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LOANS HELD FOR INVESTMENT, NET - Past Due Status (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Past Due, Financial Instrument [Abstract] |  |
Total | $ 10,886,387 | $ 10,766,837
Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 87,729 | 42,366
30 to 59 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 8,238 | 11,977
60 to 89 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 30,028 | 1,290
90 days or more past due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 0 | 0
Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 49,463 | 29,099
Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 10,798,658 | 10,724,471
Business Loans |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 2,651,729 | 2,308,171
Business Loans | Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 31,642 | 26,930
Business Loans | 30 to 59 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 5,098 | 7,139
Business Loans | 60 to 89 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 1,133 | 1,217
Business Loans | Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 25,411 | 18,574
Business Loans | Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 2,620,087 | 2,281,241
One-to-Four Family Residential and Cooperative/Condominium Apartment |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 932,767 | 887,555
One-to-Four Family Residential and Cooperative/Condominium Apartment | Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 5,856 | 7,392
One-to-Four Family Residential and Cooperative/Condominium Apartment | 30 to 59 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 680 | 4,071
One-to-Four Family Residential and Cooperative/Condominium Apartment | 60 to 89 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 1,296 | 73
One-to-Four Family Residential and Cooperative/Condominium Apartment | Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 3,880 | 3,248
One-to-Four Family Residential and Cooperative/Condominium Apartment | Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 926,911 | 880,163
Multifamily Residential and Residential Mixed-Use |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 3,866,478 | 4,017,176
Multifamily Residential and Residential Mixed-Use | Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 29,725 |
Multifamily Residential and Residential Mixed-Use | 30 to 59 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 2,126 |
Multifamily Residential and Residential Mixed-Use | 60 to 89 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 27,599 |
Multifamily Residential and Residential Mixed-Use | 90 days or more past due |  |
Past Due, Financial Instrument [Abstract] |  |
Loans 90 Days or More Past Due and Still Accruing Interest | 0 |
Multifamily Residential and Residential Mixed-Use | Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 0 |
Multifamily Residential and Residential Mixed-Use | Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 3,836,753 | 4,017,176
Non-Owner-Occupied Commercial Real Estate |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 3,280,056 | 3,379,667
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 3,280,056 | 3,379,667
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 19,843 | 6,957
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | 30 to 59 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 334 | 337
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 19,509 | 6,620
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 3,260,213 | 3,372,710
Acquisition, development, and construction ("ADC") |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 149,299 | 168,513
Acquisition, development, and construction ("ADC") | Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 657 | 1,087
Acquisition, development, and construction ("ADC") | 30 to 59 Days Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total |  | 430
Acquisition, development, and construction ("ADC") | Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 657 | 657
Acquisition, development, and construction ("ADC") | Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 148,642 | 167,426
Other Loans |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 6,058 | 5,755
Other Loans | Total Past Due |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 6 |
Other Loans | Non-Accrual |  |
Past Due, Financial Instrument [Abstract] |  |
Total | 6 |
Other Loans | Current |  |
Past Due, Financial Instrument [Abstract] |  |
Total | $ 6,052 | $ 5,755

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