LOANS HELD FOR INVESTMENT, NET - Amortized Cost of Loans Modified (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 109,075	$ 3,325
% of Total Class of Financing Receivable	1.00%	0.00%
Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 1,889
Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	94,196	$ 2,850
Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	708	475
Significant Payment Delay and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	29
Significant Payment Delay, Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	12,253
Business loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 3,429	$ 475
% of Total Class of Financing Receivable	0.10%	0.00%
Business loans | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 1,889
Business loans | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	1,207
Business loans | Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	304	$ 475
Business loans | Significant Payment Delay and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	29
One-to-four family residential and cooperative/condominium apartment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 404	$ 2,850
% of Total Class of Financing Receivable	0.00%	0.40%
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		$ 2,850
One-to-four family residential and cooperative/condominium apartment | Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 404
Multifamily residential and residential mixed-use
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 61,832
% of Total Class of Financing Receivable	1.50%
Multifamily residential and residential mixed-use | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 61,832
Non-owner-occupied commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 31,157
% of Total Class of Financing Receivable	0.90%
Non-owner-occupied commercial real estate | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 31,157
Acquisition, development, and construction ("ADC")
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 12,253
% of Total Class of Financing Receivable	7.00%
Acquisition, development, and construction ("ADC") | Significant Payment Delay, Term Extension and Interest Rate Reduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 12,253