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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Loss Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | $ 112,167 | $ 100,219 |  | $ 105,357 | $ 96,270 | $ 96,270 |
Charge-offs | (7,091) | (6,744) |  | (15,972) | (22,365) |  |
Recoveries | 1,471 | 1,315 |  | 4,660 | 4,267 |  |
Provision/(Benefit) for Credit Losses | 5,500 | 8,002 |  | 18,002 | 25,021 |  |
Balance at End of Period | 112,047 | 102,792 | $ 100,219 | 112,047 | 102,792 | 105,357 | $ 96,270
Accounting Standards Update [Extensible Enumeration] |  |  | Accounting Standards Update 2022-02 [Member] |  |  |  | Accounting Standards Update 2022-02 [Member]
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | (401) | (401) |
Balance at End of Period |  |  | $ 0 |  |  |  | $ (401)
Construction and commercial multifamily | Construction |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 2,776 | 1,553 |  | 2,885 | 1,227 | 1,227 |
Charge-offs | 0 | 0 |  | 0 | (1) | (1) |
Recoveries | 0 | 0 |  | 0 | 0 |  |
Provision/(Benefit) for Credit Losses | 1,175 | 1,949 |  | 1,066 | 2,276 |  |
Balance at End of Period | 3,951 | 3,502 | 1,553 | 3,951 | 3,502 | 2,885 | 1,227
Construction and commercial multifamily | Construction | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | 0 | 0 |
Balance at End of Period |  |  | 0 |  |  |  | 0
Construction and commercial multifamily | Commercial multifamily |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 3,235 | 2,066 |  | 2,475 | 1,810 | 1,810 |
Charge-offs | (1,164) | 0 |  | (1,164) | 0 | 0 |
Recoveries | 0 | 0 |  | 0 | 6 |  |
Provision/(Benefit) for Credit Losses | 1,538 | 339 |  | 2,298 | 589 |  |
Balance at End of Period | 3,609 | 2,405 | 2,066 | 3,609 | 2,405 | 2,475 | 1,810
Construction and commercial multifamily | Commercial multifamily | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | 0 | 0 |
Balance at End of Period |  |  | 0 |  |  |  | 0
Commercial real estate | Commercial real estate owner occupied |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 10,871 | 10,343 |  | 9,443 | 10,739 | 10,739 |
Charge-offs | (22) | (25) |  | (228) | (489) | (489) |
Recoveries | 95 | 116 |  | 203 | 758 |  |
Provision/(Benefit) for Credit Losses | 1,145 | (979) |  | 2,671 | (1,577) |  |
Balance at End of Period | 12,089 | 9,455 | 10,343 | 12,089 | 9,455 | 9,443 | 10,739
Commercial real estate | Commercial real estate owner occupied | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | 24 | 24 |
Balance at End of Period |  |  | 0 |  |  |  | 24
Commercial real estate | Commercial real estate non-owner occupied |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 35,843 | 36,322 |  | 38,221 | 30,724 | 30,724 |
Charge-offs | (36) | (1) |  | (36) | (1) | (65) |
Recoveries | 109 | 20 |  | 215 | 195 |  |
Provision/(Benefit) for Credit Losses | 1,101 | (3,059) |  | (1,383) | 2,364 |  |
Balance at End of Period | 37,017 | 33,282 | 36,322 | 37,017 | 33,282 | 38,221 | 30,724
Commercial real estate | Commercial real estate non-owner occupied | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | 0 | 0 |
Balance at End of Period |  |  | 0 |  |  |  | 0
Commercial and industrial |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 22,843 | 18,741 |  | 18,602 | 18,743 | 18,743 |
Charge-offs | (1,731) | (3,997) |  | (5,144) | (14,625) | (17,872) |
Recoveries | 716 | 617 |  | 1,629 | 1,736 |  |
Provision/(Benefit) for Credit Losses | 1,805 | 3,158 |  | 8,546 | 12,688 |  |
Balance at End of Period | 23,633 | 18,519 | 18,741 | 23,633 | 18,519 | 18,602 | 18,743
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | (23) | (23) |
Balance at End of Period |  |  | 0 |  |  |  | (23)
Residential real estate | Residential real estate |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 22,604 | 18,218 |  | 19,622 | 18,666 | 18,666 |
Charge-offs | 0 | (72) |  | (45) | (313) | (313) |
Recoveries | 283 | 92 |  | 842 | 555 |  |
Provision/(Benefit) for Credit Losses | (974) | 1,766 |  | 1,494 | 1,094 |  |
Balance at End of Period | 21,913 | 20,004 | 18,218 | 21,913 | 20,004 | 19,622 | 18,666
Residential real estate | Residential real estate | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | 2 | 2 |
Balance at End of Period |  |  | 0 |  |  |  | 2
Consumer loans | Home equity |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 2,094 | 2,572 |  | 2,015 | 2,173 | 2,173 |
Charge-offs | 0 | (71) |  | 0 | (88) | (88) |
Recoveries | 3 | 278 |  | 249 | 437 |  |
Provision/(Benefit) for Credit Losses | 331 | (677) |  | 164 | (420) |  |
Balance at End of Period | 2,428 | 2,102 | 2,572 | 2,428 | 2,102 | 2,015 | 2,173
Consumer loans | Home equity | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | 0 |  |  | 0 | 0 |
Balance at End of Period |  |  | 0 |  |  |  | 0
Consumer loans | Consumer other |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period | 11,901 | 10,404 |  | 12,094 | 12,188 | 12,188 |
Charge-offs | (4,138) | (2,578) |  | (9,355) | (6,848) | (10,429) |
Recoveries | 265 | 192 |  | 1,522 | 580 |  |
Provision/(Benefit) for Credit Losses | (621) | 5,505 |  | 3,146 | 8,007 |  |
Balance at End of Period | $ 7,407 | 13,523 | 10,404 | $ 7,407 | 13,523 | 12,094 | 12,188
Consumer loans | Consumer other | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |
Balance at Beginning of Period |  | $ 0 |  |  | $ (404) | $ (404) |
Balance at End of Period |  |  | $ 0 |  |  |  | $ (404)

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