LOANS HELD FOR INVESTMENT, NET - Amortized Cost of Loans Modified (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 40,680	$ 34,024	$ 108,288	$ 37,747
% of Total Class of Financing Receivable	0.40%	0.30%	1.00%	0.30%
Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 15,971		$ 16,077	$ 126
Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		$ 33,995	66,384	36,849
Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			190	471
Significant Payment Delay and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	24,709	29	24,737	301
Term Extension and Interest Rate Reductions
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			900
Business Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 15,971	$ 9,319	$ 17,487	$ 10,188
% of Total Class of Financing Receivable	0.60%	0.40%	0.70%	0.40%
Business Loans | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 15,971		$ 16,077	$ 126
Business Loans | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		$ 9,290	1,192	9,290
Business Loans | Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			190	471
Business Loans | Significant Payment Delay and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		29	28	301
One-to-Four Family Residential and Cooperative/Condominium Apartment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			$ 900	$ 2,854
% of Total Class of Financing Receivable			0.10%	0.30%
One-to-Four Family Residential and Cooperative/Condominium Apartment | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified				$ 2,854
One-to-Four Family Residential and Cooperative/Condominium Apartment | Term Extension and Interest Rate Reductions
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			$ 900
Multifamily Residential and Residential Mixed-Use
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			$ 34,095
% of Total Class of Financing Receivable			0.90%
Multifamily Residential and Residential Mixed-Use | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified			$ 34,095
Non-Owner-Occupied Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 24,709	$ 24,705	$ 55,806	$ 24,705
% of Total Class of Financing Receivable	0.80%	0.70%	1.70%	0.70%
Non-Owner-Occupied Commercial Real Estate | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		$ 24,705	$ 31,097	$ 24,705
Non-Owner-Occupied Commercial Real Estate | Significant Payment Delay and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 24,709		$ 24,709