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LOANS HELD FOR INVESTMENT, NET - TDRs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) contract	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) contract	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	$ 83,507	$ 83,507	$ 83,507	$ 83,853	$ 83,853	$ 83,853	$ 41,461	$ 28,441
Number of Loans \| loan			12			4
Pre-Modification Outstanding Recorded Investment	37,463			10,923
Post-Modification Outstanding Recorded Investment	37,467			10,955
TDRs
Financing Receivable, Allowance for Credit Loss [Line Items]
Modifications recorded investment	22,100	22,100	$ 22,100	942	942	$ 942
Allowance for credit losses	9,100	9,100	9,100	483	483	483
Commitments to lend additional amounts	0			0
Charge offs relating to TDRs	0			0
Number of Loans \| loan							0
Provision for Loan and Lease Losses	483
One-to-four family residential and cooperative/condominium apartment
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	5,969	5,969	$ 5,969	5,932	5,932	$ 5,932	$ 644	269
Number of Loans \| loan			2			2
Pre-Modification Outstanding Recorded Investment	762			467
Post-Modification Outstanding Recorded Investment	762			467
Commercial real estate ("CRE")
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	27,329	$ 27,329	$ 27,329	29,166	$ 29,166	$ 29,166	9,059	3,900
Number of Loans		1	1		1	1
Pre-Modification Outstanding Recorded Investment	991			10,000
Post-Modification Outstanding Recorded Investment	991			10,000
Acquisition, development, and construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	1,723	$ 1,723	$ 1,723	4,857	$ 4,857	$ 4,857	1,993	1,244
Number of Loans		1	1
Pre-Modification Outstanding Recorded Investment	13,500
Post-Modification Outstanding Recorded Investment	13,500
Commercial and Industrial ("C&I") Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	39,853	$ 39,853	$ 39,853	35,331	35,331	$ 35,331	12,737	12,870
Number of Loans \| loan			7			1
Pre-Modification Outstanding Recorded Investment	21,934			456
Post-Modification Outstanding Recorded Investment	21,938			488
Other Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses	273	$ 273	$ 273	$ 751	$ 751	$ 751	$ 12	$ 16
Number of Loans \| loan			1
Pre-Modification Outstanding Recorded Investment	276
Post-Modification Outstanding Recorded Investment	$ 276