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DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis (Detail) $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 1,979,832 | $ 1,985,438
Other real estate owned | 12,432 | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 281,839 | 13,236
Asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 281,839 | 13,236
Asset-backed securities | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 281,839 | $ 13,236
Other real estate owned | Significant Unobservable Inputs (Level 3) | Collateral appraisal |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate owned, weighted average range | 6.00% |
Other real estate owned | Significant Unobservable Inputs (Level 3) | Fair Value Estimate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate owned | $ 12,432 |
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.08 | 0.09
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Annualized loss rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.04 | 0.05
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Constant prepayment rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.19 | 0.19
Minimum | Other real estate owned | Significant Unobservable Inputs (Level 3) | Collateral appraisal |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate owned, weighted average range | 6.00% |
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.09 | 0.10
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Annualized loss rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.12 | 0.10
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Constant prepayment rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.20 | 0.20
Maximum | Other real estate owned | Significant Unobservable Inputs (Level 3) | Collateral appraisal |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other real estate owned, weighted average range | 7.00% |
Weighted Average | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.08 | 0.10
Weighted Average | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Annualized loss rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.06 | 0.07
Weighted Average | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Constant prepayment rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset-backed securities, measurement input | 0.19 | 0.19

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