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Derivative Instruments and Hedging Activities - Narrative (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) derivative contract	Dec. 31, 2023 USD ($) derivative contract	Dec. 31, 2022 USD ($) derivative
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, net liability position, aggregate fair value	$ 14.2
Cash collateral received	$ 14.6
Not Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps | derivative	128	132
Derivative notional amount	$ 1,200.0	$ 1,200.0
Not Designated as Hedging Instrument | Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate swaps | derivative	2	2
Derivative notional amount	$ 150.0	$ 55.6
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
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 interest rate swaps | derivative	46	6
Derivative notional amount	$ 2,400.0	$ 472.5
Notional amount of interest rate derivatives entered into during the period		$ 1,000.0
Number of contracts terminated | derivative			13
Fair Value Hedging | Designated as Hedging Instrument | Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Number of interest rate derivatives entered into during the period | derivative	44	5
Notional amount of interest rate derivatives entered into during the period	$ 2,000.0
Number of derivatives terminated | derivative	1	2
National amount of derivatives terminated	$ 5.7	$ 550.0
Notional amount of basis adjustments		$ 4.6
Fair Value Hedging | Designated as Hedging Instrument | Terminated interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount			$ 58.0

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