financing receivable, year five | 450 |  | 162
Financing receivable, more than five years | 1,459 |  | 2,828
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 2,003 |  | 3,566
Commercial and industrial | Substandard |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 64
Financing receivable, year two | 152 |  | 634
Financing receivable, year three | 634 |  | 65
Financing receivable, year four | 74 |  | 23,257
Financing receivable, year five | 22,517 |  | 400
Financing receivable, more than five years | 11,439 |  | 14,487
Revolving Loans Amortized Cost Basis | 3,893 |  | 251
Revolving Loans Converted to Term | 16 |  | 0
Total loan receivables before allowance for credit losses | 38,725 |  | 39,158
Commercial and industrial | Doubtful |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 0 |  | 0
Commercial real estate |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Total loan receivables before allowance for credit losses | 5,291,597 |  | 5,355,252
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Total | 0 | $ 0 |
Commercial real estate | Multifamily |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 18,046 |  | 59,536
Financing receivable, year two | 59,406 |  | 177,297
Financing receivable, year three | 171,314 |  | 464,969
Financing receivable, year four | 463,955 |  | 2,324,644
Financing receivable, year five | 2,295,488 |  | 1,223,707
Financing receivable, more than five years | 2,263,237 |  | 1,086,728
Revolving Loans Amortized Cost Basis | 20,151 |  | 18,160
Revolving Loans Converted to Term | 0 |  | 211
Total loan receivables before allowance for credit losses | 5,291,597 |  | 5,355,252
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Financing receivable, year one, Gross charge-offs | 0 |  | 0
Financing receivable, year two, Gross charge-offs | 0 |  | 0
Financing receivable, year three, Gross charge-offs | 0 |  | 0
Financing receivable, year four, Gross charge-offs | 0 |  | 0
Financing receivable, year five, Gross charge-offs | 0 |  | 0
Financing receivable, more than five years, Gross charge-offs | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total | 0 |  | 0
Commercial real estate | Multifamily | Pass |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 18,046 |  | 59,536
Financing receivable, year two | 59,406 |  | 177,297
Financing receivable, year three | 171,314 |  | 458,411
Financing receivable, year four | 457,394 |  | 2,224,002
Financing receivable, year five | 2,199,195 |  | 1,177,242
Financing receivable, more than five years | 2,179,991 |  | 1,031,448
Revolving Loans Amortized Cost Basis | 20,151 |  | 18,160
Revolving Loans Converted to Term | 0 |  | 211
Total loan receivables before allowance for credit losses | 5,105,497 |  | 5,146,307
Commercial real estate | Multifamily | Special mention |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 32,156
Financing receivable, year five | 18,312 |  | 22,062
Financing receivable, more than five years | 45,657 |  | 35,772
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 63,969 |  | 89,990
Commercial real estate | Multifamily | Substandard |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 6,558
Financing receivable, year four | 6,561 |  | 68,486
Financing receivable, year five | 77,981 |  | 24,403
Financing receivable, more than five years | 37,589 |  | 19,508
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 122,131 |  | 118,955
Commercial real estate | Multifamily | Doubtful |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 0 |  | 0
Commercial real estate | Non-owner occupied |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 7,032
Financing receivable, year two | 11,036 |  | 13,753
Financing receivable, year three | 13,692 |  | 31,688
Financing receivable, year four | 32,879 |  | 371,096
Financing receivable, year five | 370,195 |  | 138,150
Financing receivable, more than five years | 1,274,509 |  | 1,171,642
Revolving Loans Amortized Cost Basis | 9,300 |  | 6,659
Revolving Loans Converted to Term | 0 |  | 257
Total loan receivables before allowance for credit losses | 1,711,611 |  | 1,740,277
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Financing receivable, year one, Gross charge-offs | 0 |  | 0
Financing receivable, year two, Gross charge-offs | 0 |  | 0
Financing receivable, year three, Gross charge-offs | 0 |  | 0
Financing receivable, year four, Gross charge-offs | 0 |  | 0
Financing receivable, year five, Gross charge-offs | 0 |  | 0
Financing receivable, more than five years, Gross charge-offs | 0 |  | 428
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total | 0 |  | 428
Commercial real estate | Non-owner occupied | Pass |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 7,032
Financing receivable, year two | 11,036 |  | 13,753
Financing receivable, year three | 13,692 |  | 31,688
Financing receivable, year four | 32,879 |  | 371,096
Financing receivable, year five | 370,195 |  | 138,150
Financing receivable, more than five years | 1,149,482 |  | 1,057,437
Revolving Loans Amortized Cost Basis | 9,300 |  | 6,659
Revolving Loans Converted to Term | 0 |  | 257
Total loan receivables before allowance for credit losses | 1,586,584 |  | 1,626,072
Commercial real estate | Non-owner occupied | Special mention |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 37,148 |  | 32,308
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 37,148 |  | 32,308
