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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Aging of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 7,451,264 | $ 7,251,480
30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 32,755 | 36,431
60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 5,530 | 3,711
Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 23,905 | 32,609
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 62,190 | 72,751
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 7,389,074 | 7,178,729
Commercial | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,433,464 | 2,668,984
Commercial | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,204,414 | 1,311,105
Commercial | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,572,308 | 1,361,054
Commercial | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 92,235 | 205,548
Commercial | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 228,341 | 181,841
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,433,464 | 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 | 3,433 | 9,342
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,567 | 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 | 7,204 | 9,503
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 13,204 | 20,196
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,420,260 | 2,648,788
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,204,414 | 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 | 893 | 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 | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 893 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,203,521 | 1,311,105
Commercial | Loans and Finance Receivables, Traditional | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,572,308 | 1,361,054
Commercial | Loans and Finance Receivables, Traditional | Multifamily | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 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 | 0 | 786
Commercial | Loans and Finance Receivables, Traditional | Multifamily | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,572,308 | 1,360,268
Commercial | Loans and Finance Receivables, Traditional | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 92,235 | 205,548
Commercial | Loans and Finance Receivables, Traditional | SBA | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 4,766 | 987
Commercial | Loans and Finance Receivables, Traditional | SBA | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 115 | 2,360
Commercial | Loans and Finance Receivables, Traditional | SBA | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 10,087 | 15,941
Commercial | Loans and Finance Receivables, Traditional | SBA | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 14,968 | 19,288
Commercial | Loans and Finance Receivables, Traditional | SBA | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 77,267 | 186,260
Commercial | Loans and Finance Receivables, Traditional | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 228,341 | 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 | 228,341 | 181,841
Consumer | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,832,279 | 1,420,023
Consumer | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 88,223 | 102,925
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,832,279 | 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 | 23,226 | 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 | 2,848 | 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 | 6,430 | 7,076
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 32,504 | 31,943
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,799,775 | 1,388,080
Consumer | Loans and Finance Receivables, Traditional | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 88,223 | 102,925
Consumer | Loans and Finance Receivables, Traditional | Other consumer | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 437 | 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 | 184 | 89
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 621 | 538
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 87,602 | $ 102,387

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