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ADVANCES FROM THE FEDERAL HOME LOAN BANK (FHLB) - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Federal Home Loan Bank, Advances [Line Items] |  |
Additional capacity on credit facility based on collateral pledged | $ 644,200 |
Fixed-rate advances from FHLB | 675,000 | $ 200,000
Average balance during the year | $ 179,500 | $ 354,100
FHLB for collateral purposes, haircut percent | 14.00% | 17.00%
Estimated value of U.S. government-sponsored agencies' obligations and U.S. agencies MBS pledged as collateral amount | $ 238,100 |
Loans held for investment | 11,552,825 | $ 11,060,658
Asset Pledged as Collateral [Member] |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Loans held for investment | 4,300,000 | 4,100,000
Maximum [Member] |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Maximum aggregate balance of advances from the FHLB outstanding at any month-end during period | 675,000 | 440,000
Short-term Debt [Member] |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Fixed-rate advances from FHLB | 475,000 | 0
Long-term Debt [Member] |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Fixed-rate advances from FHLB | 200,000 | 200,000
Federal Home Loan Bank Advances [Member] | Asset Pledged as Collateral [Member] |  |
Federal Home Loan Bank, Advances [Line Items] |  |
Loans held for investment | 1,800,000 | 1,800,000
Loans pledged including collateral | $ 1,300,000 | $ 1,400,000

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