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FAIR VALUE MEASUREMENT - Schedule of Quantitative Information (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Investment securities AFS | $ 1,002,522 | $ 1,072,093
Fair Value, Recurring |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Fair value of loans held for investment | 7,287 | 7,108
Fair Value, Recurring | Level 3 |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Investment securities AFS | 2,482 | 2,710
Fair value of loans held for investment | 7,287 | 7,108
Fair Value, Recurring | Level 3 | Single Family |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Fair value of loans held for investment | $ 7,287 | $ 7,108
Implied spread to benchmark interest rate curve | Fair Value, Recurring | Level 3 | Minimum |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Investment securities available for sale, measurement input | 0.0200 | 0.0200
Implied spread to benchmark interest rate curve | Fair Value, Recurring | Level 3 | Minimum | Single Family |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Loans held for investment, measurement input | 0.0239 | 0.0396
Implied spread to benchmark interest rate curve | Fair Value, Recurring | Level 3 | Maximum |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Investment securities available for sale, measurement input | 0.0200 | 0.0200
Implied spread to benchmark interest rate curve | Fair Value, Recurring | Level 3 | Maximum | Single Family |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Loans held for investment, measurement input | 0.0796 | 0.1064
Implied spread to benchmark interest rate curve | Fair Value, Recurring | Level 3 | Weighted Average |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Investment securities available for sale, measurement input | 0.0200 | 0.0200
Implied spread to benchmark interest rate curve | Fair Value, Recurring | Level 3 | Weighted Average | Single Family |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Loans held for investment, measurement input | 0.0356 | 0.0623
Interest rate lock commitments | Fair Value, Recurring | Level 3 |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net | $ 2,484 | $ 17,392
Interest rate lock commitments | Fall-out factor | Fair Value, Recurring | Level 3 | Minimum |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net, measurement input | 0.0015 | 0.0197
Interest rate lock commitments | Fall-out factor | Fair Value, Recurring | Level 3 | Maximum |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net, measurement input | 0.2193 | 0.3838
Interest rate lock commitments | Fall-out factor | Fair Value, Recurring | Level 3 | Weighted Average |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net, measurement input | 0.0844 | 0.1553
Interest rate lock commitments | Value of servicing | Fair Value, Recurring | Level 3 | Minimum |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net, measurement input | 0.0035 | 0.0041
Interest rate lock commitments | Value of servicing | Fair Value, Recurring | Level 3 | Maximum |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net, measurement input | 0.0146 | 0.0144
Interest rate lock commitments | Value of servicing | Fair Value, Recurring | Level 3 | Weighted Average |  |
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs |  |
Interest rate lock and purchase loan commitments, net, measurement input | 0.0115 | 0.0097

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