LOANS HELD FOR INVESTMENT, NET - Past Due Status (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Past Due, Financial Instrument [Abstract]
Total	$ 10,869,328	$ 10,766,837
Total Past Due
Past Due, Financial Instrument [Abstract]
Total	91,122	42,366
30 to 59 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	10,330	11,977
60 to 89 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	31,313	1,290
90 days or more past due
Past Due, Financial Instrument [Abstract]
Total	0	0
Non-Accrual
Past Due, Financial Instrument [Abstract]
Total	49,479	29,099
Current
Past Due, Financial Instrument [Abstract]
Total	10,778,206	10,724,471
Business Loans
Past Due, Financial Instrument [Abstract]
Total	2,725,726	2,308,171
Business Loans | Total Past Due
Past Due, Financial Instrument [Abstract]
Total	28,450	26,930
Business Loans | 30 to 59 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	3,385	7,139
Business Loans | 60 to 89 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	2,441	1,217
Business Loans | Non-Accrual
Past Due, Financial Instrument [Abstract]
Total	22,624	18,574
Business Loans | Current
Past Due, Financial Instrument [Abstract]
Total	2,697,276	2,281,241
One-to-Four Family Residential and Cooperative/Condominium Apartment
Past Due, Financial Instrument [Abstract]
Total	951,528	887,555
One-to-Four Family Residential and Cooperative/Condominium Apartment | Total Past Due
Past Due, Financial Instrument [Abstract]
Total	6,403	7,392
One-to-Four Family Residential and Cooperative/Condominium Apartment | 30 to 59 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	1,919	4,071
One-to-Four Family Residential and Cooperative/Condominium Apartment | 60 to 89 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	1,271	73
One-to-Four Family Residential and Cooperative/Condominium Apartment | Non-Accrual
Past Due, Financial Instrument [Abstract]
Total	3,213	3,248
One-to-Four Family Residential and Cooperative/Condominium Apartment | Current
Past Due, Financial Instrument [Abstract]
Total	945,125	880,163
Multifamily Residential and Residential Mixed-Use
Past Due, Financial Instrument [Abstract]
Total	3,820,283	4,017,176
Multifamily Residential and Residential Mixed-Use | Total Past Due
Past Due, Financial Instrument [Abstract]
Total	31,360
Multifamily Residential and Residential Mixed-Use | 30 to 59 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	3,759
Multifamily Residential and Residential Mixed-Use | 60 to 89 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	27,601
Multifamily Residential and Residential Mixed-Use | Current
Past Due, Financial Instrument [Abstract]
Total	3,788,923	4,017,176
Non-Owner-Occupied Commercial Real Estate
Past Due, Financial Instrument [Abstract]
Total	3,230,535	3,379,667
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member]
Past Due, Financial Instrument [Abstract]
Total	3,230,535	3,379,667
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | Total Past Due
Past Due, Financial Instrument [Abstract]
Total	24,225	6,957
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | 30 to 59 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	1,265	337
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | Non-Accrual
Past Due, Financial Instrument [Abstract]
Total	22,960	6,620
Non-Owner-Occupied Commercial Real Estate | Real Estate Loan [Member] | Current
Past Due, Financial Instrument [Abstract]
Total	3,206,310	3,372,710
Acquisition, development, and construction ("ADC")
Past Due, Financial Instrument [Abstract]
Total	136,172	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	135,515	167,426
Other Loans
Past Due, Financial Instrument [Abstract]
Total	5,084	5,755
Other Loans | Total Past Due
Past Due, Financial Instrument [Abstract]
Total	27
Other Loans | 30 to 59 Days Past Due
Past Due, Financial Instrument [Abstract]
Total	2
Other Loans | Non-Accrual
Past Due, Financial Instrument [Abstract]
Total	25
Other Loans | Current
Past Due, Financial Instrument [Abstract]
Total	$ 5,057	$ 5,755