FAIR VALUE MEASUREMENT - Schedule of Level 3 Unobservable Inputs (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate lock commitments, net	$ 362	$ 105	$ 78	$ 2,484
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Single family LHFI	5,231	5,868
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Single family LHFI	5,231	5,868
Recurring | Level 3 | Investment securities AFS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities AFS	2,030	2,009
Recurring | Level 3 | Single family LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Single family LHFI	5,231	5,868
Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate lock commitments, net	$ 362	$ 105
Implied spread to benchmark interest rate curve | Low | Recurring | Level 3 | Investment securities AFS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Implied spread to benchmark interest rate curve	0.0200	0.0200
Implied spread to benchmark interest rate curve | Low | Recurring | Level 3 | Single family LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Implied spread to benchmark interest rate curve	0.0318	0.0287
Implied spread to benchmark interest rate curve | High | Recurring | Level 3 | Investment securities AFS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Implied spread to benchmark interest rate curve	0.0200	0.0200
Implied spread to benchmark interest rate curve | High | Recurring | Level 3 | Single family LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Implied spread to benchmark interest rate curve	0.0544	0.0515
Implied spread to benchmark interest rate curve | Weighted Average | Recurring | Level 3 | Investment securities AFS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Implied spread to benchmark interest rate curve	0.0200	0.0200
Implied spread to benchmark interest rate curve | Weighted Average | Recurring | Level 3 | Single family LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Implied spread to benchmark interest rate curve	0.0402	0.0414
Fall-out factor | Low | Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fall-out factor, Value of servicing	0.0007	0.0010
Fall-out factor | High | Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fall-out factor, Value of servicing	0.2260	0.1750
Fall-out factor | Weighted Average | Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fall-out factor, Value of servicing	0.0907	0.0643
Value of servicing | Low | Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fall-out factor, Value of servicing	0.0059	0.0054
Value of servicing | High | Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fall-out factor, Value of servicing	0.0119	0.0111
Value of servicing | Weighted Average | Recurring | Level 3 | Interest rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fall-out factor, Value of servicing	0.0088	0.0095