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Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) derivative	Sep. 30, 2023 USD ($) derivative	Sep. 30, 2022 USD ($) derivative	Dec. 31, 2022 USD ($) derivative
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, net liability position, aggregate fair value		$ 28,400
Cash collateral received		$ 30,300
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period		30 days
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative expiration period		60 days
Not Designated as Hedging Instrument | Residential mortgage loan commitments
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount		$ 2,700		$ 1,500
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral received		$ 28,419		$ 29,087
Interest Rate Contract | Derivative Designated as Hedging Instrument | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Number of outstanding interest rate derivatives | derivative		6		3
Aggregate notional amount		$ 472,500		$ 22,500
Number of interest rate derivatives entered into during the period | derivative		5
Number of interest rate derivatives terminated | derivative	4	2	13
Aggregate notional amount, terminated	$ 10,000	$ 550,000	$ 58,000
Notional amount of basis adjustments		4,600
Interest rate swaps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount		$ 1,200,000		$ 1,300,000
Number of derivative instruments held | derivative		129		141
Interest rate caps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount		$ 179,000		$ 245,800
Number of derivative instruments held | derivative		10		12
Credit contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount		$ 97,600		$ 142,000

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