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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 | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, available for sale | $ 2,961,015 | $ 3,791,575
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, available for sale | 73,266 | 142,885
Asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, available for sale | 160,542 | 297,425
Asset-backed securities | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, available for sale | 73,266 | 142,885
Residential mortgage loan commitments | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Residential mortgage loan commitments | $ 55 | $ 179
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, available-for-sale, measurement input | 0.09 | 0.04
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] |  |
Debt securities, available-for-sale, measurement input | 0.04 | 0.04
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] |  |
Debt securities, available-for-sale, measurement input | 0.19 | 0.17
Minimum | Residential mortgage loan commitments | Significant Unobservable Inputs (Level 3) | Pull-through rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Residential mortgage loans, measurement input | 0.84 | 0.76
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt securities, available-for-sale, measurement input | 0.09 | 0.05
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] |  |
Debt securities, available-for-sale, measurement input | 0.05 | 0.04
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] |  |
Debt securities, available-for-sale, measurement input | 0.25 | 0.33
Maximum | Residential mortgage loan commitments | Significant Unobservable Inputs (Level 3) | Pull-through rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Residential mortgage loans, measurement input | 1 | 0.89
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] |  |
Debt securities, available-for-sale, measurement input | 0.09 | 0.05
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] |  |
Debt securities, available-for-sale, measurement input | 0.05 | 0.04
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] |  |
Debt securities, available-for-sale, measurement input | 0.23 | 0.19
Weighted Average | Residential mortgage loan commitments | Significant Unobservable Inputs (Level 3) | Pull-through rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Residential mortgage loans, measurement input | 0.86 | 0.85
Real estate | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans | $ 4,730 | $ 4,170
Real estate | Minimum | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Liquidation expenses |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.07 | 0.08
Real estate | Maximum | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Liquidation expenses |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.13 | 0.08
Real estate | Weighted Average | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Liquidation expenses |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.11 | 0.08
Other commercial and industrial | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans | $ 89 | $ 951
Other commercial and industrial | Minimum | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Liquidation expenses |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.08 | 0.08
Other commercial and industrial | Minimum | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Business asset valuation adjustments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.25 | 0.20
Other commercial and industrial | Maximum | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Liquidation expenses |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.08 | 0.26
Other commercial and industrial | Maximum | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Business asset valuation adjustments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.25 | 0.20
Other commercial and industrial | Weighted Average | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Liquidation expenses |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.08 | 0.12
Other commercial and industrial | Weighted Average | Collateral-dependent loans | Significant Unobservable Inputs (Level 3) | Business asset valuation adjustments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral-dependent loans, measurement input | 0.25 | 0.20

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