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ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |  |  |
Accrued interest receivable | $ 34,120,000 |  | $ 34,120,000 |  |  | $ 29,898,000 |  |
Individually evaluated include Nonaccrual loans | 84,100,000 |  | 84,100,000 |  |  | 99,800,000 |  |
Individually evaluated non accrual loans performing modified loans | 0 |  | 0 |  |  |  |  |
Allowance allocated to modified loans | 333,000 |  | 333,000 |  |  |  |  |
Charge-offs | 18,027,000 | $ 47,000 | 20,407,000 | $ 5,684,000 |  |  |  |
Allowance for credit losses | 68,642,000 | $ 71,283,000 | 68,642,000 | $ 71,283,000 | $ 81,770,000 | $ 72,992,000 | $ 67,984,000 | $ 65,888,000
Allowance for credit losses, due to specific reserves | $ 15,800,000 |  | $ 15,800,000 |  |  |  |  |
Allowance for credit losses, percentage of loans | 1.14% |  | 1.14% |  |  | 1.32% |  |
Multifamily Property [Member] |  |  |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |  |  |
Charge-offs |  |  | $ 6,700,000 |  |  |  |  |
Allowance for credit losses, due to specific reserves | $ 4,300,000 |  | 4,300,000 |  |  |  |  |
Equipment Financing Relationship [Member] |  |  |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |  |  |
Charge-offs |  |  | 13,600,000 |  |  |  |  |
Loans [Member] |  |  |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |  |  |
Accrued interest receivable | 30,900,000 |  | 30,900,000 |  |  | $ 26,200,000 |  |
Loans [Member] | Multifamily Property [Member] |  |  |  |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |  |  |  |
Allowance for credit losses, due to specific reserves | $ 506,300,000 |  | $ 506,300,000 |  |  |  |  |

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- Definition Percentage of allowance for credit loss to total financing receivable outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC + Details
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