LOANS HELD FOR INVESTMENT, NET - Performance of Loans that have been Modified (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 34,024	$ 37,747
Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		36,849
Non-Accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		898
Business loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	9,319	10,188
Business loans | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		9,290
Business loans | Non-Accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		898
One-to-four family residential and cooperative/condominium apartment
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 | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		2,854
Non-owner-occupied commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified	$ 24,705	24,705
Non-owner-occupied commercial real estate | Current
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loans that have been modified		$ 24,705