Commercial real estate | Non-owner occupied | Substandard |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 87,879 |  | 81,897
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 87,879 |  | 81,897
Commercial real estate | Non-owner occupied | Doubtful |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 0 |  | 0
Commercial real estate | Owner occupied |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 1,279 |  | 30,541
Financing receivable, year two | 26,298 |  | 12,420
Financing receivable, year three | 12,330 |  | 27,707
Financing receivable, year four | 23,062 |  | 118,543
Financing receivable, year five | 114,144 |  | 83,847
Financing receivable, more than five years | 398,092 |  | 406,733
Revolving Loans Amortized Cost Basis | 11,493 |  | 9,045
Revolving Loans Converted to Term | 0 |  | 243
Total loan receivables before allowance for credit losses | 586,698 |  | 689,079
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Financing receivable, year one, Gross charge-offs | 0 |  | 0
Financing receivable, year two, Gross charge-offs | 0 |  | 0
Financing receivable, year three, Gross charge-offs | 0 |  | 0
Financing receivable, year four, Gross charge-offs | 0 |  | 0
Financing receivable, year five, Gross charge-offs | 0 |  |
Financing receivable, more than five years, Gross charge-offs | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total | 0 |  | 0
Commercial real estate | Owner occupied | Pass |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 1,279 |  | 30,541
Financing receivable, year two | 26,298 |  | 12,420
Financing receivable, year three | 12,330 |  | 27,707
Financing receivable, year four | 23,062 |  | 108,047
Financing receivable, year five | 97,984 |  | 73,141
Financing receivable, more than five years | 357,118 |  | 371,660
Revolving Loans Amortized Cost Basis | 11,493 |  | 9,045
Revolving Loans Converted to Term | 0 |  | 243
Total loan receivables before allowance for credit losses | 529,564 |  | 632,804
Commercial real estate | Owner occupied | Special mention |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 1,660
Financing receivable, year five | 7,362 |  | 6,954
Financing receivable, more than five years | 34,267 |  | 28,003
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 41,629 |  | 36,617
Commercial real estate | Owner occupied | Substandard |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 8,836
Financing receivable, year five | 8,798 |  | 3,752
Financing receivable, more than five years | 6,707 |  | 7,070
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 15,505 |  | 19,658
Commercial real estate | Owner occupied | Doubtful |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 0 |  | 0
Commercial real estate | Construction and land development |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 20,992 |  | 272,783
Financing receivable, year two | 209,571 |  | 128,650
Financing receivable, year three | 86,476 |  | 59,371
Financing receivable, year four | 55,705 |  | 13,377
Financing receivable, year five | 8,724 |  | 3,112
Financing receivable, more than five years | 17,708 |  | 15,899
Revolving Loans Amortized Cost Basis | 370 |  | 200
Revolving Loans Converted to Term | 0 |  | 600
Total loan receivables before allowance for credit losses | 399,546 |  | 493,992
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Financing receivable, year one, Gross charge-offs | 0 |  | 0
Financing receivable, year two, Gross charge-offs | 0 |  | 0
Financing receivable, year three, Gross charge-offs | 0 |  | 0
Financing receivable, year four, Gross charge-offs | 0 |  | 0
Financing receivable, year five, Gross charge-offs | 0 |  | 0
Financing receivable, more than five years, Gross charge-offs | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total | 0 |  | 0
Commercial real estate | Construction and land development | Pass |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 20,992 |  | 272,783
Financing receivable, year two | 209,571 |  | 128,650
Financing receivable, year three | 86,476 |  | 59,371
Financing receivable, year four | 55,705 |  | 13,377
Financing receivable, year five | 8,724 |  | 3,112
Financing receivable, more than five years | 14,483 |  | 12,937
Revolving Loans Amortized Cost Basis | 370 |  | 200
Revolving Loans Converted to Term | 0 |  | 600
Total loan receivables before allowance for credit losses | 396,321 |  | 491,030
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |
Financing receivable, year five, Gross charge-offs |  |  | 0
Commercial real estate | Construction and land development | Special mention |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 0 |  | 0
Commercial real estate | Construction and land development | Substandard |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 3,225 |  | 2,962
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | 3,225 |  | 2,962
Commercial real estate | Construction and land development | Doubtful |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |
Financing receivable, year one | 0 |  | 0
Financing receivable, year two | 0 |  | 0
Financing receivable, year three | 0 |  | 0
Financing receivable, year four | 0 |  | 0
Financing receivable, year five | 0 |  | 0
Financing receivable, more than five years | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loan receivables before allowance for credit losses | $ 0 |  | $ 0

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