Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) derivative	Sep. 30, 2022 USD ($) derivative	Sep. 30, 2021 USD ($) derivative	Dec. 31, 2021 USD ($) derivative
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, net liability position, aggregate fair value	$ 31,500	$ 31,500
Cash collateral received	29,800	$ 29,800
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	1,800	$ 1,800		$ 8,200
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral received	$ 31,495	$ 31,495		$ 0
Interest Rate Contract | Derivative Designated as Hedging Instrument | Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives terminated | derivative			4
Aggregate notional amount, terminated			$ 850,000
Reclassification of realized losses from AOCI, discontinuation of cash flow hedge			$ 25,900
Number of outstanding interest rate derivatives | derivative	0	0		0
Interest Rate Contract | Derivative Designated as Hedging Instrument | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives terminated | derivative	4	13	8
Aggregate notional amount, terminated	$ 10,000	$ 58,000	$ 191,800
Number of outstanding interest rate derivatives | derivative	3	3		16
Aggregate notional amount	$ 22,500	$ 22,500		$ 80,500
Interest rate swaps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 1,300,000	$ 1,300,000		$ 1,400,000
Number of derivative instruments held | derivative	147	147		153
Interest rate caps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 242,300	$ 242,300		$ 264,700
Number of derivative instruments held | derivative	12,000	12,000		14,000
Credit contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 143,100	$ 143,100		$ 129,900