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Derivative Financial Instruments (Narrative) (Detail) | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) derivativeInstrument | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) derivativeInstrument | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) derivativeInstrument | Dec. 31, 2021 USD ($) derivativeInstrument
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount to be reclassified from accumulated other comprehensive income to interest expense in the next twelve months |  |  | $ 11,000,000 |  |  |
Net derivative liability position, aggregate fair value | $ 0 |  | 0 |  |  |
Interest rate swap terminated |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Amount to be reclassified from accumulated other comprehensive income to interest expense in the next twelve months |  |  | 20,300,000 |  |  |
Forward commitments to sell mortgage loans |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | 321,000,000 |  | 321,000,000 |  |  | $ 952,300,000
Mortgage banking derivatives |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | $ 190,000,000 |  | $ 190,000,000 |  |  |
Number of derivative instruments held | derivativeInstrument | 3 |  | 3 |  |  | 0
Not designed as hedging instrument | Interest rate contract |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | $ 0 |  | $ 0 |  |  |
Not designed as hedging instrument | Interest rate contract terminated |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | 1,000,000,000 |  | 1,000,000,000 |  |  |
Not designed as hedging instrument | Interest rate contract, qualified borrowers |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | 9,600,000,000 |  | 9,600,000,000 |  |  |
Not designed as hedging instrument | Interest rate lock commitments |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | 121,600,000 |  | 121,600,000 |  |  |
Not designed as hedging instrument | Forward commitments to sell mortgage loans |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | 321,000,000 |  | 321,000,000 |  |  |
Not designed as hedging instrument | Commodity forward contracts |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | 3,600,000 |  | 3,600,000 |  |  | $ 0
Not designed as hedging instrument | Foreign exchange contracts |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | $ 226,200,000 |  | $ 226,200,000 |  |  |
Not designed as hedging instrument | Covered call options |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Number of derivative instruments held | derivativeInstrument | 0 |  | 0 |  |  | 0
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | $ 3,000,000,000 |  | $ 3,000,000,000 |  |  |
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest rate swap terminated |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount |  | $ 1,000,000,000 |  |  | $ 500,000,000 |
Derivative term |  | 5 years |  |  |  |
Fair value of derivative contracts |  | $ 66,500,000 |  |  |  |
Number of derivative instruments held | derivativeInstrument |  |  |  |  | 2 |
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing March 2023 |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Fair value of derivative contracts |  |  |  | $ 3,700,000 |  |
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing April 2024 |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Fair value of derivative contracts |  |  |  | 10,700,000 |  |
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Collars Terminated |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | $ 64,300,000 |  | 64,300,000 |  |  |
Fair value of derivative contracts |  |  |  | $ 875,000 |  |
Number of derivative instruments terminated | derivativeInstrument | 1 |  |  |  |  |
Interest rate derivatives designated as Fair Value Hedges | Designated as hedging instrument | Interest rate swaps |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |
Notional amount | $ 207,200,000 |  | $ 207,200,000 |  |  |
Number of Interest rate derivatives | derivativeInstrument | 14 |  | 14 |  |  |

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