LOANS HELD FOR INVESTMENT, NET - Performance of Modified Loans, After 12 Months (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 2,104	$ 880	$ 87,565	$ 3,732
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	117,854	3,732	117,854	3,732
Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	87,646	2,852	87,646	2,852
60 to 89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	27,577		27,577
Non-Accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	2,631	880	2,631	880
Business Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	1,200	880	2,857	880
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	5,470	880	5,470	880
Business Loans | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	3,743		3,743
Business Loans | Non-Accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	1,727	880	1,727	880
One-to-Four Family Residential and Cooperative/Condominium Apartment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	904		1,325	2,852
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	4,293	2,852	4,293	2,852
One-to-Four Family Residential and Cooperative/Condominium Apartment | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	3,389	$ 2,852	3,389	$ 2,852
One-to-Four Family Residential and Cooperative/Condominium Apartment | Non-Accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	904		904
Multifamily Residential and Residential Mixed-Use
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			52,290
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	52,290		52,290
Multifamily Residential and Residential Mixed-Use | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	24,713		24,713
Multifamily Residential and Residential Mixed-Use | 60 to 89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	27,577		27,577
Non-Owner-Occupied Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			31,093
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	55,801		55,801
Non-Owner-Occupied Commercial Real Estate | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans that defaulted during the quarter and were modified in the 12 months before default to borrowers experiencing financial difficulty	$ 55,801		$ 55,801