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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Aging of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 7,156,206 | $ 7,115,038
30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 48,287 | 41,101
60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 16,459 | 5,565
Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 40,169 | 44,554
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 104,915 | 91,220
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 7,051,291 | 7,023,818
Commercial | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,000,408 | 1,845,960
Commercial | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,266,438 | 1,259,651
Commercial | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,654,152 | 1,689,943
Commercial | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 62,898 | 68,137
Commercial | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 264,684 | 243,553
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,000,408 | 1,845,960
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,430 | 4,002
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 4,442 | 481
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 16,631 | 13,833
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 22,503 | 18,316
Commercial | Loans and Finance Receivables, Traditional | Commercial and industrial | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,977,905 | 1,827,644
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,266,438 | 1,259,651
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 2,047 | 311
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 831 | 0
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,760 | 910
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 4,638 | 1,221
Commercial | Loans and Finance Receivables, Traditional | Commercial real estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,261,800 | 1,258,430
Commercial | Loans and Finance Receivables, Traditional | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,654,152 | 1,689,943
Commercial | Loans and Finance Receivables, Traditional | Multifamily | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 0 | 0
Commercial | Loans and Finance Receivables, Traditional | Multifamily | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,124 | 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 | 1,124 | 0
Commercial | Loans and Finance Receivables, Traditional | Multifamily | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,653,028 | 1,689,943
Commercial | Loans and Finance Receivables, Traditional | SBA |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 62,898 | 68,137
Commercial | Loans and Finance Receivables, Traditional | SBA | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 735 | 287
Commercial | Loans and Finance Receivables, Traditional | SBA | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 247 | 0
Commercial | Loans and Finance Receivables, Traditional | SBA | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 9,193 | 10,299
Commercial | Loans and Finance Receivables, Traditional | SBA | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 10,175 | 10,586
Commercial | Loans and Finance Receivables, Traditional | SBA | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 52,723 | 57,551
Commercial | Loans and Finance Receivables, Traditional | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 264,684 | 243,553
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 | 264,684 | 243,553
Consumer | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,820,721 | 1,920,806
Consumer | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 86,905 | 86,988
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,820,721 | 1,920,806
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 43,956 | 36,338
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 9,466 | 5,068
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 12,504 | 19,431
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 65,926 | 60,837
Consumer | Loans and Finance Receivables, Traditional | Single family residential mortgage | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,754,795 | 1,859,969
Consumer | Loans and Finance Receivables, Traditional | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 86,905 | 86,988
Consumer | Loans and Finance Receivables, Traditional | Other consumer | 30 - 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 119 | 163
Consumer | Loans and Finance Receivables, Traditional | Other consumer | 60 - 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 349 | 16
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Greater than 89 Days Past due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 81 | 81
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 549 | 260
Consumer | Loans and Finance Receivables, Traditional | Other consumer | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 86,356 | $ 86,728

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