LOANS HELD FOR INVESTMENT, NET - Amortized cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 42,281
% of Total Class of Financing Receivable	0.40%
Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 1,789
Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	39,582
Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	612
Significant Payment Delay And Interest Rate Deduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	298
C&I
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	14,627
One-to-four family residential and cooperative/condominium apartment
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 2,948
% of Total Class of Financing Receivable	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	$ 2,856
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	$ 92
Multifamily residential and residential mixed-use
Financing Receivable, Allowance for Credit Loss [Line Items]
% of Total Class of Financing Receivable	0.00%
Commercial real estate ("CRE")
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 24,706
% of Total Class of Financing Receivable	0.50%
Commercial real estate ("CRE") | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 24,706
Acquisition, development, and construction ("ADC")
Financing Receivable, Allowance for Credit Loss [Line Items]
% of Total Class of Financing Receivable	0.00%
Commercial and industrial ("C&I"), including SBA and PPP loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 14,627
% of Total Class of Financing Receivable	1.40%
Commercial and industrial ("C&I"), including SBA and PPP loans | Term Extension
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 1,789
Commercial and industrial ("C&I"), including SBA and PPP loans | Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	12,020
Commercial and industrial ("C&I"), including SBA and PPP loans | Term Extension and Significant Payment Delay
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	520
Commercial and industrial ("C&I"), including SBA and PPP loans | Significant Payment Delay And Interest Rate Deduction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 298
Other Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
% of Total Class of Financing Receivable	0.00%