Derivative Instruments And Hedging Activities - Narrative (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($) position Swap contract	Dec. 31, 2021 USD ($) Swap position contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, net liability position, aggregate fair value	$ 29,100
Cash collateral received	29,300
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Cash Collateral Received/Posted	$ 29,087	$ 0
Designated as Hedging Instrument \| Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Reclassification, cash flow hedge, after tax		25,900
Not Designated as Hedging Instrument \| Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period	30 days
Not Designated as Hedging Instrument \| Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period	60 days
Not Designated as Hedging Instrument \| Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 1,300,000	$ 1,400,000
Number of interest rate swaps \| Swap	141	153
Not Designated as Hedging Instrument \| Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 245,800	$ 264,700
Number of interest rate swaps \| Swap	12	14
Not Designated as Hedging Instrument \| Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 1,500	$ 8,200
Not Designated as Hedging Instrument \| Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 142,000	$ 129,900
Cash Flow Hedging \| Designated as Hedging Instrument \| Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of contracts terminated \| contract		4
Derivative notional amount		$ 850,000
Number of interest rate swaps \| contract	0	0
Fair Value Hedging \| Designated as Hedging Instrument \| Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of contracts terminated \| position	13	8
Derivative notional amount	$ 22,500	$ 80,500
Number of interest rate swaps \| position	3	16
Fair Value Hedging \| Designated as Hedging Instrument \| Terminated Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 58,000	$ 191,800

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Derivative, Number of Contracts Terminated

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- Definition

Fair value of securities received as collateral against derivative assets.

+ References

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nominal or face amount used to calculate payment on derivative.

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The number of derivative instruments of a particular group held by the entity.

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- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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