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FAIR VALUE - FV of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
--- | --- | --- | --- | ---
Assets: |  |  |  |
Securities held-to-maturity, fair value | $ 1,186,260 |  | $ 1,196,000 |
Loans held for sale - multifamily and other | 21,397 |  |  |
Mortgage servicing rights – multifamily and SBA | 59,536 |  |  |
Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents | 1,442,647 |  | 999,711 |
Securities held-to-maturity, fair value | 1,186,260 |  | 1,196,000 |
Loan and lease receivables, net | 13,948,529 |  | 8,817,007 |
Liabilities: |  |  |  |
Time deposits | 3,378,332 |  | 960,276 |
Long-term debt | 198,516 |  |  |
Carrying Value |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents | 1,442,647 |  | 999,711 |
Securities held-to-maturity, fair value | 1,363,636 |  | 1,440,494 |
Loan and lease receivables, net | 14,399,836 |  | 9,554,939 |
Liabilities: |  |  |  |
Time deposits | 3,387,240 |  | 970,053 |
Long-term debt | 190,123 |  |  |
Multifamily |  |  |  |
Assets: |  |  |  |
Mortgage servicing rights – multifamily and SBA |  |  | 0 | $ 0
Multifamily | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other | 33,655 |  |  |
Mortgage servicing rights – multifamily and SBA | 29,213 |  |  |
Multifamily | Carrying Value |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other | 33,588 |  |  |
Mortgage servicing rights – multifamily and SBA | 29,059 |  |  |
Single Family Residential |  |  |  |
Assets: |  |  |  |
Mortgage servicing rights – multifamily and SBA | 59,536 | $ 0 | 0 |
Single Family Residential | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other |  |  | 543 |
Single Family Residential | Carrying Value |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other |  |  | 543 |
Level 1 | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents | 1,442,647 |  | 999,711 |
Securities held-to-maturity, fair value | 0 |  | 0 |
Loan and lease receivables, net | 0 |  | 0 |
Liabilities: |  |  |  |
Time deposits | 0 |  | 0 |
Long-term debt | 0 |  |  |
Level 1 | Multifamily | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other | 0 |  |  |
Mortgage servicing rights – multifamily and SBA | 0 |  |  |
Level 1 | Single Family Residential | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other |  |  |  |
Level 2 | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents | 0 |  | 0 |
Securities held-to-maturity, fair value | 1,183,260 |  | 1,193,000 |
Loan and lease receivables, net | 0 |  | 0 |
Liabilities: |  |  |  |
Time deposits | 3,378,332 |  | 960,276 |
Long-term debt | 198,516 |  |  |
Level 2 | Multifamily | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other | 33,655 |  |  |
Mortgage servicing rights – multifamily and SBA | 0 |  |  |
Level 2 | Single Family Residential | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other |  |  |  |
Level 3 | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents | 0 |  | 0 |
Securities held-to-maturity, fair value | 3,000 |  | 3,000 |
Loan and lease receivables, net | 13,948,529 |  | 8,817,007 |
Liabilities: |  |  |  |
Time deposits | 0 |  | 0 |
Long-term debt | 0 |  |  |
Level 3 | Multifamily | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other | 0 |  |  |
Mortgage servicing rights – multifamily and SBA | $ 29,213 |  |  |
Level 3 | Single Family Residential | Estimate of Fair Value Measurement |  |  |  |
Assets: |  |  |  |
Loans held for sale - multifamily and other |  |  | $ 543 |

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