ADVANCES FROM THE FEDERAL HOME LOAN BANK (FHLB) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances [Line Items]
Fixed-rate advances from FHLB	$ 925,000	$ 675,000
Loans held for investment	11,577,985	$ 11,552,825
Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances	425,000
Payments For Federal Home Loan Bank Advances	$ 475,000
Fixed-rate advances from FHLB, interest rate	5.04%	4.56%
Short-term Debt [Member]
Federal Home Loan Bank, Advances [Line Items]
Fixed-rate advances from FHLB	$ 425,000	$ 475,000
Long-term Debt [Member]
Federal Home Loan Bank, Advances [Line Items]
Fixed-rate advances from FHLB	500,000	$ 200,000
Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances	$ 300,000
Fixed-rate advances from FHLB, interest rate	4.59%

Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions.

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Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

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Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) with fixed interest rate.

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Amount of cash outflow for disbursement to borrower related to advance, made by Federal Home Loan Bank (FHLBank), classified as investing activity.

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