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LOANS HELD FOR INVESTMENT, NET - Past Due Status (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | $ 10,763,265 | $ 10,766,837
Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 86,176 | 42,366
30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 26,197 | 11,977
60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 25,152 | 1,290
Non-Accrual |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 34,827 | 29,099
90 days or more past due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 0 | 0
Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 10,677,089 | 10,724,471
Business loans |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 2,326,962 | 2,308,171
Business loans | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 25,013 | 26,930
Business loans | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,246 | 7,139
Business loans | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,554 | 1,217
Business loans | Non-Accrual |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 18,213 | 18,574
Business loans | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 2,301,949 | 2,281,241
One-to-four family residential and cooperative/condominium apartment |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 873,335 | 887,555
One-to-four family residential and cooperative/condominium apartment | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 7,629 | 7,392
One-to-four family residential and cooperative/condominium apartment | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,892 | 4,071
One-to-four family residential and cooperative/condominium apartment | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 48 | 73
One-to-four family residential and cooperative/condominium apartment | Non-Accrual |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,689 | 3,248
One-to-four family residential and cooperative/condominium apartment | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 865,706 | 880,163
Multifamily residential and residential mixed-use |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,996,548 | 4,017,176
Multifamily residential and residential mixed-use | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 40,030 |
Multifamily residential and residential mixed-use | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 18,480 |
Multifamily residential and residential mixed-use | 60 to 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 21,550 |
Multifamily residential and residential mixed-use | Non-Accrual |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 0 |
Multifamily residential and residential mixed-use | 90 days or more past due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans 90 Days or More Past Due and Still Accruing Interest | 0 |
Multifamily residential and residential mixed-use | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,956,518 | 4,017,176
Non-owner-occupied commercial real estate |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,385,898 | 3,379,667
Non-owner-occupied commercial real estate | Total real estate loans |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,385,898 | 3,379,667
Non-owner-occupied commercial real estate | Total real estate loans | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 592 | 6,957
Non-owner-occupied commercial real estate | Total real estate loans | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 577 | 337
Non-owner-occupied commercial real estate | Total real estate loans | Non-Accrual |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 15 | 6,620
Non-owner-occupied commercial real estate | Total real estate loans | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 3,385,306 | 3,372,710
Acquisition, development, and construction ("ADC") |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 175,352 | 168,513
Acquisition, development, and construction ("ADC") | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 12,910 | 1,087
Acquisition, development, and construction ("ADC") | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total |  | 430
Acquisition, development, and construction ("ADC") | Non-Accrual |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 12,910 | 657
Acquisition, development, and construction ("ADC") | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 162,442 | 167,426
Other Loans |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 5,170 | 5,755
Other Loans | Total Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 2 |
Other Loans | 30 to 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 2 |
Other Loans | Current |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | $ 5,168 | $ 5,755

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