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FAIR VALUE MEASUREMENT - Schedule of Level 3 Unobservable Inputs (Details) $ in Thousands | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | --- | --- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Investment securities AFS | $ 1,354,198 |  | $ 1,378,774 |  |  |
Interest rate lock commitments |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Interest rate lock commitments, net | 79 | $ 362 | 105 | $ 322 | $ 78 | $ 2,484
Recurring |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Single family LHFI | 1,269 |  | 5,868 |  |  |
Recurring | Level 3 |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Single family LHFI | 1,269 |  | 5,868 |  |  |
Recurring | Level 3 | Investment securities AFS |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Investment securities AFS | 1,913 |  | 2,009 |  |  |
Recurring | Level 3 | Single family LHFI |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |
Single family LHFI | 1,269 |  | 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 | $ 79 |  | $ 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 | 0.0351 |  | 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 | 0.0699 |  | 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 | 0.0449 |  | 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 | 0.0060 |  | 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 | 0.2739 |  | 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 | 0.0990 |  | 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 | 0.0041 |  | 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 | 0.0120 |  | 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 | 0.0077 |  | 0.0095 |  |  |

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