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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Aging of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 7,289,320 | $ 7,251,480
30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 30,189 | 36,431
60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 8,505 | 3,711
Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 18,843 | 32,609
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 57,537 | 72,751
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 7,231,783 | 7,178,729
Commercial | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,993,416 | 2,668,984
Commercial | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,240,927 | 1,311,105
Commercial | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,698,455 | 1,361,054
Commercial | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 85,674 | 205,548
Commercial | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 236,495 | 181,841
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,993,416 | 2,668,984
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,269 | 9,342
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 5,670 | 1,351
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 577 | 9,503
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 8,516 | 20,196
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,984,900 | 2,648,788
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,240,927 | 1,311,105
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 910 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 910 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,240,017 | 1,311,105
Commercial | Loans and Finance Receivables, Traditional | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,698,455 | 1,361,054
Commercial | Loans and Finance Receivables, Traditional | Multifamily | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 63 | 786
Commercial | Loans and Finance Receivables, Traditional | Multifamily | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Multifamily | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Multifamily | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 63 | 786
Commercial | Loans and Finance Receivables, Traditional | Multifamily | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,698,392 | 1,360,268
Commercial | Loans and Finance Receivables, Traditional | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 85,674 | 205,548
Commercial | Loans and Finance Receivables, Traditional | SBA | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,205 | 987
Commercial | Loans and Finance Receivables, Traditional | SBA | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 128 | 2,360
Commercial | Loans and Finance Receivables, Traditional | SBA | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 10,168 | 15,941
Commercial | Loans and Finance Receivables, Traditional | SBA | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 11,501 | 19,288
Commercial | Loans and Finance Receivables, Traditional | SBA | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 74,173 | 186,260
Commercial | Loans and Finance Receivables, Traditional | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 236,495 | 181,841
Commercial | Loans and Finance Receivables, Traditional | Construction | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Construction | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Construction | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Construction | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Construction | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 236,495 | 181,841
Consumer | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,947,652 | 1,420,023
Consumer | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 86,701 | 102,925
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,947,652 | 1,420,023
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 26,593 | 24,867
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,707 | 0
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 7,107 | 7,076
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 36,407 | 31,943
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,911,245 | 1,388,080
Consumer | Loans and Finance Receivables, Traditional | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 86,701 | 102,925
Consumer | Loans and Finance Receivables, Traditional | Other consumer | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 59 | 449
Consumer | Loans and Finance Receivables, Traditional | Other consumer | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 81 | 89
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 140 | 538
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 86,561 | $ 102,387

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