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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans Receivable (Details) $ in Thousands | Dec. 31, 2022 USD ($) loan | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | $ 7,115,038 | $ 7,251,480 |  |
Allowance for loan losses | (85,960) | (92,584) |  |
Loans receivable, net | 7,029,078 | 7,158,896 |  |
Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for loan losses | (91,265) | (98,189) | $ (84,213) | $ (61,713)
Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable |  | 1,420,023 |  |
Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable |  | 102,925 |  |
Commercial | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 1,845,960 | 2,668,984 |  |
Commercial | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 1,259,651 | 1,311,105 |  |
Commercial | Multifamily |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 1,689,943 | 1,361,054 |  |
Commercial | SBA |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 68,137 | 205,548 |  |
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 243,553 | 181,841 |  |
Commercial | Warehouse Lending Receivables |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 602,500 | 1,600,000 |  |
Commercial | CARES Act |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | $ 5,700 | $ 123,100 |  |
Financing receivable, number of loans | loan | 20 | 397 |  |
Consumer: |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | $ 7,115,038 |  |  |
Consumer: | Single family residential mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | 1,920,806 | $ 1,420,023 |  |
Consumer: | Other consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable | $ 86,988 | $ 102,925 |  |

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