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FAIR VALUE MEASURES - Fair Value Measurements of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale | $ 395,096 | $ 392,078
Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale | 395,096 | 392,078
Total recurring assets at fair value | 1,902,488 | 1,900,651
Total recurring liabilities at fair value | 9,806 | 4,574
Fair Value, Measurements, Recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale | 0 | 0
Total recurring assets at fair value | 766,129 | 759,534
Total recurring liabilities at fair value | 0 | 0
Fair Value, Measurements, Recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale | 395,096 | 392,078
Total recurring assets at fair value | 1,135,459 | 1,139,962
Total recurring liabilities at fair value | 9,806 | 4,574
Fair Value, Measurements, Recurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 900 | 1,155
Loans held for sale | 0 | 0
Total recurring assets at fair value | 900 | 1,155
Total recurring liabilities at fair value | 0 | 0
Fair Value, Measurements, Recurring | Derivative financial instruments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 4,109 | 4,580
Derivative liability | 4,429 | 4,574
Fair Value, Measurements, Recurring | Derivative financial instruments | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 0 | 0
Derivative liability | 0 | 0
Fair Value, Measurements, Recurring | Derivative financial instruments | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 4,109 | 4,580
Derivative liability | 4,429 | 4,574
Fair Value, Measurements, Recurring | Derivative financial instruments | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 0 | 0
Derivative liability | 0 | 0
Fair Value, Measurements, Recurring | Mortgage banking derivative instruments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 6,447 | 3,933
Derivative liability | 5,377 |
Fair Value, Measurements, Recurring | Mortgage banking derivative instruments | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 0 | 0
Derivative liability | 0 |
Fair Value, Measurements, Recurring | Mortgage banking derivative instruments | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 6,447 | 3,933
Derivative liability | 5,377 |
Fair Value, Measurements, Recurring | Mortgage banking derivative instruments | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage banking derivative instruments | 0 | 0
Derivative liability | 0 |
Fair Value, Measurements, Recurring | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 766,129 | 759,534
Fair Value, Measurements, Recurring | U.S. Treasuries | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 766,129 | 759,534
Fair Value, Measurements, Recurring | U.S. Treasuries | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | U.S. Treasuries | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | U.S. government-sponsored agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 987 | 979
Fair Value, Measurements, Recurring | U.S. government-sponsored agencies | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | U.S. government-sponsored agencies | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 987 | 979
Fair Value, Measurements, Recurring | U.S. government-sponsored agencies | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | State, county and municipal securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 33,213 | 34,195
Fair Value, Measurements, Recurring | State, county and municipal securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | State, county and municipal securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 33,213 | 34,195
Fair Value, Measurements, Recurring | State, county and municipal securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 15,610 | 15,926
Fair Value, Measurements, Recurring | Corporate debt securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | Corporate debt securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 14,710 | 14,771
Fair Value, Measurements, Recurring | Corporate debt securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 900 | 1,155
Fair Value, Measurements, Recurring | SBA pool securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 25,342 | 27,398
Fair Value, Measurements, Recurring | SBA pool securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | SBA pool securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 25,342 | 27,398
Fair Value, Measurements, Recurring | SBA pool securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 655,555 | 662,028
Fair Value, Measurements, Recurring | Mortgage-backed securities | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 0 | 0
Fair Value, Measurements, Recurring | Mortgage-backed securities | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | 655,555 | 662,028
Fair Value, Measurements, Recurring | Mortgage-backed securities | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities available for sale, at fair value | $ 0 | $ 0

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