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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loan Summary (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Loans receivable, net |  |  |  |  |  |
Loans | $ 10,251,674 |  | $ 9,704,598 |  |  |
Allowance for credit losses | (76,167) |  | (66,669) | $ (64,945) |  |
Loans, net of allowance for credit losses | 10,175,507 |  | 9,637,929 |  |  |
CRE - multifamily |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 694,847 |  | 619,794 |  |  |
CRE - owner occupied |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 870,165 |  | 752,774 |  |  |
CRE - non-owner occupied |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 1,731,850 |  | 1,711,198 |  |  |
Commercial & industrial and other business loans |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 1,094,767 |  | 1,000,630 |  |  |
Consumer mortgage |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 3,427,317 |  | 3,285,018 |  |  |
Consumer indirect |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 1,780,586 |  | 1,703,440 |  |  |
Consumer direct |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 191,178 |  | 185,229 |  |  |
Home equity |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 460,964 |  | 446,515 |  |  |
Commercial Portfolio Segment | CRE - multifamily |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 694,847 |  | 619,794 |  |  |
Commercial Portfolio Segment | CRE - owner occupied |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 870,165 |  | 752,774 |  |  |
Commercial Portfolio Segment | CRE - non-owner occupied |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 1,731,850 |  | 1,711,198 |  |  |
Commercial Portfolio Segment | Commercial & industrial and other business loans |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 1,094,767 |  | 1,000,630 |  |  |
Residential Portfolio Segment | Consumer mortgage |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 3,427,317 |  | 3,285,018 |  |  |
Allowance for credit losses | (14,794) | $ (14,303) | (15,333) | (14,971) | $ (14,553) | $ (14,343)
Residential Portfolio Segment | Home equity |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Allowance for credit losses | (1,566) | (1,519) | (1,628) | (1,594) | (1,600) | (1,594)
Consumer Portfolio Segment | Consumer indirect |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 1,780,586 |  | 1,703,440 |  |  |
Allowance for credit losses | (21,086) | (20,124) | (18,585) | (18,290) | (17,808) | (17,852)
Consumer Portfolio Segment | Consumer direct |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | 191,178 |  | 185,229 |  |  |
Allowance for credit losses | (3,972) | $ (3,368) | (3,269) | $ (3,046) | $ (3,032) | $ (2,973)
Consumer Portfolio Segment | Home equity |  |  |  |  |  |
Loans receivable, net |  |  |  |  |  |
Loans | $ 460,964 |  | $ 446,515 |  |  |

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