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v3.21.1

Fair Value - Quantitative Information about Significant Unobservable Inputs Used in Fair Value Measurements (Detail) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 6,724,530 | $ 5,970,115
Pooled trust preferred securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Percentage of adjusted specific issuer evaluation defaults | 100.00% |
Percentage of adjusted specific issuer evaluation recoveries | 100.00% |
Pooled trust preferred securities | Minimum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Percentage of adjusted specific issuer evaluation defaults | 0.00% |
Percentage of adjusted specific issuer evaluation recoveries | 0.00% |
Pooled trust preferred securities | Maximum |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Percentage of adjusted specific issuer evaluation defaults | 50.00% |
Percentage of adjusted specific issuer evaluation recoveries | 25.00% |
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 8,210 | $ 7,913
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Constant Prepayment Rate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.0000 | 0.0000
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Minimum | Additional Asset Defaults |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.060 | 0.060
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Minimum | Expected Asset Recoveries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.000 | 0.000
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Maximum | Additional Asset Defaults |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.087 | 0.087
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Maximum | Expected Asset Recoveries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.233 | 0.232
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Weighted Average | Additional Asset Defaults |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.069 | 0.068
Significant Unobservable Inputs (Level 3) | Pooled trust preferred securities | Weighted Average | Expected Asset Recoveries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.074 | 0.073
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 12,484 | $ 10,747
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Commercial real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 18,983 | $ 40,653
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Minimum | Discount for Type of Property, Age of Appraisal, and Current Status | Commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.02 | 0
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Minimum | Discount for Type of Property, Age of Appraisal, and Current Status | Commercial real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.04 | 0
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Maximum | Discount for Type of Property, Age of Appraisal, and Current Status | Commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.27 | 0.33
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Maximum | Discount for Type of Property, Age of Appraisal, and Current Status | Commercial real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.20 | 0.18
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Weighted Average | Discount for Type of Property, Age of Appraisal, and Current Status | Commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.10 | 0.12
Significant Unobservable Inputs (Level 3) | Collateral Dependent Loans | Weighted Average | Discount for Type of Property, Age of Appraisal, and Current Status | Commercial real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.12 | 0.07
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 15 |
Number of loans | loan | 1 |
Significant Unobservable Inputs (Level 3) | Foreclosed Assets | Minimum | Discount for Type of Property, Age of Appraisal, and Current Status | Residential real estate |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Unobservable Input | 0.60 |

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